US172837A - Car-brake shoes - Google Patents

Description

I w. awn-n.

I CAR-BRAKE SHOES.

vNo. 17Z,837.

rammed Feb. 1,1876.

Specification forming partof' Lett'ers Iatent No; I application r J a June9,1875.

in the countyof Alexandria 'and State of Virginia, have invented certain new and- -useful Improvements in Shoe-Hangersfor Railroad Brakes; and I do hereby declare'that the following is a full, clear, and exact, (loser-i1) tion thereof, which will enable others-skilled in the .art to which it pertains to make and use the" same, referencebeinghad to the ac V vconstructiomj Onits back-there "are two'glug companying drawing, and to. thelettersof reference marked thereon, which form a part of this specification.

' My object is to providea simple and. effective means for locking. the brake-shoe to' its hanger, andfor accomplishing a durable connection ofthe brake-beamwith such hanger,

and its proper adjustment to" accommodate-. a i the shoe to the tread-of the wheel.

The shoe is, locked to its"hanger at two: points by lug projections of the shoe andlaps of the hanger, and these parts thus interlocked are secured by a single bolt passing through the upper end of the shoe and keyed to a lug-projection from, the upper hangerlap. The shoe is also interlocked with the hanger, so as to prevent lateraldisplacement.

An eyed bolt is secured in a central socket at the back of the hanger and confined by a strong bolt passing through said eye and lugs of the hanger, and this bolt holds the carriage for the brake-beamin such manner that the shoe and its hanger have an accommodating function upon the carriage, in order that the shoe may be always concentric with the wheel,

and thereby prevent any rubbing and wearing action upon the, shoe.

An adjusting-screw on the beam-carriage determines the proper adjustment of the shoe.

Inconnection with the interlocking points of bearing of the hanger upon the shoe, the hanger has also a central bearing upon the back of the shoe, to obtain thereby intermediate free spaces through which the air passes to prevent the undue heating of the partsand especially the communication of great heat to the wooden brake-beam.

The shoe-hanger is suspended from the truck-frame by the ordinary link-connection.

The features of invention will be specifically embraced-in the claims,-and thereby distinguish. what is new 'fromwthatewhich is found .in other brake-shoes.-

represents an-elevation.ofmyimproved brakethesame Fig; 31s arear view of the sh0e,-and

Fig.4 is' a'detachedperspctive'view of the shoe-hanger with the brake-beam removed to:

expose the central hinged bolt. The'metallic shoe '0 may be of the ordinar proj ections,b b,the lower one of which,:b',- form's a horn, curving downward-T tocoincide with the lower upwardly-curved lap c of thehanger A, while the upper-011mb, ext-ends into'th'e upper hanger-lap c, which also receives the link (i, by which the br'ake-shoeis-suspendedi:-

ijoinedl while these parts are secured to each other by means of abolt, a, passing through the upper end of theshoe, with its head counter'su nkinjthe friction-face of the'l-a'tter,and

extending; through an ear or projection, f,

'from the upper lapgo. of the hanger A, to 'whichit issecured by'a split' key, g,driven ;through the bolt against the outside of said locking-ear. p p

- The shoe is provided centrally on its outer side withia horizontal cross-opening, formedin two bearing-lugs, h h, through which a strong bolt, 6, passes to confine a strong central bolt,

j, upon which the cross-beam carriagek ismounted' The central'bolt j, for this purpose, has an eye on its inner end, andis secured within the space formed between the said bearing-lugs h, so that it can be adjusted upon the cross-bolt '6, which serves as a hinge to .the central bolt, the two bolts occupying positions at right angles to each other. The

outer end of the latter is provided with a nut, l, by which the beamand its carriage k is clamped to the hanger. This hanger has a central cross semi-cylindrical concavity, which fits and has its bearings upon the corresponding lugs h, through which the central bolt i passes, whereby the beam-carriage k may have an adjustment determined by an adjusting-screw, a, passing through a lug, p,

on the lower side of said beam-carriage in position to bear upon the rear side of the In the accompanying drawings; Figure 1 .By this connection the shoe and hanger are placed when worn out by the removal of the adjusting-screw n,- and the carriage itself is a replaced with the parts when desired.

port only to the shoe, while .it is interlocked hanger, in order that the shoe and the hanger may be set to conform to the radius of the wheel, and thereby prevent any undue friction and wear upon either end of the shoe- I have described the shoe as having a lower and an upper interlocking lug-bearing, b b, and in addition to these-a central bearing, q, is formed upon the inner side of the hanger, which bears upon the rear side of the shoe, to gi ve strength and solidity to the latter intermediately between its points of suspen sion,.and leave open spaces 1" between the contiguous parts of the shoe and its hanger, to prevent am y undue heating of these parts, and to lessen the danger of the heat of the metal extending. to the wooden cross-beam s, the whole device forming a very durable shoe-hanger of simple construction, whereby the shoe may be resplit key from its confining-bolt.

I have described a single shoe and its hanging device; but it is obvious that the same construction is applied to each end of the crossbeam. o

The inner side of each beam-carriage 7c is made convex on each side ofits concave socketbearing m upon the bolt-lugs h, to give free.- dom for the adjustment of said carriage by the single casting, with sockets toreceive the ends of the cross-beam.

The double locking-lugs b b of the shoe and the horns c c of the hanger serve to support the. shoe wholly, and the single fastening-bolt 6 simply holds these parts together without any strain, either from the shoe or hanger, whereby the bolt can be easily removed and- This lug-connection affords a vertical supwith the hanger, so as to prevent all side displacement, by means of projections s s on the inner face of the hanger fitting into recesses H in the back of the shoe, the lower lug projection I) being divided, as shown in Fig. to receive the projection s in the hollow thelapc. The interlocking of the shoe and its hange I is, by this construction, made at four point: to hold the shoe secure and admit of its remo al and replacement with the least possibl trouble.

The following is claimed as new in shoe d1 vices for railway-car brakes, namely f l. The combination, in a brake-shoe, of th separate hanger-plate A and the separat I beam-carriagevk, united to each other by th joint-bolts i and j, and to the shoe by thelu projections -b b c c and the bolt 6, passin through the shoe and the hanger projection all constructed substantially as herein S forth.

2. The hanger A, provided with the centre bearing-lugs h. h, in combination with th bolts iand j and the cross-beam carriage] the carriage-bolt j being secured at right a gles to the hanger-bolt, between the saidbeal ing-lugs, substantially as and for the pnrpos herein set forth. g c y l 3.The combination, with the brakes-she hanger A and the cross-beam carriage'k, ha\ ing a hinged or accommodating connectio with each other, of the adjusting-screw 1 carried by said carriage for adjustment in I'( lation to the hanger, for the purpose stated. 4. The combination, withthe lug projection b b of the shoe, and the horns c c of the hang 'er, of the interlocking lugs s s and their r cesses t t, whereby the shoe is secured agains lateral displacement and without side strai on the bolt, as described.

' In testimony that I claim the foregoing have aflixed my signature in presence of tw witnesses.

WILLIAM H. WARD. Witnesses: j

A. E. H. JOHNSON, J. W. HAMILTON JOHNSON.

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