Elevator door interlocking apparatus

Details Elevator door interlocking apparatus Elevator door interlocking apparatus

1982-07-01

1984-11-20

Rolla, Joseph J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 61, B66B 100

Patent

active

044834209

ABSTRACT:
An elevator hatchway door interlocking mechanism. The interlocking mechanism includes a first latch member movably mounted in a housing in the elevator hatchway which engages with a second latch member mounted on the hatchway door. A first contact assembly mounted in the housing engages with a second contact assembly mounted on the door when the door is closed. A third contact assembly movably mounted in the housing and operatively connected to the first latch member engages with a fourth contact assembly mounted on the second latch member. The elevator car is prevented from moving until the door is closed, the first and second latch members have engaged each other, and both sets of electrical contacts are made. Additionally, a manually operable releasing tool is provided for emergency or service use.

REFERENCES:
patent: 929988 (1909-08-01), Shand
patent: 1495808 (1924-05-01), Schakel et al.
patent: 1835544 (1931-12-01), Werner
patent: 1979022 (1934-10-01), Borden et al.
patent: 2008665 (1935-07-01), Eisenbart
patent: 2280805 (1942-04-01), Dodd
patent: 2307542 (1942-03-01), Prince
patent: 2521965 (1950-09-01), Carta
patent: 2611840 (1952-09-01), Rogers
patent: 2918988 (1959-12-01), Green
patent: 3625312 (1971-12-01), Hutner

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