Patent US3719574A successfully refreshed from Google Patents.
US3719574A
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US
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Apparatus for measuring in a continuous manner the oxygen in a molten metal
Assignee: Societe Generale Metallurgique de Hoboken SA
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Filing: 1970-07-06
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Granted: 1973-03-06
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Expires: 1990-07-06
Abstract
Abstract Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which includes solid oxygen electrolyte rod or strip; reference electrode having known oxygen potential; means for measuring the electrochemical potential present between the reference electrode and the metal which is to be tested; a protective tube surrounding the electrolyte; and wherein the electrolyte is held in the end of the tube by means of an oxide cement.
Inventors
- 👤 F Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:54
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/411; G01N27/4118
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
238 words
Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which comprises: a. a solid oxygen electrolyte selected from the group of solid oxygen electrolyte rod and solid oxygen electrolyte strip and wherein the length of said electrolyte is greater than the width of said electrolyte; b. one face of said electrolyte being adapted to be contacted with a phase or phases providing a controlled oxygen pressure used as a reference; c. the other face of said electrolyte being adapted to be contacted with the molten metal which is to be tested; d. means for measuring the electrochemical potential present between the reference and the metal which is to be tested; e. the end of the electrolyte which contains the face which is adapted to be contacted with the phase or phases providing a controlled oxygen pressure is platinized or sheathed in platinum foil and then platinum wire is attached thereto by winding around said end of the electrolyte; and wherein said platinum wire is then led away to the top of the apparatus in such a manner that it does not make contact with the tube; f. a tube surrounding said electrolyte against chemical attacks, the thermal shock, and mechanical stress due to contact with the liquid molten metal; g. said electrolyte is held in the end of said tube by means of a cement which adheres satisfactorily to Said electrolyte and tube.
Claim 2
Dependent Claim
238 words
Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which comprises: a. a solid oxygen electrolyte selected from the group of solid oxygen electrolyte rod and solid oxygen electrolyte strip and wherein the length of said electrolyte is greater than the width of said electrolyte; b. one face of said electrolyte being adapted to be contacted with a phase or phases providing a controlled oxygen pressure used as a reference; c. the other face of said electrolyte being adapted to be contacted with the molten metal which is to be tested; d. means for measuring the electrochemical potential present between the reference and the metal which is to be tested; e. the end of the electrolyte which contains the face which is adapted to be contacted with the phase or phases providing a controlled oxygen pressure is platinized or sheathed in platinum foil and then platinum wire is attached thereto by winding around said end of the electrolyte; and wherein said platinum wire is then led away to the top of the apparatus in such a manner that it does not make contact with the tube; f. a tube surrounding said electrolyte against chemical attacks, the thermal shock, and mechanical stress due to contact with the liquid molten metal; g. said electrolyte is held in the end of said tube by means of a cement which adheres satisfactorily to Said electrolyte and tube.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein said tube is made of a substance selected from the group of metal and cermet.
Claim 4
Dependent Claim
200 words
Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which comprises: a. a solid oxygen electrolyte selected from the group of solid oxygen electrolyte rod and solid oxygen electrolyte strip and wherein the length of said electrolyte is greater than the width of said electrolyte; b. one face of said electrolyte being adapted to be contacted with a phase or phases providing a controlled oxygen pressure used as a reference; c. the other face of said electrolyte being adapted to be contacted with the molten metal which is to be tested; d. means for measuring the electrochemical potential present between the reference and the metal which is to be tested; e. a tube surrounding said electrolyte against chemical attacks, the thermal shock, and mechanical stress due to contact with the liquid molten metal; f. said electrolyte is held in the end of said tube by means of cement; and g. an alumina ring present between said electrolyte and said tube; and wherein said electrolyte is cemented into said alumina ring by means of an oxide cement which resists penetration of liquid copper, gases and which does not interfere with the electrical behavior of the electrolyte.
Claim 5
Dependent Claim
200 words
Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which comprises: a. a solid oxygen electrolyte selected from the group of solid oxygen electrolyte rod and solid oxygen electrolyte strip and wherein the length of said electrolyte is greater than the width of said electrolyte; b. one face of said electrolyte being adapted to be contacted with a phase or phases providing a controlled oxygen pressure used as a reference; c. the other face of said electrolyte being adapted to be contacted with the molten metal which is to be tested; d. means for measuring the electrochemical potential present between the reference and the metal which is to be tested; e. a tube surrounding said electrolyte against chemical attacks, the thermal shock, and mechanical stress due to contact with the liquid molten metal; f. said electrolyte is held in the end of said tube by means of cement; and g. an alumina ring present between said electrolyte and said tube; and wherein said electrolyte is cemented into said alumina ring by means of an oxide cement which resists penetration of liquid copper, gases and which does not interfere with the electrical behavior of the electrolyte.
Claim 6
Dependent Claim
35 words
The apparatus of claim 3 wherein the electrolyte and the ring are cemented into said tube by means of a cement which adheres to both of the materials of the alumina ring and the tube.
Claim 7
Dependent Claim
41 words
The apparatus of claim 4 in which the cement which adheres to both of the materials of the ring and the tube is a substance based on a material selected from the group of alumina, magnesia, and alumina mixed with chromium.
Claim 8
Dependent Claim
19 words
The apparatus of claim 3 wherein said oxide cement is selected from the group of alumina, zirconia, and magnesia.
Claim 9
Dependent Claim
161 words
Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which comprises: a. at least two solid oxygen electrolytes selected from the group of solid oxygen electrolyte rod and slid oxygen electrolyte strip; b. one face of each of said electrolytes being adapted to be contacted with a phase or phases providing a controlled oxygen pressure used as a reference; c. the other face of each of said electrolytes being adapted to be contacted with the molten metal which is to be tested; d. means for measuring the electrochemical potential present between the reference and the metal which is to be tested; e. a tube surrounding said electrolytes to protect said solid electrolytes against chemical attacks, the thermal shock, and mechanical stress due to contact with the liquid molten metal; f. said electrolytes are held in the end of said tube by means of a cement which adheres satisfactorily to both of said electrolytes and said tube.
Claim 10
Dependent Claim
161 words
Apparatus for the continuous measurement by immersion of oxygen contained in a molten metal which comprises: a. at least two solid oxygen electrolytes selected from the group of solid oxygen electrolyte rod and slid oxygen electrolyte strip; b. one face of each of said electrolytes being adapted to be contacted with a phase or phases providing a controlled oxygen pressure used as a reference; c. the other face of each of said electrolytes being adapted to be contacted with the molten metal which is to be tested; d. means for measuring the electrochemical potential present between the reference and the metal which is to be tested; e. a tube surrounding said electrolytes to protect said solid electrolytes against chemical attacks, the thermal shock, and mechanical stress due to contact with the liquid molten metal; f. said electrolytes are held in the end of said tube by means of a cement which adheres satisfactorily to both of said electrolytes and said tube.
Claim 11
Dependent Claim
55 words
The apparatus of claim 7 wherein an alumina ring is present between said electrolytes and said tube; and wherein said at least two electrolytes are cemented into said alumina ring by means of an oxide cement which resists penetration of liquid copper, gases and which does not interfere with the electrical behavior of the electrolyte.
Claim 12
Dependent Claim
35 words
The apparatus of claim 8 wherein the electrolytes and the ring are cemented into said tube by means of a cement which adheres to both of the materials of the alumina ring and the tube.
Claim 13
Dependent Claim
38 words
The apparatus of claim 9 wherein said cement which adheres to both of the materials of the ring and tube is a substance based on material selected from the group of alumina, magnesia, and alumina mixed with chromium.
Claim 14
Dependent Claim
19 words
The apparatus of claim 8 wherein said oxide cement is selected from the group of alumina, zirconia, and magnesia.
Claim 15
Dependent Claim
33 words
The apparatus of claim 7 wherein said phase or phases providing a controlled oxygen pressure consists of a metal and metal oxide, and is located at the upper ends of said solid electrolytes.
Claim 16
Dependent Claim
56 words
The apparatus of claim 12 wherein platinum wires are fixed to the solid electrolytes by means of said phase or phases providing a controlled oxygen pressure and the platinum wires are led away to the top of the apparatus in such a manner that they do not make contact with one another or with the tube.
Claim 17
Dependent Claim
84 words
The apparatus of claim 7 wherein the ends of said at least two electrolytes which contain the faces which are adapted to be contacted with the phase or phases providing a controlled oxygen pressure are platinized oR sheathed in platinum foil, platinum wires are attached thereto by winding around said ends of the electrolytes, and the platinum wires are led away to the top of the apparatus in such a manner that they do not make contact with one another or with the tube.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |