File:Gramme Ring - Four Pole Stator Field Flow.jpg

Summary
Text from original diagram:

Figure 299: Distribution of magnetic lines through solid drum armature of a four pole machine.

Public Domain source:
 * Hawkins Electrical Guide, Volume 1
 * Chapter 19: Theory of the Armature, Page 281
 * Copyright 1917 by Theo. Audel & Co.
 * Printed in the United States

Scanned by Dale Mahalko, Gilman, WI, USA

DMahalko (talk) 10:41, 13 January 2008 (UTC)