The Exhibitor (May-Aug 1948)

Record Details:

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Each of the two mechanisms are identical mechanically, are very simple and of few parts, a solenoid operated pawl actuating a ratchet wheel secured to the driving worm. There are no clutches, reducing gears, or linkages. (See Photo 1.) Feed Control Change of feeding speed of each carbon is controlled separately by a simple turn of a knob, which controls the speed of carbon feed by changing the number of impulses fed to the solenoid through its electronic timer. (See photo 5.) Feeding speed of carbons is maintained as accurately as an electric clock, holding the carbons in proper focus and at proper distance apart throughout the entire time the lamp is in operation. This perfect feeding mechanism, by maintaining the arc in correct and con¬ stant focus, maintains peak screen illumi¬ nation throughout the picture showing, without change in intensity or color. Reflector The 14 inch diameter B and L Reflector is securely mounted to the lamp base in¬ stead of on a swinging door, thus holding proper alignment without frequent adjust¬ ment. The reflector adjustment in both the horizontal and vertical planes is made at the outside front of the lamp instead of at the rear, so that the projectionist can see the screen when making adjustment. An additional adjustment is provided for moving the reflector to front or back for peak adjustment of focal length, making it unnecessary to shift the lamp on its pedestal to obtain this result. (See Photos 2, 3, and 4.) Electronic Timers One timer is provided for each carbon, each of which has its own control knob conveniently placed on the lamp housing to control feeding speed. The range of control is such that at lowest position, the feed is too slow, and, at highest setting, too fast, for any size or kind of carbon used. The timer is a simple device employing a small thyratron tube with fixed resistors and condensers connected into a simple circuit. Both timers are identical and in¬ terchangeable. They are connected in cir¬ cuit through a connection plug which makes all connections, and can be removed from the lamp by merely separating the plug connection and lifting them out of their wells. (See photo 4.) Warning Light A small lamp is provided which lights when the carbon left in either holder is burned to a length where the carbon will only last for 22 minutes longer. The warn¬ ing light stays lighted until the lamp is re-trimmed. (See Photo 5.) Arc Image The arc image device is designed so that it may be placed on either side of the lamp at will, and projects a clear image of the arc visible from either side. There are many other important features built into this unique lamp to make its opera¬ tion as perfect as can be had. (See Photo 5.) Light Output The maximum light that film can stand without damage is 15,000 lumens, which can be obtained from this lamp with 70 ampere arc. This will give a clear visible picture on screens as large as 50 feet in width, clearly visible at a distance of 500 or more feet, making an ideal light source for the drive-in theatre and a most eco¬ nomical one. The electronic lamp is designed to burn any size carbon at any desired amperage, and is ideal for any theatre of any size. Operational tests under actual theatre conditions were conducted at the Avon, Newark, N. J., where the regular projectionist, Charles Earle, kept records of carbon consumption and current requirements. E. J. HALEY — President, Booker T Theatres, Raleigh, North Carolina — writes: “Sound service is one of the vital functions of successful theatre operation. We have found RCA Service to be competent and responsible in supplying this need.” To get the benefits of RCA Service —write: RCA SERVICE COMPANY, INC., Radio Corporation of America, Camden, New Jersey. BUY NOTHING Until You've Com¬ pared Our Prices! This will give you an idea of our low prices and the savings that can be made by deal¬ ing with us. Write us for whatever you need, whether thumb tacks or complete theatre equipment. SIMPLEX MECHANISMS, with genuine Simplex rear shutters, BB movements, spiral shockproof gears, rebuilt like new and guaranteed . $302.50 SUPER-SIMPLEX MECHANISMS, genuine, rebuilt and guaranteed . $425.00 RCA 30 watt theatre amplifiers, brand new and complete . $137.50 SIMPLEX HIGH 1 Kilowatt lamphouses, rebuilt like new, and complete with rectifiers and new tubes . $575.00 POWERS 6B MECHANISMS, rebuilt like new . SI 14.50 REEL CABINETS, 2000', brand new, per section . . $ 2.95 WEBER SYNCRO-MAGNETIC Model 400 soundheads for Simplex, complete with motors, rebuilt Pair, $325.00 STAR CINEMA SUPPLY CO. 459 W. 46th STREET, NEW YORK 19, N. Y. NO NEED FOR WASTE OF SEAT COVERING MATERIAL You can now buy leatherette already cut 25"x26". Packed in packages of 50. All colors, good quality. $26.50 per package. Wri.e— MANKO FABRICS CO., INC. 29 W. 26th Street, New York 10, N. Y. June 2, 1948 PHYSICAL THEATRE DEPARTMENT of THE EXHIBITOR PT-13