Electronic combination lock with high security features

Communications: electrical – Continuously variable indicating – With meter reading

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Details

34182532, 341542, 341 35, 70278, G06F 704

Patent

active

058476563

ABSTRACT:
An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The lock also includes a security feature to disable the lock if the combination dial is stopped between dial rotations for a period of time which indicates dialing by an automatic dialer.

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patent: 5299436 (1994-04-01), Spitzer
"X-07: A Safe Lock that Operates Electronically", 2342 Locksmith Ledger International, No. 9 (Jul. 1991).

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