Patent US3818165A successfully refreshed from Google Patents.
US3818165A
Expired / Lapsed
US
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Electric circuit interrupter
Assignee: General Electric Co
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Filing: 1973-04-26
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Granted: 1974-06-18
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Expires: 1993-04-26
Abstract
Abstract Discloses a circuit interrupter in which an arc is established during circuit interruption. Along the path of the arc, there is provided arc-extinguishing structure from which arc-extinguishing gas is evolved by the heat of the arc. The arc-extinguishing structure is of a material comprising tungsten trioxide, and the evolved gas comprises vapors of tungsten trioxide.
Inventors
- 👤 P Zavitsanos
- 👤 J Wittle
- 👤 J Zlupko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:48
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/76
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
35 words
The circuit interrupter of claim 1 in which said arc-extinguishing structure comprises tubular structure having a bore in which said arc is located during interruption, said bore being lined with a material comprising tungsten trioxide.
Claim 2
Dependent Claim
32 words
A circuit interrupter as defined in claim 1 in which said circuit interrupter is an arc chute comprising arc-extinguishing structure against which said arc is adapted to move and evolve tungsten trioxide.
Claim 3
Dependent Claim
42 words
A circuit interrupter as defined in claim 1 comprising transverse plates against which the arc is adapted to move during interruption, said plates having a covering thereon of a material comprising tungsten trioxide from which tungsten trioxide vapors are evolved during interruption.
Claim 4
Dependent Claim
43 words
The circuit interrupter of claim 1 in which said pair of electrodes are separable electrodes between which said arc is established upon separation of said electrodes and said arc is adapted to move against said arc-extinguishing structure and evolve tungsten trioxide vapors therefrom.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |