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File:Syphon recorder output.png

Syphon_recorder_output.png (600 × 110 pixels, file size: 11 KB, MIME type: image/png)

Summary

Description
English: Recording of a telegraph message from an underwater submarine telegraph cable on paper tape by a syphon recorder from around 1900. The poor transmission quality of early telegraph cables distorted the signal, making the current pulses representing "dots" and "dashes" of the Morse code very difficult to read.
Date
Source Edward M. Byrn (1900) The Progress of Invention in the 19th Century, Munn and Co., New York, Sec. 4, p. 36, fig. 16 archived on Project Gutenberg
Author

Edward W. Byrn

(Life time: Not known)


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:Syphon_recorder_output.png

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Public domain
Public domain
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.
United States
United States
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Date/TimeThumbnailDimensionsUserComment
current12:25, 9 December 2013Thumbnail for version as of 12:25, 9 December 2013600 × 110 (11 KB)Mumiemonstret{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|Illustration of output from the Syphon recorder used for recording the very weak telegraph signals transmitted through the first transatlantic cables.}} |Source = '''Original p...

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