US796946A - Brake-shoe. - Google Patents

Description

UNITED sTATEs WILLIAM PERRY TAYLOR, OF BUFFALO, NEW YORK.

BRAKE-SHOE.

Specification of Letters Patent.

' Patented Aug. s, 1905.

Application iiled December 15, 1904..V Serial No. 236,911.

To all whom t may concern:

Be it known that I,WILLIAMPERRY TAYLOR, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

This invention relates to railway brakeshoes of integral or one-piece construction; and it consists in reinforcing the metal body of the shoe with one or more metal rods composed of a plurality of twisted or interwound strands, the body being cast around the reinforcement or reinforcements.

The object of the invention is to completely surround and rigidlyanchor the reinforcement not only as a whole, but each element thereof, in the cast body, and this is attained by placing' the reinforcement in place in the mold and casting the shoe-body around it. The molten metal not only surrounds the uncovered surface of the interwound strands, but also penetrates through the interstices between the strands, filling the interior or common central space and producing a reinforcement which, in fact, is in part cast metalthat is, integral with the cast body.

Other features and advantages and objects will be hereinafter described and claimed, reference being had to the accompanying drawings and the following description of a preferred adaptation of the invention,

Figure l is a longitudinal vertical section through the improved brake-shoe on line (to, Fig. 2. Fig. 2 is a horizontal longitudinal section through the brake-shoe on line b Fig. 1, following the curve of the brake-shoe. Fig. 3 is a side elevation of the twisted reinforcement detached from thebrake-shoe body. Fig. 4 is a transverse vertical section on line c c, Fig. l. Fig. 5 is an enlarged transverse section through the twisted reinforcement detached from the brake-shoe body. Fig. 6 is an enlarged transverse section through a fragment of the shoe-body and the twisted reinforcement to illustrate the manner in whichthe cast metal fills the interstices between the strands of the twisted reinforcement.

In referring to the drawings for the details of the adaptation. therein shown like numerals designate like parts.

The invention comprises a body in which one or more rods, of wrought-iron, steel, or the like, composed of a plurality of interwound strands, are completely embedded during the casting thereof, the molten cast metal lling the interstices or crevices between the strands.

The brake-shoe consists of a body l, of cast metal, which is curved to the curvature of the wheel, and one or more reinforcements composed of a plurality of twisted or interwound strands 2, each of which is substantially circular in cross-section. The strands are twisted or wound fairly loosely together for mutual support and also to leave narrow spaces or interstices 3, (see Fig. 5,) through which the molten cast metal iiows to fill the common central opening 4, and also completely surrounds each strand. By this means the twisted reinforcement is notonly rigidly embedded in the cast metal, but each of the strands thereof is completely inca-sed in and united to adjacent strands by intervening portions of cast-iron, thereby producing a very-rigid reinforcement of two or more independent strands wound together, but separated slightly or in part by cast metal and gripped solidly in the cast body.

In casting this improved shoe the twisted reinforcement is lirst heated and placed in the mold and the molten cast metal is then poured in. While the strands owing to their twisted and interwound condition mutually support each other, they are separated slightly at least in part or at points to leave interstices th rough which the molten metal ows, filling said interstices and the common central opening L and rigidly uniting the strands to each other and also gripping the reinforcement rigidly within the cast body. All the advantages of a solid reinforcing-rod are obtained by this construction,with the additional advantages of greater strength contained in a plurality oftwisted strands and a greater surface for the cast metal to adhere to, the practical interlocking of portions of the cast metal between the strands of the reinforcement, and, in fact, the joining or uniting of the strands by parts of the cast metal and the filling of all interstices, openings, or crcvices in the twisted reinforcement by portions of the cast metal.

The form of railway brake-shoe to which this invention is particularly adapted is the curved one-piece brake-shoe known as the Master Oar-Builders standard, and two of the twisted reinforcements are preferably utilized, which are curved to the curvature of the brake-shoe body and extend longitudinally therethrough and parallel to each other, each being completely embedded and gripped within the body. It is obvious, however, that it may be utilized in various other forms of brake-shoes without departing` from the spirit ofthe invention, which comprises n reinforcement of a. plurality of fairly loosely twisted strands within a brake-shoe body.

I claim as my inventionl. A brake-shoe comprising` a body cast complete in one piece, and n reinforcement within said body composed of a plurality of twisted strands.

2. A brakeshoe comprising a body cast complete in one piece, and n reinforcement within said body composed of a plurality of loosely-twisted strands having the interstices between the strands {illed with cast metal.

3. In adevice of the class described, abody of cast metal and a reinforcement completely embedded and secured in said body when cast and composed of a plurality of intertwisted strands of wrought metal.

4. In a device of the class described, a body of cast metal and a reinforcement completely embedded and secured in said body when cast and composed of a plurality of intertwisted strands or' wrought metal, said reinforcement extending longitudinally from end to end of said body and being suiciently loosely twisted to permit tbe cast metal of the body to How between and completely su rround each strand.

NVILLIAM PERRY TAYLOR.

Witnesses:

L. M. SANGSTER, GEO. A. NEUBAUER.

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