US1484787A - Brake shoe - Google Patents

Description

1 Feb. 26, 1924;

Jase ah J far/".

Patented Feb. 26, 1924.

entree stares JOSEPH J. KARE, OF LINNTON, OREGON.

BRAKE SHOE.

Application filed December 6, 1921. Serial No. 520,372.

To all whom it may concern:

Be it known that I, J osnrn J. KARR, a citizen of the United States, residing at Linnton, in the county of Multnomah and State of Oregon, have invented new and useful Improvements in Brake Shoes, of which the following is a specification.

This invention relates tobrake shoe structures and the method of making the same.

An object of th present invention is the provision of a composite brake shoe which includes a maximum amount of wearing qualities and for this purpose comprises a molded metal body and a malleable (preferably steel) backing or reinforcing plate, arranged so as to provide a maximum degree of strength and permit of the wearing away of practically all of the cast body Without danger of breaking.

With the above and other objects in View, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings Figure 1 is a side elevation of a brake shoe constructed in accordance with the invention.

Figure 2 is a back view of the same.

Figure 3 is a. section on the line 33 of Figure 1.

Figure 4 is a similar view on the line H of Figure 1.

Figure 5 is a longitudinal sectional view on the line 55 of Figure 2.

Figure 6 is a detail perspective view of the backing or reinforcing plate.

Figure 7 is a detail perspective view of the eye.

Referring in detail to the drawings. wherein like characters of reference denote corresponding parts, the improved shoe is made up of a backing or reinforcing plate 10 which is preferably formed of malleable steel and is transversely crowned to provide a substantially U-shaped member having outwardly fl'ared side walls. As shown in Figures 3 and 4 the side walls of the intermediate or central portion of the plate 10 have a greater flare than the end portions. The plate 10 is formed throughout its length with spaced openings 11 and is provided on its opposite side walls with slots 12 for the reception of the inturned ends 13 of a substantially U-shaped member 14, the latter forming the eye for the shoe. The plate 10 is also longitudinally crowned so that its highest point is located centrally as shown at 16. i

In making the shoe, the plate 10 is inserted within a suitable mold and the shoe body which is indicated at 17 is formed by molding the same around the plate so that the longitudinal edges 18 of the plate are embedded in the body with the molded metal filling the channel formed by the transverse crown plate. The openings 11 are filled with the molded metal of the body, while the extremities of the plate are molded within lugs 19 formed at each end of the body with the extremities of the plate flush with the rear edge of these lugs. The intermediate portion of the plate 10 is flush -with the intermediate portion of the shoe body and the opposite side members of the U-shaped eye 14: are molded within lugs 20 which are formed integral with and extend from the back of the body.

The process of placing the crowned steel back in a mold and pouring the hot iron into the same has a tendency to anneal or soften that portion of the crowned back which is embedded in the main body of the shoe to about the same texture or sOftneSs as the cast iron so that a perfect joint between the back and shoe is provided. In case the brake shoe is Worn to the embedded portion of the back, the contact of the steel upon a wheel would be the same as that of cast iron. It will be therefore seen that there is no danger of the embedded steel wearing the wheel any more than the c'ast iron body. It permits the brake shoe being worn to a greater degree with safety and reduces materially the amount of waste due to discarded shoes.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as proper- 1y fall within the scope of the appended arm.

the back of the bod and'a substantially reotangular loop mol ed in the body with its 10 upper surface flush with the upper face of the lug and having its ends engaged with the bowed plate.

In testimony whereof I afiix my signature.

JosiiPH J. KARE.

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