Locking device for a door

Details Locking device for a door Locking device for a door

1974-04-09

1976-11-16

Love, John 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 31, 187 57, B66B 1320

Patent

active

039918580

ABSTRACT:
A locking device for a holding door on an elevator shaft including a barrier member that is interconnected to a locking arm, said locking arm being alternately engageable and disengageable with a stop means so that the barrier member can only be moved out of way of the holding door when the elevator is adjacent to the holding door.

REFERENCES:
patent: 671878 (1901-04-01), Coyle
patent: 1595559 (1926-08-01), McLauthlin
patent: 1598678 (1926-09-01), Dunlop
patent: 1835544 (1931-12-01), Werner
patent: 1979022 (1934-10-01), Borden et al.
patent: 2484679 (1949-10-01), Borden
patent: 3659677 (1972-05-01), Shalders
patent: 3721319 (1973-03-01), Hall et al.

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