Patent US3469398A successfully refreshed from Google Patents.
Patent US3928832A successfully refreshed from Google Patents.
US3928832A
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US
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Transformer winding with helically wound layers of a tape-like conductor
Assignee: ABB Norden Holding AB
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Filing: 1974-09-30
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Granted: 1975-12-23
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Expires: 1994-09-30
Abstract
Abstract A transformer winding is formed of a tape-like conductor running helically in a plurality of layers in which the tape advances successively from one end of the layer to the other in overlapping relationship with the overlap increasing from layer to layer so that the length of the layers becomes progressively shorter towards the outside. Insulation between the successive helical coils is wound on at the same time that the layers are formed.
Inventors
- 👤 Svante Forsberg
- 👤 Stig Larbo
- 👤 Bjorn Stephensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/083; H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/323
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
A transformer winding comprising a tape-like conductor wound in a succession of over-lapping helical turns forming a plurality of layers with turn insulation between the turns and layer insulation between the layers, the overlap in successive layers increasing outwardly and the axial length of the layers decreases progressively.
Claim 2
Dependent Claim
48 words
A transformer winding comprising a tape-like conductor wound in a succession of over-lapping helical turns forming a plurality of layers with turn insulation between the turns and layer insulation between the layers, the overlap in successive layers increasing outwardly and the axial length of the layers decreases progressively.
Claim 3
Dependent Claim
62 words
In a winding as claimed in claim 1, the combination of open turns of metal tape enclosed in the layer insulation between the outer end portions of successive layers of the conductor, and edge screens of tape-like conductor material at the transition between successive layers, the radial distance between said turns and between a screen and an adjacent turn being substantially constant.
References Cited (Backward Citations)
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US1932640A
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US2328443A
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |