US3684995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical bushing assembly
Assignee: Westinghouse Electric Corp
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Filing: 1970-12-09
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Granted: 1972-08-15
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Expires: 1990-12-09
Abstract
Abstract An electrical bushing assembly including an insulating body member having an axial opening or bore, with a fuse assembly disposed therein. The fuse assembly consists of a fuse tube having an electrode at each end thereof, with a fuse link located within the fuse tube and having each of its ends attached to one of the electrodes. A semiconducting coating is disposed on the inside wall of the fuse tube and an insulating member is disposed around the fuse link and that portion of the lead wire within the fuse tube.
Inventors
- 👤 William E Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:38
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/042; H01B; H01B17/00; H01B17/005; H01F; H01F27/00; H01F27/02; H01F27/04; H01F27/40; H01F27/402; H01F27/404; H01H2085/0225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
200 words
In an electrical bushing assembly, an insulating body member having first and second ends, said insulating body member having a longitudinal opening therein which extends between said ends, terminal means mounted at the first end of said insulating body member, a fuse assembly comprising an insulated tubular member having a longitudinal opening therethrough and first and second ends, a semiconducting coating on the inside wall of said insulated tubular member, first and second electrodes mounted adjacent said first and second ends of said insulated tubular member, a fusible element extending through said longitudinal opening in said insulated tubular member and connected to said first and second electrodes adjacent the first and second ends of said insulated tubular member, a longitudinal insulating member disposed substantially coextensive with and tightly around said fusible element to reduce the air space around said fusible element and reduce the electrical gradient within the air gap between the fusible element and said semiconducting coating on the inside wall of said insulated tubular member, said insulated tubular member being positioned in said longitudinal opening in said insulating body member, and means connecting an electrode of said fuse assembly to said terminal means on said insulating body member.
Claim 2
Dependent Claim
200 words
In an electrical bushing assembly, an insulating body member having first and second ends, said insulating body member having a longitudinal opening therein which extends between said ends, terminal means mounted at the first end of said insulating body member, a fuse assembly comprising an insulated tubular member having a longitudinal opening therethrough and first and second ends, a semiconducting coating on the inside wall of said insulated tubular member, first and second electrodes mounted adjacent said first and second ends of said insulated tubular member, a fusible element extending through said longitudinal opening in said insulated tubular member and connected to said first and second electrodes adjacent the first and second ends of said insulated tubular member, a longitudinal insulating member disposed substantially coextensive with and tightly around said fusible element to reduce the air space around said fusible element and reduce the electrical gradient within the air gap between the fusible element and said semiconducting coating on the inside wall of said insulated tubular member, said insulated tubular member being positioned in said longitudinal opening in said insulating body member, and means connecting an electrode of said fuse assembly to said terminal means on said insulating body member.
Claim 3
Dependent Claim
39 words
The bushing assembly of claim 1 wherein the longitudinal insulating member disposed around the fusible element maintains at least a minimum spacing between said fusible element and the semiconducting coating on the inside wall of the insulated tubular member.
Claim 4
Dependent Claim
22 words
The bushing assembly of claim 1 wherein the longitudinal insulating member disposed around the fusible element is constructed of polyvinylchloride coated fiberglass.
Claim 5
Dependent Claim
127 words
A fuse assembly comprising a first insulating tubular member having first and second ends, said first tubular member having a central opening extending from said first end to said second end, a semiconducting coating on the wall of said central opening, a first electrode mounted adjacent said first end, a second electrode mounted adjacent said second end, a longitudinal fusible element inside said central opening in said insulating tubular member, means connecting the ends of said longitudinal fusible element to said first and second electrodes, and a second insulating means positioned between said fusible member and said tubular member, said second insulating means being disposed substantially cOextensive with and tightly around said fusible member, leaving an air space between said second insulating member and said semiconducting coating.
Claim 6
Dependent Claim
127 words
A fuse assembly comprising a first insulating tubular member having first and second ends, said first tubular member having a central opening extending from said first end to said second end, a semiconducting coating on the wall of said central opening, a first electrode mounted adjacent said first end, a second electrode mounted adjacent said second end, a longitudinal fusible element inside said central opening in said insulating tubular member, means connecting the ends of said longitudinal fusible element to said first and second electrodes, and a second insulating means positioned between said fusible member and said tubular member, said second insulating means being disposed substantially cOextensive with and tightly around said fusible member, leaving an air space between said second insulating member and said semiconducting coating.
Claim 7
Dependent Claim
13 words
The fuse assembly of claim 4 wherein said second insulating means comprises polyvinylchloride.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |