To all whom it may concern:—
Let it known that I, Nikola Tesla, of New York, in the County and state of Yew York, electrician, have invented certain new and useful improvements in methods of an apparatus for the electrical transmission of power and I do hereby declare that the following is a full, clear and exact description of the same.
The practical solution of the problem of the electrical conversion and transmission of mechanical energy involves certain requirements which the apparatus and systems heretofore employed have not been capable of fulfilling.
Such a solution primarily demands a uniformity of speed in the motor, irrespective of its load within its normal working limits. On the other hand, it is necessary to attain a greater economy of conversion than has heretofore existed, to construct cheaper, more reliable and simple apparatus, and such that all danger and disadvantages from the use of currents of high tension, which are necessary to an economical transmission, may be avoided.
This invention comprises a new method and apparatus for effecting the transmission of power by electrical agency whereby many of the present objections are overcome and great economy and efficiency secured.
In the practice of this invention a motor is employed in which there are two or more independent energizing circuits through which are passed, in the manner hereinafter described, alternating, currents, which effect a progressive shifting of the magnetism or of the "lines of
