Water treatment and make-up control system

Claim 1

IN A WATER-TREATING SYSTEM WHCIH COMPRISES A BASIN CONTAINING A SUPPLY OF WATER OF VARIABLE LEVEL, A PIPE CONNECTED TO A MAIN ADAPTED TO REPLENISH THE SUPPLY, A PUMP, CONDUIT MEANS CONNECTING THE SUPPLY TO THE SUCTION SIDE OF THE PUMP, A LOAD TO WHICH WATER IS TO BE TRANSFERRED FROM THE BASIN, SECOND CONDUIT MEANS CONNECTING THE LOAD TO THE DISCHARGE SIDE OF THE PUMP, THE COMBINATION COMPRISING: A SUPPLY OF TREATING CHEMICALS, ELECTRIC-MOTORDRIVEN PRESSURING MEANS TO DELIVER CHEMICALS FROM THE CHEMICAL SUPPLY INTO SAID SECOND CONDUIT MEANS, MEANS RESPONSIVE TO THE LEVEL OF THE WATER SUPPLY, SAID LEVELRESPONSIVE MEANS COMPRISING A SWITCH TO DETECT MAXIMUM LEVEL AND A SWITCH TO DETECT MINIMUM LEVEL, A RELAY HAVING A WINDING TO BE ENERGIZED THROUGH THE MEDIUM OF SAID LEVEL-RESPONSIVE MEANS WHEN THE MAXIMUM LEVEL OBTAINS AND TO BE DE-ENERGIZED WHEN SAID LEVEL DEPARTS FROM THE MAXIMUM, A HOLDING CIRCUIT INCLUDING A CURRENT SOURCE, SAID MINIMUM LEVEL SWITCH, A SET OF HOLDING CONTACTS FORMING PART OF THE RELAY AND ONE END OF THE RELAY WINDING TO MAINTAIN THE RELAY ENERGIZED NOTWITHSTANDING DEPARTURE OF THE LEVEL FROM SAID MAXIMUM, SAID MINIMUM LEVEL DETECTING SWITCH, WHEN OPENED BY THE LEVEL REACHING ITS MINIMUM, BREAKING SAID HOLDING CIRCUIT, A SECOND SET OF CONTACTS CONTROLLED BY SAID RELAY ADAPTED TO OPEN AND CLOSE A CURCUIT FROM ON SIDE OF THE CURRENT SOURCE, A SOLENOID-OPERATED VALVE IN THE REPLENSHING PIEP, ONE SIDE OF THE VALVE BEING CONNECTED TO THE OTHER SIDE OF THE CURRENT SOURCE, ONE SIDE OF THE ELECTRIC MOTOR BEING CONNECTED TO SAID ONE SIDE OF THE CURRENT SOURCE, THE OTHER SIDE OF THE ELECTRIC MOTOR AND SOLENOID VALVE BEING CONNECTED THROUGH SAID SECOND SET OF CONTACTS TO THE OTHER SIDE OF THE CURRENT SOURCE WHEREBY REPLENISHMENT OF WATER AND FEED OF CHEMICALS OCCURS CONCURRENTLY.