Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
An electric motor brush assembly comprising a hollow elongated brush holder for slidably receiving and guiding a commutator brush along a rectilinear path, said holder being formed with an elongated slot parallel and adjacent to said path, the end of said slot remote from the commutator being closed, said slot having a widened portion near the closed end thereof, a symmetrical coil spring having a main body portion and, at each end thereof, a reduced diameter neck portion followed by an enlarged knob-shaped terminal portion, said knob-shaped portion being of less diameter than said widened portion of said slot but of greater diameter than the remaining portion thereof, adjacent turns of all portions of said spring being substantially in contact with each other when said spring is in relaxed condition, the reduced diameter neck portion of said spring extending through and slidably retained in said slot, the main body portion of said spring being disposed outside said holder in flexually stressed condition, and the knob-shaped terminal portions being disposed within said holder and respectively bearing against the closed end of said slot and said brush.
Claim 2
Dependent Claim
185 words
An electric motor brush assembly comprising a hollow elongated brush holder for slidably receiving and guiding a commutator brush along a rectilinear path, said holder being formed with an elongated slot parallel and adjacent to said path, the end of said slot remote from the commutator being closed, said slot having a widened portion near the closed end thereof, a symmetrical coil spring having a main body portion and, at each end thereof, a reduced diameter neck portion followed by an enlarged knob-shaped terminal portion, said knob-shaped portion being of less diameter than said widened portion of said slot but of greater diameter than the remaining portion thereof, adjacent turns of all portions of said spring being substantially in contact with each other when said spring is in relaxed condition, the reduced diameter neck portion of said spring extending through and slidably retained in said slot, the main body portion of said spring being disposed outside said holder in flexually stressed condition, and the knob-shaped terminal portions being disposed within said holder and respectively bearing against the closed end of said slot and said brush.
Claim 3
Dependent Claim
29 words
Brush holder as claimed in claim 1, wherein the main body portion of said coil spring is longer than the distance between the near and far ends of slot.
Claim 4
Dependent Claim
31 words
Brush holder as claimed in claim 1, wherein the holder is an open-ended tubular member of plastic having a bore, the cross-section of which geometrically matches the cross-section of the brush.
Claim 5
Dependent Claim
29 words
Brush holder as claimed in claim 3, wherein the brush has a shunt wire and means are provided for electrical connection thereof outside the open-ended tubular member of plastic.
Claim 6
Dependent Claim
48 words
Brush holder as claimed in claim 1 wherein the brush has a commutator and the like contacting end and a rear end and, the distance between these is less than the distance between the commutator and the like end and the short wider portion of the slot-like track.
Claim 7
Dependent Claim
35 words
Brush holder as claimed in claim 1, wherein the distance between the near and far ends of the slot is shorter than the flexurally unstrained length of the main body portion of the coil spring.