File:Gramme Ring Armature - Minimal Core Penetration.jpg
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Summary
| Description |
English: Original text from illustration:
Figure 250: Distribution of magnetic lines of force through a Gramme ring. Since the metal of the ring furnishes a path of least reluctance, most of the magnetic lines will follow the metal of the ring and very few will penetrate into the aperture of the interior. This condition causes a serious defect in the action of ring armature armatures rendering the winding around the interior useless for the production of electromotive force. Hence, in ring armatures only about half of the winding is effective, the rest being "dead wire", adding its resistance to the circuit, thus decreasing the efficiency of the machine. |
| Source |
Public Domain source:
Scanned by Dale Mahalko, Gilman, WI, USA DMahalko (talk) 09:18, 13 January 2008 (UTC) |
| Author | Unknown author |
Licensing
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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.
 Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings. |
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 2008-01-13 09:18 | 2101×1389× (90708 bytes) | DMahalko | == Summary == Original text from illustration: Figure 250: Distribution of magnetic lines of force through a Gramme ring. Since the metal of the ring furnishes a path of least reluctance, most of the magnetic lines will follow the metal of the ring and v |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:16, 12 February 2019 | | 2,101 × 1,389 (89 KB) | wikimediacommons>Betelgeuse1960 | Transferred from en.wikipedia via #commonshelper |
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