The motion picture projectionist (Nov 1931-Jan 1933)

36 Motion Picture Projectionist December, 1931 s Still Preferred Above All Others MORE Miehling books have been sold to projectionists than any other .... There have been others since Miehling's book was brought out .... and some at a lower price .... but Miehling's still remains as the only book written by a projectionist for prejectionists .... That it why it is so overwhelmingly popular. In this book you will find a thoroughgoing explanation of the fundamentals of all sound equipment. Western Electric and RCA outfits of all types are fully treated as to construction, wiring, functioning and trouble-shooting. There is also a practical discussion of the most widely used independent sound equipment. Every projectionist will find his needs adequately fulfilled, both as to the theory and practice of sound operation. SOUND PROJECTION By MIEHLING Member of Local 306, Motion Picture Operators Union of New York City, Engineer, Designer of sound equipment and practicing projectionist. 519 pages . . . completely indexed XhIRTY-ONE chapters, each covering a phase of sound equipment operation, are thoroughly indexed in the back of the book, affording the projectionist full means of reference in case of trouble. The whole set-up of the book has been designed for leisurely reading or for quick use in a breakdown emergency. O NE hundred and thirty-seven illustrations: diagrams, schematic drawings and photographs are scattered through the book, adjacent to connecting text. Continuity of text and picture is thus preserved throughout. A perfect book for projectionists. Price $4.00, We Pay Postage Mancall Publishing Corp., 7 W. 44th Street, New York City Send me Miehling's Sound Projection. Enclosed find remittance of $4.00. Name Address City and State Position Theatre ratio of 10 to 1. This transformer may be used for the series — parallel group of four speakers if the group is connected to terminals 2 and 3. However, if this transformer is used it must be pointed out that for two speaker operation the voice coils must be connected in series as shown in diagram (b) of Figure 6. If the series — parallel group of four speakers are to be operated from a push-pull power circuit as shown in Figure 4 then the group of four speakers may be connected to terminals 1 and 3 of the 14 to 1 ratio transformer. Likewise, if two speakers are to be operated in parallel they are to be operated across terminals 2 and 3. Nearing the Television Goal Line (Continued from page 22) The question is constantly raised, of course, as to how imminent television really is as a widespread reality for the home and the theatre. There could be no acceptance of television, of course, as long as television was confined to the laboratories. Today, however, there are broadcasting stations operating on regular schedules and their activities are gaining increasing space in the columns of the newspapers. The radio commission is besieged by additional applications for television broadcasting licenses. Additional companies are constantly going into the business of manufacturing, but, obviously, television has not the proper impetus and still is lagging behind. If the time comes when commercial instead of experimental licenses are granted to television stations television will receive a very substantial boost. The field, of course, is in something of a vicious circle. The real inducement to prospective builders of transmitting stations is the existence of a large "seeing" public but, similarly, the most forceful excuse for the purchase of a television set is the existence of proper broadcasting facilities. Any added impetus at this time must come from an intensive development of the broadcasting and manufacturing ends of the scheme. Public Interest Increasing There is no question but that television is causing ever-wider interest. Thousands of people saw the demonstrations of Sanabria television in New York, and during the next few months many more thousands all over the country will be introduced to television. It is only through the proper presentation of television that the future of the art can be expedited. George Gruskin, president of the Sanabria organization, has arranged with William Morris, the veteran showman, to supervise the presentation of the television units in theatres. An organization has been developed to develop the various presentation aspects of television. Questions of makeup, television types, studio technique and others are being carefully considered. The motion picture, however, will continue to play a formidable part in the evolution of television. It will provide for some time to come the most comprehensive and adequate subject for television. The development of visual broadcasting may be slow for the time being but its ultimate development is as inevitable as the continuance of talking pictures, and between these two fields there will be a kinship which will finally develop television to its highest points. Sell Portable Talkie Sound on-Film to Theatres, Schools, Churches Clubs, etc. Write for manufacturers' prices on Soundheads, Photocells, Optical Systems, Rectifiers, Amplifiers, Horns, Faders, Synchronous Motors, Projectors, Lamphouses, Screens, Microphones, etc. S. O. S. Corporation Dept. M. P., 1600 Broadway New York City Cable Address, "SOSOTJND" Patents (Continued from page 30) Every patented article should appear with the statutory marking as required by law. This marking includes the word "Patent," followed by the number of each issued patent. If this patent marking is not followed, the patent does not become invalidated, as some think, but a very valuable right is lost. For, should the patent later become infringed, its owner cannot collect profits and damages for any infringement prior to the date that the infringer was notified of the infringement and requested to cease; whereas, had the article been properly marked, as above, no other form of notice to the infringer is necessary, and for any infringement which can later be shown to have taken place prior to the time that it was discovered and the suit brought, the profits and damages covering that back period, limited only by the Statute of Limitations, may be collected by the owner of the patent. This right is thus frequently of great value, and suggests the desirability of always marking every patented article with its patent numbers. Such marking, furthermore, is usually very good advertising, since it gives a dignity and sense of value