Continuous water heater

Claim 1

A WATER HEATING SYSTEM COMPRISING, A WATER STORAGE TANK, A PLURALITY OF EMERSION HEATERS EXTENDING INTO SAID TANK, SAID EMERSION HEATERS EACH COMPRISING A SHROUD EXTENDING INTO SAID TANK AND BEING OPEN TO THE EXTERIOR OF SAID TANK AND BEING CLOSED AT ITS INNER EXTENDING END, A HOT WATER OUTLET CONDUIT CONNECTED IN COMMUNICATION WITH THE INNER EXTENDING END PORTION OF EACH OF SAID SHROUDS AND ARRANGED TO DELIVER INTO THE BODY OF SAID TANK, DETACHABLE COVER MEANS NORMALLY CLOSING THE OUTER OPEN END PORTION OF EACH OF SAID SHROUDS TO PROVIDE EACH OF CLOSED VESSEL FORM, A HEAT SUPPLY DEVICE DISPOSED WITHIN EACH SAID SHROUDS, A COLD WATER INLET CONDUIT CONNECTED FOR DELIVERY INTO THE OUTER END PORTION OF EACH OF SAID SHROUDS, A STORAGE WATER CIRCULATION DEVICE COMPRISING A PUMP DRAWING WATER FROM A WATER SUPPLY AND DELIVERING IT THROUGH SAID INLET CONDUITS INTO SAID SHROUDS AND THEREBY FORCING HEATED WATER TO PASS THROUGH SAID OUTLET CONDUITS INTO SAID TANK, AND CONTROL MEANS ASSOCIATED WITH SAID CONDUITS AND ADAPTED TO BE REGULATED SO AS TO ELECTIVELY ISOLATE THE INTERIOR OF ANY ONE OF SAID SHROUDS FROM FLUID-FLOW COMMUNICATION WITH THE INTERIOR OF SAID TANK.