Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 247
istance in the circuit for the magnetic induction. To avoid this, therefore, the conductors 228 DYXAMO-ELECTRIC MACHINES. are buried in grooves or holes (Fig. 74). The distance between the poles and the core is thuslimited to the small gap required for the safe revolving of the armature. The… … Fig. 74.—Multipolar armature. A test made by Dr. Louis Duncan, Dr. G. A. Tjiebig. and ]\Ir. W. F. Hasson, of .JohnsHopkins University, on a 400-amj)cre 110-volt dynamo of this type, gave the following results.The machine was built for 400 revolutions per min., and weighed 7,100 lbs. : in the test…
Mechanical engineering
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