The U.S. Patents of Nikola Tesla

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Over these coils then wind shorter coils coarser wire, O', con­ stitute the induced secondary coils. For example, shown Fig. The 65 construction this any equivalent form of converter may carried further, above pointed out, inclosing these coils with iron— as, for example, winding over the coils a layer layers insulated iron wire. For exam­ ple, the present case employ pair or- 85 dinary permanent electro magnets, E, between which mounted cylindrical arma­ ture shaft, and wound with two coils, G G'. Fig. I use core, which closed upon itself— that say, annular cylindrical or equivalent form—and the efficiency the 55 apparatus largely increased the subdi­ vision this core make thin strips, plates, wires soft iron electrically insu­ lated far practicable. When this is . The 5 inducing primary coils wound the core are divided into pairs sets the proper electrical connections, that while the coils of one pair set co-operate fixing the mag­ netic poles the core two given diametric- io ally-opposite points, the coils the other pair or set—assuming, forsake illustration, that there are but two—tend fix the poles ninety degiees from such points. With this induc­ tion device use alternating-current gen- 1^ erator with coils sets coils correspond with those the converter, and means of suitable conductors connectup independ- • cnt circuits the corresponding coils the gen­ erator and converter. In illustration therefore the details of construction which present invention in­ volves, now refer the accompanying draw- 45 ir‘gs- Figure diagrammatic illustration of the converter and the electrical connections of the same. The device provided with suitable bind- 70 ing-posts, which the ends the coils are led. Upon this core, by any well-known method, wind, say, four 60 coils, B', which use primary coils, and for which use long lengths compara­ tively fine wire.331,970 two sets coils are wound side side su­ perposed otherwise placed well-known ways bring them into the most effective re- ' lations one another and the core. The gener­ ator this system will adapted the con­ verter the manner illustrated. Besides the currents generated the second­ ary coils dynamo-magnetic induction other currents will set the same coils con- 125 sequence any variations the intensity of the poles the ring This should avoided by maintaining the intensity the poles con­ stant, accomplish which care should be taken designing and proportioning the gen- 130 erator and distributing the coils the ring A and balancing their effect. Assuming coil Gto be connected circuit with coils the too converter, and coil with coils B', is evident that the poles the ring will be determined coils alone; but the armature the generator revolves, coil de­ delops more current and coil less, until 105 reaches its maximum and its neutral posi­ tion. Fig. The movement the coils through the next quarter turn, during no which coil enters field opposite po­ larity and . results from this 2 that the different electrical phases the gen­ erator are attended corresponding mag­ netic changes the converter; or, other words, that the generator-coils revolve the points greatest magnetic intensity the 25 converter will progressively shifted or whirled around. the shifting 120 the poles the ring powerful dynamic inductive effect the coils produced. The diametrically-opposite coils and B' B'are connected, respectively, series, and the four terminals are connected the bind­ ing-posts The induced coils ai-e con- 75 nected together any desired manner. This principle have ap­ plied under variously-modified conditions to the operation electro magnetic motors, and in previous applications, notably those hav- 30 ing Serial hios. 252,132 and 256,561,1 have de­ scribed detail the manner constructing and using such motors. horizontal central cross- section Fig. may con nected multiple arc when quantity cur­ rent desired—as for running group in­ candescent lamps, D—while may in- 80 depeqdently connected series circuit including arc lamps the like. The obvious result will shift the poles the ring through one-quarter of its periphery.generates current opposite direction and increasing strength, while coil G, passing from its maximum its neu­ tral position generates current decreas- 115 ing strength and same direction before, causes further shifting the poles through the second quarter the ring. diagram the cir- 5c cuits the entire system, the generator being shown section. The terminals these coils are con­ nected, respectively, four insulated contact 90 or collecting rings, IT, and the four line circuit-wires connect the brushes K, bearing these rings, the converter the order showm. the present appli­ cation object describe the best and most convenient manner which atpres- 35 ent aware carryingout the invention ap­ plied system electrical distribution; but one skilled the art will readily under­ stand from the description the modifica­ tions proposed said applications, wherein 40 the form both the generator and converter in the present case may modified. looting the results this com­ bination, will observed that given 95 point time the coil its neutral posi­ tion andisgeneratinglittle current,while the other coil, G', position where ex­ erts its maximum effect. The sec­ ond half-revolution will obviously repe­ tition the same action