发明名称 |
System for controlling film transport for camera |
摘要 |
A film transport control system in a camera, including a central processing unit programmed to control a film transport motor to transport film for one frame and also to start operating a liquid crystal display unit in response to a signal intermittently generated by a one-frame feed switch actuated in timed relation to movement of the film in the camera. The central processing unit issues a film rewinding failure warning if a predetermined number of signals are not supplied by the one-frame feed switch within a preset period of time from the time when the film starts being rewound. The time when signals are no longer applied by the one-frame feed switch for a predetermined period of time is regarded as a film rewinding completion time by the central processing unit if a predetermined number of signals or more are applied by the one-frame feed switch when the film starts to be rewound.
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申请公布号 |
US4728976(A) |
申请公布日期 |
1988.03.01 |
申请号 |
US19860939689 |
申请日期 |
1986.12.09 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
TAKAHASHI, AKIRA;KOSHIISHI, SHINICHIRO |
分类号 |
G03B1/12;G03B17/00;G03B17/18;G03B17/42;(IPC1-7):G03B1/12;G03B1/60 |
主分类号 |
G03B1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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