Multiple level dimming circuit for fluorescent lamp

Details Multiple level dimming circuit for fluorescent lamp Multiple level dimming circuit for fluorescent lamp

1979-12-18

1981-08-18

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Electric switch in the condenser circuit

315 53, 315244, 315245, 315291, 315DIG4, H05B 4140

Patent

active

042849250

ABSTRACT:
A dimming circuit for operating a fluorescent lamp in an incandescent-to-fluorescent adapter at two selectable current levels. The circuit includes a choke which is series connected between the center contact of a three-contact incandescent base and one of the lamp filament coils, and a capacitor connected between the ring contact and center contact of the base. A bleeder resistor of the PTC type is connected across the capacitor. For use with an incandescent lamp fixture having a four-position, three-way switch, the circuit further includes a current limiting discharge resistor connected in series with the capacitor.

REFERENCES:
patent: 3323013 (1967-05-01), Lord
patent: 4082981 (1978-04-01), Morton et al.
patent: 4178535 (1979-12-01), Miller

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