A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 387
—(See Electrode, Nee-dle^ Needle, Elongation of A phrase sometimes used for the angular deflection ofa needle. Needle, Magnetic A straight bar-shaped needle of magnetized steel, poisednear or above its centre of gravity, and freeto move either in a horizontal plane only, orin a vertical plane only,… … Fig. 40 j. Magnetic Needle. in the mariners compass. This form of magneticneedle is the one most commonly employed. For use as a mariners compass the needle issupported on gimbals and placed in a box pro-vided with a card on which are marked thepoints of the compass. (See Compass, Azimuth.Compass,…
Electricity · Electrical engineering
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