International Library of Technology · Scranton, International Textbook Co. · leaf 60
e lead forwards.Fig. 18 refers to a four-poleP°- ^9- machine with four brushes. The proper position for the brushes in this particular case isthat shown in the diagram. A is on top, B to the right,C on the bottom, D to the left. If the rocker-arm be given aquarter turn to the right or left, so…
Electrical engineering
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