Patent ID: 6617804
Filing Date: 2003-09-09
Classification: H01T

Abstract:
A gas filled switching electric discharge tube comprising:a cylindrical body made of insulating material; a first electrode and a second electrode for airtightly closing both ends of the cylindrical body so that an electric discharge gap is formed between a first electrode face of the first electrode and a second electrode face of the second electrode, and an airtightly closed space formed in the cylindrical body is filled with gas; metalized faces formed on both end faces of the cylindrical body, the first electrode and the second electrode being joined to the cylindrical body on both end faces of the cylindrical body; first trigger wires formed on an inner wall face of the cylindrical body, connected with the metalized faces; second trigger wires formed on the inner wall face of the cylindrical body, not connected with the metalized faces; a number of the second trigger wires being larger than a number of the first trigger wires; an interval of the electric discharge gap being made to be larger than a distance from the second trigger wires to the first electrode face or the second electrode face; and a plurality of recess portions being formed on the first electrode face of the first electrode or the second electrode face of the second electrode.