Electrical apparatus

Claim 1

IN ELECTRICAL APPARATUS, THE COMBINATION COMPRISING, AN ENCLOSED CASING, A SOURCE OF HEAT DISPOSED IN THE ENCLOSED CASING, MEANS FOR DISSIPATING THE HEAT FROM SAID SOURCE COMPRISING A SUPPLY OF VAPORIZABLE FLUORINATED ORGANIC LIQUID COOLANT BOILING BETWEEN 50*C. AND 225* C. AND MEANS FOR APPLYING A LAYER OF THE FLUORINATED ORGANIC LIQUID COOLANT OVER SAID SOURCE OF HEAT TO COOL IT BY EVAPORATION OF THE FLUORINATED ORGANIC LIQUID COOLANT TO A CONDENSABLE VAPOR, THE VAPOR OF THE FLUORINATED ORGANIC LIQUID COOLANT HAVING AN EFFECTIVE DIELECTRIC STRENGTH, AN AUXILIARY CASING, PASSAGEWAYS HAVING COOLING SURFACES OF SUBSTANTIAL AREA CONNECTED IN COMMUNICATION BETWEEN THE ENCLOSED CASING AND THE AUXILIARY CASING, A NON-CONDENSABLE GAS DISPOSED IN THE AUXILIARY CASING AND SAID PASSAGEWAYS TO PROVIDE A COMPRESSIBLE CUSHION FOR THE CONDENSABLE VAPORS FROM THE ENCLOSED CASING TO THEREBY PERMIT THE CONDENSABLE VAPORS TO ENTER SAID PASSAGEWAYS AS THE PRESSURE OF THE VAPORS WITHIN THE CASING INCREASES ABOVE A PREDETERMINED VALUE, THE NON-CONDENSABLE GAS, THE AUXILIARY CASING AND SAID PASSAGEWAYS COOPERATING WITH THE FLOW OF CONDENSABLE VAPORS TO PROVIDE FOR EXPOSING ONLY SUFFICIENT COOLING SURFACE TO CONTROL THE RATE OF CONDENSATION OF THE CONDENSABLE VAPORS TO MAINTAIN IN THE ENCLOSED CASING A SUFFICIENTLY HIGH VAPOR PRESSURE OF THE CONDENSABLE VAPORS TO EFFECT AN ADEQUATE DIELECTRIC STRENGTH OF THE CONDENSABLE VAPORS, AND A COOLING LIQUID MEDIUM DISPOSED ABOUT SAID PASSAGEWAYS IN CONTACT THEREWITH TO DISSIPATE HEAT FROM THE CONDENSABLE VAPORS AS THEY ENTER SAID PASSAGEWAYS, THE COOLING EFFECT OF THE LIQUID MEDIUM ON THE CONDENSABLE VAPORS INCREASING AS THE CONDENSABLE VAPORS COMPRESS THE NON-CONDENSABLE GAS AND FILL SAID PASSAGEWAYS.