Carburetting devices for internal combustion engines

Claim 1

A CARBURETTING DEVICE FOR AN INTERNAL COMBUSTION ENGINE WHICH COMPRISES, IN COMBINATION: AN AIR INTAKE PIPE, A MAIN THROTTLE VALVE IN SAID PIPE, AN AUXILIARY THROTTLE VALVE IN SAID PIPE UPSTREAM OF SAID MAIN THROTTLE VALVE, MEANS TO BIAS SAID AUXILIARY THROTTLE VALVE TOWARDS A CLOSED POSITION, SAID AUXILIARY THROTTLE VALVE BEING MOUNTED TO OPEN AUTOMATICALLY, IN RESPONSE TO THE FLOW OF AIR THROUGH SAID INTAKE PIPE, GRADUALLY MORE AND MORE AS THE AIR FLOW RATE THROUGH SAID INTAKE PIPE INCREASES, A CONSTANT LEVEL FUEL CHAMBER, NORMAL FUEL FEED MEANS FOR LEADING FUEL FROM SAID CONSTANT LEVEL FUEL CHAMBER TO SAID INTAKE PIPE DOWNSTREAM OF SAID AUXILIARY THROTTLE VALVE, MEANS OPERATIVELY CONNECTED WITH SAID AUXILIARY THROTTLE VALVE FOR METERING THE FLOW OF FUEL THROUGH SAID FUEL FEED MEANS SO THAT THE CROSS SECTION OF FLOW AFFORD TO AIR BY SAID AUXILIARY THROTTLE VALVE THROUGH SAID INTAKE PIPE AND THE CROSS SECTION AFFORDED TO FUEL THROUGH SAID FUEL FEED MEANS REMAIN SUBSTANTIALLY PROPORTIONAL TO EACH OTHER, STARTING AND COLD RUNNING FUEL FEED CONDUIT MEANS FOR FEEDING SUPPLEMENTARY FUEL TO SAID INTAKE PIPE, SAID LAST MENTIONED MEANS OPENING INTO A SPACE IN COMMUNICATION WITH SAID INTAKE PIPE, WHERE THE PRESSURE IS THE SAAME AS THAT IN THE PORTION OF SAID INTAKE PIPE LOCATED BETWEEN SAID TWO THROTTLE VALVES. A DISTRIBUTING MEMBER INCLUDING A FIRST VALVE MEANS FOR OPENING SAID STARTING AND COLD RUNNING FUEL FEED CONDUIT MEANS, AND SECOND VALVE MEANS OPERATIVELY CONNECTED WITH SAID AUXILIARY THROTTLE VALVE FOR GRADUALLY THROTTLING SAID STARTING AND COLD RUNNING FUEL FEED CONDUIT MEANS IN RESPONSE TO THE OPENING OF SAID AUXILIARY THROTTLE VALVE.