发明授权
- 专利标题: Motion picture camera with improved frame count indicator
- 专利标题(中): 具有改进的帧数指示器的电影摄影机
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申请号: US607056申请日: 1975-08-22
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公开(公告)号: US3977776A公开(公告)日: 1976-08-31
- 发明人: Eduard Wagensonner , Alfred Winkler , Friedrich Winkler
- 申请人: Eduard Wagensonner , Alfred Winkler , Friedrich Winkler
- 申请人地址: DT Leverkusen
- 专利权人: AGFA-Gevaert, A.G.
- 当前专利权人: AGFA-Gevaert, A.G.
- 当前专利权人地址: DT Leverkusen
- 优先权: DT2441542 19740830
- 主分类号: G03B19/18
- IPC分类号: G03B19/18 ; G03B1/60 ; G03B1/66 ; G03B17/36
摘要:
Pulses are furnished which each indicate transport of a frame. The pulses are counted on a BCD counter. Selected outputs of the counter are connected to the inputs of coupling stages, each including a JK flip-flop. Each flip-flop changes state for a predetermined count on the counter. When each flip-flop changes state, a corresponding indicator lights up, thereby furnishing an indication to the photographer of how many frames have been transported.
公开/授权文献
- USD334249S Dental floss spindle 公开/授权日:1993-03-23
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