Motion Picture News (Oct-Dec 1930)

90 Motion Picture N e w s November 1 , 1930 Acoustic, Other Devices Listed {Continued from page 88) a great plurality of successive signals of non-uniform duration, and transmitting the signals of relatively long duration each in a period of time less than the period required to produce an audible sound. 1,774,744. ONE-MAN ORCHESTRA. Paul T. F. Cenci, Los Angeles. Calif. Filed May 9, 1929. Serial No. 361,659. 3 Claims. (CI. 84—170.) 3. In an apparatus of the class described, a support for a musician's body comprising a seat proper, having an edge portion positioned to permit the limbs of the musician to extend thereover, a switch having an operating arm which upstands from said seat proper adjacent said edge portion thereof in position to be engaged laterally by the limbs of the musician when seated upon said seat proper to close said switch, and a musical instrument the operation of which is controlled by the opening and closing of said switch. 1,774,298. AUTOMATIC FADE SIGNAL FOR MOTION-PICTURE REELS. James H. Stanfield. Kaufman, Tex., assignor of one-fourth to Albert H. Walker, one-fourth to O. A. Coleman, and onefourth to T. A. Coleman, Kaufman, Tex. Filed Oct. 3, 1929. Serial No. 397,096. 7 Claims. (CI. 116—67.) 1. In combination with a motion picture reel having a hollow core, an audible signal mounted in said core, means for effecting a continuous sounding of the signal, a spring actuated slide comprised in said sounding means, and a tongue for insertion between adjacent convolutions of film, said tongue having a hinge connection with said slide. 1.773.436. POLARIZATION" PHOTOMETER. Wilbur B. Ray ton and Henry F. Kurtz. Rochester, X Y . assignors to Bausch & Lomb Optical Co., Rochester, X. V., a Corporation of New York. Filed Oct. 21, 1926. Serial No. 143.554. 7 Claims. (CI. 88—23.) 1. A polarization photometer comprising a polarizing element, an analyzing element and co-operating beam separating and lens elements, the said separating and lens elements being arranged at the side of said analyzing element which is farther from said polarizing element, means for effecting relative adjustment berwetn said polarizing and analyzing elements, said means being provided with scale means for indicating .aid adjustment directly in terms of light transmission. PATENTS 1.773,335. IMAGE MODIFIERS. Adelbert Ames, Jr., and Charles A. Proctor, Hanover, N. H. Filed June 21, 1922. Serial No. 569,992. 4 Claims. (CI. 05—81.) 1. An image modifier screen having a central clear spot not adapted to irregularly refract incident light, and a surrounding region containing refractive surfaces irregularly oriented in all directions, the said screen having an increasing refractive effect toward the margin of the s"creen. Flame-Proo/ing Wood Bests Metal in Test AFLAME-PROOFING WOOD which held back smoke and flame six times as long as did a metal-covered door carrying the label of the Fire Underwriters' Ass'n at a test conducted by Columbia University, is a development of Henry Klein and Company of Elmhurst, L. I. The immunity of the wood to the ravages of fire is brought about by impregnating lumber under high pressure with a secret chemical preparation. When attacked by fire, it is said this chemical throws off a gas which kills fire on the same principal as a fire extinguisher. In each row of cells of the wood are deposited minute chemical crystals. As one row of cells comes in contact with the flame it offers temporary resistance to the fire and is in turn supported by the millions of rows of cells behind it. The test was conducted for Klein. The metal-covered and the wooden doors were set in the sides of a large furnace, the flames sweeping their interior faces. The metal-covered door quickly became untouchably hot, passing 120 degrees in about three minutes, and in fifteen minutes passing 660 degrees. The wood door's exterior reached 100 degrees after thirty minutes and at the end of forty-five minutes was still under 150 degrees. It did not go over 200 degrees at any time. In the metal-covered door, after ten minutes smoke poured through the joints in heavy clouds and flames appeared. The wooden door held back both smoke and flames for a full hour until it was less than one-eighth of an inch thick. Whitman Qives Patent Dope (Continued from page 88) and all queries involving patents, trademarks, designs, etc. The current group of questions and their answers, in detail, follow : Q. — A neighbor has offered to back me to finance patenting and marketing my invention providing I include his name as coinventor. Is it all right to do this ? — Allan Dagnan. Albany, N. Y. A. — No. If your neighbor is not in 'ruth a co-inventor and an unfriendly party learns of the arrangement, the patent can be declared invalid. You can doubtless satisfy your neighbor by giving him a 50% interest in the proceeds made out of the invention. (Be on your guard not to assign outright any portion of your title to your patent. ) Q. — My employer insists I must assign my patent to him on the ground that it was developed on his time and the patent filed at his expense. The patent has since proven of great value and I wonder if the law requires me to do this ? — M. Granville, Harrisburgh, Pa. A. — Xo. The employer may only obtain from you a shop right or license to use the invention, unless there has been previous specific understandings. Q. — Please advise if there is any way to protect my invention from some one getting ahead of me to the Patent Office while I am still experimenting on it. I am told by a local attorney about a paper called a Caveat which can be prepared and signed, and which is much less expensive than filing an extra patent application. — J. Davidson, New York City, N. Y. The Caveat Law A. — There is no way now to prevent sonic one getting ahead of you to the Patent Office with an application for a patent on an invention without filing your application first. The law of Caveat was repealed July 1, 1910. It provided for an inventor giving notice to the Patent Office of incomplete inventions by a signed paper called a Caveat, which explained the purpose of the invention or discovery and its distinguishing characteristics and asked protection of the inventor's rights until he should have matured his invention. It was required to be filed in the confidential archives of the office and to be kept in secrecy and it had to be renewed from year to year to keep it enforced. The person filing it was entitled to be notified of any application for a patent made during the lifetime of the Caveat, which application, if granted, would interfere with the invention claimed therein, and was entitled to priority by reason thereof. The next best thing to do. in the absence of your ability to file the application as soon as possible, is to prepare a description and sketch of your invention known as an "Evidence of Conception" and sign and date it before a notary and retain such papers in the event of an interference proceeding later. This might prove priority of conception and entitle you to the patent over a claimant.