| 摘要 |
PURPOSE:To make the compensation operable for defective lighting as a gas discharge lamp, by connecting a series circuit, consisting of an auxiliary light source filament, a switch closing when not lighted a luminous tube and a switch closing when exceeding a lightable temperature, in parallel to the luminous tube. CONSTITUTION:Across power source terminals a, b, are connected in series an energizing coil 8 and main electrodes 3, 4 of a luminous tube 2, as well as connected a series circuit, consisting of a relay switch S17, an auxiliary light source filament 9 and a bimetal switch S210, in parallel to the luminous tube 2 for the power source. In this way, simultaneously with the luminous tube 2 going out, the switch is closed to construct a closed circuit, including the auxiliary light source filament 9 and the switch, for the power source, with the auxiliary filament 9 lighted, thus a defective lighting can be compensated during a time till the luminous tube becomes restartable. |
