High-voltage electrical insulating bushing

Claim 1

A HIGH VOLTAGE STANDOFF INSULATOR SUITABLE FOR MAINTAINING HIGH ELECTRICAL POTENTIALS WITHIN A VACUUM COMPRISING A HIGH VOLTAGE TERMINAL, AN INSULATING MEMBER ADAPTED TO POSITION SAID TERMINAL A FIXED DISTANCE FROM A GROUND PLANE, SAID INSULATING MEMBER CONSISTING OF A PLURALITY OF ANNULAR INSULATING ELEMENTS AND A PLURALITY OF ELECTRICALLY CONDUCTING RING SHAPED ELEMENTS ALTERNATELY ARRANGED IN CONTIGUOUS RELATIONSHIP AND COOPERATING WITH SAID HIGH VOLTAGE TERMINAL TO HERMETICALLY ENCLOSE A VOLUME THEREIN, MEANS FOR SECURING SAID INSULATING MEMBER TO SAID GROUND PLANE, RESISTANCE MENS COMPRISING A TUBE OF INSULATING MATERIAL HAVING A RESISTIVITY OF NOT MORE THAN 10**12 OHM CM. DISPOSED WITHIN SAID INSULATING MEMBER, SAID RESISTANCE MEANS BEING IN ELECTRICAL CONTACT WITH SAID PLURALITY OF ELECTRICALLY CONDUCTIVE RING SHAPED ELEMENTS AND ADAPTED TO PROVIDE A UNIFORM VOLTAGE GRADIENT THEREALONG, AND MEANS FOR MAINTAINING A PRESSURIZED INSULATING FLUID WITHIN SAID ENCLOSED VOLUME.