Communications: electrical – Continuously variable indicating – With meter reading
Patent
1987-04-23
1988-05-10
Griffin, Robert L.
Communications: electrical
Continuously variable indicating
With meter reading
34082534, 235382, 2353825, G06F 704, G06K 701
Patent
active
047438983
ABSTRACT:
The present invention relates to a programmable electronic lock each constituted by an independent unit. It comprises a support of a card code and of a shift code which, after having been read, are temporarily stored in registers (5, 6) and transmitted to a computing means which also receives a system code of a register (9) of the lock, said computing means using the system code and the shift code of the register (6) as elements for conversion of the card code into key code which is stored in a register (16) supplying a comparator which also receives a lock code stored in a register (11) of the lock. The invention is more particularly applicable to the control of door locks.
REFERENCES:
patent: Re29259 (1977-06-01), Sabsay
patent: 3996450 (1976-12-01), Kerkhoff
patent: 4198619 (1980-04-01), Atalla
patent: 4207555 (1980-06-01), Trombly
patent: 4453074 (1984-06-01), Weinstein
Search Report, FR 84 01 855.
Griffin Robert L.
Smith Ralph E.
Talleres de Escoriaza S.A.
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