Nikola Tesla Patents
CCC) C art Geslac atteberg rents 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 strata, 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 improvecents 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 Furthermore, since in most cases the Call in this respect secured. • Selt. Sphee am дел amount of energy conveyed to the distant circuit is but a minute fraction of the total energy emanating from the course, 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 conveked 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 of, the receiving device) By these means decided advantages have been secured in many instances, but very often the improvement is either not applicable at all, or, if so, the gain is very slight. Evidently, when the source is one producing a continuous pressure or delivering im5 299
