Cinematographic annual : 1930 (1930)

Record Details:

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RCA PHOT* irilONK SYSTKM 355 film has been stretched, a loop tends to form between the sprocket "S" and the recording drum "D". This allows the roller to move downward causing the compensator to move the idler into a position to increase the speed of the recording drum and take up the FIGURE 5 Schematic diagram of compensating mechanism showing transmission of power from the motor to pull-down sprocket and recording drum. slack film. When the film shrinks, the reverse action takes place. The position of the compensator roller is shown by an indicator on the recorder door when it is in the operating position. Wipers are provided to keep the friction drive surfaces of the idler and cone clean. These must be kept in perfect condition since proper operation of the recorder depends largely on these parts. In order that the sound track may be printed in perfect synchronism with the picture which is exposed at the same time, a marker light is provided on the recording machine and on each