Film cassette with sound recording and playback - has drive sprocket and claw mechanism and aperture for sound transducer

摘要

The film strip contains a sound track and is advanced through an exposure station and the sound recording and playback station. The sound recording station is adapted to receive a sound transducer of the projector. Intermediate of the film exposure station and the sound recording and playback station, a sprocket, adapted to be driven in unison with the claw mechanism of the projector, engages the film strip. Immediately prior to coming into operative relationship with the sound recording and pick-up head, the film strip is gripped between an idler of the cassette and a capstan, the latter element having a flywheel attached thereto and forming part of the projector so as to extend into the cassette. A spring biased idler engages the section of film strip disposed between the sprocket and the capstan.