Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch cut-out
Patent
1980-10-27
1982-05-25
La Roche, Eugene R.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch cut-out
315220, 315289, 315DIG2, H05B 4114
Patent
active
043319050
ABSTRACT:
Starting and operating circuit for gaseous discharge lamps has device for quickly re-starting extinguished lamps while still hot. Circuit comprises a source of alternating current, an inductive regulator ballast having its input connected to the alternating current source, and a gaseous discharge lamp connected to the output of the ballast, a sine wave oscillator circuit having its input connected to the current supply and having its output connected to a transformer connected in series between the ballast and the lamp for stepping up and applying voltage to a lamp, the oscillator circuit comprising a transistor switch and an oscillator transformer connected to the step-up transformer for producing a high voltage, high frequency sine wave for starting and re-starting the discharge lamp. The operation of the oscillator circuit is improved by a turn-off circuit comprising series-connected diode and inductor connected to the transistor and the oscillator transformer.
REFERENCES:
patent: 4107579 (1978-08-01), Bodine, Jr. et al.
patent: 4202031 (1980-05-01), Hesler et al.
General Electric Company
Kempton Lawrence R.
La Roche Eugene R.
Legree Ernest W.
Schlamp Philip L.
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