Dual duct air conditioning 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 THE SAID ROOM FOR PROVIDING A THERMOSTATIC SIGNAL CORRESPONDING TO THE AIR TEMPERATURE WITHIN SAID ROOM; A FLOW REGULATING MEANS FOR PROVIDING A FLOW REGULATING SIGNAL DIRECTLY CORRESPONDING TO THE CUMULATIVE FLOW RATE OF SAID FROM BOTH SAID FIRST OUTLET AND SAID SECOND OUTLET; THE IMPROVEMENT COMPRISING: SIGNAL SWITCHING MEANS ADAPTED IN SAID USUAL CONDITION TO DELIVER AS AN OUTPUT SIGNAL SAID FLOW REGULATING SIGNAL TO A SELECTED ONE OF THE SAID FIRST AND SECOND VALVE MEANS, AND ADPATED IN SAID ALTERNATIVE CONDITION TO DELIVER AS AN OUTPUT SIGNAL THE SAID THERMOSTATIC SIGNAL TO THE SAID SELECTED ON OF SAID FIRST AND SECOND VALVE MEANS; SIGNAL DELIVERY MEANS FOR DELIVERING THE SAID THERMOSTATIC SIGNAL TO THE NON-SELECTED ONE OF THE SAID FIRST AND SECOND VALVE MEANS; SAID SELECTED VALVE MEANS BEING OPERABLE BETWEEN A FULL-OPEN AND A FULL-CLOSED POSITION IN RESPONSE TO ACTUATING SIGNALS OVER A FIRST RANGE OF PRESSURES;= THE SAID NON-SELECTED VALVE MEANS BEING OPERABLE BETWEEN A FULL-OPEN AND A FULL-CLOSED POSITION IN RESPONSE TO ACTUATING SIGNALS OVER A SECOND RANGE PRESSURE;