| 摘要 |
A device for controlling a variable shutter in a motor driven movie camera having a multibladed adjustable shutter in which relative movement between the shutter blades varies the opening angle of the shutter aperture. A driving train is provided for relatively moving the shutter blades which includes a cam connected to the shutter blades so that one revolution of the cam opens or closes the shutter aperture, a driven gear carried by the cam, clutch means, manually operable means for actuating the clutch means including a manually controlled lever movable between a first position in which a driven gear is disconnected from a driving gear and a second position in which the control lever actuates the clutch means to interconnect the driving gear with the driven gear. A detent pawl is engageable with the teeth of the driven gear for arresting variation of the shutter aperture, said detent pawl being movable in cooperation with the control lever to disengage it from the driven gear when the control lever is positioned in its second position.
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