Boxoffice-April.07.1958
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•:<br />
MOST POWERFUL<br />
THE<br />
NEW<br />
LAMP OF ALL TIME<br />
firings Moor Zheatre<br />
Quality Projection<br />
to the Cargest<br />
Drive-Jn Screens<br />
DELIVERS DOUBLE THE LIGHT<br />
projected by any 16>/2' reflector lamp, and 51 % more light than any<br />
lamp using a f 1.7/fl.8 lens.<br />
PROJECTS ALL FILM WIDTHS BY ANY<br />
PROCESS WITHOUT CHANGE OF REFLECTORS<br />
The main mirror, an integral part of the rear door, is of the cold glass type, 21 inches<br />
in diameter— the largest ever put into regular production. It has a 6>4' focal length and<br />
41 -inch working distance. Aperture spot size is changed by a convenient control which<br />
shifts the position of the main reflector. The position of the burner need never be changed.<br />
DELIVERS 65,000 LUMENS<br />
for Fox CinemaScope 55 mm (1.340 x 1.06);<br />
56,000 lumens for MGM 65 mm and Todd-AO 70 mm;<br />
55,000 lumens for CinemaScope 35 mm (.912 x .715); and<br />
46,000 lumens for small aperture (.825 x .600) 35 mm.<br />
A TOTALLY DIFFERENT SYSTEM I<br />
Light reflected to the screen by conventional type lamps is picked<br />
up solely from the flat, disc-like face of the arc by a single mirror.<br />
Since brilliance increases as an arc is constricted, air jets supplied<br />
by an integrated blower, have been arranged in concentric circles<br />
around the positive carbon and directed toward its burning end. The<br />
resulting THREE DIMENSIONAL, cylindrical<br />
shaped light source<br />
increases the available pickup angle to more than 260°. Since the<br />
conventional reflector pickup angle is only 160°, an auxiliary 4-inch<br />
spherical reflector, is located behind the positive carbon to reimage<br />
this increased availability of light to the main mirror where it is<br />
combined with the light from the crater. A 10 mm x 25" non-rotating<br />
Ultrex positive and rotating Vis" x 12" solid Graphite negative bum<br />
at 140 to 160 amperes and 70 to 78 volts. A 10 mm x 25' Hitex<br />
positive may be burned at 125 to 140 amperes. Aperture heat is no<br />
greater than when burning an 8 mm copper coated trim at 70 amperes<br />
without a heat filter.<br />
The companion 220 volt, three-phase selenium rectifier can be<br />
located at any distance from the lamp and the power controlled<br />
remotely from the lamp instrument panel. Heat generated by rectifiers<br />
need no longer build up in the projection room.<br />
For further ditails write<br />
THE STRONG ELECTRIC CORPORATION<br />
1<br />
1 cm run avenue TOLEDO 1, OHIO<br />
The MODERN THEATRE SECTION
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