International projectionist (Oct 1931-Sept 1933)

Z/A^ PATENT PAGE THE following digest of patents granted recently was prepared exclusively for International Projectionist by Henry L. Burkitt. Mr. Burkitt, B.S. in ch. e., L.L.B., is a former Assistant Examiner in the U. S. Patent Office, a member of the Bars of New York, Pennsylvania, and the District of Columbia, practicing in New York City. Any reader desiring information on any patent, whether abstracted herein or not, should address Mr. Burkitt in care of this publication. — Editor. Granted September 8, 1931: Film Projector 1,821,930. Cinematographic Projector, to Maurice Couade. The film guide of this patent apparently is associated directly with means for advancing the film intermittently. A member, which reciprocates both in the same line as the film moves, and toward and away from the film, has a claw intended to be projected through the guide to engage the film and move along with it, and then to be withdrawn from the film. An eccentric pin produces the two reciprocatory movements of the claw member. Film Mechanism 1,821,946. Motion Picture Apparatus, to Freeman Owens. A motion picture projector, using sound film, has a shutter shaft with a combined drive wheel and shutter afExed adjacent to its end. A frictional device engages the drive wheel to transmit power to the shutter and to the mechanism for intermittently moving the film. A finger wheel at the end of the shaft opposite the drive wheel provides means for rotating the shaft. Novel Recorder 1,822,057. Method for Recording Photographic Sound Records, to Freeman H. Owens. The invention is concerned with the consolidation, upon a single film, of the musical or other sound effects recorded individually upon a plurality of films. The electrical impulses, created by a number of such films, are used conjointly and simultaneously to modulate the intensity of a light producing element. The varying light from this element is then used for recording on the single film. Plurality of Lenses 1,822,528. Moving Lens Cinematograph Machine to Wesley Ernest John. A number of lenses are moved past a point at which they are exposed. The lenses are arranged to move along straight and curved paths, these paths communicating so as to form a continuous path. Recording Light Source 1,822,865. Method and Apparatus for Producing Photographic Records, to T. W. Case. , . . not "clips^^ in wordy patent language but clear and concise abstracts prepared especially to meet the needs of readers of this publication. sound films. Its particu'ar structure would probably be interesting only to those working in this highly specialized field. New Perforating System 1,822,350. Arrangement of Perforations Cinematographic Films, to Julien Henri Jarnier. The film of this system has its perforations between the images, rather than along the sides, as is customary in America. The number of perforations is determined according to a formula in which the number is made directly proportional to the width of the film, and to a factor called the specific resistance to rupture by traction, and inversely proportional to the difference between the resistance to rupture of the width of a perforation and the product of that width and the specific resistance to rupture. Lens Shifting Device 1,822,551. Lens Shifting Mechanism for Projecting Machines, to Albert Tondreau; assigned to Warner Bros. Pictures, Inc. This patent relates to a means for positioning one of a number of lenses with relation to a motion head. The arrangement of the lens shells permits longitudinal adjustment of the shells with relation to each other. A pivotal connection permits any one of the shells to be positioned with its axis in alignment with the projected light. The lens shifter handle is provided with suitable stops for defining its movement. Film Control 1,822,727. Film Phonograph, to Guillermo A. del Valle; assigned to General Electric Company. In connection with a sound record made on a film, means are provided at the end of the sound track to be engaged by a member normally out of engagement, but moving into engagement with the film when the roll of film has decreased to a predetermined diameter. This means could be used for stopping the motor or for any other purpose. Granted September 15: Film Winding Device 1,823,245. Motion Picture Film Winding Device, to Otto Wittel; assigned to Eastman Kohak Company. The patent is for a light source used in makng This winding device includes a flange ani a [33] Edited by H.L.BurKitt pair of hubs, one of which is slidably carried by the flange. The hub members are separable by sliding the flange on one of them. Tinting Sound Film 1,823,246. Method of Tinting Films for Use in Sound Reproduction, to Albert A. Young; assigned to Eastman Kodak Company. The sound track portion of the film is preserved untinted while the remainder is retained against shrinkage. A dye, dissolved in a medium consisiting of two solvents, one both for the film and for the dye, and the other not dissolving the film. The latter acts to reduce the evaporation rate of the entire solvent, and thereby reduces the tendency of the film to buckle. Modifying Sound Negative 1,823,349. Sound Picture System, to Shelby C. Chapman; assigned to Electrical Research Products, Inc. The patent is for a method of modifying the negative of a sound film and involves chemical reduction of the sound record, progressively varying lengthwise of the film. Framing Device 1,823,355. Telescope Framing Device, to Louis Simon Frappier and Ewald Boecking; assigned to International Projector Corporation. A microscopic adjustment is provided for light directed upon sound film. The microscope used for this adjustment is supported in a housing at an aperture, adjacent which is located a prism supporting means for changing the angle of the scanning light. The housing may be mounted upon the film gate support in interchangeable relation with the film gate itself. Novel Speaker Diaphragm 1,823,512. Loud Speaker, to Abraham Ringel; assigned to Radio Corporation of America. A loud speaker includes a diaphragm so small that it would not normally reproduce low fre ■ "• notes A method is involved in which a diaphragm of this character is used and the movement of the driving member for the diaphragm 1- steppeJ up sufficiently to reproduce the desired low notes. Disc Reproducer 1,823,737. Motion Picture-Sound Apparatus, to Charles L. Heisler; assigned to General Electric Company. This projector includes a phonograph turntable, mounted on the same base with the projector and having separate adjustment on a common axis. A motor is provided and has a drive connection with the turntable. Granted September 22: Film Matching Means 1,824,294. Sound and Picture Film Matching Means, to Freeman H. Owens; assigned to Owens Development Corporation. Sound film, to be used for reproduction synchronously with a separate picture film, has on a