Electronic security device

Details Electronic security device Electronic security device

E - Fixed Constructions

05

B

340/125, 342/11.

E05B 47/00 (2006.01) E05B 49/00 (2006.01) G07C 9/00 (2006.01) G07F 7/12 (2006.01)

Patent

CA 1167131

ABSTRACT OF THE DISCLOSURE An electonic security device includes a memory and a card reader which reads a combination code and calculation data from a key card. An electronic circuit compares the content of the memory with the combination code and enables the lock device if a match is found. If the key card is a new one the circuit calculates a new combination code by applying the calculation data to the memory content and, if this new combination code mat- ches that on the key card the memory is loaded with the new combination code.

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