Anti-smog carburetor for internal combustion engines

Claim 1

IN A CARBURETOR HAVING A PRECISE FUEL METERING SYSTEM MAINTAINING A NORMALLY CONSTANT FUEL TO AIR RATIO BY WEIGHT BUT VARIABLE UNDER ACCELERATING AND CHOKING OPERATIONS, A WORKING MECHANISM TO CONTROL THE METERING OF FUEL FROM THE METERING ORIFICE OF THE METERING VALVE TO A FUEL/AIR MIXING AREA OF A CARBURETOR THROTTLE AIR VALVE WHICH INCLULDES IN COMBINATION: A DIRECT-ACTING FUEL METERING VALVE, A METERING CAM PIVOTALLY MOUNTED ON A THROTTLE PLATE TYPE AIR VALVE FOR OPERATING SAID FUEL METERING VALVE, A POSITIONING PIN FOR VARYING THE METERIN CAM POSITION BY AN ENGAGEMENT WITH A CONE-SHAPED ADJUSTMENT ROD THAT IS SLIDABLE IN A TUBULAR AXLE FOR SAID THROTTLE VALVE, SAID ADJUSTMENT PIN BEING CONTROLLED IN ITS AXIAL LOCATION RELATIVE TO SAID AXLE BY A MEMBER HAVING A HELICAL SLOT AND A REFERENCE PIN ON SAID ADJUSTMENT PIN AND A STRAIGHT ELONGATED SLOT IN SAID TUBULAR THROTTLE PLATE AXLE PARALLEL TO SAID AXLE''S AXIS, SAID REFERENCE PIN EXTENDING INTO BOTH OF SAID SLOTS SO THAT AN ANGULAR MOVEMENT OF SAID HELICAL SLOT MEMBER CAUSES AN AXIAL MOVEMENTOF SAID ADJUSTMENT PIN TO VARY THE POSITIONING PIN AND THEREBY PRODUCE CORRESPONDING MOVEMENT OF THE METERING CAM THROUGH THE PIVOTABLE ARRANGEMENT WITH THE THROTTLE PLATE; SAID HELICAL SLOT MEMBER BEING A PART OF AN INERTIAL FLYWHEEL MOUNTED ON A BEARING PILOTED ON AND PIVOTABLE WITH SAID TUBULAR AXLE, SAID FLYWHEEL BEING SPRING LOADED TO A BRACKET FIXED ON SAID AJUSTMENT PIN SUCH THAT THE FLYWHEEL IS ALWAYS SPRING RETURNED TO AN ORIGINAL STARTING REFERENCE POSITION AND THIS REFERENCE POSITION BEING ADJUSTABLE BY AN ADJUSTMENT SCREW ON SAID FIXED BRACKET WHICH BEARS ON A DOWEL PIN''S RADIAL SURFACE WHICH PIN IS FIXED IN THE FLYWHEEL WITH ITS AXIS PARALLEL WITH THE THROTTLE PLATE''S TUBULAR AXLE, SAID RETURN SPRING BEING OF A PRECISE CALIBRATED TYPE TO PRODUCE A PRECISE TIME DELAY WITH RESPECT TO ITS MOTION RETURN RATE OF A SPECIFIC MASS-DISPLACEMENT FACTOR OF SAID INERTIAL FLYWHEEL.