Lock set with self-contained door alarm and annunciator system
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United States of America Patent
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-
May 10, 1994
Grant Date -
N/A
app pub date -
Sep 10, 1992
filing date -
Sep 10, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A self-contained alarm/annunciator system for a door provides an alarm function and a flashing LED when the door is locked to deter attempted burglary, and an annunciator function operable when the door is unlocked to indicate attempted door opening.
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