Optics: motion pictures – Camera and/or projector drive mechanisms – With speed regulation or selection
Patent
1978-12-15
1981-01-20
Hix, L. T.
Optics: motion pictures
Camera and/or projector drive mechanisms
With speed regulation or selection
352 14, 352191, 242 7551, 242186, 242183, G03B 122, G11B 1534
Patent
active
042458978
ABSTRACT:
A moving picture camera with interchangeable film magazine comprises in each magazine, a take-up roll on which is wound the exposed film, and an electric motor rotating this roll.
A measuring device is provided for measuring the speed of rotation of the take-up roll and for delivering a first signal representing this speed of rotation. A computer circuit receiving at its inputs said signal and a signal representing the image cadence selected and another signal representing the desired tension for the film, delivers at its ouptut a signal representing the value of the intensity of the electric current supplied to the motor, so that the required mechanical power, in other words the useful electric power supplied by this motor, is constant, for a selected image cadence and a desired film tension.
REFERENCES:
patent: 2906584 (1959-09-01), Hammer et al.
patent: 3564219 (1971-02-01), Mutziger
patent: 3819258 (1974-06-01), Butler et al.
patent: 3910521 (1975-10-01), O'Callaghan et al.
patent: 4000496 (1976-12-01), Beaulieu
patent: 4114995 (1978-09-01), Stieringer et al.
Beauviala Jean-Pierre
Charras Jean-Pierre
Hix L. T,.
Perkey William B.
Societe AATON
LandOfFree
Moving picture camera with interchangeable film magazine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Moving picture camera with interchangeable film magazine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moving picture camera with interchangeable film magazine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1763984