Patent US3215799A successfully refreshed from Google Patents.
US3215799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic trip structure for high speed circuit breakers
Assignee: ABB Inc USA
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Filing: 1961-05-02
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Granted: 1965-11-02
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Expires: 1981-05-02
Abstract
No abstract record available.
Inventors
- 👤 Challiss I Clausing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:20
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A MAGNETIC LATCH FOR SELECTIVELY HOLDING AND INSTANTANEOUSLY RELEASING AN ARMATURE UPON THE OCCURRENCE OF A FALUT CURRENT OF EITHER FORWARD OR REVERSE CURRENT DIRECTION COMPRISING A MAGNETIC MEMBER HAVING FIRST AND SECOND INDEPENDENT MAGNETIC CIRCUITS, POLARIZING MEANS FOR GENERATING FIRST AND SECOND PATHS OF MAGNETIC FLUX IN SAID FIRST AND SECOND MAGNETIC CIRCUITS, THE FLUX DENSITY OF SAID FLUX PATHS BEING SUFFICIENT TO SEAL SAID ARMATURE TO SAID MAGNETIC MEMBER, SECOND MEANS FOR GENERATING A THIRD FLUX PATH IN SAID MAGNETIC MEMBER IN RESPONSE TO THE FAULT CURRENT FLOWING THERETHROUGH, SAID THIRD FLUX PATH BEING ADAPTED TO OPPOSE SAID SECOND FLUX PATH IN RESPONSE TO THE FAULT CURRENT OF SAID FORWARD DIRECTION AND TO OPPOSE AND FIRST FLUX PATH IN RESPONSE TO FAULT CURRENT OF SAID REVERSE DIRECTION.
Claim 2
Dependent Claim
129 words
A MAGNETIC LATCH FOR SELECTIVELY HOLDING AND INSTANTANEOUSLY RELEASING AN ARMATURE UPON THE OCCURRENCE OF A FALUT CURRENT OF EITHER FORWARD OR REVERSE CURRENT DIRECTION COMPRISING A MAGNETIC MEMBER HAVING FIRST AND SECOND INDEPENDENT MAGNETIC CIRCUITS, POLARIZING MEANS FOR GENERATING FIRST AND SECOND PATHS OF MAGNETIC FLUX IN SAID FIRST AND SECOND MAGNETIC CIRCUITS, THE FLUX DENSITY OF SAID FLUX PATHS BEING SUFFICIENT TO SEAL SAID ARMATURE TO SAID MAGNETIC MEMBER, SECOND MEANS FOR GENERATING A THIRD FLUX PATH IN SAID MAGNETIC MEMBER IN RESPONSE TO THE FAULT CURRENT FLOWING THERETHROUGH, SAID THIRD FLUX PATH BEING ADAPTED TO OPPOSE SAID SECOND FLUX PATH IN RESPONSE TO THE FAULT CURRENT OF SAID FORWARD DIRECTION AND TO OPPOSE AND FIRST FLUX PATH IN RESPONSE TO FAULT CURRENT OF SAID REVERSE DIRECTION.
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |