Safety control apparatus

Claim 1

CONTROL APPARATUS FOR A GAS HEATING BURNER HAVING AN ASSOCIATED PILOT BURNER; COMPRISING MEANS FORMING A GAS PASSAGE HAVING A GAS INLET, A FIRST HEATING-GAS OUTLET THEREFORM FOR THE HEATING BURNER AND A SECOND PILOT-GAS OUTLET THEREFROM FOR THE PILOT BURNER, A FIRST HEATING-GAS VALVE MOVABLE TO OPEN AND CLOSE THE FIRST GAS OUTLET, A SECOND PILOT-GAS VALVE MOVABLE TO OPEN AND CLOSE THE SECOND GAS OUTLET, THERMOSTATIC MEANS ADAPTED TO OPEN AND CLOSE SAID FIRST VALVE, A HEATER FOR THE THERMOSTATIC MEANS, SAID THERMOSTATIC MEANS BEING ADAPTED WHEN HEATED BY SAID HEATER TO OPEN SAID FIRST VALVE AND TO CLOSE IT UPON COOLING, AN ELECTRIC CIRCUIT INCLUDING A SWITCH CONTROLLING THE HEATER, SAID SWITCH ADAPTED WHEN CLOSED TO CAUSE THE HEATER TO HEAT SAID THERMOSTATIC MEANS AND THEREBY OPEN SAID FIRST VALVE, AND OPERATING MEANS CONNECTING SAID SECOND VALVE AND THE SWITCH ADAPTED FOR MOVEMENT TO ONE POSITION SIMULTANEOUSLY TO CLOSE THE SWITCH AND OPEN THE SECOND VALVE AND ADAPTED FOR MOVEMENT TO ANOTHER POSITION SIMULTANEOUSLY TO OPEN THE SWITCH AND CLOSE THE SECOND VALVE.