US74792A - Improved shoe foe cae-beakes - Google Patents

Description

JAMES BRAHN, 0E JEEsEYicITii NEW JERSEY.4

Latem Pam; Nartvee, dans February 25, 1868.;

IMPROVED SBOE FOR CAR-BRAKES.

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TO ALL WHOM IT MAY ONCERN:

Be it known that I, JAMES BRAHN, of Jersey City, in the county of Hudson, and State of New Jersey, have invented a new and useful Improvement in Attaching Shoes to Brake-Bars; an'dl do hereby declare that the following is n full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawingsnforming part of this specification.

This invention relates to a. new and improved manner of attaching shoes to the brakebars of railroad-cars, whereby the shoes may be readily attachedand detached, all bolts and screws being avoided, and the shoes, when attached, eiiectually prevented from being casually detached. The invention also. relates to a peculiar application of India. rubber to the shoes, wherebya requisite degree of elasticity is allowed the same, in order to prevent wear and tear. In the accompanying sheet of drawings* i Figure 1 is a. side view of my invention.

Figure 2, a rear view of the same.

Figure B, a sectionof-tiie same teken in the line :c z, iig. 2.

Similar letters of reference indicate corresponding parts.

A represents a. plate of cast iron, slightly concave at its outer or face side, and provided with two horizontal anges `or lips a a, which are cust with it, and project at right angles from its rear side. Between these anges or lips,l the brake-har (shown in red outline) is fitted and secured by one or more bolts. A plate, A, of this kind, is secured to each en d ofthe brake-bar in line with the car-wheels, (shown in red.) The upper and lower ends b b ofthe plate A are rounded, forming portions of a circle, the centre of which coincides with the centre of the plate. B represents a shoe, which longitudinally is of curved form, corresponding to the curvature of the tread ofthe car-wheel andthe plate A. This shoe B is cast with two lips or projections c c, at its rear side, which have concave inner surfaces to receive the endsof the plate A. These concave inner surfaces also form the part of a circle corresponding to that of the ends b b of plate A, so. that, in order to fit the shoe B to the plate, all that is required isjsimply to apply the shoe to the plate in an oblique position therewith, as shown in red dotted lines in fig. 2, and turn`the shoe, so that the ends of the plate A will pass into the sockets cc. This is all the fustening required to keep the shoe attached to the plate, for when the brake-bar is allowedtohang in the position designed for it in'practice, the shoe B will he prevented from turning by the Bange on the car-wheel. In order, therefore, to detach a. shoe, B, the brake-'bar must be pressed outward from the wheels, so that the shoe may clear the flange of the wheel, against the tread of which it presses when the brake is applied. The shoe may then be turned and detached from the plate.` C represents a piece of' India rubber, which is interposed between the shoe B and plate A. This rubber serves to keep the shoe firmly in position without play, and to admit of the shoe yielding to any irregularities on thetread of the wheel, thereby avoiding unnecessary wear and tear, and allowing the shoes, when necessary, to be more readily detached from the plates than they otherwise could be.

Having described my invention, I claim as new, and desire to secureby Letters Patent- 1. The shoe B, cast with sockets c, in combination with the plate A., formed with projections a, substantially as described, for the purpose specified.

2. In combination with theV above, I claim the rubber strip C, arranged substantially as and for the purpose set forth.

JAMES BRAEN.

Witnesses:

WM. F. MeNAMAnA, ALEX. F. RoBmTs.

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