US3371142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance melting furnace
Assignee: Howmet Turbine Components Corp
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Filing: —
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Granted: 1968-02-27
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Expires: 1985-02-27
Abstract
No abstract record available.
Inventors
- 👤 Henry W Soller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:41
CPC Classifications
B; B22; B22C; B22C13/00; B22C13/08; F; F27; F27D; F27D11/00; F27D11/02; H; H05; H05B; H05B3/00; H05B3/62; H05B3/66; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A RESISTANCE MELTING FURNACE HAVING A CRUCIBLE FOR MELTING WHICH IS MOUNTED FOR ROTATION ABOUT A HORIZONTAL AXIS, THE IMPROVEMENT IN A CARBON RESISTANCE HEATING ELEMENT IN COMBINATION THEREWITH COMPRISING TWO END PORTIONS EXTENDING INTO THE CRUCIBLE FROM OPPOSITE SIDES THEREOF, A PLURALITY OF SEPARATE INTERMEDIATE PORTIONS SUPPORTED BETWEEN SAID END PORTIONS TO FORM AN ELONGATED HEATING ELEMENT SUSPENDED HORIZONTALLY ACROSS AND WITHIN SAID CRUCIBLE, SAID INTERMEDIATE PORTIONS HAVING ADJACENT END PORTIONS JOINED TOGETHER IN MATCHING SURFACE-TO-SURFACE CONTACT TO PROVIDE RESISTANCE HEATING WITHOUT ARCING THEREBETWEEN, AND A PLURALITY OF CONTACT RESISTANCE INTERFACES DEFINED BETWEEN ADJOINING SURFACES OF SUCH END PORTIONS AND POSITIONED WITHIN THE HEATING ELEMENT ALONG A PORTION THEREOF LOCATED WITHIN THE CRUCIBLE TO PROVIDE INTERNAL THERMAL AND ELECTRICAL RESISTANCES IN THE HEATING ELEMENT GREATER THAN THOSE OF A SIMILAR SHAPED ELEMENT CONSTRUCTED IN ONE PIECE.
Claim 2
Dependent Claim
138 words
IN A RESISTANCE MELTING FURNACE HAVING A CRUCIBLE FOR MELTING WHICH IS MOUNTED FOR ROTATION ABOUT A HORIZONTAL AXIS, THE IMPROVEMENT IN A CARBON RESISTANCE HEATING ELEMENT IN COMBINATION THEREWITH COMPRISING TWO END PORTIONS EXTENDING INTO THE CRUCIBLE FROM OPPOSITE SIDES THEREOF, A PLURALITY OF SEPARATE INTERMEDIATE PORTIONS SUPPORTED BETWEEN SAID END PORTIONS TO FORM AN ELONGATED HEATING ELEMENT SUSPENDED HORIZONTALLY ACROSS AND WITHIN SAID CRUCIBLE, SAID INTERMEDIATE PORTIONS HAVING ADJACENT END PORTIONS JOINED TOGETHER IN MATCHING SURFACE-TO-SURFACE CONTACT TO PROVIDE RESISTANCE HEATING WITHOUT ARCING THEREBETWEEN, AND A PLURALITY OF CONTACT RESISTANCE INTERFACES DEFINED BETWEEN ADJOINING SURFACES OF SUCH END PORTIONS AND POSITIONED WITHIN THE HEATING ELEMENT ALONG A PORTION THEREOF LOCATED WITHIN THE CRUCIBLE TO PROVIDE INTERNAL THERMAL AND ELECTRICAL RESISTANCES IN THE HEATING ELEMENT GREATER THAN THOSE OF A SIMILAR SHAPED ELEMENT CONSTRUCTED IN ONE PIECE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |