| 摘要 |
1,049,003. Supply systems for fluorescent lamps. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. May 27, 1965 [May 30, 1964], No. 22577/65. Heading H2H. The circuit arrangement described in Specification 553,301 is modified by the addition of a capacitor 18 shunting the circuit of the lamp 1 and capacitors 19, 20 shunting the filamentary electrodes 2, 3 respectively of the lamp 1. Overload of the D.C./A.C. converter 17 and the destruction of the semi-conductor elements therein is prevented should one of the lamp filaments break. The capacitance of each of the capacitors 19, 20 is greater than that of capacitor 14 and the impedance thereof greater than that of the electrodes 2, 3.
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