Chemical proportioning device

Claim 1

APPARATUS FOR MIXING LIQUIDS IN SELECTED PROPORTIONS, COMPRISING: A CONTAINER HAVING UPPER AND LOWER LIQUID COMPARTMENTS; A VALVE BLOCK DISPOSED BETWEEN THE COMPARTMENTS AND HAVING A MEASURING CHAMBER, AN INLET PASSAGE COMMUNICATING BETWEEN THE CHAMBER AND UPPER COMPARTMENT, AND AN OUTLET PASSAGE COMMUNICATING BETWEEN THE CHAMBER AND LOWER COMPARTMENT; INLET AND OUTLET VALVE PLUNGERS SLIDABLY RECIPROCABLE IN SAID BLOCK IN THE INLET AND OUTLET PASSAGES RESPECTIVELY; MEANS LINKING THE PLUNGERS FOR SIMULTANEOUS MOVEMENT BETWEEN OPPOSITE EXTREME POSITIONS IN ONE OF WHICH THEY CLOSE THE OUTLET PASSAGE WHILE SIMULTANEUSLY OPENING THE INLET PASSAGE, FOR REFILLING OF THE CHAMBER WITH LIQUID FROM THE UPPER COMPARTMENT, AND IN THE OTHER OF WHICH THEY OPEN THE OUTLET PASSAGE WHILE SIMULTANEOUSLY CLOSING THE INLET PASSAGE, THUS TO EMPTY THE CONTENTS OF THE MEASURING CHAMBER INTO THE LOWER COMPARTMENT; A MAIN VALVE FOR REFILLING THE LOWER COMPARTMENT AND ADAPTED FOR MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS; AND MEANS ELECTRICALLY ACTUATING THE PLUNGERS AND MAIN VALVE TO THE RESPECTIVE POSITIONS THEREOF, SAID MEANS OPERATING RESPONSIVE TO RISING AND FALLING OF THE LIQUID LEVEL IN SAID LOWER COMPARTMENT.