The motion picture projectionist (Nov 1931-Jan 1933)

November, 1931 Motion Picture Projectionist 31 ♦ RECENT PATENTS ♦ This page is conducted by Mr. Ray B. Whitman, Patent Attorney, 230 Park Avenue, New York City. Copies of any of the patents cited may be obtained by addressing the "Patent Editor," this magazine, and enclosing fifteen cents to cover costs. 1,821,630. REGULATOR FOR SOUND REPRODUCING AND SYNCHRONIZING MACHINES. Charles H. Garrett and Bruno G. Herber, Dallas, Tex. Filed Mar. 25, 1929. Serial No. 349,539. 4 Claims. (CI. 88—16.2.) 1. A regulating device for sound reproducing machines including a turntable having an internal gear ring, a vertically disposed shaft, a driving gear mounted upon and rotated by said shaft, an intermediate gear for transmitting motion from said driving gear to said turntable, a bushing carried by said vertical shaft, a ring having an integral arm tensionally mounted on said bushing and affording a bearing for said intermediate gear and means associated with said arm to relieve the tension of said ring whereby to rotate the latter to move said intermediate gear circumferencially relative to its points of engagement with said driving gear and gear ring. 1,820,054. LIGHT GUARD FOR MOTION PICTURE PROJECTION MACHINES. Augusto Dina, Jersey City. N. J., assignor to International Projector Corporation, New York, N. Y., a Corporation of Delaware. Filed Mar. 30, 1929. Serial No. 351,206. 12 Claims. (CI. 88—17.) -Utf i.7» 1. In a projection machine having a projection light beam, a projection head having an aperture opening upon which said beam is directed, a perforated shield around a portion of the beam adjacent said head, and an end wall to said shield, said wall extending across said beam and having an opening therein of predetermined cross-sectional area to define the area of the light beam falling npon the aperture opening. 1.823,355. TELESCOPE FRAMING DEVICE. Louis Simon Frappier and Ewald Boecking, Brooklyn, N. Y., assignors to International Projector Corporation. New York, N. Y., a Corporation of Delaware. Filed June 29, 1929. Serial No. 374,761. 9 Claims. (CI. 179—100.3) 1. In a machine for reproducing sound from a photographic sound record, means for producing a scanning light, a film gate for directing said sound record past said light, a support therefor, and a microscope for facilitating adjustment of said light, means for supporting said microscope comprising a housing having an aperture therein, a prism supporting means mounted adjacent said aperture for changing the angle of the scanning light, and means for mounting said housing upon said film gate support interchangeably with said film gate. 1,822,551. LENS SHIFTING MECHANISM FOR PROJECTING MACHINES. Albert Tondreau, Los Angeles, Calif., assignor to Warner Bros. Pictures, Inc., Los Angeles, Calif., a Corporation. Filed Apr. 13, 1929. Serial No. 354,810. 9 Claims. (CI. 88—24.) 1 v Per" 9. A picture projection apparatus comprising a motion head, a lens shifter device comprising a bracket secured to said head, a lens shifter including a first lens shell, a second lens shell having its axis spaced from and parallel to said first lens shell and secured thereto so as to be moved therealong and enable longitudinal adjustment of said shells in relation to one another, a pivotal connection between said shifter and said bracket to enable said shells to be swung to position either lens shell with its axis in alinement with the projected light, a lens shifter handle secured to said shifter and stops to deAne the limits of swinging movement of said shifter. 1.823,162. ELECTRICAL REPRODUCTION OF SOUND FROM RECORDS. Laurence Herbert Pearson and Claude Marshall, Nottingham, England. Filed Feb. 12, 1930. Serial No. 427,764. 6 Claims. (CI. 179—100.41.) 1. A pick up for the electrical reproduction of sound from records, embodying in combination a permanent horseshoe magnet having hollow cylindrical pole pieces, said pole pieces being mounted on bracket members positioned adjacent to the two limbs of the magnet, a coil on each po'e piece, a metal reed resiliently suspended between the coils, the length of said reed approximating the diameter of the coils, a screw operating axially within each pole piece, cushion elements for damping the reed located on each side of said reed and said screws functioning adjustably to determine the position of said cushions.