US726339A - Brake-shoe for railway-brakes. - Google Patents

Description

PATENTED APR. 28, 1903.

J. PLAYER. BRAKE SHOE FOR RAILWAY BRAKES.

APPLICATION FILED FEB. 12, 1903.

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ESSES ATTORNEY No. 726,339. PATENTED APR. 28,1903.

. J. PLAYER;

BRAKE SHOE FOR RAILWAY BRAKES.

APPLICATION FILED T11R12, 1903.

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JOHN PLAYER, OF RIVER FOREST, ILLINOIS.

BRAKE-SHOE FOR RAILWAY-BRAKES.

S1?EGIFICATION forming part of Letters Patent No. 726,339, dated April 28, 1903.

Application filed February 12, 1903. Serial No. 143.128. (No model.)

To aZZ whom it may concern:

Be it known that 'I, JOHN PLAYER, a citizen of the United States, residing at River Forest, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Brake-Shoes for Railway- Brakes, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates toimprovements in brake-shoes of the composite type for railwaybrakes, the construction of which will be fully understood by a reference to the accompanying drawings, which form a part of this specification, and in which- Figure l is an elevation of the face of a brake-shoe which embodies my invention. Fig. 2 is a longitudinal section on line A A of Fig. 1. Fig. 3 is an elevation of a steel plate used in my construction. Fig. etis a side view of Fig. 3.

The same numeralsindicate identical parts in the several views.

The object of my device is to provide a brake'shoe of the composite type wherein the desirable qualities of a cast-iron shoe will be largely maintained and the structural strength, durability, economy, and safety whereof will be greatly increased in com parison to a cast-iron shoef All of the above objects I claim to have attained in the shoe herein shown and described, while the initial cost of same has not been materially increased.

My improved brake-shoe is constructed substantially as follows: A plate of sheetsteel 1, preferably of about 8 gage, is placed in a specially-constructed punch and forming press and a product there produced such as is shown in Figs. 3 and 4, the same being a sheet of steel somewhat shorter and narrower than the face of the shoe into which it is to be cast. The plate is concaved longitudinally, the radius of said concavitycorresponding approximately to the periphery of a car-wheel. Tongues 2 are punched from said plate and their free ends carried inwardly, so that they project into the concavity aforesaid. At the center of plate 1 two clips or ears 3 are formed, which project outwardly from the convex side and in the opposite direction from tongues 2. Holes 4 are formed in the clips 3 for the pn rpose hereinafter set forth. The plate thus formed is placed in the mold of a brake-shoe, and a foundry metal, preferably cast.iron, is cast thereabout, the plate 1 occupying a position much nearer the back of the shoe than the face and with the ends of tongues 2 appearing at face 5, Fig, 2, thus forming the composite face. Clips 3 are surrounded by the cast-iron, which forms the attaching-lug 6 of the shoe, and thus it will be readily understood that the plate 1 forms a perfect bond for every portion of my shoe, and if the castiron should become fractured to a very con siderable extent it is still all held firmly together by the steel plate, and if the cast-iron in the attaching-lug 6 should be wholly severed from the body of the shoe by fracture the shoe would still be securely held to the brake-head by the steel clips 3, the holes 4 in said clips 3 being for the purpose of receiving the attaching-key.

It will be readily seen that the shape and location of the tongues 2 might be greatly varied without departing from the spirit or scope of my invention and that plate 1 could be in any way mutilated provided that the metal formed by such mutilations be carried away from the face of the plate sufficiently far to cause it to appear at the face of the foundry metal and provided, further, that a portion of said plate projects in such a man nor as to cause it to become incorporated with the foundry metal in the attaching-lug in substantially the manner shown and for the purpose set forth.

Having thus described my device, what I claim as new, and desire to secure by Letters Patent, is-

1. In a composite brake-shoe for railwaybrakes, a mutilated steelplate of substantially the width and length of-the shoe, with foundry metal cast thereabout, inthe form of a brake-shoe, a portion of the projecting I said shoe, and other portions thereof are em- 10 metal caused by the mutilation aforesaid be- I bodied in the attaching-lug. ing exposed at the concave face of the shoe, In testimony whereof I affix my signature and a portion thereof projecting, so as to be I in presence of two witnesses. incorporated in the attaching-lug. T

2. A brake-shoe for railway-brakes, con- JOHN PLAX sistiug of a mutilated steel plate, inter-cast Witnesses: with a foundry metal, in such a manner that A. F. MILLER, portions of said plate appear at the face of GEO. C. MILLER.

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