NIKOLA TESLA U.S. PATENT 413,353 - METHOD OF OBTAINING DIRECT FROM ALTERNATING CURRENTS. US, 1889
UNITED STATES PATENT OFFICE. NIKOLA TESLA, OF NEW YORK, N. Y., ASSIGNOR OF TWO-THIRDS TO ALFRED S. BROWN, OF SAME PLACE, AND CHARLES F. PECK, OF ENGLEWOOD, NEW JERSEY METHOD OF OBTAINING DIRECT FROM ALTERNATING CURRENTS. SPECIFICATION forming part of Letters Patent No. 413,353, dated October 22, 1889. Application filed June 12, 1889. Serial No. 314,069. (No model.) To all whom it may concern: Be it known that I, NIKOLA TESLA, a subject of the Emperor of Austria, from Smiljan, Lika, border country of Austria-Hungary, temporarily residing in New York city, in the State of New York, have invented a certain new and useful Improvement in Methods of Obtaining Direct from Alternating Currents, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same. In nearly all the more important industrial applications of electricity the current is produced by dynamo-electric machines driven by power, in the coils o...