Patent US3376458A successfully refreshed from Google Patents.
US3376458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark gap device
Assignee: General Electric Co
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Filing: 1965-11-22
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Granted: 1968-04-02
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Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Tseng W Liao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:05
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/10; H01T4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A SPARK GAP DEVICE COMPRISING: (A) A PAIR OF SPACED-APART METALLIC ARC RUNNERS, EACH BEING AN ELONGATED BAR-LIKE MEMBER, (B) MEANS FOR ESTABLISHING AN ELECTRIC ARC ACROSS THE GAP BETWEEN SAID RUNNERS WITH ONE ARC TERMINAL ON ONE RUNNER AND THE OTHER ARC TERMINAL ON THE OTHER RUNNER, (C) MEANS FOR RAPIDLY DRIVING SAID ARC TERMINALS ALONG THE LENGTH OF THEIR RESPECTIVE RUNNERS (D) A PAIR OF SIDEWALLS OF INSULATING MATERIAL EXTENDING BETWEEN SAID RUNNERS AT OPPOSITE EDGES THEREOF AND GENERALLY PARALLEL TO SAID ARC, (E) EACH OF SAID ARC RUNNERS COMPRISING A BASE AND A PORTION PROJECTING FROM SAID BASE TOWARD THE OTHER OF SAID ARC RUNNERS, SAID BASE AND SAID PROJECTING PORTION BOTH EXTENDING ALONG THE LENGTH OF SAID RUNNER, (F) ARC-TERMINAL-LOCATING MEANS DEFINING AN ARCING ZONE AT THE FREE END OF SAID PROJECTING PORTIONS WHERE THE ARC IS MAINTAINED WHILE ON SAID RUNNERS, (G) SAID PROJECTING PORTIONS BEING SPACED FROM BOTH OF SAID SIDEWALLS SO THAT THE SHORTEST CREEPAGE PATH BETWEEN SAID ARC RUNNERS ON A SIDEWALL SURFACE EXTENDS BETWEEN SAID BASES ALONGSIDE AND SPACED FROM SAID PROJECTING PORTIONS, (H) SAID ARC RUNNERS BEING SO SHAPED THAT ANY STRAIGHT LINE PATH EXTENDING BETWEEN SAID ARCING ZONE AND THE PORTIONS OF SAID CREEPAGE PATH EXTENDING ALONGSIDE SAID PROJECTING PORTIONS ADJACENT SAID BASES IS INTERSECTED BY ONE OF SAID ARC RUNNERS.
Claim 2
Dependent Claim
222 words
A SPARK GAP DEVICE COMPRISING: (A) A PAIR OF SPACED-APART METALLIC ARC RUNNERS, EACH BEING AN ELONGATED BAR-LIKE MEMBER, (B) MEANS FOR ESTABLISHING AN ELECTRIC ARC ACROSS THE GAP BETWEEN SAID RUNNERS WITH ONE ARC TERMINAL ON ONE RUNNER AND THE OTHER ARC TERMINAL ON THE OTHER RUNNER, (C) MEANS FOR RAPIDLY DRIVING SAID ARC TERMINALS ALONG THE LENGTH OF THEIR RESPECTIVE RUNNERS (D) A PAIR OF SIDEWALLS OF INSULATING MATERIAL EXTENDING BETWEEN SAID RUNNERS AT OPPOSITE EDGES THEREOF AND GENERALLY PARALLEL TO SAID ARC, (E) EACH OF SAID ARC RUNNERS COMPRISING A BASE AND A PORTION PROJECTING FROM SAID BASE TOWARD THE OTHER OF SAID ARC RUNNERS, SAID BASE AND SAID PROJECTING PORTION BOTH EXTENDING ALONG THE LENGTH OF SAID RUNNER, (F) ARC-TERMINAL-LOCATING MEANS DEFINING AN ARCING ZONE AT THE FREE END OF SAID PROJECTING PORTIONS WHERE THE ARC IS MAINTAINED WHILE ON SAID RUNNERS, (G) SAID PROJECTING PORTIONS BEING SPACED FROM BOTH OF SAID SIDEWALLS SO THAT THE SHORTEST CREEPAGE PATH BETWEEN SAID ARC RUNNERS ON A SIDEWALL SURFACE EXTENDS BETWEEN SAID BASES ALONGSIDE AND SPACED FROM SAID PROJECTING PORTIONS, (H) SAID ARC RUNNERS BEING SO SHAPED THAT ANY STRAIGHT LINE PATH EXTENDING BETWEEN SAID ARCING ZONE AND THE PORTIONS OF SAID CREEPAGE PATH EXTENDING ALONGSIDE SAID PROJECTING PORTIONS ADJACENT SAID BASES IS INTERSECTED BY ONE OF SAID ARC RUNNERS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |