Amateur talking pictures and recording (1933)

Page scan 000158 from Amateur talking pictures and recording

Record Details:

Title:
Amateur talking pictures and recording
Date:
1933
Publisher:
London : Sir Isaac Pitman & Sons, Ltd.
Volume:
Amateur talking pictures and recording
Leaf #:
000158
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
May 02, 2024
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146 AMATEUR TALKING PICTURES is the projection lamp which is of the 100 watt type. From the projection optical system the film passes over a pressure roller, then round the sound drum over another idler roller, an impedance roller and back to the take-up sprocket reel. The exciter lamp housing is shown to the right of the sound drum, and between it and the sound drum is the PROJECTOR SWITCH AND AMPLIFIER. VOLUME CONTROL Fig. 71. R.C.A. 16 mm. Sound -on-Film Portable Projector projection of a casting which carries the lens assembly. We look in vain for the photo-electric cell, and the arrangement of this is one of the ingenious features of the equipment. The optical sound system of the R.C.A. portable is shown diagrammatically in Fig. 72a, where there is an exciter lamp, sound optical system, and photo-electric cell as in our diagram Fig. 71. Instead of the thin light beam passing direct through the sound track on the photo-electric cell