F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000685
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
June 04, 2024
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DEFINITIONS 667 Axis, Optical A straight line passing through the exact center of a lens, or of all elements of an optical system. "B" Battery A battery of comparatively high voltage used for supplying E.M.F. to the plate circuit of a vacuum tube. Back Focus Distance from film to the surface of the first element of a projection lens when the picture is in sharp focus on the screen and the light source a sufficient distance from the film to illuminate it with parallel rays of light. See "Working Distance." Backlash Lost motion. In projection applied particularly to lost motion in the projector rotating shutter. Balsam, Canadian A transparent balsam used in cementing elements of projection lens together. Balanced Load As applies to the Edison 3-wire system, an equal load between neutral and true positive and neutral and true negative. Beam of Light A bundle of light rays. A shaft of light having well defined outlines Blooping Patch A black overlay on sound track at the splices to prevent noise the splice would cause when projected were it not thus treated. Blozving Point Term applied to designate number of amperes of current required to melt a fuse.