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

Page scan 000327 from F. H. Richardson's bluebook of projection

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 #:
000327
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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THE PROJECTOR 311 tures, as a consequence of which the film buckled, and sometimes the projector mechanism frame was warped out of shape. Later this type of shutter was replaced by the superior rear shutter now in very general use. It is located between the light source and the film, and since it cuts of! a little more than 50 percent of the light (74), it cuts off an equal amount of heat from both the him and the mechanism. This shutter is available in two radically different types, each of which will be considered separately. The Disc Type Rear Shutter This type is, in effect, the old in-front-of-the-lens Fig. 138. — Simplex disc type rear shutter. shutter somewhat enlarged in diameter and relocated just back of the projector aperture, (75) approximately hve inches away. At this distance it must, with some types of beam converging element (lens or mirror), cut