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Kneisley Electric Develops Miniaturized Silicon Rectifiers for Projection Room
At the request of Mel Glatz. designer and purchasing agent for Fox Intermountain, Denver, Colo., in his quest for the elimination of costly booth wiring, The Kneisley Co., utilizing a new version of ventilation, has reduced the size of their 115, 140, and 180 ampere, 3 phase, silicon rectifiers from 42^2 "x24"xl8" to 20"x20"xl2". Simultaneously, transformer operating temperatures were reduced appreciably.
These designs, utilizing waste space in the booth, mount over the pedestal base, beneath the projector motor, reducing usable floor space requirements from 3 sq. ft. to l/7th sq. ft. Costly wiring is eliminated. Only one 3-phase line need be brought into the rectifier through a 4" surface gutter positioned beneath the rectifier.
Flue aperatures in the tops make possible stacking out the heat loss of the rectifiers into the lamphouse exhaust system, so that you do not
pay for air conditioning loss; nor do you heat up the projection room in the summer, if not air conditioned.
Three models, M115RTK2, M140RTK2, and M180RTK2, utilize the R-1325 480 ampere heavy duty silicon stacks. All 230 volt rectifiers have voltage ranges of 190 to 250 volts. Odd voltage designs are available. Four rough and eight fine current adjustment taps, conveniently located, replace switches. Emergency studs are provided, on the terminal board, so that either rectifier can operate either lamp. Automatic arc striking current minimizers are supplied with each rectifier. Nothing has been sacrificed, quality-wise, to attain compactness, the company states.
Being only 20" high ( without the detachable legs used for installations adjacent the pedestal) they can be positioned directly beneath the lamphouse in 70mm installations. The base of the rectifier is solid sheet
From Coast to Coast
From the
Music Hall
to
Graumann's Chinese
For Good Projection It's Hurley All the Way
HURLEY SCREEN COMPANY, INC.
96-17 Northern Blvd., Corona, N.Y.C. (See your theatre supply dealer)
CREATE THE RIGHT MOOD EVERY TIME WITH THE
Major Mood Music Library
MAJOR offers you a full forty-five hours of mood music for
titles, bridges, backgrounds.
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THOMAS J. VALENTINO, INC.
Established 1932 150 West 46th Street CI 6-4675 New York 36, N. Y.
metal, as the ventilating system is located in the lower front of the rectifier.
The M115RTK2 miniaturized KniTron silicon rectifier is housed in a rectangular steel case, designed to set adjacent the lamphouse pedestal, providing "on the spot" current adjustment, eliminates wiring and direct current line losses.
The rectifier consists primarily of three transformers, an R-1325 (480 amp. ) Silicon Stack, a filter capacitor, blower type ventilating system, one control panel for wide range current adjustment and voltage control, one fine current control panel, and a three pole relay.
On a panel behind a hinged door, in the left side of the rectifier, are the wide adjustment and voltage control taps. A heavy duty three-pole
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NATIONAL STUDIOS
42 West 48 Street, NYC
12
International Projectionist March, 1965