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 #:
00050
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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32 RICHARDSON'S BLUEBOOK OF PROJECTION Calculating Resistance Requirement, page 46 57. How may the resistance in ohms required to pass a desired amperage be calculated, the supply voltage being known? Overload, page 46 / ; 58. What will be the result of overloading resistance elements? 59. What happens if there is too much overload ? 60. At what maximum temperature, by Fahrenheit scale, should resistance be permitted to operate? 61. How may projectionists judge, roughly, when maximum permissible temperature has been reached? 62. Is operation of rheostats below capacity true economy? Testing for Ground, page 47 63. Describe method of testing for grounded coil or grid. Ballast Resistance, page 49 64. 65. 66. 67. 68. 69. 70. Why is ballast resistance necessary ? What is meant by the "negative temperature characteristic" ? What would happen if an arc were connected directly across a constant voltage circuit without either ballast resistance or transformer impedance in series with it?^< t To what is the voltage drop across resistance or impedance equal ? Does the voltage absorbed by resistance or impedance increase with increase in current flow or vice versa? In what manner is the action of an arc stabilized by ballast resistance or impedance? What happens as the arc length increases? . ./ 9