Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Discharge device and/or rectifier in the primary circuit of...
Patent
1976-03-01
1977-10-11
Chatmon, Jr., Saxfield
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Discharge device and/or rectifier in the primary circuit of...
315DIG2, 315DIG7, 315209R, 315283, H05B 3700
Patent
active
040538133
ABSTRACT:
A circuit for operating an electric discharge lamp comprises an inductor in series with the lamp, a capacitor in parallel with the lamp, and a transistorized inverter circuit connected in series with the inductor and the lamp. The operating frequency of the inverter increases with increasing load. A harmonic of the inverter output frequency is initially established at the resonant frequency of the inductor and capacitor to produce a high open circuit lamp starting voltage. Upon establishment of an electrical discharge in the lamp, the inverter frequency increases to provide efficient, stable lamp operation.
REFERENCES:
patent: 2964676 (1960-12-01), Davies et al.
patent: 2971166 (1961-02-01), Schultz
patent: 3008068 (1961-11-01), Wilting
patent: 3084283 (1963-04-01), Grunwaldt
patent: 3146406 (1964-08-01), Wilting
patent: 3611021 (1971-10-01), Wallace
patent: 3723848 (1973-03-01), Miller
patent: 3754160 (1973-08-01), Jensen
Jahns Thomas M.
Kornrumpf William P.
Chatmon, Jr. Saxfield
Cohen Joseph T.
General Electric Company
Haken Jack E.
Squillaro Jerome C.
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