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 #:
00078
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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60 RICHARDSON'S BLVEBOOK OF PROJECTION 60. Where should emergency switches never be located? 61. What precautions should be taken to prevent the possibility of opening of the emergency light control switch at the wrong time ? 62. What should be done before installing a single-pole switch ? 63. Does the National Electric Code require that all switches^ be marked with specified dimensions ? 64. May a switch be used for a higher voltage or amperage than its rating 1 sruOr 65. Should all circuit switches and fuses be inclosed in cabinets ? Switchboards, page 80 ./. 66. What are the flat copper bars on switchboards called? 67. How are connections between bus bars located? J Fuses, page 81 68. Do electric conductors carry fixed amperage? -/> 69. What may cause a rise in voltage, with consequent rise in amperage, thus endangering a circuit and its attached equip ^ ment unless protection is afforded by fuses? -tyiv^r 70. What is a "fuse"? K-^M 71. Are fuses installed in both wires of an electric circuit? 72. In what manner do fuses protect a circuit? <**^* 73. When a fuse "blows" (melts), what must be done before a new fuse is installed?. . , 74. With current overload why does fuse temperature rise more rapidly than that of the circuit wires?-/ 75. What various kinds and types of fuse may be installed in theatres? ,. -* 76. Where and under what circumstances are link fuses permissible in theatres ? 77. Describe the general construction of cartridge fuse elements. 78. Describe the plug fuse and its connections. 79. What is a "link" fuse? 80. What is meant by "boosting" a fuse? 81 . What is the practical effect of boosting fuses ? Fusing Projection Room Circuits, page 87 82. What exception to fusing rules in general applies to projection light source circuits?