US4404488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush board assembly for dynamoelectric machine
Assignee: Singer Co
•
Filing: 1982-01-12
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Granted: 1983-09-13
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Expires: 2002-01-12
Abstract
Abstract A brush board assembly for a dynamoelectric machine is provided with flexible electrically conductive brush carrying flat springs which are pinned to a ring-like mounting board in a manner effective to electrically connect the spring to printed circuitry on the board.
Inventors
- 👤 John A. Herr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/39; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A brush board asssembly for a dynamoelectric machine comprising a non-conductive mounting board formed as a ring to extend around a commutator and including inwardly projecting portions, printed circuitry on the ring with portions extending onto the projecting portions of the ring where holes pass through the printed circuitry and ring, electrically conductive flat-type springs with slots through which said projecting portions of the ring and printed circuitry extend, electrically conductive pins in said holes and in tight engagement with the springs for securing the springs to the ring and electrically connecting said printed circuitry with the springs, and a commutator engageable brush affixed on each spring.
Claim 2
Dependent Claim
107 words
A brush board asssembly for a dynamoelectric machine comprising a non-conductive mounting board formed as a ring to extend around a commutator and including inwardly projecting portions, printed circuitry on the ring with portions extending onto the projecting portions of the ring where holes pass through the printed circuitry and ring, electrically conductive flat-type springs with slots through which said projecting portions of the ring and printed circuitry extend, electrically conductive pins in said holes and in tight engagement with the springs for securing the springs to the ring and electrically connecting said printed circuitry with the springs, and a commutator engageable brush affixed on each spring.
Claim 3
Dependent Claim
21 words
A brush board assembly as defined in claim 1, wherein the brushes are mounted in pierced cavities extending through the springs.
Claim 4
Dependent Claim
31 words
A brush board assembly as defined in claim 2, wherein the brushes are secured with an electrically conductive epoxy cement to jagged projections extending about the pierced cavities in the springs.
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |