US484620A

US484620A - Millxrd ephraim stockwell

Info

Publication number: US484620A
Authority: US
Publication date: 1892-10-18
Anticipated expiration: 1909-10-18

Description

(No Model.)

M. E. STOCKWBLL. AUTOMATIC GAR BRAKE.

N9, 484,620A Patented Oct. 18,1892.

UNITED STATESv PATENT OFFICE.

MILLARD EPHRAIM STOCKWELL, 0F GRAND RAPIDS, MICHIGAN, ASSIGNOR 0F ONE-HALF TO SEYMOUR W. PEREGRINE, OF SAME PLACE.

AUTOMATIC CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 484,620, dated October 18, 1892.

.To all whom it may concern:

Be it known that I, MILLARD EPHRAIM STooKWELL, a citizen of the United States of America, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Automatic Car-Brakes, of which the following is a specification.

My invention is an improvement in automatic brakes for street and railway cars; and its object is to provide a brake which shall be held out of contact with the wheels while there is any pull upon the draw-bar, but which will be applied to stop the car when this strain is removed.

The invention is illustrated in the accompanying drawings, in which- 4 Figure 1 is a side elevation of a truck and a section of a portion of a car embodying my invention.

In the drawings, 1 1 are the Wheels of the car, and 2 is a portion of the body thereof.

Secured to the bottom of the car and between the two adjacent wheels of the truck, upon each side, are the brackets 3, in which is journaled the shaft 4. This shaft is connected with the draw-bar 5, running the entire length beneath the car, by the short lever or extension 6. The brake-blocks 7 are suspended from the bottom of the car by chains or links 8, and are provided with the togglelevers 9, which are adjustable longitudinally The inner ends of these toggle-levers are pivotally secured to an extension 10, formed upon the lower end of the link 11, which is carried upon the shaft 4, and the upper end of this link is secured to the pressure-cap 12, formed with a flat under surface. The pressure-cap has a vertical sliding movement by a short rod 13, extending down from the under side of the car. A'coiled spring 14 surrounds this rod between the cap and the bottom of the car and tends to keep the cap and link forced downward and through the toggle-levers to keep the brake-blocks applied firmly to the wheels. A block l5 is rigidly secured to the shaft 4 beneath the dat under surface of the pressure-cap, and this block is formed with a fiat upper surface and rounded edges. When there is no pull upon the draw-bar in either direction, the pressure of the spring 14 upon the pressure-cap forces the link downward, and the brake is thus applied. When,

Figs.A

2, 3, and 4 are detail views.v

Application iiled'ebruary 4, 1892. SerialNo. 420,277. (No model.)

however, there is any draft upon the drawbar in pulling the carin either direction, the pull is imparted to the lever 6 to turn the shaft and with it the block 15, the rounded corners of which bear against the under face of the cap 12 and raise the saine against the pressure of the spring, thus drawing up the 6o link with the inner ends of the toggle-levers and releasing the blocks from contact with the wheels. Springs may be provided to keep the draw-bar in its normal position when there is no draft upon it. A stop o is provided on the draw-bar 5, which comes against the bar P'when the draw-bar is pulled out. This stop prevents the draw-bar from being pulled too far out.

A hand operating-lever may be used for 7o operating the brakes independent of the draft of the car.

I claim as my invention- 1. An automatic car-brake consisting of the blocks suspended from the car, toggle-levers connected with the blocks, a cap under springpressure connected with the toggle-levers, a shaft journaled beneath the car, a pressureblock rigidly mounted thereon beneath the pressure-cap, and a connection between the 8o shaft and draw-bar, whereby the pull upon the draw-bar operates to rotate the shaft and pressure-block to raise the cap andjrelease the brake.

2. In combination, the brake-blocks, the toggle-levers, a press`urecap on a rod carried by the car-body, a spring for forcing the cap downward, a link connection between the cap andlevers, a shaft journaled beneath the car, having a block rigidly secured thereto be- 9o neath the cap, and a lever connection between the shaft and draw-bar.

3. In combination, the brake-blocks, the transverse shaft 4, the verticallymovable blocks 12, operated by said shaft and connected to the brake-blocks, the draw-bar connected to the shaft 4, and the hand-lever for operating the brakes independently of the draft of the car.

In testimony whereof I affix my signature in loo presence of two witnesses.

MILLARD EPHRAIM STOCKWELL.

Witnesses:

JOHN L. BUCHANAN, E. J. REUKER.