Film transportation device for camera

Details Film transportation device for camera Film transportation device for camera

1987-04-21

1988-03-29

Gellner, Michael L.

G03B 112

Patent

active

047347325

ABSTRACT:
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.

REFERENCES:
patent: 4659201 (1987-04-01), Suzuki et al.
patent: 4685789 (1987-08-01), Kawamura et al.

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