Arc discharge lamp with ultraviolet radiation starting source

Details Arc discharge lamp with ultraviolet radiation starting source Arc discharge lamp with ultraviolet radiation starting source

H - Electricity

01

J

313/10, 313/137,

H01J 61/54 (2006.01) H01J 65/00 (2006.01)

Patent

CA 1303117

D-87-1-001 PATENT ABSTRACT A metal halide arc discharge lamp comprises an arc tube containing a chemical fill including mercury and metal halides and having first and second electrodes respectively sealed at opposite ends thereof. An outer envelope surrounds the arc tube and has first and second terminals for electrical connection thereto. A source of ultraviolet radiation is provided within the outer envelope proximate the arc tube for producing radiation which illuminates the path between the electrodes of the arc tube to decrease the amount of time for generating a gaseous discharge therebetween. The ultraviolet light source includes an envelope of ultraviolet light transmitting material containing a fill material and having a single electrode sealed in one end thereof. The single electrode is electrically coupled to one electrode of the arc tube. A portion of the envelope of the ultraviolet light source is capacitively coupled to the other electrode of the arc tube such that the source produces ultraviolet radiation during lamp starting when the first and second terminals of the lamp are energized.

578133

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