Starting and operating apparatus for high-pressure sodium lamps

Details Starting and operating apparatus for high-pressure sodium lamps Starting and operating apparatus for high-pressure sodium lamps

1980-06-20

1982-03-30

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Surge generator or inductance in the supply circuit

315283, H05B 41231

Patent

active

043226604

ABSTRACT:
A lighting apparatus which provides for high-voltage pulses for starting a high-pressure sodium discharge lamp and thereafter provides operating ballasting. The apparatus uses a single capacitor in series with a blocking diode and a charging resistor. When the voltage on the capacitor reaches a predetermined voltage exceeding the Zener voltage of a parallel Zener diode, the capacitor discharges through a ballast which is connected in autotransformer relationship therewith to provide the high-voltage pulse to start the lamp.

REFERENCES:
patent: 3917976 (1975-11-01), Nuckolls
patent: 3963958 (1976-06-01), Nuckolls
patent: 4072878 (1978-02-01), Engel et al.
patent: 4143304 (1979-03-01), Hitchcock et al.

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