File:US Patent 714756-John Stone Stone-Method of selective electric signaling 1900 figs 5&6.png
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)
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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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In general, the contents of United States patents are in the public domain.
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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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:14, 6 August 2018 | | 574 × 304 (29 KB) | Chetvorno | User created page with UploadWizard |
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