US681045A - Air-brake. - Google Patents

Description

No. 68I,045. Patented Aug. 20, |90I.

G w. evaluaron.

AIR BRAKE.

(Application led Nov. 21, 1900.)

(No llodsl.)

1n: Noam Penas co. Pnomuma., nlm-mm. u. c.

` sectional side elevation of the same.

UNITE nrns GEORGE W. EDGINGTON, OF OOALVILLE, UTAI-I.

AIR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 681,045, dated August 20, 1901.

Application led November Z1, 1900. Serial No. 37,195. (No model.)

To @ZZ whom t may concern:

Beit known that I, GEORGE W. EDGINGTON, a citizen of the United States, and a resident of Coalville, in the county of Summit and State of Utah, have invented a new and Improved Air-Brake, of which the following is a full, clear, and exact description. A

The invention relates to flnid-pressure brakes of the Westinghouse and other types; and its object is to provide certain new and useful improvements in fluid-pressure brakes whereby the brakes are instantly set when the truck-wheels leave the rails.

The invention consists of novel features and parts and combinations of the same, as Will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is representedmin the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

-Figure l is an end elevation of a car equipped with my improvement, parts being shown in section. Fig. 2 is a longitudinal Fig. 3 is an enlarged side elevation of the air-discharge valve, and Fig. 4; is a transverse section of the same on the line 4: 4 in Fig. 3.

The train-pipe A of a iiuid-pressure brake of any approved construction is secured in the usual manner to the under side of a carbody B, and `in saidtrain-pipe is arranged an air-discharge valve C, having its valve O' in the form of'a disk and normally held to its l seat by a spring O2, as plainly illustrated in Fig. 3, so that the air-valve is normally closed. The under side of the valve O is adapted to be engaged by a cam D on a lever D, fulcrumed at D2 on the bottom of the valve-casing, and the lever-arm D3 of said cam-lever extends transversely through an elongated opening E in an arm E, rigidly secured to a member of the truck B. As previously stated, the valve C' is held to its seat by the Spring C2 during the ordinary running of the car, so that the engineerA can apply and release the brakes in the usual manner. When the truck, however, runs 0E the rails and assumes an angularposition relatively to the car-body B, then the fixed arm E imparts a swinging motion to the cam-lever D, so that the cam end D thereof lifts the valveAO off its seat and opens the air-discharge valve to the outer air, and thereby allows escape of air from the trainpipe. As soon as this takes place the brakes are set in the usual manner, and consequently the derailed car instantly comes to a standstill.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. An air-brake havingatrain-pipe secured to a car-body, an air-discharge Valve on the train-pipe and normally closed, a cam-lever pivoted at one end and adapted to engage the valve to open it when moved from its normal position, and a iixed arm with which the cam-lever is loosely connected, substantially as described.

2. An air-brake havinga train-pipe secured to a car-body, an air-discharge valve on said train-pipe and normally closed, and a device controlled by the car-truck, to open said valve and allow escape of air from the trainpipe to set the brake, said device comprising a cam-lever fulcrumed at one end on said valve-body and adapted to lift the valve oi its seat, and an arm fixed to the car-truck and having an elongated opening through which extends the arm of said cam-lever, as set forth.

3. In an air-brake, the combination with a train-pipe, a valve-casing thereon, and a spring-pressed valve in said casing, of a camlever pivoted at one end to the valve-casing

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