Nikola Tesla U.S. Patent 512,340 - Coil for Electro-Magnets Patent Wrapper Page 7

X J or ing, have not been appreciated or taken advantage of. In carrying out my invention it is to be observed that certain facts are well understood by those skilled in the art, viz; the relations of capacity, self-induction, and the frequency and potential difference of the current. What capacity, therefore, in any given case it is desirable to obtain and what special winding will secure it, are readily de terminable from the other factors which are know. WHAT I CLAIM AS MY INVENTION IS: 1. A coil for electric apparatus the adjacent convolut ions of which form parts of the circuit between which thee exists a potential difference sufficient to secure in the coil a capacity capable of neutralizing its self-induction, as hereinbefore described. 2. A coil composed of contiguous or adjacent insulated conductors electrically connected in series. and having a potential difference of such value as to give to the coil as a whole, a capacity sufficient to neutralize its self-induction, as set forth. Nikole Tesle WITNESSES: Rolet F. Taylord Parker. Page 7