Fluid proportioning apparatus

Claim 1

A PROPORTIONING APPARATUS ADAPTED TO EFFECT A COMBUSTIBLE MIXTURE OF FUEL AND AIR FOR DELIVERY TO A BURNER OR THE LIKE AND COMPRISING A MAIN BODY CASING ESTABLISHING A MIXING CHAMBER AND HAVING A GENERALLY CYLINDRICAL WALL DEFINING AN OPEN-ENDED BORE, THE REAR END OF WHICH CONSTITUTES A DISCHARGE OUTLET FOR THE COMBUSTIBLE MIXTURE FROM THE MIXING CHAMBER, AND THE FRONT END OF WHICH CONSTITUTES AN AIR INLET FOR THE MIXING CHAMBER, SAID WALL BEING PROVIDED WITH A GAS ENTRY PORT FOR THE MIXING CHAMBER, A GAS INLET CASING DEFINING A GAS ENTRY CHAMBER, MOUNTED ON SAID MAIN BODY CASING EXTERIORLY THEREOF AND HAVING AN OPEN END ENCOMPASSING A PORTION OF SAID GENERALLY CYLINDRICAL WALL AND IN REGISTER WITH THE GAS ENTRY PORT WHEREBY COMMUNICATION BETWEEN THE GAS ENTRY AND MIXING CHAMBERS IS ESTABLISHED THROUGH SAID GAS ENTRY PORT, A FIXED SHUTTER PLATE EXTENDING ACROSS THE FRONT END OF THE MIXING CHAMBER, A ROTATABLE SHUTTER CASTING MOUNTED ON SAID MAIN BODY CASING FOR LIMITED ANGULAR TURNING MOVEMENTS ABOUT THE AXIS OF SAID GENERALLY CYLINDRICAL WALL AND INCLUDING A MOVABLE SHUTTER PLATE DESIGNED FOR COOPERATION WITH SAID FIXED SHUTTER PLATE, THERE BEING COOPERATING SHUTTER OPENINGS IN SAID SHUTTER PLATES DEFINING A VARIABLE AIR INLET OPENING FOR THE MIXING CHAMBER, A SLIDE VALVE DISPOSED WITHIN SAID GAS ENTRY CHAMBER AND MOVABLE ACROSS SAID GAS ENTRY PORT BETWEEN OPEN AND CLOSED POSITIONS, AN ACTUATING ROD CONNECTED TO THE SLIDE VALVE AND PROJECTING OUTWARDLY THROUGH A WALL OF THE GAS INLET CASING, COOPERATING CAM MEANS ON SAID SHUTTER CASTING AND ENGAGEABLE WITH THE OUTWARDLY PROJECTING PORTION OF THE ACTUATING ROD FOR EFFECTING SIMULTANEOUS MOVEMENT OF THE SLIDE VALVE AND MOVABLE SHUTTER PLATE DURING ANGULAR TURNING MOVEMENT OF THE SHUTTER CASTING, AND AN OPERATING LEVER ON SAID SHUTTER CASTING.