Air control device for carbureted engines

Claim 1

IN AN INTERNAL COMBUSTION ENGINE HAVING AN ENGINE FUEL AND AIR INDUCTION SYSTEM INCLUDING A CARBURETOR AND AN INTAKE MANIFOLD, SAID CARBURETOR HAVING A THROAT COMMUNICATIVELY CONNECTED TO SAID INTAKE MANIFOLD, A ROTATABLE THROTTLE VALVE IN SAID THROAT TO RESTRICT THE FLOW OF AIR THERETHROUGH, A CONTROL ARRANGEMENT FOR SAID VALVE COMPRISING: A THROTTLE PLATE ROTATABLY MOUNTED ON SAID CARBURETOR AND CONNECTED TO SAID THROTTLE VALVE TO ROTATE SAID THROTTLE VALVE; SECOND RESILIENT MEANS BEING CONNECTED BETWEEN SAID THROTTLE PLATE AND AN ASSOCIATED THROTTLE CONTROL LEVER, SAID RESILIENT MEANS BEING ADAPTED TO ROTATE SAID THROTTLE PLATE AND SAID ASSOCIATED THROTTLE VALVE IN A FIRST DIRECTION TENDING TO CLOSE SAID VALVE WITH A PREDETERMINED FORCE UPON ROTATION OF SAID CONTROL LEVER IN SAID FIRST DIRECTION; FIRST RESILIENT MEANS BEING MOUNTED ON SAID THROTTLE PLATE AND BEING ADAPTED TO RESIST MOVEMENT OF SAID THROTTLE VALVE IN SAID FIRST DIRECTION FROM AN IDLE POSITION TO A COMPLETELY CLOSED POSITION WITH A PREDETERMINED BIASING FORCE RELATIVELY GREATER THAN THE FORCE OF SAID SECOND RESILIENT MEANS; AND MEANS TO RENDER THE FIRST RESILIENT SPRING MEANS INEFFECTIVE AT A PREDETERMINED POSITION OF OPPOSITION TO SAID SECOND RESILIENT MEANS TO COMPLETELY CLOSE SAID THROAT TO A FLOW OF AIR AND FUEL THERETHROUGH.