Alarm for detecting radiation and pollutants
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United States of America Patent
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-
Jan 27, 2009
Grant Date -
May 18, 2006
app pub date -
Jun 24, 2003
filing date -
Jun 24, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An alarm for detecting radiation and/or pollutants such as smoke, carbon monoxide or the like has a housing (500), an alarm circuit (400) including a detector (DET1) for detecting said radiation and/or pollutants, first electrical connections (PL1, PL2) connectable to an external power supply for supplying power to the alarm circuit, and a control circuit (300) responsive to receipt of a preselected number of pulses over a preselected time period to apply a preset control signal to the alarm circuit (400). The alarm circuit (400) is responsive to the preset control signal to reset or test the alarm in dependence on the preset control signal.
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