Optics: motion pictures – With sound accompaniment – Picture and sound synchronizing
Patent
1978-05-26
1980-04-08
Adams, Russell E.
Optics: motion pictures
With sound accompaniment
Picture and sound synchronizing
352 27, 352 29, G03B 3100
Patent
active
041969839
ABSTRACT:
A sound motion picture camera capable of using a sound film is disclosed. The camera includes a film receiving chamber having an image recording location and a sound recording location, a first film feeding device for intermittently transporting a film loaded in the chamber from the image recording location toward the sound recording location, a second film feeding device for transporting the film transported by the first film feeding means further downstream from the sound recording location at a substantially constant speed, a switching device interposed between the first and second film feeding devices and a control device for controlling the operation of the film feeding devices. The switching device is so designed that ON-OFF of the switch is controlled by the movement of the film and that the switch produces pulse signals at an almost constant interval so long as the film transporting operations of the first and second film feeding devices are going well keeping a desired proper operating relation therebetween. But, whenever the operating relation of the two film feeding devices becomes disordered, the switch device continues putting out positive or negative signals. These signals are detected by the control device which terminates the film transporting operations of both the first and second film feeding devices when the ON or OFF signals continue coming out from the switching device for a longer time period than a predetermined time duration.
REFERENCES:
patent: 3205507 (1965-09-01), Hochstein
patent: 3782813 (1974-01-01), Isono
patent: 3972604 (1976-08-01), Yoshimura et al.
patent: 3982826 (1976-09-01), Saito
patent: 3989361 (1976-11-01), Gross
patent: 4003643 (1977-01-01), Freudenschuss et al.
patent: 4021104 (1977-05-01), Ito
Okajima Hidekazu
Takimoto Hiroyuki
Adams Russell E.
Canon Kabushiki Kaisha
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