US3760211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiring connection to a brush assembly in a dynamo electric machine
Assignee: ZF International UK Ltd
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Filing: 1972-03-01
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Granted: 1973-09-18
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Expires: 1992-03-01
Abstract
Abstract A dynamo electric machine comprises a stator, a rotor, a pair of slip rings mounted on the shaft of the rotor, and a pair of brushes. The brushes are mounted in a housing which is bolted to a printed circuit board surrounding the rotor shaft by bolts passing through bosses in the housing. Torsion springs are mounted on the bosses and urge the brushes against the slip rings. The bolts are electrically connected to appropriate parts of the printed circuit board and leads extend from the brushes to the bolts so that the brushes are electrically connected to the printed circuit by way of the bolts.
Inventors
- 👤 H Cotton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:44
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/141
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A dynamo electric machiNe having rotary contact elements and a wiring arrangement supported on an insulating base, to which wiring arrangement a plurality of parts of the machine circuit are connected, includes a brush assembly comprising a housing, a plurality of bosses provided on said housing, a plurality of brushes slidable in the housing, a spring mounted on each boss, said springs urging said brushes into engagement with said contact elements, and a fixing means extending between said housing and said insulating base and through each boss to secure the housing to the base, each said fixing means also providing an electrical connection between an associated brush and a part of said wiring arrangement.
Claim 2
Dependent Claim
114 words
A dynamo electric machiNe having rotary contact elements and a wiring arrangement supported on an insulating base, to which wiring arrangement a plurality of parts of the machine circuit are connected, includes a brush assembly comprising a housing, a plurality of bosses provided on said housing, a plurality of brushes slidable in the housing, a spring mounted on each boss, said springs urging said brushes into engagement with said contact elements, and a fixing means extending between said housing and said insulating base and through each boss to secure the housing to the base, each said fixing means also providing an electrical connection between an associated brush and a part of said wiring arrangement.
Claim 3
Dependent Claim
59 words
A dynamo electric machine as claimed in claim 1, wherein the housing includes a cylindrical portion mounted eccentrically with respect to a rotor shaft of the machine and a rectangular portion extending from an end wall of the cylindrical portion, said rectangular portion slidably receiving on e of the brushes and passing through an aperture in the insulating base.
Claim 4
Dependent Claim
43 words
A dynamo electric machine as claimed in claim 1, wherein a flanged channel member forming part of the housing slidably receives on of the brushes and is secured relative to the insulating base and the remainder of the housing by the fixing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |