Padlock with tamper-actuated audible and/or inaudible alarm
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United States of America Patent
Stats
-
Mar 14, 1989
Issued Date -
N/A
app pub date -
Jan 18, 1985
filing date -
Aug 18, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A padlock comprises a battery-powered, built-in alarm which operates when the padlock's shackle is severed or forced open. The battery and alarm can be tested by opening the lock with a key, rotating the short leg of the shackle away from the lock body and then depressing the shackle, or optionally, by depressing the short leg. The alarm is turned on in response to the momentary closing of a switch when one shackle leg moves outwardly upon severance or forcible opening. The alarm may be an audible signal or an inaudible signal transmitted as a radio wave to a remote receiver at which an audible or visible signal is actuated. The audible signal generated at the lock escapes from the lock body through sound ports. Both audible and inaudible signals may be generated at the lock simultaneously.
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