Optics: motion pictures – With sound accompaniment – Methods
Patent
1974-08-26
1976-12-28
Adams, Jr., Russell E.
Optics: motion pictures
With sound accompaniment
Methods
352 17, 352 25, 352 31, G03B 3100
Patent
active
039998428
ABSTRACT:
A method and apparatus for the resynchronization of the transport of movie film (image carrier) with the movement of another information-carrying medium such as sound tape film. Speed control and synchronization signals are produced by means of sensing the sound tape movement which provides control synchronization signal, monitoring the image frames for each sequence on the movie film by means of a counter, and comparing in a coincidence circuit the image frame count signal with the signal from the sound tape. Desynchronization of the movie film and tape is indicated by the absence of a predetermined relationship between the number of image frames in a given sequence and the signal from the sound tape, whereupon the coincidence circuit energizes an appropriate control means via a switching mechanism, such as a gate circuit, which produces a resynchronization of the film and the sound tape.
REFERENCES:
patent: 3620609 (1971-11-01), John, Jr.
patent: 3666356 (1972-05-01), Williams
patent: 3674346 (1972-07-01), Lancor, Jr.
patent: 3751143 (1973-08-01), Rosenfield
patent: 3804497 (1974-04-01), Ogiso et al.
Kreienbuhl Claude
Niederhauser Marc
Adams, Jr. Russell E.
Bolex International SA
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