Nikola Tesla U.S. Patent 723,188 - Method of Signaling Patent Wrapper Page 54

pub ok. the transmitting circuits or systems illustrated in Figs. 3, 4 and 5, in which case the corresponding disks, as D3 D4 D5, at the sending, will be driven in synchronism with those at the receiving stations as far as may be necessary to secure the desired result. But whateer the nature of the specific devices employed, it will be seen that the fundamental idea in my invention is the operation of a receiver by the conjoint or resultant effect of two or more circuits, each tuned to respond exclusively to waves, impulses or vibrations 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 manncer described, in which the transmission of the impulses is effected through natural media, but for the transmission of energy for any purpose, and whatever the medium through which the impulses are conveyed. What I claim is: 1. 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 a plurality of circuits tuned to respond to impulses of such 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 me thcd of signalling, which consists in producing and transmitting a plurality of kinds or classes of electrical impulses or disturbances, developing by the impulses of each class a current in one of a plurality of receiving circuits -10611