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Burner ignition system

  • US 4,717,333 A
  • Filed: 01/17/1986
  • Issued: 01/05/1988
  • Est. Priority Date: 01/21/1983
  • Status: Expired due to Fees
First Claim
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1. A gas control in a gas burning system comprising a safety valve in series with a main gas valve and a pilot nozzle, the safety valve comprising a normally closed valve element for preventing gas flow to the main gas valve, a control chamber, means for increasing the pressure in the control chamber and valve control means responsive to increased pressure in the control chamber to open the valve element, the gas control further including a time delay orifice for venting the control chamber and flame responsive means for opening the main gas valve and terminating venting of the control chamber through the time delay orifice when a flame is sensed such that the safety valve closes after a predetermined delay if no flame is sensed.

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