Nikola Tesla Patents
J 3 pulses. The potential of these impulses may be raised by a secondary T, which consti tutes the source of current for the working circuit, or that containing the devices R for utilizing the current. ED By means of this apparatus effects of a novel and useful character are obtaineble, but to still further increase the efficiency of the discharge or working current, 1 have in some instances provided a means for further breaking up the individual sparks themselves. A device for this purpose is shown in Figures 4 and 5. The box or case F in these figures is fixedly secured to the frame or bearing of the generator or motor which rotates the circuit controller in synchronism with the alternating source. Within said box is a disk D fixed to the shaft C with projections d' extending from its edge parallel with the axis of the shaft. A similar disk D" on a spindle à, in face of the first is mounted in a bearing in the end of the box F with a capability of rotary adjustment. The ends of the projections d' are deeply serrated or several pins or narrow projections placed side by side, as shown in Fig. 4, so that as those of the opposite disks pass each other a rapid succession of sparks will pass from the projections of one disk to those of the other. What I claim as my invention is Q 1. The combination with a source of current, of a condenser adapted to be charged thereby, a circuit into which the condenser discharges in a series of rapid im-5117
