Annular fluorescent lamp

Details Annular fluorescent lamp Annular fluorescent lamp

1988-03-11

1989-05-23

Lazarus, Ira S.

Illumination

Curvilinear light source

362260, 313493, F21S 500

Patent

active

048335746

ABSTRACT:
Improved performance and compact size in an annular fluorescent lamp are achieved by providing two or more annular glass tube sections disposed one above another and connected to provide a single arc discharge path from a filament at one end of the lowermost tube section to a second filament at one end of the uppermost tube section. These multi-layer fluorescent lamps are particularly well suited for use in conjunction with internal reflectors, and with internal and external reflectors. The internal reflector may serve as a housing, or as part of a housing, for associated electrical components.

REFERENCES:
patent: 113550 (1939-02-01), Clark
patent: 1870147 (1932-08-01), Smally
patent: 2473878 (1949-06-01), Greiner
patent: 2480301 (1949-08-01), Moretz
patent: 2878372 (1959-03-01), Fry
patent: 3899712 (1975-08-01), Witting
patent: 4225905 (1980-09-01), Moriyama et al.
patent: 4644224 (1987-02-01), Saita et al.

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