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US 4,059,776 AGranted
Electric motor brush mounting
AssigneeStackpole Carbon Company
InventorsRobert E. Schreiber, Edward J. Zelt
Life of this patent
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AssigneeStackpole Carbon Company
InventorsRobert E. Schreiber, Edward J. Zelt
Estimating the term…
An electric motor frame has a brush-receiving recess beside the commutator. The recess has top and bottom walls and an insulating brush housing is disposed in the recess where it is held in fixed position. Slidable lengthwise in the housing is a brush, between one side of which and the housing there is a stationary metal strip that extends substantially full length of the housing and has an outer end portion extending transversely of the brush. Compressed between this end portion of the strip and the brush is a coil spring that holds the brush against the commutator. An electrical conductor engages the strip, while a flexible wire electrically connects the strip with the brush. The brush housing is provided with at least one exterior rib extending lengthwise of it, and one of the walls of the frame recess has a groove in it that snugly receives the rib to accurately position the housing in the frame.
In an electric motor having a frame and a commutator rotatably mounted therein, the frame having a brush-receiving recess beside the commutator provided with top and bottom walls, a brush housing made of insulating material disposed in said recess, means holding said housing in fixed position in the recess, a brush disposed in the housing and slidable lengthwise thereof, a stationary metal strip inside the housing between the brush and one side of the housing, the strip extending substantially full length of the housing and having an outer end portion extending transversely of the brush and spaced therefrom, one side of the strip engaging the brush and the other side of the strip engaging the housing, a coil spring compressed between said end portion and the brush for holding the brush against the commutator, a flexible wire electrically connecting the brush with said end portion of the strip, and an electrical conductor engaging said strip.
In an electric motor having a frame and a commutator rotatably mounted therein, the frame having a brush-receiving recess beside the commutator provided with top and bottom walls, a brush housing made of insulating material disposed in said recess and having a rectangular passage therein, means holding said housing in fixed position in the recess, a rectangular brush disposed in the housing passage and slidable lengthwise thereof with three sides of the brush engaging the housing, a stationary metal strip inside the housing between the brush and one side of the housing, the strip extending substantially full length of the housing and having an outer end portion extending transversely of the brush and spaced therefrom, one side of the strip engaging the fourth side of the brush and the other side of the strip engaging the housing, a coil spring compressed between said end portion and the brush for holding the brush against the commutator, a flexible wire electrically connecting the brush with said end portion of the strip, and an electrical conductor engaging said strip.
Dependencies are inferred from the claim text.