Electric fail-secure/fail-open lock mechanism

Locks – Operating mechanism – Using a powered device

Patent

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Details

70129, E05B 4700

Patent

active

045571210

ABSTRACT:
An electric door lock is disclosed comprising an elongated housing for mounting in a door or frame member, a bolt slidably mounted in the housing for movement between a first position and a second position with the first position being a projected locking position and the second position being a retracted nonlocking position, a spring for normally urging the bolt towards one of the first and second positions, a solenoid for electrically actuating the bolt to the other of the first and second positions with the solenoid having a plunger element moveable from a first position to a second position, a connector assembly for connecting the plunger element to the bolt to move the bolt to the other of the first and second positions by movement of the plunger element to the second position, and a manually operative rotative assembly for mechanically moving the plunger element to the second position. Also disclosed is an automatically deadlatching door lock having a crank lever with first and second retaining surfaces to engage a locking bolt for deadlatching against an external driving force.

REFERENCES:
patent: 2763888 (1956-09-01), Billeter
patent: 2786701 (1957-03-01), Povlich
patent: 3893723 (1975-07-01), Boule
patent: 4099752 (1978-07-01), Geringer
patent: 4372419 (1983-02-01), Barnett

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