Dead bolt lock accessory

Details Dead bolt lock accessory Dead bolt lock accessory

1979-05-14

1980-12-16

Wolfe, Robert L.

Locks

Operating mechanism

Key

70431, E05B 1300

Patent

active

042389437

ABSTRACT:
A device for mounting on the inside of doors employing a dead bolt lock to cause the lock to be opened from the outside with a key but only after turning the key to the right and to the left a given number of times. The advantage of this device is to provide a selected time delay in unlocking the door.

REFERENCES:
patent: 4064721 (1977-12-01), Morgan

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