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 #:
000303
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 from the top of the projector downward. It passes the upper sprocket, a toothed wheel, the teeth of which engage the perforations at the sides of the film. The film is held in engagement with the sprocket teeth by the Figure 125 sprocket idler — the smaller wheel shown in contact with the lower left-hand side of the sprocket. To the left of the upper sprocket there is a loose loop in the film, after which the celluloid passes through the "gate" and "aperture". There its edges are held under carefully adjusted tension by polished metal plates, between which the moving film slides. (12) Light comes from the left of Fig. 125, chines through the film, and into the projection lens, the white casing of which is seen just right of the gate. Below the gate the film perforations are engaged by the teeth of the intermittent sprocket, against which they are held by the intermittent idler, shown directly below the intermittent sprocket. Sometimes the place of the intermittent idler is taken by an intermittent "shoe." There is