Multiple-tube compact low-pressure discharge fluorescent lamp

Details Multiple-tube compact low-pressure discharge fluorescent lamp Multiple-tube compact low-pressure discharge fluorescent lamp

1987-12-29

1989-08-01

Wieder, Kenneth

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313595, 313634, 313600, 315 60, H01J 6132, H01J 6154

Patent

active

048535915

ABSTRACT:
At least two discharge units (2, 3; 14, 15, 16; 21, 22, 23, 27, 28, 29) are ocated adjacent each other, each of the discharge units preferably including a unitary U-shaped tube having two longitudinal leg portions (2a, 2b; 3a, 3b) extending parallel to each other, and a cross portion (4, 5) connecting the leg portions at the base of the U. The free ends of the U are pinch-sealed and air-tight, and the two discharge units are so positioned relative to each other that the longitudinal leg portions extend parallel to each other, selectively, in a single plane, in parallel planes, or angled with respect to each other; the cross elements are located at adjacent end portions of the respective units. One filament-carrying electrode is sealed into one free end of one leg of one U-shaped tube of one unit, and another filament-carrying electrode is sealed into a free end of one leg of another unit; the units are cross-connected to provide a continuous discharge path, the cross connection being effected adjacent pinch-sealed ends of those legs of the U-shaped tubes which do not have filament-carrying electrodes sealed therein. To facilitate lamp starting, an auxiliary electrode (116) is pinch-sealed adjacent the cross connection, and coupled by an impedance (117) to the "hot" filament-carrying electrode.

REFERENCES:
patent: 4481442 (1984-11-01), Albrecht et al.
patent: 4524301 (1985-06-01), Cohen et al.
patent: 4530710 (1985-07-01), Dullea et al.
patent: 4539510 (1985-09-01), Bouchard
patent: 4611148 (1986-09-01), Kato et al.

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