Electric brush - a connector used between fixed and moving conductors, to facilitate electrical contact and pass electrical signal or current between the parts of the given circuit.

A pair of new carbon brushes for a small universal motor

^{S. Zurek, E-Magnetica.pl, CC-BY-4.0}

Electric brushes are used most frequently on commutators or slip rings, as well as in autotransformers. Depending on the material and construction of the brush there can be: carbon brush, copper brush, wire brush, etc.

Electric brush on the exposed part of the winding of a toroidal autotransformer

^{S. Zurek, E-Magnetica.pl, CC-BY-4.0}

Electric brushes mounted in universal motor, on a commutator

^{S. Zurek, E-Magnetica.pl, CC-BY-4.0}

Worn out carbon brushes from a DC generator

^{S. Zurek, E-Magnetica.pl, CC-BY-4.0}

• Commutator
• Slip ring
• Autotransformer
• Alternator