| 摘要 |
A brush wear detector assembly for the brushes contacting the rotating commutator or slip rings of a dynamoelectric machine includes a light interruptor member located in a housing attached to the brush holder with the light interruptor being biased by a compression spring which operates to push the light interruptor against the side of the brush. The light interruptor includes an aperture, or other discontinuity, which is located adjacent the separation of a fiber optic conductor. During a usable condition of the brush, a light path is completed through the aperture between the exposed ends of the fiber optic conductor; however, for a worn condition of the brush, it is forced laterally into the brush holder behind the end of the brush causing the light path to be interrupted whereupon a signal indicative of a worn condition of the brush is generated. Alternatively, the aperture or conductor positioning could be such that at worn brush condition a light path is established.
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