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 265
d in consequence of the heating by the brushes which are apt to form in the upper part of the tube , near the ex hausted globe , especially if the vacuum be excellent , and therefore the potential necessary to operate the lamp be very high . Fig . 151 illustrates a similar arrangement , with a… … Fig . 149 . Fig . 150 . condenser coatings c o . The insulating packing p should in this construction be tightly fitting to the glass , and rather wide , or otherwise the discharge might avoid passing through the wire w , which connects the inside condenser coating to the incandes cent button m .…
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