Dual duct air conditioning system with seasonal changeover means

Claim 1

IN AN AIR DISTRIBUTING SYSTEM FOR A BUILDING ROOM INCLUDING SEPARATE CONDUIT MEANS EACH PROVIDING A SEPARATE STREAM OF CONDITIONED AIR TO SAID ROOM, ONE SAID SEPARATE STREAM BEING IDENTIFIED AS A FIRST STREAM AND BEING ALWAYS RELATIVELY COOL AND THE OTHER SAID SEPARATE STREAM BEING IDENTIFIED AS A SECOND STREAM AND BEING IN A USUAL CONDITION, RELATIVELY HOT AND, IN AN ALTERNATIVE CONDITION, BEING RELATIVELY COOL; A FIRST VALVE MEANS FOR REGULATING THE FLOW OF AIR FROM SAID FIRST STREAM THROUGH A FIRST OUTLET INTO SAID ROOM; A SECOND VALVE MEANS FOR REGULATING THE FLOW OF AIR FROM SAID SECOND STREAM THROUGH A SECOND OUTLET INTO SAID ROOM; A THERMOSTATIC MEANS RESPONSIVE TO THE TEMPERATURE WITHIN SAID ROOM FOR PROVIDING A THERMOSTATIC SIGNAL CORRESPONDING TO THE DIFFERENCE BETWEEN (A) THE AIR TEMPERATURE WITHIN SAID ROOM AND (B) A PREDETERMINED TEMPERATURE FOR SAID ROOM; A FLOW REGULATING MEANS FOR PROVIDING A FLOW-REGULATING SIGNAL CORRESPONDING TO THE CUMULATIVE FLOW RATE OF AIR FROM BOTH SAID FRIST OUTLET AND SAID SECOND OUTLET; SIGNAL SWITCHING MEANS ADAPTED IN SAID USUAL CONDITION TO DELIVER SAID FLOW REGULATING SIGNAL TO A SELECTED ONE OF SAID VALVE MEANS AND ADAPTED IN SAID ALTERNATIVE CONDITION TO DELIVER SAID THERMOSTATIC SIGNAL TO SAID SELECTED ONE OF SAID VALVE MEANS; SIGNAL DELIVERY MEANS FOR DELIVERING AT ALL TIMES THE SAID THERMOSTATIC SIGNAL TO THE OTHER OF SAID VALVE MEANS; AND MEANS FOR SHIFTING SAID SWITCHING MEANS FROM SAID USUAL CONDITION TO SAID ALTERNATIVE CONDITION AND VICE VERSA; WHEREBY IN SAID USUAL CONDITION, THE SAID CUMULATIVE FLOW RATE OF AIR FORM SAID OUTLETS IS SUBSTANTIALLY CONSTANT AS A RESULT OF INCREASE OF AIR FLOW FROM ONE SAID OUTLET BEING ACCOMPANIED WITH DECREASE OF AIR FLOW FROM THE OTHER SAID OUTLET AND VICE VERSA; AND WHEREBY IN SAID ALTERNATIVE CONDITION, THE SAID CUMULATIVE FLOW RATE OF AIR VARIES AS A RESULT OF CONCURRENT INCREASING FLOW OF AIR FROM BOTH SAID OUTLETS AND CONCURRENT DECREASING FLOW OF AIR FROM BOTH SAID OUTLETS ACCORDING TO THE SAID THERMOSTATIC SIGNAL APPLIED, IN SAID ALTERNATIVE CONDITION TO BOTH SAID VALVE MEANS.