US4084208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-filled surge arrestors
Assignee: Bank of America Illinois
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Filing: 1975-03-28
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Granted: 1978-04-11
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Expires: 1995-03-28
Abstract
Abstract A surge arrestor is provided having two electrodes attached at opposite ends of an insulator tube. Portions of the respective electrodes extend toward each other to define a gap therebetween. At least one conductor is attached to the inner surface of the tube in the vicinity of the gap. The conductor is completely separated from the electrodes and covers a substantial portion of the inner surface of the tube.
Inventors
- 👤 A. Bazarian
- 👤 J. S. Bonnesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:32
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
192 words
In a surge arrestor having two electrodes separated from each other by, and secured within an insulator tube having a substantially cylindrical interior cavity, said tube and electrodes defining a closed interior space, said electrodes comprising rear portions secured to said tube, intermediate portions extending toward one another, each of said intermediate portions having a continuously tapered surface substantially in the form of the surface of a conical section, such that the distance between the wall of said cavity and said surface varies along the length of said intermediate portion, and front portions laterally spaced from said tube and spaced from one another to define a gap therebetween, and a gas filling the space between said elctrodes within said tube, the improvement comprising; at least one conductor attached to the inner surface of said tube, completely spaced from said electrodes, and having axial edges exposed to said interior space adjacent said electrodes but relatively remote from said gap, wherein said at least one conductor is comprised of two circumferentially spaced conductors with each extending from most of the length of said tube and around a portion of the circumference of said tube.
Claim 2
Dependent Claim
192 words
In a surge arrestor having two electrodes separated from each other by, and secured within an insulator tube having a substantially cylindrical interior cavity, said tube and electrodes defining a closed interior space, said electrodes comprising rear portions secured to said tube, intermediate portions extending toward one another, each of said intermediate portions having a continuously tapered surface substantially in the form of the surface of a conical section, such that the distance between the wall of said cavity and said surface varies along the length of said intermediate portion, and front portions laterally spaced from said tube and spaced from one another to define a gap therebetween, and a gas filling the space between said elctrodes within said tube, the improvement comprising; at least one conductor attached to the inner surface of said tube, completely spaced from said electrodes, and having axial edges exposed to said interior space adjacent said electrodes but relatively remote from said gap, wherein said at least one conductor is comprised of two circumferentially spaced conductors with each extending from most of the length of said tube and around a portion of the circumference of said tube.
Claim 3
Dependent Claim
21 words
The device of claim 1, wherein the conductors are substantially centered about said gap in the axial direction of said tube.
Claim 4
Dependent Claim
17 words
The device of claim 1, wherein the respective circumferential centers of said conductors are approximately 180° apart.
Claim 5
Dependent Claim
21 words
The device of claim 3, wherein the conductors are substantially centered about said gap in the axial direction of said tube.
Claim 6
Dependent Claim
131 words
In a surge arrestor having two electrodes separated from each other by, and secured to, an insulator tube, said tube and electrodes defining a closed interior space, said electrodes comprising rear portions secured to said tube, intermediate tapered portions extending toward one another, and front portions laterally spaced from said tube and spaced from one another to define a gap therebetween, and a gas filling the space between said electrodes within said tube, the improvement comprising: two axially spaced annular conductor bands attached to the inner surface of said tube, completely spaced from said electrodes, and having axial edges exposed to said interior surface adjacent said electrodes but relatively remote from said gap, said bands covering a portion of the inner circumference of said tube in the vicinity of said gap.
Claim 7
Dependent Claim
131 words
In a surge arrestor having two electrodes separated from each other by, and secured to, an insulator tube, said tube and electrodes defining a closed interior space, said electrodes comprising rear portions secured to said tube, intermediate tapered portions extending toward one another, and front portions laterally spaced from said tube and spaced from one another to define a gap therebetween, and a gas filling the space between said electrodes within said tube, the improvement comprising: two axially spaced annular conductor bands attached to the inner surface of said tube, completely spaced from said electrodes, and having axial edges exposed to said interior surface adjacent said electrodes but relatively remote from said gap, said bands covering a portion of the inner circumference of said tube in the vicinity of said gap.
Claim 8
Dependent Claim
17 words
The device of claim 5, wherein the spacing between said bands is substantially aligned with said gap.
Claim 9
Dependent Claim
16 words
The device of claim 5, wherein said bands are, respectively, substantially equidistantly spaced from said gap.
Claim 10
Dependent Claim
25 words
The device of claim 7, wherein the separations at both ends of the tube between the respective bands and their adjacent electrodes are substantially equal.
Claim 11
Dependent Claim
11 words
The device of claim 5, wherein said bands are substantially identical.
Claim 12
Dependent Claim
16 words
The device of claim 9, wherein said bands are, respectively, substantially equidistantly spaced from said gap.
Claim 13
Dependent Claim
25 words
The device of claim 5, wherein the separations at both ends of the tube between the respective bands and their adjacent electrodes are substantially equal.
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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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |