The U.S. Patents of Nikola Tesla

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683,524. For example, in certain gas explosive engines flame or spark necessary for the ignition ex­ plosive mixture air and gas under the pis- 20 ton, and the most effective way igniting the gaseous mixture has been found the production the cylinder the proper mo­ ments electric spark. The ends the secondary circuit the Too transformer above mentioned are connected with the points terminals the machine between which the spark pass, and fol­ lowing the short-circuiting the condenser by the closing the switch, strong second- 105 ary discharge induced the discharge the i i . 609,250, dated August 16,1898. The circuit thus closed includes condenser, which by this operation the switch permitted to discharge, through the primary trans­ former, energy which had previously re- 95 ceived during the interruption said circuit from battery discharge self-induc­ tion coil series with the battery the charging-circuit. Application filed February 17,1897. either case the em­ ployment quick-acting circuit-breaker is 45 necessary, for unless the induction-coil of' large size and the source current con­ siderable power slow gradual make and break the primary simple transformer, such would ordinarily effected a 50 switch commutator, would not effect dis­ charge the character necessary for the proper ignition the gas. 65 The object invention provide a more certain and satisfactory means for use with and control such machines appa­ ratus have mentioned for producing sparks discharges the desired character, 70 and this end employ the following ar­ rangement: Any suitable moving portion of the apparatus caused mechanically con­ trol the charging condenser and its dis­ charge through circiiit inductive relation 75 to secondary circuit leading the termi­ nals between which the discharge occur, so that the desired intervals the condenser may discharged through its circuit and in­ duce the other circuit current high po- 80 tential which produces the desired spark or discharge. E . NIKOLA TESLA, NEW YORK, Y. Serial Ho. Instead of thus temporarily closing the primary cir­ cuit the automatic circuit-breaker might be 40 permitted operate continuously, and the secondary, circuit normally broken, might be closed the proper time cause the spark to pass any point. The only prac­ ticable device which this has been accom- 25 plished heretofore induction-coil com­ prising primary and secondary circuit with a buzzer rapidly-acting automatic circuit- breaker the primary and circuit-control­ ler, such switch commutator, located 30 also the primary battery circuit and op­ erated some moving portion the appa­ ratus temporarily close such circuit the proper time, and thereby set operation the automatic circuit-breaker, which causes be- 35 tween secondary terminals the cylinder the discharge which necessary for the proper ignition the explosive mixture.nited States Patent Office. (Ho model,) To all whom, concern: Beit known that citizen of the United States, residing New York, in the county and State New York, have in- 5 vented certain new and useful Improvements in Electrical Igniters for Gas-Engines and Analogous Purposes, which the following is specification, reference being had the drawing accompanying and forminga part of io the same. One practical means accomplishing this is employ any proper form switch or commutator operated directly through 85 suitable intermediate devices moving part the apparatus and which caused to complete electric circuit which has been previously broken interrupted for ap­ preciable time when the occurrence the 90 spark discharge necessary. Benewed June 15, 1898. In certain kinds apparatus neces­ sary for the operation the machine itself or for effecting the object for which used to produce electric spark any othersimi- 15 lar local effect given instant time or at predetermined intervals. There is, however, form vibrating or quick-acting circuit-breaker which am aware that can depended upon operate 55 with certainty produce such spark or which will continue operate for any length of time without deterioration, and hence not only the case engines the kind de­ scribed, but other forms ofapparatus which 60 involve the use high-tension induction- coil with quick-acting circuit-breaker, the operation the machine contingent upon the proper operation comparatively in­ significant but essential part. SPECIFICATION forming part Letters Patent No