Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Plural discharge devices and/or rectifiers in the supply...
Patent
1980-02-19
1982-03-16
Chatmon, Jr., Saxfield
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Plural discharge devices and/or rectifiers in the supply...
315DIG5, 315DIG7, 315276, 315206, 315239, 315278, H05B 3700, H05B 3900, H05B 4114
Patent
active
043203256
ABSTRACT:
A circuit for starting and ballasting a compact high-intensity arc discharge lamp. A filament connected in series with the arc lamp provides illumination during arc start-up and functions as a ballast during normal arc operation. An oscillatory starting circuit includes a transformer and a frequency-controlling ringing circuit, and applies starting voltage to the arc lamp until an operating arc is established. The circuit includes capacitor means for isolating the starting transformer from the operating path of the arc lamp, and further includes a voltage-doubling starting circuit and also a "keep-alive" feature which prevents the arc from extinguishing during power fluctuations.
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patent: 4240009 (1980-12-01), Paul
Chatmon, Jr. Saxfield
Fulmer Norman C.
General Electric Company
Kempton Lawrence R.
Schlamp Philip L.
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