US3246373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic stirring device and method
Assignee: United States Steel Corp
•
Filing: 1962-06-22
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Granted: 1966-04-19
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Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Richard E Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:44
CPC Classifications
F; F27; F27D; F27D27/00; B; B01; B01F; B01F33/00; B01F33/45; B01F33/451; C; C22; C22B; C22B9/00; C22B9/16; C22B9/18; F27B; F27B3/00; F27B3/08; F27B3/085; H; H05; H05B; H05B6/00; H05B6/02; H05B6/34; B01F2101/00; B01F2101/45; F27D1/00; F27D1/12; F27D3/00; F27D2003/0034; F27D2003/0039; F27D99/00; F27D99/0001; F27D99/0006; F27D2099/0015; H05B2213/00; H05B2213/02; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE COMBINATION, WITH A CONSUMABLE ELECTRODE MELTING FURNACE WHICH INCLUDES A CRUCIBLE, A WATER JACKET SURROUNDING THE OUTSIDE OF SAID CRUCIBLE, AND AN ELECTRODE OF MAGNETIC MATERIAL SUSPENDED ABOVE SAID CRUCIBLE, WHEREBY THE MATERIAL OF SAID ELECTRODE CAN MELT AND DRIP INTO SAID CRUCIBLE TO FORM AN INGOT HAVING A POOL OF MOLTEN MATERIAL AT ITS TOP, OF A MAGNETIC STIRRING DEVICE COMPRISING AN ELECTROMAGNETIC COIL SURROUNDING THE OUTSIDE OF SAID WATER JACKET AND BEING OF AN AXIAL LENGTH LESS THAN ITS OWN OUTSIDE DIAMETER, MEANS CONSTRAINING SAID COIL AGAINST ROTATION ABOUT ITS AXIS, AND MEANS SUPPORTING SAID COIL FOR PHYSICALLY RAISING AND LOWERING IT WITH RESPECT TO SAID CRUCIBLE TO MAINTAIN THE CENTROID OF SAID COIL BELOW THE UPPER SURFACE OF THE POOL, SAID COIL PRODUCING VERTICAL LINES OF MAGNETIC FORCE HAVING A FLUX DENSITY OF 30 TO 300 GAUSS AT ITS CENTROID WHILE CARRYING A CURRENT OF 40 TO 160 AMPERES.
Claim 2
Dependent Claim
153 words
THE COMBINATION, WITH A CONSUMABLE ELECTRODE MELTING FURNACE WHICH INCLUDES A CRUCIBLE, A WATER JACKET SURROUNDING THE OUTSIDE OF SAID CRUCIBLE, AND AN ELECTRODE OF MAGNETIC MATERIAL SUSPENDED ABOVE SAID CRUCIBLE, WHEREBY THE MATERIAL OF SAID ELECTRODE CAN MELT AND DRIP INTO SAID CRUCIBLE TO FORM AN INGOT HAVING A POOL OF MOLTEN MATERIAL AT ITS TOP, OF A MAGNETIC STIRRING DEVICE COMPRISING AN ELECTROMAGNETIC COIL SURROUNDING THE OUTSIDE OF SAID WATER JACKET AND BEING OF AN AXIAL LENGTH LESS THAN ITS OWN OUTSIDE DIAMETER, MEANS CONSTRAINING SAID COIL AGAINST ROTATION ABOUT ITS AXIS, AND MEANS SUPPORTING SAID COIL FOR PHYSICALLY RAISING AND LOWERING IT WITH RESPECT TO SAID CRUCIBLE TO MAINTAIN THE CENTROID OF SAID COIL BELOW THE UPPER SURFACE OF THE POOL, SAID COIL PRODUCING VERTICAL LINES OF MAGNETIC FORCE HAVING A FLUX DENSITY OF 30 TO 300 GAUSS AT ITS CENTROID WHILE CARRYING A CURRENT OF 40 TO 160 AMPERES.
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |