Movie camera having adjustable shutter

Details Movie camera having adjustable shutter Movie camera having adjustable shutter

G - Physics

03

B

G03B 9/24 (2006.01) G03B 9/12 (2006.01) H04N 5/225 (2006.01)

Patent

CA 2205726

A shutter system for a movie camera or the like for controlling the film exposure including a main shutter wheel rotatably mounted on main drive shaft driven by a first motor and at least one adjustable shutter wheel positioned adjacent to and coaxially rotating with the main shutter wheel, the adjustable shutter wheel being mounted on a secondary shaft independently driven by a second motor. Both the aperture (determined by the relative positions of the shutter wheels of the main shutter wheel and adjustable shutter wheel) and the shutter speed are set by a controller which regulates the speed of each of the motors.

L?invention concerne un obturateur pour caméra cinématographique ou appareil analogue permettant de commander la durée d'exposition du film, comportant une roue principale montée de manière à tourner autour d'un arbre principal entraîné par un premier moteur et au moins une roue réglable adjacente à la roue principale et tournant dans le même axe que celle-ci, cette roue réglable étant montée sur un arbre secondaire entraîné par une deuxième moteur indépendant. Les deux ouvertures (déterminées par les positions relatives de la roue principale et de la roue réglable) et la vitesse de l'obturateur sont fixées par un régulateur qui règle la vitesse de chacun des moteurs.

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