United opening device for a double-locked door

Details United opening device for a double-locked door United opening device for a double-locked door

1986-10-28

1987-12-01

Wolfe, Robert L.

Locks

Special application

For closures

70118, 70481, E05B 5900

Patent

active

047095652

ABSTRACT:
An opening device for simultaneously opening two locks of a double-locked door fixed only at the inside of the door for simplifying the action of opening from the inside comprises a cam-operated sliding plate displaceable by a cam actuator on the shaft of the main lock-rotating handle which when displaced simultaneously rotates the shaft of the auxiliary lock by camming action to the unlocked position, but when opening the door from the outside the device does not unlock both locks simultaneously and the opening process requires two separate operations for preserving the anti-burglary features of a normal double-lock system.

REFERENCES:
patent: 3910613 (1975-10-01), Nolin
patent: 3990277 (1976-11-01), Mullich
patent: 3999789 (1976-12-01), Maurits
patent: 4129019 (1978-12-01), Urdal
patent: 4183563 (1980-01-01), Stevens
patent: 4418552 (1983-12-01), Nolin

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