US3955113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush holder with means for limiting travel of brush spring
Assignee: SPX Technologies Inc
•
Filing: 1974-11-27
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Granted: 1976-05-04
•
Expires: 1994-11-27
Abstract
Abstract The invention comprises a motor brush holder assembly including a brush holder member and a brush member which is free for reciprocal longitudinal motion in said brush holder. The assembly includes captured brush spring means for urging longitudinal motion of the brush in one direction. The configuration of the holder is such as to confine the brush spring within the holder. The brush spring confining means may include a planar member between the spring and the brush. The cross section of the interior of the holder may exceed that of the brush; or a portion of either the planar member, or of the brush spring, may project through a slot of the brush holder which does not extend the full length of the holder. By this means there is an assurance that the brush spring cannot project beyond the front of the brush holder and make contact with the commutator.
Inventors
- 👤 Michael John Hillyer
- 👤 Christian Raymond Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:22
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A commutator brush assembly comprising in combination; a a brush; b a brush holder having a first section for retaining and confining said brush for reciprocal longitudinal motion with respect to said brush holder; c spring means captured within a second section of said brush holder and co-acting with one end of said brush for urging the other end of said brush to project from said brush holder when said brush is assembled in said first section of said brush holder; and d retaining means comprising a bent tab section of said brush holder for limiting the maximum extension of said spring means.
Claim 2
Dependent Claim
103 words
A commutator brush assembly comprising in combination; a a brush; b a brush holder having a first section for retaining and confining said brush for reciprocal longitudinal motion with respect to said brush holder; c spring means captured within a second section of said brush holder and co-acting with one end of said brush for urging the other end of said brush to project from said brush holder when said brush is assembled in said first section of said brush holder; and d retaining means comprising a bent tab section of said brush holder for limiting the maximum extension of said spring means.
Claim 3
Dependent Claim
130 words
An improved brush holder assembly for use with an electric motor or generator and comprising in combination: a a longitudinal brush holder member open at one end and having closure means at the other end; b a brush member disposed within said brush holder and guided for longitudinal reciprocal motion with respect to said brush holder and extending through said one open end; c spring means disposed within said brush holder between said other end thereof and the brush member for urging said brush member towards said open end; and wherein d said brush holder includes limiting means comprising a bent over tab portion of said brush holder for restricting the longitudinal excursion of said spring means towards said open end without restricting the longitudinal excursion of said brush member.
Claim 4
Dependent Claim
130 words
An improved brush holder assembly for use with an electric motor or generator and comprising in combination: a a longitudinal brush holder member open at one end and having closure means at the other end; b a brush member disposed within said brush holder and guided for longitudinal reciprocal motion with respect to said brush holder and extending through said one open end; c spring means disposed within said brush holder between said other end thereof and the brush member for urging said brush member towards said open end; and wherein d said brush holder includes limiting means comprising a bent over tab portion of said brush holder for restricting the longitudinal excursion of said spring means towards said open end without restricting the longitudinal excursion of said brush member.
Claim 5
Dependent Claim
70 words
The combination as set forth in claim 2, wherein a cross section of said brush holder taken normal to the longitudinal axis thereof would constitute the outer perimeter of a rectangle superimposed on a circle and wherein the diameter of the circle has a magnitude between that of the two legs of the rectangle and wherein said tab portion is bent inward from the circle portion of said cross section.
Claim 6
Dependent Claim
22 words
The combination as set forth in claim 3 and wherein said tab portion does not infringe on the boundaries of said rectangle.
Claim 7
Dependent Claim
54 words
The combination as set forth in claim 2 and wherein said brush member has a longitudinal slot situated to permit longitudinal motion of said brush means past said tab portion and wherein said spring means is a coil spring having a diameter which prevents its longitudinal motion towards said one end past said tab.
Claim 8
Dependent Claim
156 words
An improved brush holder assembly for use with an electric motor or generator and comprising in combination: a a longitudinal brush holder member open at one end and having closure means at the other end; b a brush member disposed within said brush holder and guided for longitudinal reciprocal motion with respect to said brush holder and extending through said one open end; c spring means disposed within said brush holder between said other end thereof and the brush member for urging said brush member towards said open end; d said brush holder member having a wall with a longitudinal slot extending from said other end towards, but not to, said one end; and wherein e said spring means has an ear formed thereon and extending through said slot for cooperating with said slot to restrict the longitudinal excursion of said spring means towards said open end without restricting the longitudinal excursion of said brush member.
Claim 9
Dependent Claim
156 words
An improved brush holder assembly for use with an electric motor or generator and comprising in combination: a a longitudinal brush holder member open at one end and having closure means at the other end; b a brush member disposed within said brush holder and guided for longitudinal reciprocal motion with respect to said brush holder and extending through said one open end; c spring means disposed within said brush holder between said other end thereof and the brush member for urging said brush member towards said open end; d said brush holder member having a wall with a longitudinal slot extending from said other end towards, but not to, said one end; and wherein e said spring means has an ear formed thereon and extending through said slot for cooperating with said slot to restrict the longitudinal excursion of said spring means towards said open end without restricting the longitudinal excursion of said brush member.
Claim 10
Dependent Claim
120 words
A commutator brush assembly comprising in combination: a a brush; b a brush holder having a first section for retaining and confining said brush for reciprocal longitudinal motion with respect to said brush holder; c spring means captured within a second section of said brush holder and co-acting with one end of said brush for urging the other end of said brush to project from said brush holder when said brush is assembled in said first section of said brush holder; and d retaining means including: 1. a wall of said brush holder having a longitudinal slot; and 2. an ear formed on said spring means for cooperating with said slot to limit the maximum extension of said spring means.
Claim 11
Dependent Claim
120 words
A commutator brush assembly comprising in combination: a a brush; b a brush holder having a first section for retaining and confining said brush for reciprocal longitudinal motion with respect to said brush holder; c spring means captured within a second section of said brush holder and co-acting with one end of said brush for urging the other end of said brush to project from said brush holder when said brush is assembled in said first section of said brush holder; and d retaining means including: 1. a wall of said brush holder having a longitudinal slot; and 2. an ear formed on said spring means for cooperating with said slot to limit the maximum extension of said spring means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |