Patent US3190949A successfully refreshed from Google Patents.
US3190949A
Expired / Lapsed
US
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Vacuum arc melting furnace with crucible changing apparatus
Assignee: WC Heraus GmbH and Co KG
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Filing: 1960-12-21
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Granted: 1965-06-22
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Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Gruber Helmut
- 👤 Scheidig Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:55
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/18; B; B22; B22D; B22D27/00; B22D27/15; C; C22; C22B; C22B4/00; C22B9/00; C22B9/16; C22B9/20; F27B; F27B14/00; F27B14/04; F27B5/00; F27B5/04; F27D11/00; F27D11/08; H; H05; H05B; H05B7/00; H05B7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A VACUUM ARC MELTING FURNACE COMPRISING AT LEAST TWO FURNACE CHAMBERS LATERALLY SPACED FROM EACH OTHER, AT LEAST FOUR CRUCIBLES, SUPPORT MEANS FOR SUPPORTING SAID CRUCIBLES AND ARRANGED BELOW SAID CHAMBERS, SAID CRUCIBLES BEING ARRANGED IN RADIALLY UNFORM POSITIONS ABOUT AND AT EQUAL DISTANCES FROM A VERTICAL AXIS WHICH IN TURN IS SPACED AT EQUAL DISTANCES FROM THE AXES OF SAID CHAMBERS, MEANS FOR INTERMITTENTLY ROTATING SAID SUPPORT MEANS IN ONE DIRECTION ABOUT SAID VERTICAL AXIS, CONTROL MEANS FOR CONTROLLING ROTATION OF SAID SUPPORT MEANS ABOUT SAID VERTICAL AXIS FOR SUCCESSIVELY MOVING EACH OF SAID CRUCIBLES FROM A POSITION UNDERNEATH AND LATERALLY OF ONE OF SAID FURNACE CHAMBERS TO A FILLING POSITION VERTICALLY UNDERNEATH SAID ONE CHAMBER, THEN TO AT LEAST ONE POSITION INTERMEDIATE SAID CHAMBERS AND LATERALLY OF SAID FILLING POSITION, IN WHICH INTERMEDIATE POSITION THE METAL IN THE CRUCIBLE THEREAT IS COOLED AND ADAPTED FOR NORMAL, THEN TO THE NEXT FILLING POSITION VERTICALLY UNDERNEATH THE OUTER OF SAID TWO FURNACE CHAMBERS, AND THEN TO THE NEXT INTER-
Claim 2
Dependent Claim
169 words
A VACUUM ARC MELTING FURNACE COMPRISING AT LEAST TWO FURNACE CHAMBERS LATERALLY SPACED FROM EACH OTHER, AT LEAST FOUR CRUCIBLES, SUPPORT MEANS FOR SUPPORTING SAID CRUCIBLES AND ARRANGED BELOW SAID CHAMBERS, SAID CRUCIBLES BEING ARRANGED IN RADIALLY UNFORM POSITIONS ABOUT AND AT EQUAL DISTANCES FROM A VERTICAL AXIS WHICH IN TURN IS SPACED AT EQUAL DISTANCES FROM THE AXES OF SAID CHAMBERS, MEANS FOR INTERMITTENTLY ROTATING SAID SUPPORT MEANS IN ONE DIRECTION ABOUT SAID VERTICAL AXIS, CONTROL MEANS FOR CONTROLLING ROTATION OF SAID SUPPORT MEANS ABOUT SAID VERTICAL AXIS FOR SUCCESSIVELY MOVING EACH OF SAID CRUCIBLES FROM A POSITION UNDERNEATH AND LATERALLY OF ONE OF SAID FURNACE CHAMBERS TO A FILLING POSITION VERTICALLY UNDERNEATH SAID ONE CHAMBER, THEN TO AT LEAST ONE POSITION INTERMEDIATE SAID CHAMBERS AND LATERALLY OF SAID FILLING POSITION, IN WHICH INTERMEDIATE POSITION THE METAL IN THE CRUCIBLE THEREAT IS COOLED AND ADAPTED FOR NORMAL, THEN TO THE NEXT FILLING POSITION VERTICALLY UNDERNEATH THE OUTER OF SAID TWO FURNACE CHAMBERS, AND THEN TO THE NEXT INTER-
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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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |