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 64
with this kind ofregulation as some of the coils are nearly always onshort circuit. This applies also to a great extent tomachines regulated by field commutation. Machinesof this type are in consequence usually equipped withsome special form of commutator calculated to with-stand the destructive… … VWWWVWWF Figure 41 ing wires of opposite polarity do not cross each otheras they do in drum armatures. Two special types of d\Tiamos very generally usedfor series arc lighting are the Brush and Thomson-Houston. Figure 42 shows the coils and commutator sectionsof an 8 coil Brush arc dynamo. The…
Electrical engineering · Electric testing
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