Patent US4228478A successfully refreshed from Google Patents.
US4228478A
Expired / Lapsed
US
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Overvoltage arrester
Assignee: Siemens AG
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Filing: 1978-03-28
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Granted: 1980-10-14
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Expires: 1998-03-28
Abstract
Abstract An overvoltage arrester wherein the arrester comprises an insulating housing which encloses a body of cast resin in which is embedded a voltage dependent resistor and a first connecting device, a portion of which protrudes from the resin body and extends out of the housing. The arrester is further provided with a spark gap formed as a separate unit and a second connecting device anchored to the spark gap, both of the latter elements also being disposed in the housing.
Inventors
- 👤 Werner Jakszt
- 👤 Klaus Reichelt
- 👤 Gert Schiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:56
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H02H9/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
An overvoltage arrester for use in protecting machines and transformers comprising: an insulating housing; a voltage dependent resistor in said housing; a first connecting device connected to said resistor and having a protruding portion which extends out of said housing; a spark gap, formed as a separate unit, disposed in said housing, and having an outer diameter which corresponds to the inner diameter of the housing, said spark gap comprising a body of hardened cast resin in which a plurality of electrodes, a plurality of spacer washers arranged between said electrodes, and another connecting device are embedded; and a body of resin cast in said housing and on said spark gap in which said resistor body of a portion of said first connecting device are embedded.
Claim 2
Dependent Claim
126 words
An overvoltage arrester for use in protecting machines and transformers comprising: an insulating housing; a voltage dependent resistor in said housing; a first connecting device connected to said resistor and having a protruding portion which extends out of said housing; a spark gap, formed as a separate unit, disposed in said housing, and having an outer diameter which corresponds to the inner diameter of the housing, said spark gap comprising a body of hardened cast resin in which a plurality of electrodes, a plurality of spacer washers arranged between said electrodes, and another connecting device are embedded; and a body of resin cast in said housing and on said spark gap in which said resistor body of a portion of said first connecting device are embedded.
Claim 3
Dependent Claim
17 words
An overvoltage arrester in accordance with claim 1 wherein: said housing comprises a circular cylndrical plastic tube.
Claim 4
Dependent Claim
38 words
An overvoltage arrester in accordance with claim 1 wherein: said voltage dependent resistor comprises: a further housing; a voltage dependent resistor arranged in said further housing; and contact elements arranged on opposite sides of said voltage dependent resistor.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |