Test administering apparatus
United States Patent
_ [1113579370
George K. Bennett
3,294,924 12/1966 Fein ...................... ..
. . i . ..
Richard G. Buchanan, New York, NY,
3,484,955 l2/ 1969 Lippert ....................... ..
[211 App; No- 253,321: 1969
Joslow . . . . . .
3 1
't '
‘Great B1‘! 3111...
.......... ..
35 35
[45] Patented May 25, 1971
1,9629 5
[73] Assignee
The Psychlogical Corporation
Primary Examiner-w11l1i_im H- G?eb
New York, NY.
Atlorneys- Lewis H. Esllnger, Alvin Sinderbrand and
Curtis, Morris and Safford
/ (C)
10 Claims’ 4 Drawmg Figs.
ABSTRACT: A test administering apparatus has a plurality of
[52] US. Cl ...................................................... ..
[5 i 1
Field of Search .......................................... .. 35/8 (A), 9,
tape playback units individually controllable by an examiner
at a console to provide verbal instructions for, and to time a
....................................................... ..
respective test’ and the outputs ofthe playback units are Selee
tively fed, as by station selector switches at the console, to any
of a plurality of headphones or earpieces to be utilized by in
13’ 35 (C), 48; 179/1002 (s)
References Cited
dividual examinees and/or to selected loudspeakers in ex
amination rooms occupied by groups of examinees. An alert
signal is provided from each operating playback unit to the ex
3,217,428 1 l/ 1965 Spaulding ................... ._
3,222,597 12/ l 965 Beatenbough et a1. ..... ..
aminer near the end of the allotted time for the respective test
and the end of such allotted time is also signalled to the ex
aminer as well as to each examinee taking the test.
Red?eld et a1 .............. ..
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This invention relates generally to test administering ap
paratus, that is, to apparatus for use in administering stan
dardized- aptitude, psychological, achievement or employment
Heretofore, in administering tests of the described type, the
examiner ?rst distributed the printed test materials to each ex
aminee and then orally presented the directions or instruc
tions for the respective test. After such preparation, the ex
aminer signalled the start of the test and, by means of a clock
or other timing device, kept track of the time allotted for the
test and signalled the end of the allotted time.
tive playback unit, and such alert signal is reproduced at the
console, in an audible orother readily observable form, to
alert the examiner to the impending conclusion of a testing
period. An audible signal is also provided at the console in
response to the reproduction of the cue signal so as to advise
the examiner of the actual completion of a-testing period.
The above, and other objects, features and advantages of
this invention, will be apparent in the following detailed
description of an illustrative embodiment thereof ‘which is to
be read in connection with the accompanying drawings,
FIG. I is a schematic diagram showing a test administering
apparatus according to this invention;
The foregoing conventional procedure for administering
FIG. 2 is a schematic and wiring diagram for one of the tape
tests has many disadvantages. The necessity of orally present 15 playback
units included in the apparatus of FIG. 1;
ing the test instructions to successive examinees or groups
FIG. 3 is a wiring diagram for the console provided in the
thereof is a tedious chore for the examiner, and the instruc
apparatus of FIG. 1 for controlling the various tape playback
tions may not be audibly or clearly presented or uniformly
units; and
given to all examinees. The time allotted for each test may not
be exactly observed, that is, an error or oversight by the ex
aminer may result in different times being given for the
completion of a test by several examineesso that the test
results are not a fair measure of their relative abilities or
FIG. 4 is a fragmentary diagrammatic view of a two-track
tape to be used with the apparatus according to this invention
and indicating the various signals'to be recorded thereon.
Referring to the drawings in detaiI,-and initially to FIG. 1
thereof, it will be seen that a test administering apparatus ac
capacities. Since the examiner is charged with orally present
cording to this invention generally comprises plural, for exam- 25
ing the test instructions and with personally timing the tests, it
ple, three, tape playback units TP,,, TP,, and TPC located ad
is di?icult for a single examiner to simultaneously administer
jacent a console 10, testing stations T5,, T5,, TS3—TS,,, for
several different tests having different instructions and dif
py the attention of the examiner as to preclude the simultane
ous performance of any other functions, such as, the scoring
example, 10 in number, that may be remote from console 10
and at which headphones I-I,, H2, I-I,—I-I,, are located for
providing instructions and verbal start and stop signals to in
dividual examinees, and examination rooms R,, R2 and R3 also
remote from console 10 and in which loudspeakers Sp ,, Sp,
and Spa are respectively located for audibly reproducing ver
Another object is to provide a test administering apparatus
by which the examiner can with convenience simultaneously
CA, CB and C‘; by which an examiner at the console can con
trol and be made aware of the operating conditions of tape
ferently allotted times, or to administer a test to several ex
aminees who do not start the test at the same time. Further,
the above-described functions of the examiner in the conven
tional administration of standardized tests so completely occu
of previously given tests, the interviewing of applicants and 35 bal instructions and start and stop signals for groups of ex—
aminees occupying such rooms.
handling of employment applications and references and the
administer several different tests to different examinees or
groups thereof or administer a test to examinees who start the
test at different times.
The console 10 is shown to generally include control units
playback units TP,,, TP,, and TPC, respectively, and station
selector switches 8,, S2‘, S3 —-S,, connected with jacks 1,, J2, J,
—J,, at the testing stations T8,, T8,, TS;,-—TS,,, respectively,
for receiving the headphones and also connected with control
A further speci?c object is to ensure that, in the administer
units C,4, CB and CC for selectively determining which of the
ing of tests of the described character, there is precise
uniformity in the giving of the instructions to various ex 45 audio outputs of the tape playback units is fed to each of the
testing ‘stations.
aminees and also in the timing of the tests so that the test
results can be relied upon.
Still another object is to provide a test administering ap
paratus which minimizes the training required of the ex
aminer, particularly when various tests are to be given.
In accordance with this invention, a test administering ap
paratus has a plurality of tape playback units each adapted to
Each of the tape play-back .units TP,,, TP,, and TPC
generally includes a tape cartridge handler, or deck D, for ex
ample, of the type that is commercially available under the
designation Viking Model “36" from Viking of Minneapolis,
Inc., 9600 Aldrich Avenue South, Minneapolis, Minn., and
which is operable to reproduce magnetically recorded signals
provided on an endless loop of tape in a_ cartridge, for exam
receive a tape cartridge on the tape of which there are
ple, of the type available commercially under the trade name
recorded at least the verbal instructions for a respective test,
verbal or other audible start and stop signals which are 55 Fidelipac from Telepro Industries, Inc., Cherry Hill, New Jer
sey. As shown on FIG. 4, the endless loop of tape T to be used
suitably spaced apart along the tape so that, at the standard
according to this invention has two record tracks 2, and t2
running speed of the tape during operation of the playback
which are to be respectively scanned by magnetic playback
unit, the time interval between reproduction of the start signal
and of the stop signal corresponds to the time allotted for the
heads 11 and 12 included in a head assembly 13 of each
respective test and an inaudible cue signal located on the tape
to be reproduced at, or about the same time as the audible
playback unit (FIG. 2).
The track t, of the tape loop has recorded, along a length L,
stop signal, and the operation of each playback unit is selec
tively initiated by the examiner, preferably from a single con
sole, and halted automatically upon the reproduction of the
thereof, verbal instructions or directions for the performance
of a respective test followed, as at L,, by a verbal or other
audible start signal (FIG. 4). Further, a verbal or other audible
one signal. Further, the reproduced verbal instructions for a 65 stop signal is recorded in a length L, of track t, which is spaced
particular test and the verbal or other audible start and stop
from the length 1.2 containing the start signal by a distance D,
signals are selectively fed, as by selector switches at the con
selected so that, at the standard running speed of the tapeT
sole, from each of the operated playback units to any of a plu
during operation of the playback unit, the time interval
rality of headphones or earpieces to be utilized by examinees
between reproduction of the start signal and reproduction of
at individual testing stations and/or to selected loudspeakers
the stop signal will correspond to the time allotted for the
in examination rooms occupied by groups of examinees.
respective test. Although for purposes of illustration FIG. 4
In a preferred embodiment of the invention, the tape of
shows the ends of tape T spaced from each other, it will be ap
each cartridge further bears an alert signal positioned thereon
parent that such ends are, in practice, joined to form a loop
to be reproduced a short time, for example, five seconds, be
with the length L, of track I, returning to the position of head
fore the reproduction of the cue signal which stops the respec 75 11 after the latter has reproduced the stop signal in length L3.
or signal, for example, of 1000 c./s., and such length L4 is
gizing of relay coil 29-1, a circuit is closed between connector
pin 24-7 and connector pin 24-8, as hereinafter described in
detail. A conductor 33 extends frompin 24-8 to one side of
located along the tape so that the cue signal recorded therein
coil 29-1 which has its other side grounded, as shown. Thus,
' ‘The tape T to be used .in the apparatus according to this inven
tion also has recorded, in a length L4 of its tract t2, a cue tone
is reproduced by head 12 simultaneously with, or shortly after 5 closing of the circuit between pins 24-7 and 24-8 applies 24 v.
DC to coil 29-1 for energizing the latter and hence moving
the reproduction by head 11 of the verbal stop signal in length
La. Further, there is recorded in track 22 of the tape an alert
tone signal, for example, of 400 c./s., in a length L; which
contacts 29-2, 29-3, 29-4 and 29-5 into engagement with
their respective ?xed contact b. Upon engagement of contact
29-2 with its contact b, a circuit is closed from a junction 34
precedes length L, by a distance D, selected so that, at the
standard running speed of the tape T, the alert tone signal in 10 with conductor 32 through a resistor R2, contact 29-2 en
gaged with its contact b and a resistor R, to a junction 35 with
length L, is reproduced a suitable time, for example, 5 to 10
seconds, before the reproduction of the cue signal in length
conductor 33, whereby to hold relay 29 in-its energized condi
Also extending from the ?xed contact b associated with
The tape playback units TPA, TPB and TP,,- are identical and,
as shown on FIG. 2 with reference to unit TPA, each include,
movable relay contact 2,9-2 is a conductor 36 connected to
in addition to the previously mentioned deck assembly D and
the anode A of 'SCR 23. A' capacitor Ca‘is connected between
head assembly 13, an audio ampli?er 14 for amplifying the
cathode K of SCR 23 and ground, and a conductor 37 extends
verbal signals reproduced by head 11, and a preampli?er 15
from the ?xed contact a associated with movable relay contact
for the alert tone'and cue Signals reproduced by head 12. The 20 29-2 to a junction 38 between cathode K and capacitor C6. A
output of preampli?er 15 is applied to ?lters 16 and 17 which
resistor R4 extends between a junction 39 with conductor 37
are designed to pass the 1000 c./s. cue signal and the 400 c./s.
and ground, and a resistor R5 is connected between the output
alert tone signal, respectively. The ?lters 16 and 17 are
of ampli?er 22 and ground to limit the amplitude of the pulse
preferably of the notch-type so as to clip and limit the respec
that can be applied to the gate G of SCR 23.
tive 1000 c./s. and 400 c./s. signals. The 400 c./s. signal 25 It will be seen that, when switch 27 of deck D is closed to
passing ?lter 17 is further ampli?ed, as’at 18, and has its
energize transformer 30 andthus provide 24 v. DC to conduc
volume controlled by a variable resistor 19 prior to passing
tor 32 and through resistor R, to relay contact 29-2, prior to
through a ?nal ampli?cation stage 20 to a loudspeaker 21 by
energizing of relay coil 29-1 the DC voltage is applied through
which the alert tone signal of 400 c./s. is audibly reproduced.
conductor 37 to place a charge on capacitor C6. Thus, if, upon
The 1000 c./s. cue signal passing ?lter 16 is ampli?ed by an 30 energizing of relay 29 to commence the operation of tape
ampli?er 22 having its output connected with the gate G-of a
playback unique TPA‘, head 12 picks up the 1000 -c./s_. cue
semiconductor controlled rectifier (SCR) 23 which is ?red,
signal in the terminal portion of length L, of tract t2 and
that is, rendered conducting from its anode A to its cathode K,
thereby causes momentary ?ring of SCR 23, the charge on
only when gate G receives an ampli?ed 1000 c./s. pulse. As
capacitor C6 prevents the‘ occurrence of such a voltage drop at
hereinafter described in detail, such ?ring of SCR 23 in 35 the connection to resistor R_-, as would result in pulling down of
response to reproduction of the 1000 c./s. cue signal recorded
the voltage below the release level of relay 29 with consequent
on the tape is employed to halt the operation of the tape
opening of the latter. After length L, of track t2 has been
playback unit TPA.
moved away from head 12 in response to energizing or closing
A connector 24 is provided for connecting each tape
of relay 29, the previously applied charge on capacitor C6 is
playback unit to the respective control unit CA, CH or CC of 40
bled off or discharged through resistor R4 with a time constant
console 10, and such connector has 1 l connector pins 24-1 to
determined by the latter so that, when head 12 thereafter
24-11. As shown on FIG. 2, connector pins 24-1 and 24-2
reproduces the 1000 c./s. cue signal from length L4 of tract :2,
receive 120 v. AC and have conductors 25, 26 extending
the resultant ?ring of SCR 23 for a predetermined period, for
therefrom to the motor M of deck assembly D for driving the
usual capstan of the latter. A switch 27 is interposed in con 45 example for one-twentieth second, causes the voltage to be
pulled down below the release level of the relay through the
ductor 25 and is operable by a play-release lever (not shown)
path established through the SCR to' the
which opens switch 27 when the usual capstan pressure roller
discharged capacitor C6. Thus, relay 29 is deenergized or
(not shown) is retracted to permit the installation or removal
of a tape cartridge. Thus, motor M can be operated only when 50 opened to halt operation of tape playback unit TPA at the end
of the time allotted for a respective test.
the play-release lever is manipulated to lock the cartridge on
If prior to the reproduction of the 1000 c./s. cue signal by
the deck and to close switch 27 while extending the capstan
head 12 from tape length L4 there are momentary spurious
pressure roller to a position near to the capstan. The transport
1000 c./s. signals passed to gate G of SCR 23, such spurious
or drive of the tape by the capstan driven by motor M occurs
only when a solenoid 28 is energized to cause ‘the capstan 55 signals are incapable of ?ring the SCR which is selected to be
?red only by a pulse of sufficient duration, for example, of
pressure roller to bear against the driven capstan with the tape
about one-twentieth second duration.
It will further be seen on FIG. 2 that a conductor 40 extends
A relay 29 is provided to control the operations of tape
from conductor 26 to movable relay contact 29-5 and that
playback unit TP, and includes a coil 29-1 and four movable
conductors 41 and 42 extend from the associated ?xed con- _
contacts 29-2, 29-3, 29-4 and 29-5 which engage ?xed con
tacts a and b, respectively, to connector pins 24-3 and 24-4
tacts a when coil 29-1 is deenergized, as shown, and ?xed con
for connection to respective indicator lights, as hereinafter
tacts b upon energizing of coil 29-1. A circuit for energizing
described. A conductor 43 also extends from conductor 25 to
solenoid'28 extends between conductors 25 and 26 and in
connector pin 24-5 which forms a common connection for the
cludes movable relay contact 29-3 and its ?xed contact b and
a DC power supply constituted by diodes D, and D2, capaci 65 lights. The connector pin 24-6 is connected to ground, as
shown, while connector pins 24-9 and 24-10 are connected
tors C, and C2 and a resistor Rl in the con?guration as shown.
by conductors 44 and 45 to the output terminals of audio am
Thus, solenoid '28 is energized to cause the tape to be driven
pli?er 14. Finally, with respect to FIG. 2, it will be seen that
only when relay coil 29-1 is energized to engage contact 29-3
connector pin 24-11 is connected through a conductor 46
with its ?xed contact b.
_ Conductors 25 and 26 apply 120 v. AC to the primary wind 70 with ?xed contact a associated with movable relay contact
29-4 which is connected to a junction 47 between capacitors
ing of a transformer 30, and the secondary winding of trans
C4 and C5 connected between conductor 46 and ground. The
former 30 has a diode D3 and capacitor C3 connected
thereacross, as shown, to provide 24 v. DC at a junction 31
therebetween. A conductor 32 extends from junction 31 to
?xed contact b associated with relay contact 29-4 is shown to
be connected through a resistor R6 with the junction 31 at
apply 24 v. DC to connector pin 24-7 and, for initiating ener 75 which DC voltage is available.
3,579,870 .
Referring now to FIG. 3, it will be seen that each of control
units C4, C8 and CC connected with its respective tape
lated to engage their wipers 56_with the respective ?xed con
tacts A.
playback unit TP,,, TPB or TPC by a connector 24 includes an
When the on-off switch 48 of the control unit C, is closed or
on~off switch 48 interposed in series with a fuse 49 between
moved to its “on” position, “ready" light 53 is illuminated to
connector pin 24-2 and one I20 v. AC power supply line 50, 5 indicate to the examiner at the control console that power is
while the other power supply line 51 is connected to connec
being supplied to the associated playback unit TP, and that
tor pin 24-1 in each connector 24. Further, each control unit
the latter is in condition to operate, that is, its play-release
includes a pushbutton start switch 52 connected between con
lever is positioned to lock the cartridge in place and close
nector pins 24-7 and 24-8, and lights 53 and 54 both con
switch 27. After illumination of “ready" light 53, the examiner
nected, at one side, to connector pin 24-5 and respectively
presses the “start" switch 52 of control unit C, which initiates
connected at their other sides to connector pins 24-3 and
energization of relay 29, and the latter is thereafter held in its
24-4. In each control unit of console 10 there is also a jack J,,,
energized or closed position by engagement of its contact
29-2 with the related ?xed contact b; Closing of relay 29 ener
JB and JC connected with the respective connector pins 24-9
gizes solenoid 28 of the deck assembly to move the capstan
and 24-10, one of which is grounded as shown, with a resistor
pressure roller against the capstan driven by energized motor
R7 across the leads to such connector pins. The jacks JA, 1,,
and 16 are adapted to selectively receive plugs (not shown) for
connecting the same with loudspeakers Sp,, Sp, and Spa.
M, whereby the tape is driven in the cartridge installed on tape
playback unirTPA.
' '
During movement of the tape, head 11 picks up the signals
Further, extending from control units CA , CB and CC are con
in track t, which are ampli?ed in audio ampli?er l4 and
ductors 55A, 55B and 55C which connect with the connector
20 audibly reproduced either‘ at the loudspeaker Sp, orat the
pins 24-9 of the associated connectors.
head phones or earphones at the testing stations TS, and TS,
As shown on FIG. 1, each of station selector switches 5,, S2,
connected to control unit C, inthe example being described.
S,,-S,, includes a wiper or movable contact 56 adapted to be
Thus, the examinees receive the recorded instructions'or
selectively engaged with either an “off” contact which is
grounded, or with one of the other ?xed contacts indicated at 25 directions for taking the test, and then the verbal start signal to
commence the test itself. At the conclusion of the time al
A, B and C. The wiper contact 56 of each station selecting
lotted for the test, the examinees receive the verbal stop
switch is connected to the jack J,, J,, J, or 1,, at the respective
signal. Of course, if desired, the track I, of the tape, between
station, and the conductors 55A, 55B and 55C are connected,
lengths I4 and L3 in which the verbal start and stop signals are
as shown, to the contactsA, B and C, respectively, of all of the
selector switches. Thus, the selector switches S,, 8,, S,-S,, 30 recorded, may contain the actual content of the test where the
latter is to be verbally administered.
can be arranged so that the head phones at the respective test
When tape playback unit TP, is operating, as above, in
ing stations will receive the audio output from any one of con
response to energizing of relay 29, the “ready” light 53 of con
trol units C,,, C, or CC or will be inoperative.
trol unit C, is extinguished and “running" light 54 is illu
Referring again to FIG. 3, it will be seen that the console 10
further includes a bell assembly 57 having a bell 58 and a 35 minated to indicate to the examiner that the related tape
playback unit is iri operation. Shortly before the end of the
striker 59 which is normally spaced from the bell and dis
time allotted for the test, head 12 reproduces the 400 c./s.
placed to strike the latter upon an energization of a solenoid
“aler1" tone signal in length L, of track I, and such signal is
60. In series with solenoid 60 are normally closed contacts 61
audibly reproduced by speaker 21 of tape playback unit TP,,
which open in response to movement of ‘striker 59 by solenoid
60, and a diode D, is connected in parallel with solenoid 60 40 to advise the examiner that the test is about to end.
At the end of the time allotted for the test, head 12
and contacts 61 between conductors 63 and 64 which’ have
parallel branches 63A, 63B and 63C and branches 64A, 64B
and 64C connected with connector pins 24-6 and 24-11 of
the connectors associated with control units C,,, CB and CC,
respectively. Further, a diode D5 is interposed in each of 45
branches 64A, 64B and 64C.
With the arrangement and connections for bell assembly 57
as described and shown, the energizing of relay 29 in any one
of the tape playback units engages relay contact 29-4 with its
?xed contact b so that charges are placed on capacitors C4 and
C5 through junction 47 therebetween. When relay 29 is
deenergized or opens to stop operation of the related tape
playback unit, the charges on capacitors C, and C5 are
reproduces the 1000 c./s. cue signal in length L, of track t2
and, as described above, such cue signal ?res SCR 23 to open
or release relay 29. Release of relay 29 causes deenergizing of
solenoid 28 so that tape movement is halted and striking of
bell 57 to advise the examiner that the test is completed and
that the test papers should be collected. Further, release of
relay 29 extinguishes “running” light 54 and illuminates
“ready" light 53 until on-off switch 48 is moved to its “off"
If two or moreltests are to be administered in sequence to
the same examinees, the instructions and timing signals for
such tests can be recorded successively on a single tape. In
case, at the conclusion of one test, the next test is initiated
discharged through junction 47, relay contact 29-4, conduc 55 that
by again pressing the start switch 52. At the conclusion
tor 46, connector pin 24-11, conductor branch 64A, 648 or
64C, contacts 61, solenoid 60, conductor branch 63A, 638 or
63C and connector pin 24-6 to ground, whereby to cause a
of the sequence of tests, or at the conclusion of a single test
recorded on the looped tape, the tape is returned to its initial
single striking of bell 58 by striker 59.
It will be apparent that, if differenttests are to be simultane
In employing the above-described apparatus for administer 60 ously
administered to a number of examinees, the correspond
ing standard tests, a cartridge having its tape recorded to cor
ing tapes may be played-back on different tape playback units
respond to a particular test is installed on one of the tape
playback units TPA, TPB or TPC and locked in position by ac
tuation of the play-release lever so as to close switch 27 of the
which are connected with respective testing stations or test
rooms. Since the times allotted for the respective tests are au
tomatically controlled by the tapes, there is no possibility that
deck assembly. The pertinent test materials, for example, test 65 the examiner may afford the incorrect amount of time for
booklets and writing instruments are distributed to the ex
completion of the simultaneously administered tests. Further,
aminees who are seated either at certain of the test stations
since the instructions or directions for the tests are recorded
T8,, T8,, TS_,-TS,, or in one of the testing rooms R,, R2 or R,,.
on the tapes, it is certain that all examinees will receive the in
If the examinees are in one of the testing rooms, for example
structions in a uniform and understandable fashion.
in the room R,, the loudspeaker Sp, for that room has its plug 70 Since the examiner is not burdened with timing the tests or
inserted in the jack 1,, 1,, or .I,- of the control unit for the tape
with orally presenting the instructions therefor, the examiner
‘playback unit, for example, the unit TPA, on which the car- '
has time available during the conducting of the tests to per
tridge has been installed. If the examinees are located at cer
form other functions, such as, scoring of previously given
tain test stations, for example, the test stations TS, and T8,,
tests, interviewing of applicants and the handling of employ
the selector switches S, and S3 for such stations are manipu 75 ment applications and references and the like.
7 .
The selectionof 1000 c./s. for the cue signal to halt opera
tion of the playback unit ensures that the test administering
apparatus will not be used for unauthorized playing of
4. A test administering apparatus according to claim 3, in
the SCR 23 will be ?red soon after the commencement of
operation to halt the same. The foregoing would occur even
ment below said predetermined value in response to the oc
currence of a pulse of said cue signal frequency for at least a
which said means to initiate the operation of each playback
unit includes an element causing said operation upon the im-'
recorded music tapes. The selected 1000 c./s. frequency is
position of a voltage thereto of at least a predetermined value,
prevalent enough in all music so that, if a tape cartridge of 5 and said means to halt the operation of the respective
playback unit is effective to pull down the voltage on said ele
recorded music is played on one of the units TPA, TPB or TPC,
predetermined period.
with a two-track tape recorded with music, as one of the
5. A test administering apparatus according to claim 4, in
tracks containing music would be scanned by head 12.
which said means to halt the operation of the respective
Although an illustrative embodiment of the invention has
been described in detail herein with reference to the accom
panying drawings, it is to be understood that the invention is
playback unit is a semiconductor controlled recti?er having its
gate connected to receive said pulse of cue signal ‘frequency
and, when thus ?red, being e?'ective to pull down said voltage
by reason of the conductive path established from the anode
not limited to that precise embodiment, and that various
changes and modi?cations may be effected therein by one
skilled in the art without departing from the scope or spirit of
the invention.
We claim:
to the cathode of said recti?er.
6. A test administering apparatus according to claim 5, in
which a capacitor is connected with said cathode to permit the
voltage to be pulled down below said value only when said
1. In a test administering apparatus, the combination of a
capacitor is discharged at the time of ?ring of said controlled
plurality of individually operable tape playback units each
recti?er, and in which means are provided to temporarily
adapted to reproduce signals magnetically recorded on a
charge said capacitor at the time of initiation of operation of
respective tape while moving the latter at a standardized
said respective playback unit.
speed, said signals recorded on each said tape representing at
7. A test administering apparatus according to claim 6, in
least verbal instructions for a respective test, verbal start and
25 which said tape is in the form of an endless loop and is
stop signals which are spaced apart along the tape by a
returned substantially to its initial position upon the halt of the
distance corresponding, at said standard speed, to a predeter
operation of the respective playback unit, and said means pro
mined time allotted ‘ for said respective test, a cue signal
vided to temporarily charge said capacitor ensure that the in
located along the tape to be reproduced upon the reproduc
itiation of operation of the playback unit will not be disturbed
tion of said verbal stop signal and an alert tone signal located
by the simultaneous reproduction of the terminal portion of
to be reproduced in advance of said cue signal, each of said
said one signal.
playback units including head means to reproduce said
8. A test administering apparatus according to claim 1, in
recorded signals from the respective tape, a control station ad
which said transducer means at said testing stations are for
jacent said playback units and a plurality of testing stations,
utilization by individual examinees, and there are further pro
station selecting means at said control station operable to 35 vided a plurality of loudspeakers selectively connectable to
selectively direct the reproduced verbal instructions and ver
said playback units by way of said control station to reproduce
bal start and stop signals from any of said playback units to
said verbal instructions and start and stop signals in audible
any of said testing stations, transducer means at each of said
form for groups of examinees.
testing stations to convert to audible form the reproduced ver
9. A magnetic tape loop for use in administering a test, said
bal instructions and verbal start and stop signals, means at said
tape having ?rst and second record tracks, said ?rst track hav
control station to initiate the operation of each of said
ing recorded therein along successive lengths signals cor
responding to verbal instructions for performance of the
playback units, means to provide an alert tone audible by an
respective test, and signals corresponding to verbal start and
examiner at said control station in response to the reproduc
stop orders, respectively, said lengths of the ?rst track along
tion of said alert tone signal by any of said playback units,
means responsive to the reproduction of said cue signal by 45 which said verbal start and stop order signals are recorded
being spaced apart by a distance corresponding to the time al
each of said playback units to halt the operation of the respec
lotted for the respective test at a predetermined playback
tive playback unit, and means at said control station to signal
speed of the tape, said second track having recorded therein a
to an examiner thereat that the operation of a playback unit
constant frequency cue signal along a length of the tape which
has been halted.
2. A test administering apparatus according to claim 1, in 50 immediately follows said length in which the signals cor
responding to said verbal stop order are recorded, and said
which said head means of each playback unit includes ?rst and
second track further having recorded therein an alert tone
second heads scanning ?rst and second tracks of the respec—
signal of a constant frequency different from that of said cue
tive tape, said verbal instruction and start and stop signals are
signal and which is located along a length of the tape in ad
recorded in said ?rst track, and said alert tone signal and cue
55 vance of said length containing the cue signal.
signal are recorded in said second track.
10. A magnetic tape loop according to claim 9, in which
3. A test administering apparatus according to claim 2, in
said constant frequency of the cue signal is about 1000 c./s.,
and said constant frequency of the alert tone signal is about
400 c./s.
which said alert tone signal and cue signal are uniform
frequency signals of respectively different frequencies, and in
which ?lter means are provided to separate said alert tone and
cue signals in the output from said second head.
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