Carburetors

Claim 1

IN A CARBURETOR FOR AN INTERNAL COMBUSTION ENGINE, THE COMBINATION OF AN INDUCTION PIPE WITH AN AIR INTAKE, AN UNBALANCED CHOKE VALVE IN SAID PIPE MOUNTED TO BE URGED IN THE OPENING DIRECTION BY THE INFLOW OF AIR THROUGH SAID PIPE, A FIRST THERMOSTATIC DEVICE RESPONSIVE TO ENGINE TEMPERATURE VARIATIONS, TRANSMISSION MEANS MOUNTED BETWEEN SAID FIRST THERMOSTATIC DEVICE AND SAID CHOKE VALVE FOR CLOSING SAID VALVE FOR ENGINE TEMPERATURES UP TO A GIVEN LIMIT AND ALLOWING IT TO OPEN MORE AND MORE AS THE ENGINE TEMPERATURE IS HIGHER AND HIGHER ABOVE SAID LIMIT, A THROTTLE VALVE IN SAID PIPE DOWNSTREAM OF SAID CHOKE VALVE, A CAM MOUNTED ROTATABLE IN BOTH DIRECTIONS WITH RESPECT TO SAID PIPE, SAID CAM BEING OPERATIVELY CONNECTED WITH SAID THROTTLE VALVE FOR DETERMINING THE IDLING RUNNING POSITION THEREOF, MEANS FOR URGING SAID CAM CONSTANTLY TO ROTATE IN THE DIRECTION CORRESPONDING TO DECREASING OPENINGS OF SAID THROTTLE VALVE, A SECOND THERMOSTATIC DEVICE RESPONSIVE TO ENGINE TEMPERATURE VARIATIONS, SAID TRANSMISSION MEANS BETWEEN SAID FIRST THERMOSTATIC DEVICE AND SAID CHOKE VALVE INCLUDING AN ABUTMENT ADAPTED TO COOPERATE WITH SAID CAM FOR ROTATING IT IN A DIRECTION OPPOSED TO SAID LAST MENTIONED DIRECTION WHEN THE ENGINE TEMPERATURE IS LESS AND LESS ABOVE SAID LIMIT TEMPERATURE, MEANS OPERATIVELY CONNECTED WITH SAID SECOND THERMOSTATIC DEVICE AND FORMING AN ABUTMENT FOR SAID CAM TO ROTATE IT IN THE DIRECTION CORRESPONDING TO INCREASING OPENINGS OF SAID THROTTLE VALVE WHEN THE ENGINE TEMPERATURE IS MORE AND MORE BELOW SAID LIMIT TEMPERATURE, PNEUMATIC MEANS OPERATIVE BY THE SUCTION CREATED IN SAID PIPE DOWNSTREAM OF SAID THROTTLE VALVE WHEN THE ENGINE IS STARTED FOR IMPARTING TO SAID TRANSMISSION MEANS IS DISPLACEMENT OPENING SAID CHOKE VALVE, AND AN ABUTMENT CARRIED BY SAID TRANSMISSION MEANS AND ADAPTED TO COOPERATE WITH SAID SECOND THERMOSTATIC DEVICE WHEN IT IS IN A POSITION CORRESPONDING TO AN ENGINE TEMPERATURE BELOW SAID LIMIT TEMPERATURE FOR PLACING SAID SECOND THERMOSTATIC DEVICE OUT OF CONNECTION WITH SAID CAM IN RESPONSE TO SAID DISPLACEMENT IMPARTMENT TO SAID TRANSMISSION MEANS.