The motion picture projectionist (Nov 1929-Oct 1930)

Motion Picture Projectionist October, 1930 20/40 to 100/200 Ampere 2 Bearing Actodector. MEET ANY REQUIREMENT A range of from 20 to 600 amperes makes Roth Multiple Type Actodectors adaptable to any size theatre. Any number of arcs can be carried within their ampere ratings — they maintain uniform intensity of illumination, even during change-overs. Their smooth, quiet performance makes them particularly desirable for sound equipment. . . . Widely used by the large circuits because of their demonstrated ability to meet the particular power requirements in the projection !>ooth. . . . Furnished in 2 and 4-bearing types. ROTH BROTHERS AND COMPANY Division of Century Electric Company 1400 W. ADAMS ST. CHICAGO, ILL. ACTODECTOR. "THEY KEEP A-RUNNING" F. S. C. COLORSHEETS DeSy the Heat Replace common colored gelatines Will not fade Will not turn brittle Samples on request FISH-SCHURMAN CORPORATION 45 West 45th St. 6364 Santa Monica Blvd. New York City Hollywood, Calif. from processing, which again is a laboratory problem, or from later handling, again up to the projectionist. The importance of care in rewinding to prevent scratches in the film is very great, and much as may be said on this point it can scarcely be overemphasized. As dirt works in and fills up the scratches they may become the cause of a considerable background of film noise. Film noise is present throughout as a background to the sound record. It will be most evident when the music or other sound is recorded on the film in small volume and it will be least evident or even unnoticeable when the recorded sound volume is great. However, if loud volume is obtained by boosting the fader setting on a piece recorded very softly, the film noise is also amplified up and may become exceedingly objectionable. Similarly, if there is a section of the film, such as a title, on which there is no sound recorded, the fader should be brought down to zero until the sound resumes, thereby keeping the film noise from becoming evident to the audience. ERPI Wins "Mixer" Suit A decision has been handed down by the United States Circuit Court of Appeals of the Third Circuit in Philadelphia in the case of Frederick K. Vreeland and Frank L. Dyer against the Victor Talking Machine Company, which action was based on Vreeland and Dyer United States Patent No. 1,593,735 dated July 27, 1926, for "Art of Recording Sounds." This action, which related to the "mixing" arrangement for using a plurality of independent microphones or sound pick-ups with a single recording circuit, has been defended throughout by the Electrical Research Products, Inc., on behalf of the Victor Talking Machine Company in view of the recording license from the Products Company to the Victor Company and also in view of the fact that the sound picture licensees of the Products Company make wide use of the mixer panels alleged to have been covered by the patent referred to in their use of recording apparatus supplied them by the Products Company. The decision of the District Court which was in favor of the patent holding it valid and infringed, has been reversed by the Court of Appeals and the claims of the patent sued on have been held invalid. S. M. P. E. Fall Meet in N. Y. The Fall Meeting of the Society of Motion Picture Engineers has been definitely set for New York City on October 20-23, inclusive. The Pennsylvania Hotel will be the headquarters for the Convention. General announcements relative to the meeting as well as a list of papers scheduled for presentation will be forthcoming at a later date.