Electric lamp and discharge devices: systems – Pulsating or a.c. supply – With power factor control device
Patent
1992-12-14
1995-02-07
Mis, David
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
With power factor control device
315 99, 315101, 315103, 315243, 315245, 315290, 315DIG5, H05B 4104, H05B 4118
Patent
active
053878493
ABSTRACT:
A ballast circuit for a fluorescent lamp including a magnetic choke electrically connected between the lamp and a power supply and an electronic starter circuit electrically coupled across said lamp, which ballast circuit is configured to provide a power factor of at least 90%. To this end, for certain lamps a power factor correcting capacitance is electrically connected across the power supply. For other lamps, a power factor correcting resistance is coupled between the ballasting capacitance and inductor so that the inductor and ballasting capacitance close to resonance.
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Affidavit of Richard G. Norris dated Jul. 29, 1992 with attached exhibits, of which Exhibit 1 is a photocopy of a document titled "TECCOR NEWS--THYRISTORS FOR IGNITION OF FLUORESCENT LAMPS" and allegedly published in the Dec., 1982 to Jan., 1983 time frame.
Mis David
Radionic Technology Incorporated
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