US2392597A

US2392597A - Car truck

Info

Publication number: US2392597A
Application number: US491599A
Authority: US
Inventors: Leo A Lehrman
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1943-06-21
Filing date: 1943-06-21
Publication date: 1946-01-08
Anticipated expiration: 1963-01-08

Description

Jan. 8, 1946. 1 A. LEHRMAN GAR `TRUCK Filed June 21, 1945 3 Sheets-Sheet l ,xA 1,074.0 ,0W 6m 2 o2 3 z 2. im@

INVENToR.

Jan. 8, 1946. l... vA. LEHRMAN CAR TRUCK I 5 Sheets-Sheet 2 Filed June 2l, v1943 i12 12@ je@ 122 154 101v INVENToR. l

yum?, j BY Jan. 8, 1946. L. A. LEHRMAN 2,392,597

CAR- TRUCK Fil'ed June 21, 1943 5 Sheets-Sheet 3 y' .1o 1l 13611@ 112 Patented Jan. 8, 1946 CAR TRUCK LeoA. Lehrman, Chicago, Ill., assigner-to American Steel Foundries, Chicago, lll., a .corporation of New Jersey Application mme, 21, 1943, sesamo. 491,599

(circs-419i) -26 Claims.

My invention reiates `Vto railway ycar vtrucks and more particularly to a ltruck incorporating a ride control .device'by 4means ofv which Afric'tiona-l con- .trol .fis aiiorded yof the oscillation of the Kbolster supporting coil `spr-ing lgroup.

An .object o'f my invention is to `design -a vride control Struck incorporating a snub-up. device `w'fh'ich operates Ato develop la :greater amount of frictionfduring upward v-i'novement of 'the bolster than 'that which is developed during downward movement thereof.

A specific objectof my invention is to design a truck -such as above described wherein 'friction shoes are pocketed iin opposite-sides of the bolster and in wedge engagement therewith, said Yshoes compensate for wear Yof the -fric'tion :surfaces is easily accessible without .removal of any single part of the stabilizing means or disturbing any other vpart of the truck.

My invention comprehends friction shoes of novel yform, certainof said shoes comprising bolt openings therethrough 'interrupting the wedge surfaces thereon, and other of said shoes comprising wedge surfaces `angularly disposed with respect -to abutment surfaces for an associated actuating member, said vsurfaces being crowned to afford rocking movement vof the shoes Iagainst the bolster 'wedge surfaces and vagainst the actuating member.

Figure 1 is a fragmentary yside elevation votra. railway car truck comprising one embodiment of my invention.

Figure '2 Vis a `fragmentary top plan View fof the structure shown Yin Figure l with A-the side frame shown'in section through one of the columns, and Figure '3. is a sectional view taken lsubstantiallyin the vertical longitudinal plane indicated' 'by the line 3--3 of 'Figure 2.

Figures 4 to 6 inclusive showthegnovel friction shoe utilized in Figures f1 to 3, Figure .4 being a front elevation taken from the column engaging face r`of the shoe, Figure -5 being a top plan view, and Figure 6 being a sectional view taken inthe plane indicated by the 'line /6-6 of Figure v`'Figures 1'1 to 11 inclusive illustrate -a modification lof my invention,i`igure 'Tbeing a fragmentary side elevation ofarrailway car truckwith the -bol'ster yand the associated lfriction ymeans shown 1in section in approximately the Avertical longitudinal plane bisecting 'the' side gframe, 'Figure 58 being .a fragmentary `:top I'plan JView fof lthe structure shown in Figure 7, Figure 9 being `a sectional View taken `in the transverse vertical plane indicated by the line 9-19 'of Figure 7,

the bolster with the friction means dissociated l therefrom, and Figure' '11 being a sectional View taken :in 'the plane indicated 'by the 'line ltI--I'l o'f Figure 10.

`fFigu-re '12 is a yside elevation, Ipartly cin section, of 4a rail-way car truck illustrating another lmodi- -cat'ion of my invention.

Describing vmy-novel 4ride control truck `in .detail :and referring first tothe :embodiment 'thereof illustrated in Figures '.-1 to Ginclusive, the iside frame comprises :a .compression memberr f2` and a tension member 1l merging adjacent each end thereof with a column 6 to define a bolster @opening 8 `having Ya widened Vupper portion :to :'for a purpose 'hereinafter more fully described.

The tension 'member is of conyentiona1'box section -with vthe top chord lthereof `affording a vseat at `|"2 (Figure 1`) 'for the tbolster supporting coil springs :diagrammatically indicated :at i4,

I-'4 (Figures land 2). The 'tension member fis per ends of said springs afford a `seat as vat 't8 (Figure l) for the bolster generally designated 20,*saidbols'terbeing of box-section witha pocket Z2 in each side thereof, said pocketzbeing ldeiined by inboard and outboard Webs 2'4'.and 26' and 'by the rear web 28 affording a #diagonal or wedge surface 3'0, as best Aseen in Figure f3, for cooperation with the associated friction shoe. It will be'noted that the web 2*8 fis lslotted as at '32 adjacent its juncture with the bottom Wall 34 ofthe bolster for the reception o'f :a bolt :and nut Ias'- sembly affording actuation of the associated friction shoe, as hereinafter more 'fully described.

The bolster 2U 'is provided at each side thereof with Vin'board and outboard guide 'lugsorgibs 36 and'3'8, and it will be noted from fa consideration of Figure 1 that the outboard gibs 38, 3'8 :are of less dep'th than that lof the widened upper Yportion I1l) of the bolster lopening whereby the bolster may be elevated in :said -`opening andk :removed provided on the front face thereof With a friction surface 44 for engagement as at 46 (Figures 2 and 3) 'with the Vadjacent column mounted wear plate 46, and said shoe comprises on the opposite face thereof a wedge surface 5|)v (Figure 6) forV complementary engagement ras atv 52Y (Figure 3) with the wedge surface 30 of the'adjacent web 28 of the bolster. It will be seen from a consid-Y of the shoe is crowned to afford a rocking action thereof against the surface` 30. `A substantially vertical opening 54` extends ,through the shoe 40 for therreception ,of an associated bolt and nut assembly 56, the opening 54 being square at the top thereof as at 58 to afford an interlock with thehead of the bolt which vis afforded a seat as at 60 against a shoulder formed within the opening'54. i` y Sleeved over the bolt is a spring 62, here shown as a coil spring and seated as at 64 against they The'A bolt also carries ai bottom of the bolster. spring plate 66 for abutmentiwith the opposite end of the'spring 62, anda nut`68 is threaded on the lower end of the bolt toraiford adjustable compression of the spring 62 against the bottom of the bolster. It will be understood that friction will be developed at 46 between each shoe and the associated wear plate-during vertical movementof the bolster within the bolster opening, a greater amount of friction being developed on the upstroke of the bolster than on the downstroke thereof, inasmuch as the wedge surface 30 of the bolster.v slopes downwardly j toward the adjacent column. 'o 1 Y YA modification of my invention is shown in Figures 7 to 11 inclusive wherein the side frame Y generally Idesignated |62 is substantially the same as that shown in Figure l, Ysaid-frame including the spaced columns' |04, |04 partially defining the bolster opening |06 havingaY widened upper por- Y tion |01 to permit removal Tof the bolster and the associated friction means` from the topzof the bolster opening substantially Yas in the previous embodiment of my invention., Seated on the side Yframe'are the bolster supporting coil springs,

diagrammatically indicated at |08, |08, and affording support as at ||0 ,for the bolster,1gener ally designated ||2, said bolster being shown in detail inFigureslO and l1 and being -a'boX-like structure having the topl 4andgbottom walls ||4 and ||6 merging with spaced inboard and out-- board transverse walls ||8 and |20, the top wall I4 having a downwardly offset portion |22 (Figlures 1 and 11) intermediate the walls 8 and |20 tofdene therewith aY recess |24 fora purpose hereinafter'described... L

A 'spring seat |26 vis formed on the bottom surface of the offset portionV |22Y and said oiset portion gisprovided with ari-opening |28 therethrough centrally of said seat. The bottom wall ||6 of the L'bolster is provided with an opening V|30 aligned with the seat |26. YAt each side of the bolster is a diagonal' wall |32 merging with `eration of Figure 3 that the wedge surface 50 |32 presenting a wedge surface |34 for complementary engagement with an associated friction shoe, as hereinafterdescribed.V Thebolster also comprises a side wall |36 at each side thereof and an intermediate longitudinal rib |38, substantially parallel with said side wall, and on each side of said bolster are inboard and outboard gibs |40 and |42'for interlocking engagement with the adjacent column |04 as in the previous embodiment of my invention, the outboard gibs |42, |42 being of less depth than'the widened upper' portion |01 o f the bolster opening, as in the previous embodiment, to permit elevation an-dremoval of the bolster from the top of the Vbolster opening together with the associated friction means.

At each side'of the bolster is disposed a friction shoe generally designated |44, said shoe being generally similar to that shown in Figures 4 to 6 inclusive and comprising on one side thereof a friction face for engagement at |46 withthe recess |50 on the top thereof 1 for lthe reception i of the adjacent end of an actuating plate |52, and the shoe is provided with a crowned abutment surface |54 (Figure 7) for engagement with said plate |52. It may be'noted that each shoe is' coredl away as at |56 to lighten the same.

It will be understood that the bolt and nut assembly|62 may betightened'to afford adjustable compression of the springV |58,'reaction of ysaid spring being transmitted by the bolt and nutassembly to the plate I5?` which bears against the surfaces |54, |54 onv the friction shoes to urge the same downwardly and outwardlyv into engagement at |46,v |46 with the adjacent columnv mounted wear plates, as heretofore described. vWhen it is desired to remove the bolster from the bolster opening |06 duringa quick wheel change,I the bolt and nut assembly |62 may be loosened to Vrelease the pressure against the friction shoes,

' Y bolster opening and removed fromrthe widened portion |01 thereof,substantially as inthe previously described embodiment. s'

Another modification of my invention is shown in Figure 12 Vwherein the side frame comprises the compression member 202, the .tension member 204, Vand a column 206 merging therewith adjacent each end of the frame to define a bolster opening 208.- Seated at 201 on the side frame are the bolster supporting coil springs diagrami matically indicated at 2|0, said springs aifording a seat as at 2|2 for the bolster, generally designated 2|4,'said bolster being substantially iden- Y tical with that disclosed in Figures 1 and 2 and theoffset 22 of the top wall ||4 and sloping Y downwardly and outwardly to f merge with the bottom wall I 6 of the bolster, each diagonal wall comprising at each side thereof the diagonal web 2|6 affording' a wedge surface 2Y|8 forl complementary engagement with'a wedgesurface on an encarar associated friction .'snoe, `generallyzirlesignated 22B., vsaid :shoediaving 15...',f1'cr1t .friction face in. fr-ic- Itional engagement :as :at1222 with 'fthe :adiacent column mounted *mear* :plate .-1224, On the top thereof the shoe is `.provided with arecess 22.8 for the. reception `of :a sco'l :spring A228 seated :as :at ZS'Ucagainst the shoe :and in abutment "at the sopposite .end with fa `springplate .232 .carried by the bolt and nut .assembly 234, -said assembly ,being engaged as :at 236 with :the :bottom :ofthe .bolster land extending upwardly throughzaslot 12318 therein and through an :opening 240 :in thefshoe 22B..

It Will be understood-thatthe boltfandmltassembly .may be tightened to :adjust the compres- Ision 'of thefspring 228l :against the :'shoe, :andlike- Wise, the .bolt and .nut assembly may be .loosened yduringl 4assembly and disassembly of the ,bolster and `friction shoes with respect to the lside frame. ,It may .be .noted that `the bottom :chord :of the box-section `compression member is cored away :at v242 to afford clearance for the -bolt and nut Iassembly during vertical voscillation `of the Fbolster and Ito lfacilitate assembly fand disassembly of the bolster with the side frame. vIt may also be noted -that .ein this, as well as in the previous embodiments of my invention, fthe wedge surface .of vthe yfriction shoe .is crowned to rafford a rocking action Kthereof against the ybolster wedge surface 218.

It ,is .to be understood that I-donot wish to be limited by the exact fembodiments of the device shown which `are merely by way of illustration and not limitation as variousand other .formsof the device will, of course, be apparent VAto rthose skilled ,in the art without .departing .from vthe spirit of lthe invention or the scope of the claims.

'I claim:

vl. In `a railway car truck, a side frame having spaced columns and .an intervening bolster opening, a spring group on said `frame in said opening, a 'bolster member supported from said group and having a pocket 'in at least one side thereof, and a wedge surface in said pocket Vsloping toward the adjacent column, a Wedge member in said pocket'in engagement with said surface and in frictional engagement with said column along a vsurface extending transversely lof ysaid frame, a 'substantially vertical coil spring Vin said 4opening 'and seated against one of said members, `a substantially vertical 'bolt sleeved within said spring, a spring plate on one rend -of said bolt in abutment with said spring, means operatively connecting the other end `of ysaid -bolt with rthe Vother of -said members, and a nut ori-said -bolt for adjustably compressing said spring lplate against lsaid spring, said bolt extending through Aan opening in 'said bolster member and being housed Vtherein for a substantial portion of the length of ysaid bolt. 2. In Va railway car truck, aside frame having spaced columns and an intervening'bolsteropening with ya widened upper portion, jaspring group 'on said frame in said opening, :albo'lstersupported fromsaid group, said bolster vvhaving-wedge means at opposite sides thereof, friction 'shoes fin wedge engagement with respective Wedge means 'and in frictional Aengagement with :respective 4columns, resilient means in said `bolsteropeningsand com- -pressed yagainst the underside of 'a wall :of said bolster, and means connecting the bottom fofzsai'd resilient means with the topsof Asaid shoes, :said bolster having inboard land outboard gibs 'for interlocking vengagement lwith reach column, the 'outboard gibs being vof less fdepth than rsaid widenedlupper portion of saidbclster opening *wherefby ythe bolster may be elevated therein and removed therefrom while V:said friction and resilient means remain fin fnormal assembled `relaiiionshipwith the bolster.

3.. In a railway car truck, :aside frame having spaced columns and an intervening bolster .opening, :a Aspring group onfsaid .fra-me in Isaid opening, a, bolster member :supported from :said group and `leaving 'a wedge surface at each' side 4thereof sloping downward-1y toward the .adjacent column, `a friction member .in engagement with said surface .and .in frictional engagement with the 4adjacent column along a. flat surface lying in a plane-substantially parallel with the longitudinal airis of said v`bolster :mem-ber, :resilient .means .in said bolster opening, :said resilient meansA being independent ofsaid spring grou-p and being compressed :against onel of said members, substantially vertical .rigid means engaged with Asaid resilient means, means operatively connecting said vrigidlmeans with thev other of said members for 'transmitting reaction of :said vresilient -means thereto., said rigid means extending vertically through an opening ,-in 'said bolster .member and being partially housed th'erein, and means associated with said .rigid means for adjusting the compression of ,said resilient means.

4. .In a railway car truck, aside frame having vspaced columns .and anrintervening `bolster opening, a spring `group yon said frame in said opening, abolstermember 'supported from said group and having .apocket in at least one vside thereof, and 'awedge surface in'said pocket sloping downwardly .toward .the 'adjacent column, a wedge member ysaid `pocket .in engagement with said vsurface and in frictional -engagement with lsaid column along a yflat substantially vertical surface lying in la plane 'approximately perpendicular to the lllane of Isaid frame, a substantially vertical coil springzin said'opening and seated against one of said members, a substantially vertical bolt sleeved within said spring, aspring plate on one end of said bolt in abutment with said spring, means operatively connecting .the other end 'of said bolt =with 'th'e other of vsaid members, ,and a nut on said bolt for adjustably compressing said spring plate against said spring.

5. In a Arailway car truck, a side frame having spaced columns land lan intervening bolster opening, `a spring Igroup on said frame in said .openvving, abolster supported from said group and hav- `ingzvvedge surfaces at opposite sides thereof sloping downwardly towardrespective columns, friction lshoes in engagement with respective of said :surfaces and in .frictional engagement with re spective columns, resilient means in said opening .and independent of said group, said means being compressed against a downwardly facing surface on .said bolster, and means for adjustably compressing vsaid, resilient means, said compressing meansincluding substantially verticalrigid means .extending .through said bolster :and operatively connected to saidshoes for transmitting reaction of saidresilientmeans thereto.

`6. .In a railway car truck7 a side frame having spaced lcolumns and an intervening bolster opening, a spring group on .said frame in said open- `ing, 'a vbolster :supported on said group and having wedge surfaces at opposite sides thereof sloping 4downwardly toward respective columns, friction 'shoes engaged with respective of Asaid surfaces and in frictional engagement with respective columns, ia Vplate extending `transversely of said bolster and bearing zagainst the :shoes at opposite sides thereof, a spring ypartially housed within ,-said bolster, said .spring being Lseated at `one end thereof .against a downvvardlyV facing surface Zon said'bolster, and means lfor compressing-said spring, said means includinga rigid. member 'connected to the opposite end thereof and conthe adjacent column, resilient means in 'said bolster opening, said resilient means being Vinde-A pendent of said spring group and being c ompressed' against one of said members, and substantially vertical vrigid means engaged with said resilient means andwith the other of saidme'mbers totransmit reaction of said resilientmeans thereto, `said rigid means v'extending vertically through said bolster member and being partially housed therein. 'V l 8.' In a railway car truck, a side frame having spaced columns and an intervening bolster opening, a spring group on saidrframe insaid open-.L

ing, a bolster supported on said spring group and Y Vhaving wedge surfaces at Vopposite sides thereof Y sloping downwardly toward th'e adjacent columns,

friction shoes in complementary engagement with respective wedge surfaces and in frictional 'engagement with respective columns,Y and actuating Vmeans for each shoe comprisinga spring seated against the bottom of said bolster and depending therefrom', a bolt and nut assembly extending upf wardly through aslot in said bolster and inter-` locked with said shoe,rand a spring plate carried by the 'lower end of Said assembly for abutment with the lower surface of said spring.

' 9. In a railway car truck, `a sidev frame having spacedV columns and an Vintervening bolster opening, a spring group on' said frame in said opening,

a bolster supported from said group, said bolster i having wedge means at opposite'sides'thereof, friction shoes in wedge engagement with respective wedge means and in frictional engagement withrespective columns, resilient means'in said bolster opening and compressed against a wall of said bolster, and means connecting the bottom of A said 'resilient means with said shoes, said vcon- Y, necting-means comprising rigid means carrying vabutment means for the bottom of said resilient means, and a connection between saidirigid means and the tops of said shoes. Y 1 i' lO. In a railway car truck, a side lframe hav'- ingrspaced columns and an intervening bolster opening, a spring groupon saidrframe in-saidV opening, a bolster supported'from'said group and having wedge surfaces at opposite sidesthereof sloping downwardly toward respective columns, friction shoes in engagement with respective of said surfaces and in frictionalengagement Vwith respective columns,y resilient means in said openling'and independent of said group, saidrmeans being compressed against a downwardlyfacing surface on said bolster, and means for adjustably compressing said resilient means, said compress'- ing means being operatively connected to the' tops of said shoes for transmitting reaction of said resilient means thereto.

11. In a railway car truck, a side' frame having spaced columns andan intervening bolster opening'a. spring group onsaid frame in said opening, a bolster memberV supported Afrom said-.group and having awedgesurface fatea'ch side thereof sloping downwardly toward the' adjacent'cblumn', a friction member in engagement with said.sur face and in frictional engagement with the'adjacent ,columnv along a surface,extending trans-'- versely. of said frame, resilient means in said bolster opening,V said resilientmeans being independent `of ksaid spring group and being compressed against one lof said members, and substantially verticalrigid means operatively associated with 'said resilient means and With'the other of said members to transmit reactionV of said'resilient means thereto. Y s VV12.'In a railway car truck, a sidelframe' havving spaced columns and an intervening 'bolster opening, a springgroup on sadframe insaid opening, a bolster supported on said group and comprising wedge surfaces at opposite sides thereof sloping downwardly toward respective columns, friction. shoes in engagement with respective lof saidsurfaces and in frictional engagement with respective vcolumns along fiat vertical surfaces lyingrin respective planes approximately perpendicular to the longitudinal plane of said'fr'ame, and actuating means for each' shoe comprising a spring seated thereagainst and a bolt and nut assembly engaged with the bottom of saidbolster and the top of said spring,.said bolt and nut vassembly extending vertically through a slot in said bolster and througnan opening'insaid shoe. 1 i

13. In a bolster for a railway cartruck, a box-Y like member havingitopand rbottom walls and spaced transverse walls merging' therewith, said top wall having a4 downwardlyoifset portion intermediatesaid transverse walls, and oppositely sloping diagonal walls merging with said, .offset portion andsaid bottom wall at Yoppositesdes of the bolster, a ,spring seat on the bottom of said offset portion, an opening through saidr` portion centrally of said seat, and an opening through said bottom wall in alignment vwith saidiseat and adapted for th'e receptionv of an associated spring.

14. In a bolsterfor'a railway car truck, aboxlike memberv having top .and bottom walls and spaced transverse walls merging therewith, said top wall havingr a downwardly offset portion intermediate said 'transverse walls andl defining Vtherewith a recess for the reception of actuating means for anassociated friction absorbing device, and oppositely sloping diagonal walls merging with said offset portion and said bottom wall at opposite sides of the bolster, said diagonal walls presenting wedge surfaces for cooperationV wit associated friction shoes.

15. In a railway car truck, a sideframe having spacedcolumns andan intervening bolster open-r ing, a spring group on said frame in said opening, a bolster supported from saidv group, said bolster having wedge means at opposite sides thereof, friction shoes in wedge engagement-with re` spective wedge'means and in frictional engagement with respective columns, resilient means in said bolster opening and compressed against aV wallof saidfbolster, and means connecting the bottom of said'resilient means with said shoes.

A16. In a railway car truck, a sidevfr'ame having spaced columns andan intervening bolster opening, a spring group on said frame in said wall of said bolster, and means supporting the bottom of said resilient means from said shoes.

17. In a railway car truck, a side frame having spaced columns and an intervening bolster opening, a spring group on said frame in said opening, a bolster member on said group h'aving a Wedge surface on at least one side thereof, sloping downwardly toward the adjacent column, a friction shoe member engaging said surface andA also engaging said adjacent column along a surface extending transversely of said frame, and actuating means for said shoe member comprising resilient means in said bolster opening between said columns compressed against one of said members, a substantially vertical bolt and nut assembly connected to said resilient means, and means affording an operative connection beween said assembly and the other of said memers.

18. In a railway car truck comprising a side frame including spaced columns and a bolster member spring-supported from said frame between said columns, the combination of a wedge member in wedge engagement with said bolster member and in frictional engagement with the adjacent column along a surface extending transversely of the frame, resilient means compressed against one of said members, and vertical means extending through both of said members for transmitting reaction of said resilient means to the other of said members.

19. In a railway car truck comprising a side frame including spaced columns and a bolster member spring-supported from said frame between said columns, the combination of a wedge' member in wedge engagement with said bolster member and in frictional engagement with the adjacent column along a surface extending transversely of the frame, resilient means compressed against one of said members, and vertical means extending through said members for transmitting reaction of said resilient means to the other of said members, said resilient means being housed for the major portion of its length within the bolster member.

20. In a railway car truck comprising a side frame including spaced columns and a bolster spring-supported from said frame between said columns, friction means including friction elements in wedge engagement with said bolster and in frictional engagement with said columns, resilient means compressed against abutment means on the bolster, and means for transmitting reaction of said resilient means to said elements including a member extending longitudinally of said frame and operatively engaged with said elements.A

21. In a railway car truck comprising a side frame including spaced columns and a box-section bolster resiliently supported from said frame between said columns, the combination of friction shoes in wedge engagement with said bolster and in frictional engagement with said columns, resilient means compressed against downwardly facing abutment means on the top wall of said bolster, and means for transmitting reaction of said resilient means to said shoes including a rigid member extending longitudinally of said frame and operatively engaged with said shoes.

22. In a railway car truck comprising a side frame including spaced columns and a bolster spring-supported from said frame between said columns, the combination of friction means including shoes in wedge engagement with said bolster and in frictional engagement with respective columns along surfaces approximately parallel with the longitudinal axis of said bolster,

resilient means compressed against the tops of said shoes, and vertical means for transmitting reaction of said resilient means to said bolster comprising rigid members extending through portions of said bolster and respective shoes for connection to respective resilient means.

23. In a railway car truck comprising a side frame including spaced columns and a bolster spring-supported from said frame between said columns, the combination of friction shoes in wedge engagement with wedge faces on said bolster and in frictional engagement with respective columns along substantially vertical surfaces approximately parallel to the longitudinal axis of said bolster, resilient means compressed against upwardly facing abutment means on said shoes, and means for transmitting reaction of said resilient means to said bolster comprising bolt and nut assemblies connected thereto and to' said resilient means, each of said bolt and nut assemblies extending through an opening in said bolster interrupting the associated face.

24. In a railway car truck comprising a side frame including spaced columns and a bolster spring-supported from said frame between said columns, the combination of a friction shoe in frictional engagement with the adjacent column along a surface extending approximately parallel with the longitudinal axis of the bolster, said shoe being in wedge engagement with said bolster, resilient means compressed against upwardly facing abutment means on said shoe and a rigid member extending through overlapping portions of said shoe and said bolster for transmitting reaction of said resilient means thereto.

25. In a railway car truck, a side frame including spaced columns, a spring group supported by said frame, a bolster supported by said group between said columns, a friction shoe having a wedge face in complementary engagement with a wedge face on said bolster, said shoe being in frictional engagement with the adjacent column along a surface approximately perpendicular to the longitudinal plane of said frame, resilient means compressed against said shoe, and a bolt and nut assembly operatively connected to said resilient means and to said bolster, said assembly extending through openings in said shoe and said bolster interrupting said faces.

26. In a railway car truck comprising a side frame including a column and a bolster member spring-supported from said frame adjacent said.

column, the combination of friction means including a shoe member in wedge engagement with the bolster member and in frictional engagement with said column along a surface extending transversely of said frame, resilient means compressed against abutment means on one of said members, and means for transmitting reaction of said resilient means to the other of said members comprising rigid vertical means extending through overlapping portions of said members.

LEOy A. LEHRMAN.