Patent ID: 6783401
Filing Date: 2004-08-31
Classification: H01B,H01R,H03K,Y10S

Abstract:
An electrical feedthrough, or bushing, comprising:a solid dielectric insulator having an inner face and an outer face, the inner face arranged between a center conducting electrode and an outer conducting flange, housing, or enclosure, a conductive material provided on the inner face of the solid dielectric insulator wherever the inner face is to be directly adjacent to the center conducting electrode, wherein the conductive material on the inner face is electrically coupled to the center conducting electrode by direct contact with a supporting conducting flange or some other means; and an embedded conductive material configured within a circumferentially smoothly contoured channel at a predetermined distance on the outer face of the solid dielectric insulator, wherein the embedded conductive material is electrically coupled to a wall of the endosure so as to concentrate the electric fields inside the solid dielectric material and reduce the electric field concentration in the vicinity of a triple-point region where the embedded conductive surface meets the solid-dielectric insulator and a second dielectric contained within the enclosure, thereby eliminating an electric field that would otherwise exist in the gap between the center conducting electrode and the solid dielectric insulator, thus avoiding electrical breakdown of any weaker dielectric, typically gas or liquid, that might reside in the gap or void region between the center conducting electrode and the solid dielectric insulator.