H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/63
H05B 41/14 (2006.01) H05B 41/232 (2006.01)
Patent
CA 1071698
PHN 7800 ABSTRACT The invention relates to a capacitively stabilised discharge lamp, that lamp being shunted by inter alia a coil. During the starting procedure of the lamp that coil is brought to saturation, whereby means of resonance with the capacitive to start it. According to the invention the B-H magnetisation curve of the coil has been chosen so that a transition from the unsaturated condition to the saturated condition also occurs dur- ing the operating condition of the device, namely just before the moment the lamp is extinguished during each half cycle of the supplying a.c. voltage. Consequently the ratio of the r.m.s voltage of that a.c. voltage source to the operating voltage of the lamp may be relatively small. A resistor having a positive temperature coefficient which shunts the lamp and is in series with the coil, limits the electric current if the lamp refuses to start. - 19 -
241274
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