Image:Drum Wound Armature - Single Coil Example.jpg

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[edit] Summary

Text from original illustration:

Figure 251: Illustrating the principle of an early Siemens drum winding.

In order to make the winding and connections clear, one coil and the commutator is shown assembled, although the latter is not put in place until after all the coil sections have been wound, with the ends of the wires being temporarily twisted together until all can be soldered to the commutator risers.
The cores of these early machines were made of wood, overspun circumferentially with iron wire before receiving the logitudinal copper windings.

Public Domain source:

Hawkins Electrical Guide, Volume 1
Chapter 17: The Armature, Page 226.
Copyright 1917 by Theo. Audel & Co.
Printed in the United States

Scanned by Dale Mahalko, Gilman, WI, USA

DMahalko (talk) 09:54, 13 January 2008 (UTC)

[edit] Licensing

This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1923 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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	Date/Time	Dimensions	User	Comment
current	09:54, 13 January 2008	1,933×1,313 (103 KB)	DMahalko (Talk \| contribs)	(== Summary == Text from original illustration: Figure 251: Illustrating the principle of Siemens drum winding. In order to make the winding and connections clear, one coil and the commutator is shown assembled, although the latter is not put in place unt)