. A-B-C of electricity. Fig. 20 amount of wire, which depends upon theuse the dynamo is to be made for. Thus,you will see, there will be on each core twoloose ends of the wire that is wound aroundit—namely, the beginning of the wire andthe end where we leave off winding, whichon the two cores together will make four endsof wire. We will tell you presently what isdone with them. After the cores are wound, they are screwedfirmly to the yoke and to the pole pieces, soas to make, for all practical purposes, one 64 ELECTRIC LIGHT whole piece pretty nearly the shape of ahorseshoe magnet. Now, to mak
. A-B-C of electricity. Fig. 20 amount of wire, which depends upon theuse the dynamo is to be made for. Thus,you will see, there will be on each core twoloose ends of the wire that is wound aroundit—namely, the beginning of the wire andthe end where we leave off winding, whichon the two cores together will make four endsof wire. We will tell you presently what isdone with them. After the cores are wound, they are screwedfirmly to the yoke and to the pole pieces, soas to make, for all practical purposes, one 64 ELECTRIC LIGHT whole piece pretty nearly the shape of ahorseshoe magnet. Now, to make the dynamo complete, wemust put in the armature between the poles,which are rounded off, as you will see, toaccommodate it. The armature is held up. Fig. 21 by two bearings, which you will see inthe sketch of the complete dynamo above.(Fig. 21.) A-B-C OF ELECTRICITY The armature in a practical dynamo-ma-chine consists of a large spool made of thinsheets of iron firmly fastened together andhaving a steel shaft run through the center,upon which it revolves. This spool, or armature, is wound with anumber of strands of copper wire. The com-mutator, instead of consisting of two bars,is made in many dynamos with as many barsas there are strands of wire, and the ends ofthese wires are fastened to the bars of thecommutator so as to make, practically, onelong piece of wire, just as we showed you inexplaining how the electricity was produced. The brushes, resting upon the commutator,carry away the electricity from it into thewires with which they are connected. Now we have our dynamo all put togetherand ready to start as soon as we properlyconnect these four loose ends of wire on thecores. If you will turn back to Fig. 20 you willsee that t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1915
