Fuel metering control for a constant metering force carburetor

Claim 1

A CARBURETOR FOR AN INTERNAL COMBUSTION ENGINE COMPRISING AN INDUCTION PASSAGE, A THROTTLE VALVE FOR CONTROLLING THE FLOW OF COMBUSTIBLE MIXTURE THROUGH SAID INDUCTION PASSAGE, AIR VALVE MEANS IN SAID INDUCTION PASSAGE ANTERIOR TO SAID THROTTLE VALVE, SAID AIR VALVE MEANS BEING MOVABLE IN RESPONSE TO PRESSURE VARIATIONS IN SAID INDUCTION PASSAGE FOR MAINTAINING A SUBSTANTIALLY CONSTANT PRESSURE BETWEEN SAID AIR VALVE AND SAID THROTTLE VALVE, A FUEL SOURCE, A FUEL DISCHARGE CIRCUIT FOR DISCHARGING FUEL FROM SAID FUEL SOURCE INTO THE PORTION OF SAID INDUCTION PASSAGE BETWEEN SAID AIR VALVE AND SAID THROTTLE VALVE, A FUEL METERING VALVE FOR CONTROLLING A RATE OF FUEL FLOW THROUGH SAID FUEL DISCHARGE CIRCUIT, A METERING CONE SUPPORTING SHAFT FIXED RELATIVE TO SAID CARBURETOR, A METERING CONE SUPPORTED BY SAID METERING CONE SUPPORTING SHAFT FOR AXIAL AND ROTARY MOVEMENT RELATIVE TO SAID SHAFT, FOLLOWER MEANS IN ENGAGEMENT WITH SAID METERING CONE FOR MOVEMENT UPON AXIAL AND ROTARY MOVEMENT OF SAID METERING CONE UPON SAID METERING CONE SUPPORTING SHAFT, MEANS INTERCONNECTING SAID FOLLOWER MEANS WITH SAID FUEL METERING VALVE FOR OPERATING SAID METERING VALVE UPON MOVEMENT OF SAID METERING CONE, MEANS OPERATIVELY CONNECTING SAID AIR VALVE AND SAID METERING CONE FOR SIMULTANEOUS MOVEMENT OF SAID METERING CONE IN ONE OF SAID DIRECTIONS UPON MOVEMENT OF SAID AIR VALVE, AND MEANS RESPONSIVE TO AN ENGINE OPERATING CONDITION FOR MOVING SAID METERING CONE IN THE OTHER OF SAID DIRECTIONS IN RESPONSE TO CHANGES IN SAID CONDITION.