Nikola Tesla Patents
CIET 0 art condition 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 points 10 of the same, preferably at a considerable distance from each other, the two terminals of generator, and to energize by a part of the current diffused through the earth a distant circuit which is similarly arranged and grounded at two points widely apart and which is made to act upon a sensitive receiver. B 15 This mode of transmission offers rost of the advantages of the Cancelled preceding method, and, as it is much cheaper and as the energy per Siul spec of the impulses diminishes still less rapidly with the distanse, it is far more practicable. But, nevertheless, in the manner in which it has been heretofore experimented with, and with the 20 devices so far used in connection with it, it has been capable only of a very limited range of application. tances become very considerable, which is enormously enhanced by he generation of wasteful currents in the earth, the great expense and other disadvantages necessarily following from the use of long and heavy conductors enclosing large areas have 5 made this method, up to the present time, obviously impracticable for use over very great distances. It is important to observe that, in all the methods which have been mentioned, the receiving circuit or instrument must be maintained in a definite position with respect to the 25 transmitting apparatus, and this often imposes great limitations and disadvantages upon the use of the apparatus. reve 20 Another method, which was novel with me and was developed some years ago, is free from all these disadvantages, 3 297
