Door lock system with first and second sensors

Details Door lock system with first and second sensors Door lock system with first and second sensors

1992-03-19

1993-08-31

Nicholson, Eric K.

Closure fasteners

Bolts

Swinging

2923363, 200 6162, E05C 326

Patent

active

052402967

ABSTRACT:
A door lock system comprises a door latch device which has a locking-unlocking lever. The door latch device is locked and unlocked when the locking-unlocking lever assumes lock and unlock positions respectively. An electric actuator includes a reversible electric motor and a pivotal operation lever which is actuated by the electric motor. The operation lever is connected to the locking-unlocking lever in such a manner when the operation lever assumes locking and unlocking positions, the locking-unlocking lever assumes the lock and unlock positions respectively. A first device senses a theft protecting operation which causes the operation lever to pivot from the unlocking position to the locking position. A second device locks the operation lever at the locking position when the first device senses the theft protecting operation.

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patent: 4905528 (1990-03-01), Kawaguchi et al.
patent: 5072975 (1991-12-01), Hamada et al.

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