Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 173
. When the key is released the twoplates of the condenser discharge through the resistanceand neutralization results. Fig. 136. \n both the circuits tlu^ condifions and re-sults are as in the previous example : the initial imijulses i62 ELEMENTAE Y TELEGEAPR Y from the condensers passing to the… … Fio. 137.—CoDflenser cliarge and cliscliarge—III. ning + impulses from earth and comjDensation circiiit passto the battery through the polarized sounder or relay coils,producing equal and opposite effects. When key is releasedthe condenser neutralizes through B and the line charge(the sending end…
Telegraph
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