Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 40
t doubled, then the closed end is placed on thebobbin and the wire wound double about the bobbin. By this method anyelectromagnetic action in one wire is neutralized by an equivalent actionin the other, and there is no inductive effect when the circuit is openedor closed. The Post-office bridge,… … Fig. 19. 28 SYMBOLS, UNITS, INSTRUMENTS.
Electrical engineering
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