Internal pilferage alarm
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United States of America Patent
Stats
-
Apr 24, 1990
Grant Date -
N/A
app pub date -
May 26, 1988
filing date -
May 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An alarm system for monitoring an entrance/exit from a premises is provided with a deadbolt switch, timing mechanism, alarm circuitry and an alarm indicator. The alarm system is activated when the deadbolt is unlocked. The alarm circuitry determines if the unlocking of the deadbolt was authorized or unauthorized. If the unlocking was unauthorized, the alarm indicator is activated. If the unlocking was authorized, the timing mechanism is activated. If the deadbolt is not relocked within the time period preset into the timing mechanism, the alarm indicator is activated. The timing mechanism may be reset by authorized persons to allow the deadbolt to remain open for additional time periods, one period at a time.
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Family
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Cited Art Landscape
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