Air conditioning

Claim 1

IN AN AIR CONDITIONING SYSTEM FOR MAINTAINING VARIOUS ZONES OF A BUILDING AT INDIVIDUALLY SELECTED TEMPERATURES, THE COMBINATION OF: A PLURALITY OF SEPARATE AIRCONDITIONING UNITS; POWER MEANS CONSTITUTING AN ELECTRIC POWER SUPPLY FOR SAID UNITS; AND A CONTROL SYSTEM INCLUDING A PLURALITY OF SWITCH ASSEMBLIES ASSOCIATED RESPECTIVELY WITH SAID UNITS, EACH OF WHICH COMPRISES A UNIT-CONTROL SWITCH AND IS CONNECTED TO SAID POWER MEANS, TIMER MOTOR-CAM MEANS INCLUDING A CAM AND MEANS TO TURN SAID CAN FROM A REST POSITION TO CLOSE SAID UNIT-CONTROL SWITCH, LATCH MEANS WHICH IS MOVED DURING THE OPERATION OF THE UNIT TO AND FROM A POSITION TO LATCH SAID CAM IN SAID REST POSITION, AND LATCH CONTROL MEANS TO RENDER SAID LATCH MEANS INEFFECTIVE AFTER SAID TIMER MOTOR-CAM MEANS HAS BEEN INOPERATIVE FOR A SUBSTANTIAL PERIOD OF TIME AND TO RENDER SAID LATCH MEANS EFFECTIVE AFTER SAID TIMER MOTORCAM MEANS HAS OPERATED FOR A PERIOD OF TIME, AND MANUAL MEANS TO RELEASE SAID LATCH MEANS.