再颁专利
USRE31585E Long time exposure preventing device for camera with electronic flash
失效
电子闪光灯相机长时间曝光防护装置
- 专利标题: Long time exposure preventing device for camera with electronic flash
- 专利标题(中): 电子闪光灯相机长时间曝光防护装置
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申请号: US391042申请日: 1982-06-22
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公开(公告)号: USRE31585E公开(公告)日: 1984-05-15
- 发明人: Masahiro Kawasaki , Yoshio Sawada
- 申请人: Masahiro Kawasaki , Yoshio Sawada
- 申请人地址: JPX Tokyo
- 专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX52-127931 19770920
- 主分类号: G03B7/083
- IPC分类号: G03B7/083 ; G03B7/16 ; G03B15/05
摘要:
A signal indicating that the correct exposure value has been achieved and a signal indicating the completion of flash are logically summed to provide a shutter closing signal. This ensures that the shutter will be closed even when the light emitted by the flash is insufficient to achieve the proper level of exposure.
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