Three-way fluorescent lamp device

Details Three-way fluorescent lamp device Three-way fluorescent lamp device

H - Electricity

05

B

315/31

H05B 41/40 (2006.01) H05B 41/18 (2006.01)

Patent

CA 1307023

PHA 21216 26 14-3-1985. ABSTRACT. Three-way fluorescent lamp device. A ballast circuit for starting and operating a preheat type cir- cular fluorescent lamp, which replaces a multiple wattage incandescent lamp in a three-way incandescent lamp socket, so that the fluorescent lamp can be ignited to function at three different operating wattages. A lamination stacked core structure mounts first and second coils. A passive circuit element, such as a positive temperature coefficient resistor also known as a thermistor, is connected in the circuit, which includes a three-way incandescent lamp screw base, for current switching functions to achieve the desired ignition and operating currents for the fluorescent lamp at its different operating wattages.

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