Exhibitors Herald and Moving Picture World (Jul-Sep 1928)

40 BETTER THEATRES SECTION OF July 7, 1928 EXPERTLY developed colortones, meeting the needs of any projection lamp, are built into every Silversheet surface. Their secret is in the scientific mixing and application of the bronzes. Their advantages need merely to be seen to be appreciated . . . and Silversheet alone has them. Now you can have perfect screen results with any of the commonly used types of projection lamps. Silversheet's Colortone surface so adapts the light that a clear, sharp, deep and brilliant picture is seen by every patron in your house. Genuine Silversheets are made only by the American Silversheet Company, St. Louis and distributed through the National Theatre Supply Company. BESIDES showing the picture with uniform brilliancy to every part of thetheatre, the Silversheet Specification Surfaci allows an AVERAGE CURRENT SAVING OF 30% over cloth screens, which will many times pay back the initial cost of your Silvershee t , while giving far better results. SlLVERSHEEl Knohel Specification-Built Screen NOT A BATTERY CHARGER Strong full wave rectifiers Built solely for motion picture arcs. Not adapted to the application. The lasting results are proven. Over 500 in Daily Use Made and guaranteed by The Strong Electric Company 2501 Lagrange Street Toledo, Ohio t< You can't go wrong with a Strong" because of eliminating the heat, the film has longer life, it reaches the theatre in better condition, it does away with dried out patches which result in stops, create fire hazard, and annoy the patrons of the theatre. Aside from abolishing these annoyances, however, we directly improve projection and enhance the definition of the picture. The film being flat and unwarped and relieved of the intense heat at the aperture, there is no tendency for the film to iDuckle during projection. As a consequence, the projection lens is able to function to deliver to the screen a true projected image from a fiat focal plane. So important is this point that all the advantages of high corrections of the really excellent modem motion picture lenses are fully realized. All of the fine detail and gradations of the present excellent examples of motion picture photography are transmitted to the screen in a beautifully defined and sharply focused image. This cannot be accomplished where the intense heat of the light beam is allowed to reach the film, since under that condition the heat invariably buckles the film during projection and absolute true focus is impossible. * * * "In the fourth purpose, we find the new type shutter serves to reduce the fire hazard at least sixty per cent. First, because of the fact that the heat being removed from the film almost entirely, combustion would be retarded. Second, being positioned between the film and light source and having two vanes or blades there is a fifty-fifty chance that the vanes of the shutter would act as a fire shutter in the event that the mechanism or film should stop motion. Then there is the entire elimination of a fire hazard due to the drying out of patches and the dried condition of the film itself. "The fifth purpose is one also distinctly worthy and important. By a peculiar and carefully worked out design of the shutter construction wherein its ends are angled similar to the blades of a fan, but each end of different pitch, and by the addition of air disseminating vanes, we produce a circulation of air which draws the radiated heat away from the film tracks, tension shoes and springs, gate slide and cooling plates, so effectively that these important parts of the mechanism are always cool and in a condition to function perfectly at all times. "The shutter and its housing are constructed of cast aluminum. Its bearings are of the ball bearing type and due to the absence of friction, the entire mechanism operates more freely. We estimate there is a 25% less pull on the motor. * * * "A novel method of manually setting the shutter in time has been worked out so that this operation when necessary can be speedily and simply accomplished and in a way that does not in the least affect the ready removal of the intermittent movement. A locking device and a shutter setting knob conveniently located on the operating side of the projector is provided for securing fine limit timing of the shutter while the mechanism is in operation. In fact, all the advantages of the old outside front rotating shutter have been retained with none of its disadvantages. The complete enclosure of the new shutter and its operating parts as well, lessens the danger of injury to the projectionist. "A point readily realized by the projectionist is the fact that the new type shutter also eliminates the heating of the projection lens and in these days when it is customary to purchase high grade and expensive projection lenses, this is a point to be considered. Tiie construction of the new dowser is clearly shown in Figure 2. "The manifold advantages of our new shutter are sufficient in themselves to warrant the introduction of a new model of the Motiograph De Luxe projector. However, we have not stopped at this point in the new Model H Motiograph De Luxe since in it are incorpo