Patent US3855563A successfully refreshed from Google Patents.
US3855563A
Expired / Lapsed
US
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Circuit interrupter
Assignee: Westinghouse Electric Corp
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Filing: 1973-11-21
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Granted: 1974-12-17
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Expires: 1993-11-21
Abstract
Abstract A high voltage circuit interrupter characterized by a tubular insulating casing and a tubular conducting casing which are telescopically combined and which contain separable conductors which are normally retained in closed circuit condition by fusible means. One end of the tubular insulating casing includes a ferrule for securing the fusible means in place and which ferrule is form-fitted in place. Likewise, the end of the tubular conducting casing remote from the tubular insulating casing includes an end cap to which the tubular conducting casing is form-fitted. The use of form-fitting for the several parts involved eliminates the need for additional fastening means.
Inventors
- 👤 F Cameron
- 👤 H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:03
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
A high voltage circuit interrupter comprising a tubular insulating casing, a body of arc-extinguishing material disposed inside of and spaced from the ends of the casing and having an opening extending axially therethrough, an elongated conducting member axially movable within the opening, terminal means at one end of the casing comprising a tubular conductor within the tubular insulating casing and in the spacing between the end of the body of arc-extinguishing material and said end of the casing, a ferrule on the exterior of the end portion of the casing, fusible means extending between the end of said member and the tubular conductor and comprising an end portion secured between the casing and the ferrule, the ferrule being form-fitted to the casing end portion for retaining the fusible means in place, a tubular conducting casing seated within the other end of the tubular insulating casing and extending outwardly therefrom, an annular conductor between the tubular conducting casing and the elongated conductor member, the tubular conducting member being form-fitted to the periphery of the annular conductor, and a helical spring between the elongated conductor member and the end of the tubular conducting member remote from the tubular insulating casing effective to move the elongated conducting member away from the fusible means upon fusion of the fusible means.
Claim 2
Dependent Claim
216 words
A high voltage circuit interrupter comprising a tubular insulating casing, a body of arc-extinguishing material disposed inside of and spaced from the ends of the casing and having an opening extending axially therethrough, an elongated conducting member axially movable within the opening, terminal means at one end of the casing comprising a tubular conductor within the tubular insulating casing and in the spacing between the end of the body of arc-extinguishing material and said end of the casing, a ferrule on the exterior of the end portion of the casing, fusible means extending between the end of said member and the tubular conductor and comprising an end portion secured between the casing and the ferrule, the ferrule being form-fitted to the casing end portion for retaining the fusible means in place, a tubular conducting casing seated within the other end of the tubular insulating casing and extending outwardly therefrom, an annular conductor between the tubular conducting casing and the elongated conductor member, the tubular conducting member being form-fitted to the periphery of the annular conductor, and a helical spring between the elongated conductor member and the end of the tubular conducting member remote from the tubular insulating casing effective to move the elongated conducting member away from the fusible means upon fusion of the fusible means.
Claim 3
Dependent Claim
43 words
The high voltage circuit interrupter of claim 1 in which a strain link is disposed between the elongated conducting member and the corresponding end of the tubular insulating casing, and the strain link having a higher coefficient of resistance than the fusible means.
Claim 4
Dependent Claim
32 words
The high voltage circuit interrupter of claim 1 in which the annular conductor comprises a peripheral groove, and the tubular conducting casing having an annular end flange form-fitted in the peripheral groove.
Claim 5
Dependent Claim
39 words
The high voltage circuit interrupter of claim 1 in which an end cap is disposed in the end of the tubular conducting casing remote from the tubular insulating casing, and the helical spring being attached to the end cap.
Claim 6
Dependent Claim
20 words
The high voltage circuit interrupter of claim 4 in which the tubular conducting casing is form-fitted to the end cap.
References Cited (Backward Citations)
US2386094A
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US2590524A
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US3401244A
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US3401246A
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US3401245A
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US3401243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |