Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 369
s may both be mounted on thesame armature shaft, when the machine will give either adirect or alternating current, or both, at the same time to two 350 PRACTICAL ELECTRICITY. independent circuits. The dynamo would then be called adouble current generator. The collector rings would be con-nected one… … Fig. 329.—Multi-Coil Siemens Drum Armature.Tooth-core pattern. wound upon a cylindrical laminated iron core made by as-sembling, upon the armature shaft, thin sheets of soft iron ;after being properly insulated the coils are wound upon thecore, and connected in series and to the commutator in the…
Electricity · Magnetism
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