Nikola Tesla U.S. Patent 645,576 - System of Transmission of Electrical Energy Patent Wrapper Page 6

124 ? 7 12 20 The invention which forms the subject of the present application comprises a novel method or system for the transmission of electrical energy without the employment of metallic line conductors, and is primarily designed for use in cases where large amounts of electrical energy are to be transmitted to considerable distances, but the results arrived at are of such character and magni1 1 tude, as compared with any he retofore secured, as to render indispensable the employment of means and the utilization of effects essentially different in their characteristics and actions from those before used or investigated. "To be more explicit, the transmission of electrical energy, which forms a part of my present invention, demands for the attainment of practically useful results, the production and conversion of excessively high electrical pressures. Here to fore, it has been possible, by of the ap paratus at command, to produce only moderate effective electrical pressures, and even these not without some risks and difficulties, but I have devised means whereby I am enabled to generate with safety and ease electrical pressures measured by hundreds of thousands, and even millions, of volts, and in pursuing investigations with such apparatus I have discovered certain highly important and useful facts which render practicable the method of transmission of electrical energy means hereinafter described. Among these, and bearing directly upon the invention, are the following: First; that with electrical pres-2