Reel and Slide (Jan-Sep 1919)

26 REEL and SLIDE llllllllllllllllillllllllllll !1I!II!III!I11!I!!!!I!!III!I(IIIIII!II!I!!III!IIIII!IIIIIIIIIIII!III!!IIII!IIIII!IIII!IIIII^ Illlllll Illllllllllllllllllllllllllllllllllll lllllllllllllllllllllllllilllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllM Proj # Any questions pertaining to the projection of films and slides s-^ s~%<4-<* ^-^ .*** on the screen will be answered by this department. Address fczl I 111] "Projection," Reel and Slide, 418 So. Market St., Chicago. ^•/ ^^ *'-B-^^ -"--*• If an answer by mail is desired, enclose stamped envelope. Illlllll!llllllllllllllllll!llllll!l!llllllll!illlllllll!llllllllllllllllllllllllllllllll!!llllllllll!lliy All About the Projectors (Many requests reach this office for information concerning the various types of moving picture projectors. Reel and Slide will print in this department a complete description of each machine now on the market for the benefit of its readers. —Editor.) The New Premier Pathescope projector, manufactured and distributed by the Pathescope Company of America, is the last word in modern projection equipment. It is the result of long and intensive experience and study on the part of the Pathescope engineers, and embodies all the newest ideas and many exclusive features of this system of motion picture projection. Its chief feature, next to its excellent illuminating qualities, lies in its simplicity of construction and operation, making it especially valuable for institutional use. The Premier Pathescope is built to project any subject in the Pathescope, special width, non-inflammable film library, which is available at any of the Pathescope branches in the chief cities of the United States and in Canada. The Premier is equipped with Universal motor. It can be readily attached to any electric light socket of either direct or alternating curernt and put into immediate operation. Or, the motor may be disconnected at any time and a convenient crank attached, under which conditions the machine may be fed from either a storage battery or dry cells with success. The makers of the Premier Pathescope claim that it will utilize 62^ per cent of the light in illuminating the screen, which is said to be a record. The Premier is so designed that it gives a flickerless image on the screen. A special cabinet is supplied for the New Premier Pathescope and is mounted on a special tilting baseboard, which is pivoted in the middle to permit of convenient projection at varying elevation of screen (desirable for large audiences) and also, by completely inverting the machine, of disappearing within the cabinet, which, when closed, resembles a music cabinet. The cabinet contains a tilting reel drawer, and all the wiring, lamp, etc., for the Pathescope. It is furnished in mahogany, or in golden, fumed or Flemish oak. large diameter. The No. 2 Gundlach lens and the 65 millimeter diameter Bausch and Lomb lens are examples of objectives which are being used with marked success at the present time with Mazda lamp equipment. The use of a Mazda lamp in place of an alternating current arc for motion picture projection makes it possible to equip the machine with a three-wing shutter and thus eliminate the objectionable flicker which is the usual characteristic of a two-wing shutter. This enables the institution with alternating current supply to secure re Auxiliary Equipment (Continued from December) The objective lens used with the arc may be retained if the picture is fairly small and the length of throw short. In many cases, however, it is advisable to install a new objective lens of The new Premier Pathescope, made by the Pathescope Co. of America. suits equal to or superior to those obtained by direct current and at the same time secure a number of other advantages. There are, in general, two methods of controlling current supplied to the Mazda lamp in motion picture service. The most economical method is to use a transformer which is provided with means of regulating the current supplied to the lamp. The primary of the transformer is connected to the supply circuit and in the secondary circuit there is an ammeter so that the current required can be accurately determined. An ammeter is essential, because different lamps take_ somewhat different currents, and the value specified for any lamp must not be exceeded. Control equipment of this kind is being manufactured for the Precision Machine Co. by the American Transformer Co. This transformer is small and compact, has very accurate current control and is provided with a starting resistance to limit the rush of current into the lamp. One Fill In and Give This to Your Nearest Theater Owner Proprietor Theater, City. I am anxious to have my young people see, and myself should like to witness, an exhibition of the following moving picture feature: Name of picture Producer Exchange If your theater is willing to regularly exhibit films of this class and type, you may count on the regular attendance of members of our institution and their friends. Signed Date Address size which is now ready for the market is suitable for the 600 and 750 watt lamps. A second size is being made up and will be suitable for the 1,200-watt lamp. The Fort YVayne Works of the General Electric Co. have brought out a transformer for use with Mazda lamps on motion picture machines. This equipment consists of an auto-transformer and includes an ammeter in the secondary circuit. A starting switch is provided and also a means of controlling the current. Other transformers have been developed and are for sale by the Enterprise Optical Co., Chicago, 111., LeaBel Co., Chicago, and the Argus Lamp & Appliance Co., Cleveland, Ohio. » * # On direct current circuits the control equipment must consist either of a motor-generator set which will reduce the voltage of the line to that required by the lamp, or a rheostat in series with the lamp. The latter method of control is the -heaper to install, but, of course, it necessitates considerable loss in the rheostat. It is also possible in many cases to use a rheostat in the srimary circuit of the compensator which has been used for supplying current to an alternating current arc lamp. If control equipment of this kind is adopted, an ammeter should be provided in the lamp circuit and the rheostat should be adjusted so that the current supplied to the lamp is of the specified value. By using a rheostat in the primary circuit of the compensator which has been in service on the arc lamp the cost of installation is reduced and at the same time the advantages of the Mazda lamp may be obtained. Universal Adds Another to the Firestone Series AN industrial film has been completed by the Universal Film Manufacturing Company, under the direction of Harry Levey, that is unusual not only from .the standpoints of editing and directing, but from the patriotism it expresses through the intention and purpose of its sponsor, Mr. H. S. Firestone, president of the .Firestone Tire & Rubber Company of Akron, Ohio. The significant title chosen is "The Winning Wheels of War." The subject generally is motor truck transport, in particular truck tires, their importance and the care that should be given to their maintenance. Here enters the patriotic feature that might well be emulated by all manufacturers in war time. Instead of urging the necessity of spare tires, or presenting any facts that would lead the truck owner to buy more and more tires, the film, through Mr. Firestone, preaches the gospel of 'tire conservation in the strongest possible terms. The whole is an intensely interesting review of the importance of the motor truck in the life of the nation with special references to its use in war activities. The picture shows how the newer, broader conception of motor truck necessity came first from France in 1914, where motor cars and motor trucks turned the tide at the Marne and the flood of man power and materials from Paris halted and threw back the German onrush. While the railroads would not serve, the flexible, adaptable transporting power of gasoline accomplished the impossible. _ The picture recalls to us that at that time America knew the motor truck as a valuable utility, but not as a basic necessity. But the motor truck was ready. With new and undreamed of tasks to be performed, _ never had a nation produced as this nation did.