Nikola Tesla U.S. Patent 649,621 - Apparatus for Transmission of Electrical Energy Patent Wrapper Page 12

( ( J JIJ ] E Cancelled Pert Edison Edir medium, a secondary conductor in inductive relation to the receiving conductor and devices for utilizing the current in the circuit of said secondary conductor, as set forth. 3. The combination with a transmitting coil or conductor having its ends connected to ground and to an elevated terminal respectively, a conductor or circuit in inductive relation thereto, and a source of electrical oscillations connected with said last named conductor, of a receiving circuit or conductor having its ends connected to ground and an elevated terminal respectively, at a distance from the transmitting circuit and adapted to be excited by currents caused to be propagated by the transmitti ng coil through the intervening natural medium, as set forth. 2%. The combination with a transmitting coil or conductor having its ends connected to ground and to an elevated terminal respectively, a primary coil in inductive relation thereto and a source of electrical oscillations in said primary circuit, of a receiving conductor or coil having its ends connected to ground and to an eleva ted terminal respectively and adapted to be excited by currents caused to be propagated from the transmitter through the natural medium and a secondary circuit in inductive relation to the receiving circuit and receiving devices connected therewith, as set forth. 7 209