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Patented Sept. 17, 1946
2,407,875
UNITED STATES PATENT OFFICE`
2,407,875
RAILWAY CAR TRUCK
William A. Geiger, Chicago, Ill., assigner to
William P. Sidley, M. F. Back, Albert P.
Withall, Edwin C. Austin, and George A.
Johnson, all of Chicago, Ill., and Alice T. Miner,
Chazy, N. Y., as trustees of The William H.
Miner Foundation
Application July 13, 1944, Serial No. 544,664
7’ Claims.
(Cl. 105-197)
1
2
l This invention relates to an improved railway
car truck, and particularly to an improved bolster
snub-hing means therefor.
One of the objects of the inventionv is to pro
frame and fo-r other purposes not directly con.
cerned with this invention.
_
vide `a snub'bing or shock-absorbing means for
The bolster opening D is bounded at the top by
a top wall I5 and at the bottom by the spring
seat C', and at its sides or ends by the vertical
walls I6, except at the upper narrower portions
the bolster which is adaptable to the side frames
of the truck without the necessity of materially
which are left open. in accordance with my in
changing or enlarging the usual frame and
vention for the snub‘bing mechanism, these. walls.`
bolster.
all being integral with and connecting the two`
More specifically, my object is to provide with 10 side wallsl of the frame.
in the confines of the Walls of the side frame,
The end of the bolster is positioned, between
snub-hing or shock-absorbing means which fric
the end margins of the upper portionof the. open
tionally acts upon the side walls of the bolster
ing and is guided thereby for vertical movement`
to dampen the vertical movement of the bolster
in the frame. The bolster is provided with guide
in> the frames.
15 lugs ll `Winch embrace the outside. of< the` sidev
Other' objects of the invention will appear from
wallsY of the frame to prevent endwise movement
the following description and claims in connec
of the bolster. The lower portion of the opening
tion with the accompanying, drawing.
is wider so that in assembling, the bolster can
Referring to the drawing, '
Ibe inserted endwise into the opening and',th_en
Fig. 1 is a vertical outer face view of the cen 20 raised up into position. This portion of the open
tral portion of one side of a railway cai` truck
ing also provides space for the bolster supporting
showing the associated side~ frame, bolster and
springs C. As is well known in the art, the
spring cluster; and illustrating my improved
springs C aregenerally in the form of coil springs,
a plurality of which are arranged in a nest, or
snubbing means in connection therewith ;`
Fig. 2 is a horizontal section on the line 2-2 25 cluster and positioned between the bolster and
the spring seat C', thus providing a yielding sup'
of Fie'. 1;‘
Y
port for the bolster.
Fig. 3'i`s a view similar> to Fig: l, illustrating a
The bolster end portions are generally rectan
«modified form of snubbing mechanism;
Fig. 4 is a horizontal' section on line 4_4 of
gular in section and are formed as hollow castings
Fig. 3; and
30 having horizontal top and bottom walls I8 and
verticalv side walls I9 which lie adjacent the mar’
Fig. 5 is a View similar to Fig. 1, illustrating
gins of the bolster openings and which, in accord
still another modiñcation of snub-hing mechaance with my invention, provide friction faces
nisrn.
upon which the snubbing mechanism acts.
In the drawing, A indicates one of the sidíe
In the structure shown in Figs. l and 2, the
frame. members ofr a railway car truck. As will 35
friction shoes or members are in the form of bell
be understood by those skilled in the art,_ a rail
cranks or L-shaped levers with iplates 2l) and 2l
way car truck includes- two side frame members
disposed at right angles and joined by webs 22
A, a transverse truck bolster B, a spring seat C’
in the lower portion of each frame, and a spring
cluster C supporting each end. of` thebolster for
vertical, movement.
The` usual side frame has a central opening D
therein, thelower portion of which is wide enough
to admitthe bolster endwise. for assembly and dis
assemblycf the parts, and the upper portion of
which is- narrowed to thewidth of the bolster to
guide the 'bolster in its. movement.
The usual side frame» is in the formy of a casting
which in general comprises two vertical side walls
II spaced apart in parallel relation and joined
by top and bottom walls I2 and I3 respectively.
Openings I4 are generally provided in the side
walls, which communicate with the space be
tween the walls for access to the interior of the
through which the pivot bolts 23 extend to form
40 fulcrums for the levers. The levers are positioned
between the side walls of the frame in the upper
portion thereof, and the pivot bolts are supported
by these side walls.
The friction shoes or plates 2| are substantial
45 ly parallel with the bolster end Walls I9, and are
maintained in frictional engagement with the
bolster side walls by springs 24. These springs 24
are seated upon the `horizontal plates 20 ofthe'
bell cranksv and are ‘placed under compression
50 between these plates 20 and the top wall I2 of the
side frame and thus act to swing the bell cranks
about their fulcrums and force the friction shoes
2l against the bolster end walls I9. While the
spring means may be of any suitable form for'theV
55 purpose, I prefer coilV springs for* this purpose;
2,407,875
3
4
Centering lugs 25 are provided on the horizontal
said bolster, pivotally mounted friction shoes in
said frame positioned adjacent the side walls of
plate members 20 and on the inner face of the
top wall 2 of the frame to hold the springs in
place.
the bolster, and having arm extensions above
the bolster` and spring mechanism independent
In the structures shown in Figs. 3 and 4, the 5 of said bolster supporting spring means posi
bell cranks are somewhat in the form of ice tongs
tioned between the arm extensions and the frame
fulcrumed upon a common pivot bolt 21 and
‘above the bolster acting on said arm extensions
mounted in the frame above the center of the
to force the shoes into frictional engagement
bolster. In this form, the spring pressed arms
with the bolster to snub the movement of said
28 of the bell cranks extend horizontally in oppo
bolster.
site directions and are positioned above the bol
2. In a railway car truck, the combination ofV
ster and the springs 24 are positioned under
a side frame comprising side walls spaced apart
compression between these arms 28 and ñxed
and having a bolster opening therethrough, a
seats 29 formed on the inner faces of the frame
bolster disposed transversely of the truck and
side walls and extending crosswise thereof.
guided for vvertical movement by the Wall mar
The friction shoe members 3D are disposed
gins of said opening, spring means below the
vertically in substantially parallel relation to the
bolster supporting said bolster Vin said frame,
bolster end faces to frictionally engage said end
pivotally mounted levers positioned between the
faces, but friction shoe members associated with `
walls of the frame and having friction shoe por
each arm 28 are disposed on the opposite side
tions frictionally engaging the side Walls of the
, ofthe bolster to that of Vits arm. Each shoe
bolster, said levers having arms forming spring
member is carried’by the diagonally extended
seats, and springs in the upper part of the frame
arm 3| which is joined to the corresponding arm
above the bolster compressed between said spring
28 and mounted upon the fulcrum bolt 21. As
seats and the frame for forcing the shoe portions
shown more particularly in Fig. 4, one of the 25 against the bolster.
levers‘consisting of the arm 28 and the arm 3|
3. In a railway car truck, the combination of ai:
is provided with an opening 32 through which
side frame comprising side walls spaced apart
the arm 28 of the other lever extends, so that
and' having a', bolster openingl therethrough, a
the'arms 28 of the levers are disposed on the
bolster disposedA transversely of the .truck and
opposite side of the bolster to the friction shoes
which they carry. lThus in this form of the in
guided for vertical movementby the Wall'mar
vention the upward pressure of the springs on
the’arms 28 swings the shoes into frictional en
gagement with the bolster. In this structure, the
top wall |5 of the bolster opening is omitted to
bolster supporting said bolster in saidV frame,
gins of said opening, spring means below the
a lever pivotally mounted between the walls .
provide operating space forthe arms 3| of the
_of the frame adjacent each side of the bol.-V
ster and having a friction plate frictionally
engaging a verticalV side face of ‘said bolster,
levers.
In‘th'e rstructure shown in' Fig. 5, the levers
arms for said levers providing >spring seats,
and coil springs independent of said bolster
arersi‘milar to those of Fig. l, except that the
spring-'prressed',~ arms 42 of the levers are dis
posed vertically in line with the frictional mem
bers or shoes 2|. These are extended upwardly
intoj the portion of the side frame above the top
wall` |5 of the bolster opening in position to'form
seats for rthe coil springs 33 which are positioned
j supporting spring meansV positioned within the
401 frame above the bolster and compressed’ 'be->`
tweenÁ said spring seats and the frame Vfor yield
ingly forcing said friction plates against the
bolster‘to snub the movement ofthe bolster.1 .
4. In a railway car truck, the combinationvof
a side frame comprising side walls spaced apart
under compression between these seats and a
and having a bolster opening therethrough», a
central transverse web 34 in the side frame.
bolsterV disposed transversely of th'e'truck'and
Thus the springs acting outwardly against the
' guided for vertical movement‘by the wall margins `
armsf42 swing the levers about their fulcrum
of said opening, spring means supporting.' said
bolts 23 and force the shoe members 2| into fric Ci C bolster in said frame, _vertically disposed friction
tional engagement with the bolster walls. If
plates pivotally mounted between the walls of the
desired, the action of thersprings 33 can be sup
frame vadjacent the sides of the bolster, laterali
plemented by additional springs 35. These
horizontally disposed extensions on said plates,”
springs, however, instead of being under com
and vertically disposed coil springs within the
pression', are under tension and are anchored at Ui Ui frame above said bolster and compressed between;
their outer ends by the bolts 36 and with their
said lateral extensions and the frame for forcing
inner ends connected by means ofthe lugs 31
the friction plates into frictional engagement
onÁthe lever arms 42. rl‘hus these springsact
to pull upon the arms 42 of the levers and thus
their effect is cumulative with respect to the
springs 33.
’
‘
Thus self-contained snubbing mechanism is
provided entirely within the confines ofthe side
frames.r The friction shoes bear upon the end
walls of the bolster and thus serve as snubbers
by developing a frictional resistance to the main
springs C and thus dampen the compression and
recoil or rebound of said main springs to mini
mize the vibration imparted to the car body.
`
Iclaim:
`
'
V1. In a railway car truck, the combination of a
side frame having an opening therein, a bolster
disposed transversely of the truck and guided for
vertical movement in said opening, spring means
with the> vertical faces of the bolster to resist*`
the, compression and rebound of said bolster sup- ï
porting spring means. '
5. In a railway car truck, the combination'ofaside frame comprising side walls spaced apart ,
and having a bolster opening therethrough, Va.
bolster .disposed transversely of the truck and
guided for vertical movement by the Wall mar--V
gins, of saidyopening„ spring means supportingv
said bolster in said frame,> vertically disposed
friction plates pivotally mounted >between .the
Walls of the frame adjacent the sides of the
70 bolster, vertical extensions on said plates above
the pivots thereof, and horizontally disposed coil>
springs within the frame above the bolster open
ing and compressed between said extensionsand .i
-, a` seat inr the frame for forcing thefriction plates f
in the frame below the bolster for supporting 75 into frictional engagement with the vertical side
ì
5
2,407,875
faces of .the bolster to resist the compression and
rebound of the bolster supporting spring means.
6. In a railway car truck, the combination of'
a side frame .comprising side walls spaced apart
and having a bolster opening therethrough, a
bolster disposed transversely of the truck and
guided for vertical movement by .the wall mar
gins of said opening, spring means supporting
said bolster in said frame, vertically disposed
friction plates pivotally mounted between the 10
walls of the frame adjacent the sides of the bol
ster, vertical extensions on said plates above the
pivots thereof, horizontally disposed coil springs
6
7. In a railway car truck, the combination of
a side frame comprising side walls spaced apart
andhaving a bolster opening therethrough, a
bolster disposed transversely of the truck and
guided for vertical movement by ythe wall mar~
gins of said opening, spring means supporting
said bolster in said frame, levers positioned be
tween the walls of .the frame above the bolster
opening and pivotally mounted upon a common
fulcrum, ,said levers being disposed horizontally
and extending in opposite directions beyond the
width of the bolster, and each lever having an
arm extending to the opposite side of the bolster,
within the frame above the bolster opening and
a friction shoe plate on each arm adapted to be
compressed between said extensions and a seat 15 swung into frictional engagement with the adja
in the frame, and supplemental coil springs un
cent side wall of the bolster, and coil springs ver
der tension and connected to the extensions and
tically disposed in the frame and compressed be
‘the frame and acting cumulatively with said
tween seats in the frame and the horizontally eX
compressed coil springs for forcing the friction
tended levers for swinging said friction plates
plates into frictional engagement with the bolster 20 against the bolster.
faces to `frictionally resist the compression and
rebound of said bolster supporting spring means.
WILLIAM A. GEIGER.
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