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1948-49 Theatre Catalog, 7th Edition, Page 415 (402)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 415
Page 415

1948-49 Theatre Catalog, 7th Edition, Page 415

A New Line of Projection and Sound

Ballantyne 1948-49 Equipment for Theatre Sound and Projection Offers One More National Equipment Line

During the past year the Ballantyne Company, manufacturers of theatre sound equipment since 1932, has introduced a number of new equipment items to the industry. Included are the new streamlined soundhead, a new streamlined projector base, a new 4570 high intensity are lamp, a complete new line of Lightmaster high intensity rectifiers, an all-new line of two-way horn systems, the new MX series drive-in theatre amplifiers and the new Soundmaster drivein speakers. Already established in the field as a specialist in theatre sound equipment, the Ballantyne Company for the first time in its history has entered the theatre projection field, having purchased the complete assets of the L. J. Gardiner Company, and is now manufacturing an improved projector under the designation of the Ballantyne Model ifRi, Projector.

New Model 8 Soundhead

Ballantyne has added a Model 8 soundhead, a streamlined version of the Royal Soundmaster. Production on the lower

priced standard Model 6 soundhead will be continued.

The outstanding feature of the new Model 8 soundhead is a novel gyro-filter developed by F. C. Largen, Sr., design engineer at the Ballantyne Creighton, Nebraska, plant. Possessing allegedly perfect gyroscopic action, the filter is composed of all-steel units, ball-bearing mounted and permanently sealed, assuring a smooth film travel over the rotary scanning drum and a life time of trouble-free operation. Tests show it to eliminate as completely as possible all flutter in operation. It is claimed to be positively foolproof, and will not get out of balance nor leak oil.

Other features include the following: The motor is enclosed in a well-ventilated, streamlined housing that is attached directly to the main frame casting of

SOUNDMASTEH Model 14 two-way horn system.


The Ballantyne Company

This article describes a new complete line of projection and sound equipment for the modern motion picture theatre. Included are: projectors; projector bases; sound/leads; amplifiers; speakers; and rectificrs. A concise summary of dala on each item is given together utith'advan(ages claimed for the equipment by the manufacturer. This companfs drive-in theatre equipment will be found listed and described in the section on Drive-ins, under appropriate headings.

the soundhead; and a large handwheel is located at the front of the motor housing for convenience in threading soundhead and projector. The all-gear projector drive and the gyro-filter are protected by a single guard with provision for oiling without removing the guard. Doors are heavy corrosion-resistant cast aluminum, designed for perfect alignment with the doors of the projector mechanism. Inside, the soundhead is finished in white porcelain enamele beautiful in appearance and easy to clean. The outside of the soundhead is finished in gray wrinkle to harmonize with projectors, bases, are lamps, magazines, and other equipment.

New Hi-Ini'ensii'y Arc Lamp

The most recent development in Ballantyne hi-intensity arc lamps is a multipurpose lampea lamp which allows the operator to use a given amount of amperage for optimum light in his theatre

SOUNDMASTER Model 20 two-way horn system.

and yet have reserve amperage for outstanding contingencies, such as color film and film of greater density.

Every feature in a modern hi-intensity lamp is claimed for the Lightmaster Model 4570. It has a 14-inch Bausch & Lomb refiector at a 32-inch working distance, designed for optically perfect performance with an f/2.0 lens.

From 45 to 70 amps, and at any light level between, the Lightmaster Model 4570 projects a steady, brilliant light that is distributed uniformly over the complete screen area. The projectionist may select the amperage needed for any given picture by setting the rheostat for the proper positive carbon feed, and, if needed, by a simple adjustment of the micrometer drive on the negative carbon, can obtain the steady light intensity desired.

Obsolete, troublesome electro-magnets are replaced by a steel loop, mounted on the carbon guide and magnetized only when the arc is burning. The lamp is designed particularly for drive-in theatres and actual tests show that at 70 amperes it projects 15,000 lumens at the screen. This is the maximum amount of light that can be projected through an aperture plate without danger of damage to the film.

Internal features include: Positive carbon holder designed to hold either 7 or 8 mm. carbons, negative carbon holder to accommodate either 6 or 7 mm. carbons; jaws that cannot break carbons when making carbon trim; positive and negative carbon support near arc; precise carbon positioningeboth vertical and horizontal negative alignment means provided; dual feedingeboth negative and positive carbons are fed independently by separate feed screws; full 10inch travel on positive carbons; reliector held in cast aluminum frame and adjustable on its optical axis; non-wearing, oil-less shafts--full ball-roller and self SOUNDMASTER Model 30 two-way horn system.

1948-49 Theatre Catalog, 7th Edition, Page 415