Arc discharge lamp with improved starting capabilities, improved

Details Arc discharge lamp with improved starting capabilities, improved Arc discharge lamp with improved starting capabilities, improved

1982-06-11

1985-02-05

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313621, H01J 6130, H01J 6132

Patent

active

044980272

ABSTRACT:
A line-of-sight arched arc tube of an arc discharge lamp; e.g., a metal halide arc discharge lamp for horizontal operation having an arched upper wall to accommodate the bowing of the arc discharge during full temperature and pressure operation of the lamp and a lower wall of lesser curvature to accommodate the arc discharge during lamp start and warm-up. The curvature of the lower wall is such that there is a straight line-of-sight between the primary electrodes without being impeded by the lower wall of the arc tube and such that temperature profiles over the body of the arc tube are optimized during full temperature and pressure operation of the lamp.

REFERENCES:
patent: 2190657 (1940-02-01), Germer
patent: 2205000 (1940-06-01), Spanner
patent: 3858078 (1974-12-01), Koury
patent: 3900237 (1975-08-01), Marcucci
patent: 4056751 (1977-11-01), Gungle et al.
Koury et al., "A New Generation of Metal Halide Lamps", Journal of the IES, vol. 4, No. 2, pp. 106-110, Jan. 1975.

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