Patent EP0089021A2 successfully refreshed from Google Patents.
US3858077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas tube transient voltage protector for telecommunication systems
Assignee: Bank of America Illinois
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Filing: 1973-11-20
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Granted: 1974-12-31
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Expires: 1993-11-20
Abstract
Abstract A transient voltage protector includes a hollow cylindrical housing having an open end and a closed end with a first insulating body mounted in the closed end thereof. An outer electrode in the shape of a hollow cylinder is mounted within the housing between the open end and the first insulating body. An inner electrode is mounted on and supported by the first insulating body, within the outer electrode and spaced therefrom. The inner electrode is provided with a recess on the surface opposite the surface mounted on the first insulating body. A second insulating body is adopted to engage the open end of the housing and is provided with a central bore therethrough. A connecting element is provided having an end portion and a body portion, the end portion being accessible from the exterior of the housing and the body portion extending through the bore in the second insulating body and into the recess in the inner electrode to further impart physical stability to the inner electrode as well as to provide an electrical connection thereto. The opposing surfaces of the inner and outer electrodes are coated with a substance comprising aluminum, magnesium and titanium hydride. The space between the electrodes is filled with a gas comprising hydrogen and argon, and preferably krypton as well. A thin layer of metal coating is situated on the surface of the first insulating body adjacent the inner electrode to enhance the electrical field at the junction between the insulating body and the inner electrode.
Inventors
- 👤 A Bazarian
- 👤 W Kineyko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:57
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/20; H02; H02H; H02H1/00; H02H1/04
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
141 words
A transient voltage protector comprising a hollow generally cylindrical housing having an open end and a closed end, a first insulating body mounted in said housing adjacent said closed end, an outer electrode in the shape of a hollow cylinder mounted in said housing between said open end and said first insulating body, an inner electrode mounted on said first insulating body within said outer electrode and spaced therefrom, a second insulating body adapted to engage said open end and having a bore therethrough and an electrical connecting element having an end portion and a body portion, said end portion being accessible to the exterior surface of said second insulating body and said body portion extending through said bore and engaging said inner electrode to impart physical stability to said inner electrode as well as to provide an electrical connection therewith.
Claim 2
Dependent Claim
141 words
A transient voltage protector comprising a hollow generally cylindrical housing having an open end and a closed end, a first insulating body mounted in said housing adjacent said closed end, an outer electrode in the shape of a hollow cylinder mounted in said housing between said open end and said first insulating body, an inner electrode mounted on said first insulating body within said outer electrode and spaced therefrom, a second insulating body adapted to engage said open end and having a bore therethrough and an electrical connecting element having an end portion and a body portion, said end portion being accessible to the exterior surface of said second insulating body and said body portion extending through said bore and engaging said inner electrode to impart physical stability to said inner electrode as well as to provide an electrical connection therewith.
Claim 3
Dependent Claim
42 words
The protector of claim 1 wherein said inner electrode has a recess therein on the surface opposite the surface mounted on said first insulating body, said body portion extending into said recess to provide engagement between said inner electrode and said element.
Claim 4
Dependent Claim
32 words
The protector of claim 1 wherein said first insulating body and said inner electrode have parts thereon adapted to interlock thereby providing engagement between said first insulating body and said inner electrode.
Claim 5
Dependent Claim
28 words
The protector of claim 1 wherein said outer electrode is provided with a protruding peripheral band to insure a tight fit between said outer electrode and said housing.
Claim 6
Dependent Claim
30 words
The protector of clAim 1 wherein the wall of the housing adjacent said closed end has a plurality of indentations therein adapted to frictionally clasp said first insulating member therebetween.
Claim 7
Dependent Claim
28 words
The protector of claim 1 wherein said substance comprises from 80 to 95 percent aluminum by weight and approximately equal parts by weight of magnesium and titanium hydride.
Claim 8
Dependent Claim
28 words
The protector of claim 1 wherein the opposing surfaces of said inner and outer electrodes are coated with a substance having a lower work function than said electrodes.
Claim 9
Dependent Claim
26 words
The protector of claim 1 further comprising a thin layer of metal coating situated on the surface of said first insulating body adjacent said inner electrode.
Claim 10
Dependent Claim
28 words
The protector of claim 8 wherein said metal coated insulator surface and an adjacent exposed surface of said inner electrode form about a 45* angle with each other.
Claim 11
Dependent Claim
20 words
The protector of claim 9 wherein the space between said electrodes is filled with a gas comprising hydrogen and argon.
Claim 12
Dependent Claim
20 words
The protector of claim 10 wherein said gas comprises 5 percent -30 percent hydrogen and 70 percent -95 percent argon.
Claim 13
Dependent Claim
16 words
The protector of claim 10 wherein said gas comprises 20 percent hydrogen and 80 percent argon.
Claim 14
Dependent Claim
13 words
The protector of claim 11 wherein said gas further comprises a radioactive substance.
Claim 15
Dependent Claim
21 words
The protector of claim 13 wherein said radioactive substance is present in quantities of approximately five millicurie per liter of gas.
Claim 16
Dependent Claim
11 words
The protector of claim 13 wherein said radioactive substance is krypton.
Claim 17
Dependent Claim
27 words
The protector of claim 15 wherein said housing has a first section and a second section, said first section having a smaller diameter than said second section.
Claim 18
Dependent Claim
30 words
The protector of claim 16 wherein said first and second sections are joined by an intermediary section forming a shoulder which prevents over-insertion of said outer electrode into said housing.
Claim 19
Dependent Claim
26 words
The protector of claim 1 wherein the opposing surfaces of said inner and outer electrodes are coated with a substance comprising aluminum, magnesium and titanium hydride.
Claim 20
Dependent Claim
26 words
The protector of claim 18 wherein said substance comprises aluminum 90.5 percent by weight, magnesium 4.75 percent by weight and titanium hydride 4.75 percent by weight.
Claim 21
Dependent Claim
26 words
The protector of claim 18 further comprising a thin layer of metal coating situated on the surface of said first insulating body adjacent said inner electrode.
Claim 22
Dependent Claim
20 words
The protector of claim 20 wherein said gas comprises 5 percent -30 percent hydrogen and 70 percent -95 percent argon.
Claim 23
Dependent Claim
44 words
A transient voltage protector comprising a housing, an inner and an outer electrode mounted within said housing such that said electrodes have surfaces spaced from each other, said spaced surfaces of said electrodes being coated with a substance comprising aluminum, magnesium and titanium hydride.
Claim 24
Dependent Claim
44 words
A transient voltage protector comprising a housing, an inner and an outer electrode mounted within said housing such that said electrodes have surfaces spaced from each other, said spaced surfaces of said electrodes being coated with a substance comprising aluminum, magnesium and titanium hydride.
Claim 25
Dependent Claim
28 words
The protector of claim 22 wherein said substance comprises from 80 to 95 percent aluminum by weight and approximately equal parts by weight of magnesium and titanium hydride.
Claim 26
Dependent Claim
26 words
The protector of claim 22 wherein said substance comprises aluminum 90.5 percent by weight, magnesium 4.75 percent by weight and titanium hydride 4.75 percent by weight.
Claim 27
Dependent Claim
20 words
The protector of claim 22 wherein the space between said electrodes is filled with a gas comprising hydrogen and argon.
Claim 28
Dependent Claim
20 words
The protector of claim 25 wherein said gas comprises 5 percent -30 percent hydrogen and 70 percent -95 percent argon.
Claim 29
Dependent Claim
16 words
The protector of claim 25 wherein said gas comprises 20 percent hydrogen and 80 percent argon.
Claim 30
Dependent Claim
13 words
The protector of claim 27 wherein said gas further comprises a radioactive substance.
Claim 31
Dependent Claim
11 words
The protector of claim 28 wherein said radioactive substance is krypton.
Claim 32
Dependent Claim
32 words
The protector of claim 22 wherein said electrodes are coaxial and wherein the outer surface of said inner electrOde and the spaced inner surface of said outer electrode comprise said spaced surfaces.
Claim 33
Dependent Claim
28 words
The protector of claim 30 wherein said substance comprises from 80 to 95 percent aluminum by weight and approximately equal parts by weight of magnesium and titanium hydride.
Claim 34
Dependent Claim
26 words
The protector of claim 31 wherein said substance comprises aluminum 90.5 percent by weight, magnesium 4.75 percent by weight and titanium hydride 4.75 percent by weight.
Claim 35
Dependent Claim
20 words
The protector of claim 32 wherein the space between said electrodes is filled with a gas comprising hydrogen and argon.
Claim 36
Dependent Claim
20 words
The protector of claim 33 wherein said gas comprises 5 percent -30 percent hydrogen and 70 percent -95 percent argon.
Claim 37
Dependent Claim
16 words
The protector of claim 34 wherein said gas comprises 20 percent hydrogen and 80 percent argon.
Claim 38
Dependent Claim
13 words
The protector of claim 35 wherein said gas further comprises a radioactive substance.
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |