US28098A

US28098A - Car-brake

Info

Publication number: US28098A
Authority: US
Publication date: 1860-05-01
Anticipated expiration: 1877-05-01

Description

H. A. MEARS.

Car Brake.

Patented May 1, 1860.

Inventor. fw( mw' Witnesses: i

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AM. PHDTO'LITHUJIO. NfY-(OSBORNES PROCESS.)

UNITED STATES PATENT OFFICE.

H. A. MEABS, OF PEGA'IONICA, ILLINOIS.

CAR-BRAKE.

Specification of Letters Patent No. 28,098, dated May 1, 1860.

T 0 all whom it may concern:

Be it known that I, H. A. MEARS, of Pecatonica, in the county of Tinnebago and State of Illinois, have invented a new and Improved Car-Brake; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, making a part of this specifica-tion, in which- Figure l represents a longitudinal vertical section of my invention, the line m, a?, Fig. 2 indicating the plane of section. Fig. 2 is a plan or top view of ditto.

Similar letters of reference indicate cor responding parts in both views.

This invention consists in arranging a sliding frame with two friction wheels to act on the opposite side of a corresponding friction wheel, secured to the axle of one pair of wheels in such relation to the brakes, as well as to the bumpers, that on slackening the speed of the engine the momentum of the cars causes the sliding frame to be pushed up against the friction wheel on the axle whereby the brakes are applied; and it consists also in arranging the friction wheels in the sliding frame, in combination with ratchet wheels and pawls in such a manner that an application of the brakes in the wrong direction is prevented as will be hereinafter more fully explained.

To enable those skilled in the art to make and use my invention I will proceed to describe its construction and operation with reference to the drawing.

A is the frame of a railroad car, or of a portion of the same, constructed in the usual manner and supported by four wheels B, B', which are secured to axles C, C. The cross timbers a, of the frame A, are connected by the longitudinal side timbers Z), and by the additional central longitudinal timbers 0*, which latter form the guides for a sliding frame D. This frame is constructed of sheet metal and it extends on either side to about equal distances from the axle C. The sides of the frame D, form the bearings for two arbors c, c, which bear the friction wheels d, cl', and a similar friction wheel di?. is secured to the axle C, of the wheels B. The friction wheels (I, d', are placed loosely on the arbors c, 0, and spring pawls c, which are secured to the sides of said friction wheels and which gear into ratchet wheels f, f', placed firmly on the arbors c, c', cause said arbors to move with the wheels in one direction while they allow an independent motion of the friction wheels in the other direction. means of 'chains g, with a lever E, which is attached to the brake heads F, F', by means of rods 7L, 12,. The chains g, extend over a guide roller Gr, that serves to direct their ends to the arbors c, c.

The sliding frame D, is operated by a rod e', connecting with a lever H, that connects with the bumper at the back end of the car. The rod z', passes freely through the end of the sliding frame D, and it is furnished with two shoulders j, j, leaving to the rod a certain amount of play in a longitudinal direction, and spiral springs la, c, are interposed between said shoulders and the frame so that a sudden motion of the rod in one direction or in the other causes a gradual motion of the sliding frame thereby preventing a sudden application of brakes.

The operation is as follows: The train is supposed to move in the direction of arrow 1, and the top end of the lever I-I, on the rear end of each car connects with the bumper of the next succeeding car. If the speed of the engine is slackened, the momentum of each car causes the top end of the lever H, of the next preceding car to move in the direction of the arrow marked near it. By this motion the sliding frame is drawn in the direction of arrow 2, and the friction wheel d, is forced up against the friction wheel d, on the axle C. By these means the friction wheel d', is caused to rotate in the direction of the arrow marked on it, and in moving in this direction the pawl on the side of said friction wheel causes the arbor c', to partake of this motion. The chain g, therefore winds u on said arbor, and the brakes are applie to both pairs of wheels simultaneously, and with considerable power. As soon as the pressure on the lever H, ceases, the sliding frame D, is allowed to recede whereby the contact between the surfaces of the friction wheels cZ, and fl, is interrupted and the brakes are allowed to fall back from the wheels. When the speed of the engine increases again the top of the lever H, is thrown in the direction opposite to the arrow marked near the same in Fig. 1. The friction wheel cl, is thereby forced up against the friction wheel di, on the axle C, and it is rotated in the direction of the arrow marked thereon in Fig. l. In moving said The arbors c, c, connect byl by Letters Patent, is

1. The arrangement of the sliding frame xD, With the friction Wheels d, d', in combination With the friction Wheel d, chains g, and brakes F, F', constructed and operating substantially in the manner and for the purpose set forth.

2. The combination of the pawls e, and ratchet Wheels f, f, with the friction Wheels d, d, cZ*, arranged in the manner and for the purposeV set forth.

` H. A. MEARS.

Witnesses: Y

A. S. VAN DYKE, ANDREW AINSWORTH.