US4355907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for picking up a molten test sample of metal or metal alloys and measuring the cooling curve of said sample
Assignee: VEREIN ZUR FORDERUNG DER GIESSEREI INDUSTRIE DE
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Filing: 1980-07-10
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Granted: 1982-10-26
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Expires: 2000-07-10
Abstract
Abstract In apparatus for picking up a test sample of molten metal or metal alloys and measuring the cooling curve of said sample, comprising a sample receptor and an optical conductor leading from the receptor to a transducer, the receptor is a small, open ended refractory tube having a cavity for receiving the molten sample arranged at the free extremity of a lance with the optical conductor contained within the lance and terminating at the cavity in said receptor and a barrier is disposed between the cavity and the optical conductor, the barrier consisting of a heat resistant, highly thermally conductive material of such quality as to cause the material of the melt sample which is picked up to adhere thereto.
Inventors
- 👤 Kurt Orths
- 👤 Milan Lampic
- 👤 Peter Berger
- 👤 Jorg Muller
- 👤 Herbert Loblich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:03
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/12; G01N1/125; G01K; G01K13/00; G01K13/12; G01K13/125
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
In apparatus for picking up a test sample of molten metal or metal alloys and measuring the cooling curve of said sample, comprising a sample receptor and a optical conductor leading from the receptor to a transducer, the improvement comprising: (a) a lance; (b) the receptor being a small, open ended refractory tube having a cavity for receiving the molten sample arranged at the free extremity of said lance; (c) the optical conductor contained within said lance and terminating at said cavity in said receptor; (d) a barrier disposed between said cavity and said optical conductor, said barrier consisting of a heat resistant, highly thermally conductive material of such quality as to cause the material of the melt sample which is picked up to adhere thereto.
Claim 2
Dependent Claim
126 words
In apparatus for picking up a test sample of molten metal or metal alloys and measuring the cooling curve of said sample, comprising a sample receptor and a optical conductor leading from the receptor to a transducer, the improvement comprising: (a) a lance; (b) the receptor being a small, open ended refractory tube having a cavity for receiving the molten sample arranged at the free extremity of said lance; (c) the optical conductor contained within said lance and terminating at said cavity in said receptor; (d) a barrier disposed between said cavity and said optical conductor, said barrier consisting of a heat resistant, highly thermally conductive material of such quality as to cause the material of the melt sample which is picked up to adhere thereto.
Claim 3
Dependent Claim
21 words
The improvement according to claim 1, wherein said barrier consists of a substance which influences the texture of the test sample.
Claim 4
Dependent Claim
30 words
The improvement according to claim 1 wherein said barrier is selected from the group consisting of graphite, preferably pyrographite, high-melting oxides and silicates such as zirconium oxide, or zirconium silicate.
Claim 5
Dependent Claim
15 words
The improvement according to claim 1 wherein said barrier is less than 0.5 mm thick.
Claim 6
Dependent Claim
15 words
The improvement according to claim 4 wherein said barrier is less than 0.1 mm thick.
Claim 7
Dependent Claim
29 words
The improvement according to claim 1 wherein said refractory tube is made of a material selected from the group consisting of metal, ceramics, refactory glass and a sintered material.
Claim 8
Dependent Claim
16 words
The improvement according to claim 1 and further including a vent hole in said refractory tube.
Claim 9
Dependent Claim
16 words
The improvement according to claim 1 wherein said barrier comprises a platelet clamped in said tube.
Claim 10
Dependent Claim
18 words
The improvement according to claim 7 wherein said platelet rests on a constricted wall region of said tube.
Claim 11
Dependent Claim
25 words
The improvement according to claim 1 wherein said cavity has a capacity for holding from 1 to 2 g of molten metal or metal alloy.
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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |