| 摘要 |
A lock housing is provided for mounting upon or in a door, but which may also be mounted upon or in a door frame. Latch and bolt bars disposed in side-by-side relation are supported from the housing for lengthwise extension and retraction relative thereto. A locking pawl is mounted on a shaft oscillatably supported in the housing and extending transversely of the inner ends of the latch and bolt bars and the pawl is swingable into and out of position behind the inner ends of the bars when the latter are in their extended positions. A first pair of solenoids are selectively operative on 12 volt D.C. and 110 or 12 volt A.C. current to shift the shaft to a position with the pawl in an unlocked position and the third solenoid is operative to shift the shaft to a position with the locking pawl in the locked position. Further, a doorknob construction is rotatably received through the housing and includes an operator mounted thereon for rotation therewith by means of a slip clutch for manually shifting the bolt and latch bars between their locked and unlocked positions, the latch bar being spring-biased toward its locked position.
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