Nikola Tesla - Free-Energy Devices

HIGH FREQUENCY AND HIGH POTENTIAL CURRENTS. 329insert an iron core * within the coil.The current being one ofvery high frequency, will, if it be of some strength, soon bring theiron core to a noticeably higher temperature, as the hysteresis andcurrent losses are great witli such high frequencies. One mighttake a core of some size, laminated or not, it would matter little ;but ordinary iron wire -^th or th of an inch thick is suitablefor the purpose. While the induction coil is working, a currenttraverses the inserted coil and only a few moments are sufficientto bring the iron wire i to an elevated temperature sufficient tosoften the sealing-wax s,and cause a paper washer p fastened byit to the iron wire to fall off. But with the apparatus such as Ihave here, other, much more interesting, demonstrations of thiskind can be made. I have a secondary s, Fig 176, of coarse wire,wound upon a coil similar to the first. In the preceding experimentthe current through the coil c, Fig. 175, was very small, butthere being many turns a strong heating effect was, nevertheless,FIG. 176.produced in the iron wire. Had I passed that current through aconductor in order to show the heating of the latter, the currentmight have been too small to produce the effect desired. But withthis coil provided with a secondary winding, I can now transformthe feeble current of high tension which passes through the primaryP into a strong secondary current of low tension, and thiscurrent will quite certainly do what I expect. In a small glasstube (t, Fig. 176), I have enclosed a coiled platinum wire, w, thismerely in order to protect the wire. On each end of the glasstube is sealed a terminal of stout wire to which one of the ends ofthe platinum wire w,is connected. I jointhe terminals of thesecondary coil to these terminals and insert the primary p,between the insulated plate r l5and the terminal TJ, of the inductioncoil as before. The latter being set to work, instantly theplatinum wire w is rendered incandescent and can be fused, evenif it be verv thick.