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Safety equipment for gas burner

  • US 4,125,356 A
  • Filed: 04/05/1977
  • Issued: 11/14/1978
  • Est. Priority Date: 04/15/1976
  • Status: Expired due to Term
First Claim
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1. A safety equipment for a gas burner comprising:

  • a combustion sensor having porous electrodes disposed on both sides of a sintered body of ion conductive solid electrolyte, one of said electrodes being exposed to an exhaust gas atmosphere of the burner while the other electrode being exposed to a gas atmosphere other than said exhaust gas atmosphere, said sensor generating an e.m.f. depending on a ratio of oxygen concentrations of said gas atmospheres, a resistance of said sensor changing with a temperature;

    an electromagnetic safety valve connected in a fuel supply path to said burner; and

    an electrical control circuit responsive to a change in the e.m.f. of said combustion sensor due to incomplete combustion of said burner and responsive to a change in the resistance of said sensor due to extinction of said burner, for controlling said electromagnetic safety valve.

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