Nikola Tesla U.S. Patent 725,605 - System of Signaling Patent Wrapper Page 29

) ) ( do de 2 مل combination with a receiver comprising a plurality of elements and dependent for operation upon their conjoint action, of a means for producing a plurality of distinctive kinds of disturbances or impulses, severally adapted to 1 actuate the elements of the receiver, as set forth. 1 2. In a system for the transmission of electrical energy, the combination with a receiver comprising a plurality of elements and dependent for operation upon their conjoint action, of a transmitter having a plurality of elements capable of severally producing distinctive kinds of disturbances or impulses, each kind being adapted to actuate one only of the elements of the receiver, as set forth. 3. In a system for the transmission of electrical energy, the combination with a receiver comprising a plurality of elements and dependent for operation upon the conjoint action of two or more of the same, of a transmitter adapted to produce a plurality of distinctive kinds of disturbances or impulses, each kind being adapted to ac tuate one only of the elements of the receiver, as set forth. 4. In a system for the transmission of electrical energy, the combination with means for producing two or more distinctive kinds of disturbances or impulses, of receiving circuits, each ddapted to respond to the waves or impulses of one kind only, and a receiving device dependent for operation upon the conjoint action of the several receiving circuits, as set forth. 5. In a system for the transmission of electrical impulses and the operation or control of signalling or other apparatus thereby, the combination with a transmitter adapt-11643