US4338487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser bushing
Assignee: NGK Insulators Ltd
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Filing: 1981-02-19
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Granted: 1982-07-06
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Expires: 2001-02-19
Abstract
Abstract A condenser bushing comprising a condenser core formed by winding around a center electrode an insulating paper, an electrically conductive or semi-conductive linear electrode arranged at at least one of the side edge portions of the insulating paper, and a plurality of intermediate electrodes having end portions making contact with the linear electrodes and extending in a widthwise direction of the insulating paper, the intermediate electrodes being inserted between the insulating layers and being spaced apart from each other by a given distance.
Inventors
- 👤 Junichi Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:14
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A condenser bushing comprising an insulating paper wound around a center electrode and forming insulating layers of a condenser core, said insulating paper being provided at at least one of its side edge portions extending in a lengthwise direction thereof with an electrically conductive or semi-conductive linear electrode and being provided with a plurality of intermediate electrodes having end portions making contact with said linear electrode and extending in a widthwise direction of said insulating paper, said intermediate electrodes being inserted between said insulating layers and being spaced apart from each other by a given distance.
Claim 2
Dependent Claim
96 words
A condenser bushing comprising an insulating paper wound around a center electrode and forming insulating layers of a condenser core, said insulating paper being provided at at least one of its side edge portions extending in a lengthwise direction thereof with an electrically conductive or semi-conductive linear electrode and being provided with a plurality of intermediate electrodes having end portions making contact with said linear electrode and extending in a widthwise direction of said insulating paper, said intermediate electrodes being inserted between said insulating layers and being spaced apart from each other by a given distance.
Claim 3
Dependent Claim
40 words
The condenser bushing according to claim 1, wherein said linear electrode is composed of a tape-shaped insulating paper including linear semi-conductor electrodes printed beforehand thereon and arranged at both side edges of said insulating paper wound around said center electrode.
Claim 4
Dependent Claim
27 words
The condenser bushing according to claim 1, wherein said linear electrode is composed of linear semi-conductor electrodes directly printed on both side edges of said insulating paper.
Claim 5
Dependent Claim
36 words
The condenser bushing according to claim 1, wherein said intermediate electrodes are spaced apart from each other by a distance corresponding to a thickness of 5 mm, 10 mm, . . . of the insulating layers.
References Cited (Backward Citations)
FR742448A
Cited
US1585124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |