Motor idling speed control proportioning valve

Claim 1

A CARBURETOR FOR AN INTERNAL COMBUSTION ENGINE, AND CARBURETOR HAVING A CARBURETOR BARREL AND A MAIN THROTTLE VALVE, A FIRST VALVE CHAMBER LEADING TO A FIRST VALVE SEAT FORMING A FIRST VALVE OPENING INTO SAID CARBURETOR BARREL OUTLET INTO SAID CHAMBER ADJACENT SAID AND A FUEL SUPPLY OUTLET INTO SAID CHAMBER ADJACENT SAID VALVE SEAT, COMPRISING: A BODY WITH A SECOND VALVE CHAMBER AND A NOZZLE MEMBER ATTACHED TO SAID BODY ADAPTED TO FIT WITHIN AND COAXIALLY WITH SAID FIRST VALVE CHAMBER, THE UNATTACHED END OF SAID NOZZLE MEMBER FORMING A FIRST VALVE WITH SAID FIRST VALVE SEAT AND ADAPTED TO BE ADJUSTABLY SPACED FROM SAID FIRST VALVE SEAT; A COAXIAL AIR PASSAGE THROUGH THE ENTIRE LENGTH OF SAID NOZZLE MEMBER COMMUNCATING SAID SECOND VALVE CHAMBER WITH SAID CARBURETOR BARREL; AN END MEMBER COAXIAL WITH SAID SECOND VALVE CHAMBER PROVIDING A SECOND VALVE SEAT AND AN AIR INLET PASSAGE INTO SAID SECOND VALVE CHAMBER; A CLOSURE MEMBER BIASED WITHIN SAID SECOND VALVE CHAMBER AGAINST SAID SECOND VALVE SEAT FORMING A SECOND VALVE RESPONSIVE TO THE VACUUM IN SAID CARBURETOR BARREL OF SAID COMBUSTION ENGINE TO OPEN SAID SECOND VALVE; FIRST ADJUSTMENT MEANS ADAPTED TO ADJUST SAID FIRST VALVE THEREBY ADJUSTING THE FLOW OF FUEL FROM SAID FUEL SUPPLY OUTLET THROUGH SAID FIRST VALVE OPENING INTO SAID CARBURETOR BARREL; AND SECOND ADJUSTMENT MEANS INDEPENDENT OF SAID FIRST ADJUSTMENT MEANS ADAPTED TO ADJUST THE BIASING FORCE ON SAID CLOSURE MEMBER THEREBY ADJUSTING THE FLOW OF AIR FROM SAID AIR INLET PASSAGE ADJUSTING THE FLOW OF AIR PASSAGE THROUGH SAID NOZZLE MEMBER AND INTO SAID CARBURETOR BARREL.