US4101725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearth electrode for melting furnaces
Assignee: Individual
•
Filing: 1976-08-16
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Granted: 1978-07-18
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Expires: 1996-08-16
Abstract
Abstract A hearth electrode for melting furnaces having a cylinder with the outer surface of the bottom thereof being adapted for contacting the melt stock or melt, and the inner space thereof being used for the circulation of a coolant. The electrode is provided with means for detecting local burnings-through or consumption by burning in the bottom thereof, in the form of a system of conduits arranged in cross-sectional planes of the bottom between the outer surface and inner space thereof. The conduits are filled with gas under a pressure different than the static pressure within the melting furnace, and connected with pressure sensors.
Inventors
- 👤 Nikolai Semenovich Shelepov
- 👤 Valery Alexeevich Kildjushev
- 👤 Evgeny Mitrofanovich Kitaev
- 👤 Vissarion Makarovich Dubodin
- 👤 Vladimir Alexeevich Kochetkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:47
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A hearth electrode for melting furnaces comprising a cylinder, one end of said cylinder having an outer surface thereof and being adapted for contacting a melt stock or melt within the melting furnace, an inner space of said cylinder being adapted for providing a coolant passageway; passage means for detecting local burnings-through or consumption by burning in said bottom being filled with gas under a pressure differential with respect to the static pressure within the melting furnace, said passage means being provided all along the electrode cross section and lying in a longitudinal plane of said bottom between said outer surface and said inner space of the electrode; and a sensor for pressure control in communication with said passage means for detecting a pressure change in said passage means.
Claim 2
Dependent Claim
129 words
A hearth electrode for melting furnaces comprising a cylinder, one end of said cylinder having an outer surface thereof and being adapted for contacting a melt stock or melt within the melting furnace, an inner space of said cylinder being adapted for providing a coolant passageway; passage means for detecting local burnings-through or consumption by burning in said bottom being filled with gas under a pressure differential with respect to the static pressure within the melting furnace, said passage means being provided all along the electrode cross section and lying in a longitudinal plane of said bottom between said outer surface and said inner space of the electrode; and a sensor for pressure control in communication with said passage means for detecting a pressure change in said passage means.
Claim 3
Dependent Claim
21 words
The hearth electrode according to claim 1, wherein the pressure in said passage means exceeds said static pressure within said furnace.
Claim 4
Dependent Claim
47 words
The hearth electrode according to claim 1, wherein further passage means, for detecting local burnings-through or consumption by burning in said bottom, are provided in said electrode all along the cross section thereof, and are disposed below said passage means in another longitudinal plane of said bottom.
Claim 5
Dependent Claim
34 words
The hearth electrode according to claim 2, including a pressure sensor in communication with said further passage means for signaling an alarm upon local burnings-through or consumption by burning reaching said further passage means.
Claim 6
Dependent Claim
25 words
The hearth electrode according to claim 3, wherein said passage means and said further passage means are distributed uniformly all along said electrode cross section.
Claim 7
Dependent Claim
24 words
The hearth electrode according to claim 5, wherein said further passage means are offset in said cross-sectional plane with respect to said passage means.
Claim 8
Dependent Claim
14 words
The hearth electrode according to claim 1, wherein said cylinder is made of copper.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |