发明名称 Device for indicating the advancing of film in a camera being taken up or rewound
摘要 A camera in which a roll of film is employed is provided with a device for indicating the advancing of film being taken up or rewound. A friction member is rotatably mounted on the film take-up spool shaft but does not rotate with the shaft unless film is wound around the friction member. The friction member is provided with a cam portion which is engaged by one end of an indication lever. The other end of the indication lever is provided with a striped or other pattern which is viewable through a window in the camera body. Alternatively, a portion of the friction member could be directly viewed through the window.
申请公布号 US4134657(A) 申请公布日期 1979.01.16
申请号 US19770830286 申请日期 1977.09.02
申请人 ASAHI KOGAKU KOGYO KABUSHIKI KAISHA 发明人 NOMURA, KATSUHIKO
分类号 G03B1/06;G03B1/40;G03B1/60;G03B17/18;(IPC1-7):G03B1/00 主分类号 G03B1/06
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