The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 321
the poles TV 6, 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 ai the armature core is in contact with the southpole 6 of the permanent magnet, and the end D D… … 3i6 STANDARD ELECTRICAIv 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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