Ignition system for gas burners

Claim 1

AN IGNITION SYSTEM FOR A GAS BURNER, COMPRISING: A PILOT GAS BURNER; AN ELECTRICALLY OPERABLE PILOT GAS SUPPLY VALVE FOR SAID PILOT GAS BURNER HAVING ELECTRICAL ACTUATING MEANS; A MAIN GAS BURNER; AN ELECTRICALLY OPERABLE MAIN GAS SUPPLY VALVE FOR SAID MAIN GAS BURNER HAVING ELECTRICAL ACTUATING MEANS; A LOW-STORAGE-CAPACITY RECHARGEABLE BATTERY; AN ELECTRICAL IGNITER MEANS FOR SAID PILOT GAS BURNER OPERATIVE IN RESPONSE TO SUPPLY VOLTAGE APPLIED THERETO FROM BOTH TERMINALS OF SAID BATTERY; A FIRST BURNER-HEAT-ENERGIZABLE ELECTRICAL GENERATOR MEANS POSITIONED TO BE ENERGIZED BY HEAT FROM AT LEAST ONE OF SAID MAIN GAS BURNER AND SAID PILOT GAS BURNER; FIRST GAS-PRESSURE-RESPONSIVE ELECTRICAL SWITCH MEANS HAVING FIRST, SECOND AND THIRD CONTACT ELEMENTS, SAID FIRST CONTACT ELEMENT BEING CONNECTED TO SAID SECOND CONTACT ELEMENT IN THE ABSENCE OF GAS PRESSURE SUPPLIED TO SAID FIRST SWITCH MEANS, SAID FIRST SWITCH MEANS BEING OPERABLE IN RESPONSE TO GAS PRESSURE SUPPLIED THERETO TO CONNECT SAID FIRST CONTACT ELEMENT TO SAID THIRD CONTACT ELEMENT; MEANS CONNECTING ONE TERMINAL OF SAID BATTERY TO SAID FIRST CONTACT ELEMENT; MEANS CONNECTING SAID FIRST GENERATOR MEANS BETWEEN THE OPPOSITE TERMINAL OF SAID BATTERY AND SAID THIRD CONTACT ELEMENT; SECOND BURNER-HEAT-OPERABLE SWITCH MEANS POSITIONED TO BE HEATED BY SAID PILOT BURNER AND COMPRISING A FIRST CONTACT ELEMENT, A SECOND CONTACT ELEMENT AND A THIRD CONTACT ELEMENT, SAID SECOND SWITCH MEANS WHEN COLD CONNECTING SAID FIRST CONTACT ELEMENT TO SAID SECOND CONTACT ELEMENT, SAID SECOND SWITCH MEANS BEING RESPONSIVE TO HEATING BY SAID PILOT BURNER TO CONNECT SAID FIRST CONTACT ELEMENT TO SAID THIRD CONTACT ELEMENT; MEANS CONNECTING SAID OPPOSITE BATTERY TERMINAL TO SAID FIRST CONTACT ELEMENT OF SAID SECOND SWITCH MEANS; MEANS OPERATIVELY CONNECTING SAID ONE BATTERY TERMINAL AND SAID SECOND CONTACT ELEMENT OF SAID SECOND SWITCH MEANS TO SAID ELECTRICAL ACTUATING MEANS OF SAID PILOT GAS SUPPLY VALVE FOR ACTUATING IT WHEN SAID SECOND SWITCH MEANS IS COLD AND FOR DEACTUATING IT WHEN SAID SECOND SWITCH MEANS IS HEATED; MEANS FOR SUPPLYING SAID FIRST SWITCH MEANS WITH GAS UNDER PRESSURE BY WAY OF SAID PILOT GAS SUPPLY VALVE WHEN SAID LAST-NAMED VALVE IS OPEN; MEANS OPERATIVELY CONNECTING SAID IGNITER MEANS BETWEEN SAID SECOND CONTACT ELEMENT OF SAID FIRST SWITCH MEANS AND SAID SECOND CONTACT ELEMENT OF SAID SECOND SWITCH MEANS, FOR ACTUATING SAID IGNITER MEANS WHEN SAID SECOND SWITCH MEANS IS COLD AND WHEN SAID PILOT VALVE IS OPEN; A SECOND GENERATOR MEANS; MEANS CONNECTING SAID SECOND GENERATOR MEANS AND SAID ELECTRICAL ACTUATING MEANS OF SAID MAIN GAS SUPPLY VALVE IN SERIES BETWEEN SAID OPPOSITE BATTERY TERMINAL AND SAID THIRD CONTACT ELEMENT OF SAID SECOND SWITCH MEANS, FOR OPENING SAID MAIN GAS SUPPLY VALVE IN RESPONSE TO CURRENT FROM SAID SECOND GENERATOR MEANS WHEN SAID SECOND SWITCH MEANS HAS BEEN HEATED; AND MEANS SUPPLIED WITH GAS PRESSURE BY WAY OF SAID MEANS GAS SUPPLY VALVE FOR OPERATING SAID FIRST SWITCH MEANS AND FOR SUPPLYING GAS TO SAID PILOT GAS BURNER WHEN SAID PILOT GAS SUPPLY VALVE IS CLOSED AND SAID MAIN GAS SUPPLY VALVE OPEN.