Summary

Illustration Description

Figure 329-332 -- Various forms of brush

• Fig 329 - gauze brush
• Fig 330 - laminated or strip brush
• Fig 331 - strip and wire brush as used on early Edison machines
• Fig 332 - carbon brush

Carbon is preferred to copper for brushes, on account of the reduction of sparking secured by its use.

Public Domain Source

• Hawkins Electrical Guide, Volume 1
• Chapter 21: Brushes and the Brush Gear
• Page 304, Figures 329, 330, 331, 332
• Copyright 1917 by Theo. Audel & Co.
• Printed in the United States

Upload Notes

• Scanned by User:DMahalko, Dale Mahalko, Gilman, WI, USA -- Email: dmahalko@gmail.com, on 19:12, 18 May 2008 (UTC)
• Scanned at 600dpi, 8-bit grayscale using MicroTek ScanMaker 3600
• Level-adjusted and cleaned up using Gimp 2.2

See Also

For a list of all these illustrations used in Wikipedia please see the article Hawkins Electric Guide on the English Wikipedia.

Licensing

	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
	This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.