US3280286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-type circuit interrupter
Assignee: McGraw Edison Co
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Filing: 1964-07-03
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Granted: 1966-10-18
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Expires: 1984-07-03
Abstract
No abstract record available.
Inventors
- 👤 John W Ranheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:33
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/664; H01H33/6643
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A VACUUM-TYPE CIRCUIT INTERRUPTER INCLUDING AN EVACUATED ENVELOPE, A PAIR OF ENGAGEABLE ELECTRODES DISPOSED WITHIN SAID ENVELOPE, AN ARCING CONTACT ON THE END OF EACH OF SAID ELECTRODES AND DISPOSED IN AN OPPOSED RELATION FOR HAVING AN ARC DRAWN THEREBETWEEN WHEN SAID ELECTRODES ARE OUT OF ENGAGEMENT, AT LEAST ONE OF SAID CONTACTS BEING GENERALLY DISC-SHAPED AND HAVING ONE SIDE FACING THE OTHER OF SAID CONTACTS, AT LEAST ONE ELONGATE SLOT FORMED THROUGH SAID ONE CONTACT AND EXTENDING AROUND THE CENTER THEREOF AD FROM AN INTERIOR POSITION OUTWARDLY TOWARD THE OUTER PERIPHERY OF SAID ONE CONTACT, SAID OUTER PERIPHERY BEING CONTINUOUS AND CLOSING THE OUTER END OF SAID SLOT, SAID ONE CONTACT HAVING A FLAT SURFACE THEREON AND ADJACENT ITS OUTER PERIPHERY FOR ENGAGING THE OTHER OF SAID CONTACTS, THE CURRENT PATH PROVIDED IN SAID ONE CONTACT AROUND SAID SLOT PRODUCING MAGNETIC FIELD WHICH FORCES SAID ARC TO TRAVEL RAPIDLY ALONG SAID OUTER PERIPHERY.
Claim 2
Dependent Claim
155 words
IN A VACUUM-TYPE CIRCUIT INTERRUPTER INCLUDING AN EVACUATED ENVELOPE, A PAIR OF ENGAGEABLE ELECTRODES DISPOSED WITHIN SAID ENVELOPE, AN ARCING CONTACT ON THE END OF EACH OF SAID ELECTRODES AND DISPOSED IN AN OPPOSED RELATION FOR HAVING AN ARC DRAWN THEREBETWEEN WHEN SAID ELECTRODES ARE OUT OF ENGAGEMENT, AT LEAST ONE OF SAID CONTACTS BEING GENERALLY DISC-SHAPED AND HAVING ONE SIDE FACING THE OTHER OF SAID CONTACTS, AT LEAST ONE ELONGATE SLOT FORMED THROUGH SAID ONE CONTACT AND EXTENDING AROUND THE CENTER THEREOF AD FROM AN INTERIOR POSITION OUTWARDLY TOWARD THE OUTER PERIPHERY OF SAID ONE CONTACT, SAID OUTER PERIPHERY BEING CONTINUOUS AND CLOSING THE OUTER END OF SAID SLOT, SAID ONE CONTACT HAVING A FLAT SURFACE THEREON AND ADJACENT ITS OUTER PERIPHERY FOR ENGAGING THE OTHER OF SAID CONTACTS, THE CURRENT PATH PROVIDED IN SAID ONE CONTACT AROUND SAID SLOT PRODUCING MAGNETIC FIELD WHICH FORCES SAID ARC TO TRAVEL RAPIDLY ALONG SAID OUTER PERIPHERY.
References Cited (Backward Citations)
US2949520A
Cited
US3182156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |