. Practical wireless telegraphy; a complete text book for students of radio communication . 0 MAGNETICAMWItTtR Fig. 55—Aerial Ammeter with Thermo-Couple. to saturate the iron core with lines of force than to empty itcurrent is shown in Fig. 58. Fig. 56—Production of Thermo-Electric Current. may be as great as 150,000 volts whenthe pressure of the current through P is20 to 30 volts. The student should note that, al-though the interrupted direct current inwinding P induces an alternating currentin the winding S, the induced pressure(in winding S) is considerably more in-tense at the break of the

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. Practical wireless telegraphy; a complete text book for students of radio communication . 0 MAGNETICAMWItTtR Fig. 55—Aerial Ammeter with Thermo-Couple. to saturate the iron core with lines of force than to empty itcurrent is shown in Fig. 58. Fig. 56—Production of Thermo-Electric Current. may be as great as 150,000 volts whenthe pressure of the current through P is20 to 30 volts. The student should note that, al-though the interrupted direct current inwinding P induces an alternating currentin the winding S, the induced pressure(in winding S) is considerably more in-tense at the break of the primary cur-rent than at the make. This is dueto the more rapid change of flux thread-ing through the winding S when the linesof force collapse than when they rise; inother words, it requires a longer periodThe wave form of the induced 5-1 iifmifwiJ C I. mill Fig. 57—Fundamental Diagram of Induction Coil. 48 PRACTICAL WIRELESS TELEGRAPHY. 3a

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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917