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  • Electronics and Electrical Engineering
  • SPACE SCIENCES
  • ddc:330
  • 2020-2023
  • 2005-2009
  • 1960-1964
  • 1940-1944  (1)
  • 1944  (1)
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  • 2020-2023
  • 2005-2009
  • 1960-1964
  • 1940-1944  (1)
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  • 1
    facet.materialart.
    Unknown
    Determination of the Actual Contact Surface of a Brush Contact (1944)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The number of partial contact surfaces of a brush-ring contact is measured by means of a statistical method. The particular brush is fitted with wicks - that is, insulated and cemented cylinders of brush material, terminating in the brush surface. The number of partial contact surfaces can be computed from the length of the rest periods in which such wicks remain without current. Resistance measurements enable the determination of the size of the contact surfaces. The pressure in the actual contact surface of a recently bedded brush is found to be not much lower than the Brinell hardness of the brush.
    Keywords: Electronics and Electrical Engineering
    Type: NACA-TM-1071 , Wissenschaftliche Veroffentlichungen aus den Siemens-Werken; 17; 4; 43-47
    Format: application/pdf
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