Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 248
fthe current flowing in it is made use of to indicate the 246 Operating and Testing amount 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 beat 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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