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JROWR RECTIFIER SAVES EVEN MORE THAN PROMISED
"Your local dealer . .
pointed out that we would save about
$35 per month on our electric hill.
Actually we save close to $42 per
month since we have changed over
from our generator. It is good to
know that we can depend upon you
and your dealer organization."
— D. At. Pearce
Atcarale Drive-In Theatre, tl Poio, T»xof
DESIGNED
FOR THE OPERATION
OF 2 ARC LAMPS
This new type silicon diode stock transformer-rectifier, Is the most economical means of power conversion ever manufactured. No flicker or other change in projected light when striking the second arc.
DEPENDABLE
"Lo-Strike*"
feature associated with each output protects the silicon stacks from overload, and prevents destruction of carbon crater upon sinking the arc.
»>fc
SAVES ON INITIAL COST!
Sellt for 15% lets than two of the loweit priced 90-135 ampere rectifiers, and costs less to install. Requires only one line service.
SAVES ON SPACE
Requires one-third to one-half less floor E space than two separate rectifiers spaced for proper ventilation.
DUAL OUTPUT RATING OF
60-85/ 60-85 AMPS/ 35-45 V
75-105/ 75-105 AMPS/ 48-61 V 90-135/ 90-135 AMPS/ 56-70 V 120-160/ 120-160 AMPS/ 58-75 V
SEND FOR LITERATURE
The
Electric Corp.
31 City Park Ave., Toledo 1, Ohio
Not supplied as regular equipment on 60-85 ampere and 75-105 ampere models.
INTERNATIONAL
PROJECTIONIST
Including a special Audio-Visual section relating to the operation and maintenance of A-V equipment in the educational and industrial fields.
January 1964 Volume 39 No. 1
FRANK W. COOLEY, JR. Editor and Publisher
RAY GALLO Executive Publisher
AL BLOOM Managing Editor
TOM KENNEDY Equipment Editor
RAY GALLO ASSOCIATES
National Advertising Representatives
545 Fifth Avenue, New York 17, N. Y.
Telephone Murrayhill 7-7746
(Area Code 212)
IN THIS ISSUE
Tinted Release Print
Film Conclusion 4
By Robert A Mitchell
Picture News 12
Kollmorgen's Talaria Lenses 13
A-V Design Conference 1 4
News Notes — Technical Hints — Miscellaneous Notes
INTERNATIONAL PROJECTIONIST, published monthly by the International Projectionist Publishing Co. division of The Northern Publishing Co., Post Office Box 6174, Minneapolis, Minnesota 55424. Editorial offices, 1645 Hennepin Avenue, Minneapolis, Minn. 55424. Subscription Representatives: AUSTRALIA — McGills, 183 Elizabeth St., Melbourne; NEW ZEALAND — Wixon's, Ltd., 64 Courtnay Place, Wellington; ENGLAND and ELSEWHERE — Wm. Dawson & Sons, Ltd., Macklin St., London, W. C. 2. Subscription rates: United Slates, Canada, and U. S. Possessions, $3.00 per year (12 issues) and $5.00 for two years 24 issues). Foreign countries: $4.00 per year and $7.00 for two years. Changes of address should be submitted four weeks in advance of publication date to insure receipt of current issue. Second-class postage paid at Minneapolis, Minn. INTERNATIONAL PROJECTIONIST assumes no responsibility for personal opinions appearing in signed articles, or for unsolicited articles. Entire contents copyrighted 1964 by INTERNATIONAL PROJECTIONIST PUBLISHING CO.
35 and 70mm
viiMHi
• ■-::.,
"*. * . ..
International Projectionist January, 1964