Patent US3413401A successfully refreshed from Google Patents.
US3413401A
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Method and apparatus for melting metals by induction heating
Assignee: Northwestern Steel and Wire Co
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Filing: 1966-02-02
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Granted: 1968-11-26
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Expires: 1986-02-02
Abstract
No abstract record available.
Inventors
- 👤 Paul W Dillon
- 👤 Charles G Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:33
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5241; F; F27; F27D; F27D3/00; F27D3/18; C21C5/5252; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF CONTINUOUSLY MELTING MELTABLE METALS COMPRISING THE STEPS OF: PROVIDING A MELTING CHUTE OF A NON-CONDUCTING NONMAGNETIC MATERIAL HAVING AN INLET AT ONE END THEREOF AND A REDUCED CROSS-SECTIONAL AREA OUTLET AT THE OPPOSITE END THEREOF, INTRODUCING A MELTABLE METAL INTO THE CHUTE TO A COMPACTING LEVEL AND CONTINUING THE INTRODUCTION OF MELTABLE METAL INTO THE CHUTE AND CONTINUOUSLY EXERTING AN EXTERNAL FORCE ON THE MELTABLE METAL AS INTRODUCED AND THEREBY COMPACTING THE MELTABLE METAL, MELTING THE MELTABLE METAL BY THE EDDY CURRENTS IN THE CHARGE INDUCED BY HIGH FREQUENCY INDUCTION POWER, AND CONTINUOUSLY FLOWING THE MELTED METAL FROM THE DISCHARGE END OF THE CHUTE.
Claim 2
Independent Claim
107 words
A METHOD OF CONTINUOUSLY MELTING MELTABLE METALS COMPRISING THE STEPS OF: PROVIDING A MELTING CHUTE OF A NON-CONDUCTING NONMAGNETIC MATERIAL HAVING AN INLET AT ONE END THEREOF AND A REDUCED CROSS-SECTIONAL AREA OUTLET AT THE OPPOSITE END THEREOF, INTRODUCING A MELTABLE METAL INTO THE CHUTE TO A COMPACTING LEVEL AND CONTINUING THE INTRODUCTION OF MELTABLE METAL INTO THE CHUTE AND CONTINUOUSLY EXERTING AN EXTERNAL FORCE ON THE MELTABLE METAL AS INTRODUCED AND THEREBY COMPACTING THE MELTABLE METAL, MELTING THE MELTABLE METAL BY THE EDDY CURRENTS IN THE CHARGE INDUCED BY HIGH FREQUENCY INDUCTION POWER, AND CONTINUOUSLY FLOWING THE MELTED METAL FROM THE DISCHARGE END OF THE CHUTE.
References Cited (Backward Citations)
US1318164A
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US2362701A
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US2359578A
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US2754346A
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US3372223A
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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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |