Locks – Operating mechanism – Key
Patent
1977-08-15
1978-09-05
Wolfe, Robert L.
Locks
Operating mechanism
Key
70387, 70364A, 70384, E05B 2100
Patent
active
041110188
ABSTRACT:
The specification describes a lock and coded key for operating the lock. The lock comprises a housing having a keyhole, a rotatable actuating member, a locking mechanism provided with a lockable portion moveable from a locking position to an unlocking position, first locking means, second locking means, a pusher member for pushing the key into contact with the first locking means, and a locking member. The lockable portion is normally held in the locking position by the first locking means. The second locking means is normally in a release position but is arranged so as to lock the lockable portion in its locking position when a key bearing an incorrect code is inserted in the lock. The key is coded to move the first locking means to a release position without disturbing the second locking means. The lockable portion is tensioned to move to the unlocking position when both the first and second locking means are in a release position. The actuating member is adapted to operate the locking member when the lockable portion is in its unlocking position. The actuating member is also adapted to return the lockable portion to its locking position.
REFERENCES:
patent: 2656707 (1953-10-01), Nilsson
patent: 3599455 (1971-08-01), Pilvet
patent: 3654783 (1972-04-01), Sinclair
patent: 3780548 (1973-12-01), Anastasov
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