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

Page scan 000134 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 #:
000134
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
Date Added:
May 02, 2025
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118 RICHARDSON'S BLUEBOOK OF PROJECTION amperes to projection arc lamps. The smallest, seen at the lower left, is the activating element of the kind of rectifier often used with test meters, such as decibel Figure 55 meters. Its current-carrying capacity is limited to a few milliamperes. (18) Stack rectifiers are usually connected in a "bridge" circuit as diagrammed in Fig. 56, where each arrowhead-and-crossline symbol represents either one complete stack assembly (Fig. 55) or one section of such an assembly. The electrical arrangement is most easily understood by reference to Fig. 57. The arrowheads in TO ARC UNE ( \ 1 , 3 ' /\l + „ TOA.C * LINE **\/ H Figure 56 that diagram do not represent direction of electron motion but direction of current flow according to the conventional idea of current moving from positive to negative. The circuit may be traced accordingly. When the upper a.c. wire is positive, trace through the upper right-hand