| 摘要 |
1524373 Switch indicators LUCAS ELECTRICAL CO Ltd 22 Jan 1976 [11 Feb 1975] 5711/75 Heading H1N In an indicating system for an electric switch a light transmission region 15, Fig. 1, of an operating member 13 is illuminated from a light source 17 through a lens 19, whereby movement of the lens 19 or light source 17 on movement of the operating member alters the area illuminated to give an indication of the operating position. The light source 17 may be an optical cable and the lens 19 may be cylindrical in order to illuminate the region 15 with a narrow band which changes to illuminate the whole area on movement of the button 13. |
