| 摘要 |
This invention pertains to a camera mechanism in which the aperture and shutter are automatically set by means of a light sensor whose output is connected to an electrical circuit disposed to actuate a solenoid or holding relay which is operatively engaged to a pivotal arm having a mask portion with contoured apertures movable in front of both the aperture and light sensor. This arm is frictionally retained upon a pivot pin and is moved from an "at-rest" condition to a determined exposure condition by means of the solenoid as it is moved by the shutter release lever. The mask arm in its normal or "at-rest" condition is disposed in the maximum open condition to provide a maximum exposure to the film when the shutter is actuated. During the movement of the release lever the mask arm is moved by means of the holding action of the actuated moving solenoid until a correct setting of aperture and shutter has been achieved as ascertained by the light sensor output. When this setting is reached the current to the solenoid is cut off, releasing the holding action of the solenoid to the mask arm. This arm, after it is released, and because of the friction at the pivot pin, is caused to stop at this correct setting.
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