Power and free trolley apparatus

Details Power and free trolley apparatus Power and free trolley apparatus

1977-09-27

1979-03-13

Makay, Albert J.

Railways

Traction

Chain

104103, B61B 1002

Patent

active

041435990

ABSTRACT:
Improved power and free trolley apparatus includes independent pusher and hold back dogs positively moved to an accumulate position by a counterweighted actuating lever moving to an accumulate position. The dogs, however, are self-biased, the pusher dog self-locking in its drive position, and the dogs are not interlocked with the lever. They move independently of the lever into operative position when the lever is moved into a non-actuating position and out of blocking relationship with the dogs. The actuating lever counterweight defines a trolley brake for preventing excessive trolley bounce back during accumulation. Another aspect of the invention includes a movable cam selectively raising a drive dog in a trailing trolley for switching, and permitting accumulation of trolleys through a switch zone when held in an inoperative position as when the switch zone is choked.

REFERENCES:
patent: 3044416 (1962-07-01), Reibel et al.
patent: 3397650 (1968-08-01), Kondur et al.
patent: 3420188 (1969-01-01), Dehne et al.
patent: 3874304 (1975-04-01), Robert
patent: 3882787 (1975-05-01), Turner

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