| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable a bulb or a fluorescent lamp, even if a failure occurs, to be used continuously without changing the bulb or fluorescent lamp. <P>SOLUTION: A spare of a filament that is the high failure rate part among part groups of a bulb or fluorescent lamp is provided inside the bulb or fluorescent lamp. A rotary outlet type circuit 9 is provided for selecting a circuit for energizing the spare filament, enabling the bulb or fluorescent lamp to be continuously used with the shape as it is. For a fluorescent lamp located in a difficult reachable place, on-hand operation is achieved by separating the rotary outlet type circuit 9 connected to a fluorescent lamp through cords, four cords for each side that are gathered up into three, a total of six cords for both sides, from the main body and by integrating the both end parts. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
