Carburetor

Claim 1

IN A CARBURETOR HAVING A FUEL BOWL, A MIXTURE CONDUIT, A THROTTLE FOR THE MIXTURE CONDUIT MOUNTED ON A SHAFT FOR ROTATION, A FUEL SYSTEM FOR DELIVERY OF FUEL FROM THE BOWL TO THE MIXTURE CONDUIT INCLUDING AN UPWARDLY OPENING METERING JET IN THE BOWL BELOW THE LEVEL OF FUEL THEREIN, A VERTICAL VACUUM CYLINDER IN THE CARBURETOR OPEN AT THE TOP, A VACUUM CONNECTION TO THE LOWER END OF THE CYLINDER, A PISTON SLIDABLE IN THE CYLINDER AND EXTENDING OUT OF THE UPPER END OF THE CYLINDER, A SPRING BIASING THE PISTON UPARD, ELONGATE GUIDE MEANS IN THE CARBURETOR EXTENDING IN A GENERALLY VERTICAL DIRECTION, A SLIDER EXTENDING LATERALLY FROM THE UPPER END OF THE PISTON AND SLIDABLY GUIDED BY THE GUIDE MEANS TO GUIDE THE PISTON FOR AXIAL MOVEMENT IN THE CYLINDER, A METERING ROD CARRIED BY THE SLIDER EXTENDING DOWN INTO THE METERING JET, AND AN ARM OPERATIVELY CONNECTED TO THE THROTTLE SHAFT AND ENGAGEABLE BY THE SLIDER LATERALLY OF THE PISTON, SAID GUIDE MEANS HAVING VERTICALLY SPACED GUIDE PORTIONS SLIDABLY ENGAGED BY THE SLIDER AT SPACED POINTS ALONG THE LENGTH OF THE GUIDE MEANS THEREBY TO PREVENT CANTING OF THE PISTON.