US3213495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for preventing segregation in vacuum arc melting
Assignee: Crucible Steel Company of America
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Filing: 1962-08-24
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Granted: 1965-10-26
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Expires: 1982-08-24
Abstract
No abstract record available.
Inventors
- 👤 Russell C Buehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A CONSUMABLE ELECTRODE ELECTRIC ARC FURNACE COMPRISING MEANS TO SUPPORT THE ELECTRODE, FIRS MEANS SURROUNDING A LOWER PORTION OF THE ELECTRODE AND DEFINING A MOLD CAVITY FOR RECEPTION OF METAL MELTED FROM THE ELECTRODE BY AN ELECTRIC CURRENT-CARRYING ARC, SECOND MEANS TO PROVIDE AN ELECTRODE MELTING CURRENT-CARRYING ARC BETWEEN THE ELECTRODE AND METAL CONTAINED WITHIN SAID CAVITY, SAID FIRST MEANS COMPRISING AN INNER SLEEVE AND AN OUTER SLEEVE, SAID SLEEVES BEING CONCENTRICALLY SPACED APART TO DEFINE A FLUID-COOLING PASSAGE, SAID FIRST MEANS ALSO COMPRISING A FERROMAGNETIC PORTION SURROUNDING THE MOLD CAVITY AND POSITIONED SUFFICIENTLY CLOSE TO SAID CAVITY TO INTERACT WITH AN OPERATIVE ELECTRODE-MELTING ARC CURRENT TO CREATE AN ELECTROMAGNETIC FIELD WITHIN THE MOLD CAVITY DURING MELTING OF THE ELECTRODE, AND SAID FERROMAGNETIC PORTION HAVING A PERMEABILITY SUCH THAT SAID PORTION IS INCOMPLETELY SATURATED AT THE FLUX DENSITY OF SAID ELECTROMAGNETIC FIELD.
Claim 2
Dependent Claim
142 words
A CONSUMABLE ELECTRODE ELECTRIC ARC FURNACE COMPRISING MEANS TO SUPPORT THE ELECTRODE, FIRS MEANS SURROUNDING A LOWER PORTION OF THE ELECTRODE AND DEFINING A MOLD CAVITY FOR RECEPTION OF METAL MELTED FROM THE ELECTRODE BY AN ELECTRIC CURRENT-CARRYING ARC, SECOND MEANS TO PROVIDE AN ELECTRODE MELTING CURRENT-CARRYING ARC BETWEEN THE ELECTRODE AND METAL CONTAINED WITHIN SAID CAVITY, SAID FIRST MEANS COMPRISING AN INNER SLEEVE AND AN OUTER SLEEVE, SAID SLEEVES BEING CONCENTRICALLY SPACED APART TO DEFINE A FLUID-COOLING PASSAGE, SAID FIRST MEANS ALSO COMPRISING A FERROMAGNETIC PORTION SURROUNDING THE MOLD CAVITY AND POSITIONED SUFFICIENTLY CLOSE TO SAID CAVITY TO INTERACT WITH AN OPERATIVE ELECTRODE-MELTING ARC CURRENT TO CREATE AN ELECTROMAGNETIC FIELD WITHIN THE MOLD CAVITY DURING MELTING OF THE ELECTRODE, AND SAID FERROMAGNETIC PORTION HAVING A PERMEABILITY SUCH THAT SAID PORTION IS INCOMPLETELY SATURATED AT THE FLUX DENSITY OF SAID ELECTROMAGNETIC FIELD.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |