. Practical wireless telegraphy; a complete text book for students of radio communication . to the coridenser andinductance as shown. At the moment oneof the electrodes on the disc comes be-tween the stationary electrodes, the sparkwill discharge and owing to the equalspacing of the spark points, the spark of a musical pitch. Experimentswith this gap indicate that the most ef-fective results are obtained (with 60 cyclecurrent) when the disc is driven at aspeed that will give from 200 to 300 sparkdischarges per second. The discs are fittedwith the correct number of spark elec-trod
. Practical wireless telegraphy; a complete text book for students of radio communication . to the coridenser andinductance as shown. At the moment oneof the electrodes on the disc comes be-tween the stationary electrodes, the sparkwill discharge and owing to the equalspacing of the spark points, the spark of a musical pitch. Experimentswith this gap indicate that the most ef-fective results are obtained (with 60 cyclecurrent) when the disc is driven at aspeed that will give from 200 to 300 sparkdischarges per second. The discs are fittedwith the correct number of spark elec-trodes to give a spark of this frequencywhen driven by a motor at speeds varyingfrom 1,800 to 2,400 revolutions per modified type of the non-synchron-ous gap is shown in Fig. 114 where tenstationary sparking points are mounted ontwo brass sectors. A light contact arm,A, B, carrying two spark discharge points is attached to the shaft of a high speed „.,,.. ^. -, , „ ~, , , r J • ■ I^S- 114—Another Type of Non-synchronous motor. The advantage of this design is Fig. 113—Non-synchronous Rotary Discharger. ROTOR CNSTATIONAIW^ ELECTRODES
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
