Nikola Tesla U.S. Patent 723,188 - Method of Signaling Patent Wrapper Page 27

584 ſueelled Cau F cardwell Rowland inſhyment Wilson this conjoint عمل action of F zug ३ El brations of a certain kind or class produced either simultaneously or successively by a suitable transmitter. It will be seen from a consideration of the nature of the method hereinbefore described, that the invention is applicable not only in the special manner described, in which the transmission of the impulses is effected through natural media, but for the transmission of energy for any purpose and wret ever the medium through which the impulses are conveyed. What I claim is: The method of operating distant receivers which consists in producing and transmitting a plurality of kinds ¡ or classes of electrical impulses or disturbances, actuating by the impulses or disturbances of each kind or class one of 1. a plurality of circuits tuned to respond to impulses of such 1 kind or class and operating or controlling the operation of a receiver by the conjoint action of two or more of said circuits, as set forth. 2. The method of signalling, which consists in producing and transmitting a plurality of kinds or classes of electrical impulses or disturbances,/developing by the inpulses of each class a current in one of a plural ity of re} ceiving circuits tuned to respond exclusively thereto, and controlling by means of such circuits a local circuit, as set forth. 3. The method of signalling which consists in producing a plurality of series of impulses or disturbances differing fran each other in character and order of succession, exciting by the impulses of each series one of a plurality of receiving circuits tuned to respond exclusively thereto and controlling by, such circuits a local circuit, as set 2 -101 1