CARBON BRUSH HOLDER UTILIZING A WORN BRUSH DETECTOR

摘要

55,289 A worn brush detector 43 for an electric generator. The worn brush detector 43 comprise a contactor strip 55 of electrically-conductive material secured to and insulated from a brush holder 28, the contactor strip 55 having a plurality of fingers 52 projecting downward from the strip 55 and generally perpendicular thereto, the fingers 52 being disposed adjacent to a hole 62 in the brush holder 28 and electrically insulated therefrom. An electrically insulated knob 61 on the opposite end of the fingers 52 projects through the hole 62 such that when a brush 25 is inserted into the holder 28 the corresponding finger 52 is pushed away from the holder by the knob 61 contacting the brush 25. When one of the brushes 25 has worn down a predetermined amount the brush 25 is disengaged from the knob 61 so that the corresponding finger 52 is caused to contact the holder 28 to generate an electrical signal. Light emitting diodes 76, electrically connected to each of the holders 28, is illuminated to indicate when a brush holder 28 having a worn brush 25 has been detected.