A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 522
changer,is shown at T, with its operating key K andlocal battery e. This instrument interchangesthe poles of the main battery E, wnen K, is de-pressed, and thus reverses the polarity of currenton the line. The increment transmitter T2, is connected tothe battery wire 12 of T, in such a way thatwhen… … Fig. S3 J- Quadruplex Telegraphy, Bridge Method. Two receiving instruments R and R2, ateplaced at the distant end of the line. R, is apolarized relay whose armature is deflected inone direction by positive currents, and in theopposite direction by negative currents, independ-ently of their…
Electricity · Electrical engineering
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