. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . annaturi within it are similarly magneti/.id, andU])on the cessation or rcNi-rsal of the current the armature and\\v\i\ repel cacli other and lotution is produced in this wa\. 48(1 INVENTIOyS OF yiKOLA TESLA. Another iiitcivstiiiir (.xliibit, sliowii at c, is an earlv inodfl (»f atwo field motor enerjfized bv currents of different phase. Then-are two inde])endent tiehls of hmiinated iron joined by brassb(»lts; in each field is mounted an armature, bc
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . annaturi within it are similarly magneti/.id, andU])on the cessation or rcNi-rsal of the current the armature and\\v\i\ repel cacli other and lotution is produced in this wa\. 48(1 INVENTIOyS OF yiKOLA TESLA. Another iiitcivstiiiir (.xliibit, sliowii at c, is an earlv inodfl (»f atwo field motor enerjfized bv currents of different phase. Then-are two inde])endent tiehls of hmiinated iron joined by brassb(»lts; in each field is mounted an armature, bc^th armatures be-injr on the sjime shaft. The armatures were oripnally so ar-raiiired as to be plaeed in any ]iosition relatively to each other,and the fields also were arranged to be connect<?d in a number(»f ways. The mot«)r has served for the exhibition of a numl»erof features; among other thin<rs, it has been used as a dynamofor the i^ioduction of currents of any frequency between widelimits. In this case the field, instead of beiiii; energized by di-rect cniTciit. cncri^n/.tMl l)y currents in phase, which. ^ 2its ]>r(>(lucc<l a rofarion f tlie llehl : the aniiatui-c was then rotatedin the same or in opposite direction to the movcMnent of the field;and so any number of alternati(»ns of the currents induced influxarmature, from a small t a hiirh nnmbcr. determined by thefre(puncy of the ent i^iri/inir field ciiil>and the speed of the arma-ture, was obtaiiKMJ. The models n, i,.i, re])resent a variety of rotating field, synchron-ous nutfors which are of sj>ecial vahie in hnig distance transmis-sion W(»rk. The |>rin<iple endtodied in these motors was etninci-ated by Mr. Tesla in his lecture bef(»re the American Institute ofElectriciil Engineers, in May, lSS,s. It involves the production 1. See Part I. Chap. Ill, page 9. PERSONAL EXHIBIT AT THE WORLDS FAIR. 481 of the rotating field in one of the elements of the motor by
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
