US5396212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer winding
Assignee: Cooper Industries LLC
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Filing: 1992-04-27
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Granted: 1995-03-07
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Expires: 2012-04-27
Abstract
Abstract A transformer conductor is shaped so as to compensate for the deformation that occurs when the conductor is bent through a small radius of curvature. The shape in cross-section of the conductor may take the form of a chamfered rectangle.
Inventors
- 👤 Augusto D. Hernandez
- 👤 Gary D. King
- 👤 Craig J. De Rouen
- 👤 Kenneth R. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2823
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A method of compactly winding conductor about a core having a rectangular cross-section, comprising the steps of: providing a conductor with a cross-sectional shape having an first, rectangular portion and a second, trapezoidal portion contiguous with the first rectangular portion and being oriented so as to lie nearer the core than the first, rectangular portion; and bending the conductor about the right-angle edges of the core so that as the conductor is wound about the core, the trapezoidal portion of the conductor nearer the core expands laterally outwardly and the rectangular portion of the cross section of the conductor laterally contracts in the region of the core edges.
Claim 2
Independent Claim
108 words
A method of compactly winding conductor about a core having a rectangular cross-section, comprising the steps of: providing a conductor with a cross-sectional shape having an first, rectangular portion and a second, trapezoidal portion contiguous with the first rectangular portion and being oriented so as to lie nearer the core than the first, rectangular portion; and bending the conductor about the right-angle edges of the core so that as the conductor is wound about the core, the trapezoidal portion of the conductor nearer the core expands laterally outwardly and the rectangular portion of the cross section of the conductor laterally contracts in the region of the core edges.
Claim 3
Dependent Claim
15 words
The method of claim 1, wherein the conductor is shaped by extrusion through a die.
Claim 4
Dependent Claim
15 words
The method of claim 1, wherein the conductor is is formed through a rolling process.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein the conductor is made of aluminum.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein the conductor is made of copper.
Claim 7
Dependent Claim
63 words
A winding, comprising: a generally rectangular core having four longitudinally extending edges; and a length of conductor, said conductor being wound about the core and having a compound cross-sectional shape in the portion of the winding that is between the edges of the core having a first, generally rectangular portion away from the core and a second, trapezoidally-shaped portion closer to the core.
Claim 8
Dependent Claim
63 words
A winding, comprising: a generally rectangular core having four longitudinally extending edges; and a length of conductor, said conductor being wound about the core and having a compound cross-sectional shape in the portion of the winding that is between the edges of the core having a first, generally rectangular portion away from the core and a second, trapezoidally-shaped portion closer to the core.
Claim 9
Dependent Claim
12 words
The winding of claim 6, wherein the conductor is made of aluminum.
Claim 10
Dependent Claim
12 words
The winding of claim 6, wherein the conductor is made of copper.
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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) | 1998-03-06 | 1998-09-05 | 1999-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-06 | 2002-09-05 | 2003-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-06 | 2006-09-05 | 2007-03-07 | $7700.00 | Window Closed / Lapsed |