Movie Makers (Jan-Dec 1953)

270 OCTOBER 1953 News of the industry Up to the minute reports on new products and services in the movie field Brownie F/1.9 A new model of Kodak's most popular movie maker — the Brownie 8mm. movie camera — featuring a fixed focus //1.9 Cine Ektanon lens, has just been announced by the Eastman Kodak Company. Listing at $49.50, the new camera is said to be the only unit with an //1.9 objective ever to be offered at such a low price. With the exception of the faster lens, this new Brownie camera is identical in all respects with the standard f/2.1 model. This latter camera will continue to be offered at $39.75. Baia editor New this month is the Baia Standard action editor, a product of Baia Motion Picture Engineering, Inc., 120 Victor Avenue, Detroit 3, Mich. Featuring the company's characteristic "quick takedown" design, the Standard editor is comprised of 800 foot rewind spindles, the Baia splicer and the action viewer. List price without case is $56.75, while a fitted carrying and storage case is offered at $7.95. $$ for ideas At the close of 1952> $1,672,368 had been paid to employees of Eastman Kodak during the 55-year operation of the company's suggestion system. The highest single award, $11,386, was made recently to Irving Fellows, an engineer in EK's Navy Ordnance Division, who conceived an idea for revising a stacking assembly fixture. Radiant Thrifty The Thrifty, an in expensive table and wall model projection screen, has been announced by Radiant Manufacturing Corporation to sell for $3.95, $4.95 and $5.95 respectively, in sizes of 18 by 24, 22 by 30 and 30 by 30 inches. The surface is Radiant's PermaWhite fabric. Victor 1600 Arc A new and portable 16mm. arc projector, the Victor 1600 Arc, has been announced by the Victor Animatograph Corporation, of Davenport, Iowa. Comprising the unit are three easy-tocarry pieces — a rectifier, speaker and lamphouse. These components, finished in Victor sage green, can be assembled and put in operation in less than five minutes. Designed for school, church and in THE BROWNIE, Eastman Kodak's popular movie maker, is now yours with f/1.9 lens at $49.50. dustrial uses, the Victor 1600 Arc delivers 1600 lumens on the screen for a 58 minute show without change of carbons. The machine will list at $1845. Sholderpod Strikingly similar in its essential design to the gunstock camera mount pictured by Warren A. Levett, ACL, in Gadgets Galore (see Movie Makers, October 1952), Sholderpod is a new, lightweight camera base which should appeal to cine and still cameramen alike. Designed with three-way adjustments to accommodate all cameras in any shooting position, the unit rests the weight of the camera on the shoulder rather than against the armpit. Sholderpod, which lists at $9.95, is a product of Monu Inventions Corporation, 1966 Park Avenue, Denver, Colo. Quickies Enteco Industries, Inc., 610 Kosciusko Street, Brooklyn, are now making adapter rings and filters to fit the Astro-Berlin lenses which range in focal length from 125mm. through 400mm. All Wollensak lenses containing cemented elements will now employ thermo-setting cement. The adhesive is VICTOR 1600 ARC, designed for school, industry and auditorium use, is latest in Victor Animatograph's line of sound projectors. said to be stable throughout temperatures ranging from — 60° to 4~±(30° Fahrenheit. Kodak Hawaii, Ltd., a subsidiary of the Eastman Kodak Company, will pass its quarter century mark this year in Honolulu. Fred B. Herman, Kodak Hawaii manager known to many ACL visitors to the Islands, remains on the job. Some elements of sound [Continued from page 263] back to back within a rectangular frame sealed by two flexible membranes. The crystal elements are held together by two resilient mounting pads, located in such a manner as to provide proper damping characteristics and to separate the elements, permitting them to deflect under application of sound pressures. No diaphragms are required, since sound pressures contact the crystal elements directly. The completed unit is impregnated with wax to render it airtight and moisture proof. Each crystal element consists of two thin Rochelle salt plates cemented together. The assembled unit is mounted in a housing to provide ease in handling and protection to such a sensitive device. Let us suppose that the sound waves set up by the original source are impressed upon the microphone. The pressure on the crystal elements tends to cause them to bend. Since the edges of the elements are firmly fastened in the frame, the bending will cause the elements to be strained and a small voltage will be generated in them. By connecting the two elements together electrically, the voltages generated are added to produce a larger voltage. ELEMENTS OF THE AMPLIFIER Much more space than we have available would be required to explain thoroughly the operation of the amplifier. For the purpose of this discussion we need only to say that the amplifier is a combination of electrical components, such as resistors, condensers, vacuum tubes and transformers, which builds up small voltages to higher voltages. These are delivered through the output transformer to the speaker. These voltages, of the same wave form generally as the sound waves, cause currents to flow through the speaker coil. ELEMENTS OF THE SPEAKER There are several types of speakers, such as the moving coil type, the crystal type and the older and no longer used moving armature type. Since the moving coil (permanent magnet) type is the most popular one we will limit our discussion to it. As shown in Fig. 7, the permanent magnet speaker consists of a permanent