The U.S. Patents of Nikola Tesla

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In the disposition shown Fig. The combination, motor, primary energizing-coils adapted connected 105 source current and.forth. coils may insert dead resist­ ance this means the difference of phase between the primary and secondary 70 increased. let designate the field-magnet of motor which, all these motors, is built sections plates. Thus the self-induction the secondary is kept down and its resistance increased with the result decreasing the lag between 50 the impressed electro-motive force and the current the primary coils and increasing the difference phase between the primary and secondary currents. ., E.eter and having but few turns around the cores; use some conductor of higher specific resistance, such German 45 silver; may introduce some point in the secondary circuit artificial resistance R. the lag 55 the secondary increased increasing the self-induction that circuit, while the increased tendency the primary lag is counteracted inserting therein deád re­ sistance. This may done the proper winding the coils, the circuit including the secondary coils may in- 65 troduce self-induction coil while the primary circuit from the generator and in­ cluding.comparatively sinali diam.445,207 actual difference -of phase between its own and the primary current, first, diminish­ ing the lag between the primary current and the impressed electro-motive force, and, sec- S ond, its own lag retardation behind the impressed electro-motive force. do 40 this using for the secondary circuit, par­ ticularly the coils wire of. The combination,in motor,ofa primary energizing-circuit adapted connected with the circuit generator and second­ ary energizing-circuit inductive relation 95 thereto, the two circuits being -different electrical character resistance, set forth. The better results are obtained when the primary has low self-induction. The details the improvements are illus­ trated the drawings, which- Fignrel diagram motor exhibiting my invention. I not claim, broadly, herein the method 85 of operating motors inducing one cir­ cuit currents means those another, nor the other features herein not specifically pointed out the claims; having personally filed applications for such features. 3. Witnesses: R. 80 In practice have found desirable to wind the armature with closed ceils which currents are induced the action thereon of the primaries. Fig; similar diagram of 20 modification the same. Coffin. apply these prin­ ciples the construction motor which I 15 shall now describe. 2.. 90 What claim is— 1. evident that both means of increasing the difference phase—namely, by the special winding well the sup­ plemental external inductive and dead re­ sistance-may employed conjointly. 75 In the operation this motor the current impulses the primary coils induce currents in the secondary coils, and the conjoint action the two the points greatest mag­ netic attraction are shifted rotated. .currents both primary and sec­ ondary coils such motor Will retarded or will lag behind the impressed electro-ino- 35 tive force; but secure proper difference in phase between the primary and secondary currents themselves increase the resistance of the circuit the secondary and reduce as much practicable its self-induction. are polar projections upon which the! coils are wound. The primary coils this case have low self-induction and high resist- 60 ance, while the coils included the sec­ ondary circuit, have high self-induction and low resistance. In Fig.secondary energizing- coils circuit inductive relation thereto, one set said coils being formed conduct­ ors small size and few turns, the other by conductors larger size, set. The combination, inamotor,of primary energizing-circuit adapted connected with the circuit generator and second- 100 ary energizing-circuit inductive relation" thereto, the two nircuits being different self-induction, herein sét forth. NIKOLA TESLA. the other hand, the secondary circuit have a high self-induction its lag behind the cur­ rent the primary directly increased, io while will still further increased the primary have a\Try lowself-induction. 25 Upon one pair these poles, wind primary coils which are directly connected to the circuit alternating-current gen­ erator the Same poles also wind sec­ ondary coils eithér side side over or 30 under the primary coils, and these connect with other coils which surround the poles B The . 'Sidney, Jr