Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U.S. seacoast defenses (1902)
United States. War Dept, Anderson, George Lucius, 1849-1934 · Washington, Govt. Print. Off. · leaf 62
THE DYNAMO. 45 (d) The bars of the commutator (fig. 54), of H. D. copper insulated by amber-colored mica, are sufficient in number to keep the P. D. between any two adjacent,below 10 volts. (e) The bearings (fig. 55) are self-aligning, also self-oiling by means of revolv-ing rings on the shaft.… … • Cap 54. General Electric Commutator. v. Field unndings.—There are five methods of exciting the magnet whichin turn render magnetic the space or field in which the armature coils revolve:Permanent Magnets (fig. 60), Separately Excited (fig. 56), Series (fig. 57), Shunt(fig. 58), and Compound…
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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