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 448
er plate , t , similar to those in Figs . 236 and 237 , with the burners h for the gas beneath the same ; but the armature is pivoted at one end to one pole of the magnet and the other end swings toward and from the other pole of the magnet . The spring w acts against a lever arm that projects from… … Fig . 240 . Fig . 241 . Fig . 239 is similar to Fig . 238 , except that the keeper t is not made use of and the armature itself swings into and out of the range of the intense action of the heat from the burner n . Fig . 240 is a diagram similar to Fig . 231 , except that in place of using a spring…
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