Nikola Tesla Patents
Sob out ✓ Still another method, which was devised and described by me at a later date, is based upon my discovery that the atmospheric air, which behaves as an excellent insulator to currents generated by ordinary apparatus, becomes a conductor under the influence of currents or impulses of enormously high electromotive force which I have found means of generating. By such means air stæata, which are easily accessible, are rendered available for the production of many desired effects at distances, however great, which has heretofore been impossible, and this method furthermore allows advantage to be taken of many of those improvements which are practicable in the ordinary systems of transmission involving the use of a metallic conductor. Obviously, whatever method be employed, it is desirable that the disturbances produced by the transmitting apparatus should be as powerful as possible, and by the use of certain forms of high-frequency apparatus which I have devised and which are now well known, important practical advantages are in this respect secured. Furthermore, since in most cases the amount of energy conveyed to the distant circuit is but a minute fraction of the total energy emanating from the source, it is necessary for the attainment of the best results that, whatever the character of the receiver and the nature of the disturbances, as much as possible of the energy conveyed should be made available for the operation of the receiver, and, with this object in view, I have heretofore, among other means, employed a receiving circuit of high self-induction and very small resistance and of a period such as to vibrate in synchronism with the disturbances, whereby a number of separate impulses from the source were made to co-operate, thus magnifying the effect exerted upon, and insuring the action 5 415
