File:Gramme Ring Armature - Early Form.jpg
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Summary
| Description |
English: Text from original page:
Figure 248: Early form of Gramme ring armature, the core being shown cut through, and some of the coils displaced to make it clearer. The core, F, consists of a quantity of iron wire wound continuously to form a ring of the shape shown by the section. Over this is wound about thirty coils of insulated copper wire, B C D, etc, the direction of the winding of each being the same, and their adjacent end connected together. The commutator segments consist of a corresponding number of brass angle pieces, m n, which are fixed against the wooden boss, o, carried on the driving shaft. The junction of every two adjacent cells is connected to one of the commutator segments, as shown at n. |
| Source |
Public Domain source:
Scanned by Dale Mahalko, Gilman, WI, USA DMahalko (talk) 08:44, 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 08:44 | 1298×1249× (87196 bytes) | DMahalko | == Summary == Text from original page: Figure 248: Early form of Gramme ring armature, the core being shown cut through, and some of the coils displaced to make it clearer. The core, F, consists of a quantity of iron wire wound continuously to form a rin |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:16, 12 February 2019 | | 1,298 × 1,249 (85 KB) | Betelgeuse1960 | Transferred from en.wikipedia via #commonshelper |
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