The Film Renter and Moving Picture News (Nov-Dec 1922)

Nov. 4, 1922, THE FILM RENTER & MOVING PICTURE NEWS. (Technical Supplement). 77 EFFICIENT PROJECTION. New Devices—And Some Surprises. (By PATENT.) VERY day seems to bring nearer the perfect motion New devices and patents are being picture projector. regularly announced, and there can be little doubt that a big future for projection is amply assured, © What is’ very remarkable in the new devices is that they are mainly fundamental. The whole fabric of construction is involved, and the projector of the future will be found to be a vastly different machine from the one now in use. Inventors specialising in this most interesting subject have recently been exploring the possibilities of basic improvements, and in one of these it has been found possible to dispense with the Maltese Cross. | I am assured, on the authority of Will Day, who can claim to speak with intimate knowledge born of lengthy experience, that the new and perfect projector has arrived! © But we may have to wait a little before the trade can be convineed by actual facts and figures that such is the ease. And you can take it from ine it will require some convincing! In the meantime, quite a number of minor improvements to existing patente have been announced, and it will serve at this juncture to glance at some of these in this issue. New Objective Lens. I am authoritatively informed that the American inventor Many of the big factories in the States are devoting their whole time has been exceptionally busy during the past year, cvs . ba } . to the manufacture of projection equipment, and the problems of the operator's room are receiving expert and scientifie consideration. A new objective lens is one of the recent devices announced to the trade, and, so far as the experimental results are concerned, it has attained considerable success. It is mide in series 0-1-2-3-4 in all focal lengths from a 3-inch focus. The inventors elaim that they have departed almost entirely from the Petzvel type of lens, and were making the new lens Not only is the formula different, but an improvement has been effected in in accordance with an anastiymat formula. the lens barrel which tapers in such a fashion us to collect al! the light the and project it) through the aperture plate. concentrate — it The taperine of the transmitted = from source, barrel prevents, it is asserted, the escape of those ravs of light which the straight sided barrel did not prevent. Brilliant Black and White. The inventors of this new lens claim that it is a revolution in Pas principles as applied ‘to projection. Speaking to a representative of the ‘ Exhibitor’s Trade Review,” one of the patentees said 2 The new lens will project at least 50 per cent. more light than the Petzvel type. The definition is improved. Google and practically no colour will The brillianey of black and white on the screen with our new lens rays pass through, will make every one sit up and take notice. | Another innovation is that our No, 4 is adjustable, so that with one operation of one hand the focal length is increased. This adjustment is made without interfering with the definition or brillianey of the screen. The only change will be in the size of the picture. This will appeal especially to houses where vaudeville is used with pictures, and where changes are necessary in the picture due to the different locations of the screen— It is already being used with success with high intensity, and gives a beautiful, on the screen sometimes back stage and sometimes down stage. clear, bluish white picture."’ New Parabolic Condenser. The new spherical, or parabolic, condenser has also been This improved device was predicted last year, It has just emerged with satisfaction from several severe tests, one announced. when experiments had reached an advanced stage. of which was the presentation of a Prizma colour picture before the meniscus, but the difference is noticeable upon close examina. critics. The new condenser appears in shape to be a tion. The lens formula, I have been assured, is totally different from any even used in. the manufacture of condensers, and equips the projector with scientific optical glass, instead of The parabolic works in conjunction with an ordinary plano convex. the moulded variety of plate glass generally used. Results so far show that it gives a more brilliant picture, clearer and sharper and steadier. | This may be considered a big improvement over the condensers of to-day, High Intensity Lighting. There has been remarkable progress during the past vear in high intensity projection lighting. Only twelve months avo it was considered that high intensity was passing through the experimental stage. Now, it is generally recognised that it has emerged into suceessful recognition, and is claiming attention from exhibitors of all grades. In its carly stages it) wits believed that high intensity was mainly for use in large theatres, bur it is now recognised that it can be snecessfully used in the small kinemas. The quality. of the light) is essentially different: from that of the ordinary are, and the skill and attention required to operate. the new device are not beyond the powers of the ordinary projectionist. °° High intensity lighting is being heartily welcomed by the exhibitors who are out to secure the brightest possible light source ino showing the picture, And this, To oventure to assert, is the shownianship that pave!