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 #:
000526
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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508 RICHARDSON'S BLUEBOOK OF PROJECTION charge, exercises a repulsive force upon other negatrons that are just inside the surface of the filament, and would be emitted if this surrounding space charge did not repel them. But the positive mercury ions are attracted toward the space charge, which of course is negative, and unite with the negatrons. The mercury ions then become neutral mercury atoms again until they are re-ionized by a new collision, and the space charge has been destroyed. Therefore the effect of mercury vapor in a rectifying tube is to make possible much greater emission than could possibly take place in a vacuum rectifier of the same size, with the result that a small mercury-vapor tube can, as before said, rectify as much current as a large vacuum tube. ''Dry Chemical Stack"-or "Disc^-Rectifiers Tubes of either vacuum or mercury-vapor type can be omitted entirely, and the same work be performed by rectifying "stacks" or discs. Some circuit changes, however, would be needed if stacks were substituted for the tubes in Figure 115. The nature, operation and circuits of disc rectifiers are described on Paee 287.