STARTERLESS CIRCUIT ARRANGEMENT FOR THE IGNITION AND OPERATION OF ONE OR A NUMBER OF LOW VOLTAGE FLUORESCENT LAMPS CONNECTED IN SERIES

摘要

INVENTION: STARTERLESS CIRCUIT ARRANGEMENT FOR THEIGNITION AND OPERATION OF ONE OR A NUMBEROF LOW VOLTAGE FLUORESCENT LAMPS CONNECTEDIN SERIESABSTRACT OF THE DISCLOSUREA starterless circuit arrangement for the ignition andthe operation of one or a number of series connected, low voltagefluorescent lamps which are connected with a stray field trans-former coupled with a voltage source. The stray field transformerproduces the no-load voltage needed for firing the lamps andpossesses heating coils which are connected with the electrodesof the lamps. A cold conductor having markedly positive resistancecharacteristic is connected in parallel with at least part of thesecondary winding of the stray field transformer in order tomaintain the voltage applied to the lamp(s) at a value beneaththe firing or ignition voltage for such length of time until theelectrodes of the lamps are pre-heated.