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

Page scan 000693 from F. H. Richardson's bluebook of projection

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 #:
000693
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:
August 01, 2024
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DEFINITIONS 675 German Silver Wire A wire of metallic alloy much used for purposes of resistance. It is composed of copper, zinc and nickel in varying proportions, according to the amount of resistance desired. Graphite One of three forms in which carbon occurs in nature. Soft graphite is a most excellent lubricant where high temperatures exist. Grid As applied to resistance, one of the resistance elements of a certain type of rheostat. As applied to sound apparatus, the element located between filament and plate in vacuum tubes. Grid Leak A very high, non-inductive resistance frequently connected in the grid circuit of a 3-element vacuum tube. Ground A term employed to designate an unintended connection between polarities, the same having too high resistance to constitute a short circuit. A connection of one or both polarities with earth. An electric contact of one polarity with some substance not ordinarily considered as a conductor, which is sometimes made to serve as one side of a circuit. Ground Noise Unintended noise in sound reproduction and projection. May be due to many causes. Ground Wire A wire connecting one wire of an electric circuit with earth. A wire connecting some part of an electric equipment not supposed to be charged, with earth.