High-pressure discharge lamp

Details High-pressure discharge lamp High-pressure discharge lamp

1989-07-12

1991-04-16

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313560, 315 73, H01J 102

Patent

active

050085832

ABSTRACT:
The invention relates to a high-pressure sodium discharge lamp provided with a discharge vessel having a longitudinal axis 1 and a diameter D. The discharge vessel is enclosed by an outer envelope. Within the outer envelope a starting circuit is arranged, which has at least a glow starter. According to the invention, the outer envelope is a clear outer envelope and the glow starter is arranged so as to be laterally displaced over a distance of at least D/2 with respect to the discharge vessel. Moreover, the glow starter is shielded for the major part with respect to the discharge vessel by means of a heat shield.

REFERENCES:
patent: 4117370 (1978-09-01), Jacobs et al.
patent: 4144475 (1979-03-01), Delen et al.

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