Pulse circuit for gaseous discharge lamps

Details Pulse circuit for gaseous discharge lamps Pulse circuit for gaseous discharge lamps

1976-06-02

1978-01-17

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge control discharge device in the supply circuit

315194, 315205, 315244, 315283, 315290, 307252M, 328 59, H05B 4130

Patent

active

040694429

ABSTRACT:
Circuit operating from a direct current source applies DC pulses to a high pressure sodium vapor lamp to improve the color rendition of the lamp. The circuit includes a thyristor switch in series with the lamp, an RC timing circuit for periodically turning on the switch at predetermined intervals, and an LC circuit for turning the switch off. An inductor in series with a diode across the capacitor of the LC circuit provides for discharge of the capacitor to enable subsequent re-charging thereof, so as to provide the desired pulsed operation of the circuit. This mode of operation also provides for application of voltage to the lamp which is substantially higher than the supply voltage.

REFERENCES:
patent: 3344310 (1967-09-01), Nuckolls
patent: 3518486 (1970-06-01), Babcock
patent: 3555302 (1971-01-01), Nuckolls
patent: 3629683 (1971-12-01), Nuckolls
patent: 3953763 (1976-04-01), Herrick

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