Document Type and Number:
Japanese Patent JPS5214624
Kind Code:
B2
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.
More Like This:
Application Number:
JP8605873A
Publication Date:
April 22, 1977
Filing Date:
July 30, 1973
Export Citation:
International Classes:
G03B21/48; B65H23/188; B65H23/192; G03B19/18; G03B21/00; G03B31/00; G03B31/02