Fluorescent lamp electrodes

Details Fluorescent lamp electrodes Fluorescent lamp electrodes

1984-01-03

1985-06-11

Moore, David A.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313618, 313339, H01J 61067

Patent

active

045231257

ABSTRACT:
A novel electrode structure for a fluorescent lamp, particularly one employing a low discharge gas pressure, comprises a directly heated hollow cathode interiorly coated with an emissive mixture. In accordance with one embodiment of the present invention, a flat metal ribbon is wound to form a helix which is heated resistively. In accordance with another embodiment of the present invention, a flat metal ribbon is wound in a flat spiral configuration and likewise heated resistively. In yet another embodiment of the present invention, a fluorescent lamp electrode comprises a metal cylinder heated directly by a filamentary coil disposed about the circumference of the cylinder and electrically insulated therefrom.

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patent: 3883764 (1975-05-01), Johnson et al.
patent: 3919579 (1975-11-01), Lemmers
patent: 4117374 (1978-09-01), Witting

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