Overvoltage discharger for coaxial cables and method of making same

摘要

A bi-polar discharger for a coaxial conducting cable is formed by threading rod elements into the ends of a central passage through an internal electrode so as to be electrically conductive therewith. A casing around the internal electrode comprises a cylindrical outer electrode closed at each end by a bead of glass or ceramic which is fitted within an outer metal ring and the casing is sealed with a controlled atmosphere of an inert gas at low pressure by sealing of the outer rings to the cylindrical external electrode and sealing of the rod elements within the beads.