Locks – Operating mechanism – Combination
Patent
1980-10-01
1982-08-31
Wolfe, Robert L.
Locks
Operating mechanism
Combination
70298, E05B 3700
Patent
active
043465749
ABSTRACT:
A mechanical lock device dispensing with a key capable of unlocking a dead bolt from outside the room when pushbuttons of a number r out of a total number of n are depressed and a locking and unlocking bar of a lock unit and a locking and unlocking member connected thereto are rendered rotatable. The locking and unlocking member is fitted in a control slider. In the control slider, there is disposed a control pin which controls the transmission of the sliding movement of an intermediate slider to the dead bolt. The intermediate slider can be operated by turning a grip. The control pin is controlled by a sub-control slider. In the lock unit, there are disposed two sliding plates which can be carried in accordance with the movement of a permutation driving plate.
In the standby position, one of the sliding plates is carried by the permutation driven plate and the non-stop portion of the sliding plate is in a position shifted in its movement direction by one stage distance from the locking and unlocking bar, while the other sliding plate is carried by the permutation start plate and its non-stop portion is shifted by one stage from the locking and unlocking bar.
REFERENCES:
patent: 4087995 (1978-05-01), Guireud
patent: 4274272 (1981-06-01), Wang
Nakamura Hisako
Nakamura Katori
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