Nikola Tesla Patents
from here. out. Див. a' out to operate distant receivers have here tof ore been devised by myself and others, and applied with more or less success for accomplishing a variety of useful results. One of these ways consists in producing, by a suit5 able apparatus, rays or raditions, 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 10 been brought particularly into prominence in recent years through the investigations of Heinrich Hertz. Its limitations are self-evident, the chief be ing found in the inability of the rays to pass through ordinary obstacles and in the fact that their energy diminishes, as a 15 rule, very rapidly with the distance, owing to the great absorption of the energy which takes place in their transit through the media. This, and the difficulty of proucing an economical source of adequate power, has made it, so far, impracticable to concentrate a sufficient amount 20 of energy upon the receiver when it is at any very considerable distance from the source. 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 dis25 tance, another current, and affecting by the same, in any convenient way, a receiving device. This method has also been known for a long time and, while it is necessarily subject to certain serious disadvantages, it offers a number of decided advantages. Under conditions frequent - 36 ly occurring in practice, the energy of the impulses transmitted diminishes much less with the distance than -2381
