US2465763A - Stabilized car truck - Google Patents

Description

March 29, 1949.

R. c. TAYLOR STABILIZED CAR TRUCK 2 Sheets-Sheet 1 Filed June 19, 1944 ww w n NQ QM INVENTOR. 4 @wsefl giqja y or March 29, 1949. R. c. TAYLOR STABILIZED CAR TRUCK 2 Sheets-Sheet 2 iwsell I v MAM-M/ Filed June 19, 1944 Patented Mar. 29, 1949 STABILIZED CAR TRUCK Russell 0. Taylor, Chicago, Ill., assignor to American Steel Foundries, Chicago, 111., a corporation of New Jersey Application June 19, 1944, Serial No. 541,026

31 Claims. 1

My invention relates to railway car trucks.

The general object of my invention is to provide novel friction and stabilizing means controlling oscillations of the springs supporting the bolster and maintaining the bolster in horizontal position under service conditions.

Another object of the present invention is to provide novel friction and stabilizing members on opposite sides of the bolster for engagement by the columns of the side frame, the engaging surfaces of each member and the associated column being so constructed and arranged as to maintain the members and columns in a given relation to each other.

A specific object of the invention is to provide a friction plate of novel form disposed between the bolster and columns of the side frame, each of said plates having a vertical friction surface engaging a corresponding surface of a springurged shoe in the associated side of the bolster and a spherically curved surface engaging a corresponding surface of the associated column whereby tilting of the side frame with respect to the bolster is accompanied by pivotal movement of the columns of the side frames relative to their associated friction plates, with transmission of pressure from said shoes horizontally to the columns of the side frame in the various positions of the columns, resulting in the bolster being stabilized in horizontal position irrespective of the tilting of the side frame about the center of curvature of the engaged concentric surfaces of the plates and columns.

It will be apparent to those skilled in the art that my invention is equally applicable to any type of standard truck, although it is shown as applied to a truck of the well-known quick wheel change type.

In the drawings, Figure 1 is a fragmentary view in side elevation, partly in section, of a railway car truck embodying my invention, the ends thereof being broken away.

Figure 2 is a View taken in the transverse horizontal planes indicated by the line 2--2 of Figure 1.

Figures 3, 4 and show the form of friction shoe used in the bolster, Figure 3 being a top plan View thereof, Figure 4 a side elevation, and Figure 5 a rear view taken from the right as seen in Figure 4.

Figure 6 is a fragmentary sectional view comparable to the right half of Figure 2, but showing the projecting guide flanges of the bolster and columns beveled.

Referring to the drawings, there is shown in Figures 1 and 2, a truck frame comprising a compression member 2, inclined tension members 4, 4, a lower horizontal tension member 6, and columns 8, 8, joining the compression member 2 and tension member 6 and defining with said members a bolster opening I0, within which may be received the end of a bolster I2.

As shown in Figure 2, each column 8 is of U-section comprising inboard and outboard webs i4 and i6 and a transverse vertical web [8.

The bolster cooperates with the column guides 20 of the inboard and outboard webs l4 and I6 of the side frame by means of the spaced plane surfaces 22 formed on the guide flanges or lugs 24 of the bolster I2.

Coil springs, diagrammatically indicated at 26, are seated upon the spring seat 28 of the tension member 6 and support the bolster, said tension member being widened below said bolster opening to form said spring seat and being afforded an upstanding outboard flange 30 and a similar inboard flange, not shown, said flanges forming between said spaced columns 8, 8, a welllike cavity within which the springs may be seated and retained against possible accidental loss.

The bolster I2 is formed to provide pockets 34, 34 in opposite sides thereof in each of which is resiliently supported a friction shoe 36 in diagonal frictional engagement with the bolster as described in detail in Application Serial No. 436,- 731, of David M. Light and issued as United States Patent No. 2,378,414, June 19, 1945, and as will now be described to illustrate my invention.

More particularly, the bolster comprises top and bottom walls 38 and 40, side walls 42 and the intermediate transverse wall 44 parallel with the side walls. Each of the pockets 34, 34 is defined by the top wall 38, rear walls 46, 46 and spaced inboard and outboard vertical walls 48 and 50. At opposite sides of each pocket are ledges formed by diagonally arranged inboard and outboard webs 52 and 53, said webs being strengthened, respectively, by the vertical webs 54 and 55 merging with the bottom wall of the bolster at opposite sides of the pocket.

Each friction shoe 36 is recessed within the associated pocket 34 and is seated against the diagonal Webs 52 and 53. The friction shoe 36 is shown in detail in Figures 3, 4 and 5 and said shoe comprises the front and rear walls 56 and 58 and the bottom wall 6%. The shoe 36 also comprises the side walls 62, 62, generally triangular in shape and presenting on the bottoms diagonally arranged friction faces 64 in complementary frictional engagement as at 66 with the webs 62 and 53 of the bolster by being resiliently urged thereagainst by a coil spring diagrammatically indicated at 6B. The coil spring 68 is seated on the bottom wall of the shoe and against the top wall of the bolster, said spring extending between the diagonal webs 52 and 53 and being operative to urge the shoe into engagement therewith and toward the vertical web E8 of the column 3. The front, rear and side walls of the shoe are arcuately formed on the inner surfaces thereof, as shown at 12 in Figures 2 and 3, in order to accommodate and position the spring 68 seated on the bottom wall 60. The rear wall 58 of the shoe comprises a loop 14 defining the slot l6, said loop extending through an opening in the walls 46, 46 of the pocket 34. It will be apparent that a bar may be inserted in the slot 16 to permit the withdrawal of the shoe from the bolster opening during assembly of the truck, as hereinafter more fully described.

The present invention resides in the provision of novel friction and stabilizing means, whereby not only do the shoes impart pressure to members at the sides of the columns, under the action of the spring 68, for generating friction opposing vertical movement of the bolster and, snubbing oscillations of the bolster-supporting springs 26, but, at the same time, the pressure of the shoes is horizontally and uniformly distributed to the sides of the columns in various tilted positions of the columns, with resultant enabling of the bolster to remain in horizontal position irrespective of the plane in which the side frame may be tilted under track conditions. To this end, I pro- I vide each of the transverse vertical webs l8 of the columns 8 with a concave pocket 78 defining a surface 80 formed as a spherical segment. Between each column and shoe is a rectangular friction plate or stabilizing member 84 having a vertical friction surface 86, on one side thereof, slidably engaging a corresponding surface 88 on the associated shoe. The other side of said plate may be formed with an uninterrupted convexly curved surface defining a spherical segment and corresponding to the curvature of the surface 80, but, in the embodiment of the invention now preferred, this side is formed with a recess defined by a peripheral edge portion 92 having a spherical surface 64 convexly curved to correspond to the surface 86 for engaging the same. In Figures 1 and. 2, the center of curvature of each of the surfaces 86 and 94 is struck from a common center located approximately at the lonitudinal axis of the bolster. To insure frictional contact between the surfaces 88 of the shoes and the surfaces 86 of the plates 8 upon downward movement of the bolster, the lower portion of each of the plates extends downwardly a sufiicient distance to provide a substantial area of contact between the shoes and plates during such movement of the bolster. Each of the plates 84 is mounted in the space between the associated pair of guide flanges 24 of the bolster, as shown in Figure 2.

It may be noted that the plates 64 are slidably held within the pockets 18 by the friction surfaces 88 of the shoes being resiliently urged against the friction surfaces 86 of the plates by the coil spring 68, which in turn will cause the correspondingly curved surfaces 80 and 94 of the columns 8 and plates 84, respectively, to be maintained in engagement.

From the foregoing description, it will be apparent that loads or force's imparted to the bolster ent that, due to the engagement of the vertically curved concave surfaces 86 Of the columns 8 with the corresponding vertically curved convex surfaces 8 of the plates 84, the pressure of the shoes 36 on the vertical friction surfaces 86 of the plates 84 will be applied horizontally through the shoes to the columns regardless of the angular tilting of the side frames relative to the bolster, for example, upon the occurrence of vertical pivoting movement of the side frame relative to the bolster during travel over rough track or when the side frames become out of square with the bolster during travel over curved track. Also, as the pressure imparted to the columns of the side frames by the shoes 36 will be horizontal but in opposite directions, the forces tending to tilt the bolster out of horizontal position during the pivoting of the side frame about the center of the curvature of the spherical surfaces of the columns 8 and plates 84 will be prevented and the bolster will be stabilized in a horizontal position.

Thus, when the above conditions are met, the friction surfaces of the plates will automatically assume a position parallel to the contacting friction surfaces of the shoes and remain in alignment therewith for the pressure of the springs 68 urging the shoes against the plates will maintain the plates and shoes in their vertical aligned positions. In the event the side frame should have a tendency to move up and down in the vertical as it moves at crossrail joints, crossings, etc., equalization will take place between the curved surfaces of the frame columns and plates, and the bolster will remain stabilized in its horizontal position.

Referring now to Figure 6, the structure there shown is similar to the structure shown in Figures l to 5 inclusive, with the exception that the guide flanges I69 of the bolster I02 are shown with spaced beveled plane surfaces I64 cooperative with opposed beveled plane surfaces I05 formed on the column guides of the truck frame. This cooperative relationship of the surfaces of the bolster and column guides prevent the guide flanges of the bolster gouging into the associated surface of the column during vertical reciprocation of the bolster when the bolster is out of squared relation with the side frames and one of the pairs of opposed surfaces are in engaged position.

It may be noted that the spaced guide flanges 24 project outwardly on the bolster on each side of the side frame columns 8 and cooperate therewith to interlock the bolster and side frame in the assembly of the truck, and also that the outboard flanges 24 are of limited height so that the bolster may be elevated in the widened upper portion of the bolster opening and removed therefrom without disturbing the supporting spring group.

In the assembly of the truck, the springs 68, G8 are positioned within the friction shoes 36, 36, and the shoes and springs can be entered within respective pockets 34, "34, each of the friction shoes being urged into the associated pocket until a bar is positioned within the slot 16 by means of which bar the friction shoe may be withdrawn 1 from the bolster opening into the pocket 34. The plates 84, 84 are then positioned in each of the pockets 18, 18 and held therein while the bolster is inserted into the bolster openings of the side frames and positioned upon the supporting coil springs 26, 28. Thereafter the bars may be withdrawn from the slots I6, 16 so that the shoes will be urged into engagement with the surfaces of the plates.

Thus, it will be apparent that I have designed a friction and stabilizing device comprising a friction plate or aligner disposed between members of a railway car truck, said plate having a spherically curved surface in engagement with a corresponding surface of one of the members and a vertical friction surface in engagement with a corresponding surface of another member of the truck. 1

Matter shown and described but not claimed herein is claimed in application Serial No. 436,- 731, of David M. Light, hereinbefore referred to.

It is to be understood that I do not wish to be limited by the exact embodiment of the device shown, which is merely by way of illustration and not limitation, as various and other forms of the device will, of course, be apparent to those skilled in the art without departing from the spirit of my invention or the scope of the claims.

I claim:

1. In a railway car truck, a side frame comprising spaced columns integral with a compression member and a tension member and forming therewith a bolster opening having a widened upper portion, spring means on said tension member in said opening, a bolster seated on said means and comprising a pocket in each side thereof, a friction shoe movably mounted in each of said pockets, resilient means engaging a wall of said pocket and said shoe for urging said shoe toward an adjacent column, plates disposed between said shoes and said columns, each of said plates having a vertical friction surface and a spherically curved surface on opposite sides thereof in engagement with a corresponding surface on an associated column and shoe, and integral interlocking means on the bolster cooperating with complementary means on the columns to afford an interlock therewith, said bolster interlocking means being of less depth than the widened upper portion of the bolster opening whereby the bolster may be elevated therein and removed therefrom during a quick wheel change.

2. In a railway car truck, a side frame comprising a compression member, inclined tension members merging with said compression member adjacent the ends thereof, a lower horizontal tension member intermediate said inclined tension members, spaced columns integral with said compression member and said lower tension member and forming therewith a bolster opening, resilient means supported on said lower tension member in said opening, a bolster seated on said resilient means, said bolster having spaced beveled guide surfaces on opposite sides thereof adjacent opposed corresponding surfaces on said columns for engagement therewith, friction shoes movably mounted in opposite sides of said bolster adjacent said columns, resilient means for urging said shoes outwardly of said bolster, plates interposed between said shoes and said columns, each of said plates having a spherical surface and a vertical friction surface on opposite sides 6 thereof in engagement with respective corresponding surfaces on the associated shoe and column.

3. In a railway car truck, a side frame comprising a compression member, inclined tension members merging with said compression member adjacent the ends thereof, a lower horizontal tension member intermediate said inclined tension members, spaced columns integral with said compression member and said lower tension member and forming therewith a bolster opening, resilient means supported on said lower tension member in said opening, a bolster seated on said resilient means, said bolster having spaced beveled guide surfaces on opposite sides thereof adjacent opposed corresponding surfaces on said columns for engagement therewith, friction shoes movably mounted in opposite sides of said bolster adjacent said columns, resilient means for urging said shoes outwardly of said bolster, plates interposed between said shoes and said columns, each of said plates having a vertical friction surface engaging a corresponding surf-ace on the associated shoe and a vertical and convexly curved surface engaging a correspondingly curved surface on the associated column.

4. In a railway car truck, a side frame comprising columns partly defining a bolster opening having a widened upper portion, a bolster extending into said opening and comprising pockets on opposite sides thereof, spring means on said side frame supporting said bolster, a friction shoe in each of said pockets, resilient means disposed between said shoes for urging each shoe toward an adjacent column, plates interposed between said shoes and said column-s, each of said plates having a vertical friction surface engaging a corresponding surface on the associated shoe and a vertically and convexly curved surface engaging a correspondingly curved surface on an associated column, and integral interlocking means on the bolster cooperating with complementary means on the columns to afford an interlock therewith, said bolster interlocking means being of less depth than the widened upper portion of the bolster opening whereby the bolster may be elevated therein and removed therefrom during a quick wheel change.

5. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, a bolster resiliently supported from said frame in said opening and comprising a pocket in each side thereof having a horizontal wall and spaced friction surfaces, said surfaces sloping in the direction of an adjacent column, a friction shoe movably mounted in each of said pockets and comprising a horizontal wall spaced from said first-mentioned wall and friction surfaces in engagement with said first-mentioned surfaces, a resilient member extending between said spaced friction surfaces and positioned at opposite ends thereof against respective horizontal walls, and plates disposed between said shoes and said columns, each of said plates having coinplementary spherical engagement with the associated column and vertical frictional engagement with the associated shoe.

6. In a railway car truck, a side frame comprising a compression member, inclined tension members merging with said compression member adjacent the ends thereof, a lower horizontal tension member intermediate said inclined tension members and merging thereinto at its opposite.

ends, spaced columns integral with said compres- 7 forming :therewith a :gbolster..-,opening ;having.;;a widenedupper: portion, 1saida columnscomprrsmg webs on opposite sides of said bolster having spherically curved surfaces adjacentv the sides of said :bolster; resilient means supported on said lowertension .member,; a bolster seated thereon betweenjsaid webs, plates. disposed between said webs and. the sides .ofxsaid bolster, .eachjof. said plates-having a vertical-friction surfaceenga a corresponding surface: movable with ,the associated: sideof the bolsterand a spherically curved surfaceengaging the curved surface; ofzthe. asso.-. ciat-ed- ,web, andinterlocking means onsaid .bo1-. ster cooperating with .complementaryzmeans .on'

the columns to afford an interlock therewith, said 1 bolster. interlocking meansbeing of less. depth; than-the widenedv upperportion of said bolster opening .wherebysaid .bolster may. be elevated therein; and. removed .therefromduring a quick. wheel change;

7. In a railway car. truck, a side frame comandsaid columns in engagement with said shoes and movable thereby horizontally in opposite-directionstoward said .columns for engagement therewith; by pressure received from said shoes under theinfluence of. said resilient means, each of said elements having vertical frictional vengagement with one of'said surfaces for damping oscillations of said spring means and complementary spherical engagement with the otherof said surfaces for: enabling movement ofsaid columns to take place about the center of' curvature of saidsurfacesin response, to. tilting of said columns relative to said bolster.

8. In a railwaycar truck, a side frame comprising'spaced columnspartlydefinin a bolster opening, resilient means. on said frame in said openin ;:a bolstersupported'on: said means'and com-.. prising a pocket inv each side thereof, spaced friction surfaces in eachpocket sloping in the direction of anv adjacent column, --,a friction .shoe in-engagement with said surfacesa :resilient member extending between said shoe and the top wall of said pocket urging said shoe toward anassociated column, and plates disposed between, opposed faces of said shoes and said columns,v each of said plates having complementary spherical engagement with one of said facesand vertical frictional engagement with the other of said faces.

9. In a railway car truck, a side frame comprising spaced columns partly defining abolster' opening, a bolster resiliently supported in said bolster opening, and plates interposed between said bolster and columns, each of said plateshaving a vertical friction surface slidably engaging a corresponding friction surface on the associated side of said bolster-and a spherically curved surface engaging a corresponding concentric spherical surface on the associated columnlfor enabling movement of said columns to take. place about the center of curvature-of said spherical surfaces, and interlocking means'onsaid bolster cooperat ing withcomplementary means on said-columns for maintaining-said side. frame and bolster in assembled relationship.

10. In a railway cartruck; a side frame comprising xtension v:and compression" members'-and spacedcolumns defining therewith a bOISbGI'DDQfhir ing-,:resi li,ent,means onsaid tension member-mp.-

said opening, a bolster seated thereon. and come prisingpocketsin opposite sides thereof "adjacent: said; columns, aqfriction shoe in eachof said pockets, resilient'means under compression -be-.-- tween ;said shoe and a wall of said pocket for.- r urgingsaid shoe toward an adjacent column, and; plates; interposed between said shoes: and said... columns inengagement with said shoesand movable... thereby horizontally in opposite-directions toward said columns for engagement therewith;

by. pressure received from said shoes'qunder; the

curved surfaces.

1l;iIn,a railway car truck, a side frame come prising; spaced columns having facingspherical. surfaces, a bolster supported betweensaid columns adjacent said surfaces, a frictionlshoe mov-n ably mounted inv opposite sides of said; bolster,

resilientxmeansdisposed between said. shoes and saidbolster for urging said shoes toward an ad jacent column,v and plates engagingfrictionsurfaces on said shoes and the spherical surfaces of said columns, each of said plates having a vertical frictionsurface slidably engaging a complementary'surface on the associated shoe and a surfaceyhaving a projecting and convexly curved edges'portion engaging the spherical surface on theassociated column, and interlockingmeans on-said .bolster cooperating with complementary meanson said columns for maintaining said side frameand bolster in assembled relationship.-

12., In a railway car truck, a side frame com prisingspaced .columns, a bolster supported between said columns and comprising pockets in opposite sides thereof, a friction shoe movably mounted in each pocket, resilient means housed in.said.pockets-:urging'each of said shoes toward anadjacent-column, and plates interposed between said. shoes and said columns in engagement with said shoes and movable thereby hori-- zontally in opposite directions toward said columns for engagement therewith by pressure receivedrfrom said shoes under the influence of said resilient means, each of said plates having a vertical surface in frictional engagement with r a corresponding surface'on an associatedshoe and-an. outer spherical surface concentric with a corresponding inner surface on an associated column each of said plates extending downwardly below said bolster in the normal positionof said bolster;

13. ."In' a railway car truck, a side frame comprising spaced columns partly defining a bolster opening, sprin means on said frame, a bolster supported on said means in said opening, and

snubbingmeans interposed between said columns on said bolster cooperating withcomplementary" means on said columns for maintaining said side frame and bolster in assembled relationship.

14. In a railway car truck, a side frame comprising spaced columns partly defining a bolster opening, a bolster resiliently supported from said frame in said opening, friction shoes movably mounted in opposite sides of said bolster, resilient means engaging said bolster and shoes for urging said shoes toward an adjacent column, and friction elements interposed between the surfaces of said columns and said shoes in engagement with said shoes and movable thereby horizontally in opposite directions toward said columns for engagement therewith by pressure received from said shoes under the influence of said resilient means, each of said elements having complementary spherical engagement with the surface of the associated column and vertical frictional engagement with the surface of the associated shoe.

15. In a railway car truck, a side frame comprising spaced columns partly definin a bolster opening, a bolster resiliently supported in said opening, friction shoes movably mounted in opposite sides of said bolster, resilient means disposed between said shoes and said bolster for urging said shoes toward an adjacent column, and plates interposed between said shoes and said columns in engagement with said shoes and movable thereby horizontally in opposite directions toward said columns for engagement therewith by pressure received from said shoes under the influence of said resilient means, each of said plates having a vertical frictional surface engaging a complementary surface on the associated shoe and a vertically and convexly curved outer surface engaging a correspondingly curved inner surface On the associated column for enabling movement of said columns relative to said bolster about the center of curvature of said curved surfaces.

16. In a railway car truck, a side frame comprising spaced columns, a bolster resiliently supported between said columns and comprising a pocket in opposite sides thereof, a friction shoe movably mounted in each of said pockets, resilient means housed in said pockets urging said shoes toward an adjacent column, plates interposed between said shoes and said columns, each of said plates having a vertical friction surface slidably engaging a corresponding surface of an associated shoe and an outer surface having a spherically curved peripheral edge portion engaging a correspondingly curved inner surface of an associated column, and interlocking means on said bolster cooperating with complementary means on said columns for maintaining said side frame and bolster in assembled relationship.

1'7. In a railway car truck, aside frame comprising compression and tension members and spaced columns integral with said members and defining a bolster opening, spring means on said frame, a bolster supported on said means in said opening, and snubbing means interposed between said columns and the sides of said bolster forprising spaced columns partly defining a bolster opening, a bolster resiliently supported from said frame in said opening, friction shoes movably mounted in opposite sides of said bolster, resilient means urgin said shoes toward adjacent columns, and friction elements interposed between the surfaces of said shoes and said columns in engagement with said shoes and movable thereby horizontally in opposite directions toward said columns for engagement therewith by pressure received from said shoes under the influence of said resilient means, each of said elements having complementary spherical engagement with one of said surfaces and vertical frictional engagement with the other of said surfaces.

19. In a railway car truck, a side frame comprising spaced columns, a bolster supported between said columns, friction shoes movably mounted in opposite sides of said bolster, resilient means carried in each of said sides for urging each of said shoes toward an adjacent column, and plates interposed between said shoes and said columns in engagement with said shoes and movable thereby horizontall in opposite directions toward said columns for engagement therewith by pressure received from said shoes under the influence of said resilient means, each of said plates having a spherical surface and a vertical friction surface on opposite sides thereof engaging respective corresponding surfaces on the associated shoe and column.

20. In arailway car truck, a side frame comprising compression and tension members and spaced columns merging therewith defining a bolster opening, a bolster resiliently supported on said tension member in said opening, friction shoes pocketed in opposite sides of said bolster, resilient means urging said shoes toward said columns, pockets in said columns adjacent said shoes and spaced from said members, and a pair of friction elements in said Pockets, each of said elements having a friction surface in engagement with the associated shoe and a spherical surface in engagement with a corresponding surface in the associate pocket, said elements being movable horizontally in opposite directions and held within the associated pockets by the shoes under the influence of said resilient means.

21. In a railway car truck, a side frame comprising compression and tension members and spaced columns merging therewith defining a bolster opening, a bolster resiliently supported on said tension member in said opening, a friction shoe movably mounted in each side of said bolster adjacent each column, a plate disposed between each shoe and the adjacent column, each of said plates having a friction surface on one side thereof and a spherical surface on the other side thereof, and resilient means operative to urge each shoe into engagement with the friction surface on the associated plate and the spherical surface of the associated plate into engagement with a corresponding surface on the associated column.

22. In a railway car truck, a side frame comprising compression and tension members and spaced columns merging therewith defining a bolster opening, a bolster resiliently supported on said tension member in said opening, a friction shoe movably mounted in each side of said bolster adjacent each column, a plate disposed between each shoe and the adjacent column, each of said plates, having a friction surface on one side thereof and a spherical surface on the other side thereof, resilient means operative to urge each shoe into engagement with the friction surface on the associated plate and the spherical surface of the associated plate into engagement with a corresponding surface on the associated column, and interlocking means on said bolster cooperating with complementary means on said columns for-maintaining said side frame and bolster in assembled relationship.

23. In a railway car truck, a side frame comprising compression and tension members and spaced columns merging therewith definin a bolster opening, a bolster resiliently supported on said tension member in said opening, a frictionshoe movably mounted in each side of said bolster adjacent each column, resilient means urging said shoes toward said columns, and a friction element between each shoe and the adjacent column in engagement with said shoe, the pressure of said shoes under the influence of said resilient means urging each element laterally of said bolster into engagement with the associated column, each of said elements having a spherical surface and a vertical surface on opposite sides thereof engaging corresponding surfaces on the associated column and shoe.

24. In a railway car truck, a side frame comprising compression and tension members and spaced columns merging therewith defining a bolster opening, a bolster resiliently sup-ported on said tension member in said opening, a friction shoe movably mounted in each side -of'said bolster adjacent each column, resilient "means urging said shoes toward said columns, a friction element between each shoe and the adjacent column in engagement with said shoe, the pres- 25. In a railway car truck, a side frame comprising compression and tension members and spaced columns mergin therewith defining a bolster opening, a bolster resiliently supported on said tension member in said opening, a friction shoe movably mounted in each side of said bolster adjacent each column, resilient means urging said shoes toward said columns, and a friction element between each shoe and the adjacent column in engagement with said shoe, the pressure of said shoes under the influence of said resilient means urging each element laterally of said bolster into engagement with the associated column, each of said elements having a friction surface in engagement with the associated shoe for snubbing vertical oscillations of said bolster and a spherical surface in engagement with a complementary surface on the associated column for permitting movement of said columns relative to said bolster about the center of curvature of said spherical surfaces.

26. In a railway car truck, a frame member having an opening therein, a relatively movable member within said opening, opposed pockets in the adjacent sides of said members, friction other 'of said members, each of said elements having friction and spherical surfaces on opposite "sides thereof, and resilient means operative to 12 urge said friction means horizontally in opposite directions 'into engagement with the friction surfaces -ofthe adjacent elements and thereby the spherical surfaces of the latter into engagement with corresponding surfaces on the associated member.

27, In a railway car truck, a frame having a column member, a relatively movable member adjacent said column member, friction means carried by one of said members, and an element in engagement with the other of said members, said element having a friction surface on one side thereof in engagement with said friction means and a spherical surface on the opposite side thereof, and resilient means acting in a horizontal plane and operative to urge said friction means and said element into said engagement with each other and the spherical surface of the latter into complementary engagement with its associated member.

28-. In a railway car truck, a frame member having an opening therein, a relatively movable member within said opening, friction means movably mounted in one of said members, elements carried by the other of said members adjacent respective friction means, each of said elements having spherical and friction surfaces on opposite sides thereof, and resilient means operative to urge said friction means into engagement with the friction surfaces on said elements and the spherical surfaces of the latter into engagement with its associated member, said friction means and elements being relatively movable in response to movement of said relativelymovable member whereby friction is de veloped for snubbing said movement.

29. In a railway car truck, a frame having spaced columns, a relatively movable member between said columns, and snubbing means interposed between said columns and the sides of said member for generating friction therebetween, said snubbing means comprising elements each having friction and spherical surfaces on opposite sides thereof engaging corresponding surfaces on the associated column and associated side of the member, and resilient means acting in a horizontal plane and operative to urge said elements in-opposite directions into said engage- 'ments. 50

.30. In a railway car truck, a frame member having an opening therein, a relatively movable member in said opening, snubbing means between the adjacent sides of said members for generating friction therebetween, said snubbing 'me'ans comprising friction means movably carried'by said-members including friction elements carried by one of said members and having spherical surfaces in complementary engagement therewith and frictional engagement with the friction means of the other of said members, and resilient means carried by said last-mentioned member and operatively urging said elements into-said engagements under substantially uniform pressure.

31. In a railway car truck, a frame member having an'opening therein, a relatively movable member in said opening, and snubbing means carried by'one of said members for frictional engagement with the other of said members, said snubbing means comprising friction means and resilient means operatively associated therewith and acting in a horizontal plane for urging the same toward the other member, and means interposed between said-otherimember and said friction means in spherical engagement with the former and frictional engagement with the latter.

RUSSELL C. TAYLOR.

REFERENCES CITED The following references are of record in the file of this patent:

Number Number Name Date Trombridge Feb. 29, 1916 Filander et a1 Feb. 4, 1930 Hedgcock June 15, 1937 Goodwin June 22, 1937 Hobson Aug. 31, 1937 Barrows Oct. 11, 1938 Webb Jan. 3, 1939 Duryea May 23, 1939 FOREIGN PATENTS Country Date Sweden Dec. 24, 1935

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