US1045564A - Brake-shoe. - Google Patents

Description

Patented Nov. 26, 1912.

Inventor:

Q I 1. I 1 1 l l 1 1 1 l. 1. l l I 1 l l J. J. KINZER.

BRAKE SHOE.

APPLICATION FILED 111111.20, 1912.

FISAQL v witnesses par i'r rrr.

JOHN JACOB KINZER, OF WILDWOOD,

PENNSYLVANIA, ASSIGNOR T0 PITTSBURGH PENNSYLVANIA.

BRAKE-SHOE.

Specification of Letters Patent.

Patented-N ov. 26, 1912.

Application led April 20, 1912. Serial No. 692,059.

To all whom 'it may concern:

Be it known that I, JOHN JACOB KINZER, a resident of lVildwood, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Brake-Shoes; and I do hereby declare the' following to be a full, clear, and exact de scription thereof.

My invention relates to brake shoes a d has special relation to the class of su h shoes which are provided with an inclosed metallic casing around a filling of frictional material for engagement with a wheel in braking. Heretofore in the use of these brake shoes it has been found that they will wear down only on one side of the same in their braking on a car or other like wheel, which in some cases is caused by the hanger and brake beam on the car carrying the shoe being worn or out of place, so that the shoe is pressed more closely on the flange of the wheel on one side, While in other cases `the shoe may extend outbeyond the outer edge of the face of the wheel, and thus wear down only that part of the shoe bearing on the wheel and which in many cases the wear is only von one halfl ofthe shoe, thereby causing a great loss in the value of the shoe.

The object of my invention is to overcome these difficulties and to provide a` cheap, simple and etlicient form of a brake shoe or casing which will enable the shoe to be reversed when worn down on one side, so that the other side can be placed in engagement with the wheel and thus allow the whole face of the lling material to be worn down uniformly, while at the same time when the shoe is reversed it will avoid the metal of the casing, coming in contact with the wheel.

To these ends my invention consists, generally stated, in the novel arrangement, con.. struction and combination of parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my improved brake shoe, I will describe tlie same more fully7 referring to the accompanying drawing, in which- -Figure 1 shows an end view of an ordilnary approved form of a brake'shoe showing it in engagement with the flange'of a car wheel and with one side of the same worn down thereby. Fig. 2 is a like view of a similar shoe in engagement with a car wheel and with one side worn down by the outer edge of such wheel. Fig. 3 is a side elevation of my improved shoe. Fig. 4 is an end view of my improved form of brake shoe. Fig. 5 is a cross section of the shoe. Fig. 6 is a view of my improved shoe in engagement with the car wheel.

Like symbols of reference herein indicate like parts in each of the figures of the drawing. y

As illustrated in the drawing 1 represents my improvedl brake shoe, which comprises an inc/losing casing and a lling of frictional material inserted within such casing. The casing `2 is preferably formed from sheet, plate or other metal, having a substantial degree 'of strength and ductility, such as cast, malleable, wroughtor other steel or iron and when formed from sheet vor plate metal it is pressed or bent in suitable dies into a structure having an integral back wall 3,V side walls 4 and end walls 5, as well as being open at its front for the insertion of the lilling material c!y and curved in accordance with the periphery of the car wheel b, on which the brake shoe 1 is to be used.

The, usual supporting lug 6 is connected or fixed to the back 3 of thecasing 2 in any suitable manner for connecting the shoe l to the ordinary brake head or hanger (not shown), and is preferably separate therefrom, as shown, by having its inner ends 6 passed through slots in said back and turned against the inner face of the same to connect said lug to said casing. Short bearing surfaces 7 which are adapted to abut against bearings on the ends of the brake-head or` hanger are formed on the back wall 3 of the casing 2, adjoining its ends, while central or intermediate bearings on said head or hanger are adapted to abut against said back wall and on each side of the lug 6.

rlhe rubbing or yfrictional action of the brake shoe upon the wheel l) is exerted by the frictional member a which consists of a filling of any suitable material, such as cast iron or a composition of matter specially prepared for the purpose, and of such character as to exert proper and sucient fricafter hardening, by the walls 3, 4 and 5 of said casing, so that when in place in such casing the filling a inthe ordinary cases will have its wheel bearing surface a substantially flush with or extending slightly beyond the inner edges of said casing walls.

In the former use of the brake shoe 1, as hereinbefore described, where the brake hanger or brakevbeam-was worn or out of place, the inner side 4 of the shoe casing 2 .and filling material a would wear down by reason of the vengagement of such inner side of the shoe 1 lwith the flange d of the wheel b, as shown in Fig. 1, and such inner side of the casing and filling material of the shoe Vwill also wear down in like manner from the same cause or defects in the hanger and beam in the engagement of such inner side *of the casing with the tread or periphery c of the wheel'b by the outer side of such shoe y extending beyond the outer edge or tread of such wheel, as shown in Fig. 2. In the present form .of the brake shoe 1 the side walls 4 of the casing 1 are made considerably shorter in height than the bearing face a 'of the filling material a and end walls 3 ofthe casing, so that when the inner side of the shoe bears againstthe iiange d of the wheel b and corner connection d between said flange and tread c or when the shoe bears against the outerportion of the tread c of such wheel and extends beyond such tread and is thus worn down thereby in only a portion or one-half of the shoe, such shoe can then be removed from the brake head or hanger in the ordinary manner and reversed thereon when again placed in position, which will enable the other portion or half not worn down to bear against said wheel flange or outer portion of such wheels tread and be worn down to a generally uniform bearing face on the shoe. The end walls 5 of the shoe 1 can be curvedat their corner connections 3 between such walls and the side walls 4 in order to conform to the curved connection d between the wheel flange d and the tread c on the Wheel b in order to allow for the wearing down of both sides of the shoe,I so that such end walls are thus enabled to be of the full height by extending to the bearing face of' the filling material a for support-ing such filling against frictional strain on the shoe.

It will be-evident that, if desired, my improved brake shoe 1 can have its side walls 4V corrugated, instead of fiat, while various o ther modifications and changes in the design and construction of suchl shoe may be ,side and thus save a great loss in the value fore', be enabled to have its bearing face 'wear down uniformly and its casing will noaasca the hanger so that both sides of the fricvtional bearing surface on the samecan be brought into engagement with the wheel in case of the shoe wearing down only on one of these shoes where they lare thrown away ,75 after being worn down on one side and the construction of -the same will not permit them to be reversed. The shoe will, therenot interfere with its work in this respect.

What l claim as my invention, and desire to secure by Letters-Patent, is-

' 1. A brake shoe comprising an inclosing casing and a filling of frictional material,

said casing'being provided with ends and sides around said material and having its vsides shorter` than said ends and terminating short of the bearing face of said material.

2. A brake shoe comprising an inclosing casing and a filling. of irictional materiah said casing .being provided with ends and sides around said material and having its sides shorter than saidv ends and terinlnating short of the bearing face of said material, and said ends being curved at their connection with said sides to conform to the shape of the wheel between its iiange yand tread. l

3. A brake shoe comprising an inclosing casing and a filling of rictional material, said casing being provided with ends and sides around said material and havin its sides shorter than said ends and termlnating short of the' bearing face of said material, said sides being corru ated.

n 4. A brake shoe compris1ngan inclosing casing anda lling of frictional material, saidv casing beingprovided with ends and sides around said material and having its sides shorter than said ends and terminating short of the bearing face of said material, and said ends being curved at their connection with said sides to conform to the shape of the wheel betweenits flange and tread, said sides being corrugated.

5. As a new article of manufacture a bra-ke shoe casing having both of its sides shorter in height than the ends of the shoe.

-6. 'As a new article of manufacture a brake shoe casing having both of its vsides shorter in height than the ends of the shoe and corrugated.

l7. As anew article of manufacture a brake shoe casing having both of its sides shorter in height than the ends of the shoe, said ends connecting said sides by curved portions.

8. As a `:new article of" manufacture a brake shoe casing having both of its sides shorter in height than the ends of the shoe and corrugated, said ends connecting said sides by curved port-ions.

9. A brake Lshoe comprising a metallic casing and a .filling of frictional material, said casing being provided with ends and sides around said material and having its sides shorter than said ends and terminating short of the bearing face of said material.

10. A brake shoe comprising a metallic casing and a filling of frictional material, said casing being provided with ends and sides around said material and havin its sides shorter than said ends and termlnating short of the bearing face of said material, and said ends being curved at their connection with said sides to conform to the shape of the wheel between its flange and tread.

11. A brake shoe comprising a metallic casing and| a filling of frictional material, said casing being provided with ends and sides around said material and having its sides shorter than said ends and terminating short of Jche bearing face of said mate.

rial, said sides being corrugated.

12. A brake shoe comprising a metallic casing and a filling of frictional material, said casing being provided with ends and sides around said material and having its sides shorter than said ends and terminating short of the bearing face of said material, and said ends being curved at their connection with said sides to conform to the shape of the wheel between its flange and tread, said sidesbeing corrugated.

13. As a new article of manufacture a metallic brake shoe casing having both of its sldes shorter in height than the ends ofthe s oe.

14. As a new article of manufacture a metallic brake shoe casing having both of its sides shorter in height than the ends of the shoe and corrugated. 4

15. As a new article of manufacture a metallic brake shoe casing havingboth of its sidesY shorter in Aheight than the ends of the shoe, said ends connecting said sides by curved portions.

16. As a new article of manufacture a metallic brake shoe' casing having both of its sides shorterin height than the ends ofthe shoe andcorrugated, said ends connecting said sides by curved portions.

In 'testimony whereof, I the said JOHN JACOB KINZER, have hereunto set my hand. J OHN JACOB KINZER. Witnesses:

J. N. COOKE, T. B. HUMPHRIES.

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