Patent US3275891A successfully refreshed from Google Patents.
US3275891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triggered arc gap operable over a wide range of supply voltage variations
Assignee: Energy Systems Inc
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Filing: 1962-08-14
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Granted: 1966-09-27
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:18
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H02H9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A SYSTEM FOR PROTECTING A LOAD CIRCUIT FROM A HIGH VOLTAGE SOURCE WHEN A FAULT OCCURS IN THE LOAD CIRCUIT, COMPRISING: AN ARC GAP DISCHARGE ARRANGEMENT INCLUDING A PAIR OF OPPOSED SPHERICAL ELECTRODES AND AN INTERMEDIATE NEEDLE ELECTRODE; MEANS FOR CONNECTING SAID OPPOSED SPHERICAL ELECTRODES TO OPPOSITE TERMINALS OF SAID SOURCE FOR CAUSING AN ELECTRIC FIELD TO BE PRODUCED BETWEEN SAID OPPOSED ELECTRODES; SAID CONNECTING MEANS COMPRISING INDUCTANCE MEANS SERIALLY CONNECTED BETWEEN EACH OF SAID OPPOSED ELECTRODES AND A RESPECTIVE TERMINAL OF SAID SOURCE; SAID INTERMEDIATE ELECTRODE BEING PHYSICALLY DISPOSED ONLY ON AN EQUIPOTENTIAL SURFACE OF SAID ELECTRIC FIELD; MEANS FOR NORMALLY MAINTAINING SAID INTERMEDIATE ELECTRODE AT THE POTENTIAL OF SAID EQUIPOTENTIAL SURFACE WHEREBY SAID ELECTRIC FIELD BETWEEN SAID OPPOSED ELECTRODE IS NOT DISTURBED;
Claim 2
Independent Claim
124 words
A SYSTEM FOR PROTECTING A LOAD CIRCUIT FROM A HIGH VOLTAGE SOURCE WHEN A FAULT OCCURS IN THE LOAD CIRCUIT, COMPRISING: AN ARC GAP DISCHARGE ARRANGEMENT INCLUDING A PAIR OF OPPOSED SPHERICAL ELECTRODES AND AN INTERMEDIATE NEEDLE ELECTRODE; MEANS FOR CONNECTING SAID OPPOSED SPHERICAL ELECTRODES TO OPPOSITE TERMINALS OF SAID SOURCE FOR CAUSING AN ELECTRIC FIELD TO BE PRODUCED BETWEEN SAID OPPOSED ELECTRODES; SAID CONNECTING MEANS COMPRISING INDUCTANCE MEANS SERIALLY CONNECTED BETWEEN EACH OF SAID OPPOSED ELECTRODES AND A RESPECTIVE TERMINAL OF SAID SOURCE; SAID INTERMEDIATE ELECTRODE BEING PHYSICALLY DISPOSED ONLY ON AN EQUIPOTENTIAL SURFACE OF SAID ELECTRIC FIELD; MEANS FOR NORMALLY MAINTAINING SAID INTERMEDIATE ELECTRODE AT THE POTENTIAL OF SAID EQUIPOTENTIAL SURFACE WHEREBY SAID ELECTRIC FIELD BETWEEN SAID OPPOSED ELECTRODE IS NOT DISTURBED;
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |