US578427A - Brake-shoe for railway-cars - Google Patents

Description

(No Model.)

O. T. STEWART.

BRAKE SHOE FOR RAILWAY CARS. No. 578,427. Patented Mar. 9, 1897.

WITNESSE w NTOR THE NORPIS PETERS IN T N ATTORNEVJZ .To all whom it may concern:

similar vehicles where devices of this class tion I have shown at 5 a brake-shoe of the cast-iron of the usual or any preferred degree UNITED STATES i PATENT FFICE.

CHARLES T. STEWVART, OF BLOOMFIELD, NEW JERSEY.

BRAKE-SHOE FOR RAILWAY-CARS.

SPEGIFICATIQN' forming part of Letters Patent No. 578,427, dated March 9, 1897.

Application filed September 4, 1896. Serial No. 604,854. (No model.)

Be it known that 1, CHARLES T. STEWART, a citizen of the United States, and a resident of Bloomfield, in the county of Essex and State of New Jersey, have invented certain new and useful lmprovem cuts in Brake-Shoes for Railway-Oars, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof, in which similar numerals of reference indicate corresponding parts wherever found throughout the several views.

This invention relates to brake-shoes for railway-cars, tramway-cars, and other and are required; and the object of the invention is to provide a brake-shoe of the desired form, the body portion of which is composed of cast metal, iron being preferred, and the bearing portions of which are provided with transverse bores, passages, or openings, in which are placed and keyed plugs of hard metal, such as chilled iron or chilled steel, and which are designed to prevent the rapid wearing away of the shoe and to give much longer life thereto.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which-- Figure 1 is a perspective view of a brakeshoe of ordinary form provided with my improvement or made according to my invention; Fig. 2, a section thereof on the line 2 2, and Fig. 3 a perspective view of one of the plugs which I employ.

My improvement, as hereinbefore stated, is applicable to brake-shoes of any form, but in the drawings forming part of this specificausual form and construction, which consists of a body portion 6, which is segmental or curved in form, and which is provided at one side with a backwardly-directed segmental or curved flange or projection 7, in which is formed a corresponding groove 8, and the body portion 6 of the shoe is designed to bear upon the main bearing-surface of a car-wheel in the usual manner, while the rim of the carwheel fits in the groove 8.

The shoe is cast in the usual manner, and the body thereof is preferably composed of or hardness, and in casting the shoe I form therein transverse bores, passages, or openings 9, which are conical in form, the larger end thereof being directed inwardly, and into these transverse bores, passages,or openings are inserted conical plugs 10, each of which is provided at one side thereof with a longitudinal groove 11, which is semicircular in cross-section, and the inner end of which is much larger than the outer end, and formed in the body of 'the shoe adjacent to each of the transverse bores, passages, or openings 9 is a similar groove 12, and when the plugs 10 are inserted into the shoe, as shown in Figs. 1 and 2, the grooves 11 and 12, as taken togeth er, form a conical passage through which is passed a key-plug 13, one of which is employed in connection with each of the plugs 10.

The key-plugs 11 are longer than the plugs 10, and when driven into place, as shown in Fig. 2, the smaller end thereof projects through the body of the shoe, as shown at 14, and is riveted down, as shown at 15, and when this operation is performed it will be impos sible to remove the plugs 10, the shape of the key-plug prohibiting said plugs 10 from being driven inwardly, and the conical form of the plugs 10 preventing them from being driven outwardly. In practice I also prefer to provide the back of the curved or segmental flange or projection 7 with transverse openings, passages, or bores 9, similar to those formed in the body of the shoe, and to place therein the plugs 10, as hereinbefore described, this operation preventing the wearing of the segmental flange or projection 7, in which the groove v8 is formed in the manner hereinbefore described with reference to the plugs 10 in the body portion of the shoe.

It will be understood that the plugs 10 may be secured in the body portion of the shoe in anydesired manner, and any preferred number thereof may be employed, and although I have shown said plugs arranged in a horizontal line this form of arrangement is not essential, and two or more lines may be employed, or they may be arranged in diagonal lines or in transverse lines. 7

The plugs 10 are composed of hard chilled iron or steel and are designed to prevent the wearing away of the shoe, and being mounted in an ordinary soft or cast iron shoe the danger of breaking the latter is not in any way increased, and the life of the shoe may be prolonged to a great extent beyond that of a brake-shoe as usually constructed, and in practice I also prefer to coat the plugs 10 with white lead or other suitable agents to prevent the same from becoming loose and also to eX- clude water and other fluids or gases from the holes or openings in which the plugs are placed.

Having fully described my invention I claim as new and desire to secure by Letters Patent- 1. A brake-shoe, the body portion of which is provided with conical transverse bores, passages or openings, the larger ends of which are directed inwardly, said brake-shoe being composed of cast-iron or similar material, and conical plugs which are composed of hard chilled iron or steel, which are keyed in said transverse bores, passages or openings, by means of conical key-plugs which are passed through corresponding openings formed in said conical plugs, and the body of the shoe, and the larger ends of which are directed inwardly,substantially as shown and described.

2. A brake-shoe of the usual form provided at one side with a segmental circular flange or rim in which is formed a corresponding groove which is adapted to receive the flange or rim of a car-wheel, the body of said brakeshoe, and the back of the segmental or circular flange or rim being provided with transverse bores or passages which are conical in form, and in which are inserted conical plugs of hard chilled iron or steel, said plugs being keyed in said bores or passages by means of conical key-plugs which are passed through corresponding openings formed in said conical plugs, and the material of the shoe, and the larger ends of which are directed inwardly, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 3d (lay of September, 1896.

w. w. HILL, C. GERST.

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