Nikola Tesla U.S. Patent 725,605 - System of Signaling Patent Wrapper Page 16

630 Wilson 30846-97 do do do tion will always be carried out so long as the operation of the receiver is made dependent on the action of more than one series or kind of waves, impulses or disturbances. What I claim as my invention is 1. In a system for the transmission of energy through the natural media, the combination with means for producing two or more series or kinds of impulses or disturbances, of a receiver dependent for operation upon the conjoint action of both or all of the said ser kinds of impulses or disturbances, as set forth. 2. In a system for the transmission of energy through the natural media, the combination with means for producing two or more series or kinds of impulses or disturbances, of receiving circuits, each adapted to respond to the impulses or disturbances of a particular series or kind, and a receiving device dependent for operation upon the conjoint action of the receiving circuits, as set forth. 3. In a system for the transmission of electrical impulses through the natural media and the operation or control of signalling or other apparatus thereby, the combination with a transmitter adapted to produce electrical impulses or disturbances of different kinds, of sensitive receiving circuits, each adapted to respond to the impulses or disturbances of a particular kind, and a receiving device dependent for operation upon the conjoint action of the sensitivè circuits, as set forth. 4. In a system for the transmission of electrical impulses through the natural media, and the operation or control of signalling, or other apparatus thereby, the combination with a transmitter adapted to produce two or more series more s -10[This page retyped from microfilm for better readability Ed.]