Remote reset safety control for gaseous fuel burners

Claim 1

IN A SAFETY SYSTEM FOR A MAIN BURNER AND ITS PILOT BURNER: AN IGNITION CIRCUIT FOR THE PILOT BURNER; SAID CIRCUIT INCLUDING A NORMALLY CLOSED CIRCUIT CONTROLLER OPERATED TO OPEN POSITION IN RESPONSE TO THE ESTABLISHMENT OF THE PILOT FLAME; AN ELECTRICALLY ENERGIZED VALVE FOR THE PILOT BURNER; MEANS RESPONSIVE TO HEAT DEMAND FOR OPENING THE PILOT BURNER VALVE AND FOR COMPLETING THE IGNITION CIRCUIT; MEANS FOR OPENING THE MAIN BURNER VALVE UPON ESTABLISHMENT OF THE PILOT FLAME; AND MEANS OPERATIVE AFTER A TIME DELAY, FOR RENDERING THE SYSTEM INEFFECTIVE EVEN WHILE THE DEMAND FOR HEAT CONTINUES, IN RESPONSE TO FAILURE OF THE PILOT FLAME, COMPRISING A FIRST BIMETAL MEMBER; A HEATER FOR THE MEMBER ENERGIZED UPON ENERGIZATION OF THE IGNITION CIRCUIT; A CIRCUIT CONTROL MEANS HAVING A PAIR OF COOPERATING CONTACTS, ONE CARRIED BY THE BIMETAL MEMBER; A SECOND BIMETAL MEMBER CARRYING THE OTHER CONTACT; A HEATER FOR THE SECOND BIMETAL MEMBER AND ENERGIZED ONLY WHEN THE PILOT FLAME IS ESTABLISHED; SAID BIMETAL MEMBERS BEING SO ARRANGED THAT THEY KEEP THE CONTACTS IN SUCH POSITION, WHEN BOTH HEATERS ARE ENERGIZED, THAT THE SYSTEM IS KEPT IN OPERATION; AND UPON FAILURE OF EITHER HEATER TO PRODUCE HEAT, THE SYSTEM IS RENDERED INACTIVE.