US3716735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical brush assembly
Assignee: Stackpole Carbon Co
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Filing: 1971-08-25
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Granted: 1973-02-13
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Expires: 1991-08-25
Abstract
Abstract An electric brush is slidably disposed in the socket of a holder, with a spring compressed between the inner ends of the brush and socket. The side of the brush has a recess near its inner end beside an opening in the holder. Extending into this recess is the free end of a tongue that is joined to the holder to hold the brush retracted against the pressure of the spring. A similar brush arrangement is spaced far enough from the one just described for an armature or the like to be inserted between the brushes without touching them. Then the tongues are bent out of the brush recesses so that the springs can expand and move the brushes into engagement with the armature.
Inventors
- 👤 W Dippold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:15
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/40; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148; H02K2205/00; H02K2205/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
An electrical brush assembly comprising a holder provided with a socket, a brush slidably disposed in the socket and having an outer end adjacent the open end of the socket, a spring in the socket compressed between the inner ends of the brush and socket, the side of the brush having a recess therein near its inner end and the holder having an opening beside the recess, and a tongue joined to the holder and having a free end extending through said holder opening and into said brush recess to hold the brush retracted in the holder against the pressure of the spring, said tongue and holder opening being formed by a struck-out piece of the side of the holder, and said tongue being bendable outwardly to remove its free end from said recess so that the spring can expand and move the brush farther away from the inner end of the socket.
Claim 2
Dependent Claim
153 words
An electrical brush assembly comprising a holder provided with a socket, a brush slidably disposed in the socket and having an outer end adjacent the open end of the socket, a spring in the socket compressed between the inner ends of the brush and socket, the side of the brush having a recess therein near its inner end and the holder having an opening beside the recess, and a tongue joined to the holder and having a free end extending through said holder opening and into said brush recess to hold the brush retracted in the holder against the pressure of the spring, said tongue and holder opening being formed by a struck-out piece of the side of the holder, and said tongue being bendable outwardly to remove its free end from said recess so that the spring can expand and move the brush farther away from the inner end of the socket.
Claim 3
Dependent Claim
153 words
An electrical brush assembly comprising a holder provided with a socket, a brush slidably disposed in the socket and having an outer end adjacent the open end of the socket, a spring in the socket compressed between the inner ends of the brush and socket, the side of the brush having a recess therein near its inner end and the holder having an opening beside the recess, and a tongue joined to the holder and having a free end extending through said holder opening and into said brush recess to hold the brush retracted in the holder against the pressure of the spring, said tongue and holder opening being formed by a struck-out piece of the side of the holder, and said tongue being bendable outwardly to remove its free end from said recess so that the spring can expand and move the brush farther away from the inner end of the socket.
Claim 4
Dependent Claim
153 words
An electrical brush assembly comprising a holder provided with a socket, a brush slidably disposed in the socket and having an outer end adjacent the open end of the socket, a spring in the socket compressed between the inner ends of the brush and socket, the side of the brush having a recess therein near its inner end and the holder having an opening beside the recess, and a tongue joined to the holder and having a free end extending through said holder opening and into said brush recess to hold the brush retracted in the holder against the pressure of the spring, said tongue and holder opening being formed by a struck-out piece of the side of the holder, and said tongue being bendable outwardly to remove its free end from said recess so that the spring can expand and move the brush farther away from the inner end of the socket.
Claim 5
Dependent Claim
122 words
An electrical brush assembly according to claim 1, in which the central part of said tongue is arched away from the holder to provide an opening therebetween for insertion of an instrument to remove the free end of the tongue from the brush recess, said assembly including a like holder and spring and tongue and retracted recessed brush disposed in alignment with the first-mentioned holder with the outer ends of the retracted brushes facing each other and spaced apart far enough to freely receive a rotatable current collector between them, and a plate secured to said holders and supporting them, whereby removal of said tongues from the brush recesses will permit the brushes to be moved by said springs toward each other.
References Cited (Backward Citations)
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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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |