Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Fred Grow0
Date of Patent
August 8, 2006
0Patent Application Number
107759250
Date Filed
February 10, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A flame detector and burner fuel valve control has an ultraviolet sensitive, cold cathode, gas discharge tube in a DC quench circuit. In the presence of a flame, the circuit generates a pulse signal at a frequency related to the intensity of radiation from the flame. The pulse signal from a contaminated tube is at a higher frequency. A frequency discriminator circuit distinguishes between a flame responsive signal and a contaminated tube signal and controls the burner fuel valve.
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