Low-pressure sodium vapor discharge lamp

Details Low-pressure sodium vapor discharge lamp Low-pressure sodium vapor discharge lamp

1981-02-02

1983-08-30

Demeo, Palmer C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Plural diverse optical devices

313113, 313116, 313610, H01J 6122, H01J 6134, H01J 6174, H01J 516

Patent

active

044019149

ABSTRACT:
Low-pressure sodium vapor discharge lamp comprising a hollow inner member surrounded by an outer member, the wall of at least one of the members having grooves and the members of that portion, located between the grooves, extending to or to near the wall of the other member and a discharge space being formed wherein a discharge path, folded by means of the grooves, is present, the portions located between the grooves and facing the wall of the other member and extending to or to near the wall of the other member being provided with intervening portions extending in parallel with that wall.

REFERENCES:
patent: 2001501 (1935-05-01), Ruttenauer et al.
patent: 2194300 (1940-03-01), Found
patent: 2200940 (1940-05-01), Uyterhoeven et al.
patent: 2457503 (1948-12-01), Singer
patent: 3457447 (1969-07-01), Menelly et al.
patent: 3956656 (1956-05-01), Sprengers
patent: 4095135 (1978-06-01), Yamazaki et al.

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