The U.S. Patents of Nikola Tesla

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It will now more readily seen from the above description how far the requirements 75 a practical system electrical transmission of power are realized invention. the invention, ob­ vious that since the attractive effect upon the disk greatest when the disk its proper relative position the poles devel­ oped the ring R—that say, when its 65 ends poles immediately follow those the ring—the speed the motor for all the loads within the normal working limits the mo­ tor will practically constant. 55 The same result evidently obtained such a disposition that shown Fig. Having now described the nature in­ vention and some the various ways which it may carried into effect, would call attention certain characteristics which the 30 applications the invention possess and the advantages which the invention secures. and 19, for example, the terminals of each set field-coils are connected with the wires the two armature-coils such way that the field-coils will maintain opposite poles in advance the poles the armature.having made separate application for such method. This arrangement results increased speed rotation. 90 These motors may run series, multiple arc multiple series, under conditions well understood those skilled the art. other respects the opěration identically the same as the other cases cited. 15,or others constructed similar plan, the number alternating impulses resulting from one revolution the generator arma- ,50 ture double compared with the precéd- ing cases, and the polarities the motor are shifted around twice one revolution the generator-armature. independent” I not mean imply that the circuits are necessarily isolated from one another, for in some instances there might electrical con­ nections- between them regulate modify 105 the action the motor without necessarily producing new different action. The means devices for carrying out the principle may varied far greater ex- 95 tent than have been able indicate; but I regard within invention, aud desire to secure Letters Patent general, motors containing two more independent circuits through which the operating-currents are led icc in the manner described. 2 - > In' the drawings the field coils are shunts to the armature, but they may series or in independent Circuits. The combination, with motor contain­ ing separate independent circuits the armature field-magnet, both, alter­ nating-current- generator containing induced .381,968 tablished between the rings the generator- shaft and those the motor-shaft collect­ ing brushes and wires,aspreviously explained. 125 In this application not claim the method of operating motors which herein involved, . will observed that since the disk has tendency follow 35 continuously the points greatest attraction, and since these points are shifted around the ring once for each revolution the armature of the generator, follows that the movement of the disk will synchronous with that of 40 the armature This feature practical demonstrations have found exist all other forms which one revolution the armature the generator produces shifting of the poles the motor through three hun- 45 dred and. It obvious that the same principle may be „ applied the various typical forms motor 25 hereinbefore described. In motor, considering for convenience that represented Fig. clearly • apparent that the speed can never exceed the arbitrary limit determined the gener- ;o ator, and also that within certain limits at least the speed the motor will independ­ ent the strength the current. I aware that the rotation the arma­ ture motor wound with two energizing- coils right angles each other has been 110 effected intermittent shifting the en­ ergizing effect both coils through which a direct current means mechanical de­ vices has been transmitted alternately-op-' posite directions; but this method plan Ire- 115- gard absolutely impracticable for the pur­ poses for which invention designed—at least any extended scale—for the reasons, mainly, that great waste energy neces­ sarily involved unless the number energiz- 120 ing-circuits very great, and that the inter­ ruption and reversal current any con­ siderable strength means any known mechanical devices matter the greatest difficulty and expense.sixty degrees. typk. The speed the motor will; therefore, twice that the generator. I therefore claim the following: 130 1. 17, where the poles both elements are shifted op­ posite directions. In iS Figs. In order properly energize the field-magnet 5 the motor, however, the connections are so made with the armature coils wires leading thereto that while the points greatest at­ traction greatest density magnetic lines of force upon the armature are shifted one io direction those upon the field-magnet are made to progress opposite direction. In the particular construction shown Fig. se- cure, first, uniform speed under all loads within the normal working limits the mo­ tor without the use any auxiliary regulator; 80 second, synchronism between the motor and generator; third, greater efficiency the more direct application the current, no commntating devices being required either the motor generator; fourth, cheapness aud 85 simplicity mechanical construction and economy maintenance; fifth, the capability of being very easily managed controlled; and, sixth, diminution danger from injury to persons and apparatus. Again, considering theapparatus illustrated 60 Fig