Tamper indication system for combination locks
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United States of America Patent
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-
Nov 4, 1997
Grant Date -
N/A
app pub date -
Nov 25, 1996
filing date -
Jun 1, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A tamper indication system for use with combination locks can indicate or signal that unauthorized manipulation of one or more of the lock components has occurred. In one mode, the tamper indication system senses unauthorized retraction of the lock bolt. Unauthorized movement of the lock cover or combination dial can also be sensed. Sensing can be achieved by generating a mechanical action responsive to the unauthorized manipulation and converting the mechanical action into an electrical signal for sensing and indicating. The mechanical action can utilize a snap action motion generation system, non-contact means such as magnets or a spring biased switch.
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