Low-voltage starting means for arc lamp

Details Low-voltage starting means for arc lamp Low-voltage starting means for arc lamp

H - Electricity

05

B

315/47

H05B 41/14 (2006.01) H01J 61/98 (2006.01) H05B 31/30 (2006.01)

Patent

CA 1037552

PATENT APPLICATION of EDWIN T. CHAN for LOW-VOLTAGE STARTING MEANS FOR ARC LAMP ABSTRACT OF THE DISCLOSURE A low voltage power supply can be used to start a gas-filled arc lamp having a movable electrode. To initiate the arc, a solenoid is energized by the low-voltage power supply to drive the movable electrode into contact with another electrode. An inductor is provided in series with the movable electrode. When the solenoid is deenergized, the movable electrode withdraws from contact with the other electrode, and a voltage which is larger than that of the power supply develops across the two electrodes. This difference of potential is attributable to the energy stored in the inductor, and is sufficient to ionize the gas in the gap between the two electrodes. In one embodiment the movable electrode is retractable into an anode electrode structure from which it is electrically insulated. The arc generated in the gap follows the movable electrode until the movable electrode is withdrawn into the anode structure, whereupon the arc jumps to the anode. - 1 -

193202

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