Patented Sept. 17, 1946 2,407,875 UNITED STATES PATENT OFFICE` 2,407,875 RAILWAY CAR TRUCK William A. Geiger, Chicago, Ill., assigner to William P. Sidley, M. F. Back, Albert P. Withall, Edwin C. Austin, and George A. Johnson, all of Chicago, Ill., and Alice T. Miner, Chazy, N. Y., as trustees of The William H. Miner Foundation Application July 13, 1944, Serial No. 544,664 7’ Claims. (Cl. 105-197) 1 2 l This invention relates to an improved railway car truck, and particularly to an improved bolster snub-hing means therefor. One of the objects of the inventionv is to pro frame and fo-r other purposes not directly con. cerned with this invention. _ vide `a snub'bing or shock-absorbing means for The bolster opening D is bounded at the top by a top wall I5 and at the bottom by the spring seat C', and at its sides or ends by the vertical walls I6, except at the upper narrower portions the bolster which is adaptable to the side frames of the truck without the necessity of materially which are left open. in accordance with my in changing or enlarging the usual frame and vention for the snub‘bing mechanism, these. walls.` bolster. all being integral with and connecting the two` More specifically, my object is to provide with 10 side wallsl of the frame. in the confines of the Walls of the side frame, The end of the bolster is positioned, between snub-hing or shock-absorbing means which fric the end margins of the upper portionof the. open tionally acts upon the side walls of the bolster ing and is guided thereby for vertical movement` to dampen the vertical movement of the bolster in the frame. The bolster is provided with guide in> the frames. 15 lugs ll `Winch embrace the outside. of< the` sidev Other' objects of the invention will appear from wallsY of the frame to prevent endwise movement the following description and claims in connec of the bolster. The lower portion of the opening tion with the accompanying, drawing. is wider so that in assembling, the bolster can Referring to the drawing, ' Ibe inserted endwise into the opening and',th_en Fig. 1 is a vertical outer face view of the cen 20 raised up into position. This portion of the open tral portion of one side of a railway cai` truck ing also provides space for the bolster supporting showing the associated side~ frame, bolster and springs C. As is well known in the art, the spring cluster; and illustrating my improved springs C aregenerally in the form of coil springs, a plurality of which are arranged in a nest, or snubbing means in connection therewith ;` Fig. 2 is a horizontal section on the line 2-2 25 cluster and positioned between the bolster and the spring seat C', thus providing a yielding sup' of Fie'. 1;‘ Y port for the bolster. Fig. 3'i`s a view similar> to Fig: l, illustrating a The bolster end portions are generally rectan «modified form of snubbing mechanism; Fig. 4 is a horizontal' section on line 4_4 of gular in section and are formed as hollow castings Fig. 3; and 30 having horizontal top and bottom walls I8 and verticalv side walls I9 which lie adjacent the mar’ Fig. 5 is a View similar to Fig. 1, illustrating gins of the bolster openings and which, in accord still another modiñcation of snub-hing mechaance with my invention, provide friction faces nisrn. upon which the snubbing mechanism acts. In the drawing, A indicates one of the sidíe In the structure shown in Figs. l and 2, the frame. members ofr a railway car truck. As will 35 friction shoes or members are in the form of bell be understood by those skilled in the art,_ a rail cranks or L-shaped levers with iplates 2l) and 2l way car truck includes- two side frame members disposed at right angles and joined by webs 22 A, a transverse truck bolster B, a spring seat C’ in the lower portion of each frame, and a spring cluster C supporting each end. of` thebolster for vertical, movement. The` usual side frame has a central opening D therein, thelower portion of which is wide enough to admitthe bolster endwise. for assembly and dis assemblycf the parts, and the upper portion of which is- narrowed to thewidth of the bolster to guide the 'bolster in its. movement. The usual side frame» is in the formy of a casting which in general comprises two vertical side walls II spaced apart in parallel relation and joined by top and bottom walls I2 and I3 respectively. Openings I4 are generally provided in the side walls, which communicate with the space be tween the walls for access to the interior of the through which the pivot bolts 23 extend to form 40 fulcrums for the levers. The levers are positioned between the side walls of the frame in the upper portion thereof, and the pivot bolts are supported by these side walls. The friction shoes or plates 2| are substantial 45 ly parallel with the bolster end Walls I9, and are maintained in frictional engagement with the bolster side walls by springs 24. These springs 24 are seated upon the `horizontal plates 20 ofthe' bell cranksv and are ‘placed under compression 50 between these plates 20 and the top wall I2 of the side frame and thus act to swing the bell cranks about their fulcrums and force the friction shoes 2l against the bolster end walls I9. While the spring means may be of any suitable form for'theV 55 purpose, I prefer coilV springs for* this purpose; 2,407,875 3 4 Centering lugs 25 are provided on the horizontal said bolster, pivotally mounted friction shoes in said frame positioned adjacent the side walls of plate members 20 and on the inner face of the top wall 2 of the frame to hold the springs in place. the bolster, and having arm extensions above the bolster` and spring mechanism independent In the structures shown in Figs. 3 and 4, the 5 of said bolster supporting spring means posi bell cranks are somewhat in the form of ice tongs tioned between the arm extensions and the frame fulcrumed upon a common pivot bolt 21 and ‘above the bolster acting on said arm extensions mounted in the frame above the center of the to force the shoes into frictional engagement bolster. In this form, the spring pressed arms with the bolster to snub the movement of said 28 of the bell cranks extend horizontally in oppo bolster. site directions and are positioned above the bol 2. In a railway car truck, the combination ofV ster and the springs 24 are positioned under a side frame comprising side walls spaced apart compression between these arms 28 and ñxed and having a bolster opening therethrough, a seats 29 formed on the inner faces of the frame bolster disposed transversely of the truck and side walls and extending crosswise thereof. guided for vvertical movement by the Wall mar The friction shoe members 3D are disposed gins of said opening, spring means below the vertically in substantially parallel relation to the bolster supporting said bolster Vin said frame, bolster end faces to frictionally engage said end pivotally mounted levers positioned between the faces, but friction shoe members associated with ` walls of the frame and having friction shoe por each arm 28 are disposed on the opposite side tions frictionally engaging the side Walls of the , ofthe bolster to that of Vits arm. Each shoe bolster, said levers having arms forming spring member is carried’by the diagonally extended seats, and springs in the upper part of the frame arm 3| which is joined to the corresponding arm above the bolster compressed between said spring 28 and mounted upon the fulcrum bolt 21. As seats and the frame for forcing the shoe portions shown more particularly in Fig. 4, one of the 25 against the bolster. levers‘consisting of the arm 28 and the arm 3| 3. In a railway car truck, the combination of ai: is provided with an opening 32 through which side frame comprising side walls spaced apart the arm 28 of the other lever extends, so that and' having a', bolster openingl therethrough, a the'arms 28 of the levers are disposed on the bolster disposedA transversely of the .truck and opposite side of the bolster to the friction shoes which they carry. lThus in this form of the in guided for vertical movementby the Wall'mar vention the upward pressure of the springs on the’arms 28 swings the shoes into frictional en gagement with the bolster. In this structure, the top wall |5 of the bolster opening is omitted to bolster supporting said bolster in saidV frame, gins of said opening, spring means below the a lever pivotally mounted between the walls . provide operating space forthe arms 3| of the _of the frame adjacent each side of the bol.-V ster and having a friction plate frictionally engaging a verticalV side face of ‘said bolster, levers. In‘th'e rstructure shown in' Fig. 5, the levers arms for said levers providing >spring seats, and coil springs independent of said bolster arersi‘milar to those of Fig. l, except that the spring-'prressed',~ arms 42 of the levers are dis posed vertically in line with the frictional mem bers or shoes 2|. These are extended upwardly intoj the portion of the side frame above the top wall` |5 of the bolster opening in position to'form seats for rthe coil springs 33 which are positioned j supporting spring meansV positioned within the 401 frame above the bolster and compressed’ 'be->` tweenÁ said spring seats and the frame Vfor yield ingly forcing said friction plates against the bolster‘to snub the movement ofthe bolster.1 . 4. In a railway car truck, the combinationvof a side frame comprising side walls spaced apart under compression between these seats and a and having a bolster opening therethrough», a central transverse web 34 in the side frame. bolsterV disposed transversely of th'e'truck'and Thus the springs acting outwardly against the ' guided for vertical movement‘by the wall margins ` armsf42 swing the levers about their fulcrum of said opening, spring means supporting.' said bolts 23 and force the shoe members 2| into fric Ci C bolster in said frame, _vertically disposed friction tional engagement with the bolster walls. If plates pivotally mounted between the walls of the desired, the action of thersprings 33 can be sup frame vadjacent the sides of the bolster, laterali plemented by additional springs 35. These horizontally disposed extensions on said plates,” springs, however, instead of being under com and vertically disposed coil springs within the pression', are under tension and are anchored at Ui Ui frame above said bolster and compressed between; their outer ends by the bolts 36 and with their said lateral extensions and the frame for forcing inner ends connected by means ofthe lugs 31 the friction plates into frictional engagement onÁthe lever arms 42. rl‘hus these springsact to pull upon the arms 42 of the levers and thus their effect is cumulative with respect to the springs 33. ’ ‘ Thus self-contained snubbing mechanism is provided entirely within the confines ofthe side frames.r The friction shoes bear upon the end walls of the bolster and thus serve as snubbers by developing a frictional resistance to the main springs C and thus dampen the compression and recoil or rebound of said main springs to mini mize the vibration imparted to the car body. ` Iclaim: ` ' V1. In a railway car truck, the combination of a side frame having an opening therein, a bolster disposed transversely of the truck and guided for vertical movement in said opening, spring means with the> vertical faces of the bolster to resist*` the, compression and rebound of said bolster sup- ï porting spring means. ' 5. In a railway car truck, the combination'ofaside frame comprising side walls spaced apart , and having a bolster opening therethrough, Va. bolster .disposed transversely of the truck and guided for vertical movement by the Wall mar--V gins, of saidyopening„ spring means supportingv said bolster in said frame,> vertically disposed friction plates pivotally mounted >between .the Walls of the frame adjacent the sides of the 70 bolster, vertical extensions on said plates above the pivots thereof, and horizontally disposed coil> springs within the frame above the bolster open ing and compressed between said extensionsand .i -, a` seat inr the frame for forcing thefriction plates f in the frame below the bolster for supporting 75 into frictional engagement with the vertical side ì 5 2,407,875 faces of .the bolster to resist the compression and rebound of the bolster supporting spring means. 6. In a railway car truck, the combination of' a side frame .comprising side walls spaced apart and having a bolster opening therethrough, a bolster disposed transversely of the truck and guided for vertical movement by .the wall mar gins of said opening, spring means supporting said bolster in said frame, vertically disposed friction plates pivotally mounted between the 10 walls of the frame adjacent the sides of the bol ster, vertical extensions on said plates above the pivots thereof, horizontally disposed coil springs 6 7. In a railway car truck, the combination of a side frame comprising side walls spaced apart andhaving a bolster opening therethrough, a bolster disposed transversely of the truck and guided for vertical movement by ythe wall mar~ gins of said opening, spring means supporting said bolster in said frame, levers positioned be tween the walls of .the frame above the bolster opening and pivotally mounted upon a common fulcrum, ,said levers being disposed horizontally and extending in opposite directions beyond the width of the bolster, and each lever having an arm extending to the opposite side of the bolster, within the frame above the bolster opening and a friction shoe plate on each arm adapted to be compressed between said extensions and a seat 15 swung into frictional engagement with the adja in the frame, and supplemental coil springs un cent side wall of the bolster, and coil springs ver der tension and connected to the extensions and tically disposed in the frame and compressed be ‘the frame and acting cumulatively with said tween seats in the frame and the horizontally eX compressed coil springs for forcing the friction tended levers for swinging said friction plates plates into frictional engagement with the bolster 20 against the bolster. faces to `frictionally resist the compression and rebound of said bolster supporting spring means. WILLIAM A. GEIGER.