Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 252
he current flowing in it is made use of to indicate the 246 Operating and Testing amoimt of current flow in the so-called ^^hot wireinstruments. A wire of some length is rigidly fastened at oneend, the other end being attached to a spring. Apointer is attached to the wire at the point where itand… … Figure 151 sarily the resistance of the instrument is quite low.Instruments of this kind are dead beaf and are un-affected by external fields. They can be used oneither direct or alternating current. Practically all measuring instruments in use at thepresent time operate on the principle previously…
Electrical engineering · Electric testing
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