Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 562
Fig. 342. … Fig. 343. contact with the south pole S of the compound magnet system,and when depressed, the lower edge u uin like manner comes incontact with the north pole N. The play of the lever or handleH is limited by adjustable screws fixed in the frame A. The 542 THE ELECTKIC LIGHT. normal position of the…
Electrical engineering
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