The inventions, researches and writings of Nikola Tesla : with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas C, Tesla, Nikola · The Electrical Engineer · leaf 231
e , with planed grooves g g ( Fig . 136 ) to fit the middle portion of the pieces o c , serve to clamp the latter and hold them firmly in position by means of two bolts c c ( of which only one is shown ) passing through the ends of the strips . In the use of this kind of discharger I have found… … Fig . 136 . of working with a smaller length of air gap , and that means smaller loss and less deterioration of the metal ; secondly , by reason of splitting the arc up into smaller arcs , the polished surfaces are made to last , much longer ; and , thirdly , the appa -
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