Motion Picture Herald (Jan-Feb 1936)

or making poor contact — unless the same equipments are used for both projectors. Probably, however, it lies farther along. Examine the exciter lamp of No. 1. make sure its contacts are perfect, including socket and lamp base, remembering that "perfect" includes cleanliness. Be certain its filament is not at all sagged and that it is exactly at right angles with the axis of the optical system ; also, that it is in exactly the correct position vertically. Next, examine the lens combination of the optical system, making sure that it is free from oil, both inside and out and that on it are no invisible finger prints. Then examine into the position of the light beam at the soundhead aperture, making certain it is exactly in alignment with the slit therein and exactly centered, vertically, thereon. A very small displacement will cut down on sound, both in volume and quality. Examine the slit itself, making sure it is not in any degree clogged with dust or dirt. If everything is all right up to here, then go after your No. 1 photocell. See to it that all its connections are clean and electrically perfect. See to it that its active elements are in good condition. In fact, it might be well, before doing anything else, to switch photocells, placing No. 1 on No. 2, and vice versa. If this switches the trouble, that settles it ; the photo cell is the goat. Then follow right on to the loudspeaker circuit connection, beyond which it is unnecessary to go, as both projectors use the same circuit from there on. In fact, when anything of this kind shows up, the only thing to do is start at the first piece of sound apparatus that is not used by both projectors and follow right through to the loudspeaker circuit, carefully examining every connection and every part of every bit of apparatus all along the way, making such tests as may be necessary to ascertain whether or not each item is in perfect condition. I cannot of course describe all the tests required. Your Bluebook of Projection and manufacturer's instructions booklet will provide that information. LIGHT SOURCES IN SMALL THEATRES MARTIN G. SMITH of Smith & Beidler Theatres, which owns and operates several playhouses in and around Toledo, Ohio, writes: "Please refer to pages 276 and 277 of your latest Bluebook of Projection, paragraphs 2 and 7. I would very much appreciate it if you would advise whether or not you would consider as a 'small theatre,' one seating 959, using a I5x20-foot screen, projection distance approximately 120 feet, and one seating 808, with an 18-foot picture, projection distance approximately 100 feet. "We are using Da-Tone seamless white screens, a.c. lamps, National copper-coated carbons, 8 mm. At times there is considerable flicker noticeable in these two theatres, and I am wondering whether or not the a.c. lamp is the one you refer to as 'one new type of high-intensity alternating current AND OBTAIN MOST IN Screen Illumination Accuracy Dependability Service High Resale Value Your investment is protected for in the 24 years Brenkert Products have been in use in theatres, repair parts have always been readily available and Brenkert owners have enjoyed nation wide service. Demand Brenkert — A size and type for every theatre requirement — and enjoy complete satisfaction. Sold and serviced by distributors covering the continent. Literature on request. BRENKERT LIGHT PROJECTION COMPANY Engineers and Manufacturers DETROIT, MICHIGAN IT'S A FAR CRY fro m nickelodeon seats to IDEAL CHAIRS IDEAL CI Grand Rapids Michigan. CHAIRS ARE AN <I Board seats and park benches served equally well in the days when comfort had no connection with entertainment. Sticky varnish, clothes tearing and finger and foot pinching were expected. <I But time marches on! Improvements have been many and constant. <U For a perfect conception of what modern chair design and construction offer see the newly styled r Ideal Chairs. <][ Write for the name of your nearest independent supply dealer, or illustrated literature. ADDED ATTRACTION TO EVERY THEATRE Easy Method Ledger System SEYMOUR, INDIANA Consisting of two books — Ledger with Federal Income Tax Records and Film Invoice Record — Each covers a period of two years — Price complete, $6.50 (little more than lc per day) Cash with order or C. O. D. Keep your records clear by ordering NOW. Use Better Theatres Services 'EASTERN" MICROPHONE STANDS A High Quality Line Available in floor and table models for all microphones. Write for cataloj. EASTERN MIKE STAND CO. 56 Christopher Avenue Brooklyn, New York January 11, 1936 33