File:US&S Model 14 pwr interlocking w model board bulletin 100.jpg
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| Description |
English: View of Model 14 power interlocking machine |
| Date | |
| Source | 100. p. 72. |
| Author | Union Switch & Signal Co., Swissvale, Pennsylvania, USA |
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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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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 | |
|---|---|---|---|---|---|
| current | 23:05, 1 May 2011 | | 474 × 556 (239 KB) | Caseyjonz (talk | contribs) | == Summary == {{Information|Description={{en|1=View of Model 14 power interlocking machine}} |Source= [http://books.google.com/books?id=BAoqAQAAIAAJ&pg=PA171#v=onepage&q&f=false "The Type 'F' Electric Interlocking Sys |
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