High pressure metal halide lamp with electron collector

Details High pressure metal halide lamp with electron collector High pressure metal halide lamp with electron collector

1975-01-13

1976-12-07

Demeo, Palmer C.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

313 25, 313184, 313198, 313229, H01J 6118, H01J 6154, H05B 3118

Patent

active

039959287

ABSTRACT:
A high pressure metal halide lamp comprises an outer envelope and an inner fused silica arc tube whose fill includes sodium iodide. Notwithstanding the use of a divided mount side-rod-less construction, the arc tube is subject to loss of sodium by electrolysis through the walls. The sodium loss is reduced by means of a collector wire within the outer envelope having a control potential thereon which shadows the current carrying lead wire in order to collect electrons that otherwise drift to the arc tube and promote electrolysis.

REFERENCES:
patent: 3424935 (1969-01-01), Gungle et al.
patent: 3619711 (1971-11-01), Freese, Jr.
patent: 3666986 (1972-05-01), Lake et al.
patent: 3883763 (1975-05-01), Kearney

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