Motion Picture Herald (Jan-Mar 1932)

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54 Better Theatres Section March 12, 1932 M©W InVSntlOnS • • • illustrated descriptions of devices related to motion pictures and allied crafts, recently published by the U. S. government and selected for Better Theatres by William N. Moore, patent specialist of Washington, D. C. 1,799.789. STAGE lilGHTING SYSTEM. Walter C. Gwynne, HolHs, N. Y., assignor to Metropolitan Electric Mfgr. Co.. a Corporation of New Jersey. Filed Jan. 7. 1928. Serial No. 245,133. 5 Claims. (CI. 171—97.) 1. In a stage lighting system, an assembly of lighting circuits, a master switch for selecting and energizing any two or more of said circuits, and safety means including a contact on said switch functioning with said master switch to prevent the closing of said circuits. 1,709 646. SOUND-EMITTING APPAKATCS. Samuel Knben, New York, N. Y. Filed Aug. 16, 1929. Serial No. 386,476. 7 Claims. (CI. 179—113.) 1. An apparatus for reproducing sound waves in a gas comprising an aspirator having no moving part and a member of which is conical in form, a sound directing body, a wall of the aspirator being employed as an anode, a cooperating cathode extending within tlie space surrounded by said anode, means for Ionizing the gas between said electrodes l)y the discharge of a current through the cathode, and means for varying the volume ot the gas between the electrodes by potential variations of a current at audio frequency impressed npon the circuit of the electrodes. 1,799,799. SOUND fiEPRODUCEK. Warren C. Jones, Flushing, N. Y.. assignor to Bell Telephone Laboratories. Incorporated, New York, N. Y., a Corporation of New York. Filed Oct. 4. 1928. Serial No. 310,245, 4 Claims. (CI. 179 — 100.41.) 4. In a sound reproducer a casing containing viscous matter, a magnetic circuit carrying flux, a diaphragm forming a closure for the casing, a coil attached to the diaphragm luid disposed in the flux antf a stylus adapted to flex the diaphragm about a diameter. 1,799,795. SOUND RECORDING AND REPRODUCING. Joseph W. Horton, Millburn, N. J., assignor to Bell Telephone Laboratories, Incorporated, New York, N. Y., a Corporation of New York. Filed May 5, 1928. Serial No. 275,409. 10 Claims. (CI. 179 — 100.4.) 2. A method of recording and reprodncing a band of frequencies extending down to zero frequency which consists iri translating said band into other frequencies representative of said band, recording said other frequencies, reproducing said other frequencies and retranslating said other frequencies into said band. 1.799,942. SOUND TRANSFOBIVONG AND REPRODUCING APPARATUS. Gunther Wurdel and Fritz Spiegel, Berlin, Germany, assignors to Walter Vollmann, Berlin, Germany. Filed Sept. 5, 1928, Serial No. 304,000. and in Germany May 5, 1928. 12 Claims. (CI. 181—31.) 1. Sound transforming and reproducing apparatus, comprising a box, and a diaphragm of large area mounted on said box and composed of a plurality of sections having independent movement, said sections being separated from each other at their adjacent margins and connected with each other at their median parts, and flexible members covering the gaps provided between the adjacent edcea ot said sections. 1,799,748. FILM REEL. Arthur C. Hayden, Brockton. Mass. Fi'ed Oct. 3, 1927. Serial No. 223,501. 5 Claims. (CI. 242-74.) 1. A film reel for motion picture apparatus comprising a pair of plates, a hub between the plates adapted to have a film wound thereon, and a spring member located tangentially on the hub and secured thereto, said spring member having a free end with a pair of spurs thereon adapted to enter feed_ holes in the film, the free end of said member normally being a substantial distance from the hub to facilitate the spurs catching into holes of the film when the film is dropped between the plates toward the hub. 1,808.603. MOVING PICTURE RECORDING AND PROJECTION APPARATUS. Marcel Remy Hue, Toulouse, France. Filed Mar. 19, 1927, Sarial No. 176,742, and in Belgium Mar. 23, 1926. 7 Claims. (CI. 88 — 16.8.) 1. A film manipulating apparatus comprising in combination a fixed cylindrical film guiding surface having an aperture formed therethrough, a film storage reel, a film windup reel, a rotatable shaft located intermediate said reels, a cam mounted on said sliaft, a