Carburetor

Claim 1

A CARBURETOR FOR AN INTERNAL COMBUSTION ENGINE, SAID CARBURETOR COMPRISING A BODY FORMED WITH AN AIR AND FUEL MIXTURE CONDUIT ADAPTED TO BE CONNECTED TO THE INTAKE MANIFOLD OF SAID ENGINE, A THROTTLE VALVE MOUNTED IN SAID CONDUIT FOR MOVEMENT FROM AN OPEN TO A CLOSED POSITION, AN UNBALANCED CHOKE VALVE MOUNTED WITHIN SAID MIXTURE CONDUIT FOR MOVEMENT FOR AN OPEN TO A CLOSED POSITION IN RESPONSE TO AIR FLOW THROUGH SAID MIXTURE CONDUIT, A CHOKE OPERATING LEVER FIXED TO SAID CHOKE VALVE, SAID BODY HAVING AN OPEN PASSAGEWAY ADAPTED TO BE CONNECTED AT ONE END TO A SOURCE OF ENGINE HEATED AIR AND HAVING THE OTHER END OPENING INTO SAID MIXTURE CONDUIT DOWNSTREAM OF SAID THROTTLE VALVE, SAID PASSAGEWAY INCLUDING A THERMOSTATIC SPRING HOUSING, A THERMOSTATIC SPRING IN SAID HOUSING AND RELEASABLY CONNECTED TO SAID LEVER TO RESIST OPENING OF SAID CHOKE VALVE DURING A PREDETERMINED RANGE OF COLD AMBIENT TEMPERATURES IN SAID HOUSING, SAID PASSAGEWAY INCLUDING A BYPASS PORTION EXTENDING AROUND SAID THERMIONIC SPRING HOUSING, A BAFFLE FIXED TO SAID CHOKE LEVER AND HAVING A FIRST PORTION POSITIONED ACROSS SAID BYPASS DURING A RANGE OF COLD AMBIENT TEMPERATURES FOR DECREASING THE AIR FLOW THERETHROUGH TO THEREBY INCREASE HEATED AIR FLOW THROUGH SAID SPRING HOUSING, SAID BAFFLE INCLUDING A SECOND REDUCED PORTION MOVABLE ACROSS SAID BYPASS TO INCREASE AIR FLOW THROUGH SAID BYPASS AND THEREBY DECREASE HEATED AIR FLOW THROUGH SAID SPRING HOUSING, AND A MANIFOLD VACUUM RESPONSIVE MEANS IN SAID REDUCED BAFFLE CONNECTED TO SAID CHOKE LEVER TO MOVE SAID REDUCED BAFFLE PORTION ACROSS SAID PASSAGEWAY WHEN AMBIENT TEMPERATURE IN SAID CHOKE HOUSING IS IN A PREDETERMINED TEMPERATURE RANGE.