Electronic security system

Details Electronic security system Electronic security system

1990-05-11

1992-08-18

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

235382, 70278, E05B 4900, G06K 500, G06F 704

Patent

active

051403170

ABSTRACT:
An electronic security system includes an electronic lock mechanism and an electronic key, each of which is provided with a microprocessor controller and a memory storing data including an ID code. The lock microprocessor changes the ID code stored in its memory upon the operation of the lock by a correct key. The key can only be used to operate the lock once, and thereafter must be reprogrammed by a host computer with the updated ID code for the lock. The electronic lock operates a solenoid which retracts a bolt blocking mechanism which prevents the unlocking of the bolt even when a key having the correct mechanical key cuts is inserted into the lock. Power for operating the electronic lock as well as the solenoid is provided by a power supply within the key.

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