Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1991-01-30
1992-07-07
Lorence, Richard M.
Machine element or mechanism
Control lever and linkage systems
Hand operated
192 16, 192 95, 188 33, G05G 108
Patent
active
051272830
ABSTRACT:
A railway car brake mechanism is comprised of a hand wheel on a shaft and a housing with a rotatable gear wheel and square chain winding disposed within. A ratchet wheel rotatable with the hand wheel shaft and a freely rotatable pinion which engages the gear wheel is also provided. The rotatable pinion has a flange with a disengageable driving connection with the gear wheel and a disengageable connection between flange and ratchet wheel. The main gear wheel and chain winding drum comprise a main gear wheel assembly. The assembly is attached by a chain end link through an interconnection of the main gear wheel and outwardly extending section of the chain winding drum. To prevent kinking or slippage of the chain, a spiral groove is formed in the square chain drum. The groove enables the chain to be wound within the drum with alternate links seated on a concave surface and intermediate links, which rest on the outer surface of the drum, to be at right angles to the aforementioned alternate links. Further, a trip cam is utilized to rotate a trip bar. The bar disengages the driving connection and permits the pinion to freely rotate the main gear wheel to release the brake. Specifically, the trip cam has a shaft with both a cam arm and safety arm. With respect to the cam arm and shaft of the trip cam, the safety arm is located at a substantially 90 degree angle.
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George Rudi E.
O'Brien Raymond A.
Reczek Edward
Levi Benjamin
Lorence Richard M.
Ray James O.
Westinghouse Air Brake Company
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