Electric lamp and discharge devices – With gas or vapor – Envelope with particular structure
Patent
1994-01-19
1995-11-14
Yusko, Donald J.
Electric lamp and discharge devices
With gas or vapor
Envelope with particular structure
313325, 361120, H01J 6135
Patent
active
054669898
ABSTRACT:
A discharge tube according to the present invention is constructed such that it includes a cylindrical container made of an insulation tube, a pair of discharge electrodes provided at opposite ends of the container, a plurality of insulation coated lines containing a gas-ionization accelerator therein, which insulation coated lines being provided in the grooves formed on the inner surface of the container covering the regions surrounding a cathode and a discharge space therein in a substantially same distance from a center axis of the container, wherein the container further comprises a flange portion formed at the cathode-side thereof in such a way that it protrudes inwardly, and the insulation coated lines are provided on the inner surface of the container except the inner side of the flange portion. The discharge tube as constructed above shows a stabilized discharge inception characteristics regardless of the frequency of repetitive discharge, and is also capable of avoiding an inner creeping discharge even when the discharge is repeated for a long time, yet providing a constant life time.
REFERENCES:
patent: 5103135 (1992-04-01), Lange et al.
patent: 5235247 (1993-08-01), Shishido et al.
Mitani Tetsuya
Sato Takashi
Suzuki Takahisa
Tsuchiya Hiromitsu
Patel N. D.
Yazaki -Corporation
Yusko Donald J.
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