US760968A - Brake. - Google Patents

Description

UNITED STATES Patented May 24, 1904.

PATENT OFFICE.

, JACOB D. DE PEVV, OF NEWPALTZ, NEW YORK, ASSIGNOR TO FREDERICK H. GREENE, OF NEWVPALTZ, NEW YORK.

with elongated openings 6 for the reception BRAKE.

SPECIFICATION forming part of Letters Patent No. 760,968, dated May 24, 1904.

Application filed October 21, 1903.

To all whom it may concern:

Be it known thatI, JAooB D. DE PEw, a citizen of the United States, residing at Newpal tz, in the county of Ulster and State of New York, have invented new and useful Improvements in Brakes, of which the following is a specification. I

My invention relates to brakes, and has for its primary object the production of a new and useful auxiliary or emergency brake which is adapted to be brought into commission when it is desired to stop a car very suddenly or when the primary brakes refuse to work.

A further object of the invention is to provide a simple and cheap yet durable and efficient brake of the above-stated character which will be positive in its action and composed of few parts so arranged as not to be liable to become inoperative.

With the above and other objects in view the invention consists of the construction, combination, and arrangement of parts hereinafter fully described, claimed, ,and illustrated in the accompanying drawings, which disclose the preferred form of my invention, and in which Figure 1 is a perspective view of one end of a car equipped with a brake constructed in accordance with my invention. Fig. 2 is a detail side elevation of a fragmentary portion of a car-Wheel and track, illustrating the brake in operative position.

Referring to the drawings by reference-numerals, 1 designates the plow of a car, and 2 the wheels thereof. Brackets 3 are secured to the under side of the car in parallel relation and preferably above and in longitudinal alinement with the axle-cap, in which the wheels are mounted. The brackets have their upper ends provided with horizontally disposed flanges 4, which are apertured to receive suitable fastening-means adapted to secure the brackets in applied position, in which position they are retained against accidental displacement by means of braces 5, each having one of its ends secured to the floor and its opposite end secured to one of the brackets. The lower ends of the brackets are provided ed to come into engagement therewith.

Serial No. 177,889. (No model.)

of bearing-blocks 7 These bearing-blocks are movably mounted within the openings and are yieldingly retained in their normal position in the lower portion of the openings by means of springs 6. A rock-shaft 9 is journaled in the bearing-blocks and has its ends bent right-angularly to provide arms 10,which have their extremities disposed a little in advance of the peripheries of the wheels. Brakeshoes 11 are secured to the extremities of the arms 10, and to prevent them from having any movement thereon the arms are provided with integrally-formed brace-rods 12, which have their extremities secured to the brakeshoes. brought into engagement with the rails a little in advance of the wheels, which are adaplt T 1e engagement of the brake-shoes and wheels stops the revolution of the wheels and forces the brake-shoes into frictional engagement with the rails to stop the movement of the car. The inner faces of the brake-shoes are curved to correspond to a portion of the peripheries of the wheelsto facilitate their engagement by the wheels, and their under sides are roughened to facilitate the gripping of the rails. The engagement of the brake-shoes by the wheels causes the latter to clear the rails, thereby providing a chance for the cars to slide laterally from the rails, and in order to obviate this I provide the under inner edges of the brake shoes with longitudinally-extending flanges 13, which are adapted to engage the inner edges of the rails. Chains 14, each having one of its ends secured to the floor 1 and its other end secured to the upper The'brake-shoes are adapted to be end of the brake-shoes, are adapted to prein the usual manner. A link 17 is pivotally secured to the crank 15 and is also connected to one end of a flexible connection 18, which passes over a pulley 19, secured to the under side of the floor. The flexible connection is secured to one end of a draft-bar 20, having its opposite end connected to a flexible connection 21, adapted to be wound around the staff .16 when the same is rotated to elevate the brake-shoes or to unwind therefrom when the staff is released to drop the brake-shoes into operative position. The brake-staff is provided with a ratchet-wheel 22, adapted to be engaged by a dog 23 to retain the brakeshoes elevated or out of operative position.

The operation of the brake may be described in the following manner: The brakeshoes being held out of operative position drop of their own gravity when the dog 23 is thrown out of engagement with the ratchetwheel 22. The dropping of the brake-shoes brings them into engagement with the rails a little in advance of the wheels which are adapted to engage their curved faces. The engagement of the shoes by the wheels brings the former into frictional engagement with the rails, consequently stopping the car. When it is desired to release the brakes, the staff 12 is caused to rotate, which rotation winds the connection 17 thereon and raises the shoes out of operative position, in which position they may be held by throwing the dog 19 into engagement with the ratchet-wheel.

The journaling of the rock-shaft in yielding bearing-blocks prevents the rock-shaft from being injured or the cars being jarred when the brake-shoes are thrown into engagement with the rails.

Having described my invention, what I claim is- 1. In a car-brake the combination with a car, of brackets secured thereto, a rock-shaft journaled on the brackets, brake-shoes carried by the shaft, chains limiting the downward movement of the shoes, a brake-shaft journaled on the car, a pulley, a flexible connection, having one of its ends secured to the Y staff, a draw-bar having one end connected to the flexible connection, another flexible connection connected to the draw-bar and passing over thepulley, and a link joining the shaft and last-mentioned flexible connection.

2. In a car-brake, the combination with a car, of brackets secured thereto, a rock-shaft journaled on the brackets and having its ends bent right-angularly to provide arms having brace-rods, brake-shoes secured to said arms and brace-rods, chains adapted to limit the downward movement of the shoes, a brakestaff journaled on the car, a pulley, a flexible connection having one of its ends secured to the staflf, a draw-bar having one end connected to the flexible connection, another flexible connection connected to the draw bar and passing over the pulley, and a link joining the shafts and last-mentioned connection.

3. In a car-brake, the combination with a car, of brackets secured thereto, a rock-shaft journaled on the brackets, brake-shoes carried by the shaft and provided with flanges, and means for raising and lowering the brakeshoes.

4. In a car-brake, the combination with a car; of brackets secured thereto, a rock-shaft yieldingly journaled on the brackets, brakeshoes carried by the shaft, and means for raising and lowering the brake-shoes.

5. In a car-brake, the combination with a car, of brackets .secured thereto, and provided with openings, bearing-blocks movably mounted in the openings, springs adapted to yielding] y mount the bearings in the openings, a rock-shaft journaled in the bearing-blocks, brake-shoes, carried by the shaft, and means for raising and lowering the brake-shoes.

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

JACOB D. DE PEW.

Witnesses:

EDWARD (J. ELMoRE, Or'ro B. 8011mm.

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