Metal halide headlamp

Details Metal halide headlamp Metal halide headlamp

1998-02-04

1999-08-10

Patel, Ashok

Electric lamp and discharge devices

With gas or vapor

Having particular electrode structure

313344, 313638, 313574, 313332, H01J 6100

Patent

active

059363509

ABSTRACT:
A metal halide headlamp comprising an electrode and a coil wrapping around said electrode to prevent the occurrence of cracks in a sealing portion, in which the diameter d.sub.0 of said electrode, the cross-section S of said electrode including said coil, the inner diameter ID of said coil, the pitch P of said coil, the distance L between an end of said coil and a metal foil, and the amount of metal halides with a NaI-to-ScI.sub.3 ratio are specifically limited. Thereby, the prior art problems, i.e., changes in the lamp characteristics, the degradation of durability, and so on, can be solved.

REFERENCES:
patent: 5107165 (1992-04-01), Dever et al.
patent: 5847510 (1998-12-01), Goelling et al.

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