US472955A

US472955A - Car-brake shoe

Info

Publication number: US472955A
Authority: US
Publication date: 1892-04-12
Anticipated expiration: 1909-04-12

Description

G. SANDS.

- GAR BRAKE SHOE. No. 472,955.

Patented Apnl'Z, 1892.

lllllm 'UNITED STATES PATENT OFmCE.-

GEORGE SANDS, OF BEAVER FALLS, PENNSYLVANIA.

CAR-BRAKE SHOE.

SPECIFICATION forming part of Letters Patent No. 472,955, dated April 12, 1892.

Application led November '7, 1890. Serial No. 370,641. (No model.)

To all whom t may concern:

Be it known that' I, GEORGE SANDS, residing at Beaver Falls, Beaver county, Pennsylvania, have invented a new and Improved Railway-Car-Brake Shoe, of which thefollowing is a specification.

My invention relates to a combined wheel and rail brake, and has for its object to provide a brake of the character described which when applied to the wheel will be automatically forced down upon the rail, acting as a drag.

Rail-brakes as generally constructed have a tendency to lift the wheels from the track when the brakes are applied to the rails; but iny invention is designed to avoid this evil.

With such objects in view my invention consists of a brake-shoe movably held within a clog, said shoe being adapted to be moved down by the action of the wheel and drag on the rail when the brake is applied, said shoe being automatically returned as soon as the brake is released.

My invention consists, further, in certain details of construction and combination of parts, as will be more fully hereinafter described and claimed.

In the drawings forming apart of this specification, Figure l is a side view of a wheel with my brake arranged in connection therewith. Fig. 2 is a side view of the clog, and Fig. 3 is a view showing the interior of the clog. Fig. 4 is a vertical longitudinal section.

In carrying out my invention I arrange my improved brake upon the front side of the car-wheel K, the brake bar or beam and Vmeans for applying the same being of the usual or any approved pattern. The shoe D is of such length as to extend a considerable distance both above and below the center of the wheel, andthe face that bears. upon the wheel is grooved to receive the flange. The lower end of shoe is enlarged, as shown at ci, said enlarged end being adapted to bear upon the rail when the wheel is braked, as will be more fully explained hereinafter. The outer face of the shoe D is recessed or grooved, and in said recess is placed the clog F, said clog and shoe being connected by means of a set-screw C and Washer, the screw passing through the same, the clog being slotted at fi, in which the screw works, whereby the shoe is permitted to have a vertical movement. The inner face of the clog is recessed, as shown in Fig. 3, and in said recess, near the upper and lower ends of the same, are journaled the friction-rollers H H, said rollers bearing upon the outer face of the shoe D. A spiral spring M is secured at its lower end to the lower side of the recess in the clog, the upper end of said spring being' secured tothe under side of cross-bar B, formed in the recessed portion of the shoe D.Y The brake bar or beam is secured .to the outer face of the clog F in the usual manner.

In the construction as described, when the brake is lapplied the shoe will be pressed against the tread and Iiange of the wheel, and, being arranged in front of the wheel, the shoe will be carried down, as shown in dotted lines, the enlarged end or foot dragging on the rail and operating as a rail-brake at lthe same time it brakes the Wheel, and by reason of the position of the foot when down it can readily be seen it cannot derail the wheel, as is usually done with brakes now in use. The brakeshoe, extending a considerable distance above the center of the wheel, presents a large frictional surface and the wheel is braked more easily and the mechanism is not subject to the jerking so common with ordinary brakes.

The clog working in the recess of the shoe and the end of the clog and shoe being closed, dirt, &c., is prevented entering the same and impairin g the apparatus. If desired, the shoe D and clog F may be rigidly connected by removing washer and tightening-screw, in

which case the shoe will operate as an ordinary one, but with an exceptionally-large friction-surface, as shown by the dotted lines w w, the power being applied at p.

Having thus described my invention, what I claim isl. In a combined wheel and rail brake, the combination, with a sliding brake-shoe adapted to bear upon the wheel, the rear face of said shoe being recessed, of a stationary lclog arranged within the recess in the shoe, said clog being connected with the brake- IOC beam and upon which the shoe slides, substantially as shown and described.

2. In a combined Wheel and rail brake, the combination, with a stationary kclog having a longitudinal slot through Iche same and friction-rollers upon its inner face, of a shoe adapted to bear upon the Wheel and having its Vouter face recessed to receive the clog, a spiral spring arranged between the clog and shoe, and a screw passing through the shoe and Working in the slot in the clog, substantially as and for the purpose described.