US517871A - William lawrence - Google Patents

Description

(No Mo'del.) 1 lK' W. LAWRENCE.

GAR. BRAKE MEGHANISM.- 110.517,871. i Patented Apr. 10,1894.

Q 5 o O v Q v@ f w @.NN

UNITED STATES PATENT OFFICE.

WILLIAM LAWRENCE, oF NEW YORK, N. Y., AssIGNoR lTo THE LAWRENCE ELECTRIC COMPANY, E SAME PLACE.

CAR-BRAKE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 517,871, dated April 10, 1894.

Original application filed January 21. v1893, Serial No. 459,134. Divided and this application iiled August 2, 1893- Serial No.

482,157. (No model.)

.To all whom it may concern-.-

Be it known that I, WILLIAM LAWRENCE, a citizen of the United States, residing at New York, in the county and State of New York,

have inventedcertain new anduseful Irnprovements in Brake Mechanism, of which the following is a full, clear, and exact specification.

This application is a division of my former 1o application, Serial No. 459,134, filed January 2l, 1893, and the object of my invention is to provide an improved brake mechanism, especially adapted for use on electric and other cars, and the invention consists in the novel details of improvement and the combinations'.

of parts that will be more fully hereinafter set forth, and then pointed out in the claims.

Reference is to be had to the accompanying drawings forming part hereof, wherein- 2o Figure 1 is a plan view of my improved brake mechanism. Fig. 2 is a side elevation thereof. Fig. 3 is a central longitudinal section of the drum and shoulder showing clearly the socket and tapered end of the drum.

z 5 In the drawings, the numeral 1 indicates a suitable shaft or axlehaving a shoulder 2. One face of this shoulder is preferably socketed and receives a tapered end of adrum or sleeve 3 fitted to slide on shaft or `axle 1, this 3o drum and shoulder thus forming a friction clutch. The shaft 1, can freely rotate Within the drum or sleeve 3 when the latter is not pressed against the shoulder 2.

4 is a ring or shoulder on shaft 1, said ring having a groove 5 on its outer surface, said ring being placed contiguous to the drum 3. The forked end 6 of a lever 7 enters the groove 5 in ring 4, said lever being pivotally secured on a plate or support 8 suitably carried by a 4o car body or truck (not shown). The lever 7 is provided at or near its outer or opposite end with an inclined shoulder or extension 9, which shoulder 9 is adapted to engage or bear on a wheel or projection 10, carried byfa sliding bar 11, guided in keepers 12 on plate 8.

The sliding bar 11 is connected with an arm or crank 13, on a shaft 14, suitably carried b v a car frame or truck (not shown). 15 is a rod extending longitudinally of the car and piv- 5o otally connected by an arm or crank 16 with rock shaft 14. The ends of rod 15 are pivotally connected with leveis17, pivoted at 18 to the platform 19, or other suitable partsof a car body. It will be seen that the said sliding bar 11 can be moved in either direction 5 5 without changing the movement of the lever at either end of the car.

From the foregoing it will be understood that when the rod 15 is moved longitudinally the shaft 14 will be rocked, thereby actuating the crank 13 and sliding bar 11, whereby the Wheel or projection 10 will` be brought into engagement with the incline 9 on lever 7, causing said lever to be moved outwardly, when the forked end 6 will be moved inwardly, 65 pressing the drum or sleeve 3 toward the shoulder 2, and causing the tapered end of Said drum to engage in the socket or shoulder 2, thus acting as a friction clutch to cause the drum ,8 to turn with shaft 1.

A chain, or its equivalent, 20, is attached at one end to the drum or sleeve 3, and at its other end is suitably connected with any desired brake shoe mechanism. When the tapered end of the drum or sleeve 3 is brought 75 into contact with the socket in shoulder 2, as before stated, the chain 2O will be wound around and upon said drum, which will serve to draw the other end of said .chain to apply the brake shoes to the wheels (not shown).

The bar 11 and wheel 10 could be dispensed with and the lever 7 connected by a chain 21 with the usual brake lever of an ordinary car.

Having now described my invention, what I claim, and desire to secure by Letters Patent is- 1. An improved brake mechanism consisting of a drum slidably and rotatably mounted on a shaft, a recessed shoulder mounted upon and secured to said shaft, the said drum having one end tapered and adapted to engage with the recess in said shoulder; a ring also mounted on the shaft and adapted to bear against the drum, the said ring having a groove on its outer surface to receive the forked end of a lever, the said lever being pivoted on a plate and having an inclined shoulder for engagementwith a wheel mounted in a slidable bar, the said lever adapted to be moved laterally by said wheel and bar, 10

thereby causing a friction between the drum and shoulder, substantially as and for the purpose set forth.

2. In a brake mechanism, the combination of a shaft, a clutch thereon, a lever to operate said clutch, a sliding bar, means between said lever and said bar for moving the former by the latter, a brake and connection between said brake and said clutch, for operating th latter, substantially as described.

3. In a brake mechanism the combination of a shaft, a clutch thereon, a lever to operate said clutch, a sliding bar, and means between said lever and said sliding bar for moving the former by the latter, said bar movable in either direction from either end of the car without changing the movement of the oper ating lever, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 25th day of July, 1893.

WILLIAM LAWRENCE. Witnesses:

MARK M. DECKER, JULIUS HINDFELL.

Images