US3649874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overvoltage arrester
Assignee: Siemens AG
•
Filing: 1970-08-26
•
Granted: 1972-03-14
•
Expires: 1990-08-26
Abstract
Abstract Electrode material which is evaporated during overvoltage arresting is prevented from forming in an area between electrodes, the area being shaded by overlapping parts of the overvoltage arrester. In one embodiment the shaded area is formed between an electrode and a ceramic ring having a T-shaped cross section, and in another embodiment between an electrode support member and a ceramic ring. In each embodiment the ceramic ring and the electrodes form a casing for the arrester.
Inventors
- 👤 Gerhard Peche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:42
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/58; H01T4/00; H01T4/10; H01T4/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
An overvoltage arrester in a gastight housing including a first electrode and a second electrode arranged opposite one another and a ring-shaped ceramic insulating member which together with said electrodes forms said housing and means providing a vacuumtight ceramic to metal connection, the improvement therein wherein said means providing said vacuumtight ceramic to metal connection includes portions of said electrodes which surround and embrace said insulating member and including glass at the transitions between said electrodes and said insulating member forming a pressure connection.
Claim 2
Dependent Claim
84 words
An overvoltage arrester in a gastight housing including a first electrode and a second electrode arranged opposite one another and a ring-shaped ceramic insulating member which together with said electrodes forms said housing and means providing a vacuumtight ceramic to metal connection, the improvement therein wherein said means providing said vacuumtight ceramic to metal connection includes portions of said electrodes which surround and embrace said insulating member and including glass at the transitions between said electrodes and said insulating member forming a pressure connection.
Claim 3
Dependent Claim
66 words
An overvoltage arrester as set forth in claim 1, wherein said arrester has a longitudinal axis, said ceramic ring member includes a pair of first annular surface facing away from said axis and said first and second electrodes includes a pair of second annular surfaces respectively spaced from said first annular surfaces to form a pair of annular slots, said glass portions disposed in said slots.
Claim 4
Dependent Claim
88 words
An overvoltage arrester according to claim 2, wherein said ceramic ring member has a T-shaped cross section with the horizontal member of the T directed vertically parallel to said axis, said second electrode includes a longitudinal cylinder and an end cap, said end cap sealed to said ceramic ring member by means of a respective glass portion, said cylinder extending through said ring member, said first electrode shaped as a cup sealed to said ring member by means of a respective glass portion and receiving therein sAid cylinder.
Claim 5
Dependent Claim
88 words
An overvoltage arrester according to claim 1, wherein said first electrode includes a metal rod and an end cap mounting said rod and having a V-shaped bulge directed generally along the direction of said rod, said second electrode is cap shaped and receives said rod therein and spaced therefrom, a symmetrical annular member mounting said second electrode, a first of said glass portions sealing said end cap to said ceramic ring member and a second of said electrodes sealing said ceramic ring member to said symmetrical mounting member.
References Cited (Backward Citations)
US3454811A
Cited
US3538382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |