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
1986-07-08
1987-10-13
Dixon, Harold
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Plural discharge devices and/or rectifiers in the supply...
315206, 315208, 315223, 315244, 331113A, H05B 3700
Patent
active
047001127
ABSTRACT:
A flourescent lamp lighting circuit comprising a rectifying circuit and an oscillatory circuit. The rectifying circuit comprises a rectifier bridge, capacitors and coils to rectify the local alternating power supply to direct power supply and provide rectified electrical power to the oscillatory circuit. The oscillatory circuit comprises two transistors and an L-C circuit which, taken together, form an astable circuit which generates and maintains oscillations. The frequency of the oscillations is determined by the nature of L-C circuits. The ON's and OFF's of the transistors are controlled by induction coils within which currents are induced by the variation of magnetic flux in the inductor coil of the L-C circuit. The high frequency oscillations in the oscillatory circuit induce high frequency electrical signals on a secondary coil which then lights the fluorescent lamp.
REFERENCES:
patent: 3008068 (1961-11-01), Wilting et al.
patent: 3247422 (1966-04-01), Schultz
patent: 3395315 (1968-07-01), Fontaine
patent: 3973165 (1976-08-01), Hester
patent: 4109307 (1978-08-01), Knoll
patent: 4544862 (1985-10-01), Yamazaki et al.
patent: 4562382 (1985-12-01), Elliott
Dixon Harold
Rosenberg Morton J.
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