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 #:
000288
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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270 RICHARDSON'S BLUEBOOK OF PROJECTION 50. What purpose does the lead washer serve? 51. How is pressure between copper and lead secured and retained? , • 52. Is the exact amount of pressure important? 53. Of what does the commercial form of copper-oxide rectifier consist? 54. Do copper-oxide rectifiers require replacement of parts or demand attention? ' 7*** 55. Is the proper operation of the ventilating fan important? What protection is there against the failure of the fan? Uv*u 56. How does the efficiency of these rectifiers compare with \ that of other current rectifiers? 57. What other substances beside copper-oxide are available for rectifying purposes? sm*^ 58. Are rectifiers available for all phases of a.c. ? 59. Where should copper-oxide rectifiers be located ? 60. Is it practical to overload them ? .-^kv*)"". Motor Generator Sets, page 295 61. What is a ' 'brush"? Has it many varieties and what pur t pose does it serve? >*^t . .."yy^^yfJ^ t ^A 62. What is meant by "brush loss"? How does it occur? 63. What is meant by "brush pressure" ? 64. What should be the limits of brush pressure ? sjL+**Jr*&& $fl 65. What difficulty does too much or too little bruslupressure cause? 66. How may brush pressure be measured? 67. What is the brush rocker or yoke? How should it be^et? 68. What is a compoundwound generator or motor? 69. What is the effect of compound winding of motor held magnets? 70. What is a commutator and what is its function ? 71. What condition is indicated by a commutator "flat"? 72. What is a commutator "lug" and what is its purpose: 73. What is meant by a parallel connection of dynamos or alternators ? 74. What is polyphase current ? How is it produced ? 75. What is the amperage and voltage of dynamos connected in series? 'WjmJBM 76. What is the effect of a series wound dynamo?