Nikola Tesla - Free-Energy Devices

444 INVENTIONS OF NIKOLA TESLA.The arrangement shown in Fig.'2ti*2 is advantageous, as it diminishesthe sparking upon the commutator, the main circuit beingclosed through the auxiliary brushes at the moment of the breakof the circuit at the main brushes.FIG. 259.FIG. 261.FIG. 262. FIG. 263.The field helices may be wound in the same direction, or a partmay be wound in opposite directions.The connection between the helices and the auxiliary brush orbrushes may be made by a wire of small resistance, or a resistancemay be interposed (R, Fig. 263,) between the ./point and the