US1186902A - Brake-shoe. - Google Patents

Description

C. J. P. HOEHN.

BRAKE SHOE.

APPLICATION FILED MARB, 1915.

1,186,902. Patented June 13, 1916.

INVENTOR. WITNESS gy fi 0e/l., g g BY yams.

ATTORNEY TED s'ratrns rarunr emnmzs J. 110mm, or OAKLAND, CALIFORNIA, ASSIGNOB. ro ENTERPRISE FQUNDRY 00., OF SAN rnsuoisco, camromns, A CORPORATIGN or camroman.

- BRAKE-SHOE.

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Specification of Letters Iatent. Patented J i 13 191% v Application filed March 8,1916. Serial No. 82,843.

To all whom'it may concern:

, .Be it known that I, CHARLES J. P. Honrnv, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Brake Shoes, of which the following is a specification. Y My invention relates to an improved brake shoe for car w'heelsand the like, and resides more particularly in improved means-for positioning -'the shoe with. respect to the brake headupon which it is carried. As is well known, brake shoes of this type are 16 subject to rapid wear, and have very heavy strains imposed upon them, so that wearalso takes place atthe points of connection between'the brake shoe and the brake head. Thisresults in the shoe becoming loose upon the head, and mayeven cause it'to become displaced, so that said shoe no longer bears its proper relation to the wheel. A brake shoe in this condition is extremely dangerous, for the reason that its supporting lugs maybe cracked orbroken by the jarring and strains occasioned by its ordinary use, or the shoe itself may be cracked when forced against the wheel in an abnormal position. In either event the shoe or portions thereof sogare liable to drop upon the-track, in the case iof rail-running vehicles, and cause a serious accident.

Theobjectof the present invention, there- I fore, is .to providemeans associated With the brake shoe for retaining the same in proper position relative to the brake head and the wheel,-even in the event of unusual and excessivewear and looseness between said shoe and said head. Y

To this end'my invention consists in the novel brake shoe fully described hereinafter with reference to the accompanying drawings, in ,which- Figure 1 is a'rear elevation of the brake t-shoe. attached to a brake head, certain portions of the latter being broken away. Fig.

2 is a part-sectional, side-elevation of the same. Fig. 3 is a transverse section taken so the direction of the arrows, showing my Tsafety lugs bearing against both sides of. the brake h ad. Fig. L is a transverse section, similar to Fig. 3, of a modified form of the Linea-av of Fig. 2, and viewed in brake shoe having the safety lug on one side I only.

In the drawings, the reference numeral 1 designates a brake shoe, termed of cast iron or other suitable material, and prefcrably provided with a steel reinforcing strip 2 embedded in its back, said strip having a raised center portion 3 provided with an aperture 4 through. which may be placed a suitable key, not shown in the drawings, for attaching the shoe 1 to a brake head 5 in the Well known manner.

Embedded in the shoe 1, near each end thereof, and preferably beneath the. reinforcement 2, are transversely disposed malleable strips 6 formed of soft steel or other suitable material, the projecting ends 7 of which are bent upward to engage and bear against the side faces 8 of the brake head 5.- Ihese up-turned lugs may be bent to conform to brake heads of diii'erent widths, as, for example, one which is formed orhas been worn narrower than the shoe, asiillus trated in the drawings, or in the case of shoe formed with a groove 9 adapted to over lie the wheel flange, as shown in Fig. 4, the lugs 7 may be employed upon one side only.

The function of the lugs 7'is to maintain the shoe 1 in its proper alinenient with tlu head 5, and therefore in line with the wheel.

By making said lugs of malleable steel in the manner shown, they provide guides for r the shoe even in case the usual cast guide lugs 10 break or are worn off by the constant jarring of the shoe upon the head, and the shoe is thus held in its proper position.

tive lateral movement between said shoe and said head. v

2. In combination with a brake'shoe hav-.

ing means for connection with a brake head,

a malleable'lug projecting outwardly from means for connection with the brake head, a

malleablemember cast within said body and having. its ends projecting outwardly to form lugs-to partially embrace said head to prevent relative lateral movement between said shoe and said head.

4. In combination with a brake shoe having means for connection with a brake head, a pair of spaced malleable-lugs projecting outwardly from the back of said shoe and adapted to partially embrace said head to prevent relative lateral movement between said shoe and said head. i

5. In combination with a brake shoe having means for connection with a brake head, a malleable strip cast within the body of said shoe with its end projecting from the side thereof, said end being bent to project beyond the back of the shoe and positioned to engage the brake head to prevent relative lateral movement between said shoe and said head.

6. In a brake shoe having a reinforcement 'in its back and means for connection with a brake head, a malleable strip disposed within the body of said shoe beneath said reinforcement and having its end projecting from the side of the shoe, said end being bent to project beyond the back of the shoe and positioned to engage the brake head to prevent relative lateral-movement between said shoe and said heady brake head, and a malleable strip transversely' disposed within said body beneath said back, the ends of said strip projecting from the sides of the body and being upturnedto engage the sides of the head, to prevent relative lateral movement between said shoe and said head.

9. In a brake shoe adapted for connection with a brake head, a malleable strip transversely disposed within said shoe, the ends of said strip projecting from the sides of the shoe and being up-turned to engagethe sides of the head, to prevent relative lateral movement between said shoe and said head.

In testimony whereof I have signed my name to this specificationin the presence of two subscribing witnesses.

CHARLES J. P. HOEHN. Witnesses:

WM, F. BOOTH, D. B. RICHARDS.

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