St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 108
Fig. 146. EI<ECTRICITY GENERATED BY DYNAMOS. 105 Fig. 141 shows the ends of a coil joined to two rings, X,Y, insulated from each other, and rotating with the coil.The two stationary pieces of carbon. A, B, called brushes,press against the rings, and to these are joined wires,which complete the… … Fig. 147. form a colleBor, and this arrangement gives an alternatingciwrent. In Fig. 142 the ends of the coil are joined to the twohalves of a cylinder. These halves, X and Y, are insu-lated from each other, and from the axis. The currentflows from X onto the brush A, through some externalcircuit,…
Electricity
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