The U.S. Patents of Nikola Tesla

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The poles' 40 the ring Fig, 3“will consequence be shifted position ninety degrees from that at the start, shown. D cylindrical drum armature-0 re, which, for obvious reasons, should split up as far practicable topreventthe circulation within currents induction. and 4*illustrate the conditions which exist when the generator-armature has coru- 50 pleted three-eighths revolution. The poles will consequently shifted through one half of 65 the ring. The core is wound longitudinally with two coils, and E', the ends which are respectively con­ nected insulated contact-rings ff, car­ ried the shaft a,,upon which the armature is mounted. 5s. shown cut away on opposite sides; but this have found not essential effecting its rotation, circular disk, indicated dotted lines, also set in rotation. 6a; or, other words, the poles the ring will shifted along five- eighths its periphery. have like manner shown the conditions existing each succes­ sive eighth one revolution the remaining 45 figures. this position coil B' develops less powerful current, but the same direction before. The coil the other hand, having entered field opposite polarity, generates current opposite di­ rection. These figures will be readily understood from the foregoing. Here both coils are generating currents; but the coil B', having now entered the opposite field, is generating current the opposite direction having the opposite magnetizing effect; hence . view elevation and part ver­ tical section motor: Fig. this phase coil B is the neutral position, while coil gen­ erating its maximum current, which the same direction Fig. Fig, end or side view generator with the fields sec­ tion. This phenomenon attribute to a certain inertia resistance inherent the metal the rapid shifting the lines force through the same, which results continu­ ous tangcutial pull upon the disk, causing its rotation. one-half one revolution the armature ofthe generator hasbeen completed, and the resulting magnetic condition the 60 ring shown Fig. results, therefore, that when the 25 generator-coils have made one-eighth re­ volution, reaching the position shown Fig. and the same manner illustrate the phases the generator and ring three- quarters revolution, and Figs. Fig. 1the current in the coil practically nil, whereas the coil the same time developing its maximum current, and the means indicated 15 the description Fig. The disk owing to its tendency assume that position which it embraces the greatest possible number the magnetic lines, set rotation, following the motion the lines the points greatest attraction. the posi­ tion the coils indicated Fig. At the point indicated the current the coil B is maximum, while nil, the latter coil being its neutral.382,280 refer the diagrams, Figs. This form motor may used place of that shown. This seems confirmed the fact that circular disk steel more effect­ ively rotated than one soft iron, for the rea­ son that the former assumed poeseoa a greater resistance the shifting the mag­ netic lines. The disk Fig. and ato 8", for illustration the various -phases through which the coils the generator pass when operation, and the corresponding and 5 resultant magnetic changes produced the motor. In Fig. When acomplete revolution isaccomplished, the conditions existing the start are re-es­ tablished, and the same action repeated for the next and all subsequent revolutions, and in general will now seen that every revolu­ tion the armature the generator produces a corresponding shifting the poles lines, of force around the ring.55 the resultant pole will the line as shown.signifi­ cance. the armature the generator has progressed one-fourth revolution. In Fig. and 8* the same seven eighths revolution of the generator-arniature. The armature set revolve within an . The resultant poles will therefore be in the line Fig. short reference these figures will suffice understanding their. 30 The position the poles will therefore the resultant ofthe magnetizing forcesofthe coils— that say, will advance along the ring to a position corresponding one-eighth the revolution the armature the generator. The revolution the armature the generator between the field-magnets ob­ viously produces the coils alternating currents the intensity and direction which to depend Upon well-known laws. 2, both pairs coils, and O', will trav­ ersed current and act opposition so far the location the poles concerned. top view of the same with the field section and' a diagram connections. the armature has completed five- eighths revolution. In illustration other forms apparatus, by means which carry out invention, I shall now describe the remaining figures of the drawings. Figs. This effect utilize in producing the rotation body arma­ ture variety ways—for example, apply­ ing the principle above described theappa- ratus shown Fig.position. 35 Fig. the circuitinclud- ing this coil may also include, say, the coils C C the motor, Fig. The result, with the proper connections, would the magnetiza­ tion the ring the poles being the line 20 The same, order connections being observed between the coil and the coil C', the latter when traversed current tend to fix the poles right angles the line of Fig.. Figs