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Патент USA US2132381

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Oct. 11, 1938.
.
D. s. BARROWS "
2,132,381
RAILWAY TRUCK
Filed Aug. 22, 1952
~ ‘
s Sheets-Sheet 1
6:93-2
?yaléz’fggggr?ows
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1 BY
1M
I
I
ATTORNEY
// 1
Oct. 11, 1938‘.
'D. s. BARROWS
2,132,381
RAILWAY TRUCK
Filed Aug. 22, 1932
7
4516/"
5 Sheets-Sheet 2
Oct. 11,1938.
1 2,132,381
D. s. BARRows
RAILWAY TRUCK
Filed Aug. 22, 1932
5 Sheets-Sheet 3
1%“
)3 0‘
2017aINVENTOR
{dawn/vows
BY
I
7/’
r“? ATTORNEY
/
Y
Patented Oct. 11, 1938
2,132,381 '
UNITED STATES PATENT OFFICE
2, 132,38 1
RAILWAY TRUCK
Donald S. Barrows, Rochester, N. Y., assignor to
The Symington-Gould Corporation, Rochester,
N. Y., a corporation of Maryland
Application August 22,1932, Serial No. 629,953
14 Claims.
(01. 105—-197.1)
This application is a continuation, in part, of
my application Serial No. 595,135, ?led February
25, 1932, and entitled “Railway trucks,” which
application has matured into U. S. Patent No.
5 2,069,207 granted February 2, 1937.
This invention relates to railway vehicles and,
more particularly, ‘to trucks and the construc
tion of the side‘ frames, bolsters and associated
parts thereof.
10
'
The principal object of my invention, gener-,
ally considered, is to improve the construction of
railway trucks, and particularly that of side
frames, bolsters and associated parts, whereby‘
'
side ?anges of the other, with the locking shims
formed with outwardly extending ?anges adapted
to embrace or interlock with the guide columns,
and inner faces formed as cylindrical surfaces,
with the ends terminating in radial surfaces and 5
the associated bolster formed with complemen
tary surfaces to thereby accomplish a similar
purpose.
.
Another object of my invention is the provision
of a railwayvehicle truck in which the bolster is 10
interlocked with respect to the side frame by
shims disposed between the sides of the bolster
and the guide columns of the frames, each shim
assembly and detachment of the parts is facili- ‘ having lower ?ange portions supported by means
15 tated.
of the bolster springs, and upward projections
Another object of my invention is the provi
interlocking with the bolster to prevent unde
sion of a railway truck comprising side frames sired displacement of said shims, said projections
supporting bolster springs and an associated desirably having at least one face cylindrical and
bolster, each side frame comprising struts spac
terminating in radial stop surfaces and cooper
20 ing upper and lower members thereof, and inter
ating with corresponding surfaces on the bolster
posed between adjacent coils of said springs.
.or side frame, or both, to provide for lateral
A further object of my invention is the provi
angling therebetween while maintaining a nor
sion of a side frame having bolsterrguide col , mal area of contact.
umns, the guiding faces of which are diagonally
Other objects and advantages of the invention
25 disposed and preferably formed on radial plan? relating to the particular arrangement and conintersecting the vertical axis of the frame.
struction of the various parts will become appar
A still further object of my invention is the ent as the description proceeds. _
provision of a side frame having bolster guide
Referring to the drawings illustrating my in
columns, the inner faces of which are formed vention:-->
30 concave to correspond with the 'contour of a
Figure 1 is a fragmentary side elevational view
cylinder whose axis coincides with the intersec
of one embodiment of my truck.
tion of the longitudinal and transverse vertical
Figure 2 is a fragmentary plan of the embodi
planes of the frame, the ‘sides of said columns ment shown in Figure 1.
being radial with respect to said axis.
Figure 3 is a. plan of one end of the bolster
35
An additional object of my invention is the utilized with the truck shown in Figures 1 and 2.
provision of a railway truck in which the bolster
Figure 4 is a side elevational view of the end
is connected to the side frames by locking shims of the bolster shown in Figure 3.
formed to maintain the same area of contact
Figure. 5 is an end elevation, partly in section,
regardless of bolster angularity, the side surfaces on the line 5—-5 of Figure 3, looking in the direc
40 of the bolster guide columns being, for'that pur
tion of the arrows.
> pose, either formed on radial vertical planes ex
tending from the center of a cylinder, the axis
of which corresponds to the vertical axis of the
frame, the inner surfaces of said guide columns
45 being formed as cylindrical segments, and the
locking shims being formed as curved plates with
radial ?anges at their ends and of substantially
uniform thickness to hold the bolster interlocked
with respect to the frames, while allowing for
50 ready disconnection upon the removal of the
bolster springs and dropping of the shims with
out any necessity for lowering the bolster, or the
bolster guide columns being of conventional form
with their adjacent faces parallel and the side
55 ?anges of each aligned with the corresponding
15
20
25
30
35
Figure 6 is a transverse sectional view of the
bolster on the line .6-6 of Figure 3, looking in
the direction of the arrows.
‘
Figure 7 is a fragmentary longitudinal sec
tional view on the line 1—1 of Figure 3, looking 45
in the direction of the arrows.
Figure 8 is a plan of one of the locking shims
detached from the bolster and frame.
__
Figure 9 is a side elevation of the shim shown
in Figure 8.
.
50
Figure 10 is an end elevation of the shim shown
in Figure 8.
Figure 11 is a vertical sectional View on the line
Il—|l of Figure 8, looking in the direction of the
arrows.
-
55
2,132,881
2
Figure 12 is a fragmentary horizontal sectional
view of a side frame and interlocked bolster
the side frames in a conventional manner, for
example, as shown in the Kadel Patent No.
showing another embodiment of my invention.
Figure 13 is a side'elevational view of the end
of the bolster shown in Figure 12.
,
Figure 14 is a view corresponding to Figure 8,
but showing the modi?ed two-piece lockingv shim
of Figures 12 and 13.
Figure 15 is a side ,elevational view of the shim
10 shown in'Figure 14.
Figure 16 is a vertical sectional view on the
line 16-46 of Figure 15, looking in the direction
_ of the arrows.
Referring to the drawings in detail, like parts
15 being designated by like reference characters,
and ?rst considering the embodiment of my in
vention illustrated in Figures 1 to 11, inclusive,
there is shown a ‘portion of a truck I comprising
a pair of side frames 2, only one of which is frag;
20 mentarily illustrated. Each side frame com
prises a compression member 3, a tension mem
ber 4, and bolster guide columns 5 spacing inter
mediate portions of said compression and ten
sion members and spaced to leave a bolster or
1,630,567, of‘ May 31, 1927, the guide columns
have guiding portions inwardly spaced, as com
pared with the lower portions thereof,-engaged
between lugs on the associated bolster, the planes
of engagement being commonly disposed, as
shown in the patent referred to, parallel to the
longitudinal vertical plane of the side frame.
When, through the omission or ?exibility of the
spring plank, or clearance between said plank
and the frames, one frame tends to lead the
other, the center ,line of the bolster describes
other than a right angle, with the longitudinal
vertical plane of the side frame, forming con 15
tacts between the corresponding corners of the
guide columns and bolster which are theoretically
vertical lines, andas the bolster moves vertically
with reference to the columns under external im
pulses, causing movements of the supporting 20
springs, the bolster will speedily wear the con
tacting corners of the columns until, through
wear, suf?cient bearing area has been developed,
so that any further wear will beat a progres
sively slower rate. In this process of develop 25
window opening 6 therebetween. The compres
'
ing
additional wearing surface, the preferred ?t
sion member preferably comprises a web l2 and
depending ?anges Q14, and the outer ends thereof clearances between bolster and columns are lost
slope downwardly beyond the bolster opening to and the actual clearances become too great for
unite with the corresponding ends of the tension correct alignment of the parts.
In order to change this undesirable condition, 30
30 member and integral journal boxes, if used, said I form the ?anges 29 at the bolster guiding por
journal boxes not being illustrated.
'
The tension member 4 has an intermediate tions of the guide columns 5 with guiding sur
faces 31 on planes radial, or substantially radial,
normally horizontal portion 15 generally box
shaped in section, the upper Web portion 9 of ‘from the vertical axis 32 of the frame or the 35
intersection ‘between the central longitudinal
35 which is extended laterally beyond the depend
ing ?anges or normallyvertical web portions ll plane of the frame and the central transverse
thereof to provide a spring seating portion of plane thereof. The bolster could have ?anges or
lugs with surfaces formed on corresponding ra
adequate area. The‘ spring seating portions be
dial planes for engagement with the guiding
. yond. the ?anges II are desirably reinforced by
surfaces 3| on the columns, the included angle 40
40 triangular gussets IS. The lower web portion I'I
between
said surfaces being greater than the
beneath the bolster opening 6 desirably termi
included angle of the radial column sides by an
nates between the guide columns 5, or approxi
mately therebeneath, leaving the outer portions: amount equal to the angle which the bolster is
permitted to swing from one extreme to the
of the tension member substantially inverted U
other, upon departure from ‘the normal right
shape
in
section,
as
will
be
understood.
45
The upper web 9 of the tension member is, in angle relationship with respect to the frame.
the present embodiment, formed with upper Because of this radial relationship, movement of
umns at a point, as designated by the reference
the bolster to an extreme allowable angular po
sition would‘ still result in contact on. generally
?at surfaces, substantial in extent, rather than '
the line contact previously referred to. In the
character l9, and extends diagonally upward and
outward through the corresponding column to
this improvement further, as will now be ex
longitudinal convolutions _or corrugations l8, only
one of which is illustrated in Figure 1, each of
which preferably starts between the guide col
?nally merge with the normal plane of the web 9,
thereby strengthening the angle between the hor
'55
izontal and inclined portions of the tension mem
ber, as well as providing supplemental or inter
present embodiment, however, I have continued
plained.
_
"
'
'
Instead of forming the webs 28 of the guide
columns 5 on parallel planes, I have formed the
inner faces concave to the contour of a vertically
mediate support for those portions of the tension disposed cylinder whose vertical axis conincides
member between the guide columns and at the ‘with the intersection of the longitudinal and
transverse vertical central planes of the side 60
60 same time providing for the interlocking between frame. The bolster could be correspondingly
the frame and spring plank, if used.
Each guide column 5 desirably comprises a web formed with convex cylindrical portions inter
, portion 28 which extends substantially vertically locking withthe concave cylindrical portions of
from the compression to the tension member. the guide columns, and be otherwise, than as
sides of each guide column 5 are de?ned by heretofore described, of conventional construc 65
65 The
?ange portions 29 extending from the side edges tion“ I have, however, carried my improvement
still a. step further to facilitate assembly and
ofJthe web 28 and with their free edges pref
erably reinforced by beading 30. Said ?anges provide for quick detachability of the parts upon
are desirably spaced a greater distance than the removal of vthe bolster springs.
In order to accomplish the foregoing results, I 70
width of the convolutions l8 in-the tension mem
provide
a shim 33 between the guide columns 5
ber so that they straddle said convolutions and
and the bolster therebetween on each side of said
connect with the main web portion 9 of the ten
sion member on either side of the convoluted bolster. Each shim 33, for convenience and
economy, preferably has its parts of approxi
portion l8 thereof.
'
In a truck in which the bolster is connected to mately uniform thickness, and comprises a cy 75
75
2,182,881
lindrical web portion 34. the outer surface of
which is convex-to nest with the concave cylin
drical surface of the corresponding guide column,
,
shown in Figs. 1 and 2. The upper ends of the
helical springs 40 are desirably encircled by more
than 180° by depending‘ ?ange portions 41 on
the shims 33 and depending complementary
?ange portions 48 on the bolster 36, thereby‘posi
and the inner surface of which is concave, about
a correspondingly shorter radius, to receive and
interlock with a corresponding convex‘ projec
tion 35 on the bolster or load-carrying member
The outer ends of the web portion 34 of
lower web.49 of the bolster is desirably formed
with a downwardly opening pocket 50, desirably
' each shim have ?anged portions 31 formed radial
of a size corresponding approximately with the
36.
p
tively preventing undesired displacement. The
_
10 to correspond‘ with the radial bearing surfaces
3| on the guiding portions of the columns 5 and
frame pocket de?ned by the rib 45; receiving 10
the upper portion of the elliptic spring band to
hold said spring in proper position.
Referring now tothe embodiment of my in
vention illustrated in Figures 12 to 16, inclu
sive, there is shown an alternate arrangement in 15
with guiding lugs 38 on the bolster, which have
corresponding radial surfaces extending from
the ends of the cylindrical portions 35. In this
15 way, the shims 33 areinterlocked with the guide
columns at their outer surfaces and with- the
bolster at their inner surfaces so that they serve
which the bolster 369' is interlocked with respect
to the side frame 28 by shim means 33*‘, each
of which is made in two pieces, a bearing piece
5| anad a. base or partial spring cap piece 52.
The bearing piece 5| is formed with a cylindri 20
cal portion 34‘1 and radial ?anges 35*‘, as in the
preceding embodiment. The base or partial
spring cap piece 52 is formed with depending
?anges or beading 4'!a adapted to cooperate with
the bolster ?anges 48a in centering the associated 25
to interlock the bolster 36 with respect to the
side frames, sufficient clearance, however, being
20 provided, as shown most clearly in Figure 2, to
permit a limited amount\of horizontal angling
between the bolster and each frame, while at
the same time avoiding any line engagement at
the limit of the angling movement, as was the
25 custom when using a conventional bolster and
_ frame'interlock, as shown in the Kadel Patent
helical springs 4|)a and upstanding lugs 42a adapt
ed to ?t in corresponding apertures 43a to in
terlock the shims with respect to the bolster 368.
In order to detachably connect the parts 5|
and 52 of the shim 33*‘, the bearing piece 5|, 30
No. 1,630,567, previously referred to.
In order to hold the shims 33 in place,rwhile at
30
3
the same time providing for their convenient ap—'
plication and removal, each'shim is formed with
a lower ?ange portion 39 which overlies portions
of the bolster springs 40, and an associated spring
plate 4|, if used, whereby, when the parts are
which may be optionally a casting or a drop forg
ing adapted for economical replacement, if neces
sary from wear, is formed with an aperture 53
assembled, said ?anges 39 serve as bases for hold
adapted to receive an interlocking‘ lug 54 on an .
35 ing the cylindrical and radial locking portions of
upstanding portion 55 on the base member 52.
Said base member desirably has its ?ange por
,'tion 39a extended beneath the cylindrical por
tion 34a of the bearing piece 5| to support the
each shim in place. The bottom ?anges of the
shims ' are further equipped with upward pro
jections 42 ?tting into corresponding pockets 43
in the underside of the bolster end to serve as
40 reaction points to resist any possible horizontal
component from an eccentric application of spring
same. in proper position.
In order to provide for the reception of the 40
upstanding portion 55 on the base member 52,
the bolster is desirably formed with a pocket 56
load to the shim planes which might-tend to
cause rotation of the entire shim around a hori- I .on either side and formed of a contour adapted
zontal axis parallel with the bolster axis, and
45 thereby cause the bottom'edge of the shim to
draw away from the bolster. These auxiliary
locking means 42 may be either in the form of
the upwardly projecting spuds illustrated, or of
any desired cross-section, or they may be in the
50 form of splines or tenons ?tting in grooves in the
bottom surfaces of the bolster ends.
-
In the present embodiment, I have shown the
bolster supported at each end, one end only be
ing illustrated, by means of four helical springs
55
40 and an elliptic
spring or set 44 without the
.
- _- use of any spring plank, the springs 40 and 44
resting directly on the upper web 9 of the ten
sion ‘member beneath the bolster opening 6, with
or without a spring plate (not shown). ‘Inas
60 much as the form of helical elliptic group of the
present embodiment necessitates placing the heli
cal springs so that they extend beyond the usual
plan contour of a conventional bolster, with.
which the bolster illustrated approximately cor
65 responds, the ?anges 39 of the shims serve not
only. as bases therefor, but also as partial spring
capsvfor the helical springs 40. The springs are
desirably interlocked with the frame, as illus
trated, the helical springs 4|] by encircling up
70 wardly extending lugs 45, desirably circular in
plan, and the ellipticspring. 44 by having the
lower portion of its band 46 received in a corre
sponding pocket in the upper web 9 of the frame,
vwhich pocket may be de?ned by an upstanding,
75 substantially rectangular rib or flange 46', as
-
to snugly receive the upstanding portion 55,
which, in the present embodiment, is shown
generally T-shape for rigidity. Except for the 45
fact that the locking shims 33a are formed in
two pieces and the bolster is pocketed at the
sides to receive the upstanding portion 55 con—
necting the bearing shim and base portions 5|
and 52, the present embodiment may correspond 50'
with that of the preceding embodiment.
From the foregoing disclosure, taken incon
nection with the accompanying drawings, it will
be seen that I have devised a truck involving a
side frame adapted to be connected to and dis
connected from an associated bolster, with look
65
ing shims disposed between the sides of the bolster
‘and the guide columns, and of such a character
that a limited amount of horizontal angling. be
tween the bolster and side frames is permitted,
with the maintenance of ‘contacting areas regard
less of bolster angularity. Inasmuch as the bol
ster does not have to be dropped for disconnection‘
from the frame, the guide columns do not have 65
to be substantially o?fset away from each other
at their lower portions to permit the‘ passage of
bolster locking lugs, although I have shown'one
form of my invention embodied with a frame in
which the lower portions of the guide columns are
so offset. It will, therefore, be seen that the lower
portions of the guide columns in the ?rst form
of my invention are spaced :1 distance approxi
mately corresponding with the upper or guiding
portions thereof and extend between adjacent
2,132,381
4
a bolster with its ends received between said
guide columns, said columns each comprising a
helical springs lll, that is, the spring supporting
portion of the tension member is extended so
transverse web and side ?anges, said ?anges ad
jacent- the bolster ends having outer surfaces
formed on planes ‘substantially radial from the
vertical axis of the corresponding frame, and a
locking shim disposed between each side of the
bolster and the adjacent guide column, each shim
having an outer surface cylindrically curved
that it is partially separated by the guide col
umns which will, therefore, lie between portions
of the helical springs on opposite sides of the.
longitudinal central plane of the frame.
As will be understood, the assembly of the bol
ster and side frame may involve merely the inser
tion of the bolster ends into the bolster openings
10 6 of the frames when the associated members are
in approximately normal relative elevation with,
respect to one another. The locking shims 33 and
about the vertical axis of the frame, and the en
33“, depending on whether a bolster 36 or 36“
is employed,are then placed by moving the same
15 upwardly between the sides of the bolster and
the guiding portions of the columns until they
an inner surface concentric with its outer surface
and the engaging surface of the bolster being
assume the position illustrated in Figure 1, or
Figure 12, as the case may be.
‘
10
gaging surface of the associated guide column
being correspondingly curved, each shim having
.
After the shims are in place with any form of
20 my invention, the springs may be inserted be
neath the bolster and shims, it being merely nec
essary to move the bolster or frame vertically,
one with respect to the other, so that the bead
ing or spring centering ?anges 41 and 48 on the
15
correspondingly curved.
6. A railway truck comprising a pair of side
frames, said frames involving guide columns
spaced to leave a bolster opening therebetween,
a bolster with its ends received between said guide
columns, said columns each comprising a trans 20
verse web and side ?anges, said ?anges adjacent
the bolster ends having outer surfaces formed
on planes substantially radial from the vertical
axis of the corresponding frame, and locking
- shim means disposed between each side of the 25
25 locking shims and bolster, if used, and the pocket bolster and the adjacent guide column, each shim
50 in the bolster, if employed, properly receive
means comprising a bearing piece having an outer
the corresponding portions of the helical and el
liptic springs.
Although preferred'émbodiments of my inven
30 tion have been illustrated, it will be understood
that modi?cations may be made within the spirit
and scope of the appended claims and that I
may use the various features of my invention dis;
closed either separately or in combination, as
35 desired.
I claim:
1. A side frame comprising a compression
member, a tension member, bolster guide columns
spacing intermediate portions of said members
40 and spaced to leave a bolster opening therebe
tween, said guide columns comprising transverse
webs and side ?anges, a bolster received in said
opening, and a locking shim disposed between
each side of the bolster and the adjacent guide
45
surface cylindrically curved about the vertical
axis of the frame, and the engaging surface of
the associated guide column being corresponding 30
ly curved, each bearing ‘piece having an inner
surface concentric with its outer surface and the
engaging surface of the bolster being correspond
ingly curved, and a base for each bearing piece
comprising a lower portion adapted to be sup
ported by means of associated bolster springs and
a lug portion normally interlocking said bearing
piece and bolster.
-’
r
'7. A side frame comprising a compression mem
ber, a tension member, bolster guide columns 40
spacing intermediate portions of said members
and spaced to leave a bolster opening therebe
tween, that portion of the tension member be
neath said guidecolumns being adapted for the
support of a nest of helical and banded leaf 45
column, each shim having a surface cylindricagy springs and provided with integral formations
curved about the vertical axis of the frame, a d
the engaging surface of the adjacent member
being correspondingly curved for allowing relative
horizontal angling while maintaining the same
50 area of contact regardless of bolster angularity.
2. A railway truck comprising a side frame
having a compression member, a tension mem
ber, bolster guide columns spacing-intermediate
presenting horizontally curved surfaces for di
rect positioning engagement with the helical
‘springs and other formations presenting hori
zontally straight surfaces for direct positioning
engagement with a band of said leaf springs.
8. A railway truck comprising a side frame hav
ing a compression member, a tension member,
portions of said members and spaced to leave
bolster guide columns spacing intermediate por
and the adjacent guide column for allowingrela
tive horizontal angling while maintaining the
springs supporting said bolster from said tension.
member, and spring plate means associated with
said bolster and guide columns, said plate means
and ‘bolster being v'supported by said nest of
tions of said members and spaced to leave a
a bolster opening therebetween, a bolster re
‘ceived in said opening and a locking cylindrical bolster opening therebetween, a bolster received
in said opening, a nest of helical and elliptic
"shim disposed between each side of the bolster ~
60 same area of contact regardless of bolster angu
larity.
.
k
3. A shim adapted to lock is. bolster to an as
sociated side frame and comprising a cylindri
cal web portion and radial ?anges at the sides
65 thereof.
4. A-shim adapted to look a bolster with respect
to an associated side. frame comprising an up.
standing cylindrical bearing portion, adapted to
lie between a side of a bolster and a guide column
70 of said frame, and a base portion adapted to in
terlock with an associated bolster and to overlie
associated bolster spring means.
5. A railway truck comprising, a pair of side
frames, said frames involving guide columns
75 spaced to leave a bolster opening therebetween,
springs-and cooperating to provide depending
curved rib means on spring engaging surfaces
coplanar with the normal lower surface of the
supported end of the bolster, encircling each
helical spring for more than 180°, and a down
wardly opening pocket receiving the.upper band of
said ellipticspring.
.
9. Spring cap means for a truck unit compris
ing helical and elliptic springs, said means engag
ing the load surfaces of said springs and provid
ing spring-positioning portions lying on all four
sides of the spring band of said elliptic spring
and depending from spring engaging surfaces
coplanar with the normal lower'surface of the
70
5
2,132,881
supported end of the bolster and encircling each
helical spring for more than 180°.‘
10. A shim adapted to look a bolster with respect to an associated side frame and comprising
13. A side frame comprising a compression
member, a tension member, bolster guide columns
spacing intermediate portions of said members
and spaced to leave a bolster opening therebe- ,
a vertical cylindrical web portion, radial ?anges tween, said guide columns having concave sur
on the sides of said web portion, and a horizontal faces coaxial with the vertical axis of said side
base; said base having upstanding means spaced' frame, and outwardly facing surfaces coradial
from said web and adapted to engage said bolster - with said vertical axis, that portion of the tension
to prevent relative movement therebetween.
member between said guide. columns being
10
11. In a railway truck comprising a side frame adapted for the support of a nest of helical and 10
having spaced guide columns de?ning a bolster handed leaf springs and provided with integral
opening, a bolster received in said opening, and a formations presenting horizontally curved sur
locking shim associated with each side of the faces for positioning engagement with the helical
bolster and the adjacent guide column for allow
springs and other formations presenting hori
15 ing relative horizontal angling of the bolster with zontally straight surfaces for positioning engage
respect to the side frame while maintaining the ' ment with a band of said leaf springs.
same area of contact regardless of bolster ‘angu
larity, said shim being formed in two separate
parts, one part of which comprises a bearing piece
20 having a cylindrical portion and ?anges substan
tially radial with respect to the axis of said
cylindrical portion and the other part of which
comprises a base having an upstanding portion
interlocking with said bearing piece and bolster.‘
12. A bolster formed with gui. ling lugs on each
side and adjacent an end thereof, said lugs
having wearing surfaces, the planes of which are
substantially radial with the vertical axis of an
associated side frame, surfaces on said bolster
30 intermediate said wearing surfaces being convex
and substantially cylindrical about said vertical
axis, and pockets in said bolster sides intermedi
ate said lugs for the reception of means to inter
lock said bolster with associated shims.
25
14. In a car truck, in combination, a side frame
having a window opening de?ned by spaced guide
columns, a bolster end extending into said open
ing, shims interposed between said columns and 20
bolster, each of said shims having a cylindrical
web portion and radial ?anges at the sides there
of ‘adapted to engage-complementary parts'of the
columns and bolster to permit'a horizontal angling
movement of the bolster with respect to the side
frame, said shim also having a base extending in
wardly of the bolster, said shim base and bolster
having depending curved rib means adapted to
encircle associated helical springs forvmore than
180 degrees.
'
'
DONALD S. BARROWS.
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