Brush assembly for electric commutator motors

Details Brush assembly for electric commutator motors Brush assembly for electric commutator motors

1987-04-14

1988-12-13

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310229, 310230, 310249, H02K 1300

Patent

active

047913312

ABSTRACT:
The contact surface (8') is constantly urged against the commutator (9) by spring means. The brush material is progressively worn away, without changing the shape of the contact surface (8'), owing to the rotation of the commutator (9). A cylindrical slot (17) separates the outer portion (5') of the brush body (5) from the inner portion (5b) thereof. Thus, the contact surface (8') is kept separated from the cylindrical portion (16') of the outer surface of the brush body as long as the brush material is not worn away to reach the merging zone of the portions (5a) and (5b) of the brush body. This allows a substantial limitation of the risk of sparking between the brush body and the commutator to be achieved, thus avoiding deposit of a carbon layer onto the peripheral surface of the commutator.

REFERENCES:
patent: 731740 (1903-06-01), Bassett
patent: 2029171 (1936-01-01), Lundquist
patent: 2481499 (1949-09-01), Collura
patent: 2545365 (1951-03-01), Lang

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