Patent US6721462B2 successfully refreshed from Google Patents.
US3708718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switching device
Assignee: Siemens AG
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Filing: 1970-10-13
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Granted: 1973-01-02
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Expires: 1990-10-13
Abstract
Abstract An electronic switch is connected in series circuit arrangement with a capacitor. The series circuit arrangement is connected in parallel with a vacuum switch. A control circuit coupled between the vacuum switch and the electronic switch controls the electronic switch in conductive condition in a manner whereby the electronic switch is switched to its conductive condition immediately after the contacts of the vacuum switch are opened thereby providing a current path from the capacitor to the vacuum switch via the electronic switch.
Inventors
- 👤 M Hoffmann
- 👤 K Fork
- 👤 P Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:12
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/02; H01H33/59
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
An electrical switching device, comprising a vacuum switch having contacts; an electronic switch connected in series circuit arrangement with a capacitor, said series circuit arrangement being connected in parallel with the vacuum switch; control means coupled between the vacuum switch and the electronic switch vor controlling said electronic switch in conductive condition in a manner whereby said electronic switch is switched to its conductive condition after the contacts of said vacuum switch are opened thereby providing a current path from said capacitor to said vacuum switch via said electronic switch as a result of which the arc is quenched in the vacuum switch; a non-linear resistor connected in parallel with the series circuit arrangement, said non-linear resistor being apportioned so that it takes over the load current after the contacts of the vacuum switch are opened; and an inductor connected to the vacuum switch for limiting the slope of the current.
Claim 2
Dependent Claim
151 words
An electrical switching device, comprising a vacuum switch having contacts; an electronic switch connected in series circuit arrangement with a capacitor, said series circuit arrangement being connected in parallel with the vacuum switch; control means coupled between the vacuum switch and the electronic switch vor controlling said electronic switch in conductive condition in a manner whereby said electronic switch is switched to its conductive condition after the contacts of said vacuum switch are opened thereby providing a current path from said capacitor to said vacuum switch via said electronic switch as a result of which the arc is quenched in the vacuum switch; a non-linear resistor connected in parallel with the series circuit arrangement, said non-linear resistor being apportioned so that it takes over the load current after the contacts of the vacuum switch are opened; and an inductor connected to the vacuum switch for limiting the slope of the current.
Claim 3
Dependent Claim
62 words
An electrical switching device as claimed in claim 1, wherein the electronic switch comprises a controlled rectifier having a control electrode and the control means comprises electronic delay means for adjusting the time for the interruption of the arc and electrically conductive means connecting the contacts of the vacuum switch to the control electrode of the controlled rectifier via said delay means.
Claim 4
Dependent Claim
43 words
An electrical switching device as claimed in claim 1, further comprising an auxiliary switch interposed between the vacuum switch and said series circuit arrangement and said non-linear resistor for selectively disconnecting said series circuit arrangement and said non-linear resistor from said vacuum switch.
Claim 5
Dependent Claim
20 words
An electrical switching device as claimed in claim 1, wherein the inductor is connected in series with the vacuum switch.
Claim 6
Dependent Claim
29 words
An electrical switching device as claimed in claim 1, wherein the electronic switch comprises a controlled rectifier and further comprising a rectifier connected in antiparallel with said controlled rectifier.
Claim 7
Dependent Claim
151 words
An electrical switching device, comprising a vacuum switch having contacts; an electronic switch connected in series circuit arrangement with a capacitor, said series circuit arrangement being connected in parallel with the vacuum switch; control means couplEd between the vacuum switch and the electronic switch for controlling said electronic switch in conductive condition in a manner whereby said electronic switch is switched to its conductive condition after the contacts of said vacuum switch are opened thereby providing a current path from said capacitor to said vacuum switch via said electronic switch as a result of which the arc is quenched in the vacuum switch; a surge diverter connected in parallel with the series circuit arrangement, said surge diverter being apportioned so that it takes over the load current after the contacts of the vacuum switch are opened; and an inductor connected to the vacuum switch for limiting the slope of the current.
Claim 8
Dependent Claim
151 words
An electrical switching device, comprising a vacuum switch having contacts; an electronic switch connected in series circuit arrangement with a capacitor, said series circuit arrangement being connected in parallel with the vacuum switch; control means couplEd between the vacuum switch and the electronic switch for controlling said electronic switch in conductive condition in a manner whereby said electronic switch is switched to its conductive condition after the contacts of said vacuum switch are opened thereby providing a current path from said capacitor to said vacuum switch via said electronic switch as a result of which the arc is quenched in the vacuum switch; a surge diverter connected in parallel with the series circuit arrangement, said surge diverter being apportioned so that it takes over the load current after the contacts of the vacuum switch are opened; and an inductor connected to the vacuum switch for limiting the slope of the current.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |