US99515A - Improved railway-brake shoe - Google Patents

Description

E. H. ZITZMAN.

Brake Shoe.

'Patented Feb. 11, |870.

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vaient @twine I EDWARD ILZITZMAN, 0E PHILADELPHIA, nPENNSYLVANIA7 AssIeNoE To ALBERT A. EBEE-MAN, oE SAME ELAoE.

Letters Patent No. 99,515, dated February 1, 1870.

IMPRQVED RAILWAY-BRAKE SHOE.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it 'may concern Be it known that'I, EDWARD H. ZITZMAN, of thecity and county of Philadelphia, and State of Pennsylvania, have invented a newfand useful Improvement in Brake-Shoes5 and I do hereby declare that the following is a full, clear, and exact description of` the construction and operation of saine, reference being had to the vaccompanying drawings, making a part ot' this specification, in which- Figure 1 is an edge view of a brake-shoe, with the sole att-ached.

Figure 2 is a side view of same.

Figure 3 is a sectional view, broken, of the lower part of same.

The object of my invention consists of a sit ple and effectual arrangement, whereby the sole is kept in contact-with the shoe, without the aid of bolts, keys, or springs, and at the same time prevents any lateralor longitudinal motion of the shoe when .the sole is applied to the tread of' a cai'fwlleel; also, by the peculiar construction, the shoe can be readily removed from the sole when it is desired to change it.

To enable those skilled in the art to make and use my invention, I will nowproceed to describe its construction andoperation. y

' lounite theshoe and sole together, I form oli the back and upper part of the sole S, a hook, H, made in the form as shown in the drawings. The said hook H passes thro-ugha rectangular opening, O, made in the upper part of the shoe B, and on the upper edge ofthe opening, an oval-shaped lng, F, is formed, which lits into the hook ,Hand holds the shoe B firmly against the sole S, and thus prevents all motion. On

the back, and near the lower end of the sole S, is cast or attached a circular lng, L, in the centre of which a wrought-iron stern, T, is secured. The said stem projects a short distance beyond the end of the lug L, and bears on it an' elliptical, or any suitable-shaped button, D. The button D 'is placed on the lug L, eccentric to it; and in order to retain it in place, and at thesame time to allow it to be turned in any direction, a conntersink is formed in the outer edge of the opening,

through which the stein T passes, and the end of it (the stem) is riveted into the countersink.

rlhe lower part of the shoe B, has formed through it, opposite the lug L, an opening, N., corresponding in shape to the button D.

In applying the shoe B to the sole S, the rectangular opening O in the shoe is placed over the hook H, and the lower end'of the shoe at the same time being pressed toward the sole, so that the butt-011 D is inserted through the opening O. The button is then turned, so that the projecting part will extend over and catch on the outside ot' the shoe B. In this position the shoe will be held, and cannot bec-ome'detached from the sole. When it is desired to remove the shoe, the button D is turned around, as shown by red lines, tig.`3, so that it will correspond with the opening N; the shoe lis then raised slightly, and slipped over the button D and hook H.

,In forming the opening N, the conjugate diameter should equal the diameter of the circular lng L, so that this part ofthe opening will tit the lug, and prevent all lateral motion. l

Having thus described my invention, its construction, and operation,

What I claim, and desire to secure by Letters Patelit ot the United States, is

The mode of attaching the shoe B to the sole S, by meansof the hook H, lug F, lug L, opening N, opening O, stem T, and button D, substantially in the manner and for the purpose specified.

In testimony whereof, I have hereunto `signed my name, in the presence otl two subscribing witnesses.

ED..` H. ZITZMAN.

Witnesses:

IsAAo It. OAKEOED, CHARLES H. EVANS.

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