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World Wireless System
The World Wireless System was a turn of the 19th century proposed telecommunications and electrical power delivery system designed by inventor Nikola Tesla based on his theories of using Earth and its atmosphere as electrical conductors. Tesla claimed this system would allow for "the transmission of electric energy without wires" on a global scale〔."〕 as well as point-to-point wireless telecommunications and broadcasting. He made public statements citing two related methods to accomplish this from the mid-1890s on. By the end of 1900 Tesla had convinced banker J. P. Morgan to finance construction of a wireless station (eventually sited at Wardenclyffe) based on his ideas intended to transmit messages across the Atlantic to England and to ships at sea. Almost as soon as the contract was signed Tesla decided to scale up the facility to include his ideas of terrestrial wireless power transmission to better compete with Guglielmo Marconi's radio based telegraph system.〔(Marc J. Seifer, Nikola Tesla: The Lost Wizard, from: ExtraOrdinary Technology (Volume 4, Issue 1; Jan/Feb/Mar 2006) )〕 Morgan refused to fund the changes and, when no additional investment capital became available, the project at Wardenclyffe was abandoned in 1906, never to become operational.
During this period Tesla filed numerous patents associated with the basic functions of his system, including transformer design, transmission methods, tuning circuits, and methods of signaling. He also described a plan to have some thirty Wardenclyffe-style telecommunications stations positioned around the world to be tied into existing telephone and telegraph systems. Tesla would continue to elaborate to the press and in his writings for the next few decades on the system's capability's and how it was superior to radio-based systems.
Despite Tesla's claims that he had "carried on practical experiments in wireless transmission"〔Electrocraft - Volume 6 - 1910, Page 389〕 there is no documentation he ever transmitted power beyond relatively short distances, and modern scientific opinion is generally that his wireless power scheme would not have worked.
==History==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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