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Brush holder and brush assembly for a dynamoelectric machine

  • US 4,112,321 A
  • Filed: 07/26/1977
  • Issued: 09/05/1978
  • Est. Priority Date: 07/26/1977
  • Status: Expired due to Term
First Claim
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1. A brush holder and brush assembly for a dynamoelectric machine, said holder comprising a moulded, one-piece member of electrical insulating material having an opening therein adapted to receive a rotating part of the machine that is adapted to be contacted by electrical current carrying brushes, said member including at least two oppositely disposed brush holding housings, each of said housings having an end wall remote from the aforesaid opening and being open on two opposite sides thereof, each of said housings also having two spaced apart side walls facing each other and extending from said end wall thereof, each of said housings also having a second end opposite said end wall, said second end being open and opening into the aforesaid opening adapted to receive said rotating part of said machine, each of said side walls of each of said housings having inwardly projecting ribs extending from adjacent one end wall of the said housing to adjacent the other end of the housing, an electrical current carrying brush mounted in each of said housings, each said brush having side walls with recesses therein into which said ribs extend, thereby providing tracks for guiding said brushes as they move longitudinally in said housings, said brushes bearing against said side walls of said housings, spring means located within said housings between said end walls thereof and said brushes and biasing said brushes into the opening in said member that is adapted to receive said rotating part of said machine, each of said housings also including a finger located adjacent one of said open sides of said housing and formed integral with said member, said finger and said ribs of each said housing contacting said spring in said housing and serving to prevent said spring from falling out of said housing through said open sides thereof.

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