File:Gramme Ring - 2 coil - 1 pole.png

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English: A one pole, two coil Gramme ring. The second coil is wired in series with the first and the voltage of both is added together.

Public Domain source:

  • Hawkins Electrical Guide, Volume 1
  • Chapter 14: The Dynamo: Current Commutation
  • Page 175, Figure 183.
  • Copyright 1917 by Theo. Audel & Co.
  • Printed in the United States
For a list of all these illustrations used in Wikipedia please see the article w:Hawkins Electrical Guide.
Source Scanned by Dale Mahalko, Gilman, WI, USA
Author DMahalko (talk) 21:10, 12 January 2008 (UTC)
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current21:10, 12 January 2008Thumbnail for version as of 21:10, 12 January 20081,249 × 538 (32 KB)DMahalko (talk | contribs)== Summary == Separate excitation of an electric generator. DC generator with commutation is shown, but the principle also applies to AC alternators. '''Public Domain''' source: * Hawkins Electrical Guide, Volume 1, Page 175. * Copyright 1917 by Theo. Au

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