US3774441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the thermal analysis of metallic melts
Assignee: EDELSTAHL KOMBINET HENNIGSDORF
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Filing: 1971-05-06
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Granted: 1973-11-27
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Expires: 1991-05-06
Abstract
Abstract Method and apparatus for the thermal analysis of metallic melts, in particular molten carbon steels, involving the use of permanently immersed, non-expandable thermocouples.
Inventors
- 👤 H Dorst
- 👤 H Zielinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:32
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/02; G01N25/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A method for the thermal analysis of melts, such as of molten carbon steels, with the aid of a non-expendable thermocouple inserted in a removal protective tube and immersed in the liquid melt, comprising the steps of freezing on a layer from the surrounding melt onto the protective tube by introducing a coolant into the tube and thus cooling the thermocouple therein, determining the solidification temperature of the frozen-on layer by the aid of the thermocouple, purging the latter by further introduction of the coolant with resulting further cooling thereof, substantially below its temperature measuring range, interrupting the coolant flow to the tube, and determining the temperature of the melt by means of the thermocouple.
Claim 2
Independent Claim
115 words
A method for the thermal analysis of melts, such as of molten carbon steels, with the aid of a non-expendable thermocouple inserted in a removal protective tube and immersed in the liquid melt, comprising the steps of freezing on a layer from the surrounding melt onto the protective tube by introducing a coolant into the tube and thus cooling the thermocouple therein, determining the solidification temperature of the frozen-on layer by the aid of the thermocouple, purging the latter by further introduction of the coolant with resulting further cooling thereof, substantially below its temperature measuring range, interrupting the coolant flow to the tube, and determining the temperature of the melt by means of the thermocouple.
Claim 3
Dependent Claim
32 words
The method as defined in claim 1 wherein said step of freezing on a layer onto the protective tube includes said purging step by further cooling the thermocuple to its purging temperature.
Claim 4
Dependent Claim
42 words
The method as defined in claim 1, wherein said step of cooling the thermocouple is carried out by the aid of a gaseous or liquid rinsing medium which is non-reactive with respect to the materials of the thermocouple and the protective tube.
Claim 5
Independent Claim
75 words
An apparatus for the thermal analysis of melts, such as molten carbon steels, comprising: a non-expendable thermocouple, including a removable protective tube immersed in the liquid melt; means for introducing a coolant into said tube, circulating the same about said thermocouple and discharging the same from said tube, thereby to cool said thermocouple; and a closed, disconnectible cooling unit surrounding said thermocouple the form of a cooling jacket, and being disposed within said protective tube.
Claim 6
Independent Claim
75 words
An apparatus for the thermal analysis of melts, such as molten carbon steels, comprising: a non-expendable thermocouple, including a removable protective tube immersed in the liquid melt; means for introducing a coolant into said tube, circulating the same about said thermocouple and discharging the same from said tube, thereby to cool said thermocouple; and a closed, disconnectible cooling unit surrounding said thermocouple the form of a cooling jacket, and being disposed within said protective tube.
Claim 7
Dependent Claim
45 words
The apparatus as defined in claim 4, wherein said means for introducing, circulating and discharging the coolant includes means for circulating a gaseous or liquid rinsing medium in said protective tube, which is non-reactive with respect to the materials of said thermocouple and saId 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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |