Carburetting devices for internal combustion engines

Claim 1

FOR USE IN CONNECTION WITH AN INTERNAL COMBUSTION ENGINE, A CARBURETTING DEVICE FOR SAID ENGINE WHICH COMPRISES, IN COMBINATION, AN INDUCTION PIPE LEADING TO SAID ENGINE, A MAIN THROTTLE VALVE IN SAID INDUCTION PIPE, SAID MAIN THROTTLE VALVE BEING OPERABLE TO CONTROL THE OPEATION OF THE INTERNAL COMBUSTION ENGINE, AND AUXILIARY THROTTLE VALVE IN SAID INDUCTION PIPE LOCATED UPSTREAM OF SAID MAIN THROTTLE VALVE, YIELDING MEANS FOR AUTOMATICALLY URGING SAID AUXILIARY THROTTLE VALVE TOWARD ITS CLOSED POSITION, SAID THROTTLE VALVES LIMITING BETWEEN THEM, IN SAID INDUCTION PIPE, A SUCTION CHAMBER, FUEL FEED MEANS INCLUDING A DELIVERY ORIFICE IN COMMUNICATION WITH SAID IN DUCTION PIPE DOWNSTREAM OF SAID MAIN THROTTLE VALVE, A CASING, DIAPHRAGM MEANS MOUNTED IN SAID CASINF FOR DIVIDING THE INSIDE THEREOF INTO TWO SPACES, MEANS FOR PLACING ONE OF SAID SPACES IN COMMUNICATION WITH SAID SUCTION CHAMBER, MEANS FOR PLACING THE OTHER OF SAID SPACES IN COMMUNICATION WITH THE ATMOSPHERE, A FUEL DELIVERY PUMP, FUEL PRESSURE REGULATING MEANS COMPRISING A CONTAINER MOUNTED BETWEEN THE OUTPUT OF SAID PUMP AND SAID FUEL FEED MEANS, A DISCHARGE VALVE MOUNTED ON SAID CONTAINER AND OPERATIVELY CONNECTED WITH SAID DIAPHRAGM MEANS, SAID FUEL FEED MEANS COMPRISING A FUEL DELIVERY CONDUIT LEADING FROM SAID CONTAINER TO SAID DELIVERY ORIFICE, AND FUEL METERING MEANS IN SAID DELIVERY CONDUIT BETWEEN SAID PRESSURE REGULATING MEANS AND SAID DELIVERY CIRCUIT ORIFICE, SAID FUEL METERING MEANS BEING OPERATIVELY CONNECTED WITH SAID AUXILIARY THROTTLE VALVE FOR CONTROLLING THE FLOW RATE OF FUEL FROM SAID DELIVERY ORIFICE SO THAT SAID FLOW RATE IS PROPORTIONAL TO THE WHICH WOULD BE OBTAINED BY THE FLOW OF FUEL THROUGH A SINGLE ORIFICE OF A CROSS SECTION SUBSTANTIALLY PROPORTIONAL TO THE CROSS SECTION AREA LEFT FREE IN SAID INDUCTION PIPE BY SAID AUXILIARY THROTTLE VALVE.