Electric lamp and discharge devices: systems – Pulsating or a.c. supply
Patent
1994-05-20
1995-07-25
Neyzari, Ali
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
315209R, 313631, 313634, H05B 4116, H01J 1704
Patent
active
054365333
ABSTRACT:
To prevent bowing of the arc of a high-pressure discharge lamp operated horizontally, the lamp is supplied with alternating current of between 10 kHz and 100 kHz, in which the frequency and wave shape of the alternating current portions of the supply are so selected that standing radial acoustic resonances will be formed within the discharge medium or fill in the discharge vessel, which standing radially directed acoustic resonances suppress or counteract bending of the discharge arc due to convection phenomena.
REFERENCES:
patent: 4170746 (1979-10-01), Davenport
patent: 4527097 (1985-07-01), Vander Heijden et al.
patent: 4983889 (1991-01-01), Roberts
patent: 5121034 (1992-06-01), Allen et al.
"Techn.-wissensch. Abhandlg. der OSRAM-Gesellschaft" (Technological-scienic papers of the OSRAM company), vol. 12, pp. 394-407, publ. by Springer, article by Statnic Zum Hochfrequenzbetrieb von Halogen-Metalldampflampen kl. Leistung (High-frequency operation of metal vapor halide lamps of low power).
"Journal of the Illuminating Engineering Society", vol. 21, No. 1, Dec. 1992, New York, pp. 60-68, Rutan et al., Practical application of pulsed high pressure sodium lamp technology, p. 62, right col., line 26; p. 63, left col., line 23.
Bernitz Franz
Fromm Dietrich
Seehawer Juergen
Neyzari Ali
Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbH
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