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

124 PATENT ABSTRACTS [J. S. M. P. E. When the reproducing stylus engages the sound record, the input circuit of the amplifier is connected with the stylus. When the recording stylus is placed in engagement with the sound record, the magnetic windings thereof are connected with the output circuit of the amplifier for cutting a groove in the record in accordance with the sound vibrations impressed upon the input circuit of the amplifier. 1,823,243. Method and Apparatus for Lapping Color Film Embossing Rollers. O. WHITTEL. Assigned to Eastman Kodak Co. Sept. 15, 1931. A method of lapping lenticular film embossing rollers which comprises providing a cylinder with a plurality of fine guide lines, turning the cylinder, and lapping the cylinder with a plurality of wires, a fine lapping compound being used on the cylinder. The embossing roller is used for operation upon color motion picture films. The lenticular areas or elements formed in the film are extremely minute as the distance across these elements may be from 0.0015 to 0.002 of an inch. 1.823.245. Film Winding Device. O. WITTEL. Assigned to Eastman Kodak Co. Sept. 15, 1931. Winding device for motion picture film in which a reel is provided with a pair of concentric hub members. One hub member is slidably carried by a flange disposed in one side thereof. The two hub members are separated by sliding the flange on one hub. The structure of the film winding device is such that the film may be drawn from an inner convolution of a supply reel and wound on an outer convolution of a take-up reel. The construction of the reel is such that the film is properly aligned on the reel without rewinding. 1.823.246. Method of Tinting Film for Use in Sound Reproduction. A. A. YOUNG. Sept. 15, 1931. A method of tinting the picture areas of a photograph film in which the sound record portion is preserved untinted while preventing shrinkage of the film by applying to the picture areas of the film a dye dissolved in a solution comprising a solvent for the film and the dye and a non-solvent for the film which has the property of reducing the rate of evaporation of the solvent whereby the tendency of the film to buckle is eliminated. The dye, which is applied to the picture areas of the film, is dissolved in a solution containing from 5 to 10 per cent of acetone, from 70 to 75 per cent methyl alcohol, and the remainder triacetin. 1,823,349. Producing Fade-in and Fade-out of Photographic Sound Record. S. C. CHAPMAN. Assigned to Electrical Research Products, Inc. Sept. 15, 1931. The sound record is chemically treated for reducing the end portions of the sound record progressively varying lengthwise of the film. The reproduced sound will thus gradually increase in volume from silence to the normal volume of the record, vary normally with the record till near the end when the volume of the sound will gradually diminish to silence. 1,823,355. Telescope Framing Device. L. S. FRAPPIER AND E. BOECKING. Assigned to International Projector Corp. Sept. 15, 1931. Projecting machine for photographic sound records wherein a microscope is supported in the path of a scanning ray in such position that the ray can be observed while adjustments are being made to secure the proper characteristics thereof. A prism is positioned in the path of the light rays to deflect a portion of the light at right angles into the microscope in order that the sound record may be analyzed. 1,823,400. Photographic Film Copying Machine. L. HORST. Assigned to Sinus Kleuren-Film Maatschappil, of Bosch en Duin, Netherlands. Sept. 15,