What is the Role of the Slip Rings and Brushes in the Electrical Gadgets?
Generators and Dynamos
Brush (electric) - Wikipedia
Generator Brushes on a White Background Spare Parts for the Starter To the Car on a White Background Stock Photo - Image of automobile, frame: 56719916
VW Beetle Splitscreen 6 volt Dynamo Generator Brushes 111903515C 6V | eBay