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File:Dynamo - commutating plane definitions.jpg

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Description
English: Dynamo - commutating plane definitions
Date
Source

Public Domain source:

Author

Theo. Audel & Co.

Photographed, reduced to grayscale, and saved as a PNG by Dale Mahalko, Gilman, WI

Licensing

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
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.

Original upload log

The original description page was here. All following user names refer to en.wikipedia.
  • 2007-09-15 01:41 DMahalko 598×625× (114931 bytes) This is from the 1917 Hawkins Electrical Guide, page 264-265 of volume 1. Photographed, reduced to grayscale, and saved as a PNG by me. Dale Mahalko, Gilman, WI Source and copyright information: {| | [[Image:1917 Hawkins Electrical Guide

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Date/TimeThumbnailDimensionsUserComment
current23:10, 6 February 2012Thumbnail for version as of 23:10, 6 February 2012598 × 625 (144 KB)Jbartaminor cleanup
01:20, 18 November 2008Thumbnail for version as of 01:20, 18 November 2008598 × 625 (112 KB)File Upload Bot (Magnus Manske) {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|TBD '''Public Domain''' source: * Hawkins Electrical Guide, Volume 1 * Chapter 20: Commutation and the Commutator, Page 284 * Copyright 1917 by Theo. Audel & Co. * Printed in the United S

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