. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. ds from the machine feeding it, and kept at a height of 15 ft. Table I.—Eakly Experiments with Gramme Machines. No. ofRevolutions. 820820820820820870870870870870920920920920920 Distance of Observer from Lamp. Candle-powerLight. feet13567J8015 13567^3015Vi 1356713015 24613600412048004896320044006480880090403616563296561136211520 Remarks. The current was too feeble to main-tain the carbons \ in. apart. Distance apart \ in. regularly,ing satisfactorily. Work- Too high tension. The carbons heatfor considerable
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. ds from the machine feeding it, and kept at a height of 15 ft. Table I.—Eakly Experiments with Gramme Machines. No. ofRevolutions. 820820820820820870870870870870920920920920920 Distance of Observer from Lamp. Candle-powerLight. feet13567J8015 13567^3015Vi 1356713015 24613600412048004896320044006480880090403616563296561136211520 Remarks. The current was too feeble to main-tain the carbons \ in. apart. Distance apart \ in. regularly,ing satisfactorily. Work- Too high tension. The carbons heatfor considerable length. The ligiitunsteady. 2 I 2 484 DYNAMO-ELECTEIC AND MAGNETO-ELECTEIC MACHINES. The electric current is produced in Siemens dynamo-electric machine, Figs. 1053 and 1054, by therotation of an insulated conductor of copper wire or armature coiled in several lengths, say 8, 12,16up to 28, and in several layers, longitudinally, upon a cylinder with a stationary iron core nn^ s Sj,so that the whole surface of the armature is covered with longitudinal wires and closed at both 1TMKF This revolving armature is enclosed to the extent of two-thirds of its cylindrical surface by curvedsoft-iron bars. The curved bars are the prolongations of the cores of the electro-magnets E. The coils ofthe electro-magnet form, with the wires of the revolving armature, one continuous electric circuit,and when the armature is caused to rotate, an electric current, at first very feeble, is induced, by 1054.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
