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, LOCATED UPSTREAM OF SAID MAIN THROTTLE VALVE, SAID AUXILIARY THROTTLE VALVE BEING RESPONSIVE TO THE OPENING THRUST THEREON OF THE AIR STREAM FLOWING THROUGH SAID PIPE, MEANS FOR RESILIENTLY URGING SAID AUXILIARY THROTTLE VALVE TOWARD THE CLOSED POSITION THEROF, A CONSTANT LEVEL FUEL CHAMBER, FUEL FEED MEANS FOR LEADING FUEL FROM SAID CHAMBER TO SAID PIPE, MEANS OPERATIVELY CONNECTED WITH SAID AUXILIARY THROTTLE VALVE FOR METERING THE FLOW OF FUEL THROUGH SAID FUEL FEED MEANS SO THAT THE CROSS SECTION AFFORDED TO AIR BY SAID AUXILIARY THROTTLE VALVE THROUGH SAID PIPE AND THAT AFFORDED TO FUEL THROUGH SAID FUEL FEED MEANS ARE SUBSTANTIALLY PROPORTIONAL TO EACH OTHER, MEANS FOR PLACING THE UPPER PORTION OF SAID CONSTANT LEVEL FUEL CHAMBER IN COMMUNICATION WITH THE ATMOSPHERE, A CASING FIXED IN POSITION WITH RESPECT TO SAID PIPE, A RESILIENTLY MOUNTED DEFORMABLE DIAPHRAGM PARTITION DIVIDING SAID CASING INTO TWO CHAMBERS, A FIRST ONE AND A SECOND ONE, A FIRST CONDUIT CONNECTING SAID FIRST CHAMBER WITH THE PORTION OF SAID INTAKE PIPE DOWNSTREAM OF SAID MAIN THROTTLE VALVE, A SECOND CONDUIT CONNECTING THE SECOND OF SAID CHAMBERS WITH THE PORTION OF SAID INTAKE PIPE UPSTREAM OF SAID AUXILIARY THROTTLE VALVE, A THIRD CONDUIT CONNECTING SAID SECOND CHAMBER WITH THE PORTION OF SAID INTAKE PIPE BETWEEN SAID TWO THROTTLE VALVES, MEANS FOR CONNECTING SAID SECOND CONDUIT WITH THE TOP OF SAID CONSTANT LEVEL FUEL CHAMBER, AND MEANS CARRIED BY SAID DIAPHRAGM PARTITION FOR THROTTLING SAID SECOND CONDUIT MORE AND MORE AS SAID DIAPHRAGM PARTITION IS BEING DEFORMED IN ONE DIRECTION.