Nikola Tesla Patents
1 [ ) 1 { 1 time of an observatory, or for ascertaining the relative position of a body or distance of the same with referenco to a given point, or for determining the course of a moving object, such as a vessel at sea, the distance traversed by the sante or its speed, or for producing many other such desired effects at a distance as may be made dependent on the intensity, wave-length, direction or velocity of movement or other characteristic feature or property of disturbances of the kind described. I shall typically illustrate the manner of applying my discovery by describing one of the specific uses of the same, namely, the transmission of intelligible signals or messages between two distant points, and with this object reference is now made to the accompanying drawing, in which, Fig. 1 represets diagrammatically the generator which produces stationary waves in the ground, and Fig. 2 an apparatus, situated in a remote locality, for recording the effects of these waves. In Fig. 1 A designates a primary coil forming part of a transformer and consisting generally of a few turns of a stout cable of inappreciable resistance, the ends of which are connected to the terminals of a source of powerful electrical oscillations, diagrammatically represented by B. This source is usually a condenser charged to a high potential and discharged alterna taly in rapid succession through the primary, as in a type of transformer invented by me, and now well known. But when it is desired to produce such stationary waves of great lengths, an al -5523
