Cinematographic annual : 1930 (1930)

Record Details:

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POX MOVIETONE SYSTEM 369 in Fig. 9. Daily test exposure strips are sent to the laboratory in order to determine the uniformity of development, and as a check on the standards of illumination. In printing, the double exposure method is employed, and a '**>**. '.'4 ■*!**■' . '.*. ' * ^^gKg jMHtI -%Lv £f%,;W& ^fl l^k.1 \ w ^^^^^^ n /#§ WkxXs fcWg- Itth '";,,,,,: iiTmiiiTfiTm,; v. ipP^ ^ FIGURE 13 printer point is chosen which will give the desired changeover from the negative to the positive linear characteristic. This is shown on Fig. 10. It is necessary that printers be regularly inspected in order that poor contact and aperture troubles be discovered. Before released from the laboratory, transmission measurements are made on all prints, and this is accomplished by means of photo-cell densitometers. The Fox Film Company has found it advantageous to employ equipment that is portable in nature, and has designed a type that answers these requirements. Photographs are shown in Fig. 11 of the interior of a portable recording system, and it will be observed that, due to the necessary compression on account of space requirements, many of the control panels on the stages are combined on a single relay rack. The circuits, however, are the same. Portable monitoring amplifiers are provided and loud