US3911385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outdoor current limiting fuse
Assignee: Westinghouse Electric Corp
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Filing: 1974-05-07
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Granted: 1975-10-07
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Expires: 1994-05-07
Abstract
Abstract An outdoor current limiting fuse structure is characterized by a generally tubular, electrically insulating casing having terminal means disposed at opposite ends thereof, one or more fusible elements connected between the terminal means and disposed within the casing and an epoxy resin on the exterior surface of the casing.
Inventors
- 👤 Donald D Blewitt
- 👤 Frank L Cameron
- 👤 Charles H Vondracek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:02
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/165
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A FUSE STRUCTURE COMPRISING A GENERALLY TUBULAR, ELECTRICALLY INSULATING CASING, TERMINAL MEANS DISPOSED ADJACENT TO EACH OF THE OPPOSITE ENDS OF SAID CASING, A FUSIBLE ELEMENT DISPOSED WITHIN THE CASING AND CONNECTED BETWEEN SAID TERMINAL MEANS, A COATING OF AN CYCLOALIPHATIC EPOXY RESIN ON THE EXTERIOR SURFACE OF THE CASING AND HAVING A THICKNESS OF FROM ABOUT 3 TO 20 MILS, AND THE COATING COMPRISING A POLYAZELAIC POLYANHYDRIDE HAVING AN APPROXIMATE MOLECULAR WEIGHT OF 2100-2500 AND HEXA-HYDROPTHOLIC ANHYDRIDE WHICH IS COMBINATION IS CONTAINED IN THE COATING AT A RATION OF 30-115 PARTS BY WEIGHT PER 100 PARTS OF RESIN, A FILLER SELECTED FROM A GROUP CONSISTING OF ALUMINUM TRIHYDRATE AND MAGNESITE, AND A THIXOTROPING AGENT.
Claim 2
Dependent Claim
115 words
A FUSE STRUCTURE COMPRISING A GENERALLY TUBULAR, ELECTRICALLY INSULATING CASING, TERMINAL MEANS DISPOSED ADJACENT TO EACH OF THE OPPOSITE ENDS OF SAID CASING, A FUSIBLE ELEMENT DISPOSED WITHIN THE CASING AND CONNECTED BETWEEN SAID TERMINAL MEANS, A COATING OF AN CYCLOALIPHATIC EPOXY RESIN ON THE EXTERIOR SURFACE OF THE CASING AND HAVING A THICKNESS OF FROM ABOUT 3 TO 20 MILS, AND THE COATING COMPRISING A POLYAZELAIC POLYANHYDRIDE HAVING AN APPROXIMATE MOLECULAR WEIGHT OF 2100-2500 AND HEXA-HYDROPTHOLIC ANHYDRIDE WHICH IS COMBINATION IS CONTAINED IN THE COATING AT A RATION OF 30-115 PARTS BY WEIGHT PER 100 PARTS OF RESIN, A FILLER SELECTED FROM A GROUP CONSISTING OF ALUMINUM TRIHYDRATE AND MAGNESITE, AND A THIXOTROPING AGENT.
Claim 3
Dependent Claim
17 words
The fuse structure of claim 1 in which the casing comprises a glass fiber-reinforced melamine resinous material.
Claim 4
Dependent Claim
40 words
The fuse structure of claim 1 in which the terminal means comprises a cup-shaped member fitting telescopically over each end of casing and forming an annular joint therewith, and a sealant in the joint and comprising a silicone rubber compound.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |