Abstract: A film camera for recording visual images is adapted to record sound accompanying a photographic event onto the film section used for the visual image of such event. This audio recording is accomplished with light, immediately or at any time prior to taking the next photograph. The audio recording is accomplished without substantial intrusion into the photographic image. This system utilizes the film, processing, and printing currently available to the consumer or amateur photographer. The film camera captures and stores sound in a digital binary form then imprints this binary code onto film in the form of black and transparent bars adjacent the actual negative light image. A reading device (110) accesses and makes audible the recorded audio from photographs. A receptacle (139) provides storage of multiple photographs and instant access to audio and visual information stored. A processor which isolates and monitors a static electrical field surrounding the photographs in the receptacle.

Abstract: A driving device which enables the use of films with or without perforations and the driving of a perforated film without using the perforations and sprockets in movie projectors and editors with optical compensator and steady flow of the film, and any other device where the film between the two reels is driven conventionally with a perforation-sprocket system.

Abstract: A system for synchronizing projection of a movie film with playback of a sound recording made simultaneously with filming of the movie by simple and economical adapter means compatible with existing camera, projector and sound equipment without substantial modification. The invention utilizes "home movie" type camera and projector equipment, with a tape recorder-playback unit as the sound system. The camera is powered from a power supply having a switch operated by the "play" button of the tape recorder, thereby starting and stopping operation of the camera and tape unit simultaneously during filming and recording. The tape drive motor is powered from a selectively controllable voltage supply, and is not connected to the supply through the normal electrical system of the tape unit, as is conventional.

Abstract: Disclosed is a film speed control device for a single-system sound camera capable of simultaneous picture/sound recording in which an intermittent film transport mechanism at the exposure station and a constant speed film transport mechanism at a sound station having a magnetic recording head are driven synchronously by separate drive motors. In the control device, the impedance of a high frequency coil is changed in response to changes in the size of a film loop between the stations to control the rate of operation of the intermittent film transport so as to maintain constant the size of the film loop. The output of the high frequency oscillator is used for AC bias for the magnetic recording head, and is rectified for use as a power source for the recording amplifier.