The U.S. Patents of Nikola Tesla

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, ASSIGNOR ONE-HALF CHARLES F. Without enumeratingthe objections these systems detail, will suffice say that the 70 theory the principle the action opera­ tion these devices has apparently been so little understood that their proper construc­ tion and use have the present time been attended with various difficulties and great 75 expense.United States Patent Office. These consist induction-machines various kinds. The cur­ rent developed thereby conducted through a transmission-circuit one more distant 35 points which the transformers are located. The transformers are very liable to be injured aud burned out, and the means re­ sorted for curing this and other defects have almost invariably been the expense of efficiency. The motor-coils are generally of fine wire and the generator-coils coarser wire, produce current greater quantity and lower potential than the line-cur­ rent, which relatively high potential, 6c avoid loss long transmission. Application filed December 23, 1887. SYSTEM ELECTRICAL DISTRIBUTION. PECK, ENGLEWOOD, NEW JERSEY. 381,970, dated May 1,1888. (No model. similar ar­ rangement wind coils corresponding to those described ring similar core, and by means commutator suitable kind to direct the current through the inducing-coils 65 successively, maintain movement of the poles the core and the lines force which set the currents the induced coils. The main objects the invention are the same have been heretofore obtained the 20 use these systems—viz. This invention relates those systems of electrical distribution which current from a single source supply main trans­ mitting circuit caused induce means 15 suitable induction apparatus current or currents independent working circuit or circuits. 80 The form converter transformer which I have devised appears largely free from the defects and objections which have al­ luded., divide the cur­ rent from single source,whereby number of lamps, motors, other translating devices may independently controlled and operated by the same source current, and some 25 cases toreduce current high potential in the main circuit one greater quantity and lower potential the independent consump­ tion working circuit circuits. The general character the devices em- 30 ployed these systems now well under­ stood. Serial No. The . While not herein advance any theory its mode operation, would 85 state that, far the principal con­ struction concerned, analogous those transformers which have above described as electro -dynamic induction -machines, except that involves moving parts whatever,and 90 is hence not liable wear other derange­ ment, and requires more attention than the other and more common induction-machines. SPECIFICATION forming part Letters Patent No. some cases ordinary forms ofinduc­ tion-coil have been used with one coil the transmitting-circuit and the other local 40 consumption circuit, the coils being differ­ ently proportioned according the work to be done the consumption-circuit-— that is to say, the work requires current higher potential than that the transmission circuit 45 the secondary induced coil greater length and resistance than the primary,while, on the other hand, quantity current of lower potential wanted the longer coil is made the primary.) To all idiom concern: Be known that Nikola Tesla, from Smiljan Lika, border country Austria-Hun­ gary,now residing New York,in the county 5 and State New York, have invented certain new and useful Improvements Systems of Electrical Distribution, which the following is specification, reference being had the drawings accompanying and forming part of ro the same. alternating-current magneto-ma­ chine used the source ofsupply. In carrying out invention provide á series inducing-coils and corresponding in- 95 duced coils,which, preference, wind upon a core closed upon itself—such asan annulus or ring subdivided the usual manner. lieu these devices various forms electro dynamic induction- 50 machines, including the combined motors and generators, have been devised. For instance, a motor constructed accordance with well- understood principles, and the same arma­ ture are wound induced coils which constitute ,j a generator. 258,787. NIKOLA TESLA, NEW YOKE, Y