Elevator – industrial lift truck – or stationary lift for vehicle – With barrier for regulating access to load support – Including barrier mounted at landing
Patent
1994-04-06
1995-10-03
Terrell, William E.
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Including barrier mounted at landing
187336, 187340, B66B 1306
Patent
active
054544475
ABSTRACT:
An elevator hoistway door lock comprises a rod journaled for rotation on a hoistway door. A pin which extends laterally from the rod engages a lip when the rod is rotated into a locked position by means of its own weight, and optionally a spring. The pin clears the lip when the rod is rotated into an unlocked position by means of a retiring cam disposed on the elevator car. The electrical safety switch contacts are interconnected by a rotating contact disposed on the rod, only when the rod is rotated to place the pin in the locked position.
REFERENCES:
patent: 964891 (1910-07-01), Westlin
patent: 1679092 (1928-07-01), McCormick
patent: 1709970 (1929-04-01), Brubaker
patent: 1882621 (1932-10-01), Ives
patent: 4364454 (1982-12-01), Glaser et al.
patent: 5203431 (1993-04-01), Donohoe et al.
Ahigian Edward E.
Barrett David W.
He Thomas
Jaminet Jerome F.
Kowalczyk Thomas M.
Otis Elevator Company
Reichard Dean A.
Terrell William E.
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