US4680665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge arrester
Assignee: Vertiv Energy Systems Inc
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Filing: 1985-12-03
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Granted: 1987-07-14
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Expires: 2005-12-03
Abstract
Abstract A gas discharge arrester in which annular bands are attached to the inside surface of the arrester. The spacing between the bands is equal to or somewhat greater than the width of the interelectrode gap. Each band is in contact with its associated electrode. The bands function to minimize the effect that placing the arrester in a metallic cup has on the symmetry of the electric field in the arrester, and, at the same time, act to lower the impulse breakdown of the arrester.
Inventors
- 👤 John S. Bonnesen
- 👤 Timothy J. Sporer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:51
CPC Classifications
H; H01; H01T; H01T4/00; H01T1/00; H01T1/20; H01T4/10; H01T4/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 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, the improvement comprising: two axially spaced annular conductor bands attached to the inner surface of said body, said bands covering the inner circumference of said body, one of said bands being in electrical contact with one of said electrodes and the other of said bands being in electrical contact with the other of said electrodes.
Claim 2
Dependent Claim
91 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, the improvement comprising: two axially spaced annular conductor bands attached to the inner surface of said body, said bands covering the inner circumference of said body, one of said bands being in electrical contact with one of said electrodes and the other of said bands being in electrical contact with the other of said electrodes.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein the spacing between said bands is substantially aligned with said gap.
Claim 4
Dependent Claim
120 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, the improvement comprising: two axially spaced annular conductor bands attached to the inner surface of said body, said bands being of a predetermined type of conductive material, said bands covering the inner circumference of said body, one of said bands being in electrical contact with one of said electrodes and the other of said bands being in electrical contact with the other of said electrodes, said conductor bands being the only conductive material of said predetermined type on said inner surface of said body.
Claim 5
Dependent Claim
120 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, the improvement comprising: two axially spaced annular conductor bands attached to the inner surface of said body, said bands being of a predetermined type of conductive material, said bands covering the inner circumference of said body, one of said bands being in electrical contact with one of said electrodes and the other of said bands being in electrical contact with the other of said electrodes, said conductor bands being the only conductive material of said predetermined type on said inner surface of said body.
Claim 6
Dependent Claim
17 words
The device of claim 3 wherein the spacing between said bands is substantially aligned with said gap.
References Cited (Backward Citations)
US3588576A
Cited
US3989985A
Cited
US3979646A
Cited
US4287548A
Cited
US4241374A
Cited
US4466043A
Cited
US4493006A
Cited
US4578733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |