Brush holder for fractional horsepower motors

Details Brush holder for fractional horsepower motors Brush holder for fractional horsepower motors

1979-07-05

1982-07-20

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68R, 310 51, 310 71, H02K 1300

Patent

active

043408311

ABSTRACT:
A brush holder mechanism for electric motors, especially the fractional horsepower commutator-equipped motors of workshop power tools. In order to prevent failure of the tool due to jamming of the carbon brushes in their holders, the brush holder according to the invention provides that the brush holder casing in which the carbon brush moves has smooth, flat and uninterrupted interior surfaces and the casing is constructed of a single piece of metal or a single piece of metal on which a continuous cover plate is attached. The integral construction of the casing insures that the casing is not deformed during manufacture or assembly, in particular by the bending of parts of the casing into fastening tabs and the like. In the brush holder according to the invention, the fastening means are integral with the cover plate or the casing. In other embodiments, the casing is held in a receiver by clamps and screws. The electrical connection between the brush and the electrical supply cable is made by plug-in components, for example a plug-in cover plate which also provides support for the brush spring. A number of embodiments is presented.

REFERENCES:
patent: 1706255 (1929-03-01), Richard
patent: 2334722 (1943-11-01), Mirick
patent: 2947895 (1960-08-01), Wray
patent: 3226585 (1965-12-01), Roe
patent: 3441766 (1969-04-01), Amrein
patent: 3842302 (1974-10-01), Apostoleris
patent: 3867659 (1975-02-01), Seaburg
patent: 3967148 (1976-06-01), Walsh
patent: 4155023 (1979-05-01), Hagenlocher

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