SECURITY SYSTEM INCLUDING PHOTOBEAM CARRYING STATUS INFORMATION
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United States of America Patent
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N/A
Issued Date -
Aug 5, 2010
app pub date -
Jan 30, 2009
filing date -
Jan 30, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A security method includes transmitting an optical beam from a battery-powered transmitter. The beam carries a tamper signal and/or a battery status signal. The beam is received at a receiver. A radio frequency signal is transmitted from the receiver to a controller. The radio frequency signal includes an alarm signal if there is an interruption of reception of the beam at the receiver. The radio frequency signal is dependent upon the tamper signal and/or battery status signal.
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