Moving Picture World (Jan-Feb 1925)

January 31, 1925 MOVING PICTURE WORLD 511 Decidedly Clever Allie Barron, Projectionist T. and D. Theatre, Lodi, California, has sent what seems to me to be the first mechanical — electrical change-over signal I have looked at which I could and would commend, without reservation, to the favorable attention of projectionists. Other devices have been clever, but up to this time none has quite filled the bill, because they only were capable of giving one signal, while that of Brother Baron gives both a light-up and a change_over signal. Unfortunately, however, I am unable to publish it exactly as Baron sent it in, because he depends upon a ground for the completion of his electrical circuit, and grounds are not always reliable ; also it apparently presumes completing the circuit through the projector ground, which is a thing the Underwriters would not approve of, and if it were done and a fire occurred it would automatically void the theatre insurance. I have therefore redesigned the apparatus to the extent of inserting fibre in places which completely insulate th^e electric circuit from the projector. Otherwise the device is exactly as Brother Baron made it, if I have correctly understood his drawing. In the drawing, the solid black is insulating fibre. Examining the drawing, A is the upper magazine of the projector. B is a roller, which Brother Baron designates as a fibre roller, but which I would myself suggest to be one of the rubber covered rollers which paper hangers use for rolling seams down. C is a steel bar, square in shape and long enough to serve its obvious purpose. D is a metallic bearing, presumably brass, through which steel bar C slides. I would myself suggest a roller at either end of this bearing. It clamps to the magazine wall, as shown. E is a metal support for fibre piece G. F is a brass piece carrying adjustable contacts I and J, the purpose of which will be readily understood. H is a binding post connecting one circuit wire to F, I and J. R is a spring clip to hold bar C back while threading up. K is a buzzer, L a dry battery, P a single pole switch. M is a fibre insulating piece, adjustable on bar C, carrying contact spring piece N. O is a loose wire end of the circuit, attaching, by soldering, to spring contact N. This wire may be non-electrically attached to part D at point X, if desired, just to provide a point from which the slack wire can swing. . How It Acts And now here is how it all acts, though you probably have grasped it at a glance. The upper end of spring contact N is so adjusted that, as bar C slides downward as the roll of film on the upper reel, on which roller B rides, it will just touch contact I, thus making electrical contact and ringing the buzzer until such time as the contact is automatically broken as bar C works further down. This contact gives the “LIGHT UP” signal. It may be set for any desired distance from the reel end within the range of the length of bar C. This contact is set to suit by adjusting parts I and M, and then contact J is so adjusted that point Q of spring contact N will strike it about four feet (of film) from the point of desired change-over. Reasons for Change I trust Brother Baron will pardon my change in the electrical circuit. I could not publish it otherwise, because of reasons already set forth. If the position of the apparatus seems objectionable, I see no reason why it could not be placed up top of the magazine, with a I^-inch square bar passing directly down and riding directly on top of the film roll. The steel weight is presumably merely to insure bar C not sticking in the bearing. I think, however, a small roller under the upper end of bearing D, and another at the top of the other end of the bearing, would obviate any tendency to sticking, and make the apparatus pretty nearly 100 per cent. Any projectionist can make it himself, using heavy sheet brass for D, E and F. What do the rest of you think of it? It looks good to me. CLASSIFIED ADVERTISEMENTS Help and Situations Wanted Only 3c per word per insertion Minimum charge 60c Terms, Strictly Cash with Order Copy must reach us by Tuesday noon to Insure publication In that week’s Issue. SITUATIONS WANTED MANAGER, now employed, managing three theatres, wishes change. Considerable experience and success with Photoplay, Vaudeville and Roadshow attractions. Consider only propositions from reliable people. References. Box 358, Moving Picture World, New York City. MANAGER — Projectionist desires permanent connection with first-class house. Ten years’ active work as projectionist, manager, assistant manager and chief projectionist large chain of theatres. Mechanic and electrician. Go anywhere. References. Married. Box 360, Moving Picture World, New York City. ORGANIST desires permanent position, first-class theatre, with good modern organ. Experienced. Expert picture player and feature soloist. Complete library. Union. Organist, Room 236, Princess Hotel, Atlantic City, New Jersey. THEATRE WANTED WANTED— To lease modern theatre seating 800 or more — for term of years in town of at least 30.000 population, preferably much larger. PTtted to play either Pictures, Vaudeville, Stock or Musical Comedy. By experienced, reputable and financially responsible party. Can take possession at once. Give full particulars in detail in first letter. Confidential. ADDRESS BOX 359 Moving Picture World, 516 Fifth Ave., N. Y. City WELDED WIRE REELS ' for Salo by Howells Cine Equipment Co., 740 7lh A„., New T«rk MAILING LISTS MOVING PICTURE THEATRES 21,7 76 Moving Picture Theatres, per M $5.00 3.674 Legitimate Theatres, per M 7.56 327 Colored Moving Picture Theatres 5.00 1.059 Film Exchanges i.... 10.00 162 Manufacturers and Studios 3.00 411 Moving Picture Mach. & Sup. Dealers. 4.00 A. F. WILLIAMS 166 W* Adams Street CHICAGO THEATRE ANALYST stH !clalizing I Years of Experience in Theatre Operation. Specializing — Pictures and Circuit Management. I can diagnose your troubles and suggest the remedy for your present situation. Contracts — Deals — Systems and General Operation. New finishing contract with one of the Biggest Producing Film Exhibition Companies in the World. Highest Reference from Leaders of the Industry. also Bank. Never a Failure. Business and Social Record — Clean. Private Investigation for Financial Interests. Temporary or Permanent Connection Solicited. At Liberty Feb. 1st. Address WJG, c/e M. P. World. LUXALBA CONDENSERS Made from PYREX GLASS are GuEuranteed Against Breakage Supplied in 4j4-in. diameter 6)4-in., 7)4-in., 8j4-in. focal lengths $6.00 Each Recommended by F. H. Richardson THE LUXALBA COMPANY L. W. Atwater, Sole Agent 111 West 42nd Street, New York