Vibration and shock isolator
May 18, 1954
N. H. ROY
2,678,796
VIBRATION AND sHocK IsoLA'roR
Filed April 30, 1952
1";
2 Sheeps-Sheet 1
May 18, 1954
N. H. ROY
2,678,796
VIBRATION AND sHocK IsoLAToR
Filed April 30, 1952
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2 Sheets-Sheet 2
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ATTORNEYS
2,678,796
Patented May 18, 1954
ATENT OFFICE
STATES
2,678,796
VIBRATION AND SHOCK ISOLATOR
Nereus H. Roy, Glenbrook, Conn., assignor to
Waugh Equipment Company, New York, N. Y.,
a corporation of Maine
Application April 30, 1952, Serial No. 285,113
5 Claims. (Cl. 248-358)
1
r)This invention relates to yielding mounts to
be interposed between an object and a fixed sup
port, such a mount carrying the weight of the
object and isolating vibration and absorbing
shock. More particularly, the invention is con
cerned with a novel mount especially suitable
for supporting objects, which require unusually
good protection against low amplitude Vibration
in one direction and heavy shocks in all direc
2
shock-absorbing unit within the casing resists
lateral movement of the member and both units
preferably include rubber springs, while the re
silient element of the vibration-isolating means
is preferably a metallic spring.
The new mount is similar to that shown in my
copending application, Ser. No. 262,306 filed De
cember 18, 1951, but differs therefrom in respects
which will be pointed out later.
For a better understanding of the invention,
tions, such objects frequently being of relatively l0 reference may be fmade to the accompanying
light weight. The new mount may be advanta
drawings, in which:
Fig. l is a vertical sectional view of one form
of the new mount;
ment panels, etc., and forms of the new mount
Fig. 2 is a top plan view of the mount of
suitable for Such application will, accordingly, be 15 Fig. l;
‘
illustrated and described in detail for purposes
Fig. 3 is a sectional View on the line 3-3 of
geously employed in marine installations for
supporting such objects as switchboards, instru
of explanation.
On shipboard and especially on naval vessels,
it is important that switchboard and similar
Fig. 1;
Fig. 4 is a vertical sectional View of a second
form of the new mount;
structures be supported on mountings which are 20 Fig. 5 is a sectional view on the line 5-5 of
capable of isolating the structures from the vi
Fig. 4;
`
`
bration of the engines and such mountings
Fig. 6 is a vertical sectional view of a third
should also be capable of protecting the struc
tures against high intensity shocks resulting
form of the new mount; and
‘
Fig. ’î is a View, partly in vertical section and
from explosions, direct hits, and near misses. In 25 partly in elevation, of an installation, in which
addition, the mounting should be of such con
struction that those parts of the mounting, which
isolate vibration, are fully protected against
damage by shock.
The present invention is directed to the proví
sion of a mounting meeting the requirements
stated and the new mount is of simple construc
tion, is easily installed, and functions for indefi
nite periods without requiring attention or ad
justment. The new mount comprises a casing
adapted to be secured rigidly to the support and
a member extending longitudinally of the cas
two of the mounts of the form shown in Fig. 1
are used to support an‘object;
The new mount in the form shown in Figs. 1_3,
inclusive, comprises a casing I0, which includes
a lower cup II having a flat bottom with a cen
tral opening I2 and'a peripheral flange I3 ex
tending laterally at its upper end. The housing
also includes an upper casing I4 similar to cup
I I, but somewhat longer and having a flat upper
end with a central opening I5 and a peripheral
flange I6 extending laterally at its lower end.
The cups are of the same diameter, and they
ing and projecting out of the casing through one
are assembled with their concavities facing
end, the projecting end of the member being
each other and their ñanges in alignment. A fiat
40
adapted to be secured rigidly to the object. The
ring I1 is disposed between the flanges I3, I6 of
member is movable both endwise and laterally
the cups, and its central opening IB is in align
and endwise vibrational movement of the mem
ment with the openings I2, I5 in the cups. Ring
ber is resisted by vibration-isolating means en
il is of the same outer diameter as the flanges,
gaging an abutment on the member and sup
and
a flat ring I9 of the same outer diameter as
ported by a part of the casing. A shock-absorb 45 ring Il is mounted on top of ring I1 and between
ing unit encircles the member within the casing
it and ñange I6. The inner diameter of ring i9
and acts through an abutment on the member,
is substantially greater than that of the aligned
after an initial travel of the member against the
openings through the cups and ring il. r:the
resistance of the vibration-isolating means, to
assembly of the cups and rings is secured to
50
resist further movement of the member in that
gether by bolts 20 extending through aligned
direction. The shock-absorbing unit is seated
openings in the flanges' of the cups and in the
on the end of the casing, through which the
rings.
member projects, and, when it is functioning,
A rod 2I extends through the openings I2, I5
the vibration-isolating means is inoperative and
in the cups, the central opening I8 in ring Il,
no forces are transmitted through it. A second 55
3
2,678,796
and the ring I9, and the lower end of the rod
below the bottom of cup || is shouldered and
encircled by a collar` 22 engaging the shoulder
and of less diameter than opening I2. At its
upper end, the rod is also shouldered and en
circled by a washer 23 of less diameter than open
ing |5 and held against the shoulder by a nut
24 threaded on the Iend'25 of the rod. The lower
end of the rod is to .be connected .to the object
4
tion shown and the position in which it en
gages the top of the upper spring disk 35, is
greater' than the amplitude of the vibration, to
which the object is normally subjected. In the
event that the support is subjected to a heavy
shock, which causes the member 2| to move
down against the resistance of spring 38, fol
lower `39 _ñrst engages .and flattens spring disks
to be supported, and the connection is made by 10 S5, and thereafter the shock-.absorbing unit 29
resists further downward movement of the rod
an arm 26 having an opening through which the
and
follower 39. The flattening of disks 35 oc
rod extends, the arm being held against _Collar _22
curs
before the Ycoil spring 38 has gone solid, so
by a nut 2ï threaded on the lower end 28 of the
that, when shock-absorbing unit 29 is function
rod.
The lower cup || supports a Ashock-absorbing ,15 ing, the vibration-isolating means is out of ac
tion.
¿the 4shook is in the direction with the
unit 29, which encircles rod 2| and is made
support moving downwardly, abutment 22 on
up of a plurality of rubber springs .each consist
the _rod engages the lower follower 33, and the
ing of a flat metal ring 30 having rubber rings
shock-absorbing
unit 29 moves upwardly until,
3| applied to opposite faces thereof and con.
neoted together' through openings in the metal 20 in ,an extreme oase, the upper spring disk 35
ring. Adjacent rubber ¿springs are separated by
a nat metal .divider ring 32. The shock-absorb
ing unit shown is made up of four rubber springs
and the unit .extends through the openings in
engages the upper follower' 39. The follower
39 then moves »up _into contact with the top of
cup |4, and, thereafter, the shock is absorbed
first by spring disks 35 and later by unit 29.
modified form of the new mount shown
rings il and i9. The lower end of the unit _en 25 in The
Figs. 4 and 5 .comprises an upper cup 43 hav
gages the lupper surface of a flat follower ring
ing peripheral flanges .44 resting upon a flat
33, »which encircles rod 2| and rests on the inner
ring .45. The mount also includes a lower cup
side .of the lower end of cup il. The follower
45 having a flange 4J engaging the lower sur
is engageable by collar` 22 von the rod, when the
face of ring 45, and _the cups and ring are se
rod moves upwardly a sufficient distance.
30 cured together .by bolts 48 passing through open
_A hat follower ring 34 rests upon the top
ings in the flanges and ring. ,ln securing the
rubber spring of unit 29 and a pair of dished
mount to support 4.9, -an opening 50 is formed yin
metallic disks
,mounted with vtheir concavities
the support, Athe lower cup is passed through
opposed and of the type known as Belleville
the
opening, and the mount is then attached
springs, encircle _the rod and rest on _top of fol 35 to the
support cby bolts 5| passing through
lower 34.
'
aligned _openings Ain the support and the flanges
The lower cup contains a Second shock-absorb
and ring. The object to be supported is con
ing unit 35, which has the form of a rubber
nected
by _an arm _5:2 to a `rod _53, which passes
sleeve lying within .the Ycup against the inner
through aligned openings 54 and 55 in the lower
cylindrical surface thereof and extending -from
end of .cup .46 and ring 45, respectively. The
the bottom >of 1the `cup Ato engage the lower sur
lower end of the rod is of reduced diameter _to
face of disk Il. The sleeve has an inner di
form a vshoulder engaged by va collar 56 serving
ameter somewhat greater than the outer di
als a lower abutment yand the rod extends through
ameter of follower >3,3, but is engageable with
the collar and then „through an _opening in arm
the follower, when the latter is moved laterally
5,2, and is held in place by a nut 57 threaded
with rod 2|.
on the lower end 5_8 of 4the rod. A shock-absorb
rl‘he upper c_up I4 >contains vibration-isolating
ing unit _59, made _up of rubber springs 60, sepa
means 3l including _a ,coil _spring _38, which en
rated
by divider plates ,6|, rests on a lower fol
circles rod 2| îand the upper end of the shock
lower
d2 which encircles rod 53 and is seated
absorbíllg .unit A29 and is seated at its lower end 50
on the lower end of .cup 46. The shock-absorb
on .top of ring >Il within ring I9, the latter ring
ing ,unit .extends upwardly through ring 45 and
serving _to center the lower end of the spring.
into
the _upper cup ,43. At its upper end, the
The spring extends >_upyiïlardly v_above the top Yof
unit carries an upper _follower 63.
the spring disks 35 and, at its upper end, sup
At its upper end, the rod v53 carries a Acup
ports a flanged follower disk 39, which is held 55
by Vthe spring in `contact with the inner surface
shaped follower 5_4, which is held against the
port 49 by having its _lower cup inserted through
shoulder 4on the >rodby ,a ,nut ¿l5 threaded on ,the
upper ,end 6_6 of the rod. A hanged follower 61
encireles the IîQdßJld rests O_n the top of follower
42, which pass through aligned openings in the
support, _the cup flanges i3, |6 and the rings
I‘l and i 9. The object is Vthen connected by
arm 2S to rod 2_1, and the weight o_f _the object 65
is thus normally _taken by spring _38 of the vibra.
tion-isolating means. The collar _22 forms a
mounted on rod ,5,3 .between _followers 64 and U,
if desired. FOLIOWSXS „64 and .ST and ,the spring
washers 69, when used, act as an «upper abut
ment on _rod 53,
The mount includes a .unit l0 for absorbing
of Washer '23.
In use, the mount is .attached to a _rigid sup
an opening 4| through the support, and the 60 6_3. A _coil .Spring .G8 Abears against followers 64
and _67 and, .with them, forms a vibration-isolat
mount is then secured to the support by bolts
lower abutment on rod r_2_| _and the washer `23,
nut 24, and _follower disk
_ _
form
ine unit- Dished `.Spring Washers 69 may be
horizontal ,components .of shock, ,the unit consist
ing _of a rubber'sleeve _mounted within cup d6 .and
extending from .the lower `end ,thereof to the un
_39
an upper ,abut
nient on the rod.
70 dersurface of _ring__45. I_n vthe construction shown
In the normal operation _of the mount, vibra
in Figs. 4 and 5, ,the yibration-isolating „means
tion of the support is isolated by the alternate
is supported by <the _shock-absorbing unit, which
compression and expansion of the coil spring
is, in turn. supported .bythe lower end .of Cup 46.
38, and the mount is s_o constructed that the
travel of follower -3_9 _between its normal posi 7,5 The Shock-absarbine .unit ,is much .stiffer than
the ymetal spring ,6,8 .of .the vibration-isolating
2,678,796
means, so that vibration is isolated substantially
entirely by spring 58.
The device shown in Figs. 4 and 5 functions in
the same manner as that shown in Figs. 1-3, in
clusive, with vibration isolated by the isolating
means including spring t6, and shock absorbed
by units 59 and 65. However, the shock-absorb
ing unit E@ of the device of Figs. 4 and 5 acts to
absorb shocks in one direction only, namely,
shocks tending to move the unit upwardly relative
to rod 53.
The form of the new mount shown in Fig. 6 is
similar to that shown in Fig. l, except that the
isolating means 86, 31 in the upper and lower
mounts, respectively, while shocks in either ver
tical direction as well as horizontal components
of shock are absorbed by shock-absorbing units
in the respective mounts. Mount 16 functions in
the manner described in connection with the
mount described in Fig. l, while mount ’59, which
is upside down, functions in the reverse manner.
The mounts of the invention are frequently
used in oppositely disposed pairs, as shown in
Fig. 7, and, with such an arrangement, the shock
absorbing unit of each mount, which is made up
of a plurality of rubber springs, acts to absorb
shocks in one direction only. The unit may, ac
cordingly, be seated at one end on the casing and
vibration-isolating means 3l’ includes a coil
spring S8’ encircling rod 2l' and bearing at its
lower end on the outer surface of the upper end
oi upper cup i3. Rod 2l’ carries a collar 23’
bearing against a flanged follower disk 39’ which
rests on top of spring 33', the collar 23’ and the
extend lengthwise of the casing for the greater
part of the length thereof, so that the unit has
large capacity. Thus, in the mount shown in
Fig. l, the unit 29 is seated on the lower end of
the casing and extends up through the central
opening iii in the flat ring Il and past the mid
disk 39’ forming an upper abutment on rod 2|’.
The rod carries an intermediate abutment ld,
which is movable through an opening in the top
point of the upper part of the casing. When the
amount is used with a similar mount as a pair,
of cup lf3. The vibration-isolating unit is en
the unit 29 in each mount absorbs shocks tend
closed within a cup "l5, which telescopes over the
ing to move the mount toward the follower 35i in
upper end of cup 'i3 and is secured thereto by 25
the mount.
bolts 'i5'. The lower cup l l’ has a flange secured
The mounts shown in my copending application
to the flange of upper cup 13 and a ñat ring iii’
may be provided with a pair of shock absorbing
interposed between the flanges. The flanges and
units made up of rubber springs and bearing
ring are secured together by bolts 2li', and the
against opposite faces of a central partition be
mount is secured in an opening in support fic’ 30 tween the two parts of the casing. One unit of
by bolts A2’ passing through the support and the
the pair in each mount absorbs shocks in one
flanges and ring. The lower cup Ii’ contains a
direction and the other absorbs shock in the other
shock-absorbing unit 36’ in the form of a sleeve
direction. Each unit has much less capacity than
ofl rubber, and a shock-absorbing unit 2Q’ made
the single unit employed in the mounts of the
or
up of rubber springs and divider plates encircles
un
present application. The prior mounts are, ac
rod 2l’ within cups il’ and 13. The shock
absorbing unit 29' rests upon a lower follower 33’
seated on the lower end of cup Il’. The unit
carries a follower Sil’ at its upper end, which is
` cordingly, for lighter duty than those of the pres
of greater diameter than the opening through the
40 ing shock between an object and a support, which
top of cup i3. The rod 2l’ is provided with a
collar 22’ serving as a lower abutment at its
lower end beyond the bottom of cup Il', and one
end of an arm 2'5’ is mounted in the lower end
of the rod and held in place by a nut 2l’. The
other end of arm 28’ is to be connected to the
object.
ent application.
ï claim:
l. A mount for isolating vibration and absorb
comprises a casing having an internal circumfer
ential shoulder between its ends, means for rig
idly attaching the casing to the support, a mem
ber extending longitudinally of the casing and
projecting through one end of the casing, the
member being movable endwise and laterally,
means for securing the exposed portion of the
member rigidly to the object, an abutment on the
The mount shown in Fig. 6 functions as fol
lows: Vibration is isolated by the isolating means
member within the casing, vibration-isolating
including spring 3l'. 1f the mount is subjected 50 means encircling the member within the casing
to a shock tending to move the support upward
and acting through the abutment to resist end
relative to rod 2i', the follower 34' will engage
wise movement of the member out through said
the abutment 's4 on the rod, and the shock will
end of the casing, a shock-absorbing unit encircl
be absorbed by unit 29'. If the shock occurs in
ing the member within the casing and normally
the reverse direction, follower 33’ will engage 55 having one end seated on said end of the casing,
collar 22’ on the rod, and when follower 34’ is
the unit extending through the shoulder and hav
engaged by the top of cup 13, unit 2S’ acts to
ing its other end opposed to and normally spaced
absorb the shock. Any horizontal component of
from the abutment, the unit being laterally mov
the shock will be absorbed by unit 36’ engaging
able with the member, and a second shock
absorbing unit within the casing surrounding the
follower 33’.
60
A typical installation employing two of the
ñrst unit and the member and resisting lateral
mounts of the construction shown in Fig. l is
movement of the ñrst unit and the member.
2. A mount for isolating vibration and absorb
illustrated in Fig. ’7, in which the upper mount
ing shock between an object and a support, which
lâ is attached to the upper part of framework
member Tl' secured to the fixed support 1S, and 65 comprises a casing having an internal circum
ferential shoulder between its ends, means for
the lower mount 'ES is reversed in position and
rigidly attaching the casing to the support, a
secured to the lower part BQ of the framework.
member extending longitudinally of the casing
The object O is secured to a frame having bars
and projecting through one end of the casing, the
8l and 82 connected to the rods 83 and 64 of
member
being movable endwise and laterally,
the upper and lower mounts, respectively. In 70
means for securing the exposed portion of the
the mounts, the shock-absorbing units have been
member rigidly to the object, an abutment on the
indicated by oblong figures containing crossed
member within the casing, vibration-isolating
diagonals, one such ñgure being designated 85.
means encircling the member within the casing
In the installation shown in Fig. 7, vibration in
and seated on said shoulder, said means acting
75
opposite directions is isolated by the vibration
2,33%,799
throngh the ,ebntinent to resist :endorse nieve
casing,
inent .of o,theshoe ersobbing
Íont through
¿unit encircling
end of. the
nreinber within t...e - sing enti norrnelly having
one enti .eegted
.- id .one .of the Aeasing, ythe
unit extending :throngh the ehoulder
hei/ing
its other enel opposed to end normally silenced
irorn .the .abutmentJ the unit being leiteraily .mov
able with the member, emi .e .seconei shbolrfgb
sorbing .unit with-in the 4c sing ein" riding the ~
first .unit enel the n.1 nib y
movement .o_f. the -ii
3- .A mount ¿or isoletingnibration and >absorb
ing shock .between an ,object end .a support, which
.comprises .a oesing'neving an .internal circumfer
entigl .shoulder between .its ends, means .for .rigF
idly .attaching .the cesing to the .supportJ a meni
bei' extending ¿longitudinally .of the .casing and
projecting through »one end oi the casing, the
meniber being Vmovable ennui-se .and laterally,
means. -for .securing the exposed portion .of the
member rigidly to Y,the object, en abutment on
the ,member >within 4,the easing, .e .coil spring .err
circling the member within ,the .easing >and hav.
ing its .ends .engeging the .abutment .and seated
on the shoulder, respectively, the spring acting
through :the abutment to resist encitvise move
nient .of .the ineinber »out through said `enel .of
the casing, ,a snoek-.ebsorbing unit encircling the
member .within the vcasing .and normally having
one .end .seated o_n ~saicl end of .the casingJ .the unit
ing megnsencirciing the .wher Within the eas
ing and acting through the abutment to resist
eniiwise .movement of the ¿member out through
said end. of the cesing, a ¿Shook-absorbing unit
including a group »of .rubber springs encircling
the :member Within the easing with one end of
the _group normally seated on seid end of the cas
ing ...and the .other `end of the group opposed to
ansi normally .spaced .-.from »the abutment, the unit
through ,the shoulder land being laterally movable with the member, and a second
shock-„absorbing Í:unit ~Within the casing surround
ing the .nrst unit and >the rneniber end resisting
lateral movement of the >tiret unit and the inem
ber.
.5. Amount vfor isolating vibration and .absorb
ing shookbetween -a-n object end a support, which
comprises '_a casing, .means .for ,rigidly attaching
.the casing to vet support, e 4member extending 1on
gituiiinally of the ìboeing .and projecting through
one end ef the casing, the :member being Inova-ble
eriçiwise and laterally, `meins _for securing the
exposed portion oi the member rigidly to the
object, .en abutment on .the member within the
vibration-isolating means encircling the
meinber- ivithin the .casing .and acting through the
abut eht _tp resist en_dwise movement of the
member out through lsaiol 4enel `.of the casing, a
shoclefebsorbing >unit encircling the member
within 4...he .casing .end nerinelly .having one end
seeted
`~said enel oi .the 4veasing »and .its other
eno .opposed to and .spaced .from .the ebu-tnient,
extending through the should-er end having .its
other end opposed to .and normally .spaced from
the iinit being .laterally .movable with the rnernber
the ebutrnent, .the :unit being lateral-1y movable
and
enclosing the vgreeiter portion oi the length
with the member, .anti a ,second shook-absorbing @ oi the
member between the abutment .and said
unit within .the easing surrounding .the nist unit
end zo_f the .ca-sing, .and a second shock-absorbing
and the ,member end .resisting vlatei‘e'l movement
unit :within the cosine surrounding .the ñrst runt
of the first unit and the member.
enel
the .member end :resisting lateral movement
4. A mount for isolating vibration and :absorb
ing shook between en ,object end .a support, .which 40 of the first nnit and meinber
comprises e .cesing .having Aein .internal circuiti.
Eeferenoes Cited `in the ñle 0f this patent
ferentiel .shoulder between :its ends, means for
'UNITED STATES ‘PATENTS
rigidly .attaching the .casing .to the support, a
member .extending longitudinally of the casing
Number
Name
Date
and projecting through one .end of .the casing,
2,010,623
Bugatti _T ____ __v__„__ Aug. 6, 1935
the member being ymovable Áenclxvise .end laterally,
2,356,962
`Williams ______,_`„__,_ Aug. `29, 1944i
megms _for securing `the .exposed portion .of .the
member rigidly -to v_tigre object, am abutment on
the member .Within .the casing, >vibration-1'solai-t:
2,402,400
2,520.44?
'Hewitt et al _______ __ June 18, 1946
Schwartz --..- ---- -if- Aug- .2.9, `19.50
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