Nikola Tesla Patents
Cancelled My invention is particularly useful in connection with methods and apparatus for operating distant receiving devices by means of electrical disturbances produced by proper transmitters and conveyed to such receiving devices through the natural media, but it involves, among other things, the employment of apparatus of novel character which may be used for other purposes, such, for example, as the investigation or utilization of terrestrial solar or other disturbances produced by natural causes. Several ways or methods of transmitting electrical disturbances through the natural media and utilizing them to operate distant receivers are now known, and have been applied with more or less success for accomplishing a variety of useful results. One of these ways consists in producing, by a suitable apparatus, rays or radiations, that is, disturbances, which are propagated in straight lines through space, directing them upon a receiving or recording apparatus at a distance, and thereby bringing the latter into action. This method is the oldest and best known, and has been brought particularly into prominence in recent years through the investigations of Heinrich Hertz. Sub Spec. Another method consists in passing a current through a circuit, preferably one enclosing a very large area, inducing thereby in a similar circuit situated at a distance, another current, and affecting by the same, in any convenient way, a receiving device. Still another way, which has also been known for many years, is to pass, in any suitable manner, a current through a portion of the ground, as by connecting to two -2[This page retyped from microfilm for better readability - Ed.] 331
