Electronic combination lock security system

Details Electronic combination lock security system Electronic combination lock security system

1994-07-26

1996-07-30

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

70283, 70285, 70278, H04Q 100

Patent

active

055415814

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 and encryption key codes. The lock microprocessor may either change ID codes stored in its memory or encrypt a seed number to be used for determining access to the lock. A novel combination dial electronic lock utilizes the electronic lock and key in association with a conventional combination lock dial to prevent rotation of the combination dial unless an authorized electronic key has been inserted into the electronic lock.

REFERENCES:
patent: 2916906 (1959-12-01), Miller
patent: 3455125 (1969-07-01), Silva
patent: 4671088 (1987-06-01), Jeang
patent: 4774512 (1988-09-01), Jolidon
patent: 4789859 (1988-12-01), Clarkson
patent: 4793165 (1988-12-01), Rochman
patent: 4831851 (1989-05-01), Larson
patent: 4904984 (1990-02-01), Gartner et al.
patent: 5140317 (1992-08-01), Hyatt

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