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File:US Patent 714756-John Stone Stone-Method of selective electric signaling 1900 figs 5&6.png

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US_Patent_714756-John_Stone_Stone-Method_of_selective_electric_signaling_1900_figs_5&6.png (574 × 304 pixels, file size: 29 KB, MIME type: image/png)

Summary

Description
English: American engineer John Stone Stone's radiotelegraphy communication system, from his 1900 patent. On the left is the spark gap transmitter, which transmits pulses of radio waves when the telegraph key (k) is pushed. On the right is the coherer receiver, with a telegraph sounder (R) which produced clicks when the pulses of radio waves were received. Stone's system is important historically because it is one of the first inductively coupled radio systems and was involved in a litigation with Guglielmo Marconi ending in a famous 1943 Supreme Court decision. The zigzag lines labeled I1 and I2 are the windings of the transformers.
Date
Source Retrieved 27 May 2018 from US patent 714756A, John Stone Stone, Method of selective electric signaling, filed: 8 February 1900, granted: 2 December 1902 on Google Patents
Author John Stone Stone

Licensing

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:US_Patent_714756-John_Stone_Stone-Method_of_selective_electric_signaling_1900_figs_5%266.png

Captions

Radio transmitter and receiver circuits invented by John Stone Stone in 1900

8 February 1900Gregorian

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current17:14, 6 August 2018Thumbnail for version as of 17:14, 6 August 2018574 × 304 (29 KB)ChetvornoUser created page with UploadWizard

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