Electronical unlocking method and system

Details Electronical unlocking method and system Electronical unlocking method and system

1982-04-29

1984-06-19

Miller, Jr., George H.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

340543, 34082531, 307 10AT, 70278, E05B 4900

Patent

active

044555881

ABSTRACT:
An electronical locking/unlocking system by which a door can be unlocked when a single switch is depressed repeatedly by an operator in time with a musical rhythm which he knows or in accordance with a Morse-type code. The electronical locking/unlocking system according to the present invention comprises a single switch for generating a predetermined series of on-time interval and off-time interval signals, a first counting unit for counting the on-time intervals, a second counting unit for counting the off-time intervals, a memory unit for previously storing reference ratios of on-time intervals to off-time intervals, a calculating unit for dividing the counted on-time intervals by the counted off-time intervals, a comparating unit for comparing the calculated values with the reference values, a third counting unit for counting the number of accurate on/off ratios up to a predetermined number, and an unlocking actuator.

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