发明名称 |
Film transportation device for camera |
摘要 |
A film transportation apparatus having an electric motor as the drive source for transporting the film in which for each frame of the film to be advanced, there are provided a speed control period of, while giving a driving power to the motor, controlling its speed, and a braking period that follows. The factor of causing the speed of movement of the film by the motor to vary is examined in respect to the voltage of the electrical power source, the number of exposed frames of the film and others for the purpose of controlling the effective voltage given to the motor in the speed control period.
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申请公布号 |
US4734732(A) |
申请公布日期 |
1988.03.29 |
申请号 |
US19870041078 |
申请日期 |
1987.04.21 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
NISHIO, TETSUYA;OHARA, TSUNEMASA;KOBAYASHI, RYUICHI |
分类号 |
G03B17/42;(IPC1-7):G03B1/12 |
主分类号 |
G03B17/42 |
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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