Film transport speed controlling device

Details Film transport speed controlling device Film transport speed controlling device

1974-07-15

1976-03-09

Hix, L. T.

Optics: motion pictures

With sound accompaniment

Picture and sound synchronizing

226 44, 352 21, 352 29, 352 30, 352180, G03B 2148

Patent

active

039428826

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.

REFERENCES:
patent: 3154011 (1964-10-01), Gottscho et al.
patent: 3244469 (1966-04-01), Hennessey et al.

Affiliated with

Also associated with

Rating

Film transport speed controlling device 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 transport speed controlling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film transport speed controlling device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-830413