Patent ID: 6741036
Filing Date: 2004-05-25
Classification: H01J

Abstract:
A gas discharge tube having a sealed envelope at least a part of which transmits light, saidsealed envelope being filled with a gas and being provided with anode and cathode sections disposed therein, electric discharge being generated between said anode and cathode sections, so that the light-transmitting part of said sealed envelope emits predetermined light outside, said sealing envelope comprising: a stem for securing said cathode and anode section by way of respective stem pins independent from each other; and a side tube, at least part of which is made of a light transmitting material, surrounding said cathode and anode sections and being joined to said stem, and wherein said stem has an integrally formed flange portion extending in a direction perpendicular to an axial direction of said side tube and having a positioning reference portion when attaching said gas discharge tube to an external fixing member.