File:Syphon recorder mechanism 1922.png
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Syphon_recorder_mechanism_1922.png (503 × 562 pixels, file size: 25 KB, MIME type: image/png)
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Summary
[edit]DescriptionSyphon recorder mechanism 1922.png |
English: A diagram of the operating mechanism of a syphon recorder, an antique device used in telegraph stations during the late 1800s to the early 1900s to record incoming telegraph messages on paper tape. It functions on the principle of a D'Arsonval galvanometer. The telegraph signal current passes through a coil of wire suspended between the poles of a permanent magnet. The pulses of current representing "dots" and "dashes" of Morse code create a torque that causes the coil to rotate slightly about its vertical suspension. It is attached by two wires to the metal plate syphon support, which causes the metal plate to pivot about its horizontal axis suspension of thread. This swings the glass syphon tube which hangs down from the plate across the paper tape, making a pulse representing the Morse code "dot" or "dash" on the tape. A transcriber later reads the tape, translating the Morse code dots and dashes into characters spelling out the text message. |
Date | |
Source | Retrieved August 4, 2016 from Weinberger, Julius, "The recording of high speed signals in radio telegraphy" in Proc. of the I.R.E, Institute of Radio Engineers, New York, Vol. 10, No. 3, June, 1922, p. 187, fig. 5 on Google Books |
Author | Julius Weinberger |
Licensing
[edit]Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:33, 1 September 2016 | 503 × 562 (25 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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Horizontal resolution | 28.35 dpc |
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Vertical resolution | 28.35 dpc |
File change date and time | 04:10, 1 September 2016 |
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