Motion Picture Herald (Jan-Mar 1932)

74 MOTION PICTURE HERALD February 27, 1932 literated by the surrounding incandescent surface, so that for all practical purposes the crater floor of the shell of the carbon is of even luminosity. I would highly appreciate it if the National Carbon Company engineering department would comment on this — also, advise us as to the actual difference as between the core and shell luminosity of the ordinary straight d. c. arc. Projection Light Source Discussed At Special Meeting ■ [The following is a report by F. H. Richardson of a special meeting of the New York Branch of the Society of Motion Picture Engineers.'] The New York Branch of the Society of Motion Picture Engineers was invited to attend the regular February meeting of the Society of Illuminating Engineers, at the plant of the Sperry Gyroscope Company. The attendance of the SMPE branch was not very large, and the absentees missed something they may never again have the opportunity to view. The first paper or talk was by our old friend Bassett, long connected with the development of motion picture projection light sources, but now with the Sperry Gyroscope Company, engaged in both research and development work. The talk was on arc light sources and was accompanied by rather amazing motion pictures of arc lights, both straight arc and high intensity. By motion pictures I mean that side views of the actual arcs were projected successively upon a screen. The arc itself was far back in another room, the light beam coming forward through an opening in the wall. The colors developed on the screen were nothing less than beautiful. The opportunity actually to examine arcs in operation at a magnification of around 50, was a very real treat. The various gas streams were visible, and their paths could be followed. Even the electronic stream was visible at high amperages. We were given what seemed to be visible proof that the action or current flow is from negative to positive. We watched the action of the gas streams, of the crater floor and of the flame as the current flow was gradually increased from low to as high as about 150 amperes, though this action was not altogether a true action, for the reason that it was impractical to stop and change carbons, hence one carbon diameter was made to serve for all amperages. The talk of Bassett was most enlightening and interesting, particularly with regard to the high intensity arc. It was the first time the projectionist has ever been afforded the opportunity to have a really visual examination of arc action, or to hear a really lucid, understandable explanation of high intensity arc action. In addition to all this, we were privileged to see the demonstration of huge searchlights, etc., and were given much valuable information. For example, we were told that, whereas the ordinary old-fashioned crater floor could give only from 150 to 160 candlepower per sriuare millimeter, the high intensity light source can develop from 500 to 1,000 candlepower per square millimeter, while the sun at noon on a clear day, gives only about 900 candlepower per square millimeter. Palmer Stilson Resigns as Traffic Manager of Paramount Palmer Hall Stilson, for the past 15 years general trafiic manager of Paramount Publix, has resigned. He was in charge of exports and imports worldwide, supervised domestic, mail, express, freight shipments and carloads to theatres, and devised, formed and installed systems which have been used by Paramount throughout the world. For several years he was chairman of transportation for the old National Association, during which time he standardized the type of film shipping cases presently in vogue and systematized label requirements, acceptance of scrap films for freight shipment without mutilation and numberless other improvements. His committee was successful in having international postal authorities accept film for mailing to foreign countries. Sanabria To Extend Public Poll on Use of Television The Sanabria Television Corporation has decided to continue the test vote inaugurated at the recent Chicago radio show, along national lines, as a result of the previous reaction, when 20,000 people indicated their willingness to pay for television programs on a basis similar to payment for gas or electricity. Watch WASHINGTON, D. C. March 14-15-16 The seat of our Government and birthplace of its current legislation .... The meeting of the year and the most representative and most influential exhibitor body in the industry .... The ears of our elected representatives listening to the voice of a united theatre owner and industry front .... Protect your investment, it's worth fighting for .... On to Washington — the center of diplomacy, the architecturally perfect, the historically endowed. We repeat . . . Watch Washington! All Exhibitors Welcome! 12th Annual Convention M. P. T. O. A. MAYFLOWER HOTEL Make your reservations NOW!!! National Headquarters: 1600 BROADWAY, NEW YORK