Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1978-01-23
1979-06-12
Demeo, Palmer C.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313113, 313208, 313209, H01J 61067, H01J 6142, H01J 6154
Patent
active
041581539
ABSTRACT:
A new low voltage fluorescent light bulb is described. The bulb operates in a screw type socket on single-phase alternating current. No ballast is required. The lumen output of the new bulb is more than twice that of a filament type light bulb of equal input electrical energy. It has a life expectancy greater than 25,000 hours of useful operation. Hence, besides a substantial savings of electrical energy, the bulb pays for itself over time. Also, this new fluorescent light bulb saves the electrical energy and materials that would be entailed if the filament type of light bulb remains in use over the same extended time period. The new bulb is an ionic gas and mercury vapor discharge device of the uniformly restricted positive column type. However, a plurality of paired and matched self-polarizing positive column discharge tubes are used. The latter as connected, electrically, in a series-parallel manner are using the full wave of the input current; each positive column discharge tube becomes one of unidirectional current flow. It uses only one-half of the input wave, and its other matching and polarized tube takes the other half of the same input wave. This presents one attractive feature, or that of power-factor correction. (Power-factor losses are inherent to all other types of fluorescent lighting devices because of the necessity of the auxilliary ballast equipment.)
REFERENCES:
patent: 2561868 (1951-07-01), Jenkins et al.
patent: 2847605 (1958-08-01), Byer
patent: 2911376 (1959-11-01), Rudolph
DeMeo Palmer C.
O'Connell Robert F.
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