Lock for double doors

Details Lock for double doors Lock for double doors

1982-08-09

1984-09-11

Wolfe, Robert L.

Locks

Special application

For closures

70118, 70DIG42, 70DIG65, 70380, 292 37, 292DIG21, E05B 6500

Patent

active

044702760

ABSTRACT:
A lock for a pair of doors hung in a single door frame, usually an inner main door and an outer door which may be a storm door and usually includes glass or screen panels through which a caller may be observed and identified, the lock including a pair of bolts carried by the door frame and operable to be extended therefrom to engage sockets formed therefor respectively in the door edges to secure them against opening. The bolts are operated by a lock shaft carried in the door frame to unlock first the inner door, so that it may be opened to permit observation and identification of a caller, while the outer door remains locked, and then to unlock the outer door if desired, to permit ingress of the caller. The lock shaft may be operated from inside the doors by a manual lever, and from outside by a key mechanism.

REFERENCES:
patent: 1495820 (1924-05-01), Tierney
patent: 2381666 (1945-08-01), Hinton

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