Low-pressure sodium discharge lamp having a collar-like heat shi

Details Low-pressure sodium discharge lamp having a collar-like heat shi Low-pressure sodium discharge lamp having a collar-like heat shi

1987-09-29

1989-02-28

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313 43, 313492, H01J 6134, H01J 6152

Patent

active

048088773

ABSTRACT:
The low-pressure sodium discharge lamp according to the invention has a U-shaped discharge tube (1) with seals (4, 5), through which current-supply conductors (6, 7) extend to electrodes (8, 9). A supporting member (14) fixes the discharge tube (1) in an outer bulb (10). Upright collars (18, 19) at the supporting member (14), which surround the seals (4, 5) throughout their lengths, prevent the discharge tube from becoming leaky at high-frequency operation and the lamp from reaching the end of its life prematurely.

REFERENCES:
patent: 2267090 (1941-12-01), Freeman
patent: 2562887 (1951-08-01), Beese
patent: 4129800 (1978-12-01), Van Benthem et al.
patent: 4536678 (1985-08-01), Bouchard et al.
patent: 4588919 (1986-05-01), Kroontje et al.
patent: 4600856 (1986-07-01), Bouchard et al.
patent: 4636691 (1987-01-01), de Man

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