Motion picture handbook; a guide for managers and operators of motion picture theatres ([c1916])

Page scan 000373 from Motion picture handbook; a guide for managers and operators of motion picture theatres

Record Details:

Title:
Motion picture handbook; a guide for managers and operators of motion picture theatres
Date:
[c1916]
Publisher:
New York City, The Moving Picture World
Volume:
Motion picture handbook; a guide for managers and operators of motion picture theatres
Leaf #:
000373
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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354 MOTION PICTURE HANDBOOK Fig. 165 is a diagram of connections for the A. C. compensarc. The primary or line wires should be fused to about half the maximum current at the lamp. This would ordinarily require about a 30-ampere fuse. Note. — This diagram supplied by the manufacturer. The author does not agree with omitting fuses from the secondary circuit. See Fig. 163. Figure 165. This device is adjustable in three steps, which steps have been found to meet the general service conditions. When the switch on the compensarc is open no current flows through the lamp, but the operator should not handle his carbons without opening the operating switch on the projection machine, because if the outside lines have a ground and the operating room is grounded the operator can receive a shock of full-line potential. When through with the show open the primary line switch. Fig. 166 shows the slate top of the A. C. compensarc and the switch blade. Throwing the switch blade in contact with the first clip of the switch (Fig. 166) gives an adjustment so that with the carbons separated about three-sixteenth of an inch the current flowing through the projection lamp Figure 166.