Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 229
r electrical connectionwith both positive and negative brushes of the machine. This condition, however, gives rise to no perceptible in-convenience, andthis latter fact is ac-counted for by thejiowerful effect ofthe field-magnet he-lices in jire.^^ervingthe A-olume and di-rection of the cur-rent at… … lling-arinature.
Mechanical engineering
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