Patent US4158872A successfully refreshed from Google Patents.
US4158872A
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US
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Surge diverter
Assignee: Rockwell Automation Switzerland GmbH
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Filing: 1977-11-23
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Granted: 1979-06-19
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Expires: 1997-11-23
Abstract
Abstract A surge diverter connected between a conductor and ground comprising several spark-quenching gaps, voltage-controlled shunting resistors connected in series with these gaps and voltage controlled control-resistors, each connected in parallel either to a gap alone or to a unit formed by a gap and a shunting resistor in series with the latter. The voltage-controlled control-resistors have current-voltage characteristics with substantially the same steepness, while the resistance value of these control-resistors at the rated voltage increases sequentially from the conductor to grand.
Inventors
- 👤 Viktor Stephanides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:10
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/16; H01T4/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
In a surge diverter connected between a conductor terminal and ground comprising several spark-quenching gaps voltage-controlled discharge resistors connected in series with said gaps and voltage-controlled control-resistors each of which is connected in parallel either with a spark-quenching gap or with the serial unit formed by a spark-quenching gap and a discharge resistor mounted in series, the improvement wherein the voltage-controlled control-resistors have current-voltage characteristics of substantially the same steepness, and resistance values at the rated voltage which are mutually different and increase sequentially from the conductor terminal to ground.
Claim 2
Dependent Claim
90 words
In a surge diverter connected between a conductor terminal and ground comprising several spark-quenching gaps voltage-controlled discharge resistors connected in series with said gaps and voltage-controlled control-resistors each of which is connected in parallel either with a spark-quenching gap or with the serial unit formed by a spark-quenching gap and a discharge resistor mounted in series, the improvement wherein the voltage-controlled control-resistors have current-voltage characteristics of substantially the same steepness, and resistance values at the rated voltage which are mutually different and increase sequentially from the conductor terminal to ground.
Claim 3
Dependent Claim
14 words
Surge diverter according to claim 1, comprising control-capacitors connected in parallel with the control-resistors.
Claim 4
Dependent Claim
15 words
Surge diverter according to claim 2, wherein said control capacitors all have the same capacity.
Claim 5
Dependent Claim
21 words
Surge diverter according to claim 2, wherein said control-capacitors have mutually different capacities, which decrease from the conductor terminal to ground.
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) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |