Carburetor

Claim 1

A CARBURETOR COMPRISING A BODY STRUCTURE HAVING AN AIR AND FUEL MIXTURE CONDUIT THERETHROUGH, A THROTTLE VALVE MOUNTED ACROSS SAID MIXTURE CONDUIT FOR MOVEMENT FROM AN OPEN POSITION TO A POSITION CLOSING SAID MIXTURE CONDUIT, MEANS FOR OPERATING SAID THROTTLE VALVE, AN AIR VALVE MOUNTED WITHIN SAID MIXTURE CONDUIT FOR MOVEMENT FROM A POSITION CLOSING SAID MIXTURE CONDUIT TO AN OPEN POSITION IN RESPONSE TO AIR FLOW THROUGH SAID MIXTURE CONDUIT A SPRING CONNECTED TO SAID AIR VALVE AND BIASING SAID AIR VALVE TOWARD SAID CLOSED POSITON, A LEVER ARM FIXED TO SAID AIR VALVE SHAFT FOR ROTATIONAL MOVEMENT THEREWITH, A FIRST LEVER ROTATABLY MOUNTED AT ONE END ON SAID AIR VALVE SHAFT, SAID FIRST LEVER BEING MOVABLE FROM A FIRST POSITION REPRESENTING COLD ENGINE OPERATION TO A SECOND POSITION REPRESENTING WARM ENGINE OPERATION, SAID LEVER ARM HAVING A LUG FOR ENGAGING A SURFACE OF SAID FIRST LEVER WHEN SAID LEVER ARM MOVES IN A DIRECTION TO CLOSE SAID AIR VALVE, SAID LUG BEING MOVABLE AWAY FROM SAID SURFACE UPON ADDITIONAL OPENING OF SAID AIR VALVE, SAID SECOND POSITION BEING IN THE RANGE OF APPROXIMATELY 25-30 DEGREES FROM THE CLOSED POSITION OF SAID AIR VALVE, A SECOND LEVER MOUNTED AT ONE END ON SAID BODY STRUCTURE FOR ROTATION BETWEEN FIXED POSITIONS, A LINK BETWEEN SAID FIRST AND SECOND LEVERS, AND MEANS PIVOTALLY JOINING THE OTHER ENDS OF SAID FIRST AND SECOND LEVERS TO SPACED PORTIONS OF SAID LINKS WHEREBY SAID LINK FORMS A TOGGLE JOINT WITH SAID SECOND LEVER IN ONE OF SAID FIXED POSITIONS THEREOF TO HOLD SAID FIRST LEVER AGAINST ROTATION AND IN THE PATH OF ROTATION OF SAID LEVER ARM TO PREVENT ROTATION OF SAID AIR VALVE TO ITS CLOSED POSITION, AND TEMPERATURE RESPONSIVE MEANS TO BREAK SAID TOGGLE JOINT IN RESPONSE TO CHANGE IN AMBIENT TEMPERATURE.