Liquid blending control

Claim 1

IN A LIQUID BLENDER FOR MAINTAINING PROPORTIONAL FLOW OF TWO LIQUIDS TO A SINGLE DISCHARGE, A MULTI-PORT VALVE HAVING A PAIR OF INLETS CONNECTED TO THE TWO LIQUIDS AND AN OUTLET TO DELIVER THE MIXTURE OF THE TWO LIQUIDS AND HAVING A SINGLE MOVABLE VALVE MEMBER TO INVERSELY ADJUST THE CONNECTION OF THE OUTLET TO THE PAIR OF INLETS, A DIFFERENTIAL GEAR UNIT HAVING A PAIR OF OPPOSING INPUTS AND AN OUTPUT CONNECTED TO POSITION SAID MOVABLE VALVE MEMBER AS THE DIFFERENCE IN THE INPUTS, A METER RESPONSIVE TO THE FLOW OF ONE OF SAID LIQUIDS AND CONNECTED TO ONE OF THE INPUTS OF SAID DIFFERENTIAL GEAR UNIT TO DRIVE THE SAME, AND A SECOND METER RESPONSIVE TO THE FLOW OF THE OTHER OF SAID LIQUIDS AND CONNECTED TO THE OTHER INPUT OF SAID DIFFERENTIAL GEAR UNIT TO DRIVE THE SAME, ONE OF SAID METER CONNECTIONS COMPRISING AN ADJUSTABLE DRIVE CONNECTED TO BE DRIVEN BY THE CORRESPONDING METER, A PAIR OF SERIES CONNECTED PLANETARY TRANSMISSIONS CONNECTING SAID ADJUSTABLE DRIVE TO SAID DIFFERENTIAL GEAR UNIT, AND A CONE GEAR DRIVE AND HAVING AN INPUT CONNECTED TO THE ADJUSTABLE DRIVE AND HAVING A PAIR OF SEPERATELY ADJUSTABLE OUTPUTS CONNECTED ONE EACH TO EACH OF SAID PLANETARY TRANSMISSIONS TO ESTABLISH A PLURALITY OF PRESETTABLE DRIVE RATIOS BETWEEN THE CORRESPONDING METER AND THE DIFFERENTIAL GEAR UNIT.