Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Filament – electric heater – or resistance in shunt with the...
Patent
1976-11-22
1978-06-06
Smith, Alfred E.
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Filament, electric heater, or resistance in shunt with the...
313185, 313225, 313226, 313212, 313217, 313218, 313 38, 313338, 313339, 313341, H01J 1734, H01J 115, H01J 1720, H01J 6116
Patent
active
040938930
ABSTRACT:
A short arc fluorescent lamp comprises an envelope having dimensions compatible with existing incandescent lamp luminaires. A radio frequency power supply, enclosed within the lamp base structure, reduces anode voltage drop to increase lamp efficacy. Cathode voltage drop and sputtering are reduced by compact hollow cathode assemblies, including centrally disposed filaments, which are positioned at opposite ends of a tubular envelope assembly having a large ratio of diameter to length. Diffuse cathode emission allows operation with low pressure, low atomic weight fill gas which further increases luminous efficiency.
REFERENCES:
patent: 2025585 (1935-12-01), Fonda et al.
patent: 2810090 (1957-10-01), MacNair
patent: 3521120 (1970-07-01), Anderson
patent: 3849699 (1974-11-01), Roche
patent: 3883764 (1975-05-01), Johnson et al.
Cohen Joseph T.
Cutter Lawrence D.
General Electric Company
Roberts Charles F.
Smith Alfred E.
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