Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 97
ving circuit. This is exemplified in Figs. 68 and 75,The oscillograpli. — In order that a galvanometer needle mayindicate the successive instantaneous values of a rapidly changingcurrent, such as an alternating current, the galvanometer needlemust be extremely light and the period of free vibration… … Fig. 67. very close together between the poles NS of a strong magnet.A very light mirror M is attached to the wires, and the currentto be measured flows down one wire across the connection c andup the other wire, so that one wire is pushed forwards and theother wire is pushed backwards by the…
Dynamos · Electric motors
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