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Патент USA US2121835

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June 21s, 1938.
2,121,835
D. F. SPROUL '
BOLSTER SPRING UNIT
Filed Jan. 14, 1957
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2,121,335"
Patented June 28, 1938
lAfc-QQUNITEDSTATES PATENT OFFICE
I
' 2.121.835
BOLSTER SPRING UNIT
Donald F. Sproul, Chicago, Ill., assignor to Card
well-Westinghouse Companyz'a corporation of
Delaware
‘
Application January 14, 1937, Serial No. 120,564‘
9 Claims; (0]. 267-9)
relates to cushioning devices in which is 'slidably mounted the‘ endv of a car
3 5
’ iThis invention
:‘and more particularly .to spring units for use in
bolster iii».
supporting railway bolsters and the like.
‘ported by a springassembly which is indicated‘
v
The bolster I3 is adapted to be sup
One of the objects ‘of the invention'is the pro
“vision of a new and improved spring unit having
generally by the reference character l4 and com—_
prises one or. more helical springs l5 and one or
.novel meansfor preventingharmonic action of
more spring units l6, which engage beneath the ’
the 'unit and of the assembly within which 'itis 7 bolster and are seated on a spring plank Ilcar
ried by the side frame I l, as is usual in such con‘-.
Another object of the'invention is the use of Vst'ructions. Since the detailsfof the construction
a new and improved arrangement of the spring. of the side frame, bolster and spring plank con
stitute no part of the present invention; it is not
elements of a spring unit whereby greater capac
used;
.
g
,
.
ity and e?iciency is obtained for said unit.
‘
A further object of the invention is the pro-'
115
thought necessary to further illustrate or de
scribe the same.
'
'
‘
vision of a spring unit having a new and im
The unit. l6 comprises a follower‘or casing l8
proved spring element together with‘a novel ar
rangement of the elements for providing a resil~
ient support for railway bolsters and the like.
having a closed lower end l9» provided with'a "
central depression as at 2|. The central de
pression is provided with an opening 22 through
- Another object of the invention is the pro
which a bolt 23 extends.
vision of a new and improved spring unit that- is
simple in construction, inexpensive to manufac
ture, easily and readily assembled, and‘ thatis
“ ei?cient in operation.
~
\gQther-and further objects of the invention will
appear fromvthe following description taken in
connection with the accompanying drawing in
Mounted within the
casing and extending above the same’ is a spring
mechanism 24' which comprises a plurality of
112o
disk members ofv resilient materiall For conven- "
jience of description, these disk members vwill ‘be
considered as comprising a plurality of sets' 20
of resilient disks'25 and 26. Each disk is provided
with an axial opening 21 and each tapers in as
thickness‘ from its periphery to said "opening
.which:--.
‘
. ,Fig. 1 is aside elevation‘ of a ‘railway truck,"v whereby the disks may be regarded as‘ being
'
:parts being omitted-and parts broken away for concave on both sides. This arrangement vwill
ephesake of clearness, showing the invention in not only hold the central portion of the disks in
spaced relation when the parts‘ are assembled
"so position therein;
.1 .
;
_,
.
2-15 a-verticalsection of the spring unit but will materially strengthen the peripheral edge
of the disks against rupture or breakage during r
showing the same in expanded position;
. Fig. 3 is‘ a similar view but showing the unit
compressed, and with parts broken away;
v35
Fig. 4 is a sectionon the line 4—4 of Fig. 2; ‘ ‘
1 “Fig.5 is a perspective view of the ‘friction ele
.~ment;_and'
V
,.
~
'
1‘ Fig. 6 is a perspective view of a modi?ed form '
of the friction elements.v
.
-
‘ In-the operation of‘conventional railway cars,
eries of the disks are thin, especially if they be
;conoave, and of the same thickness throughout, 135
' the radial expansion of the disk when pressure is
applied tending to flatten the same, would tend to
tearor disrupt the metal. But by-making the
peripheries of the disks thick and tapering them
toward the center, this tendency is compensated 140
{under certain conditions, ‘the bolster supporting
for in the added thickness of the periphery as
spring assembly will develop a harmonious spring
action unless means-be provided for preventing
well as in the shape of the disk.»
such
45
the compression of the unity Where the periph- _
action.
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:
_
I
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- The present invention’ seeks to provide a spring
'
I
Y
The inner portions of the disks 25 and 26, that
is, the margins of the openings ‘21'v of each‘ set I
20‘ of disks engage rabbbets 28' and 29, respec
unit which may be substituted for one’ or more tivelypin an annular spacer member 3]. The
‘of utheiconventional bolster supporting springs , length of this annular member is such thatrit .
andwhich will not only provide a" maximum load ' will normally hold the peripheral edges of the
supporting, unit without increasing the size of the disks 25 and 26 in spaced relation as clearly
' same,- and .at the same ‘time provide means for shown in Fig. 2 of the drawing. The iopenings
‘preventing harmonic action of the springv as» through the disks and the inner diameter of the
' character. l0 designates a railway truck having a
spacermembers 3| are of such dimensions that
the latter ‘will loosely ?t over the depression 21!
as shown in Fig. 2.
desire??? I.‘ .pl'pvidedwiihe. bolster “opening . i 2
g A suitable‘ follower or cap’ 32.. provided with a‘
semblyn
W
'
@Ivteferring nowito the drawing, the reference
.
2,121,835
?ange 30 and having a depressed hollow centralv more nearly equalized or distributed around and
portion 33 of substantially the same diameter
as the depression 2! in the casing I8, is provided
at the upper end of the unit.
The depression 33
'
It is thought from the foregoing taken in con- nection with the accompanying drawing that the
is provided with an axial opening 34 through
construction and operation of my device'will be
which the bolt 23 extends. The bolt is provided
apparent to those skilled in the art and that
changes in size, shape, proportion and details of
with a nut 35 by means of which the initial com
10
along the casing.
pression of the spring mechanism may be’ ad
construction may be made without departing
justed.
from the spirit andscope of the appended claims.
.
Preferably, though not necessarily, an extra
resilient disk 36 may be provided at the upper
end of the unit for engaging the cap 32. The
inner edge of this disk engages a rabbet in the
spacer member 31 inserted between the inner
15 portion’ of the disk and the cap 32.v The disk 36
is a duplicate of the disk 25 or 26.
Suitable means are provided for creating fric
tion when the unit is compressed in order to pre
vent harmonic action of the spring mechanism.
20 In the form of the device selected to illustrate
'one embodiment of the invention, this is accom
plished by providing an annular friction, shoe or
friction shoes which are adapted to be forced into
engagement with the inner periphery of the eas
25 ing l8 when the unit is compressed. In the form
of the device shown in Figi 5, the friction shoe
3!! is in the form'of a ring or ring-member hav
ing a diagonal split as at 39 and having on its
upper and lower edges, inclined or wedging faces
530 4| and 42, respectively.
These wedging faces
converge inwardly and are adapted to engage
corresponding inclined or wedging faces 43 and
44 of the disks 26 and 25 of adjacent sets of
spring members as shown more clearly in Fig. )2.
135 As shown on the drawing, two of these annular
friction shoes are used but it is understood that
additional or a less number of shoes may be
employed if desired.
When the parts are assembled, the spring
40 mechanism is clamped between the followers l8
10
7
1. In a spring unit, a pair of followers, a plu
rality of resilient. disk members between said
followers, certain of said members being ar
ranged in pairs, and means having a wedging
engagement with the peripheral portion of cer 15
tain of said resilient disk members for frictionally
engaging the interior of one of said followers
when said unit is. compressed.
2. In a spring unit, a' plurality of disk members
arranged in axial alinement, said disks having 20
axially alined openings, a plurality of annular
members, each having an annular rabbet' about
each. end for receiving the inner edges of ad
jacent disk members, a follower cap engaging the
I claim as my invention:—-
end disk members of each unit, certain ofv said
diskmembers havingrwedging frictional faces,
ring members having wedging frictional faces en
gaging the wedging frictional faces of said disk
members, and means for limiting the expansion ‘
of said ring members.
_
3. A spring unit for use in railway cars and
the like, comprising a hollow casing circular in
cross-section and having a closed end, a plurality
of pairs of disks of resilient material within said
casing, said disks each having an axial opening, 3 i
a plurality of spacer members between the inner
portions of each pair of disks, an annular friction
member between adjacent disks of two of said
sets and engaging the inner wall of' said casing,
said friction member and engaging disks being 40
and 32 with the lowermost disk 26 resting on the
provided with cooperating wedging faces whereby
bottom wall l9 ofrthe follower or casing l8 and
with the uppermost disk 36 slightly spaced from
the flange 30 of the upper follower 32.
45
In the operation of the device, when the cap
when said unit is compressed, said friction mem
ber will be forced radially outwardly into fric
tional contact with the inner wall of said casing.
4. In a spring unit, a column of horizontally
arranged resilient disks, a cap member'at each
end of 'said column, means including spacers for
32 is forced downwardly, it will force the spacer
ring 31 downwardly thus tending to distort the
central portion of the disk 36 downwardly due to ‘ holding the inner surfaces of said disks in-‘spaced
the resistance offered'by the peripheral engage
'50 ment of the disk 36 with the uppermost disk 25.
This force in turn will be communicated down
ward through the spacer blocks 3|, disks 25 and
26 and wedges 38, whereby all of the disks will
relation and with the peripheries of certain of
said disks in contact whereby a load'on‘the' top a’
cap member will tend to distort all of said disks,
a casing, and means including members cooper
ating with said disks for frictionally engaging
be more or less distorted, as shown in Fig. 3
said casing for resisting the compression of said ,
which shows the unit closed. The'?ange 30 of
unit.
the follower 32 will engage the upper end of the
follower 18 to limit the compression of the unit.
The compression of the unit will tend to force
the annular friction shoe or shoes 38 outwardly
.60 into frictional contact with the inner surface of
the follower casing l8 thereby not only materially
assisting in supporting the load but at the same
time resisting excessive movement of the load
and preventing harmonic action of the unit.
65 Upon release, the distorted disks 'will tend ,to
resume their normal position, thereby forcing
the cap member 32 upwardly.
Instead of providing the annular friction shoe
38’ with a single split as at '39, it may be pro
70 vided with a plurality of splits as at 46, 41 and
48, as shown in Fig. 6. In other words, instead
of having a single shoe, a plurality of shoes may
15);)
5. In a spring unit foruse in railways cars and
the like, a column of disk members, each of said
members having a thickened peripheral edge, and
spacer members inserted-between thecentral por
tions of certain. of‘ said disks, means including
split rings surrounding certain of said disks and
having wedging faces cooperating with the pe
ripheral portions of said disks'for expanding said
rings ‘upon the compression’ of said unit, and
‘means for frictionally'engaging said rings when
they are expanded.
6. In a spring unit for use in a railway car, a
plurality of resilient members having thickened
outer portions, certain of said members being
arranged in pairs, and a spacer between the mem 70
bers of each pair whereby when pressure is ap
plied to said column, all of said members will’ be
be employed. By arranging the splits 39, 46, 41 7 distorted, certain of said members being spaced
and 48 diagonally across the shoe or shoes, the
apart at their outer edges, shoeshaving wedging
75 wear on the inner surface of the casing'will be faces engaging said edges, and a casing friction
3
2,121,835
allyengaged by said shoes when said unit is
‘ compressed.
'
7.'In a spring unit for use in a railway car, a
plurality of resilient members having thickened
outer portions, certain of said members being
arranged in pairs, spacers'between the members
of each pair, a tubular member encircling said
column, a friction shoejand means for-forcing
, said shoe into frictional contact with said tubular
member when said unit’ is compressed.
portions, certain of said members having wedge
faces on their outer portions, wedge shoes en
gaging said wedge surfaces, and means for spac
ing the central portion of certain of said resilient
members apart, whereby when said unit is com
pressed, said shoes will be forced into'fricti'onal'
engagement with the walls of said casing.
9. In a resilient unit for use in supporting the
body of railway cars and the like, a casing, a
column of resilient disk members, within said 10'
, 8.'A resilient unitj'ior use on railway cars and
casing, and friction members having wedging
the like, comprising a plurality of r'esilientmem
faces engaging wedging faces on said resilient
members for forcing said friction members into
‘ bers arranged in a column, a cap at one end, an
open ended casing surrounding said resilient engagement with the casing.
'
DONALD
Ii 15 members, said members having thickened outer '
‘
F. SPROUL.
15
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