Electrical switch having a trigger electrode whose sharp edges are sealed to suppress the formation of corona

Claim 1

A SWITCH COMPRISING A THIN SHEET OF CONDUCTING MATERIAL CONSTITUTING A TRIGGER ELECTRODE, TWO FURTHER ELECTRODE SANDWICHING SADI TRIGGER ELECTRODE IN FACE-TOFACE RELATIONSHIP THEREWITH AND OVERLAPPING AND EDGEPORTION THEREOF, SAID FURTHER ELECTRODES BEING INSULATEDLY SPACED FROM SAID TRIGGER ELECTRODE BY SOLID DIELECTRIC MATERIAL, A CONNECTION TO SAID TRIGGER ELECTRODE EXTENDING BEYOND SAID SOLID DIELECTRIC MATERIAL, SAID EDGE-PORTION OF THE TRIGGER ELECTRODE BEING SHARP THEREAROUND, AND A SUBSTANCE OF HIGH DIELECTRIC STRENGTH AND RESISTIVITY SEALING SAID SHARP-EDGE-PORTION TO SAID DIELECTRIC MATERIAL TO SUPPRESS THE FORMATION OF CORONA AT SAID EDGE-PORTION AND TO ALLOW AN INTENSE LOCAL ELECTRIC FIELD TO FORM AT SAID EDGEPORTION WHEN THE SWITCH IS IN OPERATION.