Patent US3745828A successfully refreshed from Google Patents.
US3745828A
Expired / Lapsed
US
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Temperature sensing device for continuouscasting molds
Assignee: United States Steel Corp
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Filing: 1972-02-09
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Granted: 1973-07-17
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Expires: 1992-02-09
Abstract
Abstract An improved temperature-sensing device for use in a mechanism which locates the level of liquid in a continuous casting mold. The device includes probes which are spring-urged into contact with the inner wall of the mold, as shown in an earlier application. The features of improvement are (1) that the springs are encased out of contact with the cooling water, whereby sediment in the water cannot jam them, and (2) the points on the probes are covered with a sealant, whereby impurities in the water do not precipitate on them.
Inventors
- 👤 W Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:56
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247; G01F23/248; B; B22; B22D; B22D11/00; B22D11/16; B22D11/22; B22D2/00; B22D2/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
230 words
In a combination which includes a continuous-casting mold adapted to contain liquid metal and a mechanism for indicating the level of the liquid metal therein; said mold including spaced-apart inner and outer walls, said inner wall containing the liquid metal and being itself of a metal which has a high thermal conductivity, the space between said walls forming a passage through which cooling water circulates to cool said inner wall; said mechanism including a row of vertically spaced temperaturesensing devices on said mold and a measuring circuit connected to said devices for indicating the level at which there is an abrupt change in the temperature of said inner wall; each of said devices comprising a respective probe having a point at one end and being of a metal dissimilar to the metal of said inner wall, a respective tubular housing mounted in said outer wall, said probe being electrically insulated from said outer wall and extending through said housing and across said passage where it is exposed to water circulating therethrough, and a spring urging said probe to a position in which said point contacts said inner wall, the improvement in which: said housing has a counterbore through which said probe extends, said spring is located within said counterbore, and sealing means between the surfaces of said probe and said counterbore prevents water in said passage from reaching said spring.
Claim 2
Dependent Claim
230 words
In a combination which includes a continuous-casting mold adapted to contain liquid metal and a mechanism for indicating the level of the liquid metal therein; said mold including spaced-apart inner and outer walls, said inner wall containing the liquid metal and being itself of a metal which has a high thermal conductivity, the space between said walls forming a passage through which cooling water circulates to cool said inner wall; said mechanism including a row of vertically spaced temperaturesensing devices on said mold and a measuring circuit connected to said devices for indicating the level at which there is an abrupt change in the temperature of said inner wall; each of said devices comprising a respective probe having a point at one end and being of a metal dissimilar to the metal of said inner wall, a respective tubular housing mounted in said outer wall, said probe being electrically insulated from said outer wall and extending through said housing and across said passage where it is exposed to water circulating therethrough, and a spring urging said probe to a position in which said point contacts said inner wall, the improvement in which: said housing has a counterbore through which said probe extends, said spring is located within said counterbore, and sealing means between the surfaces of said probe and said counterbore prevents water in said passage from reaching said spring.
Claim 3
Dependent Claim
42 words
An improvement as defined in claim 1 in which said probe carries bushings located within said counterbore, said spring encircles said probe between said bushings, and said sealing means are in the form of O-rings mounted at opposite ends of said counterbore.
Claim 4
Dependent Claim
30 words
An improvement as defined in claim 1 in which said inner wall has a well rEceiving said point, and including a body of sealant within said well covering said point.
Claim 5
Dependent Claim
212 words
In a combination which includes a continuous-casting mold adapted to contain liquid metal and a mechanism for indicating the level of the liquid metal therein; said mold including spaced-apart inner and outer walls, said inner wall containing the liquid metal and being itself of a metal which has a high thermal conductivity, the space between said walls forming a passage through which cooling water circulates to cool said inner wall; said mechanism including a row of vertically spaced temperature-sensing devices on said mold and a measuring circuit connected to said devices for indicating the level at which there is an abrupt change in the temperature of said inner wall; each of said devices comprising a respective probe having a point at one end and being of a metal dissimilar to the metal of said inner wall, a respective tubular housing mounted in said outer wall, said probe being electrically insulated from said outer wall and extending through said housing and across said passage where it is exposed to water circulating therethrough, and a spring urging said probe to a position in which said point contacts said inner wall; the improvement in which: said inner wall has a well receiving said point, and a body of sealant within said well covers said point.
Claim 6
Dependent Claim
212 words
In a combination which includes a continuous-casting mold adapted to contain liquid metal and a mechanism for indicating the level of the liquid metal therein; said mold including spaced-apart inner and outer walls, said inner wall containing the liquid metal and being itself of a metal which has a high thermal conductivity, the space between said walls forming a passage through which cooling water circulates to cool said inner wall; said mechanism including a row of vertically spaced temperature-sensing devices on said mold and a measuring circuit connected to said devices for indicating the level at which there is an abrupt change in the temperature of said inner wall; each of said devices comprising a respective probe having a point at one end and being of a metal dissimilar to the metal of said inner wall, a respective tubular housing mounted in said outer wall, said probe being electrically insulated from said outer wall and extending through said housing and across said passage where it is exposed to water circulating therethrough, and a spring urging said probe to a position in which said point contacts said inner wall; the improvement in which: said inner wall has a well receiving said point, and a body of sealant within said well covers said point.
Claim 7
Dependent Claim
22 words
An improvement as defined in claim 4 in which said spring is encased out of contact with water circulating in said passage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |