Electronic lock

Details Electronic lock Electronic lock

1988-07-29

1992-02-18

Levy, Stuart S.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235382, 34082531, G06K 701, G06K 500

Patent

active

050896920

ABSTRACT:
The present invention relates to an individual electronic locking unit of the type which is re-coded to the code associated with a new key means and at the same time makes the previously used code invalid by the introduction of a new key means having a new code. For the purpose of obtaining a favorable solution including simplified data communication, it is according to the invention suggested that the locking unit is adapted to accept key means from a number (N) of mutually independent code sequences (C), only one key means from one of said code sequences (N.multidot.C) being valid at a time.

REFERENCES:
patent: 3845361 (1974-10-01), Watase et al.
patent: 4392133 (1983-07-01), Lundgren
patent: 4511946 (1985-04-01), McGahan
patent: 4519228 (1985-05-01), Sornes
patent: 4562343 (1985-12-01), Wiik et al.
patent: 4596985 (1986-06-01), Bongard et al.
patent: 4646080 (1987-02-01), Genest et al.
patent: 4717816 (1988-01-01), Raymond et al.

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