Cold gas supply system

Claim 1

VENTILATING APPARATUS FOR AN AVIATOR''S SUIT, COMPRISING IN COMBINATION A HEAT EXCHANGER, SAID EXCHANGER INCLUDING FIRST AND SECOND FLUID SIDES RESPECTIVELY FOR COMPRESSED FLUID TO BE COOLED AND COOLANT FLUIDS, FIRST CONDUIT MEANS FOR PASSING SAID COMPRESSED FLUID TO BE COOLED FROM A PRESSURE SOURCE TO AND FROM THE FIRST FLUID SIDE OF SAID HEAT EXCHANGER, A COMPRESSED COOLANT STORAGE CONTAINER, A SUPPLY OF COMPRESSED LIQUEFIED LOW-TEMPERATURE COOLANT FLUID IN SAID STORAGE CONTAINER, SECOND CONDUIT MEANS CONNECTING SAID SUPPLY OF COOLANT TO THE SECOND SIDE OF SAID HEAT EXCHANGER, COOLANT FLUID FLOW CONTROL MEANS IN SAID SECOND CONDUIT UPSTREAM OF SAID HEAT EXCHANGER, SAID SECOND CONDUIT MEANS CONNECTING WITH SAID FIRST CONDUIT MEANS AFTER DIRECTING SAID COOLANT THROUGH SAID HEAT EXCHANGER, A THERMOSTAT DEVICE IN SAID FIRST CONDUIT MEANS DOWNSTREAM OF SAID HEAT EXCHANGER RESPONSIVE TO VARIATIONS IN TEMPERATURE OF THE COOLED FLUID FLOWING FROM SAID HEAT EXCHANGER, A COOLANT FLOW-CONTROL VALVE MOVABLE BETWEEN CONTROLLING POSITIONS IN SAID SECOND CONDUIT MEANS DOWNSTREAM OF SAID HEAT EXCHANGER, AND MEANS OPERATIVELY CONNECTING SAID THERMOSTAT AND SAID FLOW-CONTROL VALVE TO CONTROL THE FLOW OF COOLANT INTO ADMIXTURE WITH SAID COOLED FLUID.