Burner control apparatus

Claim 1

IN COMBINATION, A FUEL BURNER UNIT HAVING MEANS ADAPTED TO PROVIDE A FLAME THEREAT, FIRST CONTROL MEANS INCLUDING AN ELECTRICALLY ENERGIZABLE ACTUATOR AND MEANS OPERATIVE WHEN SAID ACTUATOR IS ENERGIZED TO RENDER SAID FUEL BURNER UNIT OPERATIVE, SAFETY CUTOUT MEANS HAVING MEANS CONNECTED IN CONTROLLING RELATION TO SAID FIRST CONTROL MEANS AND HAVING AN ELECTRICALLY ENERGIZABLE ACTUATOR WHICH IS OPERATIVE AFTER A TIME PERIOD OF OPERATION THEREOF TO RENDER SAID FIRST CONTROL MEANS INOPERATIVE, SECOND CONTROL MEANS INCLUDING AN ELECTRICALLY ENERGIZABLE ACTUATOR AND NORMALLY OPEN SWITCH MEANS CONTROLLED THEREBY, ELECTRICALLY OPERABLE FLAME SENSING MEANS, FIRST CIRCUIT MEANS, CONNECTING SAID SECOND CONTROL MEANS ACTUATOR TO A SOURCE OF VOLTAGE AND INCLUDING IN A SERIES CIRCUIT, A FIRST IMPEDANCE, SAID FLAME SENSING MEANS, AND SAID SECOND CONTROL MEANS ACTUATOR, TO THEREBY APPLY AN OPERATING VOLTAGE TO SAID FLAME SENSING MEANS, SECOND CIRCUIT MEANS, INCLUDING SAID SAFETY CUTOUT MEANS ACTUATOR, CONNECTED TO SHUNT A PORTION OF SAID FIRST CIRCUIT MEANS INCLUDING SAID FLAME SENSING MEANS, AND THIRD CIRCUIT MEANS INCLUDING THE NORMALLY OPEN SWITCH MEANS OF SAID SECOND CONTROL MEANS CONNECTED TO SHUNT SAID SAFETY CUTOUT MEANS ACTUATOR TO THEREBY RENDER THE SAME INOPERATIVE AND TO LOWER THE MAGNITUDE OF SAID OPERATING VOLTAGE APPLIED TO SAID FLAME SENSING MEANS.