Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Stuart Hart0
Nicholas Alexander Rutter0
Date of Patent
January 27, 2009
Patent Application Number
10518919
Date Filed
June 24, 2003
Patent Primary Examiner
Patent 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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