Glow discharge starter having dual gaps

Details Glow discharge starter having dual gaps Glow discharge starter having dual gaps

1990-11-30

1991-10-15

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Negative or cathode glow device

313620, 313621, H01J 744

Patent

active

050577417

ABSTRACT:
A glow discharge starter having an hermetically sealed envelope containing an ionizable medium, a bimetallic electrode including a bimetallic element, and a counter electrode. The bimetallic element has a free end adapted to form first and second discharge gaps with the counter electrode. The first discharge gap has a spacing which varies during operation of the glow discharge starter. The spacing of the second discharge gap remains relatively constant. Problems associated with high ambient temperatures can be overcome by increasing the initial spacing of the first discharge gap without affecting the electrical breakdown voltage of the glow discharge starter. In accordance with a preferred embodiment, the free end of the bimetallic element has a first portion substantially parallel to the counter electrode and a second portion substantially perpendicular to the counter electrode. Preferably, the initial spacing of the first discharge gap measured at 25 degrees Celsius is within the range of from about 0.020 inch to about 0.030 inch. The spacing of the second discharge gap is within the range of from about 0.006 inch to about 0.010 inch.

REFERENCES:
patent: 4845406 (1989-07-01), Barakitis et al.
patent: 4938727 (1989-07-01), Barakitis et al.
patent: 4970425 (1990-11-01), Barakitis
patent: 5001391 (1991-03-01), Kling et al.

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