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

Page scan 000364 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 #:
000364
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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346 RICHARDSON'S BLUEBOOK OF PROJECTION FOR OLD TYPE D.C. ARCS 25 to 50 amperes, ^" cored positive, 5/16" orotip negative. 50 to 65 amperes, 24" cored positive, 11/32" orotip negative. 65 to 70 amperes, y%" cored positive, 11/32" orotip negative. 70 to 85 amperes, %" cored positive, }£" orotip negative. 85 to 120 amperes, 1" cored positive, 7.16" orotip negative. 120 to 140 amperes, \Vk" cored positive, Yz" orotip negative. FOR OLD STYLE A.C. ARC The following White Flame carbons are recommended, in all cases both positive and negative being of the same diameter : \ 25 to 40 amperes, arc voltage 25 to 28, l/2" carbons. 40 to 60 amperes, arc voltage 28 to 32, ^" carbons. 60 to 75 amperes, arc voltage 32 to 35, %" carbons^ 75 to 100 amperes, arc voltage 35 to 40, %" carbons. /V. /