The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 321
nthe poles N S, of a powerful compound horseshoe magnet, G G.It is wound with fine wire and a key handle H is provided forworking it. In its normal position the handle is drawn upward,and the end s s of the armature core is in contact with the southpole .S of the permanent magnet, and the end n 71… … 316 STANDARD ELECTRICAL DICTIONARY. the north pole. This suddenly reverses the polarity of the arma-ture and sends a momentary current through the armature coilwhich is in circuit with the line. The cut only shows the principleof the key, whose construction is quite complicated. Key, Make and…
Electricity
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