. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. the movable cores to the pen ; O O are springs toenable the pen to resist the pull of the magnets, theconnections are shown in O, O^, O^, the latter beingattached to a fixed post O^. As the currents sent through the line wire bythe sending instrument vary in strength, and causethe light bar of soft iron to move with varyingpower by its attraction to the stationary magnets;and in order to cause it to take its proper positionaccording to each vibration in power, a varying resist-ance is opposed to it, such a
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. the movable cores to the pen ; O O are springs toenable the pen to resist the pull of the magnets, theconnections are shown in O, O^, O^, the latter beingattached to a fixed post O^. As the currents sent through the line wire bythe sending instrument vary in strength, and causethe light bar of soft iron to move with varyingpower by its attraction to the stationary magnets;and in order to cause it to take its proper positionaccording to each vibration in power, a varying resist-ance is opposed to it, such as a spring which requires in-creased power to compress it the more it is compressed,so that the action of the soft iron bar, combined withthat of a precisely similar bar actuated by the secondline wire, will cause the position of the pen in the re-ceiving instrument to follow the position of the penin the hand of the operator at the sending instru-ment, and thus form the letters. The total strengthof the spring or varying resistance can be regulated iieo. at will, so that the letters
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
