A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 126
may either connect theseparate coils in a closed-circuited armature, inwhich the coils are all connected with one an-other, or, in an open-circuited armature, in whichthe separate coils are independent of one another. Commutator, RuhmkorfiFs A name given by Ruhmkorff to a device placed on… … Fig. 160. Ruhmkorffs Commutator. Two metallic strips, V, V, supported on acylinder of insulating material, are in contact withthe battery terminals A, and D, through twovertical springs that bear on them. On a halfrotation of the cylinder by the thumb screw L, the strips V, V, change places as…
Electricity · Electrical engineering
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