Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 363
move uppast the N-pole, either terminal of the coil being connected with one brush for one-half revolution andwith the other brushfor the other half ofthe revolution. Witha two-part commuta-tor, the current in theexternal circuit is in-terrupted twice in eachrevolution. A singlecoil armature of… … Fig. 317.—Simple Direct Current Dynamo. Direction of current in the coil at one-half revolution from the position in Fig. 316. Brush M is positive as before. Exp. 92: Make thesame connections for thestudents experimental 91, page 339. Adjust the brushes so that & &* EXP* d7an)eUoCony…
Electricity · Magnetism
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