Method and apparatus for preventing carbon deposits in electrical apparatus containing electronegatively substituted dielectric fluids

Claim 1

AN ELECTRICAL APPARATUS COMPRISING, IN COMBINATION, A CLOSED, GAS-TIGHT CONTAINER, AN ELECTRIC DEVICE THEREIN HAVING AT LEAST ONE CONDUCTING MEMBER FROM WHICH AN ELECTRICAL DISCHARGE MAY OCCUR, AND AN ELECTRONEGATIVELY SUBSTITUTED DIELECTRIC FLUID MIXTURE IN SAID CONTAINER AND IN CONTACT WITH SAID CONDUCTING MEMBER, SAID ELECTRONEGATIVELY SUBSTITUTED DIELECTRIC FLUID MIXTURE CONSISTING ESSENTIALLY OF A CARBON CONTAINING FLUID SELECTED FROM THE GROUP CONSISTING OF TRIHALOMETHANE AND C1-C6 SATURATED PERHALOHYDROCARBON, WHEREIN SAID HALOGEN S OF ATOMIC NUMBER NOT MORE THAN 35 AND HAVING AT LEAST ONE FLUORINE ATOM, C2-C8 SATURATED PERFLUOROETHER, AND C3-C12 SATURATED PERFLUOROTERTIARY AMINE, AND FROM 1 TO 50 MOLE PERCENT OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE, NITRIC OXIDE AND NITROUS OXIDE.