H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/68
H05B 39/06 (2006.01) B60Q 1/00 (2006.01) G02B 21/06 (2006.01) H02H 9/02 (2006.01) H05B 37/03 (2006.01) H05B 39/02 (2006.01)
Patent
CA 1296758
60-306125 Abstract of the Disclosure Surge currents which may arise in dc-illuminated incan- descent lamp can be effectively limited by an apparatus com- prising a low resistance (first resistance); another resistance (second resistance); a diode rectifier, the input terminal being connected in series to an ac source through the first resistance, and the output terminal being connected in series to an incan- descent lamp through the second resistance; a voltage regulator diode connected in parallel with said diode rectifier; a capaci- tance (first capacitance) connected in parallel to the input terminal of said diode rectifier; another capacitance (second capacitance) connected in parallel to the output terminal of said diode rectifier; a switching device connected to the second resistance; and a timing circuit connected to said switching device in a manner that the switching device shorts the second resistance after a lapse of a prescribed time upon switching-on of the ac source.
502298
Hayashibara Ken
Macrae & Co.
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