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 317
are unnecessary as there is no winding onthe revolving element. Figure 185 shows a view of the Guttman wattmeterwith the dials and magnets removed. The aluminum Recording Wattmeters 315 armature which is slotted in spiral lines weighs about% of an ounce and rests on a jewel bearing. At thetop of… … Figure 185 coils are wound with heavy wire and consume fromtwo to four watts, depending on the size of the meter.The shunt coil of the meter is wound upon a lami-nated iron core having two air gaps, through one ofwhich the disk rotates. On the lower part of thislaminated core a heavy band of copper…
Electrical engineering · Electric testing
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