Aug. 29, 1967'
A. w. HOLST:EIN ETAL
-
3,338,153
VENDOR
' Filed April 6, 1964
4 Sheets-Sheet 1
F162
FICiI.‘ ‘
3)
I03
(5
59
63
29', 1967
-A. w. HOLSTEIN ETAL
3,338,153
’ VENDOR
Filed April 6, 1964
4 Sheeis-Sheet 4
93
10/
FIGS.
(9,
/25 "'
I 117
1/3 11/
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123
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F168.
United States Patent 0
1
CC
Patented Aug. 29, 1967
1
2
3,338,153
forced upward through a ?lter and down back through
the ?lter, and which is‘adapted for discharge of the spent
coffee grounds therefrom after the brewing of each batch
VENDOR
‘ Alvin W. Holstein, Brentwood, Harry H. Pryor, St. Louis,
William H. Short, St.
and Arthur R. Kessler, St.
John, Mo., assignors toAnn,
Universal Match Corporation,
St. L '
ouls, Mo., a corporation of Delaware
Filed Apr. 6, 1964, Ser. No. 357,575
48 Claims. (Cl. 99-—289)
of coffee; the provision of a vendor such as described
which may also be used for brewing instant coffee, if de
sired; the provsion of a vendor such as described having
means for automatically ‘effecting thorough cleaning of
the coffee brewing and dispensing systems of the vendor
during off periods of use of the vendor; and the provison
This invention relates to beverage vendors, and more
of cleaning means such as described which automatically
particularly to coin-controlled machines for brewing and 10 comes
into operation if more than a predetermined period
vending coffee.
of time elapses after a vend cycle without a succeeding
In general, prior vendors for brewing and vending coffee
vend cycle of effect dumping of any brewed coffee re
have been of two types, the so-called single-cup brewer in
maining in the dispensing reservoir and cleaning and sani
which a single cup of coffee is brewed on each vend cycle
tizing of the coffee brewing and dispensing systems. Other
and delivered to a cup, and the so-called batch-brew type
in which a cup of brewed coffee is vended on each vend
cycle from a reservoir containing ‘a batch of brewed
objects and features will be in part apparent and in part
pointed out hereinafter.
The invention accordingly comprises the constructions
coffee, the supply of brewed coffee in the reservoir being
hereinafter described, the scope of the invention being
automatically replenished, when the level of brewed coffee 20 indicated
in the following claims.
in the reservoir is drawn down to a low level, by brewing
In the accompanying drawings, in which several of
a fresh batch and delivering it to the reservoir. One of
various possible embodiments of the invention are illus
the problems attendant upon the single-cup brewer is that
trated,
a relatively considerable amount of time is involved in
brewing a cup of coffee for delivery on each vend cycle. 25
While this problem is generally not involved in the batch
brew type of vender (where a cup of coffee may be quickly
FIG. 1 is a semidiagrammatic view of a. vendor of this
invention;
FIG. 2 is a transverse section of a brew unit ‘of the
vendor;
'
‘
delivered from the reservoir), the batch-brew vendor
FIG. 3 is a wiring diagram; presents another problem in that if brewed coffee remains
FIG. 4 is a chart showing the timing of operations dur
in the reservoir for any considerable length of time, it
ing a brew cycle;
loses its ?avor and should be dumped. In the usual prior
FIG. 5 is a chart showing the timing of operations dur
batch-brew type of vendor, where a relatively large quan~
ing a cleaning cycle;
tity of coffee is brewed on each brew cycle, a relatively
FIGS. 6-8 are ?ow diagrams; and
large quantity of brewed coffee may remain in the reservoir
FIG. 9 is a view illustrating a modi?cation.
for a relatively long period of time, and dumping of 35 Corresponding reference characters indicate corre
such relatively large quantities of brewed coffee from
sponding parts throughout the several views of the draw
time to time is wasteful.
ings.
Another problem attendant upon both the single-cup
Referring to FIG. 1 of the drawings, a vendor of this
and batch-brew types of vendors is the problem of main
invention for brewing and vending coffee is shown to
taining them in clean and sanitary condition, cleanliness 40 comprise two relatively small reservoirs or tanks 1 and
being essential for brewing and vending good coffee.
3. Reservoir 1 is adapted to receive brewed coffee from
Heretofore, cleaning of coffee vendors has been left
a brew unit designated in its entirety by the reference
to be carried out by the servicemen employed by the
character 5. Reservoir 1, which may therefore be re
operators of vending machine routes, and has been a time
ferred to as the receiver, is located above the reservoir
consuming operation, resulting in many instances in too 45 3, which may be referred to as the dispensing reservoir
infrequent thorough cleaning ‘with resultant vending of
or urn, for gravity flow of brewed coffee from the re
inferior coffee.
ceiver 1 to the dispensing reservoir 3. This flow is via a
Accordingly,‘ among the several objects of, this inven
conduit 7 under control of a solenoid valve 9, which
tion may be noted the provision of a vendor for brewing
may be referred to as the brew transfer valve. The dis~
and vending coffee, of a novel type which may be referred 50 pensing reservoir 3 has a bottom outlet connected by a
to as a small-batch-brew vendor, wherein a cup of coffee
length of plastic tubing 11 to the inlet of a three-way
is vended on each vend cycle from a relatively small
solenoid valve 13. This valve 13 has two outlets 15 and
batch, a three-cup batch, for example, as distinguished
17. Conduits 19 and 21 (plastic tubes, for example) ex
. from a relatively large batch (over twenty cups, for ex
tend from these outlets. Conduit 19 is for delivering
55
ample) thereby considerably reducing waste incurred on
brewed coffee in single-cup quantities from reservoir 3
dumping batches stored too long in the vendor; the pro
vision of a vendor such as described having a novel brewer
for brewing a small batch, using ground coffee dispensed
from a supply thereof, and adapted to brew good coffee
and deliver it to a dispensing reservoir in time to take care
of vending requirements; the provision of a brewer such
as described adapted to brew good coffee by forcing a
measured supply of hot water upward into a brew pot
which has been charged with a measured amount of
ground coffee, allowing the water to remain in the pot
with the ground coffee for a brew interval, and then forc
ing the resultant brewed coffee downward out of the pot
and delivering it to the dispensing reservoir system; and
delivering it to the dispensing reservoir system; the pro
vision of a brewer such as described adapted to uitilize
coffee ground from coffee beans,iwherein the water is
to a mixer 23 and thence to a cup C, under control of a
solenoid valve 25 shown as a pinch valve operable on
tubing 11 by pinching it and adapted to be opened and
closed for dispensing of a single cup of coffee from
reservoir 3 to the cup. Conduit 21 is for dumping coffee
from reservoir 3 into a waste can W. Valve 13, when
deenergized, blocks outlet 17 and opens outlet 15 to con
duit 19. For vending a cup of coffee from reservoir 3,
pinch valve 25 is opened for a timed interval, then
closed. Valve 13, when energized, blocks outlet 15 and
opens outlet 17 to direct flow of brewed coffee from
reservoir 3 through conduit 21 to the waste can. A cream
and sugar unit, which may be of any suitable well-known
type. is indicated at 27.
The brew unit 5, as illustrated, comprises a brew
pct 29 having a bottom 31, and being open at the top‘.
3,333,153
3
4
This has a capacity for brewing three cups of coffee, for
in the tank below level L is a closed water metering
vessel 77 having a capacity corresponding to the number
of cups to be brewed in the brew cup on each brew cycle.
For a three-cup brew as herein illustrated, vessel 77 has
example. It is mounted on the end of .a rocker arm 33
which extends generally radially from a horizontal rock
shaft 35. As shown'in FIG. 2, this shaft 35 is journalled
at its ends in the sides 37 of a U-shaped shaft support
39 mounted on a ?xed brew unit base 40. Shaft 35 is
adapted to be oscillated to swing arm 33 through an
angle of about 180“ between a brew position wherein
brew pct 29 is positioned upright as shown in solid lines
in FIG. 1 and a dump position wherein brew pot 29 is
inverted as shown in dotted lines in FIG. 1. For this pur
pose, shaft 35 has va pinion 41 ?xed thereon, adapted for
meshing engagement by either of two sector gears 43
a three-cup capacity. The vessel 77 has an_inlet at the
top ?tted with an annular valve seat 79. This seat 1s en
gageable by a valve 81 on a solenoid-operated valve stem
83, the solenoid for operating the valve being indicated
at 85. When the solenoid 85 is deenergized, valve 81 15
open for ?lling of vessel 77 with hot water from the
tank 75. When the solenoid is energized, valve 81 closes
to close off vessel 77 from the tank 7 5.
.
The measured quantity (three cups) of hot water 1n
vessel 77 is adapted to be forced out of the vessel and
and 45 ?xed on one face of a rotary disk 47. This disk
is ?xed on one end of the output shaft 49 of a gear 15 delivered to the brew pot by compressed air. For this
motor 51 adapted to rotate the disk at relatively low
speed (via speed-reducing gearing associated With the
motor). Shaft 49 extends horizontally parallel to shaft
purpose, there is provided an air compresser 87 driven
by an electric motor 89. An air conduit 91 extends from
the outlet of the compressor to a ?rst port of _a three
35, and disk 47 is located on the outside of one of the
way air control solenoid valve 93. An air condu1t_97 ex
sides 37 of the support 39. Motor 51 is mounted on a 20 tends from a second port of the valve 93 to an air inlet
port 99 for the vessel 77, and an air conduit 101 extends
bracket 53 carried by a vertical plate 55 extending up
from a third port of the valve 93 to a port 103 in the brew
from the brew unit base 40. Shaft 49 extends through
pot lid 59. This conduit 101 is ?exible to permit swing
and is journalled in plate 55 at 57.
ing of the lid. A conduit 105 (which, as will appear, is
‘Disk 47 is adapted to be driven clockwise by motor
51 as viewed in FIG. 1. During each brew cycle, disk 25 for both water and air) extends from an outlet 107 of
the vessel 77 to the inlet port of a three-way solenoid
47 is rotated through a single revolution, starting and
valve 109. A conduit 111 interconnects a ?rst outlet port
ending in the home position shown in FIG. 1. When
of valve 109 and a ?rst port of a three-way solenoid valve
the disk has rotated clockwise about 225° from its home
113. A conduit 115 interconnects a second port of valve
position, sector gear 43 comes into mesh with pinion 41
113 to the inlet of a three-way solenoid valve 117. A
on the outside of the latter and rotates pinion 41 and
shaft 35 clockwise as viewed in FIG. 1 to swing the
conduit 119 interconnects a transfer port of valve 117
brew pot 39 over clockwise from its upright brew posi
tion to its inverted dump position. When the disk has
rotated about 320° from its home position, sector gear
and a port in the bottom of brew pot 29. Conduit 119 is
?exible to permit swinging of the brew pot. A condu1t
121 having a cartridge 123 of a suitable cleaning agent
45 comes into mesh with pinion 41 on the inside of the
latter and rotates pinion 41 and shaft 35 counterclock
wise as viewed in FIG. 1 to return the brew pot to its
therein (such as that sold under the trade name Calgon,
for example) is connected between a second outlet port
of valve 109 and a third port of valve 113. A conduit
upright brew position.
125 extends from an outlet port of valve 117 to the re
ceiver 1.
Valve 93, when deenergized, connects conduits 91 and
A lid 59 is provided for closing the top of the brew
pot with a tight seal when the latter is in its upright
brew position. This lid is mounted on a rock shaft 61
journalled at its ends in sides 37 of shaft support 39.
Shaft 61 carries a pinion 63 engageable by sector gears
97 and blocks conduit 101 (see FIGS. 6 and 8). Valve
93, when energized, connects conduits 91 and 101 and
blocks conduit 97 (see FIG. 7). Valve 109, when de
65 and 67 on arms 65a and 67a extending radially out
energized, connects conduits 105 and 111 and blocks con
ward from disk 47. These sector gears are phased so 45 duit 121 (see FIGS. 6 and 7). Valve 109, when ener
that, when disk 47 has rotated through about 30° from
gized, connects conduits 105 and 121 and blocks con
its home position, sector gear 65 engages pinion 63 on
duit 111 (see FIG. 8). Valve 113, when deenergized,
the outside of the latter and swings shaft 61 and lid
connects conduits 111 and 115 and blocks conduit 121
59 clockwise as viewed in FIG. 1 to close the lid. This
(see FIGS. 6 and 7). Valve 113, when energized, con
occurs with the brew pot in its upright position. Then, 50 nects conduits 121 and 115 and blocks conduit 111 (see
after disk has rotated about 195° from its home posi
FIG. 8). Valve 117, when deenergized, connects con
tion, sector .gear 67 engages pinion 63 on the inside of
duits 115 and 119 and blocks conduit 125 (see FIGS. 6
the latter and swings shaft 61 and lid 59 counterclock
and 8). Valve 117, when energized, connects conduits
wise to open the lid. This occurs before the brew pot
119 and 125 and blocks conduit 115 (see FIG. 7).
swings to its dump position. A latch such as indicated 55
Now referring to FIG. 3, which illustrates the elec
at 68 may be provided to latch the lid in closed posi
trical circuitry of the vendor, reference characters L1
tion.
and L2 designate main power lines adapted to be plugged
Brew pot 29 has a ?lter screen 69 mounted therein
into a power outlet, VP generally designates a vend
adjacent its bottom. Mounted above the brew unit 5 is
programmer, BP generally designates a brew cycle pro
a hopper 71 for ground coffee, having a solenoid-actuated 60 grammer, and CP generally designates a cleaning cycle
ground coffee dispenser 73 of any suitable well-known
programmed.
type adapted on energization to dispense a metered
The vend programmer VP comprises a vend pro
amount of ground coffee appropriate for brewing three
grammer motor 131 and three switches controlled by cams
cups of coffee. Dispensing of the ground coffee occurs
on a cam shaft 133 driven by this motor. These switches
when the brew pot 29 is in its upright brew position and 65 are designated S1, S2 and S211 and the respective cams are
lid 59 is open, the ground coffee dispensed from the
designated C1, C2 and C2a. Cam C1 and switch S1
hopper 71 dropping into the brew pot onto the ?lter
(which is a double-throw switch) control the motor 131.
screen 69 (which is of sufficiently ?ne mesh to retain
Cam C2 and switch S2 (which is a single-throw switch)
the ground coffee).
control the brewed-coffee-dispensing pinch valve 25. The
Hot water for brewing coffee in the brew pot 29 is 70 function of cam C2a and switch S2a will be described
supplied from a hot water tank 75. This is maintained
later. A pushbutton vend switch is indicated at VS. A
?lled with water to a level such as indicated at L, and
vend relay is indicated at VR, having two sets of nor
the water is maintained heated to relatively high tem—
mally open contacts 137 and 139.
perature (short of boiling) by any of suitable means for
The brew cycle programmer BP comprises a brew
this purpose well known in the art. Suitably mounted
cycle programmer motor 141 and a series of switches
5
3,838,153
controlled by cams on a cam shaft 142 driven by the
motor. These switches are designated S3, S4, S5, S6, S7,
S8 and S9, and the respective cams are designated C3, C4,
6
termined period of elapsed time from zero, four hours
as herein illustrated, and to effect closure of switch 171
and closure of switch 169 on its lower contact upon
elapse of this period of time from zero. Cam C12 and
switch S12 control valves 109 and 113. Cam C13 and
switch S13 control the solenoid 85 of the metering vessel
relay AR via contacts 143 and 144, respectively. Cam
valve 81. Cam C14 and switch S14 control the brew unit
C4 and switch S4 control the solenoid-operated ground
motor 51. Cam C15 and switch S15 control the air corn
coffee dispenser 73. Cam C5 and switch S5 control the
pressor motor 89. Cam C16 and switch S16 control the
solenoid 85 of the metering vessel valve 81. Cam C6 and 10 solenoid valves 93 and 117. Cam C17 and switch S17
switch S6 constitute a ?rst control for the brew unit
control the transfer valve 9. Cam C18 and switch S18 con
motor 51. Cam C7 and switch S7 control the solenoid
trol the pinch valve 25. Cam C19 and switch S19 control
valves 93 and 117. Cam C8 and switch S8 control air
the three-way solenoid valve 13. Switches S11-S19 are
compressor 'motor' 89. Cam C9 and switch S9 constitute
all single-throw switches. A so-called shut-down hold relay
a second control for the brew unit motor 51.
.
15 is indicated at HR, having 'a set of normally open con
The output shaft 49 of the brew unit motor 51 carries
tacts HRl and two sets of normally closed contacts HR2
a cam 145 which operates a control switch 147 for the
and HR3.
brew unit motor 51. Cam 145 is designed to hold switch
As shown in FIG. 3, coin switch CS has its movable
147 open for somewhat less than the ?rst 110° of rotation
contactor connected to line L1 and its normally open
of the cam, and then effects closure of switch 147 until 20 lower contact connected by a line 181 to the upper termi
the cam returns to home position whereupon the switch
nal of the coil of vend relay VR. The lower terminal of
opens. A brew programmer relay is indicated at BR hav
this coil is connected by a line 183 to the normally closed
ing two sets of normally closed contacts 149 and 150.
upper contact of double-throw switch S1, and the movable
These contacts open when the coil of relay BR is ener
contaetor of this switch S1 is connected by a line 185 to
gized. A transfer relay is indicated at TR, having three 25 line L2. One terminal of vend programmer motor 131 is
sets of contacts 151, 152 and 153. Contacts 151 are nor
connected by a line 187 to line L1, and its other terminal
mally open; contacts 152 are normally closed. Contacts
is interconnected with the lower normally open terminal
153 constitute a double-throw switch, normally closed
of switch S1 by a line 189 which includes the normally
on the lower contact thereof as shown in FIG. 3. Switch
open upper contacts of switch 153 of transfer relay TR.
82a, which is a normally open single-throw switch, is 30 Vend switch VS and contacts 137 of the vend relay VR are
connected in a line 158 between the lowercontact of
connected in series in a line 191 interconnecting lines L2
switch 153 and line L2. A coin switch is indicated at CS.
and 189. Contacts 139 of the vend relay are connected as
This is a double-throw switch normally closed on an
indicated at 193 between line 187 and the upper terminal
upper contact as shown, and closing on a lower contact
of the coil of vend relay VR. Switch S2 and pinch valve
upon deposit of a coin. A testswitch is indicated at 159. 35 25 are connected in a series circuit 195 across lines L1
Three electrodes E1, E2 and E3 extend down into the
and L2.
dispensing reservoir 3. Electrode E1 is a relatively short
Whenever a purchaser deposits coin in sufficient amount
electrode, adapted to detect ?lling of reservoir 3 with
to close coin switch CS on its lower contact, vend relay
C5, C6, C7, C8 and C9. Switch S3 has two sets of nor
mally open contacts 143vand 144. Cam C3 and switch S3
control the motor 141 and a so-called automatic cycle
brewed coffee to the three-cup level. That is, the lower end
VR is energized via line 181, line 183, switch S1 (closed
of electrode E1 is at the three-cup level in reservoir 3. 40 on its upper contact) and line 185. Vend relay contacts
Electrode E2 is an intermediate length electrode, adapted
137 and 139 thereupon close. Closure of coin switch CS
to detect drawing off of a second cup of coffee from reser
voir 3. Electrode E3 is a relatively long electrode, adapted
to detect the drawing off of a third cup of coffee from
reservoir 3. Electrodes E1 and E3 are adapted to con
trol the transfer valve 9 as will appear, for closing this
valve when the level of coffee rises to the level of the
on its lower contact may be momentary, but contacts 139
set up a holding circuit for the vend relay via lines 187,
193, 183, switch S1 (closed on its upper contact) and
45 line 185. The purchaser may now obtain a cup of coffee
from reservoir 3 by pushing vend switch VS, even though‘
coin switch CS has closed back on its upper contact. The
result of closure of vend switch VS is to complete a cir
cuit for vend programmer motor 131 via line 187, line
the lower end of electrode E3 on‘ drawing off the third 50 189 and line 191 (switches VS and contacts 137 being
cup of coffee from reservoir 3. Electrode E2 is a trigger
closed). This starts motor 131 in operation to drive cams
for initiating a brew cycle.
C1 and C2. Cam C1 is designed to close switch S1 on its
lower end of electrode E1 (the three-cup level) and for
opening this valve‘when the level of coffee drops below
The cleaning cycle programmer CP comprises a motor
161 and a series of switches controlled by cams on a cam
shaft 163 driven by the motor. The switches are designated
S10, S11, S12, S13, S14, S15, S16, S17, S18 and S19, and
the respective cams are designated C10, C11, C12, C13,
C14, C15, C16, C17, C18 and C19. Cam C10 and switch
S10 (which is a double-pole double-throw switch) con
lower contact immediately after the motor 131 ‘starts, and
this sets up a holding circuit for the motor via lines 187,
189 and 185 (assuming that switch 153 of transfer relay
TR is closed on its upper contact). The motor is held in
operation until cam C1 has completed a revolution and
thrown switch S1 back on its upper contact. Cam C2,
rotating with C1, closes switch S2 to energize and open
trol the motor 161 and a coin return electromagnet, the 60 the pinch valve 25. Cam C2 is designed to open pinch
coil of which is indicated at 165. Cam C11 and switch
valve 25 for a time interval such as to allow one cup of
S11 control a timer generally designated T, which com
coffee to drain out of reservoir 3, and then to shut it off.
prises a timer motor 167 and a pair of switches 169 and
Reservoir 3 is connected to ground as indicated at 197.
171 controlled by a cam 173 on a cam shaft 175 driven
Electrode E1 is interconnected with the lower terminal of
by the motor via a zero reset clutch mechanism operated 65 the coil of the transfer relay TR by a line 199. This coil
is connected in a circuit powered off the secondary of a
by a coil 176. Switch 171 is a single-throw normally open
transformer 201. The primary of this transformer has one
switch; switch 169 is a double-throw switch normally
terminal connected to line L1 as shown, and its other
closed on its upper contact. The timer is of a known type
terminal connected to line L2 by a line 203. The coil of
in which, the motor 167 being continuously energized,
cam 173 is continuously driven to register elapsed time 70 brew programmer relay BR is connected in series with the
secondary of the transformer and electrode E2 in a line
from zero, but is reset back to zero at any time that reset
205 connected to one terminal of the secondary of the
coil 176 is energized to release the reset clutch mecha
transformer, the other terminal of the latter being
nism. Cam 173 is designed to hold switch 171 open and
grounded as indicated at 207. Line 199 including electrode
to hold switch 169 on its upper contact for a prede
75 E1 and the coil of relay TR is connected to line 205.
3,333,153
7
Contacts 151 of relay TR are interconnected with elec
trode E3 in a line 209 connected to line 199. Contacts
152 of relay TR are series-connected with the sole
noid transfer valve 9 between lines L1 and L2 via a
line 211. Valve 9 is normally closed (i.e., closed when
deenergized), and opens on being energized. Brew pro
grammer motor 141 is connected in a motor circuit 213
including contacts HR2 of shut-down hold relay HR, con
tacts 149 of brew programmer relay BR and normally
closed upper contacts 214 of the automatic cycle relay 10
8
Contacts 171 of timer T are connected in series with
cleaning cycle programmer motor 161 across lines L1
and L2 in a circuit indicated at 237. This circuit is com
pleted on closure of contacts 171 upon operation of timer
T for four hours without reset. A line 239 feeds each of
switches S10-S19 from line L1 via line 237. Coin return
electromagnet 165 is connected in series with the upper
normally closed contacts of switch S10 in a line 241 be
tween line 223 and the upper contact of switch 169. A
line 243 interconnects the lower contact of switch S10
and line 237 to provide a holding circuit for motor 161.
AR. Contacts HR2 being normally closed, this motor
Cam C10 is designed to cause switch S10 to drop off
circuit is completed when brew programmer relay BR is
its upper coin return electromagnet contact and close
deenergized (contacts 149 then being closed) and when
on its lower holding circuit contact immediately after
relay AR is deenergized (contacts 214 then being closed).
A line 215 interconnects line L1 and one terminal of each 15 motor 161 starts, to hold motor 161 in operation until
cam C10 has completed a revolution, thereby effecting
of switches 83-89. The coil of relay AR is interconnected
rotation of cam shaft 163 and the cams thereon through
with contacts 144 of switch S3 in a circuit indicated at
a one-revolution cycle, which as herein illustrated takes
216. A line 217 including normally open contacts 218
300 seconds.
of relay AR and normally closedcontacts 150 of relay
Switch S11 is connected across lines L1 and L2 in series
BR interconnects line L1 and circuit 216. Contacts 143 20
with timer reset coil 176 via a line 245 connected to line
of switch S3 are connected in a holding circuit 219 for
203. Switch S12 is connected in a line 247 leading to
motor 141. Cam C3 is designed to actuate switch S3 im
parallel branch lines 249 and 251 including solenoid
mediately after motor 141 starts to close contacts 143
valves 109 and 113-, lines 249 and 251 being shown as
and open contacts 144, and this completes holding circuit
219. The motor 141 is then held in operation until cam 25 connected to line 223. Switch S13 is connected in a line
253 for energizing solenoid 85 on closure of switch S13.
C3 has completed a revolution and opened switch S3,
Switch S14 is connected in a line 255 for energizing brew
thereby effecting rotation of cam shaft 142 and the
unit motor 51 on closure of switch S14. Switch S15 is
cams thereon through a one-revolution cycle, which, as
connected in a line 257 for energizing ‘air compressor
herein illustrated, takes twenty-?ve seconds. Test switch
159 is connected in a line 220 between lines L1 and 219 30 motor 89 on closure of switch S15. Switch S16 is con
nected in a line 259 for energizing solenoid valves 93
to shunt switch S3 for manually operating motor 141 at
and 117 on closure of switch S16. Switch S17 is connected
any time.
in a line 261 for energizing the transfer valve 9 on closure
Switch S4 is connected in series with the solenoid-oper
of switch S17. Switch S18 is connected in a line 263
ated ground coffee dispenser 73 across lines L1 and
35 leading to line 211 for energizing pinch valve 25 on
L2 via line 215 and a line 221. Switch S5 is connected in
closure of switch S18. Switch S19 is connected in a line
series with the solenoid 85 of the metering vessel valve
265 for energizing dump valve 13 on closure of switch
81 across lines L1 and L2 via line 215 and a line 223.
S19.
Switch S6 is connected in series with brew unit motor
Cams C10-C19 are designed to effect timing of op
51 across lines L1 and L2 via line 215, a line 225 and 40
erations during a cleaning cycle as shown in the FIG.
line 203. Switch S7 is connected in a line 227 leading to
5 chart. This chart shows timing on the basis of a 300
parallel branch lines 229 and 231 including solenoid
second cleaning cycle. As appears from the chart, cam
valves 93 and 117, lines 229 and 231 being shown as con
C10 throws switch S10 to close holding circuit 243 at
nected to line 223. Switch S8 is connected in series with
air compressor motor 89 in a line 233 shown as con 45 approximately 0 second and holds it closed for about 297
seconds to effect rotation of cam shaft 163 through a
nected to line 223. Switch S9 is connected in series with
single revolution for timing a 300 second cleaning cycle.
control switch 147 for motor 51 in a line 235 connected
Cam C11 closes switch S11 approximately at 0 second
to line 225.
of elapsed time and holds it closed for about 5 seconds.
Cams C3-C9 are designed to operate switches 83-39
to effect timing of operations during a brew cycle as 50 Cam C12 closes switch S12 at 15 seconds of elapsed
time and holds it closed until the 30th second. Cam C13
shown in the FIG. 4 chart. This chart shows timing on
closes switch S13 at 15 seconds of elapsed time, opens
the basis of a twenty-?ve second :brew cycle. As appears
it at 80 seconds, closes it again at 165 seconds, and opens
from the chart, cam C3‘actuates switch S3 slightly after
it at 230 seconds. Cam C14 closes switch S14 at approxi
0 second and holds it with contacts 143 closed and con
tacts 144 open until slightly before 2.5 seconds to effect 55 mately 0 second, opens it at 2 seconds, closes it again at
285 seconds, and opens it at 2891/2 seconds. Cam C15
rotation of cam shaft 142 through a single revolution for
closes switch S15 at 20 seconds, opens it at 80 seconds,
timing a twenty-?ve second brew cycle. Cam C4 closes
closes it again at 170 seconds, and opens it at 230 sec
switch S4 at 1 second of elapsed time and holds it closed
onds. Cam C16 closes switch S16 at 65 seconds, opens
until the 6th second to effect energization of solenoid
operated dispenser 73 to dispense ground coffee from 60 it at 80 seconds, closes it again at 215 seconds, and opens
it at 230 seconds. Cam C17 closes switch S17 at approxi
hopper 71 in measured amount for brewing a three-cup
mately 0 second, opens it at 15 seconds, closes it again
batch of coffee. Cam C5 closes switch S5 at 2% seconds
at 105 seconds, opens it at.145 seconds, closes it again
of elapsed time to energize the solenoid 85 of the meter
at 255 seconds, and opens it at 295 seconds. Cam C18
ing vessel valve 81 and holds it closed until the 13th sec
ond for metering a measured amount of hot water from 65 closes switch S18 at approximately 0 second, opens it
at 15 seconds, closes it again at 130 seconds, opens it
the hot water tank 75 to the brew pot as will appear. Cam
at 145 seconds, closes it again at 280 seconds, and opens
C6 closes switch S6 at 2% seconds of elapsed time and
it at 295 seconds. Cam C19 closes switch S19 at aproxi
holds it closed for two seconds. Cam C7 closes switch
mately 0 second, opens it at 15 seconds, closes it again
S7 at 13 seconds of elapsed time and holds it closed until
the 19th second. Cam C8 closes switch S8 at 3 seconds of 70 at 130 seconds, opens it at 145 seconds, closes it again
at 280 seconds, and opens it at 295 seconds (the same as
elapsed time and holds it closed until the 19th second.
the operation of cam C18 on switch S18).
Cam C9 initially holds switch S9 closed, opens it at 1
Contacts HR1 of the shut-down hold relay HR are
second of elapsed time, closes it at 191/2 seconds, and
connected in a line 267 between the upper contact of
holds it closed until the 1st second of the next brew
75. the coin switch CS and the lower contact of timer switch
cycle.
9
3,338,153
169. The coil of relay HR is connected between lines
10
3 is drawn down to the two-cup level and falls below the
203 and 267 as indicated at 269. At 271 is indicated a
lower end of electrode E1, but this has no immediate
line which interconnects lines 245 and 263. Contacts
effect on operations. The next time a purchaser deposits
HR3 of the shut-down hold relay and timer motor 167
coin in appropriate amount vand operates vend switch
are series-connected between lines L1 and L2 via a line
VS to buy a cup of coffee, the above-described vend cycle
273 connected between line L1 and line 203.
is repeated, and on this second vend, the level of brewed
Operation is as follows:
coffee in reservoir 3 is drawn down below the lower end
For purposes of describing the operation of the vendor,
of electrode E2 (i.e., drawn down to the one-cup‘ level).
it will be assumed that the dispensing reservoir or urn
When electrode E2 is exposed, a brew cycle is initiated.
3 contains three cups of brewed coffee, ready to be
Exposure of electrode E2 opens line 205 to deenergize
vended, that hot water. tank 75 is ?lled to the level L 10 the brew programmer relay BR, resulting in closure of
with hot water, that metering vessel 77 holds three cups
contacts 149 and 1:50 of this relay. With relay HR de
of hot water, having been ?lled from the tank 75, and
energized at this time and its contacts HR2 closed, and
that less than four hours has lapsed since the previous
with relay AR deenergized at this time and its contacts
.vend. With reservoir 3 full of coffe e, relays BR and TR 15 214 closed, circuit 213 for brew programmer motor 141
are energized. Contacts 149 and 150 of relay BR there- ~
is completed to trigger off a brew cycle.
fore are open. Contacts 151 of relay TR are therefore
Upon energization of the brew programmer motor
closed; contacts 152 are open; and switch 153 of relay
141, operation of cam shaft 142 through its 25 second
TR is closed on its upper contact.
single-revolution cycle is initiated. As soon as motor 141
On deposit of coin in appropriate amounts by a pur 20 starts, cam C3 actuates switch S3 to close its contacts
chaser, coin switch CS is momentarily closed on its
143 and 144. This has two results: it completes holding
lower contact. This results in energization of the vend re
circuit 219‘ for motor 141 via closed contacts 143 and
lay VR via lines 181 and 183, switch S1 (which is closed
energizes relay AR via circuit 216 including closed con
on its upper contact at this time) and line 185. Contacts
tacts 144. Contacts 214 then open, and contacts 218
137 and 139 of relay VR close. Contacts 139 thereupon 25 close to set up a holding circuit for relay AR via line 217
establish a holding circuit for relay VR via line 187,
including closed contacts 150 of relay BR. The motor
line 193, contacts 139, line 183, switch S1 and line 185.
141 is held in operation until the cam shaft 142 has com
This holds relay VR energized to allow time for the
pleted a revolution, whereupon switch S3 is thrown back
purchaser to operate vend switch VS after having de
to its initial position to open contacts 143 and 144. Open
posited his coin.
30 ing of contacts 143 deenergizes motor 141. At 1 ‘second
On operation of vend switch VS by the purchaser, a
of elapsed time from the start of motor 141, cam C4
circuit for the vend programmer motor 131 is completed
closes 'switch S4 and maintains it closed for ?ve seconds.
via line 187, line 189 and line 191 (including closed con
With switch S4 closed, the solenoid-operated ground
tacts 137 of relay VR), and motor 131 is thereby set
coffee dispenser 73 is energized via line 221, and ground
in operation to drive cam shaft 133 through a single
coffee is dispensed from hopper 71 in measured amount
revolution. Shortly after motor 131 starts, cam C1 causes
for brewing a three-cup batch of coffee. The brew pot
switch S1 to open off its upper contact and close on its
29 is in its upright brew position at this time, and its
lower contact. This breaks the holding circuit for relay
lid 59 is open, as shown in solid lines in FIG.v 1. The
VR, and its contacts 137 and 139 open. Transfer relay
ground coffee drops into the brew pot, falling on to the
TR, as above noted, is energized at this time, and the
?lter screen 69 adjacent the bottom of the pot.
switch 153 is therefore closed on its upper contacts. When
Following the initiation of operation of the ground
switch S1 closes on its lower contact, a holding circuit
coffee dispenser 73 to dispense ground coffee into the
for motor 131 is established via line 187, line 189, the
brew pot, switches S5 and S6 are closed simultaneously
upper contacts of switch 153, switch S1 (closed on its
(at 2% seconds of elapsed time from the start of the
lower contact) and line 185. The motor 131 is thereby 45 brew cycle) by cams C5 and C6. On closure of switch
held in operation until cam C1 has thrown switch S1 back
S5, a circuit for solenoid 85 is completed via line 223,
on its upper contact at the completion of a revolution of
and this solenoid closes the valve 81 to close off the
cam shaft 133, and is then deenergized.
water metering vessel 77 from communication with the
During the rotation of cam shaft 133 through a revolu
hot water tank 75, and holds it closed until the 13th
tion as above described, cam C2, effects closure of switch 50 second of elapsed brew cycle time. On closure of switch
S2 to energize pinch valve 25 via line 195 and hold valve
S6, a circuit for brew unit motor 51 is completed via line
25 open for a time interval such as to allow one cup of
225, and is held for two seconds by the cam C6. Motor
coffee to drain out of reservoir 3 via valve 13 (deenergized
51 thereupon rotates disk 47 (and cam 145 for two
at this time) and ?ow through conduit 19 to the mixer 23
seconds) through an angle of about 110° from the home
and thence to the cup C. It will be understood that the 55 position of the disk in which it is shown in solid lines
vendor will include a suitable cup dispenser of well-known
in FIG. 1 and stops. As the disk rotates through this ini
type for dispensing a cup into position below mixer 23
tial 110° of a revolution, sector ‘gear 65 comes into mesh.
on each vend cycle.
with pinion 63 on the rock shaft 61 which carries the
Up to‘ the time that switch S2 is closed by cam C2,
brew pot lid 59, and this rotates shaft 61 to close the
the motor 167 of timer T is continuously energized to 60 lid and latch it closed. The dotted-line position of the
drive the timer cam 173, via line 273 including the nor
lid shown in FIG. 1 is its closed position. Closure of
mally closed contacts HR3 of relay HR (which is de
the lid occurs after dispensing of ground coffee into the
pot.
energized at this time) and line 203. Motor 167 drives
At 3 seconds of elapsed brew cycle time, cam C8 of‘
timer cam 173 through the zero reset mechanism includ
ing reset coil 176. When switch S2 closes, coil 176 is ener 65 fects closure of switch S8, and holds it closed until the
19th second of elapsed brew cycle time. On closure of
gized, a circuit therefor being completed from line L1 to
switch S8, a circuit for air compressor motor 89 is com~
line L2 via line 187, line 195 (in which switch S2 is
pleted via line 233. Motor 89 thereupon drives air com~
closed), line 263, line 271, line 245, and line 203. This
pressor 87 to supply compressed air to conduit 91.
resets the timer cam 173 to zero, and such reset of the
Valves 93, 109, 113 and 117 are all deenergized at
timer cam to zero occurs each time vend switch VS is 70
operated by a purchaser after deposit of coin to buy a
cup of coffee.
this time. Accordingly, compressed air is delivered via
conduit 91, valve 93 and conduit 97 to the metering ves
sel 77, and forces the three cups of hot water in vessel
When the ?rst cup of coffee is dispensed from reservoir
77 out through conduit 105, valve 109, conduit 111, valve
3 as above noted, the level of brewed coffee in reservoir 75 113, conduit 115, valve 117 and conduit 119 to the brew
3,333,153
11
pot 29 (see FIG. 6). The hot water enters the brew pot
through the bottom 31 of the pot, and rises up through
the ?lter screen 69 into the brew pot for brewing a three
cup batch of coffee in the pot. Line 121 is blocked off
at valves 109 and 113 so that the water does not by-pass
12
closure of contacts 151, raising of switch 153 and open
ing of contacts 152. This conditions the system ‘for pro
ceeding through another brew cycle when the next two
cups of coffee are dispensed from reservoir 3.
From the above, it will be observed that vending op
erations may be considered as starting with three cups
of brewed coffee in reservoir 3. On the ?rst vend (effected
by the deposit of coin in appropriate amount and opera
tion of vend switch VS by a purchaser), the level of
mg.
At 13 seconds of elapsed brew cycle time, cam C7 10 coffee in reservoir 3 is drawn down to the two-cup level.
On the second vend, the level is drawn down to the one
effects closure of switch S7, and holds it closed until the
cup level, and on the third vend, reservoir 3 is emptied.
19th second of elapsed brew cycle time. On closure of
For replenishing the supply of brewed coffee in reservoir
switch S7, solenoid valves 93 and 117 are energized via
3, a brew cycle is initiated when the level of coffee in
lines 227, 229, 231 and 223. With valves 93 and 117
energized, compressed air is delivered via conduit 91 15 reservoir 3 is drawn down below the lower end of elec
through the cleaning agent cartridge 123. Delivery of the
hot water to the pot is followed by delivery of air to
effect agitation of the brew in the pot for effective brew
(the air compressor motor 89 remaining in operation
until the 19th second of elapsed time) through valve 93
trode E2, i.e., during the vending of the second cup of
coffee (and before the vending of the third cup). During
At 191/2 seconds of elapsed brew cycle time, cam C9
run, and this triggers off a cleaning cycle. On completion
closes switch S9 and holds it closed. Prior to closure of
switch S9, brew unit motor 51 has rotated shaft 49
of a four-hour run of the timer, timer cam 173 effects
closure of switch 169 on its lower contact and closure of
the brew cycle, a ‘fresh three-cup batch of coffee is
to conduit ‘101 and thence into the top of the brew pot
brewed and delivered to reservoir 1. This batch remains
29 to force the brewed three-cup batch of coffee down
ward out of the pot through conduit 119, valve 117, ‘and 20 in reservoir 1 until the last cup (the third cup) in reser
voir 3 is vended. Then, transfer valve 9 opens to deliver
conduit 125 (see FIG. 7) to the receiving reservoir 1,
the fresh batch to reservoir 3. By this time, the last cup
wherein it is held since transfer valve 9 is deenergized
of the previous batch in reservoir 3 has drained out, and
and hence closed at this time.
pinch valve 25 has closed to hold the fresh three-cup
It will be observed that some ten seconds of time
batch in reservoir 3. Now, vending may continue from
elapse between the start of delivery of hot water to the
reservoir 3. Each time the level of coffee in reservoir 3
brew pot 29 and the start of delivery of compressed air
is drawn down, the vendor operates through a brew cycle
to the top of the brew pot to discharge brewed coffee
as above described to recharge reservoir 3 with a three
from the pot. Thus, an interval of about ten seconds is
cup batch. Brewing of the batch and delivery to the
provided for infusion of the ground coffee in the hot
water in the pot, while agitating the brew by means of 30 reservoir 3 occurs while vending is proceeding, so that
there is no delay and purchasers do not have to wait for
air, for brewing three cups of coffee in the pot. When
coffee to be brewed.
the brewed coffee is forced downward out of the pot by
As has been noted, timer T starts timing out a new
compressed air delivered to the top of the pot, the spent
four-hour interval on each vend. If four hours should
coffee grounds are ?ltered out by the screen 69 and remain
elapse wtihout a vend, the timer completes its four-hour
thereon.
switch 171.
Upon closure of switch 169 on its lower contact, coin
a circuit for motor 51 via line 235 (switch 147 being 40
return electromagnet 165 is deenergized (having the effect
closed) and line 225, and holds it so that motor 51
of returning any subsequently deposited coins to a cus
completes the rotation of the disk 47 through 250° back
through 110°, and switch 147 is closed. This establishes
tomer until it is reenergized). Relay HR and cleaning
to its FIG. 1 home position. During this ?nal phase of
cycle programmer motor 161 are energized via lines 269
rotation of the disk, sector gear 67 meshes with pinion
63 and swings the brew pot lid 59 open. Then, sector 45 and 267, switch 169, switch 171 and line 237. Contacts
HR2 and HR3 of relay HR open, and contacts HR1 of
gear 43 meshes with pinion 41 and swings the brew pot
relay HR close. Opening of contacts HR2 breaks the
29 over from its upright brew position to its inverted
dumping position to dump the spent coffee ground into
the waste can W. Finally, sector gear 45 meshes with
circuit 213 to the brew programmer motor 141 to hold
this out of operation during the cleaning cycle. Opening
pinion 41 and swings the brew pot back to its brew posi 50 of contacts HR3 breaks the circuit 273 for the timer
motor 167 to hold this out of operation during the clean
tion, and then disk 47 terminates its rotation back at its
ing cycle. Closure of contacts HR1 establishes a hold
home position. This occurs due to opening of switch 147
ing circuit for relay HR via coin switch CS (closed on
by cam 145.
its upper contact) and lines 269 and 203. Coin switch
The next time a purchaser deposits coin in appropriate
amount and operates vend switch VS to buy a cup of 55 CS remains closed on its upper contact throughout the
coffee, the above-described vend cycle is repeated a third
time, and on this third vend, the level of brewed coffee
in reservoir 3 is drawn down below the lower end of
electrode E3 (i.e., drawn down below the one-cup level).
cleaning cycle because coin return electromagnet 165
remains deenergized‘throughout the cleaning cycle, pre
venting any coins that may be deposited during the clean
ing cycle from reaching the coin switch.
The immediate effects of this is that the circuit 209 for 60
As noted above, closure of switch 171 completes cir
cuit 237 for cleaning cycle programmer motor 161 to
the coil of transfer relay TR is opened to deenergize relay
start the latter in operation to drive cam shaft 163 and
TR, resulting in opening of the TR relay contacts 151,
cams C10-C19 through the 300 second single-revolution
closing of the TR relay contacts 152, and dropping of
cycle thereof. As soon as motor 161 starts, cam C10
switch 153. Upon closure of contacts 152, transfer valve
9 is energized to open it via line 211, and the three-cup 65 effects closure of switch S10 on its lower contact to com
plete the holding circuit 243, 237 for the motor to hold
batch of brewed coffee in reservoir 1 drains down into
reservoir 3.
As the reservoir 3 ?lls with brewed coffee from reser
voir 1 through the opened transfer valve 9, and when
the level of coffee in reservoir 3 reaches electrode E2,
brew programmer relay BR is re-energized via line 205,
opening contacts 149. This places an additional break
in ‘the circuit 213 for brew programmer motor 141. When
the level of coffee in reservoir 3 reaches electrode E1, the
7 transfer relay TR is energized via line 199, resulting in 75
it in operation until cam shaft 163 has completed a revolu
tion. Switch S10, in closing on its lower contact, opens
off its upper contact, and this further deenergizes coin
return electromagnet 165 which, as will be understood,
has the effect of rejecting deposited coins until relay 165
is re-energized at the termination of a cleaning cycle.
Also immediately upon the starting of motor 161,
cam C11 closes switch S11 for about 5 seconds to energize
coil 176 to reset the timer cam 173 to zero. This occurs
3,338,153
13
via lines ‘245 and 203. Cam C17 closes switch s17 to
energize the transfer valve 9 via lines 261 and 211 to
open this valve and hold it open for 15 seconds. Cam
C18 closes switch S18 to energize the pinch valve 25
via lines 263 and 195 and to hold it open for 15 seconds.
Cam C19 closes switch S19 to energize valve 13 via line
265 and to hold it energized for 15 seconds. As a result
of opening of valves 9 and 25 and energization of valve
‘14
The boil-out interval for the reservoir 1 ‘terminates at
105 seconds of elapsed cleaning cycle time, at which time
cam C17 recloses switch S17 to 'reenergize the transfer
valve 9, holding it open until the 145th second of elapsed
time. The solution in reservoir 1 thereupon drains down
into reservoir 3, wherein it is held for a boil-out interval
since pinch valve 25 is deenergized and closed. The boil
out interval for reservoir 3 terminates at 130 seconds of
13, anybrewed coffee in reservoirs 1 and 3 (which co?ee,
elapsed time, at which time cams C18 and C19 close
after four‘ hours, has lost its ?avor) drains out. of the 10 switches S18 and S19 to energize the pinch valve 25' and
reservoirs and ?ows through conduit 21 to the waste
the three-way solenoid valve 13, holding valve 25 open
fcan W.‘ Cam C14 closes switch S14 to energize the motor
and holding valve 13 in its setting for discharge through
51 via lines 255 and 225. Switch S14 is held closed for
conduit 21 to the waste can W. The solution in reservoir
2'Seco11'ds, which results in operation of motor 51 to
3 thereupon drains out into the ‘waste can.
rotate disk 47 through 110° to close the brew pot lid 59. 15 _ With the dumping of the cleaning solution from reser
' At 15 seconds of elapsed cleaning cycle time from the
voir 3, what may be termed the wash phase of the clean
start of motor 161, cam C12 closes switch S12 to energize
ing cycle is terminated, and there follows what may be
valves 109 and 113 via lines 247, 249 and 251, and holds
termed the rinse phase of the cleaning cycle. This rinse
these valves energized for 15 vseconds, and cam C13
phase is initiated at 165 seconds of elapsed cleaning cycle
closes switch S13 to energize solenoid 85 via line 253, 20 time, when cam C13 closes switch S13 to re-energize the
and holds this solenoid energized until the 80th second
solenoid 85 to close valve 81, holding it closed until the
of elapsedcleaning cycle time. At 20 seconds of elapsed
230th second ‘of elapsed time. At 170 seconds of elapsed
cleaning cycle time, cam C15 ‘closes switch S15 to energize
time, cam C15 closes switch S15 to energize the air corn
the ‘air compressor motor 89 via lines 253 and 233, and
pressor motor 89. As a result of this, compressed air is.
holds this motor in operation until the 80th second of 25 delivered via conduit 91 and valve 93 (now deenergized)
elapsed cleaning cycle time. With solenoid 85 energized,
and conduit 97 to metering vessel 77, and forces water out
valve ,81 is closed to close off the water metering vessel
of vessel 77 through conduit 105, valve 109 (now de
77 from communication with the hot water tank 75.
energized) conduit 111, valve 113 (now deenergized) con
With motor ‘89 in operation, compressed air is delivered
duit 115, valve 117 (now deenergized) and conduit 119
via'conduit-91through valve 93 (which is deenergized 30 (see FIG. 6) to the brew pot 29. This rinse water rises
at this time) and conduit 97 to the metering vessel 77,
up into the brew pot for rinsing the latter, and is main
and forces water from‘ vessel 77 out through conduit
tained therein for a rinse interval until the 215th second
‘105.’ With valves .109 and 113 energized, the water ?ows
of elapsed time. At this instant, ca-m C16 closes switch S16
from conduit 105 through .line 121 (see FIG. 8), becom
to re-ene‘rgize valves 93 and 117, and holds them ener
ing charged with the cleaning agent in ?owing through 35 gized until the 230th second of elapsed time. This results
. cartridge 123 to constitute a cleaning solution and the
resultant cleaning solution ?ows through conduit 115,
valve 117 (which is' deenergized at this time) and con
duit 119 to the brew pct 29. The cleaning solution enters
the'brew pot through the bottom of the pot, and rises
up through the ?lter screen 69 into the brew pot for
cleaning the‘ brew pot. The solution is maintained in
the brew pot for what may be termed a brew pot boil
in air supplied by compressor 87 (which remains in opera
tion until the 23 0th second of elapsed time) being directed
(from conduit 91 through conduit 101 (see FIG. 7) to the
top of the brew pct 29 (the lid 59 of which is still closed).
40 This air forces the rinse water downward out of the
pot through conduit 11,9, valve 117 (now energized) and
conduit 125 to the reservoir 1 wherein it is held for a rinse
interval since transfer valve 9 is now deenergized.
The rinse interval for reservoir 1 terminates at 255 sec
out period, and' the delivery of the solution to the pot
is followed by delivery of air to eltect agitation of the 45 onds of elapsed cleaning cycle time, at which instant cam
(solution in the pot for effective boil-out. This boil-out
C17 closes switch S17 to rte-energize transfer valve 9 and
period terminates at about the 65th second of elapsed
hold it open until the 295th second of elapsed time. The
cleaning cycletime, as will appear.
“
rinse water in reservoir 1 drains down into reservoir 3,
7 Transfer valve 9, three-way solenoid valve 13 and
wherein it is held for a rinse interval since pinch valve 25
pinch. valve 25 all are deenergized at the 15th second 50 is denergized and closed. This rinse interval for reservoir
'of elapsed cleaning cycle time. Valves 109 and 113 are
3 terminates at 280 seconds of elapsed time, at which
deenergized at the 30th second of elapsed time (after
instant cams C18 and C19 close switches S18 and S19
thefinstigation of delivery of the water to the brew pot
to energize the pinch valve 25 and the three-way sole
by the compressed air) and air for agitation of the charged
noid valve 13, holding valve 25 open and holding valve
yvater ,inet'he brew pot ?ows directly from conduit 105 55 13 in its setting for discharge through conduit 21 to
through valve 109, conduit r111, valve 113, conduit 115,
valve 117. and conduit_119 to the brew pot without passing
throughqthe cleaning agent- in cartridge 123. Solenoid
the waste can W until the 295th second of elapsed time.
The rinse water thereupon drains out of reservoir 3 into
the waste can. At 285v seconds of elapsed time, cam C14
closes switch S14 to re-energize the brew unit motor 51 for
,85 is held energized as long as air- is ‘delivered (i.e.,
until the 80th second of elapsed cleaning cycle time) 60 41/2 seconds. This carries disk 47 through 250° back to its
home position to effect opening of the lid 59 of the brew
to keep valve~81closed to hold water out of the metering
pot. During this phase of the operation, the brew pot
swings over from its upright to its inverted position and
h At 65 seconds of‘elapsed cleaning cycle time, cam C16
back to its upright position, but this is inconsequential. The
closesswitch S16 to energize valves 93 and 117 via lines
259, 229 and 231, and holds these valves energized until 65 cleaning cycle is thus terminated ‘with the brew pot
the _.80th,second of elapsed ‘time. This results in air sup
back in its upright position, with its lid 59 open, and disk
pliedby compressor (87 (which remains in operation until
47 back in its home position.
.vess'el77.
~
-
'
'
l
v
'
the, 80th second of elapsed time) being directed from
conduit 91 through conduit 101 (see FIG. 7) to the top of
the brew pct 29 ,(the lid 59 of. which is now closed). This
air vforces the solution in the brew pot downward out
of the pot through conduit 119, valve 117 (now energized)
and conduit 125 .to the receiving reservoir 1 wherein it is
held‘ for a boiléout interval since transfer valve ‘ 9 is ‘now
ésetsrig'izeganéi fclvssd
.,
Upon completion of the cleaning cycle, the machine is
dormant, without any brewed coffee therein, until a pur~
chaser deposits IC‘OIII “for purchase of a cup of coffee. Upon
deposit of coin, the coin switch CS closes momentarily
on its lower contact. This breaks the circuit which had
been established for the coil of relay HR to deenergize
the latter and effect opening of its contacts HRl and clo
sure of its contacts HR2 and HR3. Closure of contacts
3,333,153
15
HR2 triggers off a brew cycle, and closure of contacts
HR3 ire-starts timer motor 167. Upon closure of contacts
HR2, brew programmer motor 141 is energized via line
213, in which contacts 149 are "closed since relay BR is de
energized at this time and in which contacts 214 are closed
since relay AR is deenergized at this time, and the vendor
then ‘operates through a brew cycle the same as previous
ly described for brewing of a three-cup batch, delivery 'of
16
same system may be used tob |rew batches of instant cof:
fee, dispensing instant coffee instead‘ of ground-bean cof
fee from hopper 71. In such case, the ?lter 69 would not
be needed, and there would be no necessity for inverting
the brew pot since there would be no spent grounds to
dispose of. Similarly, various features of the invention
are adaptable to single'cup instant coffee brewing, e.'g.,
dispensing instant coffee into a pot like pot 29 and forc
in-g one cup of water up into the pot and then down out
the batch to the receiver 1, and immediate transfer of the
batch from receiver 1 to reservoir 3, valve 9 being ‘open 10 of the pot. As to all such instant coffee brew adaptations,
the cleaning system is applicable. As used herein the term
since relay TR is deenergized at this time and its contacts
“ground coffee” is intended to cover any particulate form
[52 are closed to complete circuit 211 for valve 9. Trans
of coffee, including ground-bean coffee and instant cof
fer relay TR remains deenergized until brewed coffee ?lls
fee powder, and the term “coffee substance” is intended
reservoir 3 up to electrode E1. While this brew cycle is
proceeding, operation of switch VS is ineffective, since 15 to cover ground-bean coffee, instant coffee powder, and
any other form of substance from which coffee may be
transfer ‘relay TR is deenergized, meaning that switch 153
brewed.
is down. As a result, operation of switch VS simply results
In view of the above, it will be seen that the several
in operation of motor 131 until cam C1 throws switch S1
objects of the invention are achieved and other advan
off its upper contact on to its lower contact. However,
when the transfer relay TR is ?nally energized, meaning 20 tageous results attained.
It is possible that, at times, reservoir ‘3 may not con
As various changes could be made in the above con
struction without departing from the scope of the inven
tion, it is intended that all matter contained in the above
description or shown in the accompanying drawings shall
tain a full one-cup, two-cup or three-cup measure of cof
25 be interpreted as illustrative and not in a limiting sense.
that there is coffee in reservoir 3- to vend, switch 153
raises and motor 131 completes a vend cycle to‘vend a
cup of coffee.
fee. This may be caused by evaporation or leakage of
coffee from reservoir 3 if there has been no purchase
for some time. Under these circumstances, unless special
provision is made therefor, the purchaser of the third cup
What is claimed is:
1. In a vendor for brewing and vending coffee, a brew
pot, means for holding a supply of coffee substance,
pletion of a vend cycle of vend motor 131 and transfer
of a batch of coffee from receiver 1 to reservoir 3 by
tion for brewing a quantity of coffee in the pot, means
for forcing the brewed coffee out of the pot in the oppo
transfer valve 9 during the vend cycle. Assuming that
site direction, and means for automatically recurrently
means for dispensing a measured amount of coffee sub
would receive less than a full cup. However, cam C211 30 stance from said supply into said pot, means for delivering
and switch S2a take care of this by providing for com
a measured amount of hot water into the pot in one direc
coffee in reservoir 3 has been drawn down to the last cup, 35 cleaning out the brew pot with a cleaning solution fol
lowed by a water rinse, said cleaning means being oper
which under the circumstances as mentioned would be
able in response to lapse of a predetermined interval of
less than a full cup, and which means that the level is
time after a vend cycle without a succeeding vend cycle.
below electrode E3, cam C2a rotates along with cams
2. In a Ivendor for brewing and vending coffee, a brew
C1 and C2 when vend motor 131 is set in operation by
a purchaser’s deposit of coin and actuation of vend switch 40 pot having a ?lter and a port on one side of the ?lter,
means for holding a supply of ground coffee, means for
dispensing a measured amount of coffee from said supply
into the pot on the other side of the ?lter, means for
delivering a measured amount of hot‘ water into the pot
plete its single-revolution cycle via lines 187, 189, the 45 through the port and the ?lter for brewing a quantity of
coffee in the pot, means for forcing the brewed coffee out
lower pole of contacts 153 of relay TR (which is deener
of the pot through the ?lter and the port, means for hold
gized at this time) and line 158 including closed switch
ing a supply of a cleaning agent, means for automatically
S2a, the latter being opened at the end of the single-rev
recurrently cleaning out the brew pot with a cleaning solu
olution cycle. This insures completion of a vend cycle and
full operation of transfer valve 9 by switch S2 to com 50 tion of cleaning agent from said supply dissolved in water,
followed by a water rinse, and coin-controlled means oper
plete the transfer of coffee from receiver 1 to reservoir
able by, a purchaser for effecting operation of the vendor
3. This supplies additional coffee to reservoir 3 during
through a vend cycle to vend a cup of brewed coffee, and
the vending of the third cup to insure that the purchaser
wherein said ‘cleaning means is operable in response to
receives a full cup.
FIG. 9 shows a possible modi?cation in which, instead 55 lapse of a predeterminedv interval of time after a vend
VS. Cam C2a functions to close switch 82a slightly after
closure of switch S2, holds it closed until switch S1 opens,
and then opens switch S2a _(see FIG. 3). Upon closure
of switch 82a, motor 131 is held in operation to com
of providing the cleaning solution by passing hot water
through the cartridge 123, line 121, cartridge 123 and
cycle without a succeeding vend cycle.
3. In a vendor for brewing and vending coffee, a brew
pot having a port at the bottom and a ?lter above the
valves 109 and 113 are omitted, and cleaning agent is
port, a lid for the pot, means for opening and closing the
dispensed into the brew pot at the start of a cleaning cycle
from a hopper 301 containing a supply of cleaning agent 60 lid, a valve having an inlet, a transfer port and an out
let, the transfer port being connected to the brew pot port,
having a dispenser 303 (a solenoid-operated dispenser,
said valve being adapted in a first position for ?ow from
for example) for dispensing a measured amount of clean
its inlet through the transfer port with the outlet blocked,
ing agent into the pot.
and in a second position for ?ow from the transfer port
While the invention is herein described particularly as
it relates to the so-called small-batch-brew vendor, it will 65 through the outlet with the inlet blocked, means for
holding a supply of ground coffee, means operable with
be understood that various features of the invention are
the lid open to dispense a measured amount of ground
adaptable to other types of vendors, such as a single-cup
coffee from said supply into the pot, means operable with
brew vendor. For example, a brew unit like unit 5 and
the lid closed and the valve in its ?rst position for de
the associated means for forcing water up into the brew
pot of the brew unit and then down out of the pot may 70 livering a measured quantity of hot water through the
valve into the pot through the brew pot port and ?lter
be adapted to a single-cup-brew vendor, as well as the
for brewing a quantity of coffee in the pot, and means oper
cleaning system.
able with the lid closed and the valve in its second posi
Also, various features of the invention are adaptable
tion for forcing the brewed coffee out of the pot through
to a vendor utilizing an instant coffee substance instead
of coffee ground from coffee beans. For example, the 75. the filter, the brew pot port, and‘ through the outletv of
17
3,338,153
'18
the valve, the means for delivering the hot water to the
further comprising means for holding a supply of a
pot comprising a hot water metering vessel, and an air
compressor connected to said vessel for delivering com
pressed air thereto for forcing water therefrom into the
pot, the means for forcing the brewed coffee out of the
pot comprising an air connection from said air compressor
to the top of the pot and valve means for effecting de
livery of air from the compressor alternately to the meter
cleaning agent, and means for automatically recurrently
cleaning out the brew pot comprising means operable
to actuate said hot water delivery means for delivering
hot water through the valve into the pot, together with
a quantity of cleaning agent from the supply thereof, to
effect cleaning of the pot by the resultant cleaning solution,
ing vessel and through said air connection to the pot.
means operable to actuate said forcing means to force the
cleaning solution out of the pot, means operable to actuate
the hot water delivery means for delivering hot water
4. In a vendor for brewing and vending coffee, a
brew pot having a port at the bottom and a filter above
the port, means mounting the brew pot for swinging move
ment about a horizontal axis offset from the vertical axis
of the pot for movement‘ between an upright brew posi
tion and an inverted dumping position, a lid mounted 15
means operable to actuate the forcing means to force the
rinse water out of the pot.
a measured quantity of hot water through the valve into
ceiver, and means responsive to dispensing of a further
through the valve into the pot for rinsing the pot, and
6. A vendor for brewing and vending coffee compris
ing a reservoir for holding a batch of brewed coffee, means
separately from the pot for closing the pot when in its
for dispensing coffee in single-cup quantities from the res
brew position, means for opening and closing the lid, a
ervoir, a receiver for holding a batch of brewed coffee for
valve having an inlet, a transfer port and an outlet, the
ultimate delivery to the reservoir, a valve between said
transfer port having a ?exible connection to the brew pot
receiver and said reservoir, a brew system comprising a
port, said valve being adapted‘in a ?rst position for ?ow 20 brew pot, means for holding a supply of coffee substance,
from its inlet through the transfer port with the outlet
means for dispensing a measured amount of coffee sub
blocked, and in a second position for ?ow from the trans
stance from said supply into the pot, means for‘ delivering
fer port through the outlet with the inlet blocked, means
ing hot water to the brew pot, allowing it to remain there
for holding ‘a supply of ground coffee, means operable
in for a brewing interval to brew a batch of coffee and
with the pot in brew position and the lid open to dispense 25 then delivering the batch to the receiver, means respon
a measured amount of ground coffee from said supply into
sive to dispensing of a predetermined amount of coffee
the pot, means operable with the pot in brew position, the
from the reservoir for initiatingoperation of the brew
lid closed, and the valve in its ?rst position for delivering
system to brew a batch of coffee and deliver it to the re
the pot through the brew pot port and ?lter for brewing 30 amount of coffee from the reservoir for opening said valve
a quantity of coffee in the pot, means operable with the
for transferring the batch of brewed coffee in the receiver
lid closed and the valve in its second position for forcing
to the reservoir.
the brewed coffee out of the pot through the ?lter, the
7. A vendor as set forth in claim 6 wherein said brew
brew pot port and the outlet of the ‘valve, and means op
system brews a batch not more'than six cups.
erable thereafter to open the lid and swing the pot to 35
8. A vendor as set forth in claim 7 wherein said brew
inverted position for dumping the spent coffee grounds,
wherein the means for delivering the hot Water to the
pot comprises a hot water’ tank, a metering vessel in the
tank, means for opening the metering vessel for filling it
system brews a batch of three cups.
,
9. A vendor as set forth in claim 6 wherein said means
for initiating operation of the brew system is responsive
to dispensing of the next to last cup from the reservoir,
with hot water from the tank and closing it, and an air 40 and the means for transferring the batch from the re—
compressor connected to said vessel for delivering com
ceiver to the reservoir is responsive to the dispensing of
pressed air thereto when said vessel is closed for forcing
the last cup from the reservoir.
‘
p
water therefrom through the valve to the pot, and wherein
v 10. A vendor as set forth in claim 6 further comprising
the means for forcing the brewed coffee out of the pot
means for effecting dumping of brewed coffee from the
comprises a ?exible air line connected to a port in the
‘ receiver and the reservoir, and means for automatically
45
lid and valve means for effecting delivery of air from the
recurrently cleaning out the brew pot, receiver and res—
compressor alternately to the metering vessel and said
ervoir comprising means for actuating said brewed coffee
air line.
'
>
dumping means, then ?ushing out the pot, the receiver and
5. In a vendor for brewing and vending coffee, a brew
the reservoir with a cleaning solution, followed by a water
pot having a port at the bottom and a ?lter above the port,
rinse of the pot, the receiver and the reservoir.
means mounting the brew pot for swinging movement 50
11. A vendor for brewing and vending coffee compris~
about a horizontal ‘axis offset from the vertical axis of the
ing a reservoir for holding a batch of brewed coffee,
pot for movement between an upright brew position and
means for dispensing coffee in single-cup quantities from
an inverted dumping position, a lid mounted separately
the reservoir, a receiver for holding a batch of brewed
from the pot for closing the pot when in its brew position,
coffee for ultimate delivery to the reservoir, a valve be
means for opening and closing the lid, a valve having an 55 tween said receiver and said reservoir, a brew system
inlet, a transfer port and an outlet, the transfer port hav
comprising a brew pot having a ?lter and a port on one
ing a ?exible connection to the brew pot port, said valve
side of the ?lter, means for holding a supply of ground
being adapted in a ?rst position for flow from its inlet
coffee, means for dispensing a measured amount of
through the transfer port with the outlet blocked, and in
ground coffee from said supply into the pot, means for
a second position for flow from the transfer port through
delivering a measured quantity of hot water into the pot
the outlet with the inlet blocked, means for holding a
through said port and the ?lter, allowing it to remain in
supply of ground coffee, means operable with the pot in
the pot for a brewing interval to brew a batch of coffee,
brew position and the lid open to dispense a measured
and then forcing the resultant batch out of the pot through
amount of ground coffee from said supply into the pot, 65 the ?lter to the receiver, means responsive to dispensing
means operable with the pot in brew position, the lid
of a predetermined amount of coffee from the reservoir
closed, and the valve in its ?rst position for delivering a
for initiating operation of the brew system to brew a
measured quantity of hot water through the valve into
batch of coffee in the pot and deliver it to the receiver,
the pot through the brew pot port and ?lter for brewing
_ and means responsive to dispensing of a further amount
a quantity of coffee in the pot, means operable with the 70 of—coffee from the reservoir for opening said valve for
lid closed and the valve in its second position for forcing
transferring the batch of brewed coffee in the receiver to
the brewed coffee out of the pot through the ?lter, the
the reservoir.
brew pot port and the outlet of the valve, and means
operable thereafter to open the lid and swing the pot to
12. A vendor for brewing and vending coffee compris
ing a reservoir for holding a batch of brewed coffee,
inverted position for dumping the spent coffee grounds 75 means for dispensing coffee in single-cup quantities from
3,338,153
19
the reservoir, a receiver for holding a batch of brewed
coffee for ultimate delivery to the reservoir, a ?rst valve
between said receiver and said reservoir, a brew system
comprising a brew pot having a ?lter and a port
on one side of the ?lter, a second valve having an inlet,
and transfer port, the transfer port being connected
to the brew pot port, said second valve being adapted
in a ?rst position for ?ow from its inlet through
the transfer port with the outlet blocked, and in a second
20
end position for flow from the transfer port through the
outlet with the inlet blocked, means for holding a supply
of ground coffee, means operable with the lid open to
dispense a measured amount of ground coffee from said
supply into the pot, means operable with the lid closed
and said second valve in its ?rst position for delivering
a measured quantity of hot water through said second
valve into the pot through the brew pot port and ?lter,
allowing it to remain in the pot for a brewing interval
position for ?ow from the transfer port through the outlet 10 to brew a batch of coffee, means operable with the lid
closed and said second valve in its second position for’
with the inlet blocked, means for holding a supply of
forcing the resultant batch of coffee out of the pot through
ground coffee, means for dispensing a measured amount
the ?lter, the brew pot port and through the outlet of
of coffee from said supply intothe pot on the other side
said second valve to the receiver, means responsive to
of the ?lter, means operable with said second valve in its
?rst position for delivering a measured quantity of hot 15 dispensing of a predetermined amount of coffee from the
reservoir for initiating operation of the brew ‘system to
water through said second valve into the pot through the
brew a batch of coffee in the pot and deliver it to the
brew pot port and ?lter, allowing it to remain in the pot
receiver, and means responsive to dispensing of a fur
for a brewing interval to brew a batch of coffee, means
ther amount of coffee from the reservoir for opening said
operable with said second valve in its second position
for forcing the resultant batch of brewed coffee out of 20 ?rst valve for transferring the batch of brewed coffee in
the receiver to the reservoir.
the pot through the ?lter, the brew pot port, and through
17. A vendor as set forth in claim 16 wherein the
the outlet of the valve to the receiver, means responsive
means for delivering the hot water to the pot comprises
to dispensing of a predetermined amount of coffee from
a hot water metering vessel, and an air compressor con
the reservoir for initiating operation of the brew system
to brew a batch of coffee in the pot and deliver it to the 25, nected to said vessel for delivering compressed air there
to for forcing water therefrom into the pot.
receiver, and means responsive to dispensing of a further
18. A vendor as set forth in claim :17 wherein the
amount of coffee from the reservoir for opening said ?rst
means for forcing the brewed coffee out of the pot com-,
valve for transferring the batch of brewed coffee in the
prises an air connection from said air compressor to the
receiver to the reservoir.
13. A vendor for brewing and vending coffee compris 30 top of the pot and valve means for effecting delivery of
air from the compressor alternately to the metering vessel
ing a reservoir for holding a batch of brewed coffee,
and through said air connection to the pot.
means for dispensing coffee in single-cup quantities from
19. A vendor for brewing and vending coffee com
the reservoir, a receiver for holding a batch of brewed
prising a reservoir for holding a batch of brewed coffee,
coffee for ultimate delivery to the reservoir, a valve be
tween said receiver and said reservoir, a brew system 35 means for dispensing coffee in single-cup quantities from
the reservoir, a receiver for holding a batch of brewed
comprising a brew pot, a lid for the pot, means for open
coffee for ultimate delivery to the reservoir, a valve
ing and closing the lid, means for holding a supply of
between said receiver and said reservoir, a brew system
coffee substance, means operable with the lid open to
dispense a measured amount of coffee substance from ,
comprising a brew pot having a port at the bottom and a
closed for delivering a measured amount of hot water
movement between an upright brew position and an in
said supply into the pot, means operable with the lid 40 ?lter above the port, means mounting the brew pot for
verted dumping position, a lid for closing the pot when
in its brew position, means for opening and closing the
lid, means for holding a supply of ground coffee, means
interval to brew a batch of coffee, means operable with
the lid closed for forcing the resultant batch of brewed 45 operable with the pot in brew position and the lid open
into the pot through its bottom and up through the ?lter,
allowing the hot water to remain in the pot for a‘ brewing
to dispense a measured amount of ground coffee from
coffee out of the pot through the ?lter to the receiver,
said supply into the pot, means operable with the pot in
means responsive to dispensing of a predetermined
brew position and the lid closed for delivering a meas
amount of coffee from the reservoir for initiating oper
ured amount of hot water into the pot through its bot
ation of the brew system to brew a batch of coffee in the
pot and deliver it to the receiver, and means responsive 50 tom and up through the ?lter, allowing it to remain in
the pot for a brewing interval to brew a batch of coffee,
to dispensing of a further amount of coffee from the
reservoir for opening said valve for transferring the batch‘
of brewed coffee in the receiver to the reservoir.
means operable with the pot in brew position and the
lid closed for forcing the resultant batch of brewed coffee
out of the pot through the ?lter to the receiver, means
14. A vendor as set forth in claim 13 wherein the
means for delivering the hot water to the pot comprises 55 for thereafter inverting the pot to dump the spent coffee
grounds, means responsive to dispensing of a predetere
a hot water metering vessel, and means for delivering
mined amount of coffee from the reservoir for initiating
compressed air to said vessel for forcing water therefrom
operation of the brew system to brew a batch of coffee in
into the pot._
the pot and deliver it to the receiver, and means respon
15. A vendor as set forth in claim 14 wherein the
means for forcing the brewed coffee out of the pot com 60 sive to dispensing of a further amount of coffee from the
prises means for delivering compressed air into the top
of the pot.
16. A vendor for brewing and vending coffee compris
' reservoir for opening said valve for transferring the batch
of brewed coffee in the receiver to the reservoir.
20. A vendor as set forth'in claim 19 wherein the
means for delivering the hot water to the pot comprises
ing a reservoir for holding a batch of brewed coffee,
means for dispensing coffee in single-cup quantities from 65 a hot water metering vessel, and means for delivering
' compressed air to said vessel for forcing water therefrom
the reservoir, a receiver for holding a batch of brewed
into the pot.
'
coffee for ultimate delivery to the reservoir, a ?rst vvalve
21. A vendor as set forth in claim 20 wherein the
between said receiver and said reservoir, a brew system
means for, forcing the brewed ‘coffee out of the pot com
comprising a brew pot having a port at the bottom and
a ?lter above the port, a lid for the pot, means for open 70 prises means for delivering compressed air into the top
ing and closing the lid, 9. second valve having an inlet, a ' of the pot.
22. A vendor for brewing and vending coffee compris
transfer port and an outlet, the transfer por't being con
nected to the brew pot port, said second valve being
ing a reservoir for holding a batch of brewed coffee, means
adapted in a ?rst position for ?ow from, its inlet through
for dispensing coffee in single-cup quantities from the
the‘ transfer port with the outlet blocked, and in a sec
_ reservoir, a receiver for holding a batch of brewed coffee
3,333,153
‘
21 ‘
for ultimate delivery to the reservoir, a ?rst valve be
22
cation from the air compressor to the metering vessel
and alternately effecting communication from the com
tween said receiver and said reservoir, a brew system com~
prising a brew pot having a port at the bottom and a
pressor to the port in the lid, means for holding a sup
ply of ground coffee, means operable with the pot in
brew position and the lid open to dispense a measured
amount of ground coffee from the supply into the pot, a
?lter above the port, means mounting the brew pot for
swinging movement about a horiontal axis offset from
the vertical axis of the pot for movement between an up
right brew position and an inverted dumping position,
a lid mounted separately from the pot for closing the
pot when in its brew position, means for opening and
‘ brew programmer for effecting operation of the vendor
closing the lid, a second valve having an inlet, a trans
fer port and an outlet, the transfer port having a ?exible
connection to the brew pot port, said second valve being
adapted in a ?rst position for flow from its inlet through
the transfer port with the outlet blocked, and in a sec
ground coffee into the pot, closure of the lid, operation
of the air compressor for delivery of compressed air to
the metering vessel to force hot water from the metering
vessel into the pot, brewing of a batch of coffee in the
brew position and the lid open to dispense a measured
of the pot to brew position, means responsive to dis
through a brew cycle involving operation of the ground
coffee dispensing means to dispense a measured amount of
pot, delivery of compressed air through the port in the
ond position for flow from the transfer port through the 15 lid to force the resultant batch through the ?lter and out
outlet with the inlet blocked, means for holding a sup
of the pot to the receiver, opening of the lid, inversion
ply of ground coffee, means operable with the pot in
of the pot for dumping the spent grounds, and return
amount of ground coffee from said supply into the'pot,
pensing of a predetermined amount of coffee from the
means, operable with the pot in brew position, the lid 20 reservoir for initiating operation of the brew program
closed, and said second valve in its ?rst position for deliv
mer, and means responsive to dispensing of a further
»ering a measured quantity of hot water through said sec
amount of coffee from the reservoir for transferring the
batch in the ‘receiver to the reservoir.
ond valve into the pot through the brew pot port and ?lter,
allowing it ‘to remain in the pot for a brewing interval
26. A vendor as set forth in claim 25 wherein said brew
to brew a batch of coffee, means operable with the lid 25 system brews a batch not more than six cups.
closed and said second valve in its second position for
27. A vendor as set forth in claim 26 wherein said brew
forcing the resultant batch of brewed coffee out of the
system brews a batch of three cups.
pot through the ?lter, the brew pot port and the outlet
28. A vendor as set forth in claim 25 wherein said
of said second valve to the receiver, means operable
means for initiating operation of the brew system is respon
thereafter to open the lid and swing the pot to inverted 30 sive to dispensing of the next to last cup from the reser
position for dumping the spent coffee grounds, means
voir, and the means for transferring the batch from the
receiver to the reservoir is responsive to the dispensing
of the last cup from the reservoir.
responsive to dispensing of a predetermined amount of
coffee from the reservoir for initiating operation of the
brew system to brew a batch of coffee in the pot and de
liver it to the receiver, and means responsive to dispens
ing of a further amount of coffee from the reservoir for
opening said ?rst valve for transferring the batch of
brewed coffee in the receiver to the reservoir.
29. A vendor as set forth in claim 25 further compris
35 ing means for effecting dumping of brewed coffee from
23. A vendor as set forth in claim 22 wherein the
the receiver and the reservoir, means for holding a supply
of a cleaning agent, and a cleaning cycle programmer for
effecting operation of the vendor through a cleaning cycle
involving operation of the brewed coffee dumping means
means for delivering the hot water to the pot comprises 40 to dump brewed coffee vfrom the receiver and the reser
a hot water tank, a metering vessel in the tank, means
voir, operation of the air compressor for delivery of com
for opening the metering vessel for ?lling it with hot
pressed air to the metering vessel to force hot water from
water from the tank and closing it, and an air com
the metering vessel into the pot, addition of cleaning agent
pressor connected to said vessel for delivering compressed , ‘ from the supply thereof to the hot water to provide a
air thereto when said vessel is closed for forcing water
cleaning solution for cleaning the pot, delivery of com:
therefrom though the valve to the pot.
pressed air through the port in the lid to force the clean
24. A vendor as set forth in claim 23 wherein the
ing solution through the ?lter and out of the potand suc
means for forcing the brewed coffee out of the pot com
cessively through the receiver and the reservoir, operation
prises a ?exible air line connected to a port in the lid and . of the air compressor for delivery of compressed air to
valve means. for effecting delivery of air from the com 50 the metering vessel to force hot water from the metering
pressor alternately to the metering vessel and said air
vesselinto the pot for rinsing the pot, and delivery of com
line.
pressed air through the port in the lid to'iforce the ‘rinse
25. A vendor for brewing and vending coffee compris
water through the ?lter and out of the pot and successive
ing a reservoir for holding a batch of brewed coffee,
ly through the receiver and the reservoir.
means for dispensing coffee in single-cup quantities from 55
the reservoir, a receiver for holding a batch of brewed
coffee for ultimate delivery to the reservoir, a hot water
tank, a hot water metering vessel submerged in the tank,
_
a valve for opening the metering vessel for ?lling it with
hot water from the tank and closing it, a brew pot hav 60
ing a port at the bottom and a ?lter above the port, means
mounting the brew pot for swinging movement above 'a
horizontal axis offset from the vertical axis of the pot for
30. A vendor for brewing and vending coffee compris
ing a brewer for brewing coffee to be vended, coin-con
trolled means operable by a purchaser for effecting oper
ation of the vendor through a vend cycle to vend a cup of
brewed coffee, and means responsive to lapse of a pre
determined length of time after a vend cycle without a
succeeding vend cycle for automatically cleaning out the
brewer comprising means for applying a cleaning solu
tion to the brewer, and means for thereafter rinsing out
movement between an upright position and an inverted
the brewer with water.
dumping position, a lid mounted separately from the pot 65
31. A vendor as set forth in claim 30 wherein the
for closing the pot when in its brew position, said lid
means for applying the cleaning solution to the brewer is
having a port, means for operating the lid and pot in a
effective to hold the solution in the brewer for a cleaning
sequence involving closure of the lid on the pot in brew
interval and then effective to drain the solution from the
, position, dwell of the lid in closed position, opening of
brewer.
the lid, inversion of the pot for dumping, and return of 70
32. A vendor as set forth in claim 31 wherein the rins
the pot to brew position, means for effecting communi
ing means is effective to hold the rinse water in the brewer
cation from the metering vessel to the brew pot through
in the brewer for a rinse interval and then effective to
the brew pot port and alternately effecting communica
drain the rinse water from the brewer.
tion from the pot through the brew pot port to the re
33. A vendor for brewing and vending coffee compris
ceiver, an air compressor, means for effecting communi 75 ing a brewer for brewing co?ee to be vended, a source of
3,333,153‘
23
hot water for supplying the brewer with hot water for
brewing coffee, ?rst means for removing spent coffee
grounds from the brewer after each brew cycle, and sec
ond means for cleaning out the brewer at intervals other
than after each brew cycle comprising a source of a clean
ing agent, means for washing out the brewer with a solu
tion of cleaning agent in hot water derived from said re
spective sources, and means for thereafter rinsing out the
brewer with hot water from said hot water source.
34. A vendor as set forth in claim 33 wherein the means 10
grounds comprising means
.
24for holding a supply‘ of a
cleaning agent, means for washing out the brewer with a
solution of cleaning agent and hot water derived from
said respective supplies, and means for thereafter rinsing
out the brewer with hot water from said supply.
44. A vendor as set forth in claim 43 wherein the clean
ing means is operable in response to lapse of a predeter
mined length of time after a vend cycle without a suc
ceeding vend cycle.
45. In a vendor for brewing and vending coffee, means
for brewing a batch of coffee, means for holding a batch
for washing out the brewer comprises means for deliver
ing hot water and cleaning agent to the brewer and hold
ing the resultant cleaning solution in the brewer for a
of brewed coffee for being vended, coin-controlled means
operable by a purchaser for effecting operation of the
vend cycle to vend a cup of brewed coffee, and means re
vend cycle.
vendor through a vend cycle to vend a cup of brewed cof
claning interval and then draining the cleaning solution
15 fee from said batch, means for dumping brewed coffee
from the brewer.
from said holding means, means for cleaning the brewing
35. A vendor as set forth in claim 34 wherein the rins
and holding means, and means responsive to lapse of a
ing means is effective to hold the rinse water in the brewer
predetermined interval of time after a vend cycle without
for a rinse interval and then effective to drain the rinse
a succeeding vend cycle for actuating said dumping means
water from the brewer.
36. A vendor as set forth in claim 35 wherein the hot 20 and said cleaning means.
46. A vendor as set forth in claim 45 wherein said
water is delivered to the brewer through the source of
time-interval responsive means comprises an electric timer,
cleaning agent.
a circuit for energizing said timer and tending to cause
37. A vendor as set forth in claim 33 wherein the hot
it
to operate continuously, and means for resetting said
water and cleaning agent are separately delivered to the
timer to zero in response to operation of the vendor
25
brewer.
through a vend cycle.
38. A vendor for brewing and vending coffee compris
47. A vendor as set forth in claim 46 further compris~
ing a brewer for brewing coffee to be vended, a source of
ing
means operable in response to initiation of operation
hot water for supplying the brewer with hot water for
of said cleaning means for holding said timer out of op
brewing coffee, coin-controlled means operable by a pur
chaser for effecting operation of the vendor through a 30 eration until the next operation of the vendor through a
48. In a vendor for brewing and vending coffee, a brew
sponsive to lapse of a predetermined length of time after
pot, a ?rst shaft mounting the brew pot for swinging
a vend cycle without a succeeding vent cycle for automat
movement between an upright brew position and an in
ically cleaning out the brewer comprising a source of a
cleaning agent, means for washing out the brewer with 35 verted dumping position, a lid, 3, second shaft mounting
the lid for swinging movement about a ?xed axis relative
a solution of cleaning agent in hot water derived from the
to the pot for closing the pot when in its upright brew
respective sources, and means for thereafter rinsing out
position, a rotary member, and interengageable drive ele
the brewer with hot water from the source thereof.
ments on said member and said shafts for effecting clos
39. A vendor as set forth in claim 38 wherein the
ing
of the lid upon rotation of said member through part
40
means for washing out the brewer comprises means for
of a revolution, and for effecting opening of the lid, in
delivering hot water and cleaning agent to the brewer and
version of the pot, and return of the pot to brew position
holding the resultant cleaning solution in the brewer for
upon
rotation of said member through the remainder of
a cleaning interval and then draining the cleaning solu
a revolution, and wherein said pot has a port at the bot
tion from the brewer.
40. A vendor as set forth in claim 39 wherein the rins 45 tom and a ?lter above the port, said lid has a port, said
?rst shaft is offset from the vertical axis of the pot, and
ing means is effective to hold the rinse water in the brewer
said interchangeable elements comprise gears on the shafts
for a rinse interval and then effective to drain the rinse
I and inside and outside gear elements secured to said rotary
water from the brewer.
member.
41. A vendor as set forth in claim 38 wherein the hot
References Cited
water is delivered to the brewer through the source of 50
UNITED
STATES PATENTS
cleaning agent.
42. A vendor as set forth in claim 38 wherein the
2,016,281 10/1935 Harper et al. ____ __ 99-289 X
hot water and cleaning agent are separately delivered to
2,770,248 11/1956 Audia ____________ __ 137-240
the brewer.
2,887,038
5/1959 Rosander ________ __ 99-283 X
55
43. A vendor for brewing and vending coffee com
2,906,193
9/1959 McCauley _________ __ 99-283
prising a brewer for brewing coffee to be vended, coin
2,910,928
11/1959 Rota _____________ __ 99-289
controlled means operable by a purchaser for effecting op
3,011,426 12/1961 Mueller _________ __ 99-289 X
eration of the vendor through a vend cycle to vend a cup
3,103,159
9/ 1963
Breitenstein ________ __ 99-289
of brewed coffee, means for holding a supply of ground
3,194,147
7/1965 Cowley _________ __ 99-289 X
coffee, means for dispensing a measured amount of cof 60. 3,221,637 12/1965 ' Small et al. ________ __ 99-289
fee from said supply into the brewer, means for holding
3,223,023
12/ 1965 Miller ____________ __ 99-289
a supply of hot water, means for delivering a measured
amount of hot water into the brewer for brewing a quan
WILLIAM 1. PRICE, Primary Examiner.
tity of coffee in the brewer, means for discharging the
WALTER
A. SCHEEL, Examiner.
spent coffee grounds from the brewer, and means for 65
automatically recurrently cleaning out the brewer at in
S. P. FISHER, Assistant Examiner.
tervals other than that for discharging the spent coffee
1