Key operated electronic lock

Details Key operated electronic lock Key operated electronic lock

1984-05-30

1986-10-14

Wolfe, Robert L.

Locks

Operating mechanism

Using a powered device

70278, 70413, E05B 4700

Patent

active

046164910

ABSTRACT:
A special type of key is made use of to actuate an electronically triggered release mechanism to unlock a door. To enable the electronic means to function, insertion of the key in the keyway initially closes a switch to energize the electronic circuit. Also when the key reaches the switch closing position, a read head for the electronic circuit, located adjacent the keyway, interprets magnetic coding carried by the key. The electronic circuit is programmed to motivate a motor driven mechanism to move a locking pin out of engagement with a latch bolt where the latch bolt has been acting to hold a door locked. Once the locking pin has been removed, the latch bolt is in fact withdrawn from its locked position by rotation of the key in a substantially normal fashion.

REFERENCES:
patent: 4399673 (1983-08-01), Gotanda
patent: 4414831 (1983-11-01), Perkjt
patent: 4507944 (1985-04-01), Widen

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