System to detect lock tampering

Details System to detect lock tampering System to detect lock tampering

2008-07-08

2008-07-08

La, Anh V. (Department: 2612)

Communications: electrical

Selective

Intelligence comparison for controlling

C340S005600, C340S005740, C340S426160, C340S542000, C307S010200

Reexamination Certificate

active

11403479

ABSTRACT:
A lock and key system is configured to sense an operational signature generated by an object placed into a keyway in the system. The system is further configured to compare the operational signature with a reference signature, and to generate an alarm when the operational signature differs from the reference signature by a threshold.

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patent: 6608555 (2003-08-01), Chang
patent: 6675617 (2004-01-01), Stemmerik
patent: 6791456 (2004-09-01), Nakayama et al.

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