Nikola Tesla Patents
394 purpose. It is also evident that a device, such as I have already referred to, which offers a more ready passage to impulses of one sign or permits only impulses of the same sign to pass, may also be used to perform this selective function in many cases when alternating impulses are received. When the impulses are long and all of the same diection, and even when they are alternating but sufficiently long in duration, and sustained in electromotive force, the brushes b and b' may be adjusted so as to be ar on the parts B B' of the cylinder A, or the cylinder and its brushes may be omitted and the terminals of the condenser connected directly to the plates P and P'. It will be seen that, by the use of my invention, results hitherto unattainable in utilizing disturbances or effects transmitted through natural media, may be readily attained since, however great the distance of such transmission, and however feeble or attenuated the impulses received, enough energy may be accumulated from them by storing up the energy of succeeding impulses for. a sufficient interval of time, to render the sudden liberation of it highly effective in operating a receiver. In this way receivers of a variety of forms may be made to respond effectively to impulses too feeble to be detected or to be made to produce any sensible effect in any other way of which I am aware, a result of great value in scientific research as well as in various applications to practical use. To: What I claim as my invention and desire to secure by letters patent, is: -15
