Journal of the Society of Motion Picture Engineers (1930-1949)

Nov., 1931] PATENT ABSTRACTS 871 the danger of getting films of several customers mixed is eliminated. The device comprises a casing upon which the film enclosed in an envelope may be supported and exposed to light rays which pass through a window and through the numbering portion of the flap of the envelope for photographing the number upon a portion of the film which is pressed against the flap. The casing contains both a white and ruby lamp which may be alternately used. The ruby lamp will give enough illumination to permit the envelope and film to be properly positioned over the window in the casing preparatory to a printing operation using the white lamp. 1,817,781. Photoelectric Cell and Sound Reproducing Drum. OSCAR STEINER. Assigned to General Electric Co. August 4, 1931. The sound film is guided over a rotatable drum located between the film supply and storage reels. The rotatable drum has a circumferential opening therein which is bridged by the film. The parts on the opposite side on the circumferential opening are secured together in fixed relation on opposite sides of the opening. A photoelectric cell which receives the light passing through the opening is located between the separate parts of the drum so that light of an external source may be passed through a slit adjacent the drum and through the circumferential opening in the drum for passage through the film. 1,817,963. System of Color Photography. J. G. CAPSTAFF. Assigned to Eastman Kodak Co. August 11, 1931. A film for taking natural color pictures which consists of a single light transmitting support with a panchromatic emulsion on one surface of the support. The other surface carries minute lenticular elements particularly adapting the film for a color process of a type requiring light rays to pass through the support before reaching the emulsion, there being in the film sheet a layer including a dye absorptive of light of all colors and positioned between the emulsion layer and the opposite surface of the film sheet and transmitting at least seventy per cent of light passing once directly through said layer and unaffected by ordinary photographic baths. 1,817,977. Iris or Fade-In Effect in Motion Picture Film. P. FAVOUR. Assigned to Eastman Kodak Co. August 11, 1931. A separate film strip is applied to a motion picture film for obtaining a fading effect at desired points along motion picture film. The applied strip extends over a predetermined length of the film and is provided with apertures adjacent each of the frames of the motion picture film, which apertures vary in size for producing an "iris" effect by which a gradual transition such as a "fade-in" effect is obtained in the projection of the motion picture. The applied strip has a greater light retarding effect adjacent one end than at the other end and the ability to transmit light varies from area to area in accordance with the size of the apertures in the applied strip. 1,818,354. Composite Photographic Method and Apparatus. R. J. POMEROY. Assigned one-half to Paramount Publix Corp. August 11, 1931. Two independent cameras are focused upon the subject which is illuminated before a nonactinic ground. The two films are simultaneously exposed by light splitting. One film has an additional amount of light thrown thereon so that it is relatively overexposed. When this overexposed film is developed, a substantially opaque mask image of the subject is formed. The other film is masked with the mask image and by exposure to the desired background; the subject image of the second film is combined with an image of the background. The cameras may be