Metal halide lamp with dual starting electrodes and improved mai

Details Metal halide lamp with dual starting electrodes and improved mai Metal halide lamp with dual starting electrodes and improved mai

1990-01-23

1991-02-12

Groody, James J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural cathode and/or anode discharge device load

315 60, 315 74, 315124, H01J 2900

Patent

active

049927035

ABSTRACT:
A metal halide high intensity discharge lamp having an arc tube assembly including a pair of discharge electrodes and a pair of starting electrodes. Each starting electrode is adjacent a respective discharge electrode. During starting, the lamp makes the glow discharge to arc discharge transition in a substantially shorter time than a lamp with a single starting electrode, and exhibits a substantially improved lumen maintenance.

REFERENCES:
patent: 2517126 (1950-08-01), Macksoud
patent: 3275397 (1966-09-01), Cushing
patent: 3714494 (1973-01-01), Nakamura
patent: 4097777 (1978-06-01), Bacharowski
patent: 4156830 (1979-05-01), Strauss et al.
patent: 4258289 (1981-03-01), Michsal
patent: 4529914 (1985-07-01), Kaneda
High Pressure Mercury Vapour Lamps and Their Applications, Ed. by W. Elenbaas (1965), pp. 114-115.

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