Nikola Tesla Patents
228 the effective range of the influence thus extended over a vast area, and by carefully adjusting the circuit on the moving body so as to be in exact electro-magnetic synchronism with the primary disturbances, this influence may be utilized at great distances. Another way to carry out my invention is to direct the currents or discharges of a high frequency machine or denser through a circuit, one terminal of which is connected directly or inductively with the ground and the other to a body, preferably of large surface and at an elevation. In this case if the circuit on the moving body be similarly arranged or connected, differences of potential on the terminals of the circuit either by conduction or electrostatic induction are produced, and the same object is attained. Again, to secure the best action, the receiving circuit should be adjusted so as to be in electromagnetic synchronism with the primary source as before, but in this instance it will be understood. by those skilled in the art that, if the number of vibrations per unit of time be the same, the circuit should now have a length of conductor only one half of that used in the former case. Still another way is to pass the currents simply through the ground by connecting both the terminals of the source of high frequency currents to earth at different and remote points and to utilize the currents spreading through the ground for affecting a receiving circuit properly. placed and adjusted. Again, in this instance, if only one of the terminals of the receiving circuit be connected to the ground--the other terminal being insulated-- the adjustment as to synchronism with the source will require (4)
