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

Page scan 000112 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 #:
000112
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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96 RICHARDSON'S BIAJIIBOOK 01' PROJECTION that the electrons are emitted from either side of the cathode in two concentrated beams, which same are directed toward appropriate recesses formed in the anode structure. This concentration of moving negative charges entering the recesses acts like a suppressor grid in inhibiting secondary emission and permitting the tube to pass a comparatively enormous current. Pluh B Fig. 43. — A is a diagram of electrode arrangement of screen-grid tetrode. B is an old-style triode showing electrode arrangement. Fine ^ mesh is the anode ; wire spiral is grid ; white cylinder is cathode which is heated by hairpin-shaped filament buried inside it under an insulating layer. C is diagram of electrode arrangement of pentode. (100) The structural detail of some common commercial types of tubes is illustrated in Figs. 43 A, 43 B and 43 C. The circuits in which they operate, and the results they produce, will be described in detail hereafter. Other tube types will be described in connection with the apparatus in which they function. (101) Metal tubes differ from others only in that the surrounding envelope is metal instead of glass. Since