Electrical installations of electric light, power, traction and industrial electrical machinery (1902)
Kennedy, Rankin, d. 1917 · Edinburgh T.C. & E.C. Jack · leaf 87
Fig. 8i.—Siemens Brothers Moving Coil wire with the spring goes round a pulley and so turns the pointer.Fig. 8^ shows the Edison-Swan type of this instrument. Therange of readings on the dial can be doubled by a duplicate wirein a tube (Fig. 84) being connected in series with the voltmeter. … Fig. 82.—Cardews I lot-Wire Voltmeter It is used principally as a voltmeter, but might also be used as anammeter by coupling across a resistance in the current circuit, if itcan be made to work at very low voltages. The instrument isvery satisfactory for testing arc lamps and motors of all kinds;…
Electrical engineering · Electric power
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