s pro- length) are twisted together to cause the coil to retain BY GEO. M. HOPKINS, It is generally understood that an efficient electric longed to form the commutator, and the terminals, its shape. After the completion of the first section, motor cannot be made without the use of machinery one of… … core seven-sixteenths inch thick, of the form shown. (Fig. 2), should be made of sufficient size to receive the Fig. 3—WINDING THE ARMATURE. The motor illustrated has 15 layers of iron in the mag- soft iron wire of which the core of the armature is formed. The wire, before winding, should be…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-479-300.webp)
