US2354975A - Car truck - Google Patents

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Publication number
US2354975A
US2354975A US419104A US41910441A US2354975A US 2354975 A US2354975 A US 2354975A US 419104 A US419104 A US 419104A US 41910441 A US41910441 A US 41910441A US 2354975 A US2354975 A US 2354975A
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Prior art keywords
friction
bolster
springs
shoes
tension member
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US419104A
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Charles L Heater
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American Steel Foundries
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American Steel Foundries
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/12—Bolster supports or mountings incorporating dampers
    • B61F5/122—Bolster supports or mountings incorporating dampers with friction surfaces

Definitions

  • My invention relates to railway car trucks and particularly to a well known form of such car truck which utilizes truss type side frames and a connecting bolster extending in the central bolster openings of the opposite frames.l
  • a portion of the springs are housed in the tension member beneath the bolster opening and another portion of the springs are seated onv the tension member at the bottom of the bolster opening.
  • the springs on the upper level directly engage the bolster and spring seats therefor are afforded on the inner face ,of .the top wall of the bolster end; while legs or extensions are provided on the bottom of the bolster as -a means of engaging the springs on the lower level, saidlegs extending through openings provided therefor .in the spring seat or top chordl of the tension member ofthe side frame.
  • the general object of my invention is to devise a practical and highly efficient form of friction device for such a car truck as that just described utilizing 'resilient means to control the amount of friction developed by the friction absorbing device.
  • Still another object of my invention lis to afford a means of housing a resilient member suitable for accomplishing the above described purpose within the limits prevailing and at the t same time to provide solid protection for said resilient means.
  • Yet another object of my invention is to devise a means of stabilizing the relative lateral motion between the bolster and ⁇ side frame of such a car truck as that described.
  • Figure 1 is a fragmentary side elevation of a car truck embodying my. in-A vention.
  • v Y v Y
  • Figure 2 is a lsectional view through the bolster and side framestructure shown in Figure 1, the section being takensubstantially in the vertical planes indicated by the line 2 2 of Figure 1. f
  • Figure 3 is a fragmentary horizontal sectional view taken through the truck :structure shown in Figures land 2, thesection being taken approxi-r mately in the planes indicated by the line 3-3 Y of Figure 2.
  • y l Figure 4 is a plan View of my novel form of friction plate the view being taken from the outer face thereof.
  • Figure 4A is a topvplan view thereof, and Figure 4B a side elevation.
  • v 4 l Describingl the structure in' detail, my novel arrangement may be applied to a railway car truck comprising a side frame of truss type have' ing a compression member 42 and a tension member 4-with spaced integral columns 6, 6 defining with said members a central bolster opening 8 and spaced window openings I0, I0.
  • The'comn pression member 2 above the bolster opening v8 may be of box-'section and the tension member below said openingmay likewise be of box-secV tion but of relatively great depth as vcompared with said compression member.
  • Said box-section tension member may comprise ther top chord I2 forming a spring seat for the top level springs diagrammatically indicated at I4, I4, andthe bottom chord I6 affordingspaced seats as at I8, 4I8 for the lower level springs diagrammatically indicated at 20, 2U.
  • Said box-Section tension member also comprises the inboard wall or web 22 and theoutboard wall 24/each of which webs may conveniently be cored away at spaced points as at 26, 26 -to facilitate inspection of the enclosed springs.
  • the lower level springs l2l), 20 may be spaced by a central upstanding lug 28 projecting therebetween and the outer wa11 ⁇ 24 may be reinforced by the central vertical rib 30 as likewise the rib 32 may reinforce the inboard wall or web 22, said reinforcing ribs being provided centrally of the tension member to afford maximum support for the spring seat I2 thereabove.
  • the upper level springs I4, I4 are arranged lonfgitudinally of the bolster as may best be seen in the sectional view of Figure 2, the upper ends of said springs being seated as at 34 and 36 against the inner face of the top wall 38 of the bolster generally designated 40, the end of said bolster projecting through the bolster 'opening 8 and extending somewhat therebeyond in order to accommodate the outboard spring I4.
  • each of said legs may be formed upper and lower diagonally arranged surfaceswhich may engage respectively as at 4-4 and 46 with complementary spaced surfaces similarly arranged on the wedge friction shoes 48, 48 at opposite sides of said legs.
  • Each wedge friction shoe 48 is substantially half cylindrical in form as may be seen Y from the sectional view of Figure 3, each shoe having a rectangular central opening or slot 50' on one face of which may be formed saidibefore-mentioned spaced diagonally arranged faces.
  • the outer cylindrical face of each friction shoe 48 may have frictional engagement as at 52 with the complementary v surface 54 ( Figure 4A) formed on the adjacent friction plate 56.
  • each friction plate ,56 is shown in Figure 4 wherein it may be noted that said plate is a casting of somewhat irregular form having the top flange 58 which may be recessed as at 60 in the top chord l2.of the tension member, the upper face of said flange being fiush with the -spring seat at l2 and thus held in proper position by the superposed spring group I4.
  • At the lower end of each friction plate 56 may be formed a central lug 62,which may project into the adjacent opening 26.as additional convenient positioning means as well illustrated inA Figure l.
  • each friction plate 56 and on the face opposite the friction surface thereof may be formed a lug 64 yserving as positioning means for the resilient member or rubber pad 66 one face of which may bearA against the spring seat 68 formed for the purpose on said spring plate.
  • the opposite face of the rubber pad-66 may seat as at (ligurez) ⁇ in the shallow cavity formed therefor on the inner face of they adjacent side wall ofv the tension member and be positioned therein by the central lug 12.
  • a pair of'wedge shoes 48, 4871s associated with the plunger 42 at each side of the ⁇ bolster end and each shoe 46 has com- ⁇ plementary arcuate face engagement with an adjacent friction plate V56 which is positioned with respect to the adjacent tension member wall against vertical movementgwith respect thereto but is permitted lateral movement withrespect thereto.
  • Such lateral movements are limited by the'opposed lugs 64 and 'l2 which also serveas positioning means for the resilient means 66 compressed between each friction plate 66 and the' adjacent side wall of the tension member. Normally each resilient member 66 is subjected to 'some slight-compression as applied andthis compression will be effective to maintain the friction plate in proper engagement with the adjacent friction shoe.
  • the engagement of the legs 64 and 'l2 will also be Veffective to limit the lateral motion of the bolster with respect to the side'frame.
  • a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom chords dening spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the 'adjacent spring and in wedge engagement with the adjacent bolster leg, friction panels movably mounted on the respective tension member walls in abutment with said shoes, said wedge engagement'of each leg with the adjacent shoes being elective to urge said shoes into frictional engagement with the adjacent friction panels, resilient means associated with each of said friction panels and operative to resist longitudinal and transverse movements thereof, and interengaging positioning means on each panel and the adjacent wall.
  • a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom chords defining spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the adjacent spring and in wedge engagement with theV adjacent bolster leg, friction panels movably mounted on the respective tension member walls in abutment with said shoes, said Wedge engagement of each leg with the adjacent shoes being effective to urge said shoes intofrictiona-l engagement with the adjacent friction panels, and resilient means associated with each of said friction panels and operative to resist longitudinal and transverse movements of said bolster.
  • a truss side frame having a tension member, a compression member, and spaced columns defining a bolster opening, said tension member having beneath said opening a box-section with spaced webs forming top and bottom spring seats, springs on said seats,
  • each of said friction shoes cooperating with friction means mounted in the adjacent side wall of said tension member, each of said friction means comprising a friction panel supported on and laterally movable with respect to the adjacent tension member Wall, and resilient means under compression between said panel and said wall.
  • a truss side frame f having a tension member, a compression memprising a friction panel removably and resiliently supported on the adjacent tension member wall.
  • a side frame having a central bolster opening defined in part by spaced columns and a tension member, said'tension member having a box-section with top and bottom chords and inboard and outboard walls, springs on said chords, frictionv shoes seated on said bottom springs, a bolster seated on said top springs and having spaced means projecting through said top chord for wedge engagev ment with the friction shoes associated withV the respective bottom springs, friction panels mounted in said inboard and outboard walls adjacent the respective shoes, resilient means under compression between each friction panel and the adjacent wall, and nterengaging positioning means on each panel and the associated wall.
  • a side frame having a bolster opening, a tension member beneath said opening havingV a box-section with inboard and outboard walls and top and bottom chords defining upper and lower spring seats, springs on said seats, a bolster projecting into said opening and directly supported on said upper springs and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, each of said friction means comprising friction shoes seated on the adjacent spring and in wedge engagement with the adjacent bolster leg, friction panels mounted on the respective tension member walls in engagement with said shoes, and resilient means under compression between each panel and the adjacent wall.
  • a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom chords dening spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the adjacent spring and in wedge engagement with the adjacent bolster leg, friction panels movably mounted on the respective tension member walls in abutment with said shoes, said wedge engagement of each leg with the adjacent shoes being effective to urge said shoes into frictional engagement with the adjacent friction panels, and resilient means supported by said frame and operable to resist longitudinal and transverse movements of said panels.
  • a side frame having a central bolster opening defined in part by spaced columns and a tension member, said tension member having a box-section with top and bottom chords and inboard and outboard Walls, springs on said chords, friction shoes seated on said bottom springs, a bolster seated on said top springs and having spaced means projecting through said top chord for wedge engagement with the friction shoes associated with the respective -bottom springs, friction panels mounted in said inboard and outboard walls adjacent the respective shoes, and nonrnetallic resilient means under compression between each friction panel and the adjacent wall.
  • a side frame having a bolster opening, a tension member beneath said opening having a, box-section with inboard and outboard walls and top and bottom chords dening upper and lower spring seats, springs onsaid seats, a b'olsterprojecting into said open'- ing and directly supported on 'said upper springs and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, each of saidfriction means comprising friction shoes seated on the adjacent springv and in wedge engagement with theadjacent bolster leg, ⁇ friction panels movably mounted on the respective tension memberwalls in engagement with said shoes, and resilient means associated with said panels and operable to resist transverse movements of said bolster.
  • a side frame having a bolstcr.,opening, a Vtension member beneath said opening having a box-section with inboard and outboard walls and top and bottom chords defining upper and lower spring seats, springs on said seats, a bolster projecting into said opening ⁇ and directly supported on said upper springs, and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, each of said friction means comprising spaced friction shoes seated on the adjacent spring in wedge engagement with the adjacent bolster leg, and friction panels resiliently mounted on each wall of said tension member 'in frictional engagement with the respective shoes, each of said panels having a top flange recessed in said top chord and coplanar with the top surface thereof.
  • a car'truck a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom webs defining spring seats, a spring on each of said seats, friction means associated with the spring on said lower seat, a bolster directly seated on said top spring and having means actuating said friction means, said friction means comprising spaced frictio-n shoes, and friction panels resiliently vmounted on the respective tension member walls in engagement with said shoes, said bolster actuating means having wedge engagement with said shoes lto urge them respectively into engagement with the adjacent panels.
  • a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom webs defining spring seats, a spring on each of said seats, friction means associated with the spring on said lower seat, a bolster directly seated on said top spring and having means actuating said friction means, said friction means comprising spaced friction shoes, and friction panels resiliently mounted on the respective tension member walls in engagement with said shoes, said shoes having wedge engagement with said bolster actuating means,
  • a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard Walls and top and bottom chords defining spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the adjacent spring and in wedge engagement with the adjacent bolster leg, and friction panels resiliently mounted on the respective tension member walls in abutment with said shoes.
  • a truss side frame having a tension member, a compression member, and spaced columns defining a bolster opening
  • said tension Lmember having beneath said opening a box-section with spaced webs forming top and bottom spring seats, springs on saidv seats, friction Vshoes seated on ⁇ the springs on said bottom spring seat,v and a bolster extending into said opening and seated onsaid top springs with spaced legs projecting through said top seat for Wedge engagement with'said shoes, each of said friction shoes cooperating with friction means resiliently mounted in the adjacent side wall of said tension member.
  • a side frame having a central bolster opening dened in part by spaced columns and a tension member, said tension member having a box-section with top and bottom chords and inboard and outboard walls, springs on said chords, friction shoes seated on ,said bottom springs, a bolster seated on said top springs withV spaced means projecting through said top chord for wedge engagement with Vthe friction shoes associated with the respective bottom springs, and friction panels resiliently mounted in said inboard and outboard walls adjacent the respective shoes.
  • a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls ⁇ and top and bottom webs defining spring seats, a spring on each of said seats, friction means associated with vthe spring on said lower seat, and a bolster ⁇ directly seated on said top spring and having means actuating said friction'means, said friction means, comprising resilient means oper able to resist transverse movements of said bolster.
  • a 17 In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and'outboard walls and topV and bottom chords dening spring seats, springs on said seats, friction means associated with each of said lower springs, and a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, said friction means comprising resilient pads associa-ted with said walls and adapted to resist transverse movements of said bolster in compression Vand longitudinal movements thereof in shear.
  • a side frame having a. bolster opening, a tension member beneath said opening having a box-section with inboard and outboard walls and top and bottom chords defining upper and lower spring seats, springs on said seats, a bolster projecting into said opening and directly supported on said upper springs, and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, said friction means comprising resilient means adapted to control transverse movements of said bolster.

Description

Aug. 1, 1944. 4 Q HEATER 2,354,975
GAR TRUCK Filed Nov. 14 1941 2 Sheets-Sheet l y L l J Z5 ZZ i v' INVENTOR. BY mzfZL/'jaef @IMM Aug l, 1944- c. L. HEATER 2,354,975
CAR TRUCK y Filed Nov.l 14 1941 2 Sheets-Sheet 2 Eiga K )Tg4/z INV ENTOR.
57am/sy,-
Patented Aug, 1, 1944 CAR TRUCK Charles L. Heater', Chicago, I1l.,`assignor to Amer= `ican Steel Foundries, Chicago, Ill., a corporation of New Jersey f Application November 14, 194.1, seria1N0.:419,10'4
1s claims. rc1. 10e- 197) My invention relates to railway car trucks and particularly to a well known form of such car truck which utilizes truss type side frames and a connecting bolster extending in the central bolster openings of the opposite frames.l
In this particular form of car truck a portion of the springs are housed in the tension member beneath the bolster opening and another portion of the springs are seated onv the tension member at the bottom of the bolster opening. The springs on the upper level directly engage the bolster and spring seats therefor are afforded on the inner face ,of .the top wall of the bolster end; while legs or extensions are provided on the bottom of the bolster as -a means of engaging the springs on the lower level, saidlegs extending through openings provided therefor .in the spring seat or top chordl of the tension member ofthe side frame. Y
y Certain modifications of said car truck have been devised wherein friction absorbing devices are interposed between the downwardly projecting legs on the bolsterend and the lower level springs, said devices comprising friction shoes actuated by said bolster for engagementwith friction means supported on the lateral walls of the tension member.
The general object of my invention is to devise a practical and highly efficient form of friction device for such a car truck as that just described utilizing 'resilient means to control the amount of friction developed by the friction absorbing device.
Expressed in another way it is anrobject of my invention to devise a form of friction control for such a car truck as that described wherein the amount of friction to be developed may be xed within predetermined reasonable `limits and wherein resilient means may be utilized to effect said control. 1 Y
Still another object of my invention lis to afford a means of housing a resilient member suitable for accomplishing the above described purpose within the limits prevailing and at the t same time to provide solid protection for said resilient means.
Yet another object of my invention is to devise a means of stabilizing the relative lateral motion between the bolster and `side frame of such a car truck as that described.
thereof and atthe. same timeaffordvmeans snubbing the vertical movements of said bolster with respect to the supporting frame. l In the drawings, Figure 1 is a fragmentary side elevation of a car truck embodying my. in-A vention. v Y
Figure 2 is a lsectional view through the bolster and side framestructure shown in Figure 1, the section being takensubstantially in the vertical planes indicated by the line 2 2 of Figure 1. f
Figure 3 is a fragmentary horizontal sectional view taken through the truck :structure shown in Figures land 2, thesection being taken approxi-r mately in the planes indicated by the line 3-3 Y of Figure 2. y l Figure 4 is a plan View of my novel form of friction plate the view being taken from the outer face thereof. Figure 4A is a topvplan view thereof, and Figure 4B a side elevation. v 4 l Describingl the structure in' detail, my novel arrangement may be applied to a railway car truck comprising a side frame of truss type have' ing a compression member 42 and a tension member 4-with spaced integral columns 6, 6 defining with said members a central bolster opening 8 and spaced window openings I0, I0. The'comn pression member 2 above the bolster opening v8 may be of box-'section and the tension member below said openingmay likewise be of box-secV tion but of relatively great depth as vcompared with said compression member. Said box-section tension member may comprise ther top chord I2 forming a spring seat for the top level springs diagrammatically indicated at I4, I4, andthe bottom chord I6 affordingspaced seats as at I8, 4I8 for the lower level springs diagrammatically indicated at 20, 2U. Said box-Section tension member also comprises the inboard wall or web 22 and theoutboard wall 24/each of which webs may conveniently be cored away at spaced points as at 26, 26 -to facilitate inspection of the enclosed springs.` The lower level springs l2l), 20 may be spaced by a central upstanding lug 28 projecting therebetween and the outer wa11`24 may be reinforced by the central vertical rib 30 as likewise the rib 32 may reinforce the inboard wall or web 22, said reinforcing ribs being provided centrally of the tension member to afford maximum support for the spring seat I2 thereabove.
The upper level springs I4, I4 are arranged lonfgitudinally of the bolster as may best be seen in the sectional view of Figure 2, the upper ends of said springs being seated as at 34 and 36 against the inner face of the top wall 38 of the bolster generally designated 40, the end of said bolster projecting through the bolster 'opening 8 and extending somewhat therebeyond in order to accommodate the outboard spring I4.
At each side of the bolster end may be formed a downwardly projecting leg or plunger member 42 and on the inboard and outboard faces ofA each of said legs may be formed upper and lower diagonally arranged surfaceswhich may engage respectively as at 4-4 and 46 with complementary spaced surfaces similarly arranged on the wedge friction shoes 48, 48 at opposite sides of said legs. Each wedge friction shoe 48 is substantially half cylindrical in form as may be seen Y from the sectional view of Figure 3, each shoe having a rectangular central opening or slot 50' on one face of which may be formed saidibefore-mentioned spaced diagonally arranged faces. The outer cylindrical face of each friction shoe 48 may have frictional engagement as at 52 with the complementary v surface 54 (Figure 4A) formed on the adjacent friction plate 56. The detailed formof each friction plate ,56 is shown in Figure 4 wherein it may be noted that said plate is a casting of somewhat irregular form having the top flange 58 which may be recessed as at 60 in the top chord l2.of the tension member, the upper face of said flange being fiush with the -spring seat at l2 and thus held in proper position by the superposed spring group I4. At the lower end of each friction plate 56 may be formed a central lug 62,which may project into the adjacent opening 26.as additional convenient positioning means as well illustrated inA Figure l. Centrally of each friction plate 56 and on the face opposite the friction surface thereofmay be formed a lug 64 yserving as positioning means for the resilient member or rubber pad 66 one face of which may bearA against the spring seat 68 formed for the purpose on said spring plate. The opposite face of the rubber pad-66 may seat as at (ligurez)` in the shallow cavity formed therefor on the inner face of they adjacent side wall ofv the tension member and be positioned therein by the central lug 12. y
It will thus be seen that a pair of'wedge shoes 48, 4871s associated with the plunger 42 at each side of the `bolster end and each shoe 46 has com-` plementary arcuate face engagement with an adjacent friction plate V56 which is positioned with respect to the adjacent tension member wall against vertical movementgwith respect thereto but is permitted lateral movement withrespect thereto. Such lateral movements are limited by the'opposed lugs 64 and 'l2 which also serveas positioning means for the resilient means 66 compressed between each friction plate 66 and the' adjacent side wall of the tension member. Normally each resilient member 66 is subjected to 'some slight-compression as applied andthis compression will be effective to maintain the friction plate in proper engagement with the adjacent friction shoe.
The engagement of the legs 64 and 'l2 will also be Veffective to limit the lateral motion of the bolster with respect to the side'frame.
' It is lto be understood that I do not wish'to beA limited by the exact embodiment of the device shown which is merely by way of illustrationand 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 the invention or the scope of the claims'.
I claim:
1. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom chords dening spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the 'adjacent spring and in wedge engagement with the adjacent bolster leg, friction panels movably mounted on the respective tension member walls in abutment with said shoes, said wedge engagement'of each leg with the adjacent shoes being elective to urge said shoes into frictional engagement with the adjacent friction panels, resilient means associated with each of said friction panels and operative to resist longitudinal and transverse movements thereof, and interengaging positioning means on each panel and the adjacent wall.
2. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom chords defining spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the adjacent spring and in wedge engagement with theV adjacent bolster leg, friction panels movably mounted on the respective tension member walls in abutment with said shoes, said Wedge engagement of each leg with the adjacent shoes being effective to urge said shoes intofrictiona-l engagement with the adjacent friction panels, and resilient means associated with each of said friction panels and operative to resist longitudinal and transverse movements of said bolster.
3. In a railway car truck, a truss side frame having a tension member, a compression member, and spaced columns defining a bolster opening, said tension member having beneath said opening a box-section with spaced webs forming top and bottom spring seats, springs on said seats,
yfriction shoes seated on the springs on said bottom spring seat, a bolster extending into said opening and seated on said top springs with spaced legs projecting through said top seat for wedge engagement with said shoes, each of 'said friction shoes cooperating with friction means mounted in the adjacent side wall of said tension member, each of said friction means comprising a friction panel supported on and laterally movable with respect to the adjacent tension member Wall, and resilient means under compression between said panel and said wall.
4. In a railway car truck, a truss side frame f having a tension member, a compression memprising a friction panel removably and resiliently supported on the adjacent tension member wall.
5. In a railway car truck, ya side frame having a central bolster opening defined in part by spaced columns and a tension member, said'tension member having a box-section with top and bottom chords and inboard and outboard walls, springs on said chords, frictionv shoes seated on said bottom springs, a bolster seated on said top springs and having spaced means projecting through said top chord for wedge engagev ment with the friction shoes associated withV the respective bottom springs, friction panels mounted in said inboard and outboard walls adjacent the respective shoes, resilient means under compression between each friction panel and the adjacent wall, and nterengaging positioning means on each panel and the associated wall.v
6. In a railway car truck, a side framehaving a bolster opening, a tension member beneath said opening havingV a box-section with inboard and outboard walls and top and bottom chords defining upper and lower spring seats, springs on said seats, a bolster projecting into said opening and directly supported on said upper springs and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, each of said friction means comprising friction shoes seated on the adjacent spring and in wedge engagement with the adjacent bolster leg, friction panels mounted on the respective tension member walls in engagement with said shoes, and resilient means under compression between each panel and the adjacent wall.
7. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom chords dening spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the adjacent spring and in wedge engagement with the adjacent bolster leg, friction panels movably mounted on the respective tension member walls in abutment with said shoes, said wedge engagement of each leg with the adjacent shoes being effective to urge said shoes into frictional engagement with the adjacent friction panels, and resilient means supported by said frame and operable to resist longitudinal and transverse movements of said panels.
8. In a railway car truck, a side frame having a central bolster opening defined in part by spaced columns and a tension member, said tension member having a box-section with top and bottom chords and inboard and outboard Walls, springs on said chords, friction shoes seated on said bottom springs, a bolster seated on said top springs and having spaced means projecting through said top chord for wedge engagement with the friction shoes associated with the respective -bottom springs, friction panels mounted in said inboard and outboard walls adjacent the respective shoes, and nonrnetallic resilient means under compression between each friction panel and the adjacent wall.
9. In a railway car truck, a side frame having a bolster opening, a tension member beneath said opening having a, box-section with inboard and outboard walls and top and bottom chords dening upper and lower spring seats, springs onsaid seats, a b'olsterprojecting into said open'- ing and directly supported on 'said upper springs and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, each of saidfriction means comprising friction shoes seated on the adjacent springv and in wedge engagement with theadjacent bolster leg, `friction panels movably mounted on the respective tension memberwalls in engagement with said shoes, and resilient means associated with said panels and operable to resist transverse movements of said bolster.
10. In a railway car truck, a side frame having a bolstcr.,opening, a Vtension member beneath said opening having a box-section with inboard and outboard walls and top and bottom chords defining upper and lower spring seats, springs on said seats, a bolster projecting into said opening` and directly supported on said upper springs, and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, each of said friction means comprising spaced friction shoes seated on the adjacent spring in wedge engagement with the adjacent bolster leg, and friction panels resiliently mounted on each wall of said tension member 'in frictional engagement with the respective shoes, each of said panels having a top flange recessed in said top chord and coplanar with the top surface thereof.
V11. In )a car'truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom webs defining spring seats, a spring on each of said seats, friction means associated with the spring on said lower seat, a bolster directly seated on said top spring and having means actuating said friction means, said friction means comprising spaced frictio-n shoes, and friction panels resiliently vmounted on the respective tension member walls in engagement with said shoes, said bolster actuating means having wedge engagement with said shoes lto urge them respectively into engagement with the adjacent panels.
12. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls and top and bottom webs defining spring seats, a spring on each of said seats, friction means associated with the spring on said lower seat, a bolster directly seated on said top spring and having means actuating said friction means, said friction means comprising spaced friction shoes, and friction panels resiliently mounted on the respective tension member walls in engagement with said shoes, said shoes having wedge engagement with said bolster actuating means,
13. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard Walls and top and bottom chords defining spring seats, springs on said seats, friction means associated with each of said lower springs, a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, each of said friction means comprising spaced friction shoes mounted on the adjacent spring and in wedge engagement with the adjacent bolster leg, and friction panels resiliently mounted on the respective tension member walls in abutment with said shoes.
14. In a railway car truck, a truss side frame having a tension member, a compression member, and spaced columns defining a bolster opening, said tension Lmember having beneath said opening a box-section with spaced webs forming top and bottom spring seats, springs on saidv seats, friction Vshoes seated on `the springs on said bottom spring seat,v and a bolster extending into said opening and seated onsaid top springs with spaced legs projecting through said top seat for Wedge engagement with'said shoes, each of said friction shoes cooperating with friction means resiliently mounted in the adjacent side wall of said tension member.
15. In a railway car truck, a side frame having a central bolster opening dened in part by spaced columns and a tension member, said tension member having a box-section with top and bottom chords and inboard and outboard walls, springs on said chords, friction shoes seated on ,said bottom springs, a bolster seated on said top springs withV spaced means projecting through said top chord for wedge engagement with Vthe friction shoes associated with the respective bottom springs, and friction panels resiliently mounted in said inboard and outboard walls adjacent the respective shoes.-
16. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and outboard walls` and top and bottom webs defining spring seats, a spring on each of said seats, friction means associated with vthe spring on said lower seat, and a bolster` directly seated on said top spring and having means actuating said friction'means, said friction means, comprising resilient means oper able to resist transverse movements of said bolster. Y
A 17. In a car truck, a side frame having a bolster opening and a box-section tension member therebeneath with inboard and'outboard walls and topV and bottom chords dening spring seats, springs on said seats, friction means associated with each of said lower springs, and a bolster directly seated on said top springs with spaced legs engaging said friction means respectively for actuation thereof, said friction means comprising resilient pads associa-ted with said walls and adapted to resist transverse movements of said bolster in compression Vand longitudinal movements thereof in shear.
18. In a, railway car truck, a side frame having a. bolster opening, a tension member beneath said opening having a box-section with inboard and outboard walls and top and bottom chords defining upper and lower spring seats, springs on said seats, a bolster projecting into said opening and directly supported on said upper springs, and having downwardly projecting legs cooperating with friction means associated with each of said lower springs, said friction means comprising resilient means adapted to control transverse movements of said bolster.-
CHAS. L. HEATER.
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