Figure 339 -- Contact angle for the different types of brush

• Sheet/laminated copper brushes use tangential contact as at A
• Wire and mesh/gauze brushes use an inclined contact as at B
• Carbon brushes are placed radially as at C when in box holders
• Carbon brushes are inclined opposite to the direction of rotation as at D when used with reaction holders

• Hawkins Electrical Guide, Volume 1
• Chapter 21: Brushes and the Brush Gear
• Page 312, Figure 339
• Copyright 1917 by Theo. Audel & Co.
• Printed in the United States

• Scanned by User:DMahalko, Dale Mahalko, Gilman, WI, USA -- Email: dmahalko@gmail.com, on 21:08, 18 May 2008 (UTC)
• Scanned at 600dpi, 8-bit grayscale using MicroTek ScanMaker 3600
• Level-adjusted and cleaned up using Gimp 2.4.4

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

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