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 #:
00066
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:
March 21, 2024
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48 RICHARDSON'S BLUEBOOK OF PROJECTION stat — A BCD etc., being either coils or grids. At X coil or grid, E is grounded to the frame at point Z. According to the explanation just given, it would be necessary to remove coils A B C D and E, whereupon the rest of the resistance elements would test clear. It is then only necessary to find the insulation flaw at Z, make the repair, and reassemble. If a battery or magneto is used, first disconnect the circuit wires and then touch the binding posts, one with each test wire. If the bell rings it shows the circuit n R « B. C o C X C H j it Figure 13 through the rheostat is complete. No wire or grid is broken or burned off. However, this does not prove there is nothing wrong. In a wire coil rheostat, two coils often sag together, eliminating some of the resistance but not breaking the circuit. This trouble may manifest itself by an overheating of the coils. If not, it can be located by careful examination. Insulating Rheostats It is best to set your rheostats on insulating, fireproof