Electric transmission of energy and its transformation, subdivision, and distribution. A practical handbook (1894)
Kapp, Gisbert, 1852-1922 · New York, Van Nostrand · leaf 440
is the usual practice. The bottom pole pieceis cast in one with the bed-plate and bearings. Thearmature is of the ring type, and very carefully insulated,so that the use of these machines becomes possible up to3,000 volts, and even more. For alternating current work Mr. Brown has adoptedthe type of…
Electric power production
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