File:William Robinson (1840-1921).jpg
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William_Robinson_(1840-1921).jpg (357 × 441 pixels, file size: 137 KB, MIME type: image/jpeg)
William_Robinson_(1840-1921).jpg (357 × 441 pixels, file size: 137 KB, MIME type: image/jpeg)
DescriptionWilliam Robinson (1840-1921).jpg |
English: Photograph of William Robinson (1840-1921), American inventor and engineer. Invented the railroad track circuit in 1872. |
Date |
before 1921 date QS:P,+1921-00-00T00:00:00Z/7,P1326,+1921-00-00T00:00:00Z/9 |
Source | "The Invention of the Track Circuit." American Railway Association, New York, USA, 1922. p. 58. |
Author | Unknown authorUnknown author |
Public domainPublic domainfalsefalse |
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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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:13, 11 November 2011 | ![]() | 357 × 441 (137 KB) | Caseyjonz (talk | contribs) | == Summary == {{Information |Description={{en|1=Photograph of {{w|William Robinson (inventor)|William Robinson}} (1840-1921), American inventor and engineer. Invented the railroad {{track circuit}} in 1872.}} |Source=[http://www.archive.org/details/invent |
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