Electronic locking devices

Details Electronic locking devices Electronic locking devices

1987-12-21

1989-07-25

Brigance, Gerald L.

Communications: electrical

Continuously variable indicating

With meter reading

70277, 2353825, H04Q 300, E05B 4900

Patent

active

048518280

ABSTRACT:
An electronic locking device which is particularly useful for safes in a hotel room comprises an unlocking circuit actuated when a code on a magnetic card which acts as the "key" is read by a card reader forming part of the device agrees with an unlocking code stored in the memory of the device. The unlocking code from the card is set in memory when the memory is enabled and the magnetic card is loaded into the card reader for a plurality of times within a relatively short pre-selected time interval.

REFERENCES:
patent: 4079605 (1978-03-01), Bartels
patent: 4213118 (1980-07-01), Genest et al.
patent: 4232353 (1980-11-01), Mosciatti et al.
patent: 4717816 (1988-01-01), Raymond et al.
patent: 4743898 (1988-05-01), Imedio

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