Group card-key actuated lock having individual lockout

Details Group card-key actuated lock having individual lockout Group card-key actuated lock having individual lockout

1985-09-10

1988-10-18

Gall, Lloyd A.

Locks

Operating mechanism

Using a powered device

294011, 70384, 70413, E05B 4700

Patent

active

047778156

ABSTRACT:
A number of bearers concurrently use card-keys, having a common access code, and a unique lockout code to open a single lock. If a particular bearer is to be selectively locked out, the lockout code sensing device in the lock is changed to lockout the particular bearer but not all other bearers concurrently using their card keys to open the same lock.

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patent: 3857262 (1974-12-01), Sidiropoulos
patent: 4149394 (1979-04-01), Sornes
patent: 4376382 (1983-03-01), Raymond et al.

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