Exhibitors Herald World (Oct-Dec 1929)

Record Details:

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72 BETTER THEATRES SECTION OF December 21, 1929 New Inventions The list of patents published in this technical department of "Better Theatres" is furnished by our patent reporter— 1,736,454. THEATRE-LIGHTING CONTROL APPARATUS. James C. Masek, Irwin, Pa., assignor to Westinghouse Electric & Manufacturing Company, a Corporation of Pennsylvania. Filed June 10, 1927. Serial No. 197,826. 5 Claims. <C1. 171—97.) 1. In a three-conductor distributing system having a neutral conductor and two feed conductors, a plurality of load circuits each having loads connected to the neutral conductor and to separate said feed conductors, a plurality of separately operable switches for controlling the circuits through the said separate conductors and a corresponding number of double-pole selector switches for each load circuit for selectively connecting the said separate conductors to a selected separately operable switch. 1,736,323. SYNCHRONOUS DRIVING DEVICE. Sidney A. Murdock, Los Angeles, Calif., assignor by mesne assignments, of one-half to Orlando E. Kellum, Los Angeles, Calif., and one-half to Mary G. Kellum, Los Angeles, Calif. Filed July 30, 1925. Serial No. 46,982. 7 Claims. (CI. 172—293.) 6. In a device of the character described, a controlling commutator comprising two disk-like members relatively rotatable about a common central axis, one of said members being adapted to rest on a phonograph disk and be rotated thereby, the other resting upon the one, cooperating electrical contacts carried by the two disks, and the upper one of said disks having a projecting arm adapted to act as an anchor against rotation. 1,735,861. TUNED RADIAL HORN. Miller Reese Hutchison, West Orange, N. J., assignor, by mesne assignments, to Acoustic Products Company, New York, N. Y-, a Corporation of Delaware. Filed Aug. 4, 1927. Serial No. 210,550. 1 Claim. (CI. 181—27.) In a loud speaker, a cylindrical hollow casing of small cubic content, twelve sound resonating tubes each arranged to resonate a different note of the chromatic scale and disposed radially around said casing and communicating therewith, said tubes having closed outer ends and being flattened at their inner ends in the direction of the axis of the cylindrical chamber, a sound propagator connected to the back end of said casing, and an outwardly flaring bell connected to the front end of said casing. WILLIAM N. MOORE Washington, D. C. 1,735,335. TALKING-PICTURE APPARATUS. Freeman H Owens, New York, N. Y. Filed June 13, 1927. Serial No. 198,647. 8 Claims. (CI. 179—100.1.) 8. In a sound reproducing system film mechanism for moving a film having a sound record thereon, a pair of rotatable sprocket members, a transparent cylindrical member mounted between said sprocket members and rotatable therewith, a pair of parallel finger members arranged to engage opposite edges of said film for pressing the film into engagement with said transparent cylindrical member, a tapered carrier disposed between said finger members, a glass slit positioned in said tapered carrier and having the edges thereof engaging the surface of said film, a light source disposed adjacent said slit for directing light rays thereon, a light sensitive cell positioned on the opposite side of said cylindrical member, and a framing member having a light aperture therein for subjecting said light sensitive cell to light rays from said source under control of the sound record on said film. 1,727,891. PROTECTING SCREEN FOR CINEMATOGRAPHIC APPARATUS. Andre Noel Merle, Vincennes, France, assignor to Pathc Cinema, Anciens Etablissements Pathe Freres, Paris, France. Filed Feb. 17, 1928. Serial No. 255,028, and in France July 29, 1927. 3 Claims. (CI. 88—18.4.) In a cinematographic view-taking apparatus, a partition on one side of which a perforated film is adapted to travel and provided with an elongated slot, a claw on the other side of said partition and adapted to engage said perforated film through said slot, a feeding mechanism for reciprocating said claw along said slot, a screen independent of said feeding mechanism provided with an aperture for said claw and supported by said claw opposite said slot, the length of said screen being at least equal to the sum of the length of said elongated slot and of the length of the stroke of the claw along said slot, whereby said elongated slot is constantly covered by said screen, and guiding means for said screen adapted to hold said screen near said partition. 1,737,993. PROJECTION APPARATUS. Lester W. Bowen, Hasbrouck Heights, N. J., assignor to Griffen & Rowen, Inc., New York, N. Y., a Corporation of New York. Filed Aug. 28, 1925. Serial No. 53,022. 6 Claims. (CI. 88—24.) 1. An arc lighting unit of the class described for motion picture projectors contained within the lamphouse of the projector which comprises a frame portion and supporting bars rigidly associated with said frame portion and constituting essentially a part thereof, said bars having a sliding engagement with the lamphouse, whereby the lighting unit may be shifted bodily with respect to the lamphouse, guide members extending longitudinally of said lighting unit, electrode holders mounted for longitudinal movement with respect thereto, and adapted to carry the electrodes in end to end parallel relation, adjusting means for effecting such movement of said electrode holders, means for independently adjusting one of said electrode holders in a vertical direction, and means for adjusting the other of said electrode holders in a horizontal direction, whereby alignment of the electrodes with their longitudinal axes in the same straight line is effected. 1,736.557. PROCESS AND APPARATUS FOR THE PRODUCTION OF RELIEF IMAGES ON CINEMATOGRAPH-FILM STRIPS. John Edward Thornton, Jersey, Channel Islands, assignor to John Owden O'Brien, Manchester, England. Original application filed Mar. 27, 1927, Serial No. 174,945, and in Canada Mar. 17, 1927. Divided and this application filed Mar. 22, 1928. Serial No. 263,853. 6 Claims. ..(CI. 95—88.) kit 1. A process for producing a series of colloid relief images upon a continuous film-strip, carried out as a continuous and automatic process, consisting in applying a solvent in a plurality of stages, the first stage removing most of the soluble colloid from the film-strip, and the next stage removing the remainder of the soluble colloid left on the film-strip after the first stage. 1,737,872. ARRANGEMENT TO PROTECT CAPACITIVE LOUD SPEAKERS AGAINST PUNCTURE. Manfred von Ardenne, Berlin, Germany. Filed Apr. 28, 1928, Serial No. 273,633, and in Germany Apr. 28, 1927. 4 Claims. (CI. 179—111.) 1. Means for protecting capacitive loud-speakers against breakdown, comprising a high ohmic resistance and a condenser shunted across said resistance in an input lead of said loudspeaker.