Patent US5388023A successfully refreshed from Google Patents.
US5388023A
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Gas-disccharge overvoltage arrester
Assignee: TDK Electronics AG
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Filing: 1993-09-28
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Granted: 1995-02-07
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Expires: 2013-09-28
Abstract
Abstract A gas-filled three-electrode overvoltage arrester may be developed in such a manner that it has dependable "fail-safe" and "vent-safe" behavior. For this purpose, a two-arm spring clip (10) is fastened to the center electrode (1). The ends of the two-arm spring clip (10) rest, with the interpositioning of a spacer (20, 21; 22, 23), against the ends of the end electrodes (2, 3). The end of each arm of the spring clip bears a cap (14, 15) which is provided with a flange-like edge (16, 17). One end of the connecting wire (6, 7) of each end electrode has the shape of a ring (61, 71) which is fastened at the end side to the end electrode. The ring of the connecting wire and the flange-like edge of the cap are opposite each other and are held apart by a disk-shaped fusible pellet (20, 22) and a cylindrical part (21, 23) having insulating properties. The cylindrical part consists either of a temperature-resistant insulating material or of a metal-oxide varistor.
Inventors
- 👤 Jurgen Boy
- 👤 Axel Hahndorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:04
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/14; H01C; H01C7/00; H01C7/10; H01C7/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A gas discharge overvoltage arrester comprising: two hollow-cylindrical insulating members; a ring-shaped center electrode arranged between said two hollow-cylindrical insulating members; two end electrodes respectively arranged at ends of the two hollow-cylindrical insulating members; a two-arm spring clip fastened on the center electrode in connection with which the ends of the arms rest against the ends of the end electrodes with the interposition of a spacer; wherein the center electrode and the end electrodes are provided with radially extended connections, the connection of each end electrode at the arrester end has a shape of a ring which is fastened at the end to the end electrode, the end of each arm of the spring clip bearing a cap, the cap being provided with a flange-like edge the diameter of which corresponds to the diameter of the ring-shaped connection; and wherein the spacer between each end electrode and the cap comprises a disk-shaped fusible pellet and a cylindrical part having insulating properties, an outside diameter of the fusible pellet and an outside diameter of the cylindrical part being smaller than an inside diameter of the cap.
Claim 2
Dependent Claim
185 words
A gas discharge overvoltage arrester comprising: two hollow-cylindrical insulating members; a ring-shaped center electrode arranged between said two hollow-cylindrical insulating members; two end electrodes respectively arranged at ends of the two hollow-cylindrical insulating members; a two-arm spring clip fastened on the center electrode in connection with which the ends of the arms rest against the ends of the end electrodes with the interposition of a spacer; wherein the center electrode and the end electrodes are provided with radially extended connections, the connection of each end electrode at the arrester end has a shape of a ring which is fastened at the end to the end electrode, the end of each arm of the spring clip bearing a cap, the cap being provided with a flange-like edge the diameter of which corresponds to the diameter of the ring-shaped connection; and wherein the spacer between each end electrode and the cap comprises a disk-shaped fusible pellet and a cylindrical part having insulating properties, an outside diameter of the fusible pellet and an outside diameter of the cylindrical part being smaller than an inside diameter of the cap.
Claim 3
Dependent Claim
32 words
A gas discharge overvoltage arrester according to claim 1, wherein the cylindrical part comprises a temperature-resistant insulating material and the fusible pellet is arranged between the end electrode and the cylindrical part.
Claim 4
Dependent Claim
55 words
A gas discharge overvoltage arrester according to claim 1, wherein the cylindrical part is formed of a metal-oxide varistor, a response voltage of which is greater than a response voltage of the overvoltage arrester, the end sides of the metal-oxide varistor being metallized and the rest of the surface being sealed with a moisture-repelling substance.
Claim 5
Dependent Claim
23 words
A gas discharge overvoltage arrester according to claim 3, wherein an insulating intermediate layer is applied to the outer surface of the varistor.
Claim 6
Dependent Claim
19 words
A gas discharge overvoltage arrestor according to claim 1, wherein the cylindrical part comprises a temperature resistant insulating material.
Claim 7
Dependent Claim
26 words
A gas discharge overvoltage arrestor according to claim 5, wherein the temperature resistant insulating material comprises at least one of a group including plexiglas and ceramic.
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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) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |