Patent US4496933A successfully refreshed from Google Patents.
US4496933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled resistor pack for brush with individually insulated strands
Assignee: Westinghouse Electric Corp
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Filing: 1984-02-27
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Granted: 1985-01-29
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Expires: 2004-02-27
Abstract
Abstract A cooled resistor pack for a dynamoelectric machine wherein cooling water is passed through ducts in a conductive block and plurality of connectors are mechanically attached to the conductive block but electrically insulated therefrom and nichrome wires of varying length and varying in number electrically join the connectors to the conductive block and individually insulated brush segments, which have individual strands and the brush segments are connected to separate connectors in such a manner that the resistance between the brush segments and the block decreases from the trailing end segments to the leading end segments of the brush.
Inventors
- 👤 Donald G. Martin
- 👤 Donald M. York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:33
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/18; H01R39/24; H01C; H01C1/00; H01C1/08; H01C1/082
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
The combination of a cooled resistor pack and brushes having a plurality of multi-strand segments insulated from each other, said combination comprising: a conductive block having ducts cooperatively associated therewith to remove heat therefrom; a plurality of connectors mechanically fastened to said block and electrically insulated therefrom; wires having high resistivity electrically connecting said conductors to said block; and a highly conductive lead electrically connecting each of the brush segments to a separate connector.
Claim 2
Dependent Claim
74 words
The combination of a cooled resistor pack and brushes having a plurality of multi-strand segments insulated from each other, said combination comprising: a conductive block having ducts cooperatively associated therewith to remove heat therefrom; a plurality of connectors mechanically fastened to said block and electrically insulated therefrom; wires having high resistivity electrically connecting said conductors to said block; and a highly conductive lead electrically connecting each of the brush segments to a separate connector.
Claim 3
Dependent Claim
18 words
The combination as set forth in claim 1, wherein the highly conductive leads are generally the same length.
Claim 4
Dependent Claim
14 words
The combination as set forth in claim 1, wherein the connectors vary in length.
Claim 5
Dependent Claim
23 words
The combination as set forth in claim 1, wherein the number of highly resistive wires electrically connecting the connectors and the block varies.
Claim 6
Dependent Claim
24 words
The combination as set forth in claim 3, wherein the length of the highly resistive wires electrically connecting the block connectors varies in length.
Claim 7
Dependent Claim
23 words
The combination as set forth in claim 5, wherein the distance from one end of each connector to the block is generally constant.
Claim 8
Dependent Claim
48 words
The combination as set forth in claim 6, wherein the resistance of the highly resistive wires electrically connected to the leading segment of the brush is substantially less than the resistance of the highly conductive resistive wires electrically connecting the trailing segment of the brush to the block.
Claim 9
Dependent Claim
23 words
The combination as set forth in claim 5, wherein the number of highly resistive wires electrically connecting the conductors and the block varies.
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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |