US3634800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer strip winding
Assignee: Cooper Industries LLC
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Filing: 1971-01-07
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Granted: 1972-01-11
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Expires: 1991-01-07
Abstract
Abstract A transformer winding comprising a strip or foil conductor having two longitudinal fold portions which are folded against the length of the strip. The fold portions have opposed, spaced apart, facing edges which define a space between the edges. The conductor is insulated by an insulative strip which is also folded and has edges overlapped within the space defined by the opposed edges of the strip conductor.
Inventors
- 👤 John L Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:21
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/323; H01F5/00; H01F27/327; H01F2027/328
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
In a transformer including a winding having a conductor comprising: an electrically conductive strip having a length including outwardly facing longitudinal edges and two folded portions pOsitioned parallel with said length, said folded portions each having a fold bend positioned at a different one of said outwardly facing edges and having opposed spaced apart facing edges defining a space therebetween; and an electrically insulative strip having a length positioned against the length of the conductive strip and two folded portions positioned against the folded portions of the conductive strip, said insulative strip folded portions having edges overlapped in the space between said facing edges of the conductive strip.
Claim 2
Dependent Claim
108 words
In a transformer including a winding having a conductor comprising: an electrically conductive strip having a length including outwardly facing longitudinal edges and two folded portions pOsitioned parallel with said length, said folded portions each having a fold bend positioned at a different one of said outwardly facing edges and having opposed spaced apart facing edges defining a space therebetween; and an electrically insulative strip having a length positioned against the length of the conductive strip and two folded portions positioned against the folded portions of the conductive strip, said insulative strip folded portions having edges overlapped in the space between said facing edges of the conductive strip.
Claim 3
Dependent Claim
18 words
The combination according to claim 1 wherein said conductive strip and insulative strip are laminated to each other.
Claim 4
Dependent Claim
18 words
The combination according to claim 1 wherein one of said overlapped edges is entirely positioned in said space.
Claim 5
Dependent Claim
36 words
The combination according to claim 3 wherein the conductive strip and insulative strip each have a thickness and the thickness of the conductive strip is at least as large as the thickness of the insulative strip.
Claim 6
Dependent Claim
20 words
The combination according to claim 3 wherein the balance of the insulative strip folded portions are in the same plane.
Claim 7
Dependent Claim
19 words
The combination according to claim 3 wherein the conductive strip folded portions engage the length of the conductive strip.
Claim 8
Dependent Claim
39 words
The combination according to claim 3 wherein: said transformer includes a core and a low-voltage winding around and adjacent the core; and said conductor is spirally wound around the outside of the low-voltage winding and has a toroidal shape.
Claim 9
Dependent Claim
68 words
A transformer winding having a conductor comprising: a rectangular strip of conductive material having a wide surface, a length and a groove parallel to said length in the surface; and a rectangular tube of insulative material positioned around and in engagement with the rectangular strip, said tube having a longitudinal seam comprising two overlapped edges of the insulation material, one of said edges being positioned in said groove.
Claim 10
Dependent Claim
68 words
A transformer winding having a conductor comprising: a rectangular strip of conductive material having a wide surface, a length and a groove parallel to said length in the surface; and a rectangular tube of insulative material positioned around and in engagement with the rectangular strip, said tube having a longitudinal seam comprising two overlapped edges of the insulation material, one of said edges being positioned in said groove.
Claim 11
Dependent Claim
28 words
The combination according to claim 8 wherein the other of said overlapped edges engages a portion of the edge in said groove and terminates along said engaged portion.
Claim 12
Dependent Claim
16 words
The combination according to claim 8 wherein said rectangular tube is adhered to said rectangular strip.
Claim 13
Independent Claim
187 words
The method of forming an insulated strip conductor for a transformer from an electrically conductive strip having a predetermined width and an electrically insulative strip having a greater width comprising the steps of: positioning the conductive strip against the insulative strip with the longitudinal edges of the conductive strip spaced from and parallel to the longitudinal edges of the insulative strip; folding two portions of the conductive strip in the same direction against itself along two lines parallel to the longitudinal edges of the conductive strip and spaced apart a distance greater than one-half of the total strip width, whereby a space is defined between facing edges of the fold portions; folding one portion of the insulative strip substantially along one of said two lines against a fold portion of the conductive strip and positioning an edge of said one portion in said defined space; and folding another portion of the insulative strip substantially along the other of said two lines against the other fold portion of the conductive strip and positioning the edge of said other fold portion against the edge of said one fold portion.
Claim 14
Independent Claim
187 words
The method of forming an insulated strip conductor for a transformer from an electrically conductive strip having a predetermined width and an electrically insulative strip having a greater width comprising the steps of: positioning the conductive strip against the insulative strip with the longitudinal edges of the conductive strip spaced from and parallel to the longitudinal edges of the insulative strip; folding two portions of the conductive strip in the same direction against itself along two lines parallel to the longitudinal edges of the conductive strip and spaced apart a distance greater than one-half of the total strip width, whereby a space is defined between facing edges of the fold portions; folding one portion of the insulative strip substantially along one of said two lines against a fold portion of the conductive strip and positioning an edge of said one portion in said defined space; and folding another portion of the insulative strip substantially along the other of said two lines against the other fold portion of the conductive strip and positioning the edge of said other fold portion against the edge of said one fold portion.
Claim 15
Dependent Claim
18 words
The method according to claim 11 further comprising the step of adhering the conductive and insulative strips together.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |