US1227581A - Locomotive brake-shoe. - Google Patents

Description

J- v. c. T. CHRISTENSEN.

LOCOMOTIVE BRAKE SHOE.

APPLICATION FILED JAN. 27, I916.

. L%%5@L Patented May 29,1917.

JACOB V. G. T. CHRISTENSEN, 0F WICHITA FALLS, TEXAS.

LOCOMOTIVE BRAKE-SHOE.

Specification of Letters Patent.

Patented May 29, 1917.

Original application filed June 2, 1915, Serial No. 31,694.. Divided and this application filed January 27, 1916. Serial No. 74,670.

To all whom it may concern:

Be it known that I, J ACOB V. C. T. (hims- TENSEN, a citizen of the United States, residing at Wichita Falls, Texas, have invented certain new and useful Improve ments in Locomotive Brake-Shoes, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to brake shoes for car wheels and more particularly to a reinforced brake shoe of the M. C. B. type. The object of my invention is to provide a brake shoe of the above type that will be economical in use and capable of being economically manufactured in a small foundry without the installation of special and elaborate machinery, whereby they may be produced in various repair shops local to clifferent railroad centers.

Other objects of my invention will appear from a perusal of the following specification and the accompanying drawings.

The present application is a division of my prior application Serial No. 31,694, filed J une 2, 1915, for brake shoes.

My invention is illustrated in the accompanying drawings in which Figure 1 is a longitudinal section of a standard M. O. B. car brake shoe embodying my invention.

Fig. 2 is a bottom plan view of the shoe of Fig. 1.

Fig. 3 is a transverse section taken through the center of the shoe of Figs. 1 and 2.

Fig. 4 is a bottom plan view of the chills used in the car brake shoe.

Referring to Figs. 1 to 4 inclusive, these illustrate a standard form of M. C. B. car

brake shoe. In this form, the back stiffener tions 15 and 16 bent downwardly toward the lower outer edges of the shoe body. It will be seen that, here also, the particular shaping of the reinforcing member 12 pro vides both a broad anchorage for the lug and a reinforcing rib within the center of the brake shoe. Inserted in the bearing surface of the shoe are cast iron or steel chills l7 and 18, placed near each end of the wearing surface and so shaped as to present a broader contact surface toward the ends of the shoe than toward the center. These chills do not necessarily have to be of the shape shown but can be of any shape which will allow one end to be broader than the other, the broad end to be placed nearest the end of the shoe. This is done to equalize the wear on the surface of the shoe as when the brake shoes are not applied one of the ends of the shoe is likely to hang against the wheel causing increased wear at that end. These chills also are beveled or dovetail in cross section as shown'in Fig. 4 to prevent dislodgment due to various strains heretofore mentioned. It will be noted that by arranging the chills 17 and 18 in the shoe body in symmetrical relation, their surfaces will overlap on a longitudinal line so that their zones of contact with the rim of the wheel will overlap and thus prevent uneven wear of the wheel tread or rim. It will be also noted that the chills 17 and 18 are spaced apart from the central transverse line whereby the homogeneity of the central portion of the shoe is preserved.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. A brake shoe comprising a body portion of cast metal, a wrought iron stiffening rod embedded in said body portion and extending longitudinally thereof, a lug integral with the said body portion, and a re inforcing member embedded in the body and extending inwardly of the body portion beyond the said stiffening rod and outwardly toward the outer edges of the bearing surface of the shoe, said reinforcing member being wholly surrounded by the material of the body and lug.

2. A brake shoe comprising a body portion of cast metal, a longitudinal reinforcing member or back stiffener, secured integrally to the body in casting, a key lug also integral With the said body, and a cen- 5 tral transverse reinforcing member embed ded in said lug and body, extending inwardly of the body on opposite sides of said longitudinal reinforcing member, with its Ends spaced laterally away from said meni- In testimony whereof I aflix my signature. JACOB V. O. T. CHRISTENSEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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