Mixture ratio control valve

Claim 1

IN A FLUID SYSTEM, A FIRST SOURCE OF FLUID, A SECOND SOURCE OF FLUID, A CONTAINER FOR SAID FLUIDS, FEED LINES CONNECTING SAID SOURCES WITH SAID CONTAINER, THE IMPROVEMENT RESIDING IN A VALVE DISPOSED IN SAID LINE CONNECTING SAID FIRST SOURCE TO SAID CONTAINER FOR CONTROLLING FLOW OF SAID FIRST FLUID TO SAID CONTAINER FOR MAINTAINING A PREDETERMINED RATIO FO SAID FLUIDS IN SAID CONTAINER, SAID VALVE INCLUDING A HOUSING PROVIDED WITH UPPER AND LOWER PLATES HAVING INLET AND OUTLET PORTS RESPECTIVELY DISPOSED THEREIN IN ALIGNMENT AND AN INTERIOR CHAMBER INTERMEDIATE SAID PORTS, A GATE DISPOSED IN SAID CHAMBER FOR RECIPROCATING MOVEMENT BETWEEN A FIRST POSITION AND A SECOND POSITION WHEREIN SAID GATE IN ITS FIRST POSITION PROVIDES A FULLY OPEN PASSAGEWAY FROM SAID INLET TO SAID OULET AND WHEN IN SAID SECOND POSITION PROVIDES A PARTIALLY OPEN PASSAGEWAY BETWEEN SAID INLET AND OUTLET, AND SAID GATE PROVIDED WITH AN INWARDLY CURVED SURFACE, MEANS FOR MOVING SAID GATE IN A RECIPROCATING MOVEMENT INCLUDING A BOSS SECURED TO ONE END OF SAID GATE, A SHAFT SECURED IN SAID HOUSING AND HAVING ONE END IN THREADED ENGAGEMENT WITH SAID BOSS, SAID SHAFT DISPOSED FOR ROTATION IN SAID BOSS FOR MOVEMENT OF GATE, MEANS FOR GUIDING SAID GATE IN THE RECIPROCATING MOVEMENT AND FOR LIMITING MOVEMENT OF SAID GATE, SAID MEANS INCLUDING A RECESS FORMED IN SAID UPPER PLATE AND HAVING A PAIR OF SUBSTANTIALLY PARALLEL SURFACES EXTENDING ABOUT TWO THRIDS OF THE DIAMETER OF SAID INLET PORT AND A PAIR OF SEATING SURFACES DISPOSED IN NORMAL RELATION TO SAID PARALLEL SURFACES TO PROVIDE A SEAT FOR SAID GATE, SAID MEANS FOR GUIDING AND LIMITING MOVEMENT OF SAID GATE COACTING WITH SAID GATE SO THAT WHEN SAID GATE IS IN SAID SECOND POSITION SAID INWARDLY CURVED SURFACE COOPERATES WITH A WALL OF THE CHAMBER TO COVER ONLY A MAJOR PORTION OF SAID INTERIOR CHAMBER TO PROVIDE THE PARTIALLY OPEN PASSAGEWAY.