High-pressure sodium discharge lamp having reduced lamp voltage

Details High-pressure sodium discharge lamp having reduced lamp voltage High-pressure sodium discharge lamp having reduced lamp voltage

1986-06-03

1988-07-05

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313546, 313551, 313552, H01J 6128, H01J 6134

Patent

active

047557109

ABSTRACT:
The invention relates to a high-pressure sodium discharge lamp intended to be operated in conjunction with an external starter or with an internal starter without a glow discharge. The lamp has an outer bulb which is provided with a lamp cap and encloses an evacuated space in which a discharge vessel is arranged. According to the invention, the space enclosed by the outer bulb further accommodates a closed holder, whose wall mainly comprises glass-forming constituents and which contains at least helium. Thus, it is achieved that the lamp has a strongly reduced increase in lamp voltage during the life.

REFERENCES:
patent: 3721846 (1973-03-01), Cohen
patent: 3932781 (1976-01-01), Peeters et al.

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