US4964736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion measuring probe for use in molten metals
Assignee: Grimes Aerospace Co
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Filing: 1989-03-27
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Granted: 1990-10-23
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Expires: 2009-03-27
Abstract
Abstract An immersion probe as a preassembled unit includes a measuring head having a measuring element protected for minimizing trapping of gases by a sheath. The sheath is tapered toward a free end. The probe is adapted to be immersed in molten metal for measuring temperature and/or oxygen content.
Inventors
- 👤 Omer Cure
- 👤 Theo P. C. Bollen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/025; G01N; G01N33/00; G01N33/20; G01N33/205
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
345 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug, an electro-chemical cell extending through said plug having one end adjacent to said projecting end of the thermocouple element and an electronically conductive portion extending into said tube beyond said plug; a gas impermeable enclosure receiving the electrically conductive portions of said thermocouple and said cell, said enclosure being closely adjacent to said measuring head within said tube; electrical conductors extending from said enclosure to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said thermocouple, said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to the exterior of said tube, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent the measuring head when immersed into the metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 2
Dependent Claim
345 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug, an electro-chemical cell extending through said plug having one end adjacent to said projecting end of the thermocouple element and an electronically conductive portion extending into said tube beyond said plug; a gas impermeable enclosure receiving the electrically conductive portions of said thermocouple and said cell, said enclosure being closely adjacent to said measuring head within said tube; electrical conductors extending from said enclosure to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said thermocouple, said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to the exterior of said tube, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent the measuring head when immersed into the metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 3
Dependent Claim
24 words
An immersion measuring probe as claimed in claim 1 wherin said thermocouple element further comprises a quartz tube having an aluminum oxide coating thereon.
Claim 4
Dependent Claim
306 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug, a gas impermeable enclosure receiving the electrically conductive portions of said thermocouple, said enclosure being closely adjacent to said measuring head within said tube; electrical conductors extending from said enclosure to said connector end of said tube; an electrical connector closing said connector end of said tube and providing an electrical connection for said thermocouple; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed in a metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 5
Dependent Claim
306 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug, a gas impermeable enclosure receiving the electrically conductive portions of said thermocouple, said enclosure being closely adjacent to said measuring head within said tube; electrical conductors extending from said enclosure to said connector end of said tube; an electrical connector closing said connector end of said tube and providing an electrical connection for said thermocouple; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed in a metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 6
Dependent Claim
304 words
An immersion probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, an electro-chemical cell extending through said plug having one end projecting form said immersion end of said tube and its opposite extending into said tube beyond said plug; a gas impermeable enclosure receiving the electrically conductive portion of said cell, said enclosure being closely adjacent to said measuring head within said tube; electrical conductors extending from said enclosure to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed into a metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 7
Dependent Claim
304 words
An immersion probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, an electro-chemical cell extending through said plug having one end projecting form said immersion end of said tube and its opposite extending into said tube beyond said plug; a gas impermeable enclosure receiving the electrically conductive portion of said cell, said enclosure being closely adjacent to said measuring head within said tube; electrical conductors extending from said enclosure to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed into a metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 8
Dependent Claim
343 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug, an electrochemical cell extending through said plug having one end projecting from the immersion end of said tube adjacent to said projecting end of the thermocouple element and an electrically conducting portion extending into said tube beyond said plug; means within said tube for receiving the electrically conductive portions of said thermocouple and said cell; electrical conductors extending from said receiving means to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said thermocouple, said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to the exterior of said tube, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent the measuring head when immersed into the metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 9
Dependent Claim
343 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug, an electrochemical cell extending through said plug having one end projecting from the immersion end of said tube adjacent to said projecting end of the thermocouple element and an electrically conducting portion extending into said tube beyond said plug; means within said tube for receiving the electrically conductive portions of said thermocouple and said cell; electrical conductors extending from said receiving means to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said thermocouple, said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; a sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to the exterior of said tube, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent the measuring head when immersed into the metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 10
Dependent Claim
296 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and having an electrically conductive portion extending into said tube beyond said plug, means within said tube for receiving the electrically conductive portion of said thermocouple; electrical conductors extending from said receiving means to said connector end of said tube; an electrical connector closing said connector end of said tube and providing an electrical connection for said thermocouple; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed in a metal bath, the opposite end of said sheathing form said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 11
Dependent Claim
296 words
An immersion measuring probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, a thermocouple element supported by said plug and having one end projecting from said immersion end of said tube and having an electrically conductive portion extending into said tube beyond said plug, means within said tube for receiving the electrically conductive portion of said thermocouple; electrical conductors extending from said receiving means to said connector end of said tube; an electrical connector closing said connector end of said tube and providing an electrical connection for said thermocouple; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed in a metal bath, the opposite end of said sheathing form said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 12
Dependent Claim
295 words
An immersion probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, an electrochemical cell extending through said plug having one end projecting form said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug; means within said tube for receiving the electrically conductive portion of said cell; electrical conductors extending from said receiving means to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed into a metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
Claim 13
Dependent Claim
295 words
An immersion probe for measurements in a molten metal bath comprising: an elongated hollow electrically conductive tube, said tube having an immersion end and a connector end; a measuring head closing the internal portion of said immersion end of said tube, said measuring head having a non-conductive support plug, an electrochemical cell extending through said plug having one end projecting form said immersion end of said tube and an electrically conductive portion extending into said tube beyond said plug; means within said tube for receiving the electrically conductive portion of said cell; electrical conductors extending from said receiving means to said connector end of said tube; an electrical connector closing said connector end of said tube and providing electrical connections for said cell and said tube; said tube between said plug and said connector being filled with a heat insulating particulate material which is loosely packed such that it is gas permeable; sheathing surrounding a major portion of the length of said tube, said sheathing being made of a fireproof, refractory heat resistant material attached to said tube exterior, the outer surface of said sheathing being tapered towards the immersion end of said tube such that a minimum thickness of said sheathing is directly adjacent to and exposing said immersion end of said tube for minimizing trapped gases adjacent to the measuring head when immersed into a metal bath, the opposite end of said sheathing from said tapered end forming a shoulder adjacent to said connector end of said tube; and an elongated hollow support for receiving said shoulder of said sheathing in an abutting relationship such that the end of said tube is inserted into said support and said outer diameter of said sheathing and said support are substantially the same at said shoulder.
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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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |