Metal halide discharge lamp

Details Metal halide discharge lamp Metal halide discharge lamp

1985-09-11

1986-06-10

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Having a particular total or partial pressure

313620, 313634, H01J 6112, H01J 6104, H01J 6130

Patent

active

045945292

ABSTRACT:
A gas discharge lamp according to the invention has an at least approximately rectilinear and contracted arc and a high efficiency even in a horizontal operating position. Consequently, the lamp is suitable for use, when arranged in a reflector, as a vehicle headlight lamp. The lamp comprises an ionizable filling of rare gas, mercury, and metal iodide, the quantity of mercury being dependent upon the inner diameter D of the lamp envelope (1), the distance d between the tips of the electrodes (2), and the distance l over which the electrodes project into the lamp envelope. The values of D, d, l and the wall thickness t of the lamp envelope lie within indicated limits. The lamp, which may be provided with a screen, may have a lamp cap or may be incorporated into a reflector with a front pane.

REFERENCES:
patent: 2869011 (1959-01-01), Verbeck
patent: 3259777 (1966-07-01), Fridrich
patent: 3898504 (1975-08-01), Akutsu et al.
patent: 4029985 (1977-06-01), Rachel
patent: 4161672 (1979-07-01), Cap et al.

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