Operating circuit for discharge lamps with voltage starting circ

Details Operating circuit for discharge lamps with voltage starting circ Operating circuit for discharge lamps with voltage starting circ

1975-03-17

1976-08-24

Grimm, Siegfried H.

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

Diverse-type load device or electrode substituted

315207, 315208, 315242, 315272, 315283, 315DIG5, H05B 3704, H05B 4114

Patent

active

039769100

ABSTRACT:
Operating circuit for gaseous discharge lamps, such as those of metal vapor type, having a ballast device of conventional type is provided with high voltage generating means for applying high voltage starting pulses on the lamp. The circuit may be combined with an auxiliary incandescent lamp for turning the latter on for safety lighting purposes when the gaseous discharge lamp goes out. The circuit includes an induction coil in series with the gaseous discharge lamp, a controlled switch connected to a tap on the induction coil, and a charging capacitor in series with the controlled switch. When used, the incandescent lamp is connected in series with the controlled switch in parallel with the charging capacitor.

REFERENCES:
patent: 3466500 (1969-09-01), Peek
patent: 3496412 (1970-02-01), Taylor et al.
patent: 3517254 (1970-06-01), McNamara, Jr.
patent: 3611432 (1971-10-01), Babcock et al.
patent: 3699385 (1972-10-01), Paget
patent: 3889152 (1975-06-01), Bodine, Jr. et al.

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