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File:Gramme Ring - 4 coil.svg

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Drawing based on w:Image:Gramme Ring - 4 coil.png. Description from there:

A four coil Gramme ring. The coils of A and A' sum together as do the coils of B and B', producing two pulses of power 90 degrees out of phase with each other. When coils A and A' are at maximum output, coils B and B' are at zero output.

Public Domain source: 

   * Hawkins Electrical Guide, Volume 1
   * Chapter 14: The Dynamo: Current Commutation
   * Page 177, Figure 185
   * 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.

Scanned by Dale Mahalko, Gilman, WI, USA
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Other versions Original: w:Image:Gramme Ring - 4 coil.png
 
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current19:30, 31 March 2008Thumbnail for version as of 19:30, 31 March 2008720 × 419 (54 KB)BorbFixed background.
19:29, 31 March 2008Thumbnail for version as of 19:29, 31 March 2008720 × 419 (54 KB)Borb{{Information |Description=Drawing based on w:Image:Gramme Ring - 4 coil.png. Description from there: A four coil Gramme ring. The coils of A and A' sum together as do the coils of B and B', producing two pulses of power 90 degrees out of phase with

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