Patent US3179734A successfully refreshed from Google Patents.
US3179734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for melting furnace
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1962-07-10
•
Granted: 1965-04-20
•
Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Redel Karl-Georg
- 👤 Main Kreis Hanau Am
- 👤 Samietz Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:48
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/228; H; H05; H05B; H05B7/00; H05B7/02; H05B7/10; H05B7/109; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A MELTING FURNACE HAVING A FURNACE CHAMBER, A CRUCIBLE IN SAID CHAMBER, A CONSUMABLE ELECTRODE AT LEAST PARTLY WITHIN SAID CHAMBER, HEATING MEANS FOR PROGRESSIVELY MELTING OFF THE LOWER END OF SAID CONSUMABLE ELECTRODE INTO SAID CRUCIBLE, AND MEANS FOR FEEDING SAID CONSUMABLE ELECTRODE IN THE DIRECTION TOWARD SAID CRUCIBLE, AT LEAST ONE ELEMENT HAVING AN ELECTRICAL RESISTANCE VARYING IN PROPORTION TO ITS DEFORMATION, MEANS FOR CONNECTING SAID ELEMENT TO SAID FEEDING MEANS SO AS TO BE ACTED UPON BY THE WEIGHT OF SAID CONSUMABLE ELECTRODE AND TO BE DEFORMED THEREBY, AND ELECTRIC CIRCUIT MEANS CONNECTED TO SAID ELEMENT AND INCLUDING A SOURCE OF CURRENT AND ELECTRIC MEANS FOR DETERMINING THE ELECTRICAL RESISTANCE OF SAID ELEMENT AND THE CHANGES IN SAID RESISTANCE DUE TO THE VARYING DEFORMATION OF SAID ELEMENT CAUSED BY THE CHANGING WEIGHT OF SAID CONSUMABLE ELECTRODE WHILE BEING MELTED.
Claim 2
Dependent Claim
143 words
IN A MELTING FURNACE HAVING A FURNACE CHAMBER, A CRUCIBLE IN SAID CHAMBER, A CONSUMABLE ELECTRODE AT LEAST PARTLY WITHIN SAID CHAMBER, HEATING MEANS FOR PROGRESSIVELY MELTING OFF THE LOWER END OF SAID CONSUMABLE ELECTRODE INTO SAID CRUCIBLE, AND MEANS FOR FEEDING SAID CONSUMABLE ELECTRODE IN THE DIRECTION TOWARD SAID CRUCIBLE, AT LEAST ONE ELEMENT HAVING AN ELECTRICAL RESISTANCE VARYING IN PROPORTION TO ITS DEFORMATION, MEANS FOR CONNECTING SAID ELEMENT TO SAID FEEDING MEANS SO AS TO BE ACTED UPON BY THE WEIGHT OF SAID CONSUMABLE ELECTRODE AND TO BE DEFORMED THEREBY, AND ELECTRIC CIRCUIT MEANS CONNECTED TO SAID ELEMENT AND INCLUDING A SOURCE OF CURRENT AND ELECTRIC MEANS FOR DETERMINING THE ELECTRICAL RESISTANCE OF SAID ELEMENT AND THE CHANGES IN SAID RESISTANCE DUE TO THE VARYING DEFORMATION OF SAID ELEMENT CAUSED BY THE CHANGING WEIGHT OF SAID CONSUMABLE ELECTRODE WHILE BEING MELTED.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |