Motion Picture Herald (Apr-Jun 1931)

May 9, 1931 Motion Picture Herald 71 bills, that I would not care to discard it except it be absolutely necessary." It may, I think, be generally accepted that, taking the perforated sound screen , as our example, the reduction in illumination will be approximately 10% by reason of perforation. This is not, of course, an accurate estimate. Also, it would vary somewhat with different makes of screen. However, we may accept it as sufHciently j near the fact to use in practice. ' It must however be remembered that if this exhibitor has a silent screen say one year old, and he substitutes for it a new perforated screen surface of the same sort, it may reasonably be accepted as fact that instead of a decreased illumination he will ; really have an increase. In other words the , reflection efficiency of the new surface j would be so much greater than that of the f year-old one that the 10% perforation loss J should, and in all human probability would be very much more than counterbalanced. It would only be after a year of j l use that the 10% loss would come, though l^! the deterioration in reflection efficiency would begin immediately upon installation of the screen and would continue to grow, jl day by day, week by week and month by month, so long as the screen be used without cleaning. That is an item which re|j ceives too little attention from exhibitors, I'! theatre managers and projectionists. I have many times advised, and do again advise exhibitors to insist upon the jij manufacturer who sells him a screen sup' plying a sample of the surface at least eighteen inches square. Compare the samli pie very carefully with the screen surface 1 itself. Make sure they are identical, and i that the sample is new. Then wrap the ] sample in black cloth and lay it away in a ; dark, dry place, where it will lie perfectly I flat. Good plan to lay it on a closet shelf, under other papers or things, i With such a sample in hand the projectionist or manager may at any time make an understandable test of his screen surface reflection powers, or rather of how much those powers have fallen off, merely by I suspending the sample against some portion j of the screen surface, being certain that it I lies perfectly flat against the screen. Turn ' the white light on the screen and if the sample and screen appear as of equal brightness, then all is well. If not, then you know that reflection power has decreased, and you may easily judge as to just about I exactly how much, or if a light measuring '•■ device be available, you can determine the matter accurately. DISCOVERED: 'PROJECTION' RECENTLY I received a reprint I* of an article by Willard Howe, which prei sumably appeared in one of the trade papers. In this article Mr. Howe first rather apologizes for having followed the lead of this department and finally arrived at the conclusion that the man who projects motion pictures and sound really is something more than a machine operator. Mr. Howe then consumes considerable space advertising some school course, and explain TS \mi HOSEY KEEP IT SAFE/ .ARD cash — the money you take in during each business day — presents a constant invitation to hold-up men and burglars. They make it their business to discover the places where cash is unguarded. You should make it your business to see that your money is beyond their reach. The York Round Door Chest meets every requirement of the modern Motion Picture Theatre and has a record for successful resistance to burglars that is unexcelled. When installed, it is anchored in a block of solid concrete which gives complete protection against fire and absolutely prevents removal from the building or attack at any point except the heavy thiefproof door. The York Chest will pay for itself in a reasonable length of time by the saving in burglary insurance alone. Illustrated Folder describing the York Round Door Chest in detail will be sent gladly on request. '1/ORK Safes YORK SAFE & LOCK CO. YORK . PENNSYLVANIA NO MORE LOOSE CHAIRS! Firmastone fsistens loose theatre chairs to concrete floors permanently. Simple to use. ChemicaJ cement — Sets in ten minutes. For further Infer GENERAL SEATING COMPANY 3109 Montrose Avenue ChicEigo, in. THE NEW TIFFIN I CURTAIN CONTROL Motion Picture Patents My Specialty PATENTS William N. Moore Patent Attorney Loan and Trust Building Washington, D. C. The first important step is to learn whether you can obtain a patent. Please send sketch of your invention with $10, and I will examine the pertinent U. S. patents and inform you whether you are entitled to a patent, the cost and manner ot procedure. Personal attention. Established 35 years. Copyright your play $5.00 Trade-Mark your goods or titles $30.00