Patent US4172270A successfully refreshed from Google Patents.
US4172270A
Expired / Lapsed
US
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Compressed gas filled circuit breaker
Assignee: Fuji Electric Co Ltd
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Filing: 1977-06-21
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Granted: 1979-10-23
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Expires: 1997-06-21
Abstract
Abstract An electrical circuit breaker comprising a pair of switches 40 connected in series in a power line L, a pair of drive coils 42 disposed adajcent the switches for electromagnetically repelling them when energized, and a remotely positioned transformer 44, 46 for energizing the coils, all disposed within grounded main and auxilliary tanks 38, 48 filled with a compressed, arc-suppressing gas. The primary winding of the transformer is energized by a storage capacitor 52 discharging through a spark gap 50 arced by a synchronous detector 62 and a pulse converter 58 in response to a line overage sensed by a coil 64 or an external control signal, and these latter components are disposed outside of the high voltage tanks.
Inventors
- 👤 Nobuaki Kiyokuni
- 👤 Tadashi Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:52
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/021; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
In an electrical circuit breaker including grounded tank means filled with an arc-suppressant, at least one gerrous switch disposed in the tank means and connected in series in a power line passing through the tank means, at least one drive coil disposed in the tank means adjacent the switch for electromagnetically opening said switch when energized, a transformer disposed in the tank means and including a primary winding and a secondary winding connected in series with the drive coil, and a storage capacitor and a charging and discharge control circuit therefore disposed outside the tank means, the capacitor being connected in series with the transformer primary winding, the improvements characterized by: (a) the grounded tank means comprising a main tank and an auxilliary tank, (b) the switch, power line, and drive coil being disposed in the main tank, and (c) the transformer being disposed in the auxilliary tank remote from the power line.
Claim 2
Dependent Claim
153 words
In an electrical circuit breaker including grounded tank means filled with an arc-suppressant, at least one gerrous switch disposed in the tank means and connected in series in a power line passing through the tank means, at least one drive coil disposed in the tank means adjacent the switch for electromagnetically opening said switch when energized, a transformer disposed in the tank means and including a primary winding and a secondary winding connected in series with the drive coil, and a storage capacitor and a charging and discharge control circuit therefore disposed outside the tank means, the capacitor being connected in series with the transformer primary winding, the improvements characterized by: (a) the grounded tank means comprising a main tank and an auxilliary tank, (b) the switch, power line, and drive coil being disposed in the main tank, and (c) the transformer being disposed in the auxilliary tank remote from the power line.
Claim 3
Dependent Claim
19 words
A circuit breaker as defined in claim 1, wherein the main tank is integrally formed with the auxilliary tank.
Claim 4
Dependent Claim
18 words
A circuit breaker as defined in claim 1, wherein the main tank is independent of the auxilliary tank.
Claim 5
Dependent Claim
20 words
A circuit breaker as defined in claim 1, wherein the transformer primary and secondary windings are cylindrical and concentrically arranged.
Claim 6
Dependent Claim
23 words
A circuit breaker as defined in claim 1, wherein the transformer primary and secondary windings are co-axially arranged and have substantially identical diameters.
Claim 7
Dependent Claim
23 words
A circuit breaker as defined in claim 3, wherein the arc-suppressant in the main tank is different from that in the auxilliary tank.
Claim 8
Dependent Claim
15 words
A circuit breaker as defined in claim 1, wherein the transformer has an air core.
Claim 9
Dependent Claim
15 words
A circuit breaker as defined in claim 1, wherein the transformer has an iron core.
Claim 10
Dependent Claim
20 words
A circuit breaker as defined in claim 3, wherein the main and auxilliary tanks are separated by a partition plate.
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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |