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ANTENTOP- 02- 2003, # 003

The Wireless Power Transmission System


To make sure that the difference between the type of fields he intended and those of Hertz was understood he explained:

…As the term electrostatic might imply a steady electric condition, it should be remarked, that in these experiments the force is not constant, but varies. When two conducting bodies are insulated and electrified, we say that an electrostatic force is acting between them.[7]

Tesla's emphasis on the non-Hertzian nature of his signaling process, particularly when taken within the context of his work with electrostatics, indicates the mode of propagation assumed by the patent involves setting up an electrostatic field of force between the transmitter and receiver.

As he often insisted, this mode of transmission differs significantly from that of Hertzian waves in that this one is a form of conduction:

…So far, I have considered principally effects produced by a varying electrostatic force in an insulating medium, such as air. When such a force is acting upon a conducting body of measurable dimensions, it causes within the same, or on its surface, displacements of the electricity, and gives rise to electric currents ...[8]

He advocated such a form of signaling long before submitting his design for patenting:

…Some enthusiasts have expressed their belief that telephony to any distance by induction through the air is possible. I cannot stretch my imagination so far, but I do firmly believe that it is practi- cable to disturb by means of powerful machines the electrostatic condition of the earth and thus transmit intelligible signals and perhaps power.[9]

The physics of Tesla's wireless transmission system is, in its basic form, is electrostatic induction. . (See Figure 3)

Instead of a charged body inducing an opposite charge on an uncharged body, as in the standard text book illustration, both the transmitter and receiver contain charge that establishes a field of force between the two. By oscillating these two bodies of bound charge at the same frequency, it is possible to signal between two points

Figure 3


In order to differentiate Tesla's wireless method from contemporary understanding of the technique, and from the misunderstandings arising from the chronology of Tesla's research into the nature of electrical communication, his method is contrasted with modern patents for electrostatic submarine communication and the inventor's earlier work in this field.

Contemporary Patents

L. Gilstrap's patent for an Electrostatic Communication System (see Figure 4), #3,964,051, issued June 15, 1976, describes a device

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