US3794100A
Expired / Lapsed
US
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Method of making a billet suitable for manufacturing into a superconductor
Assignee: Cryomagnetics Corp
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Filing: 1970-06-18
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Granted: 1974-02-26
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Expires: 1990-06-18
Abstract
Abstract A plurality of rods are assembled in a predetermined configuration to form a core which is surrounded by a molten matrix metal within a heated crucible. The temperature of the thusly charged crucible''s upper portion is maintained above the matrix metal''s melting point. In this respect, as the heat is applied to the top of the melt, the crucible is maintained in a hot environment while the bottom of the crucible is centrally chilled. In this manner the charge is solidified from the bottom toward the top so that the solidification progresses upwardly and outwardly in a conical pattern. After the controlled solidification is completed the casting is separated from the crucible to form a cored extrusion billet. In one embodiment the rods are separated from the casting and the resulting open holes are filled with superconductive material to form a composite superconductor extrusion billet. In another embodiment the rods themselves are made of a superconductive material so as to eliminate the step of separating the rods from the casting.
Inventors
- 👤 J Raymond
- 👤 C Whetstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/045; H; H01; H01B; H01B12/00; H01B12/02; H01B12/10; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/912; Y10S505/913; Y10S505/915; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
A method of making a cast extrusion billet suitable for manufacturing into a composite superconductor comprising the steps of: creating a melt of matrix metal in a form; adding to said melt an alloy material in a predetermined amount corresponding to a predetermined resistivity ratio of the resulting composite superconductor; locating an array of preheated rods in said melt such that the melt envelopes the array of rods; sensing the temperature of said form at predetermined points along the surface thereof running from the bottom to the top; controlling the solidification of said melt from the bottom of said billet toward the top thereof in accordance with said sensed temperature in a manner such that said solidification progresses upwardly in the pattern of a cone so as to eliminate undesired voids and casing defects, and obtain a nonporous uniform billet; and, separating the solidified matrix and said array from said form to provide a cast extrusion billet suitable for manufacturing into said composite superconductor.
Claim 2
Independent Claim
164 words
A method of making a cast extrusion billet suitable for manufacturing into a composite superconductor comprising the steps of: creating a melt of matrix metal in a form; adding to said melt an alloy material in a predetermined amount corresponding to a predetermined resistivity ratio of the resulting composite superconductor; locating an array of preheated rods in said melt such that the melt envelopes the array of rods; sensing the temperature of said form at predetermined points along the surface thereof running from the bottom to the top; controlling the solidification of said melt from the bottom of said billet toward the top thereof in accordance with said sensed temperature in a manner such that said solidification progresses upwardly in the pattern of a cone so as to eliminate undesired voids and casing defects, and obtain a nonporous uniform billet; and, separating the solidified matrix and said array from said form to provide a cast extrusion billet suitable for manufacturing into said composite superconductor.
Claim 3
Dependent Claim
65 words
The method of claim 1 wherein said controlled solidification includes the step of: cooling the melt at the bottom while: maintaining said form in a hot environment above the melting point of said matrix metal; and, heating said form at the top of said melt to maintain the temperature thereof above the melting point of said matrix metal until the top of said melt solidifies.
Claim 4
Dependent Claim
70 words
The method of claim 1 wherein said rods are comprised of a superconductor material and wherein said controlled solidification includes the step of: cooling the melt at the bottoM while: maintaining said form in a hot environment above the melting point of said matrix metal; and, heating said form at the top of said melt to maintain the temperature thereof above the melting point of said matrix metal until the
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein said rods are quartz.
Claim 6
Dependent Claim
61 words
The method of claim 4 including the step of: cooling the melt at the bottom while: maintaining said form in a hot environment avobe the melting point of said matrix metal; and, heating said form at the top of said melt to maintain the temperature thereof above the melting point of said matrix metal until the top of said melt solidifies.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said rods are of refractory-compound coated metals.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein said rods are comprised of superconductive metal surface-treated with metals selected from the group consisting of niobium, molybdenum, and tungsten.
Claim 9
Independent Claim
230 words
A method of making an extrusion billet suitable for manufacturing into a composit superconductor comprising the steps of: constructing an array of parallel rods in a frame so that said rods are arranged in a pattern about a central longitudinal axis; preheating said array of parallel rods and said frame; locating a matrix metal in a crucible and heating said matrix metal in said crucible to a molten state; adding to said molten matrix metal an alloy material in a predetermined amount corresponding to a predetermined resistivity ratio of the resulting composit superconductor; inserting said preheated array of parallel rods and said frame in said molten metal matrix in said crucible; sensing the temperature of said crucible at predetermined points from the bottom to the top thereof; solidifying said molten matrix metal about said array of parallel rods from the bottom of said crucible toward the top thereof in accordance with said sensed temperature in a manner such that said solidification progresses upwardly in the pattern of a cone by cooling the crucible at the bottom while: maintaining said crucible in a hot environment above the melting point of said molten matrix metal; and, heating said crucible at the top to maintain the temperature thereof above the melting point of said molten matrix metal until the top of said melt solidifies; and, separating the thusly formed billet from said crucible.
Claim 10
Independent Claim
230 words
A method of making an extrusion billet suitable for manufacturing into a composit superconductor comprising the steps of: constructing an array of parallel rods in a frame so that said rods are arranged in a pattern about a central longitudinal axis; preheating said array of parallel rods and said frame; locating a matrix metal in a crucible and heating said matrix metal in said crucible to a molten state; adding to said molten matrix metal an alloy material in a predetermined amount corresponding to a predetermined resistivity ratio of the resulting composit superconductor; inserting said preheated array of parallel rods and said frame in said molten metal matrix in said crucible; sensing the temperature of said crucible at predetermined points from the bottom to the top thereof; solidifying said molten matrix metal about said array of parallel rods from the bottom of said crucible toward the top thereof in accordance with said sensed temperature in a manner such that said solidification progresses upwardly in the pattern of a cone by cooling the crucible at the bottom while: maintaining said crucible in a hot environment above the melting point of said molten matrix metal; and, heating said crucible at the top to maintain the temperature thereof above the melting point of said molten matrix metal until the top of said melt solidifies; and, separating the thusly formed billet from said crucible.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |