A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 520
inedis not, however, sufficiently great to balance theincreased expense of construction. Single-needleinstruments, therefore, are preferred to thosewith two needles. Telegraphy, Duplex, Bridge Method of A system whereby two telegraphic messages can be simultaneously transmittedover a single wire in… … Fig. 328. Duplex Telegraphy, Bridge, Method. When the ends of this cross wire are at thesame potential, whicn will occur when the resist-ances in the four arms are proportionately equal,no current passes. The battery is connected through the trans-mitter K, which is arranged so that the…
Electricity · Electrical engineering
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