St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 154
Fig. 232. … Fig. 233. the current to enter first one commutator bar and thenthe opposite one as the armature revolves. The regular 152 THE ELECTRIC MOTOR, AND HOW IT WORKS. armatures have many coils and many commutator bars,as will be seen by examining the illustrations shown.The ordinary galvanometer may be…
Electricity
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