Electromagnetic shutter release device

摘要

An electrical shutter release system includes a shutter release mechanism releasably locking the shutter in cocked position and spring biased to a retracted position, a lock mechanism releasably locking the release mechanism in its advanced shutter locking position and including an armature movable therewith, a charge spring biasing the lock mechanism in its advance lock position. A permanent magnet flux core retains the armature in advanced position and carries a solenoid which is momentarily energized to counteract the permanent flux and release the armature to effect the spring retraction of the lock and release mechanisms. The retraction of the release mechanism effects the return of the armature to permanent magnetic flux engagement with the core and the cocking of the shutter effects the cocking of the release mechanism and the loading of the lock mechanism spring. A manually actuated mechanism is provided for releasing the armature from the core in the event of malfunctioning of the solenoid energizing network.