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Патент USA US2406064

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Patented Aug. 20, 1946
2,406,064
~ UNITED STATES
PATENT OFF ‘LIE-E‘
George-E. Datlr, Ghicago, Ill.,' assignor to-
H."
Miner, ‘Ina, Ghicago, Ills-a corporation of Del
aware
ApplicationI'December 4, 1943, Serial-N . 512,862
__
7 Claims.
1
This invention relates to improvements in
shock absorbers, especially adapted for use in
connection with truck springs of railway cars
for snubbing or dampening the action of the
springs.
One object of the invention is to provide a
friction shock absorber adapted for use in con
nection with truck springs of railway cars com
(01. 267-9)
whichv is laterally "offset withrespect to’the'sur
face'II. Theqlower 'end of the post. A'isthus
provided with a transversely extending, later
ally projecting, stop shoulder I3 at the, lower
end thereof between the offset surfaces I I and
I2. A longitudinally extending narrow web I4
projects transversely from the post A at the fric
tion surface side thereof, forming a guide ‘rib
prising a pair of relatively movable and rockable
which cooperates with a groove or slot in the
friction posts; and a coil spring surrounding said 10 post B, as hereinafter pointed out. I They web
posts and opposing relative movement of said
I 4, which forms, in effect, a leg portion, tapers
posts ‘in lengthwise direction, wherein the posts
toward the lower ‘end of the post and terminates
are rocked toward each other by the, pressure
exerted by the surrounding coil spring.
at the shoulder I3,‘as clearly shown in Figure 1'.
The web I4 is located at one side of thecentral
A more speci?c object of the invention is to 15'
vertical axis of the mechanism, that is, to- one
provide a shock absorber, as set forth in the
side of a vertical plane at right angles to; the
preceding paragraph, wherein the pressure of
friction surfaces II and I2 of the post and coin
the coil spring which surrounds the posts is
cident
with the vertical central axis of the
transmitted to the latter to produce rocking
mechanism. The friction post B_has a longi
movement of the same through end followers to 20 tudinally
extending ?at friction surface I5 on the
which the posts are anchored.
inner
side
thereof, slidably engaging the fric
Other objects of the invention will more clearly
tion surface I2 of the post A. The friction sur
appear from the description and claims herein
face I5 is located at the upper end portion of ,
after following.
the post B, and below or inwardly'of. the fric
In the drawing forming a part of this speci?
. tion surface the post is provided with’ a second
cation, Figure 1 is a transverse vertical sec
tional view of my improved shock absorber, said
view being on a central plane. Figure 2 is a
top plan view of Figure 1. Figure 3 is- a trans
verse horizontal sectional view, corresponding
substantially to the line 3-3 of Figure 1, the
spring being omitted. Figure 4 is a top plan view
of the upper follower ring of the mechanism.
Figure 5 is an elevational view, on a reduced scale
of the post, at the left hand side of Figure 1,
looking from right to leftin said Figure 1.
As shown in the drawing, my improved shock
absorber comprises broadly two identical fric
tion posts A and B; a pair of spring followers
C—C; and a spring resistance D.
The friction posts A and B are of identical
design, as hereinafter pointed out. On the outer
side, each post has a laterally, outwardly pro
jecting, semi-circular ?ange It at the base
thereof, the ?ange of the post A being at the
upper end thereof and that of the post B being
at the lower end. Each post is of broadly semi
circular transverse cross section, the base por
tionvthereof, that is, the end portion at the ?ange
In being in the form of a half cylinder. Each
post is preferably tapered toward its outer end, 50
as clearly shown in Figure 1. At the inner side,
the post A presents a longitudinally extending
?at friction surface II at its lower or outer end
friction surface I6, which is offset inwardly
with respect to the surface I5, thereby provid
ing a transversely extending stop shoulder ll’ at
the inner end of the friction surface I5, over
hanging the stop shoulder 1'3 of'the post A and
adapted to engage the‘ last named shoulder to
limit longitudinal separation of the posts A and
B. The friction surface I5 of ‘the post B i's'in
sliding engagement with the friction surface ‘II
of the post A. On the inner side, ‘that’ is, the
friction surface side of the post ‘B, a web 'I8‘is
provided, which is identical'with the web I4 of
the post A and forms a leg for the post. The
web‘ I8 is located beside the web I4 at the other
side'of the central longitudinal axis of the mecha
nism. Each post is provided witha longitudinal
guide groove or slot, accommodating the webof
the other post, the guide groove of the post A,
which receives the web I8 of‘the post B,»b'eing
indicated by I9, and that of the post B, which
receives the web I4 of the post A, being indicated
by 20. The webs or legs l4 and I8 of the posts
A and B are provided with T-heads, adapted to
interlock with the followers C—C, as hereinafter
pointed out, the T-head 2| of the web ‘I4 of the
post A being located at the upper end 'ofrthe
latter and the T-head of the web of the post {B
being located at the lower end of the'latter.
The spring followers 0-0, which are ofsim=i~
and an-upper or inner ?at friction surface- I2, 55 lar design, are located respectively at-the top
3
72,406,064
and bottom of the mechanism at the bases of the
friction posts, respectively. Each follower C is
in the form of a disc having a continuous ?at
annular ringlike ?ange portion 22 surrounding
the base portion of the corresponding post. The
ringlike ?ange 22 comprises a relatively thick
section “23 andan offset thinner section 24. The
section 23 forms one half of the ring and the
section 24 the other half. The entire inner sur
4
to permit the stop ?ange I3 of the post A to
clear the shoulder ll of the post B, and the posts
are forced together until the shoulder |3 passes
the shoulder IT, whereupon the pressure of the
spring will snap the shoulder |3 into position
underneath the shoulder ll, thereby locking the
posts against lengthwise separation.
The improved shock absorber preferably re
places one of the spring units of a truck spring
face of the ringlike ?ange 22, which is indicated 10 cluster, being interposed between the top and
bottom spring plates of said cluster, the posts
by 25, lies in a single horizontal plane, the outer
and spring follower plates of the shock absorber
surface 26 of the half ring section 24 being in
being
with seats to receive the usual
wardly offset with respect to‘ the outer, surface . spring provided
centering projections of the spring plates.
of the half section 23. The inner surface 25 of
the ?ange 22 of each follower‘ C provides an .151 As shown'in the drawing, the follower plate C
of each post and the base portion of said post
abutment face for the corresponding end of the
spring D. The section 24 of the ?ange 22 of- Y' is recessed, as indicated at 30, to provide the
seat which receives the spring centering projec
the upper follower C is in underlying engage
ment with the ?ange ll) of the post A, and the ' tion of the corresponding spring follower plate
section 24 of the ?ange 22 of the lower follower 20 of the truck spring cluster.
The operation of my improved shock absorber
C overlies the ?ange ll) of the post B, as clearly
is as follows: Upon the cluster of the truck of
shown in Figure 1. Each follower C is provided
a railway car being compressed between the
with a pair of webs 2'|—2'| extending laterally
spring follower plates, the shock absorber is com
inwardly from opposite sides of the half ring
section 23 of the ?ange 22. The opposed inner 25 pressed between said spring follower plates, there
by forcing the posts A and B to slide lengthwise
edges of the Webs 2'|-2'| are spaced apart, there
with respect to each other against the resistance r
by leaving a slot 28 adapted to accommodate the
of the spring D. As the mechanism is being
base portion of the web or leg l4 or l8 of the
compressed, the pressure exerted by the spring
corresponding post. At that portion of the fol
lower C having the half ring section 24 of the 30 D On the follower plates C tends to rock or tilt
the posts A and B laterally toward each other,
thus placing the friction surfaces thereof in tight
frictional contact. Relatively high frictional re
sistance is thus produced to snub the action of
the truck springs. As the follower plates of the
truck springs are separated, due to recoil of the
springs, the posts A and B are moved apart
vof the upper follower C, with the T-head 2| en
lengthwise, being carried with the follower plates
gaged over the webs 2'|-—2‘| of said follower in
C-—C to which they are anchored. This action
~shouldered engagement therewith, thereby an
choring the post A to said follower. The post B 40 continues until lengthwise separation of the
?ange 22, a semi-circular opening 29 is provided
through said follower, interiorly of the ?ange 22,
adapted to accommodate the semi-cylindrical
base section of the corresponding post. As shown
most clearly in Figure 1, the post A has the web
‘or leg l4 thereof engaged through the slot 28
is anchored in a similar manner to the lower
follower C by means of the T-head 2| of the
web or leg |8 of said post B. "
The spring D, which is in the form of a single
heavy coil, surrounds the posts A and B and _
has its top and bottom ends bearing respectively
posts is positively limited by engagement of the
stop shoulder l3 of the post A with the stop
shoulder I‘! of the post B.
I have herein shown and described what I now
consider the preferred manner of carrying out
my invention, but the same is merely illustrative
and I contemplate all changes and modi?cations
that come within the scope of the claims ap
on the ringlike ?anges 22-—22 of the top and
bottom spring followers C—C. The spring D is
pended hereto.
under initial compression and holds the followers
I claim:
C-C seated on the -?anges |0-,—|0 of the posts. 50
1. In a shock absorber, the combination with
As shown in Figure 1, the upper face of the
a pair of lengthwise slidable friction posts hav
‘half section 23 of the ringlike ?ange 22 of the
ing shouldered engagement with each other to
upper follower C is offset downwardly, slightly
limit lengthwise separation thereof, said post
with respect to the upper surface of the ?ange
having a supporting ‘base portion provided with
55
10 of the post A," and the bottom face of the
a ?ange at one side and a lateral projection at
section523 of the ?ange 22lof the lower follower
the opposite side thereof; of a pair of follower
C is offset upwardly,’ slightly with respect to the
plates cooperating respectively with said posts,
?ange ll! of the post B. The posts A and B are
said plates bearing on the projections of said base
thusnmounted for rocking tilting movement on
portions of said posts, each follower plate having
their supports, namely, the top and bottom spring 60 a ?ange, with a, portion of said ?ange in overlying
follower plates of the spring cluster of the truck
shouldered engagement with the ?ange of the
‘
base portion of the corresponding post, said base
In assemblingthe parts of my improved shock
portion extending through the corresponding fol
absorber, the follower plates C-C are first ap 65 lower plate and projecting outwardly beyond the
plied to the posts A and B, by dropping the fol
same and a coil spring surrounding said posts,
lowerplate C of each postover the same and
said spring bearing at its opposite ends on the
?anges of said follower plates‘ respectively.
engaging the ?ange section‘. 24 of the ring ?ange
22 withthe ?ange ‘ID of the post, and the webs
2. In a shock absorber, the combination with
a pair of lengthwise slidable friction posts, each
2'|—2‘| over the T-head 2| of the leg of the post.
springs of the railway car.
The spring D is then engaged. over the post B
and seated on the follower C thereof. The post
A isthen insertedwithin' the coil springlthrough
the upper end, while the posts A-and B are
post having a base ?ange at one side thereof and
a leg member at the other side; of a pair of fol
lower plates bearing respectively on the ?anges
of said posts, said follower plates having the legs
tilted away from each otherat their outer ends 75 of said posts anchored thereto; ‘and a coil spring
5
2,406,064
surrounding said posts and bearing at its oppo
site ends on said follower plates.
3. In a shock absorber, the combination with
top and bottom spring follower plates having an
nular ringlike ?anges; of top and bottom friction
posts in lengthwise sliding engagement with each
other, each post having a laterally extending
curved base ?ange at one side and a T-headed
leg at. the other side, each post extending through
t
6
-
posts having base portions mounting said posts
for tilting movement toward each other; of a pair
of follower plates to which said posts are respec
tively anchored at said base portions, said base
portions extending through said plates and pro
jecting outwardly beyond the same; and a spring
surrounding said posts and bearing at opposite
ends on said follower plates.
6, In a shock absorber, the combination with
the corresponding follower plate with the flange 10 a pair
of lengthwise slidable friction posts, each
thereof bearing on said flange of the follower
of said posts having a base portion provided with
and the T-head anchored to the latter; and a
a ?ange, said base portions of said posts mount
coil spring surrounding said posts and bearing
ing the latter for rocking movement toward each
at opposite ends on the ?anges of said top and
other; of a pair of follower plates bearing respec
bottom follower plates.
15 tively on the base ?anges of vsaid posts, said base
4.‘ In a shock absorber, the combination with
portions extending through said plates and pro
top and bottom friction posts having lengthwise
jecting outwardly beyond the same, and a coil
slidable engagement with each other, said top
spring surrounding said posts, said spring bear
post having a leg extending from one side, and
ing at opposite ends on said follower plates.
a, laterally projecting base ?ange on the other 20
7. In a shock absorber, the combination with
side, at the upper end thereof, said bottom post
a pair of lengthwise slidable friction posts, each
having a leg extending from one side, and a lat
post having a base portion rockingly supporting
erally projecting base ?ange on the other side at
said post; of a ?ange at one side of each post
the lower end thereof, said posts being reversely
projecting from the base portion thereof, said
arranged with the ?anges thereof respectively at
base ?anges of said posts being respectively at
opposite sides of the mechanism; of top and bot
opposite sides of the center of the mechanism;
tom spring follower plates through which said
a leg on each post projecting from the side there
posts extend, said top plate being anchored to the
of opposite to the base ?ange thereof; a pair of
leg of said top post and extending underneath
follower plates cooperating respectively with said
the ?ange of said post in contact with said ?ange,
each follower plate being anchored to the
said bottom plate being anchored to the leg of 30 posts,
leg
of
the corresponding post and having a ring
said bottom post and extending over the ?ange
?ange bearing at one side of the center of the
of said bottom post in contact with said ?ange;
mechanism on'the ?ange of said post and offset
and a coil spring interposed between said top and
inwardly with respect to the base portion of said
bottom followers, surrounding said posts and
having its top and bottom ends bearing respec 35 post at the other side of the center of the mecha- '
nism to provide clearance for tilting movement;
tively on said top and bottom follower plates.
and a coil spring surrounding said posts and bear
5. In a shock absorber, the combination with
ing at its opposite ends on said plates.
a pair of lengthwise slidable friction posts, said
GEORGE E. DATH.
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