Electronic security lock

Details Electronic security lock Electronic security lock

1988-10-19

1990-11-20

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082531, 70278, 361172, G08B 500

Patent

active

049721828

ABSTRACT:
An electronic door locking apparatus includes a key containing a first memory for storing a first code, and an electronic lock having a receptacle for receiving and reading the first code, a locking mechanism actuatable to a locking or unlocking condition, and a control system for controlling the locking mechanism in response to the insertion of a key into the receptacle. The control system includes a second memory for storing a second code, detectors for detecting whether the door is open or closed, a New-Code control member actuatable by the user when a new code is to be generated, and a Copy-Code control member actuable by the user when the code in the control system is to be copied into the memory of another key inserted into the receptacle.

REFERENCES:
patent: 3889501 (1975-06-01), Fort
patent: 4209782 (1980-06-01), Donath et al.
patent: 4392133 (1983-07-01), Lundgren
patent: 4558175 (1985-12-01), Genest et al.
patent: 4642631 (1987-02-01), Rak
patent: 4646080 (1987-02-01), Genest et al.
patent: 4677284 (1987-06-01), Genest
patent: 4712398 (1987-12-01), Clarkson et al.

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