Nikola Tesla Patents
304 the shaft S and it will be seen that, whenever one of the segments f comes in contact with the brush k, the circuit including the the receiver R is completed and the condenser discharged through the same. By an adjustment of the speed of rotation of the cylinderd and a displacement of the brush k along the cylinder the circuit may be made to open and close in as rapid succession, and remain open or closed during such intervals of time, as may be desired. The plates and P through which the electrifications are conveyed to the brushes a and a', may be at a considerable distance from each other, and both in the ground or both in the air, or one in the ground and the other in the air, preferably at some height, or they may be connected to conductors extending to some distance, or to the terminals of any kind of apparatus Cancelled supplying electrical energy, which is obtained from the energy der Sub. Spec I the impulses or disturbances transmitted from a distance, through the natural media. In illustration of the operation of the devices described, let it be assumed that alternating electrical impulses from a distant generator, as G, are transmitted through the earth, and that it is desired to utilize those impulses in accordance with my method. This may be the case, for example, when such a generator is used for purposes of signalling in one of the ways before enumerated, as by having its terminals connected to two. points of the earth distant from each other. In this case the plates P and P' are first connected to two properly selected points of the earth; the speed of rotation of the cylinder A is varied until it is made to turn in synchronism with the alternate impulses of the generator, and, finally, the position of the brushes, b ahd b', is adjusted by angular displacement, as usual, or in other ways, so that they are in contact 10
