F. H. Richardson's bluebook of projection (1942)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1942
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000308
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:
July 11, 2024
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292 RICHARDSON'S BLUEBOOK OF PROJECTION aperture. The projection aperture cannot be seen when the gate is closed, but the framing aperture can, being above the gate; thus the projectionist can assure himself that he has threaded his film in frame without having to open the gate to see. Shutters (22) Fig. 128 is another view of the Brenkert mechanism, partly disassembled to show the two shutters. These shutters move in opposite directions, cutting off the light beam from both top and bottom. The aperture Figure 128 is beyond the rectangular opening seen right of the shutters and in line with the thick black tube of the projection lens holder. The small lamp bulb casts light through the framing aperture. Other types of shutters are illustrated and described further on. Strippers (23) Film is not pictured as threaded to the upper sprocket in Fig. 128. What appears to be film is a stripper. A stripper rests on the hub of the sprocket, where it does not interfere with the film. But when film tears, it