Fuel burner control system

Claim 1

A CONTROL SYSTEM FOR A FUEL BURNER HAVING A NOZZLE, A SOURCE OF FUEL UNDER PRESSURE, AND MEANS FOR IGNITING SAID FUEL WHEN LEAVING SAID BURNER NOZZLE, SAID CONTROL SYSTEM COMPRISING FUEL PUMP MEANS FOR PROVIDING A SUPPLY OF FUEL FROM SAID FUEL SOURCE TO SAID BURNER NOZZLE; RELAY CONTROL MEANS ADAPTABLE TO BE CONNECTED TO AN ELECTRICAL POWER SOURCE HAVING A PAIR OF OUTPUT TERMINALS; VALVE MEANS IN CIRCUIT WITH SAID RELAY CONTROL MEANS AND OPERATIVE IN RESPONSE THERETO FOR CONTROLLING SAID FUEL PUMP MEANS FOR SELECTIVELY PROVIDING A FIRST LEVEL OF FUEL FLOW TO SAID BURNER NOZZLE CORRESPONDING TO A LOW-FIRE BURNER CONDITION, AND A SECOND LEVEL OF FUEL FLOW TO SAID BURNER NOZZLE GREATER THAN SAID FIRST LEVEL CORRESPONDING TO A HIGHFIRE BURNER CONDITION; AN IGNITION TRANSFORMER ADAPTABLE TO BEING SELECTIVELY CONNECTED TO ELECTRICAL POWER SOURCE HAVING A PAIR OF OUTPUT TERMINALS FOR PROVIDING A VOLTAGE TO ENERGIZE SAID FUEL IGNITION MEANS; FAIL SAFE MEANS OPERATIVE TO ALLOW THE ESTABLISHMENT OF SAID HIGH-FIRE BURNER CONDITION ONLY UPON THE PRIOR ESTABLISHMENT OF SAID LOWFIRE BURNER CONDITION, SAID FAIL SAFE MEANS COMPRISING FLAME DETECTION MEANS FOR DETECTING SAID LOW-FIRE CONDITION; SAID PUMP MEANS COMPRISING A FUEL PUMP HAVING FIRST AND SECOND SUCTION INPUTS AND A PRESSURE OUTPUT, AN INPUT FUEL LINE ADAPTABLE TO BE CONNECTED FROM SAID SOURCE OF FUEL TO SAID FIRST SUCTION INPUT, AN OUTPUT FUEL LINE CONNECTED TO SAID PRESSURE OUTPUT, A FEEDBACK FUEL LINE CONNECTED BETWEEN SAID OUTPUT FUEL LINE AND SAID SECOND SUCTION INPUT, AND A NOZZLE FUEL LINE CONNECTED TO SAID BURNER NOZZLE FROM THE JUNCTION OF SAID OUTPUT FUEL LINE AND SAID FEEDBACK FUEL LINE; SAID VALVE MEANS COMPRISING A FIRST NORMALLY CLOSED VALVE DISPOSED IN SAID FEEDBACK LINE, SAID FIRST VALVE BEING OPERATIVE IN RESPONSE TO SAID RELAY CONTROL MEANS SELECTIVELY VARY THE MAGNITUDE OF FUEL FLOW FROM SAID OUTPUT FUEL LINE TO SAID SECOND SUCTION INPUT, AND A SECOND VALVE DISPOSED IN SAID NOZZLE FUEL LINE TO SELECTIVELY VARY THE MAGNITUDE OF THE FUEL FLOW FROM SAID OUTPUT FUEL LINE TO SAID BURNER NOZZLE TO THEREBY CONTROL THE MAGNITUDE OF THE BURNER FLAME.