US3979646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge voltage arrester
Assignee: Siemens AG
•
Filing: 1974-10-09
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Granted: 1976-09-07
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Expires: 1994-10-09
Abstract
Abstract A surge voltage arrester having a gas-tight housing includes a pair of electrodes arranged at a distance opposite one another and with their active surfaces facing one another. The electrodes are inserted into respective ends of a tubular insulating body which carries at least one coating of electrically conductive material on the inner surface thereof extending over a portion of the tube length, the coating of electrically conductive material defines at least the envelope of a surface whose normal is approximately at right angles to the longitudinal axis of the surface voltage arrester. The coating of electrically conductive material may be punctiform circular, oval, triangular or polygonal. The coating may also be a semiconducting material, rather than a conductive material.
Inventors
- 👤 Gerhard Peche
- 👤 Gerhard Lange
- 👤 Dieter Grueneberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:14
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/20
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining a punctiform surface.
Claim 2
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining a punctiform surface.
Claim 3
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining a circular surface.
Claim 4
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining a circular surface.
Claim 5
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining an oval surface.
Claim 6
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining an oval surface.
Claim 7
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining a polygonal surface.
Claim 8
Dependent Claim
103 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode defining a polygonal surface.
Claim 9
Dependent Claim
18 words
The improved voltage arrester set forth in claim 4, wherein said ignition electrode defines a triangular polygonal surface.
Claim 10
Dependent Claim
17 words
The improved surge voltage arrester of claim 4, wherein said ignition electrode defines a rectangular polygonal surface.
Claim 11
Dependent Claim
123 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, the width of the ignition electrode in the region of the active surfaces of the discharge electrodes being approximately equal to the widths of the active surfaces.
Claim 12
Dependent Claim
123 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, the width of the ignition electrode in the region of the active surfaces of the discharge electrodes being approximately equal to the widths of the active surfaces.
Claim 13
Dependent Claim
111 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of the surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode comprising a mixture including a graphite suspension and a glass solder powder.
Claim 14
Dependent Claim
111 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of the surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode comprising a mixture including a graphite suspension and a glass solder powder.
Claim 15
Dependent Claim
17 words
The improved surge voltage arrester set forth in claim 8, wherein said mixture includes a radioactive dopant.
Claim 16
Dependent Claim
19 words
The improved surge voltage arrester set forth in claim 9, wherein said radioactive dopant comprises a radioactive promethium compound.
Claim 17
Dependent Claim
109 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode comprising a graphite lead, said graphite lead containing radioactive doping.
Claim 18
Dependent Claim
109 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: the ignition electrode is carried on the inner surface of the insulating body and defines at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester, said ignition electrode comprising a graphite lead, said graphite lead containing radioactive doping.
Claim 19
Dependent Claim
108 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: said tubular body consisting of glass, said tubular insulating body including a rough inner surface, and said ignition electrode carried on said rough inner surface and defining at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester.
Claim 20
Dependent Claim
108 words
In a surge voltage arrester of the type having a gas-tight housing wherein a pair of discharge electrodes are arranged with their active electrode surfaces facing each other and spaced apart in a tubular insulating body, and at least one ignition electrode is carried by the insulating body over a portion of the length thereof, the improvement wherein: said tubular body consisting of glass, said tubular insulating body including a rough inner surface, and said ignition electrode carried on said rough inner surface and defining at least the envelope of a surface which has a normal that is perpendicular to the longitudinal axis of the surge voltage arrester.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |