作者: John J. Henwood , Kurt A. Grunert , Birch L. DeVault
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摘要: A circuit interrupter with an optical indicator characterized by a housing, stationary contact structure within the movable carrier housing and between open closed positions relative to carrier, said also being remote proximate of lens, means for observing position including lens in directed structure, indicia on surface facing having two portions, showing different portions when is positions, thereby indicating observer whether or condition.