Electronic combination lock and system

Details Electronic combination lock and system Electronic combination lock and system

E - Fixed Constructions

05

B

351/1, 342/6.4,

E05B 49/02 (2006.01) G06K 7/08 (2006.01) G06K 19/06 (2006.01) G07C 9/00 (2006.01)

Patent

CA 1071769

ABSTRACT A unitary self-contained electronic combination lock is provided which includes a dead bolt manually op- erable from one side and operable from the other side only in response to insertion of a data combination card carrying a unique binary code in the form of selectively positioned metallic spots. Sensors located within the unit generate a binary "1" or "0" signal in response to the presence or absence of a metallic spot adjacent each sensor. The lock combination code is automatically changed to the data card's code upon insertion of a card having a code combination which includes part of the lock's code so that the pre- viously issued cards will no longer operate to unlock the door, In this manner, the authorized code for each lock unit is automatically and independently changed to render inoperative all previously issued data cards.

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