Electronic proximity key and lock

Details Electronic proximity key and lock Electronic proximity key and lock

1986-08-14

1987-12-15

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082572, H04Q 100

Patent

active

047136600

ABSTRACT:
An electronic lock is actuatable by an electronic key. The key comprises a plurality of different resistive elements and a signal generator having a plurality of different timing periods. The key further has a signal transmitter. The electronic lock means comprises a lock and a signal receiver. The lock further has a comparator which includes a plurality of different resistive means. The comparator compares each consecutive timing period with the timing period determined by one of the resistive means. The lock further has an activating element for the lock in the event the consecutive timing periods of said signal match the timing periods determined by the plurality of resistive means.

REFERENCES:
patent: 3337992 (1967-08-01), Tolson
patent: 3428954 (1969-02-01), David
patent: 4072898 (1978-02-01), Hellman et al.
patent: 4143368 (1979-03-01), Route et al.

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