Hand brake for railroad cars

B - Operations – Transporting – 61 – H

Patent

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188/57

B61H 13/02 (2006.01) B61H 13/04 (2006.01)

Patent

CA 1059452

HAND BRAKE FOR RAILROAD CARS Abstract of the Disclosure A hand brake for railroad cars comprising a housing including a front casing and a rear or back plate, between which an operating shaft is journaled (that bears the usual vertical hand wheel), and within which is mounted the brake drum in concentric relation to the operating shaft. A ratchet mechanism permits winding of the brake chain in one direction only, and the winding of the brake drum is through a non- rotating but gyrating pinion that meshes with a ring gear that is part of the drum, the pinion being actuated through an eccentric sleeve that is journaled for rotation about the operating shaft. The brake drum is journaled in concentric relation about the operating shaft on bearing plates res- pectively affixed to the housing front casing and back plate, with the housing back bearing plate having an integral annular flange in which the inner end of the operating shaft is jour- naled, and on which the eccentric is journaled. The ratchet mechanism is also disposed within the annular flange and is clutched to the shaft through friction clutch cooperation with a nut threaded on the shaft that is splined to a jaw clutch member that cooperates with jaw clutch seats or pockets in the eccentric whereby the operating shaft is releasably keyed to the eccentric to rotate the same for actuating the pinion for chain wind up purposes. The jaw clutch device involved also is operative to establish the friction clutch relationship that the nut has with the ratchet mechanism whereby the tension acting on the brake chain keeps the ratchet mechanism operative to prevent rotation of the shaft in a direction which would unwind the chain.

253739

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