St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 109
it still enters the outside circuit io6 ELECTRICITY GENERATED BY DYNAMOS. through A, because Y is then in contadl with A. Thisdevice is called a cormmdator, and it allows a constant ordirect current to leave the machine. In regular machines, the field-magnets are eledtromag-nets, the whole or a… … Fig. 148. the S pole of the field-magnets, the armature coils arewound on an iron core; this greatly increases the strengthof the field, as the lines of force have to jump across buttwo small air-gaps. There are many loops of wire onregular armatures, and man) segments to the commuta-tor, carefully…
Electricity
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