US4354382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining the level of melt in a ladle or the like
Assignee: Geotronics Metaltech AB
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Filing: 1980-06-10
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Granted: 1982-10-19
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Expires: 2000-06-10
Abstract
Abstract The present invention relates to a device for determining the level of the melt in a ladle or the like, which device comprises a lance (20) with a tubular end adapted to be submerged in the melt. At least one non-contact sensor (1) is mounted in the tubular end of the lance (20) straight opposite to an aperture (24) through the wall of the tubular end. The aperture (24) or the apertures are covered by a sleeve (27) of a heat resistant, electricly non-conducting material. The sensor or the sensors are electrically connected to operational equipment for signals coming from the sensor or the sensors.
Inventors
- 👤 Hans Hagglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:24
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/04; B; B22; B22D; B22D21/00; G01F23/22; G01F23/26; G01F23/261
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
Device for determing the level of a melt in a ladle or the like comprising, a lance, one end of which comprises a tubular wall portion which is adapted to be submerged into said melt, the surface of said wall portion having at least one aperture therethrough; at least one non-contact sensor mounted internal of said lance upon the surface of said wall portion, each sensor being positioned opposite an aperture; means attached to each sensor for electrical connection to equipment which receives signals coming from each sensor; and, a sleeve of heat resistant, electrically non-conducting material which encloses said tubular wall portion and covers each aperture.
Claim 2
Dependent Claim
107 words
Device for determing the level of a melt in a ladle or the like comprising, a lance, one end of which comprises a tubular wall portion which is adapted to be submerged into said melt, the surface of said wall portion having at least one aperture therethrough; at least one non-contact sensor mounted internal of said lance upon the surface of said wall portion, each sensor being positioned opposite an aperture; means attached to each sensor for electrical connection to equipment which receives signals coming from each sensor; and, a sleeve of heat resistant, electrically non-conducting material which encloses said tubular wall portion and covers each aperture.
Claim 3
Dependent Claim
17 words
Device according to claim 1 characterized in that the sensor or the sensors are non-contact inductive sensors.
Claim 4
Dependent Claim
17 words
Device according to claim 1 or 2, characterized in that the sleeve (27) consists of paper material.
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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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |