The U.S. Patents of Nikola Tesla

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These losses reduce greatly both the intensity and the nuíhber the cooperative impulses, and 45 since the initial intensity each these is necessarily limited only insignificant amount energy thus made available for a single operation the receiver. the terminals the condenser 130 connect the receiver which operated in series with another device suitable con­ struction, which performs the function pe­ riodically discharging the condenser through . A great variety disturbances, produced either suitably-constructed transmitters or natural causes, are present known 100 to propagated through the natural media, and there are also variety means de­ vices enabling energy stored, and in view this wish say that consider the utilization any such disturbances and the 105 employment any these means within the scope present invention long as the use the general method hereinbefore stated involved. 721,790, and which, broadly stated, consists effecting during any desired time interval storage 75 energy derived from such impulses and util­ izing the potential energy obtained for op­ erating receiving device. overcome these and other limita­ tions and disadvantages that have heretofore 65 existed such systems transmission of’sig- nals intelligence and render possible an investigation impulses disturbances propagated through the natural media from any kind source and their practical utili­ zation for any purpose which they are ap- 70 plicable, have devised novel method,which I have described pending application, filed June 24, 1899, Serial No. The chief feature which distinguishes the method present from that former invention, just referred to, that the energy 85 stored not, the former instance, ob­ tained from the energy the disturbances or effects transmitted from distance, but from independent source. Evidently when the source one producing continu- 33 ous pressure delivering impulses long duration impracticable magnify the effects this manner, and when, the other hand, one furnishing short impulses'Of extreme rapidity succession the advantage 40 obtained this way insignificant, owing to the radiation and the unavoidable frictional whste the receiving-circuit.685.956 vantage. this amount consequently dependent the So energy conveyed the receiver one single impulse, evidently necessary employ either very large and costly, and therefore objectionable, transmitter, else resort to the equally objectionable use receiving 53 device too delicate and too easily deranged. In the practical application this method I usually proceed follows: any point where desire investigate utilize for 120 any purpose effects disturbances propa­ gated through the natural media from any kind source provide suitable generator of electricity—as, for example, battery and a condenser—which connect the poles 125 the generator series with sensitive de­ vice capable being modified its elec­ trical resistance other property the ac­ tion the disturbances emitted from the source. The best way carrying out invention no which present know store electrical energy obtained from suitable electrical generator condenser and control the storage the application this energy by means sensitive device acted upon 115 the effects disturbances, and thereby cause the operation the receiver. Expressed generally, the present method 90 consists charging storage device with en­ ergy from independent source, controlling the charging said device the action the effects disturbances transmitted through the natural media, and coincidently using 95 the stored energy for operating receiving device. Furthermore, the enei’gy obtained through the cooperation the impulses the form of extremely rapid vibrations and because of this unsuitable for the operation ordinary 60 receivers, the more this form energy imposes narrow restrictions regard the móde and time its application such de­ vices.to taken many those im­ provements which are practicable the or­ dinary systems transmission involving the use metallic conductor. 30 these means decided advantages have been secured many instances; but very often the improvement either not applicable all, of, so, the gain very slight. Furthermore, since in most cases the amount energy conveyed to the distant circuit but minute fraction 15 the total energy emanating from the source it necessary for the attainment the best results that whatever the character the re­ ceiver and the nature the disturbances as much possible the energy conveyed 20 should made available for the operation of the receiver, and with this object view I have heretofore, among other means, em­ ployed receiving-circuit high self-induc­ tion and very small resistance and period 25 such vibrate synchronism with the dis­ turbances, whereby number separate im­ pulses from the source were made cooperate, thus magnifying the effect exerted upon and insuring the action the receiving device. My present invention intended for the same general purposes, and comprises an- 80 other apparatus means which similar results may obtained. 5 Obviously whatever method employed it desirable that the disturbances produced by the transmitting apparatus should as powerful possible, and the use cer­ tain forms high frequency apparatus, io which have devised and which are now well known, important practical advantages are in this respect secured