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SOUNDlviAJ
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SOUND-HEADS AMPLIFIERS TWO-WAY fibRN SYSTEMS
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ONE KILOWATT +ilGH INTENSITY PROJECTION ARC LAMPS
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The
LIGHT on your
SCREEN
By CHARLES E. SHULTZ
Member SMPE . . . Honorary Life Member LOCAL 365, lATSE & MPMO
The Trans>Lux System Of Rear Profection
THIS K THE Story of a persistent pioneer, Percy N. Furber, developer of the Trans-Lux projection system that opened the way to a special kind of theatrical enterprise.
The early 1930's were a period of great change in the motion picture industry. The "movie" at last had found its mighty voice and with it the greater requirements of projection were being recognized by exhibitors every
fulfiUment of this plan would be realized only when the following problems could be mastered :
1. The design and construction of an. "ultra" short focal length lens.
2. An optical component within the projection lens for reversing the projected image upon the rear of the translucent screen.
3. A special arrangement of the projectors; that would bring the centers of the lenses to. within 12 inches of one another without inter-; ference to accessibility of threading and main-; tenance. Jj
4. A technique for weaving a one piece,]
Schematic representation of the Trans-Lux rear projection system, showing positions of the projectors relative to the projection axis. The shaded strip across the bottom indicates the projection port wall; the areas with diagonal lines are the ports, that at left the observation port for the right projector, the wide port that for both projection and observation from the left projector.
where. This revolutionary period found Mr. Furber deeply engrossed in practical plans for the introduction of a new form of theatrical enterprise, based on a technical development to meet limitations of building space so that standard store rooms could be used for motion picture presentation.
Mr. Furber's idea centered about the creation of a rear projection arrangement that would permit the use of a translucent screen and projection facilities contained within the amazingly shallow depth of some 25 feet. The
seamless translucent screen up to 18 feet wi(^ from non-inflammable materials. He plac^ his optical problems before several exper in the optical field to obtain their advice as j, the best theoretical design for such an unusu system. They promptly advised him that \ requirements were theoretically impossible accomplishment.
But Mr. Furber, was stubborn ; he belieyi that there could be a practical solution of, "theoretically impossible" problem. With u shaken faith in his ability to overcome t
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