Means for supplying brewing water to coffee urns

Claim 1

IN AN URN INCLUDING A SHELL STRUCTURE HAVING AN UPPER DECK AND AT LEAST ONE URN JAR SUSPENDED THEREIN, WHEREBY THE SPACE SURROUNDING THE URN JAR WITHIN THE SHELL STRUCTURE FORMS A HOT WATER COMPARTMENT, A BREWED COFFEE OUTLET FROM THE BOTTOM OF SAID URN JAR FOR DISCHARGE EXTERNALLY OF SAID SHELL STRUCTURE AND A COFFEE BASKET ADAPTED TO BE FITTED IN THE UPPER END OF SAID URN JAR, THE COMBINATION OF MEANS FOR SUPPLYING BREWING WATER FROM A WATER SOURCE, COMPRISING: MEANS FOR SPRAYING WATER OVER THE COFFEE IN SAID COFFEE BASKET; A BREWING WATER LINE CONNECTING SAID SPRAYING MEANS WITH A SOURCE OF WATER; A HEAT EXCHANGER INTERPOSED IN SAID BREWING WATER LINE AND MOUNTED IN HEAT-RECEIVING RELATION WITH THE HOT WATER CONTAINED IN SAID HOT WATER COMPARTMENT; A CONTROL VALVE IN SAID BREWING WATER LINE UPSTREAM OF SAID HEAT EXCHANGER; A LATERAL TUBE EXTENDING FROM SAID CONTROL VALVE INTO SAID HOT WATER TANK FOR DISCHARGE THEREIN; SAID CONTROL VALVE HAVING A FIRST POSITION INTERCONNECTING SAID LATERAL TUBE WITH SAID WATER SOURCE TO SUPPLY MAKEUP WATER TO SAID HOT WATER COMPARTMENT, A SECOND POSITION CLOSING SAID LATERAL TUBE AND CONNECTING SAID HEAT EXCHANGER WITH SAID WATER SOURCE, AND A THIRD POSITION ISOLATING BOTH SAID HEAT EXCHANGER AND SAID LATERAL LINE FROM SAID WATER SOURCE AND CONNECTING SAID HEAT EXCHANGER WITH SAID LATERAL LINE FROM SAID WATER SOURCE AND CONNECTING SAID HEAT EXCHANGER WITH SAID LATERAL TUBE, WHEREBY EXCESS WATER RESULTING FROM EXPANSION THEREOF, AS THE WATER IS HEATED IN SAID HEAT EXCHANGER, IS DELIVERED TO SAID HOT WATER COMPARTMENT.