Optics: motion pictures – With sound accompaniment – Picture and sound synchronizing
Patent
1975-11-10
1977-05-03
Hayes, Monroe H.
Optics: motion pictures
With sound accompaniment
Picture and sound synchronizing
226 44, 226 45, G03B 3100
Patent
active
040211045
ABSTRACT:
A sound-cinecamera comprising a motor for driving a capstan at uniform velocity, a motor for feeding a film intermittently, a detecting switch for detecting any superfluity or insufficiency of the film feed by said film-feeding motor relative to the film feed by said capstan driving motor and generating corresponding sag-signals, a speed-controlling circuit connected to said film-feeding motor and comprising a tachometer generator for maintaining the stability of the speed of said motor, and a sag-detecting circuit comprising said detecting switch, said sag-detecting circuit being connected to the power source of said film-feeding motor and the output thereof is connected to the controlling means of said speed-controlling circuit through a delay circuit, whereby said sag-signals generated by said detecting switch are transmitted to said controlling means independently of said speed-controlling circuit for regularizing fluctuations in the number of revolution of said film-feeding motor arising from fluctuations in voltage of said power source of the film-feeding motor and fluctuations in load of the film.
REFERENCES:
patent: 2982172 (1961-05-01), Berkenhoff
Chinon Industries Incorporation
Hayes Monroe H.
LandOfFree
Film-feeding speed controlling device for sound-cinecamera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Film-feeding speed controlling device for sound-cinecamera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film-feeding speed controlling device for sound-cinecamera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-342314