US2197399A - Brake beam shoe - Google Patents

Description

April 16, 1940-r c. K. STILLWAGON BRAKE BEAM SHOE Filed Nv. 8. 1937 2 sheets-sheet 1 lllll April 16, 1940. c. K. STILLWAGON BRAKEV BEAM SHOE 2 sheets-sheet 2 Filed Nov. 8, 1957 INVENTOR.

4I... ATTORNEYS.

Patented Apr. 16, 1940 pgnrEN/.r vOFFICE 12.191.399 y femke BEAM'fsHoE -Charles Stillwagon,

Johnstowngf- Pa., nassigunorV to Davis Brake Beam Company,l Johnstown, Pa.,l

a coi-'porationgof li'ennsylvanav V p Application November s, 1937,"seriainoi'flzaaee zolaims. (o1. .18s-212).

This inventionrelates to railwayfcarlftruck "brake rigging, and'm'orefparticularly'to the-brake beams thereof. l

The common way oi'su'pporting brake beams in A railway oarV trucks isbyf-hangers that are? -suspended from brackets attached to the cari truck side frames, the lowerlendsofthe hangers "being connected to brake heads-secured to theends ofthe beams. More'recently it has-been proposed to eliminate the hangers and hanger brackets and to support the brake beams at their ends onA ends of the beams with satisfactory surfaces for sliding engagement with their supporting ledges, -and it therefore an object ofthis invention to overcome this difficulty by attaching Ishoes of i the'desired contour tothe beam ends., Other objects are to protect the beam ends againstwear and to balancethebeam.

In 'accordance' with this invention a shoe is `mounted oneachend of such'af brakefbeamsand extends between the adjacent side frame ledges for supporting the beam without-any necessity for hangers. The shoe is intheform ofvabody' of' metal that receives'the end of thebeamand has smooth ledge-engaging surfaces. Italso'pref- Terably Vhas a lateral `'extension projectingy toward the adjacent car wheel for aiding in balancing the beam. The shoefmayeither extend inwardly Y along the beam far .enough to support a brake head, or it may be shortso that the brake head can be mounted directly on the end portion of' the beam adjacent the inner face of the shoe.

The invention is illustrated in the accompany- 'ing drawings in which Fig. 1 isa fragmentary plan View of a railway car truck and brake rigging; Fig. 2 is an enlarged view of one end of a brake beam with my shoe connected thereto; Fig. 3-is a vertical section of .the beam and shoe taken on the line III-III of Fig. 2; Fig. 4:v

is a fragmentary inside view of ar truck side frame showing in vertical section the opposite end of the brake beam and its shoe; Fig. 5 is a View sim` ilar to Fig. 2, but of a modification with a brake head attached directly to the beam; Fig.` 6 is a vertical section taken on the line VI-VI of Fig.- 5; and Fig. '7 is a View similar to Fig. 6 of a modilied brake head and manner of attaching it to the brake beam.

` Referring toFig. 'l offfthe drawings, a railway vcar wheel'l'is journale`d` in one end of a car truck lside frame 2in the customary manner, and

va ybrake beam 3 `is disposed in'r the usual location-`1 and is vactuated to apply and release a brake shoe" 4by a'brakelevertV 'to which aconnecting rod l 'and 'a .piston rodj 8;' are pivotally connected. The brake shoe 'is 'carriedby a brake head 9. cony necteditov the'end'portion' o'f the brake beam. In-

passing throughA the' brake fheads and suspended "fromb-rackets attached to' theside frames, the

by they side frames.`

"endso'f the beam are slidably supported directly lside frameis' provided'wlth a pair of vertically spaced beamfsupportngj brackets ory ledgesr ll whichjinay be'iormed in the frame or may provjectlaterally' therefromas-:integral or separate stead"of supljlorting r the brake beam by hangeg'izlo stantially parallel and are shownin Fig.4 as ex- `vtending substantially radially ofthe wheeL'which `is thef'direction` irl-which the beam moves in ap,-

vplying the brakesf `The end'portions of the brake beam are ,extended outwardly far enough to project betweenthe 'ledges by'fwhich'the' beam is supported-`and`-heldin place vertically although fallowedfto slide `forwardly and backwardlyf between theledges to `applyl or releasethe brake ``shoes. l Although'the 4shape* v'or yconstruction of the br'akebeam is not important as fares this invention is'oncerned, the one illustrated is formed ffrom" a sin'gle'rolled vbar having 'the cross-sec- 'ftion of? thisbarzisf-'cut away-from the T portion except at its ends, and the bar is then upset to on'al vform 'showninFig 3; The cylindricalpol-e permit the cylindrical portion to be bowed outwardlyto form the tension member of the onepiece beam. It will be appare-nt that the irregul lar contour of theend portions of the beam is undesirable and unsatisfactory as Aa bearing against the ledges, and that the beam ends and ledges'would soon wear each other away if alloWed to engage .each other.

' It is afeature ofthis invention that suitable bearing surfaee'sare provided between thebeam ends and the ledges to prolong their lives and to insure smooth operation of the beam. Accordingly, there is mounted on each end of thebeam a vshoe l2 that vcompensates for the irregular contour of the beam end and forms a satisfactory bearing "against `the ledges. ably consists of a body ofr metal adapted to re- This shoe prefer-` ceive and enclose the end portion of the brake beam for which purpose it is provided with an opening conforming to the end section of the beam and extending inwardly from the inner end of the shoe, as shown in Figs. 2 and 3. The shoe is provided with substantiallyparallel upper and lower faces for engaging an upper and lower ledge I I, respectively, between which the shoe slides. .y y

Any convenient manner of attachment may be used for fastening the shoe to the beam. In the shoe illustrated in Figs. 2 and 3fits outer end portion is provided with recesses I3 in which the heads of a rivet I4 are countersunk to prevent them from striking the ledges II. The rivet passes through the compression member of the.

beam for initially securing the shoe t'o the beam. Instead of a solid one-piece shoe, the shoe may be split along one side or'be formed in two pieces fastened together around the beam end. The inner end portion of the shoe isprovided'with openings I6 aligned with openings in the brake beam in which suitable fastening members I'l are inserted for connecting the brake head 9 directly to the shoe. For this purpose the brake head is p-rovided with parallel jaws adapted to slip over the parallel surfaces of the shoe, as indicated in broken lines in Fig. 3. The head can thus be removed without disturbing the shoe.

It is another feature of this invention that the outer end portion of the shoe? I2 is provided with an extension I8 projecting laterally towards the adjacent wheel, as shown in Figs 2 and 4, to increase in that direction the length of the bearing area between the shoe and ledges whereby to aid in balancing the beam by preventing it from tilting. This increased bearing area also causes the bearing surfaces of the shoe to wear more evenly instead of wearing rapidly at two diagonally opposite corners. As shown in Fig. 2, the vertical end face I9 of the shoe is preferably arcuate to facilitate insertion of the beam between the ledges, it being the practice to first insert one end of the beam between one pair of ledges and to then swing the other end of the beam in between the opposite pair of ledges.`

It will be understood from this disclosure that the irregular end portions of a brake beam are enclosed by shoes having smooth bearing surfaces for engaging the ledges that support the beams. A further advantage is that all wear is taken up by the shoe, which can be easily and cheaply replaced, instead of by the brake beam Also, the form of the shoe aids in balancing the beam and preventing undue wear of shoe and ledges. In case it is desired to use brake hangers in addition to the ledges, the ledges would be curved longitudinally to permit the beam to move in an arcuate path.

In the modification shown in Fig. 5 the shoe 2I is considerably shorter than the one just described so as to leave room for connection of brake head 22 directly to the brake beam 3. The brake head is first slipped over the end of the `beam and moved inwardly until -in position to be secured to the beam, as shown in Fig, 6. Then the shoe is mounted on the end of the beam. Although the shoe must be removed before the head can be taken olf the beam, this construction permits the use of heads of conventional design for this beam.

Fig. 7 shows a brake head 26 adapted to be used with the short shoe 2| of Fig. 5, but this head is provided with jaws spaced far enough apart to allow the head to be slipped transversely over the beam after the shoe has been secured in place. To steady the head on the irregular beam end, filled blocks 21 are used.

-According to the provisions of the patent statutes, I have explained the principle and 'construction of my invention and have illustrated and described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claims, the invention may Ibe practiced otherwise ythan as specically illustrated and described.

I claim: l. The combination with a brake beam having ends of irregular cross section adapted to be sup- I ported by ledges associated with car truck side frames, of a shoe for each end of the beam provided with a recess for receiving the beam end to enclose it, said recess being irregular in cross section to conform to the shape of the beam end, and vsaid shoe being provided with substantially parallel upper and lower faces for slidably engaging said ledges.

1 2. .The combination with a brake beam having ends of irregular cross section adapted to be supported by ledges associated with car truck side frames, of a shoe enclosing each end of the beam and provided with substantially parallel upperA and lower faces joined at their inner ends by an inner face, a brake head mounted on the brake beam adjacent the inner face of each shoe, said head'having substantially parallel jaws adapting the head to be slid transversely over the beam,'."

ller `blocks mounted in the space between the parallel jaws and the irregular beam` ends, and means for securing the head and blocks to the beam.

' CHARLES K. STILLWAGON. ;4

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