Lighting unit

Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Filament or electric heater in series with a discharge...

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Details

313246, 313355, 315241R, H01J 744

Patent

active

045742197

ABSTRACT:
A lighting unit having a filament serving as a supplementary light source, an improved gas discharge tube serving as a main light source having improved electrodes and an improved ballast circuit operating in cooperation with the improved electrodes is disclosed. Various embodiments of the improved electrodes and various embodiments of the improved ballast circuits are disclosed. The improved ballast circuit operating in cooperation with the improved electrodes provides for thermionic arc conditions in the operation of the gas discharge tube substantially immediately after the application of voltage applied to the unit.

REFERENCES:
patent: 3364375 (1968-01-01), McCarty
patent: 4136227 (1979-01-01), Saito
patent: 4232243 (1980-11-01), Rigden
patent: 4518890 (1985-05-01), Taguchi et al.
patent: 4533852 (1985-08-01), Frank et al.
Vacuum Breakdown Observations on a W-ThO.sub.2 Cerinet Cathode by Bouchard et al., 1970 Conference on Electron Device Techniques pp. 23, 24 Sep. 1970, New York.

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