US3568050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for monitoring ferromagnetic material temperature above the curie point
Assignee: United States Steel Corp
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Filing: 1969-05-29
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Granted: 1971-03-02
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Expires: 1989-05-29
Abstract
Abstract A method and apparatus for automatically measuring and/or recording the temperature of a paramagnetically susceptible material, such as steel during hot rolling, whereby the material is passed through a magnetic field and the magnetic field strength is changed in proportion to the material''s paramagnetic susceptibility. A semiconducting probe measures the change in field strength, and through proper instrumentation the change in field strength is recorded as degrees of temperature.
Inventors
- 👤 Douglas L Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:29
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A method of determining the temperature of a paramagnetic material having a known temperature dependent paramagnetic susceptibility comprising the steps of: a. creating a magnetic field of known constant strength across a defined space; b. introducing the paramagnetic material within said defined space to change the strength of said magnetic field in proportion to the temperature of said paramagnetic material; c. measuring the change in the magnetic field strength caused by said paramagnetic material; and d. deriving the temperature of said material from a predetermined relationship between material temperature and its affect on the magnetic field strength.
Claim 2
Independent Claim
97 words
A method of determining the temperature of a paramagnetic material having a known temperature dependent paramagnetic susceptibility comprising the steps of: a. creating a magnetic field of known constant strength across a defined space; b. introducing the paramagnetic material within said defined space to change the strength of said magnetic field in proportion to the temperature of said paramagnetic material; c. measuring the change in the magnetic field strength caused by said paramagnetic material; and d. deriving the temperature of said material from a predetermined relationship between material temperature and its affect on the magnetic field strength.
Claim 3
Dependent Claim
122 words
A method according to claim 1 wherein said change in magnetic field strength is determined by providing a Hall device within said magnetic field, passing a constant electric current through said Hall device perpendicular to the flux of said magnetic field to create an electrical potential within said Hall device perpendicular to both said magnetic flux and said current, measuring the magnitude of said electrical potential without said paramagnetic material within said magnetic field to derive a control value therefor, again measuring the magnitude of said electrical potential within said Hall device after said paramagnetic material has been introduced within the magnetic field, and measuring the change in magnetic field strength from the change in said electrical potential within the Hall device.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |