Electric fail-secure/fail-open lock mechanism
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United States of America Patent
Stats
-
Dec 10, 1985
Grant Date -
N/A
app pub date -
Aug 22, 1983
filing date -
Aug 22, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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