H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/38, 355/51
H05B 41/14 (2006.01) H05B 41/40 (2006.01)
Patent
CA 1046165
ABSTRACT Apparatus for supplying power to start and operate a thermionic device such as a fflourescent lamp includes a multiposition switch coupled to the running capacitor means in the power circuit. The switch can be selectively operated to a number of positions for varying the value of capacitance in circuit with the transformer and the thermionic device. A variation in the capacitor reactance varies the impendance of the series circuit thus varying the current in the device thus causing a change in the output level produced by the thermionic device. In respect of the fluorescent lamps, the change is manifested in change in light level produced by the lamps.
230961
Abrahams Fred W.
Crawford Joseph A.
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