US2539607A - Railway truck - Google Patents

Description

Jan; 30, 1951 E. H. BLATTNER ETAL 2,539,607

RAILWAY TRUCK 4 v Filed Jan..15, 1945 2 Sheets-Sheet 1 29 2 l2 24 34m u 24,

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7 FAI Jan. 30, 1951 v E. H. BLATTNER ETAL 2,539,607

7 RAILWAY TRUCK Filed Jan. 15, 1945 2 Sheets-Sheet 2 00 Kit-N. PL

EM/L H. BLflTTA/Ek GLENN F. Col/6H Patented Jan. 30, 1951 UNITED STATES PATENT OFFICE N. Y., assignors to The Symington-Gould Corporation, Depew, N. Y., a corporation of Maryland Application January 15, 1945, Serial :No. 572,895

30 Claims. -1

This invention pertains to a railway truck and more particularly to amounting for a movable member thereof.

An object of the invention is the provision, in a railway truck, of a side frame and member arranged for relative, vertical and'transverse movements with such movements both controlled by friction means.

Another object of the invention is the provision, in a railway car truck, of a side frame, arranged through spring means, to move vertically relative to a journal box .and the journal box arranged through spring means tomove transversely relative to the side frame.

A still further object of the invention is the provision, in a railway truck, of a friction means capable of engaging a side frame to control actions of side frame supporting springs and also capable of engaging a journal box to control a transverse movement of the journal box.

The above and numerous other objects will become apparent from a reading of the succeeding description, considered together with the accompanying drawings, the latter of which disclose a form of the present invention, and wherein:

Figure 1 is a partial sideelevational and partial vertical sectional view of a portion of a'railway truck, embodying the present invention.

Figure 2 is a partial plan and partial horizontal sectional view taken along the lines 22 of Figure 1, looking in the direction of the arrows.

Figure 3 is a transverse vertical sectional view taken along the lines 33 of Figure 1 and looking in the direction of the arrows.

Figures 4, 5 and 6 are perspective views of components of the truck, fully hereinafter described in detail.

Referring now in detail to the drawings wherein, throughout the several views, like numerals refer to like parts, the reference character I .is employed to designate, in a somewhat general manner, a ra lway car truck, only a portion of which is illustrated. Making up transversely spaced, longitudinally extending, load carrying members of the truck is a pair of counterpart side ally spaced flanges i'i 'depending fromadiaoent pression member in the side frame is a lower or tension member 6 having a tranverse web 1 with downstanding lateral flanges 8 to also beof channel form and opening downwardly of the side frame. The tension member is inclined upwardly and outwardly towards a related extremity of the side frame where it merges with the compression member, and the two members in effect continue as-a unitto present a housing forming side frame extremity 9. The .housing is somewhat bulged or extended inwardly and outwardly of the truck beyond the transverse limits of the remaining portions of the compression and tension members for the accommodation of related structure, hereinafter described in detail. The housing at each end of the side frame desirably comprises longitudinally spaced jaws or columns formed by end walls 10 which extend vertically and transversely of the truck to :have their transverse edges merge with inboard or inner and outboard or outer flanges -or sidewalls H. The sidewalls extend from the end walls toward one another to define a space or an opening !2 therebetween.

Extending horizontally through the housing intermediate its height is a top wall l3 which is formed integrally with the side walls and terminates in the end walls to substantially define the upper limits of the opening I 2. Accordingly, the related jaws or columns at each end of the side frame thus formed, open toward one'another and. downwardly-of the truck.

Disposed within the opening I2 between the horizontal or longitudinal limits of the jaws or columns :is a journal box 14 forming a container or casing for an extremity of .a wheel and axle assembly and a suitable bearing, none of which is illustrated because they are of standard design and their construction will be clearly understood by those skilled in the art. It may, however, be well to state that the journal box illustrated may be recognized as one designed for a friction bearingybut if desired, a roller or anti-friction bearing maybe associated with the wheel and axle as vsembly and, accordingly, the design of the journal box in the latter case will be such as'to accommodate the roller or anti-friction hearing. The

journal box is desirably "provided with shelves,

, wings or ledges .15 which extend longitudinally of the truck or horizontally from the sides of the journal box, preferably adjacent to a horizontal plane ,fbisecting the axis of the wheel and axle assembly. The shelves or wings, reinforced by ribslivlfi. underlying and formed integral Witll: th

journal :boxand wings, extend :into related i -J-'aw-s or columns, but among other reasons which will become hereinafter apparent, are spaced inwardly away from the jaw forming components so as to permit, insofar as the wings are concerned, an unrestricted, predetermined service movement of the side frame and journal box.

Resilient means is interposed between the journal box and side frame to form a yieldable support for the side frame and thus cushion ex- 7 ternal impulses to which the wheel and axle assembly and journal box are subjected in service. This yieldable support allows the side frame to move vertically relative to'the journal box. If one type of spring is employed as a mounting to resiliently support the side frame from the journal box and thus present a flexible connection between the side frame and journal box, this type of spring, if of the same characteristics, will have a substantially uni orm period of vibration. Accordingly, at certain speeds of a railway car truck, and upon passage of the wheels thereof over rail joints or other irregularities such as periodically appear in the tracks. shocks or external impulses hereinabove referred to will be transmitted through the journal box to the spring means. These external impulses app aring at regular intervals, will synchronize with the vibrations of the side frame resilient support. As will be appreciated, this synchronization of external impulses and spring vibrations will, if undisturbed, cause an amplification of the spring vibrations. and tend to force the s rin s solid during a compressive movement thereof and, upon recoil, tend to ex and the springs beyond their normal heights. Further, this detrimental excessive spring travel, if permitted to continue, will surely and eventually result in irreparable damage to the lading within the car bod carried by the truck, may eventually result in the derailment of the truck and in damage to the springs themselves as well as the truck.

An arrang ment has been incorporated in the embodiment of the present invention to check, disturb or control the vibrations of the side frame supporting springs and this arrangement, considered generally, is formed by resilient means coil s rings are disposed vertically between the side frame and .iournal box and ext nd into a jaw or column adjacent each side of the journal box in s bstantiaL'vertical alignment with a subjacent shelf or ledge. Each coil spring has an upper extremity bearing a ainst a downwardly facing spring rest 19 formed on the compression member web. Longitudinally spaced ribs or lugs 29 overlie, in telesco ing relation, the upper ex- An exemplificatremities of the springs, so as to maintain the latter in a predetermined or fixed position. Each coil spring extends from a compression member springs of such a lengththat they. extend from the rests formed on the compression member through the plane of the top wall to a position short of the journal box shelves, a long travel spring means is incorporated in the truck to present an easy, smooth riding truck capable of performing in high speed service. As will be clearly understood, the coil springs may, if short travel springs are desired, be shortened as compared with those illustrated, so that their upper extremities bear against a suitable rest formed Onthe top wall which, in such instance, will eliminate the openings 2|. In the event of the use of short travel springs the truck may still be adaptable for high speed service since the spring travel removed from the side framejournal box connection may appear in the side frame-bolster connection. The theme of the short travel spring construction just described is reflected in United States Patent No. 2,180,933, granted November 21, 1939, to D. S. Barrows.

Disposed below and in supporting relation with each. outer coil spring is a spring plate or seat '22 formed by a base plate 23 having transversely spaced, side arms 24 connecting longitudinally spaced inner and outer end arms 25 and 26, re-

shoe or block 2! is positioned within each column in supporting relation with the overlying spring plate, with each shoe desirably comprising a web 28 extending substantially horizontally and disposed intermediate the height of the shoe.

Extending vertically above and below the shoe web adjacent one edge thereof is a flange or bear-' with a wear plate 3! facing inwardly of the jaw and having an exposed surface 32 in constant and intimate contact with the complementary surface 30 of the column bearing plate. cordingly, as the coil springs are flexed in service,

frictional forces are created 'on the contiguous surfaces 38 and 32 to check, control, snub or dampen the vibrations of the coil springs. The shoe bearing plate above the web thereof is provided with an upwardly facing relief or recess 33 into which extends a convolution or shoulder 34 outstanding from the spring plate outer end arm 26 to present an interlock between the spring plate and shoe as well as a bearing surface between the outer end arm and bearing plate as indicated by the reference character 3-5. Forming continuations of each shoe bearing plate are transversely spaced, upstanding side walls 35 which are in substantial vertical alignment with the related spring plate side arms to underlie the spring plate in supporting relation thereto. As will be noted, any load transmitted to the outer coil springs will be carried directly to the shoes through the medium of the spring plates. As indicated, the side walls of each shoe are also; spaced a slight distance inwardly of the jaw from related inner and outer column flanges to per mit, so far as this immediate structure is con-' cerned, a substantially free, vertical or service movement of the shoe. Wear plates 36a are secured by any desired means to the jaw inner and outer flanges to relieve the side flanges of any wear which might occur in service. The slight clearance between each wear plate-36a and related shoe and spring plate is, of course, determinative of the permissible transverse movement of the shoe and spring plate and which is preferably negligible.

As previously indicated, the shoes are urged constantly longitudinally of the side frame away from the journal box to be in frictional engagement or intimate contact with the jaw or column end wall wear plates. Various means may be employed to perform this function but the preferred means are resilient elements 3';

which act in series with the inner and outer coil.

springs and, accordingly, also function as load carrying flexible means but having characteristics different from those of the coil springs.

Each resilient element, disposed between a related shoe web and subjacent journal box ledge, preferably comprises a series or plurality of sandwiched pads 33, the latter of which may be formed of rubber, a rubber compound or any deformable or resilient material, and are bonded or otherwise attached to an intermediate or interposed spacer plate 39. While only two rub-- ber pads and a single spacer plate are illustrated as comprising each resilient element, it will be understood clearly that this showing is merely illustrative and not to be construed as a limitation. Forming the vertical extremities of each resilient element is an upper or top end block or end disc .48 and a bottom or. lower end block or end disc 4| both of which also have the adjacent pads bonded or otherwise attached thereto so that in efiect the pads, spacer plate and both end discs of each resilient element form an integral, unitary component. The up,- per .end disc is disposed within a suitable accommodating downwardly facing recess 42 formed in the shoe web and has .a leading edge 43 thereof in surface bearing relation or engagement with an inwardly facing shoulder M formed on the shoe. In like manner, each journal box ledge is formed with an upwardly facing .cavity of such dimensions as to neatly ac,- commodate a related lower end disc while in this instance a trailing edge 45 of each lower end disc abuts a shoulder is formed on the journal box and defining the inner limits of the ledge cavity. When a resilient element is removed from the related components of a railway car truck the end discs, pads and spacer plate, while superimposed one upon another, present a marked and distinct stepped arrangement with the entire arrangement appearing as leaning toward one direction. In this marked, stepped arrangement, the leading edge of the upper end disc is farthest extended and thus overhangs the subiacent components, while the trailing edge of the lower end disc is clearly out of vertical alignment with the corresponding edge of the upper end disc. With the components of each resilient element being disposed in this preassembly relationship, the resilient element is associated with the journal box shelf and shoe so that, as illustrated in section in Figure 1 of the drawings, the components approach a vertical alignment or disposition. The com.- anee s c t e ien nt need n o course, necessarily be arranged as above (16'? scribed because, as will be quite clear, the com ponents may, before assembly, assume the near vertical alignment as illustrated in Figure l, and when assembled with a journal box and shoe, assume a marked and distinct stepped arra m nt a pr ious e cri ed, s S n element distorted hori onta ly zontal plane included angles greater than the from its normal position when applied to a rail way car truck. By employing either of the: optional arrangements, the pads are placed horizontal shear and, because of the engagesment of the upper disc and related shoulder' and of the lower disc and related shoulder, the forces thus built up in the pads cause each shoe to be urged constantly and horizontally away from the journal box against the column or jaw.-

' I i r P a e 3L The journal box is arranged to shift or move: transversely of the truck so that, as the jour. nal box is urged transversely in response to ex.-' tennal, lateral impulses caused by irregularities in the rails, road-bed or when the flanges of' deemed suificient to control such journal box transverse movement, the journal box is provided with a rear dust guard well Al that ex? tends longitudinally of the truck to overlie, in spaced relation, the jaw or inner flanges to thereby limit such transverse movement out.- wardly of the truck. In like manner, a lug .48 outstands from each side of the journal box out.- wardly of the side frame in spaced relation to the related jaw or column outer flange to limit the transverse movement of the journal box in? wardly of the truck.

While the horizontal and transverse shear stresses to which the pads are subjected, are increased as the journal box moves transversely of the truck farther away from its normal or illustrated position, and these forces, as previously stated, are believed sufficient to control the journal box transverse movement, an added or equally or more positive control is in: corporated in the illustrated structure. As illustrative of such an added conrol, the web of each shoe is provided with a series or pair of inclined surfaces 49 sloping longitudinally of the truck in such a direction as to raise in height as they move away from the journal box. In other words, the inclined surfaces are disposed so as to be directed downwardly toward the journal box with the two inclined surfaces of each shoe web being arranged desirably parallel with one another and presenting with a horiangles of repose. This particnlar. disposition of the inclined surfaces is preferred. However, this surface disposition is not to be construed as a limitation because the above described in:

correspond to, ride upon or be in bearing relation with the underlying shoe surfaces .49. Thus. y r s -O he arti u ar d s os n .Q the inclined surfaces, the wedges are adapted to move horizontally toward the journal box."

Each sloping surface 45 and 5| is of V-configuration and thus an interlock is presented be: tween the shoes and wedges so that there will be no relative movement therebetween transse f e at "a height to. deer.

be spaced below the spring plate, has a vertical outer face 52 bearing constantly against an outwardly disposed surface 53 of a. wear plate 54. The wear plate just mentioned is deposited in an accommodating recess in the side of the journal box and locked therein by any method or means. Accordingly, any transverse movement of the journal box will, by reason of the shoes and wedges having their transverse movements arrested by the jaw or column side flanges, cause the journal box wear plates to rub or wipe across the wedges to create frictional forces tending to control, snub or check the such transverse movement. The presence of the inclined surfaces will also tend to urge the shoes away from the journal box to augment the forces created by the horizontally distorted or displaced rubber pads. or compressive or expansive movements of the resilient elements or rubber pads, the wedge faces 52 will wipe vertically across the journal box bearing plate surfaces 53 to create additional frictional forces to check the vibrations of the load carrying coil springs. The forces urging the wedges downwardly against the shoes and inwardly toward the journal box are supplied preferably by the inner coil springs only so that a relatively light or soft brushing or wiping action will be effected at the journal box-wedge juncture because it is believed that the transverse snubbing forces need not be intense. To effect a juncture of each inner coil, and subjacent wedge, each base plate 23 is provided with an aperture or opening 55 through which a,

related inner coil extends to have its lower extremity bear directly against or upon a wedge.

It is desired in structures of this nature to prevent or minimize as much as possible an action or movement of the journal box relative to the side frame in a direction longitudinally of the latter to thereby maintain the wheel and axle assemblies at a predetermined spaced or parallel relation. In usual or ordinary structures wherein provisions are made for a vertical and transverse relative movement this last mentioned desirable condition is not attained because sufficient' clearance must be provided between the journal box and side frame to allow for a vertical or transverse movement or both, otherwise the journal box will bind within the side frame. This mentioned clearance which must be present allows the journal box, at least to the extent of the clearance, to move in a direction longitudinally of the side frame. In the present structure it will be noted that no movement of the journal box in a direction longitudinally of the side frame is permitted due to the particular arrangement and disposition of the shoes and wedges. If, however, under certain operating conditions the forces developed are of sufficient magnitude to urge the journal box longitudinally of the side frame then, in that Also, because of the slight vertical flexing event, this movement will be resisted by the 7 invention and scope of the appended claims.

We claim:

1. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical and transverse movements, the combination of, load carrying spring means disposed between said side frame and load carrying member, means associated with said load carrying member for resisting said transverse movement, and horizontally spreadable friction means urged by said spring means and means and arranged to constantly frictionally engage said side frame and load carrying member for controlling both of said movements.

2. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical and transverse movements, the combination of, load carrying spring means disposed between said side frame and load carrying member, movable means associated with said load carrying member for resisting said transverse movement, and multi-part friction means urged by said spring means and movable means and arranged to constantly frictionally engage said side frame andload carrying member for controlling both of said movements.

3. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical movement, the combination of, load carrying spring means disposed between said side frame and load carrying member, fric tion means engaged by one end of said spring means for frictionally engaging said side frame during said vertical movement; said ,frio tion means comprising parts acting in opposite horizontal directions, resilient means associated with said member for urging one of said parts in one direction, and means associated with said parts for urging the other of said parts in an opposite direction.

5. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical movement, the combination of, spring means comprising inner and outer coil springs disposed between said side frame and member, means spaced from said spring means and disposed between said side frame and member, a multi-part friction means positioned beween said spring means and means for contacting said side frame and snubbing the action of both coil springs; said inner coil spring acting against one part of said friction means and. said outer coil spring acting against another part of said friction means, said means causing one part of said friction means to be urged in one direction, and means associated with said friction means for urging another part of said friction means in an opposite direction.

6. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical movement, the combination of, load carrying spring means disposed between said side frame and member, rubber means acting in series with said spring means, and friction means between said spring means and rubber means; said friction means comprising one part urged flnto intimate contact with said side frame by said air-caste rubber means and answer part urgedign to intimate ontact with said member by said spring 7, In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical and transverse movements, the combination of, load carrying spring means disposed between said side frame and member, means spaced from and in vertical alignment with said spring means for resisting said transverse movement, and friction means interposed between said spring means and means; said friction means being so arrangedthat one part thereof snubs said vertical movement and another part thereof snubs said transverse movemm. .b V.

8. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical and transverse movements, the combination of, load carrying spring means disposed between said side frame and member, means spaced vertically from and acting in series with said spring means for resisting said transverse movements, and friction means interposed between said spring means and means; said friction means being so arranged that one part thereof engages said side frame for snubbing all of said vertical movements and another part thereof engages said member for snubbing all of said transverse movements. I I

9. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical and transverse movements, the

combination of, load carrying spring means disposed between said side frameand member, resilient means in vertical alignment with said spring means ferresisting said transverse movement, and friction means disposed between said spring means and resilient means for constantly frictionally resisting both of said movements.

10. In a railway car truck wherein a side frame and a load carrying member are arranged for relative vertical and transverse movements, the combination of, load carrying spring means disposed between said side frame and member, resilient means carrying said lead carrying member in series with said spring means for resisting said transverse movement, and friction means disposed between said spring means and resilient means for frictionally resisting both of said movements; said friction means comprising one part urged into intimate contact constantly with said side frame by said resilient means and another part urged into intimate contact constantly with said member by said spring means.

11'. In a railway car truck wherein a side frame and a journal box are arranged for relative vertical and transverse movements, the combination of; load carrying coil spring means interposed between said side frame and journal box, rubber :means interlocked with said journal box, and friction means associated with said coil spring :means and rubber means; said rubber means urging said friction means against said side frame for snubbing said vertical movement, and said coil spring means urging said friction means against said journal box for snubbing said transverse movement.

12. In a railway car truck wherein a side frame and a. journal box are arranged for relative ver- 'tical and transverse movements, the combination of, load carrying coil spring means interposed between said side frame and journal box, rubber means interlocked with said journal box, and friction means associated with said coil spring means and rubber means; said rubber means beingsubjeeted to horizontal shear for urging said friction means against said side frame and forsnubbing said vertical movement, and said coil spring means acting through inclined surfaces for urging said friction means against said journal box for snubbingsaid transverse moveenti i i r 13. In a railway car truck wherein a side frame member and a journal box member are arranged for relative vertical movement, the combination of, rubber means interlocked with said journal box member, friction means comprisinga shoe interlocked with said rubber means and urged horizontally thereby into engagement with one of said members, a wedge associated with said shoe and arranged to move in a direction opposed to themovement of sai-d shoe into engagement with the other of said members, and coil springs acting between said friction means and side frame member. v H

14. In a railway car truck wherein a side frame member and a journalbox member are arranged for relative vertical movement,- the combination of, rubber means interlocked with said journal box member, friction; means comprising 'a shoe interlocked with said rubber means and urged horizontally thereby into engagement with one of said members, a wedge associated with said shoe and arranged to move in a direction opposed to the movement of said shoe into engagement with the other of said members, and coil springs acting between said friction means and side frame member; one of said coil springs bearing upon said shoe and another of said ceil springs bearing upon said wedge H 1-5. In a railway car truck wherein a sideframe member and a journal box member are arranged for relative vertical movement, the combination pf, rubber means interlocked with said journal box member, friction means comprising a shoe interlocked with said rubber means and urged horizontally thereby into engagement with one of said members a wedge associated with said shoe and arranged to move in a direction opposed to the movement ofsaidshoe into engagement with the other of said members, and a double coil spring interposed between said side frame member and friction means, an outer coil of; said coil spring bearing upon said shoe and an inner coil of said-coil spring bearing upon said wedge.

16. In a railway car truck wherein a side frame and a journal box are arranged for relative vertical and transverse movements, the combination of, a series of superimposed rubber pads interlocked with said journal box, a shoe interlocked with said superimposed rubber pads and urged thereby ho-rizontally against said side frame for snubbing said vertical movement, a wedge mounted uponsaid shoeand a-rranged through an inclined surface to be urged against said journal box for snubb ing saidtransverse movement, and coil spring means acting verticall -y against said side frame and said shoeand wedge;

1' 7. In arailway car truck wherein a side frame and a journal box' are arranged for relative vertical and transverse movements, the combination of, a series of superimposed rubber pads inter locked with said journal box, a shoe interlocked with said superimposed rubber pads and urged thereby horizontally against said side frame for snubbing said vertical movement, a wedge mounted upon said shoe and arranged through an inclined surface to be urged against said journal box for snubbing said transverse movement, and

11 coil spring means acting vertically against said side frame and said shoe and wedge; said shoe and wedge being relatively stationary transversely. of said truck.

18. In a railway car truck wherein a side frame and a journal box are arranged for relative vertical and transverse movements, the combination of, rubber means associated with said journal box, a shoe associated with said rubber means and urged thereby horizontally against said side frame for snubbing said vertical movement, a wedge within said shoe and arranged through an inclined surface to be urged against said journal box for snubbing said transverse movement, a spring plate bearing against said shoe, and coil spring means acting vertically against said side frame and said spring plate.

19. In a railway car truck wherein a side frame and a journal box are arranged for relative vertical and transverse movements, the combination of, rubber means associated with said journal box, a shoe associated with said rubber means and urged thereby horizontally against said side frame for snubbing said vertical movement, a wedge within said shoe and arranged through an inclined surface to be urged against said journal box for snubbing said transverse movement, a spring plate interlocked with and bearing against said shoe in spaced relation to said wedge, a coil spring acting between said side frame and spring plate, and a coil spring acting between said side frame and wedge.

20. In a railway car truck wherein a side frame and a journal box are arranged for relative vertical and transverse movements, the combination of, rubber means associated with said journal box, a shoe associated with said rubber means and urged thereby horizontally against said side frame for snubbing said vertical movement, a wedge within said shoe and arranged through an inclined surface to be urged against said journal box for snubbing said transverse movement, a spring plate interlocked with and bearing against said shoe in spaced relation to said wedge, a coil spring acting between said side frame and spring plate, and a coil spring acting between said side frame and wedge; said last named coil spring extending through said sprin plate.

21. In a railway, truck wherein a side frame and member are arranged for relative vertical and transverse movement, the combination of, resilient means interlocked with said member, a shoe interlocked with said resilient means and urged thereby horizontally against said side frame for snubbing said vertical movement, a wedge associated with said shoe and arranged through an inclined surface to be urged against said member for snubbing said transverse movement, coil spring means acting vertically against said side frame and shoe, and coil spring means acting vertically against said side frame and wedge; said wedge and shoe being arranged to frictionally resist movement of said member longitudinally of said side frame.

22. In a set of friction means for use in a railway truck, the combination of, a shoe having a spring seat intermediate its height, an outwardly directed rubbing surface extending vertically above and below said spring seat, an inclined surface sloping in a direction away from said rubbing surface and toward said spring seat, and a wedge arranged to fit within said shoe; said wedge having an inclined surface contactin said first named inclined surface.

23. In a set of friction means for use in a railway truck, the combination of,- a shoe having a downwardly facin spring seat intermediate its height, an outwardly facing rubbing surface extending vertically above and below said spring seat, an inclined surface sloping in a direction away from said rubbing surface and toward said spring seat, a wedge arranged to fit within said shoe; said wedge having an inclined surface contacting said first named inclined surface, and a rubbing surface on said wedge facing away from said first named rubbing surface.

24. In a set of friction means for use in a railway truck, the combination of, a shoe having a rubbing surface extending vertically, an inclined surface sloping in a direction away from said rubbing surface, a wedge within said shoe and engaging said inclined surface, and a plate resting upon and interlocked with said shoe.

25. In a set of friction means for use in a railway truck, the combination of, a shoe having a rubbing surface defining one side thereof, an inclined surface sloping in a direction away from said rubbing surface, a wedge within said shoe and engaging said inclined surface, and a plate resting upon said shoe; said plate having an aperture through which means may extend to engage said wedge,

26. In a set of friction means for use in a railway truck, the combination of, a shoe arranged to fit neatly between column flanges of a side frame and having a recess therein for the accommodation of spring means, a vertically disposed rubbing surface on said shoe arranged to frictionally engage a surface of said truck, an inclined surface on said shoe intermediate the height thereof, and a wedge within the confines of said shoe and having an inclined surface arranged to engage said shoe inclined surface.

27. In a set of friction means for use in a railway truck, the combination of, a shoe arranged to fit neatly between column flanges of a side frame, a vertically disposed rubbing surface on said shoe arranged to frictionally engage a surface of said truck, an inclined surface on said shoe intermediate the height thereof, a Wedge within the vertical limits of said shoe and having an inclined surface arranged to engage said shoe inclined surface, and a plate bearing upon said shoe and being spaced above said wedge.

28. In a set of friction means for use in a railway truck, the combination of, a shoe arranged to fit between column flanges of a side frame and having a recess therein for the accommodation of spring means, a vertically disposed rubbing surface on said shoe arranged to frictionally engage a surface of said truck, an inclined surface on said shoe, a wedge Within the vertical limits of said shoe and having an inclined surface arranged to engage said shoe inclined surface, and

a vertically disposed surface on said wedge substantially parallel to said rubbing surface, said last named vertically disposed surface being arranged to bear against another surface of said truck.

29. In a set of friction means for use in a railway truck, the combination of, a shoe arranged to fit between spaced flanges of said truck, a recess at a bottom of said shoe for the accommodation of spring means, a vertically disposed surface on said shoe arranged to bear against a correspondingly disposed surface of said truck, an inclined surface on sa d shoe, a wedge having an inclined surface arranged to engage said shoe inclined surface, a vertically disposed surface on said Wedge substantially parallel to said first sloping surface arranged to seat with said inclined surface, said inclined and sloping surfaces being arranged to vary the distance between said rubbing and brushing surfaces, and a spring seat associated with said shoe and overlying said wedge.

EMIL H. BLA'ITNER. GLENN F. COUCH.

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

UNITED STATES PATENTS Number Name Date 1 757,841 Bitter Apr. 19, 1904 1,695,456 Drenning Dec. 18, 1928 1,951,547 Goodwin Mar, 20, 1934 2,091,783 Lazna 1 Aug. 3l, 1937 2,2687% Flesch Jan. 6, 1942 2,295,547 Cottrell Sept. 15, 1942

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