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Патент USA US2132384

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Oct. 11, 1938;.
Q I
D. s. BARROWS
2,132,384
RAILWAY TRUCK
Original 'F‘iled Aug. 22, 1952
2 Sheets-Sheet 1
‘ Oct. 11, 1938.
D, $_ BARROWS
2,132,384
RAILWAY TRUCK
Original Filed Aug. 22, 1952
2 Sheets-Sheet 2
zé
59
406
I J?arraws
Patented Oct. 11, 1938
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I
'
_
2,132,384
UNITED STATES PATENT OFFICE
2,132,384
RAILWAY TRUCK
' Donald s. Barrows, Rochester, N. Y., assignor to
The Symington-Gould Corporation, Rochester,
. N. _Y., a corporation of Maryland
Original application August 22, 1932, Serial No.
629,953. Divided and this application Decem
ber 2, 1937, Serial No. 177,761
20 Claims. (Cl. 105—197.1)
This is a divisional application of my copending application Serial No.
629,953,
filed
August 22, 1932, and entitled Railway trucks.
This invention relates to railway vehicles and
5 more particularly to trucks and the construction of the associated parts thereof. '
Figure 2 and looking in the direction of the
arrows.
.
Figure 5 is a side elevational view of one of
the locking shims or adapter castings, removed ‘
from the associated truck parts.
5
'
Referring now to the drawings in detail, where
The principal object of the invention, considered generally, is to improve the construction
in like parts are designated by like reference
characters, there is shown a portion of a railway
of railway trucks, and particularly the ii‘sseci-
vehicle truck 8'’ comprising a pair of side frames
10 ated parts thereof, 80 as to provide a desired 01'
21’, only one of which is fragmentarily illustrated. l0
predetermined degree of ?exibility therein.
Each Side frame comprises a compression mem
TA feature of the invention is the provision of a
railway truck in which the bolster 1s interlocked
ber 3b’ a tension member 4b, and bolster guide
columns 5b Spacing intermediate ‘portions of the
Wlth an adapter casting 01' sfhlm at each end
15 thereof and the adapter .castmg or shlfm 15’ in
ggggtégtsilégc?gingmh gulde columns 0 an as‘
'
'
-
-
compression and tension members to leave a
bolster or window opening 6“ therebetween; The “5
compression member preferably comprises a web
‘I
i h
,
‘
cent the
id
e
the
f,
_A further feature of the invention is to pro- pe‘iV1gif3_gg:-°;1gae??a_t0 forms are; ciag‘gelsted ginge
. vide
mxtapositioned
surfaces
on
a bolster
end
20 and associated adapter casting so as to permit a
horizontal angling movement of the bolster with
respect to the adapter casting and an associated
side frame and still provide adequate bearing
areas between said elements_
25
A still further feature of the invention is to
.
spring plank ‘being so associated or interlocked
,-
1
_
The compresslon member has 20
8 Outer ends thereof’ beyfmd Phe gmde columns’
Sloped downwar $113’ to umte Wm} corresponding
ends of th? tenslon membe?,and_mtegra1)°uma1
bores or Journal box rece1v1ng Jaws, neither of
whlch are Illustrated"
provide, in a railway truck, spaced side frames
‘and a connecting spring plank, the ends of the
“
i?aped Sectmn'
-
b
The ltenlsllori mzmber
mm” .y
_
_
25
ha? an mtermedlate
on?“ M pqr Ion
’ gbenerany box
shaped m sectmn' the upper Web_9 of Whlch e'X'
with. the side frame as to provide for relative hori-' tends’ laterally beyond dePendmg ?anges or
3“ zontal angling between each side frame and the
corresponding end of the spring plank.
The above object and features of the invention,
as well as numerous other objects and features,
normally Vertical Web portions l0 thereof to 30
provide a spring-seating or supporting portion
,
_
_
.
of aqequate or Smtable area‘ The spnrig'seatmg
Portlons beyond the ?anges “J are deslr’ably re‘
'
W ill be 00 m e apparen t as th e -d escr i ptmn
pro —
inforced by triangular gussets III. The lower or '
free ends of the web portions I0, beneath the 35 .
ceeds '
bolster opening 61’
.
»
'
.
.
Referring now to the accompanying drawings,
which are illustrative of the invention:
Figure 1 is a fragmentary side elevational view
tion, a portion of the view being illustrated in
'
4 a Figure 1 and looking m the dlrection of the
'
'
_
'
_
Flgul‘e 5 15 a horlzonta! Sectlonal View’ taken
along the lines 3.—3 0f Flgure 1, looking in the
direction of the arrows and showing a portion
50 of the lower spring plate and spring .plank re-.
moved to more Clearly illustrate One Of the
features.
.
-
-
_
.
olghlssuggz‘g
.
'
??bélggvlezrted u shape In Sectmn outwardly of
.
The uppér web 9,, of the tension member is 40
formed with upper longitudinallyextending con
Figure 2 is a fragmentary horizontal sectional
View of a truck’ taken along the lines 2-": of
arrows.
are desirably connected and
’
tigllgfogzgegé ngeaigis?gna‘
40 of a truck showing an embodiment of the invensectmn'
.
-
_.
.Figure 4 is a‘ vertical _ longitudinal sectional
view of the bolster, removed from the associated
55 truck structure, taken alb‘hg the lines 4-4 of
volutions or corrugations l8" one of which is
shown in section in Figure 1. ' Each of the con
volutions preferably starts between the guide 45
columns at a position adjacent the vertical center
line of the side frame and is designated by the
numeral [3. The convolutions extend upwardly
from the web 9b and outwardly 'of the window
opening, through the corresponding guide 50
columns, to ?nally merge with the normal plane
of the web .91’ outwardly of the window. opening,
thereby forming a gusset and reinforcing the
angle between the horizontal and inclined por
tions of the tension member as well as providing 55’
2
2,132,384
a substantial support for the portion of the ten
carrying member or bolster 36” which has an
sion member intermediate the guide columns.
end portion l'l thereof partially occupying the
Each guide column 5” comprises a web portion
M which extends substantially vertical from the
compression member to the tension member.
The sides of each web portion have outwardly ex
tending ?ange portions l5 which have their free
edges reinforced by means of a beading I6. The
?anges l5 are spaced laterally of the web por
upper area of the window opening 61’. Inter
posed between each guide column 5b and the ad
jacent side of the bolster end is a locking shim
or adapter casting 33b. The construction of the
associated guide columns, shims and bolster is
10 tions l4 a sufficient distance so as to straddle or
overlie the convolutions lab in the tension mem
ber and connect with the web 9b of the tension
-member on either side of the convoluted portions.
In the instant embodiment of the invention
15 there is illustrated a frame 2'’ constructed as de
scribed and claimed in my prior Patent 1,652,808,
dated December 13, 1927, and it will be under
stood that it is not the present intention to limit
the invention to this particular showing.
The side frames 21’ are connected together ad
20
J'acent their lower portions by means of a spring
plank 51, each end of which is desirably corru-l
gated or convoluted upwardly, as indicated at
58, to correspond substantially with the longi
25 tudinal convolutions or corrugations l8b of the
tension member 4b. When the spring plank is
positioned in association with the side frame it
will rest or bear on the web 9” of the tension
member and nest over the convolutions l8”,
30 thereby providing a satisfactory interlock be
tween each end of the spring plank and the asso—.
ciated side frame.
The interlock between the spring plank and
side frame is an improvement over the usual
35 squaring lugs which, as is well known, are rela
tively closely spaced and involve aperturing of
the spring plank to provide for an interlock;
the aperturing of the spring plank results in
weakening of the plank and a possible breaking
40 or fracture thereof when subjected to the stresses
transmitted thereto during service. The im
provement just described. not only avoids a
strength reduction in the spring plank, which
would be caused by the receiving apertures, but
45 also places the point of ultimate resistance to
undue track angularity at a maximum distancev
from the center of relative horizontal rotation,
as most Clearly illustrated in Figure 3.
In order to provide for a limited amount of
relative horizontal angling or rotation of the
spring plank with respect to the side frames, the
upstanding side walls 59 of the convolutions l8b
such as to permit a horizontal angling movement
of the bolster relative to the side frame so as to
incorporate, in the truck structure, a desired 10
degree of ?exibility.
It will be appreciated that through the omis
sion of the spring plankin a truck structure or,
as in the present instance, through the ?exibility
of the spring plank one side frame will tend to 15
lead the other side frame of the truck, which
will cause the bolster to assume other than a
right angle relation with the side frames. This
angular movement, if not provided for, will result
in line contacts between corresponding corners 20
of the guiding surfaces of the columns, shims and
bolster. As the bolster moves vertically, in such
a structure, with reference to the side frames as
a result of external impulses, causing movement
of the supporting springs, the above-recited cor
25
ners will wear progressively and speedily until
sufficient bearing or contacting areas have been
developed. In this undesirable process of devel~
oping wearing surfaces the preferred or predeter
mined clearance between the guide columns, 30
shims and bolster has vanished, and the‘actual
clearance has become more than that required
for the proper alignment of the associated parts.
In order to change or prevent this undesirable
condition, the contacting surfacesof the guide 35
columns, shims and bolster have been so con
structed and arranged as to permit a limited or
predetermined amount of horizontal angling
movement of the bolster with respect to the side
frame and at the same time provide engaging
surfaces of adequate area to arrest or limit the
said angling movement.
In order to accomplish this, each guide column
is provided with an inwardly facing web surface
20, preferably disposed in parallel relation with
the transverse axis of the truck structure, and
the column ?anges have outwardly facing sur
faces 2| perpendicularly or angularly disposed to
the web surfaces 20.
Each locking shim or
adapter casting 33b comprises an upstanding web 50
34b the outer portion of which is formed with a
relatively ?at or straight surface 22 coplanar with
desirably extend radially, or approximately so, . and adapted to engage the column web surface
20 upon any longitudinal movement of'the shims
from the vertical axis of the frame 21’ or the
with respect to the guide columns. The lateral
55 vertical line of intersection between the, longi
tudinal and transverse vertical planes of the side end of the shim web portion 34b of each shim
frame. The walls 50 of the corrugated portions desirably terminates in ?anges 311’ which par
58 of the spring plank are also desirably formed tially overlie the column ?anges IS. The shim
radial similarly to the walls 59, with the included ?anges 31” have spaced, inwardly facing, sur
angle between the adjacent surfaces on the walls faces 23 which are parallel with and are, adapted 60
59 and ?ll corresponding substantially with the to engage the column ?ange surfaces ‘2| upon
angle of permissive deviation from normal rela ‘ any relative transverse movement of the shim
tionship between the spring plank and side frame. with respect to the side frame. ‘The inner por
tion of the shim web 34*’ is provided with an
It will, therefore, be observed that means for a
limited or predetermined amount of horizontal arcuate surface 66 which is concave or cylin 65
angling has been provided between the side frame drical about the axis corresponding with the ver
tical axis of the side frame. It may be said that
and spring plank while at the same time ensur
ing that, at the extreme limits of such angling, the surface 66 is coaxial with the vertical axis
there will be a large area of contact provided for
of the side frame. The shim ?anges 31” are pro
restraining any further angling; the e?iciency of . vided with outwardly facing surfaces 65 which 70
such restraining contact areas will be at a maxi
form, in effect, continuations of the concave sur
mum, as the greatest width of each area is posi
face 66 and are coradial with the vertical axis
tioned a maximum distance from the axis of
of the side frame, as most clearly illustrated in
relative angling,
75
Extending between the side frames is a load
‘Figure 2.
The bolster end i1 is‘ desirably notched or re
75
3
2,132,884
cessed at each side thereof, as indicated at 61,
to accommodate the associated or adjacent web
of the shims 33b. The sides of the bolster end
are correspondingly formed with cylindrical arcu
ate surfaces 68 convexly curved about an axis
corresponding to the vertical axis of the side
frame and with the axis of the cylindrical shim
surfaces. The convex bolster surface '68 is de
?ned by diverging surfaces 69 which are posi
10 tioned adjacent the shim ?ange surfaces 65 and
preferably coradial with the vertical axis of the
side frame. The included angle between the
vthe shims with the bolster, the lugs 42'’, of course,
fitting in the aperture 431' with sufficient clearance
to allow for the permissible angling movement be
tween the bolster and shims. As previously
stated, the bolster end has its lower web ‘III offset
upwardly or recessed, as at ‘I I, to receive the base
or ?ange 3910 of the shims and ensure that the
lower surfaces of the bases or ?anges, when in
position, will be in substantially the same hori
zontal plane as the lower or top spring plate en 10
gaging surface of the lower web '10. The inner
edge ‘I2 of each shim base 39b desirably has its
radial shim surfaces 65 and the radial bolster sur- ‘ lateral end portions straight or substantially par
allel to the transverse axis of the truck structure,
faces 69 corresponds substantially with the per
missible or predetermined relative angular move; as indicated at ‘I4, while the intermediate portion 15
ment of the bolster, horizontally- from its normal thereof is concavely curved and coaxial with the _
vertical axis of the side frame, as indicated at ‘I3.
position, .with respect to the sideframe. An a1
lowance, of course, is made in'the included angle ' Each of the inner de?ning surfaces of the bolster
referred to‘ above for a slight horizontal angling recess ‘II or shoulder portions ‘I5, provided on the
movement between the shims and associated guide lower web ‘III, is correspondingly formed with a 20
columns although, as will be clearly understood, convexly curved portion 24 positioned adjacent
I it is preferred that the bolster horizontal angling and coaxial with the concave surface ‘I3 ofwthe"
movement take place between the bolster and shim base, while the portions 25 are continued at
shims on account of the juxtapositioned surfaces the free ends of the convex portion‘ as substan- '
therebetween being especially provided for that tially straight surfaces which are spaced from the
base edges 14 a suitable distance to permit the
purpose. The shims may, therefore, closely en
gage the guide columns with only the necessary horizontal angling movement of the bolster with
,
‘
clearance therebetween to allow a free vertical .' respect to the shims.
From the foregoing description, considered with
movement of the shims with respect to the col
the accompanying drawings, it will be observed 30
30 umns. From the preceding it will be noted that
they bolster is free to angle or rotate horizontally that there has been devised, a truck involving a with respect to the side frames and that adequate side frame adapted to be connected to and dis
bearing areas have been provided to limit the connected from an associatedv bolster with lock
ing shims disposed between the sides of the bolster
said movement.
and the guide columns and ofsuch construction
The bolster has each end thereof desirably sup
ported by means of four helical springs 40'’ and that a limited amount of horizontal angling be
an elliptic spring or set 44b which are, in turn, tween the bolster and side frame is permitted with
the maintenance of contacting areas regardless
supported by the spring plank and tension mem
ber and which may hereinafter be termed as a of bolster angularity. It will be further observed
spring group. Interposed between each spring that, in the truck structure which has a prede 40
group and the underlying spring plank is a lower termined‘ as well as permissible degree of ?exibil
spring plate 6| desirably formed with upwardly
ity incorporated therein, the spring plank forms
extending centering collars 62 for the helical
springs 40b and an approximately rectangular
a connection between the bottom portion of the
spaced side frames and is so ‘constructed as to
interlock with the side frames as well as permit 45
a relative horizontal angling movement of the
elliptic spring centering aperture 63 for receiving
or accommodating the lower elliptic spring band
4'6‘). Centering plugs or spuds 63b extend down
wardly from the spring plate and are positioned in
accommodating pockets or apertures formed in
the spring plank. Convoluted portions 6|a are
formed in the spring plate so as to straddle or nest
over the correspondingly formed portions of the
spring plank. An upper spring plate 64, inter
posed between the bolster and spring gr up for
' retaining the spring group in assembled r lation,
is preferably similar to the bottom spring plate 6 I.
The upper spring plate is likewise provided with
spring plank with respect to the side frames and
with suitable engaging areas therebetween to
limit the said angling movement.
'
Although a preferred embodiment of the in
vention has been illustrated and described, it
will be understood that various alterations and
modi?cations may be made thereto without de
parting from within the spirit and scope of the
appended claims.
'
i
55
I I claim:
1. In a flexible railway truck, in combination, a
pair of side frames having a bolster opening de- ,
fined by guide columns, a bolster having an end
plugs 64b which are adapted to extend into cor
responding pockets or apertures in the lower web
‘Illof the bolster end.
In order to hold the shims 33b in place while at
the same time providing for their convenient ap
portion extending into said opening and adapted 60
to angle horizontally with respect to said frames,
shims interposed between said bolster'and guide
plication and removal, each shim is preferably
columns, a spring plank connecting said side
formed with a base or lower flange 39b which frames adjacent the lower portions thereof, said
65 underlies a portion‘ of the bolster and extends in—
shims adapted to lock the bolster to the side 65
to a recess or relief'II formed in the under part‘ frame and comprising a base and a web portion
of the bolster. The ?ange overlies a portion of
the bolster springs 40‘? positioned on the corre
sponding side of the transverse axis ‘of the side
frame and the associated portion of the upper
spring plate 64. In the assembled structure the
base or flange 39b of each shim is desirably
formed with transversely spaced upstanding pro
jections 42b ?tting loosely in the .pockets 43b in
75 the bolster lower web ‘III to serve for interlocking
upstanding therefrom, oneside of said Web‘ por
tion being cylindrically concave and terminating
in surfaces radial with respect to the axis of the
concave surface, the other side of said web being 70
provided with straight faces forming a notch for
interlocking with respect to the guide columns,
and said spring plank being provided with end
portions corrugated and interlocked with corre
sponding corrugations on said frame, said corru— 75
2,182,384
4
gations involving surfaces approximately radial
with the vertical axis of the side frame and nor»
mally spaced to correspond with a permissible
horizontal angling therebetween, whereby a de?
nite interlock is provided between the plank and
frames with the provision of adequate restraining
areas for limiting said angling movement.
2. A railway truck comprising a pair of side
frames, each of said frames involving guide col
10 umns spaced to leave a bolster opening therebe
tween, a bolster with its ends received between
said guide columns, said columns each compris
ing a transverse web and side ?anges, said side
?anges adjacent the bolster ends having outer
15 surfaces formed on planes substantially par
allel to the- longitudinal vertical plane of
said frame, and a locking shim disposed 'be
tween each side of the bolster and the adja
cent guide column, each shim having an outer
20 surface substantially parallel to the adjacent
therebetween and adequate restraining areas
for limiting such angling.
'7. In a railway truck, in combination, a pair of
side frames, each comprising a compression mem
ber, a tension member, bolster guide columns
spacing intermediate portions of said members '
and spaced to leave a bolster opening therebe
tween, a bolster received in said opening, a spring
plank having an end portion thereof positioned
in said opening below said bolster and resting on 10
said tension member, said tension member being
formed with upwardly extending spaced corru
gations, spaced corrugations in said spring plank
in straddling relation with said tension member
corrugations, said corrugations having upright 15
faces adapted to engage and disposed substan
tially radial with respect to the vertical axis of
the frame, the included angle between said faces
being substantially equal to the permissible hori
zontal angling movement of the spring plank with 20
respect to the side frame.
8. In a railway truck, in combination, a side
frame having a spring plank supported thereby,
shim thereto and an inner surface cylindrically ‘spaced corrugations on said frame, spaced cor
curved about the vertical axis of the frame, and a rugations on said spring plank adapted to nest
shim engaging surface on the bolster being corre
over said side frame corrugations, said corruga
guide column surface with outstanding ?anges
embracing said guide column for interlocking said
spondingly curved for allowing horizontal angling
while maintaining the same area of contact re
tions having upright faces in spaced relation and
adapted to engage upon relative horizontal an
gardless of bolster angularity.
gling movement of said spring plank with respect
3. A shim adapted to lock a bolster to an asso
ciated side frame comprising a base web and a
to the side frame, all of said faces being disposed 30
portion upstanding therefrom, one side of said up
standing portion being cylindrically concave and
terminating in surfaces radial with respect to
axis of said side frame, the included angle be
tween adjacent faces being substantially equal to
the permissible angling movement of said plank.
9. A spring plank in combination with spaced 35.
side frames, said spring plank having corrugated
the axis of said concave surface, the other side
of said shim being provided with straight sur
substantially radial with respect to the vertical
faces forming a notch for interlocking with re
spect to a guide column.
4. A shim adapted to lock a bolster to an asso
ciated side frame comprising a base and a portion
portions spaced apart adjacent each end thereof,
upstanding therefrom, one side of said upstand
ing portion being cylindrically curved and termi
nating in surfaces radial with respect to the axis
disposed to corresponding faces on said associated
of said curved surface, the other side of said shim
said corrugated portions having upright faces
substantially radial with respect to the vertical
axis of the associated side frame and angularly
40
side frame so as to permit a horizontal angling
movement of the plank with respect to the frame.
10. In a side frame, in combination with a
spacing intermediate portions of said members
spring plank, said side frame having a compres 45
sion member, a tension member, guide columns
spacing said members and spaced to form a bol
ster opening, corrugated portions on said tension
member extending longitudinally of said side
frame from a point adjacent the vertical axis 50
a spring plank received in said bolster opening
below said bolster, said spring plank resting on
substantially coradial with said vertical axis and
angularly disposed to corresponding faces of said
spring plank so as to permit a horizontal angling
being provided with substantially flat surfaces
45 disposed at approximately right‘ angles to one
another for interlocking purposes. _
_
I
5. A side frame comprising a compression mem
ber, a tension member, bolster guide columns
50 and spaced to leave a bolster opening therebe
tween, a bolster received in said bolster opening,
55 the tension member of said frame, and said ten
sion member being formed with upwardly and
longitudinally extending embossments received in
corresponding embossments in said plank, said
embossments having upright faces adapted to ‘en
60 gage and disposed substantially radial with re
spect to the vertical axis of the frame, said sur
faces being normally disposed with angular clear
ance therebetween corresponding to the permis
sible angling of the frame with respect to said
65 plank and bolster.
6. In a railway truck, in combination,-a pair of
‘side frames, a spring plank connecting said frames
and with its ends corrugated and interlocking
with corresponding corrugations on said frames,
70 said corrugations involving surfaces approxi
mately radial about the axis of relative angling
and normally spaced to correspond with the per
missible horizontal angling, whereby a de?nite
interlock is providedv between the plank and
76 frames with the provision of horizontal angling
thereof, said corrugations having upright faces
movement of said spring plank with respect to 55
the side frame.
_
11. In a railway truck, in combination, a side
framehaving a compression and tension member
connected by spaced guide columns to form a _
bolster opening therebetween, a bolster received
in said opening, a nest. of helical and elliptic
springs supporting said bolster from said ten
sion member, shims interposed between said bol
ster and guide columns, said shims comprising a
base and a portion upstanding therefrom, one 65
side of said upstanding portion being cylindrical
ly curved and terminating in surfaces coradial
with the vertical axis of said curved surfaces,
the other side of said shim being provided with
substantially ?at surfaces disposed at approxi 70
mately right angles to one another and positioned
adjacent correspondingly formed surfaces on said
guide columns.
.
,
12. In a railway truck, in combination, a side‘
frame having a compression and-‘p’. tension mem 75
'
5
2,182,384
ber connected by spaced guide columns to form
opening, shims adapted to lock the bolster-in the
a bolster opening therebetween, a bolster re
ceived in said opening, a nest of helical and ellip
opening and comprising a. base underlying a
portion of the bolster and a web interposed be
tween the bolster and guide columns, one surface
tic springs supporting said bolster from said ten
of said web being cylindrically curved and ter
sion member, shimsvinterposed between said bol
ster and guide columns, said shims comprising a minating in surfaces coradial with the vertical
base and a portion upstanding therefrom, one axis of said cylindrical surface, said bolster being
correspondingly formed and adapted to engage
side of said upstanding portion being cylindri
cally curved and terminating in surfaces coradial said curved and radial surfaces, another surface
10 with the vertical axis of said curved surfaces, _ of said shim being provided with substantially 10
the other side of said shim being provided with ?at surfaces disposedat approximately right an
substantially ?at surfaces disposed at approxi
gles to one.an0ther and positioned adjacent cor
mately right angles to one another and positioned respondingly formed surfaces von said guide col
adjacent correspondingly formed surfaces on said umns, and upstanding spaced lugs on said shim
15 guide columns, said shim base being positioned in base extending into recesses formed in said bol 15
a recess formed in the bolster and provided with
a concave surface juxtapositioned with respect to
a correspondingly formed surface in said recess.
13. A shim adapted to lock a bolster to an as
20 sociated side frame and comprising a base and
an upstanding portion, one side of said upstand- '
ing portion being cylindrically concave and ter
minating in surfaces radial with respect to the
axis of said concave surface, the other side of
25 said shim being provided with straight surfaces
forming a notch for interlocking with respect to
a guide column, and said base having a concave
surface coaxial with said concave surface of said
upstanding portion.
30
14. A shim adapted to lock a bolster to an as
sociated side frame and comprising a base and
an upstanding ?ange, one side surface of said
?ange being concave and cylindrically curved and
terminating in surfaces radial with respect to
35 the axis of said cylindrical surface, said base hav
ing a concave surface coaxial with said ?ange
concave surface about a vertical axis.
15. A shim adapted to lock a bolster to an as
sociated side frame comprising a base and a
40 ?ange upstanding from adjacent one edge there
of, said ?ange and base having spaced side cylin
drical concave surfaces coaxial about a vertical
axis. ‘
16. A spring plank in combination with a side
45 frame, said spring plank having corrugated por
tions spaced apart and adjacent an end thereof,
said corrugations having substantially upright
faces substantially radial with respect to the
vertical ‘axis of said side frame and angularly
50 disposed to corresponding faces on said side
frame so as to permit a horizontal angling move~
ment of the plank with respect to the frame.
17. In a railway truck, in ‘combination, a side
frame comprising spaced guide columns de?ning
55 a window opening, a bolster received in said
ster.
'
18. In a railway truck, in combination, a side
frame comprising spaced guide columns defining
a window opening therein, a bolster having an
end portion received in said opening, shims 20
adapted to lock the bolster in said opening hav
ing a base underlying a portion of'said bolster
and an upright stem interposed between said bol
ster and guide columns, one side of said stems
being cylindrically concave and terminating in 25
surfaces radial with respect to the axis of said
' concave surfaces, the other side of said stems be
ing provided with straight surfaces forming a
notch for interlocking with respect to the guide
vcolumns, and said base having a concave surface 30
coaxial with said concave web surface and posi
tioned adjacent a correspondingly formed convex
surface in said bolster.
‘
19. A bolster having spaced cylindrically con
vex coaxial surfaces formed adjacent each end
thereof, spaced radial surfaces de?ning said con"
vex surfaces and radial with respect to the axis
of said convex surfaces, spaced recesses on the
underside of the bolster adjacent each end there
of, and convex surfaces in said‘recesses coaxial 40
with said cylindrical surfaces.
20. A shim adapted to look a bolster to an as
sociated side frame comprising a base adapted to
underlie said bolster and an upstanding web,
spaced ?anges adjacent the sides of the web, said 45
web and ?anges having one side thereof formed
with substantially straight surfaces to form a
notch for interlocking with respect to a guide.
column, the opposite side of said web and ?anges
having a cylindrically concave web surface ter
minating in ?ange surfaces radial with respect to
the axis of said concave surface, and upstanding
lugs on said base adapted to extend into corre
spondingly formed apertures in said bolster.
DONALD S. BARROWS.
65
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