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Патент USA US2404637

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Original Filed Sept. 27, 1941
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Patented July 23, 1946
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Lloyd B. `iones, Hollidaysburg, Pa., assigner to The
Pennsylvania Railroad Company, Philadelphia,
Fa., a corporation of Pennsylvania»
Original application September 27, 1941, Serial
No. 412,615, now Patent No. 2,322,642, dated
June 22, 1943. Divided and this application
Merch 4, 1943, serian No. 477,948
3 Claims.
This invention relates to cushioning means use
ful more particularly in connection with the draft
gears of railway cars, the present application be
ing a division of a copending application, Serial
(ci. 213-49) ’
I 6, lil respectivelyY of the draft stop Castings I 3
and l ¿l generally in the same manner as the me
tallic spring type buffer units heretofore ordinar
ily employed. As shown, each cushioning unit I5
No. 412,615, ñled by me on September 27, 1941, Ui includes a multiplicity of rigid T-section pressure
which application issued as Patent Number
bars I8 of which the tongues have their opposite
2,322,642 on June 22, 1943.
side faces roughened or corrugated as best seen
My invention has for its chief aims to effec
in Figs. 3` and 4, said bars being preferably of
tively prevent the transmission of high-frequency
metal and'arranged in pairs of opposing rows or
Vibrations, originating in draft gears, to the car
groups with the tongues of the bars of one group
bodies, and to attain this objective with absence
extending into clearance intervals between the
of objectionable grating noises such as ordinarily
head flanges of the bars of the other group.
attend the operation of draft gears.
Lodged between the tongues of adjacent reversely
Another aim of my invention is to secure the
positioned pressure bars I8 of the Opposing groups
above advantages in a compact self-contained
are smooth-surfaced plain section elongate‘resili
cushioning unit which can be substituted in
ent bars or slabs IS of rubber or the like, one
standard draft gears in place of the usual types,
of which latter is separately illustrated in per
without necessitating any changes whatever in
the construction of the draft gears or interfering
with their normal mode of operation; and in
which the shocks are absorbed by resilient ele
ments of rubber or the like acting in compression
as well as in shear when subjected to load. Thus,
advantage is taken of the well known character
istics of rubber which has superior work absorp
tion qualities in shear as compared with pure
How the foregoing and other objects and im
portant advantages can be readily realized in
practice will appear from the following descrip
tion of the attached drawing, wherein
Fig. l is a fragmentary view in horizontal sec
tion of a conventional railway car draft gear in
which a pair of my improved cushioning units is
spective> in Fig. 5, said bars I9, having -their op
posite longitudinal edges abutting the shoulders
afforded by the head fianges of such adjacent
pressure bars. From Fig. 1 it will be seen that a
rigid separator plate 20, preferably of metal, is
interposed between each row of opposing pressure
bars I8 and associated resilient slabs I9 and that
' the whole pack is snugly enclosed in a tubular
housing element 2l (Fig. 6) which is rectangular
in cross section and aligned in the direction of
draft. The casing member 2l is closed at the op..
posite ends by cover plates 22 and 23, which, like
the separator plates 2Q, are capable of free move
ment within said housing. The cushioning units
l5 can be withdrawn downwardly, together with
the draw bar I2, from between the draft stop cast
ings l 3 and E4 upon removal of the usual retain
35 ing plate 25 which is bolted to the bottom flanges
Fig. 2 is a cross section of the organization
of the center sill channels I0 and II. As shown
taken as indicated by the angled arrows II--II in
each housing element 2l is disposed in an open
Fig. 1.
ing of the yoke bar I2 and has its protruding side
Fig. 3 is a fragmentary detail view correspond
portions fitting between the shoulders of opposite
ing to Fig. 1 drawn to a larger scale.
40 recesses I6 in the stop castings I3.
Figs. 4, 5 and 6 are perspective views of certain
With the parts constructed and arranged as
of the component parts of one of the cushioning
described, it will be seen that as pull is induced
in the draw bar I2, for example from the left in
In Figs. 1 and 2 of these illustrations, the usual
Fig. 1, the housing cover plates 23 of the two se
laterally spaced side channels of the center sill of
rially positioned cushioning units I5 will be
a standard form of railway car are indicated at
obliged to follow suit. This movement will be
Ill and Il, the yoked draw bar of the draft gear
yieldingly resisted through coaction of the oppos
at I2, and the draft stop castings at I3 and Ill,
ing pressure bars lll of the several layers -with the
the latter being rigidly secured to the innerfaces
respectively of said sill channels either by riveting
or welding.
respectively associated resilient slabs I9, and the
shock progressively transmitted from one layer
to the next in each unit through the medium of
The cushioning units of my invention, each
the separator plates 2li until it is ñnally absorbed.
designated comprehensively by the reference
character I 5 in Figs. 1 and 2, are proportioned to
On the other hand, when the draw bar I2 is
drawn to the right in Fig. 1, the movement will be
fit into the transversely aligned pocket recesses
gradually absorbed in* a like manner, through
initial movementl of the housing cover plates 22
of the two units, and communicated» progressively
to the resilient slabs I9 in the several layers by
the rigid bars I8 likewise through the medium
of the separator plates 20. Due to enforced lat
eral expansion incident to being compressed, the
resilient slabs I9 are gripped bythe roughened
4 ,
. yoke opening in the
draft bar; and resilient
means comprising a plurality of compacted, com
pressible and intervening rigid elements which
are separable both longitudinally and transverse
ly of the center sill interposed between said end
plates Within the housing to maintain said plates
`yieldingly in engagement normally with the re
side faces of the tongues of adjacent opposed ` spective stop shoulders of the respective pairs.
2. The invention according to claim 1, wherein
rigid bars I8 in the several rows and placed in
shear, the resistance offered varying proportion 10 V»tine resilient means includes groups of opposing
ly-'arranged rigid pressure bars of T cross section
ately to the degree of pressure imposed.V The
having tongues with roughened side faces, the
cushioning units I5 will thus operate silently in
tongues of one group extending into clearance
preventing the transmission to the car body of
intervals between the head flanges of the bars
sudden shocks and noises caused by spasmodicV
of .the other group; and elongate slabs of rubber
movements of the draft gear.
orthe like individually positioned between the
-While I have herein shown the barsA I8 and YI9»
tongues of adjacent pressure bars of the two
as being vertically arranged, they may, if desired
groups with their longitudinal edges overlapped
or found more convenient in practice be horizon
by the head flanges of the adjacent bars and with
tally placed without sacrifice of any of the ad
20 their side faces contacting the contiguous side
vantages hereinbefore pointed out.
faces of the tengues of such adjacent bars.
Having thus described my invention, I claim:
3. The invention according to claim 1, wherein
1; Cushioning means for use'in a draft gear
the resilient means includes a transverse row of
having a yoked draft bar and pairs of longitudi
vertically-positioned opposingly-arranged groups
nally spaced stop shoulders arranged along oppo
of rigid pressure bars of T cross section having
siteïsides of the draft bar in ñxed relation to the
tongues with roughened sides, the tongues of one
underframe of the car, said cushioning means
group extending into clearance intervals between
comprising a tubular housing element aligned in
the head ñanges of the bars of the other group;
the direction 0f draft and disposed within the
yoke opening in the draft bar with the project
ing side portions thereof fitting into the intervals
between the respective pairs of stop shoulders and
thereby held against movement in the assembly;
cover plates slidable within and closing the oppo
site ends -of the housing element and adapted to
be abutted by the opposite end surfaces ofthe
and elongate slabs of rubber or the like positioned
between the tongues of adjacent bars of the two
groups with their longitudinal edges overlapped '
respectively by the head flanges of the adjacent
bars and with their side faces contacting the con
tiguous side faces of such bars.
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