Nikola Tesla Patents
31313 CICL3 63 63DDCDD 63 13 L) LI In this case the action at a given distance will be the stronger the larger the area enclosed by the conductor and the greater the rate of change of the current. If the latter were generated in the ordinary ways, the rate of change, and consequently the distance at which the action would be practically available for the present purpose, would be very small; but by adopting such means as I have devised, that is either by passing through the conducting path currents of a specially designed high frequency alternator or better still, those of a strongly charged condenser, a very high rate of change may be obtained, and 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 condenser 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 poten-1 tial 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 -4[This page retyped from microfilm for better readability - Ed.] 257
