US3372224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for consumable electrode arc melting furnace to raise the electrode upon a power failure
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1964-09-15
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Granted: 1968-03-05
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Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Harold S Jackson
- 👤 Jr James B Murtland
- 👤 Charles F Rebhun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:00
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/18; H; H05; H05B; H05B7/00; H05B7/005; H05B7/02; H05B7/10; H05B7/109; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A COMSUMABLE ELECTRODE FURNACE OF THE TYPE IN WHICH AN ARC NORMALLY EXISTS BETWEEN A CONSUMABLE ELECTRODE AND A MOLTEN POOL OF METAL BENEATH IT BY VIRTUE OF THE APPLICATION OF ELECTRICAL POWER BETWEEN THE ELECTRODE AND THE POOL TO CREATE ARC VOLTAGE AND ARC CURRENT; THE IMPROVEMENT OF APPARATUS FOR MOVING THE ELECTRODE UPWARDLY AND AWAY FROM THE POOL UPON FAILURE OF SAID POWER SOURCE, COMPRISING MEANS FOR SENSING ARC CURRENT, MEANS FOR SENSING ARC VOLTAGE, AND MECHANISM OPERABLE IN RESPONSE TO THE ABSENCE OF BOTH ARC CURRENT AND ARC VOLTAGE FOR CAUSING THE ELECTRODE TO MOVE UPWARDLY AND AWAY FROM THE POOL.
Claim 2
Dependent Claim
105 words
IN A COMSUMABLE ELECTRODE FURNACE OF THE TYPE IN WHICH AN ARC NORMALLY EXISTS BETWEEN A CONSUMABLE ELECTRODE AND A MOLTEN POOL OF METAL BENEATH IT BY VIRTUE OF THE APPLICATION OF ELECTRICAL POWER BETWEEN THE ELECTRODE AND THE POOL TO CREATE ARC VOLTAGE AND ARC CURRENT; THE IMPROVEMENT OF APPARATUS FOR MOVING THE ELECTRODE UPWARDLY AND AWAY FROM THE POOL UPON FAILURE OF SAID POWER SOURCE, COMPRISING MEANS FOR SENSING ARC CURRENT, MEANS FOR SENSING ARC VOLTAGE, AND MECHANISM OPERABLE IN RESPONSE TO THE ABSENCE OF BOTH ARC CURRENT AND ARC VOLTAGE FOR CAUSING THE ELECTRODE TO MOVE UPWARDLY AND AWAY FROM THE POOL.
References Cited (Backward Citations)
US2456936A
Cited
US2942045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |