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 137
l. The iron coil is usuallyso shaped B8 to afford a closed magneticcircuit A converter or transformerchoking coil as long as its secondary isLeft Open. In alternating current work special choking coils are used. Thus for theatrical work, a choking coil with amovable iron core is used to change… … Fig. 97. Differential CoilAM) PlUNI
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