Space air conditioning system and thermostatic control therefor

Claim 1

A SPACE AIR CONDITIONING SYSTEM COMPRISING A TWOFACED CONTINUOUS BARRIER OF HIGH HEAT CONDUCTION ABILITY, MEANS FOR CIRCULATING AIR FROM SAID SPACE ALONG ONE FACE OF SAID BARRIER AND BACK TO SAID SPACE, A FIRST SOURCE OF WATER UNDER PRESSURE HEATED TO A TEMPERATURE REQUIRED FOR CONDITIONING SAID AIR, A SECOND SOURCE OF WATER UNDER PRESSURE COOLED TO A TEMPERATURE REQUIRED FOR CONDITIONING SAID AIR, MEANS FOR SELECTING SAID FIRST OR SAID SECOND SOURCE OF WATER TO BE CIRCULATED ALONG THE OTHER FACE OF SAID BARRIER TO CONDITION SAID AIR, A MAIN WATER VALVE MEANS INCLUDING A PILOT VALVE MEANS AND A THERMOSTAT MEANS FOR TOGETHER CONTROLLING THE OPENING OR CLOSING OF SAID MAIN WATER VALVE TO SUPPLY SAID SELECTED WATER AS REQUIRED ALONG SAID OTHER SIDE OF SAID BARRIER TO CONDITION SAID AIR, SAID PILOT VALVE MEANS INCLUDING A PILOT VALVE BIASED BY A PILOT VALVE LEVER SPRING TOWARD ITS POSITION OF OPENING THE MAIN WATER VALVE MEANS, SAID THERMOSTAT MEANS INCLUDING A FRAME, A BLADE LEVER RESILIENTLY HINGED AT ONE END TO SAID FRAME, A J-SHAPED BIMETAL BLADE RESILIENTLY HINGED, ADJACENT THE BEND WHICH IS BETWEEN ITS LONG AND SHORT ENDS, TO SAID FRAME NEAR SAID BLADE LEVER HINGE, SAID THERMOSTAT INCLUDING A TEMPERATURE SETTING EDGE CAM SLIDABLY POSITIONED ALONGSIDE SAID BLADE LEVER WITH THE SHORT END OF SAID BIMETAL BLADE FORMING A CAM FOLLOWER FOR SAID CAM TO INDICATE THE SELECTED HEATING OR COOLING WATER BEING CIRCULATED THROUGH SAID MAIN WATER VALVE, AND THE BIMETAL BLADE BEING ARRANGED TO URGE THE LONG END OF SAID BIMETAL BLADE AWAY FROM SAID SHORT END AND SAID BLADE LEVER ABOUT SAID HINGES WHEN THE TEMPERATURE OF SAID BIMETAL INCREASES, SAID THERMOSTAT INCLUDING AN ACTUATOR ROD IN TENSION BETWEEN SAID BLADE LEVER AND SAID PILOT VALVE LEVER, SAID BLADE LEVER AND SAID BIMETAL BLADE COOPERATING WITH MECHANICAL DETENT MEANS FOR ACTUATING SAID BLADE LEVER BY SAID BIMETAL BLADE WHEN THE CAM IS SET FOR HEATING AND THE AIR TEMPERATURE IN SAID SPACE INCREASES SUFFICIENTLY TO MOVE SAID PILOT VALVE LEVER BY SAID BLADE LEVER TO ITS POSITION OF CLOSURE OF SAID MAIN VALVE, AND SAID BIMETAL BLADE AND SAID BLADE LEVER INCLUDING COOPERATIVELY FORMED MAGNETIC DETENT MEANS FOR ATTRACTING SAID BLADE LEVER BY SAID MAGNETIC DETENT MEANS WHEN THE CAM IS SET FOR COOLING AND THE AIR TEMPERATURE IN SAID SPACE IS REDUCED SUFFICIENTLY TO MOVE SAID PILOT VALVE LEVER BY SAID BLADE LEVER TO ITS POSITION OF CLOSURE OF SAID MAIN VALVE.