Liquid metering assembly and method

Claim 1

A METERING ASSEMBLY HAVING ALTERNATE FILLING AND DRAINING LIQUID CONTAINERS FOR MEASURING A FLOW OF LIQUID THROUGH THE ASSEMBLY, SAID ASSEMBLY INCLUDING, FIRST AND SECOND LIQUID CONTAINERS, INLET AND OUTLET FLOW LINES CONNECTED TO EACH LIQUID CONTAINER, AN INLET AND AN OUTLET ELECTRICAL CONTROLLED VALVE ELEMENT IN THE FLOW LINES OF EACH CONTAINER, AN UPPER FLOAT IN AN UPPER PORTION OF EACH LIQUID CONTAINER AND A LOWER FLOAT IN A LOWER PORTION OF EACH LIQUID CONTAINER, SAID FLOATS MOVABLE BY BUOYANCY OF LIQUID IN THE LIQUID CONTAINERS, AN ELECTRICAL SWITCH CONNECTED TO EACH FLOAT, EACH SWITCH OPENING UPON MOVEMENT OF ITS FLOAT IN ONE DIRECTION AND CLOSING UPON MOVEMENT OF ITS FLOAT IN THE OTHER DIRECTION, AN INTERLOCKING RELAY, A TRIPLE GANGED DOUBLE THROW CONTACT SWITCH CONTROLLED BY SAID RELAY AND CHANGING POSITION ON ACTUATION OF SAID RELAY, TWO INTERLOCKING RELAY ACTUATION CIRCUITS CONNECTED TO ONE OF THE DOUBLE THROW CONTACT SWITCHES, ONE OF SAID CIRCUITS CONNECTED TO THE BOTTOM FLOAT SWITCH OF THE FIRST CONTAINER AND TO THE TOP FLOAT SWITCH OF THE SECOND CONTAINER WHILE THE SECOND CIRCUIT IS CONNECTED TO THE BOTTOM FLOAT SWITCH OF THE SECOND CONTAINER AND THE TOP FLOAT SWITCH OF THE FIRST CONTAINER WHEREBY THE RELAY IS ACTUATED BY THE FLOATS AND SWITCHES CONNECTED TO THE FLOATS EACH TIME ONE OF THE CONTAINERS IS EMPTIED AND THE OTHER IS FILLED, SAID INLET AND OUTLET VALVE CONTROL ELEMENTS BEING CONNECTED TO THE SECOND AND THIRD DOUBLE THROW CONTACT SWITCHES, THE INLET VALVES BEING CONNECTED TO OPPOSITE CONTACTS OF SAID SECOND AND THIRD DOUBLE THROW SWITCHES AND THE OUTLET VALVES BEING CONNECTED TO OPPOSITE CONTACTS OF THE SECOND AND THIRD DOUBLE THROW SWITCHES WHEREBY SIMULTANEOUSLY ONE CONTAINER COMMENCES FILLING AND THE OTHER COMMENCES EMPTYING.