Exposure time control device in a cinecamera

Details Exposure time control device in a cinecamera Exposure time control device in a cinecamera

1975-08-26

1977-11-08

Hayes, Monroe H.

Optics: motion pictures

With automatic diaphragm control

352121, G03B 708

Patent

active

040573338

ABSTRACT:
An exposure time control device in a cinecamera comprises a rotatable shutter, an electric motor for driving the shutter, a power source for the motor, and changing means operatively associated with the rotatable shutter to change the number of revolutions of the motor within a period during which an aperture is opened and closed by the rotatable shutter.

REFERENCES:
patent: 3705764 (1972-12-01), Reinsch
patent: 3854805 (1974-12-01), Tobioka
patent: 3898000 (1975-08-01), Kobayashi

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