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Projection engineering (Jan-Dec 1931)

Page scan 000185 from Projection engineering

Record Details:

Title:
Projection engineering
Date:
Jan-Dec 1931
Publisher:
New York : Bryan Davis Publishing Co., Inc.
Volume:
Projection engineering (Jan-Dec 1931)
Leaf #:
000185
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Date Added:
July 04, 2024
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BUT . . . THE "CHICAGO" SOUND-ON-FILM PORTABLE PROJECTOR delivers reproduction comparable to that of the most expensive and complicated installations. A few of its outstanding features are: Uses theatre size 35mm. film, with sound track, thus giving ample film area for large theatre size pictures and sufficient volume for 1000 people. Does not employ — synchronous motors — turn tables — flexible shafts — discs — needles — tone arms — batteries— ground wires. Automatic speed control. Operates on any A.C. circuit range from 90 to 122 volts. Fewer parts — therefore — minimum servicing. The DeVry sound head can be installed in DeVry Projectors which are not equipped for sound on film. The expense is small. PRODUCTS BY H. A. DE VRY Sound-on-Film Projectors (Portable) DeVry Sound Recording Apparatus (Disc) DeVry Air Speaker, the new Public Address System with more volume Battery Eliminators Condensers Photo Electric Cells Vacuum Gauges DeVry Radio Beacon Compass HERMAN A. DE VRY, INC. Dept. B. 55 E. Wacker Drive, CHICAGO.