GB614788A - Improvements in or relating to the production of permanent magnets - Google Patents
Improvements in or relating to the production of permanent magnetsInfo
- Publication number
- GB614788A GB614788A GB2261446A GB2261446A GB614788A GB 614788 A GB614788 A GB 614788A GB 2261446 A GB2261446 A GB 2261446A GB 2261446 A GB2261446 A GB 2261446A GB 614788 A GB614788 A GB 614788A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- magnets
- per cent
- curie point
- enclosed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004020 conductor Substances 0.000 abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000000137 annealing Methods 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000615 nonconductor Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- General Induction Heating (AREA)
Abstract
614,788. Alloys; annealing. SWIFT, LEVICK, & SONS, Ltd., TETLEY, F. W., and HORSBURGH, G. D. L. July 30, 1946, No 22614. [Classes 72 and 82(i)] In a method of producing anisotropic permanent magnets, a magnet body is heated to a temperature below its melting point but above the Curie point and cooled past the Curie point while the whole of the magnet body forms at least a part of a single flux path around and in proximity to an electrical conductor supplied with an alternating current of high intensity. As shown, small ring magnets 22 made of an alloy consisting of 8 per cent Al, 11.5 per cent Ni, 24 per cent Co. 5.5 per cent Cu, and the balance iron and unavoidable impurities; separated from each other by fire clay luting 24 and enclosed in an austenitic steel sheath 23 are heated to 1250‹C. and then slipped on to a watercooled conductor 10 which is connected to the secondary winding 15 of a transformer by clamps 11 and 12 and allowed to cool past the Curie point while a current of which the root mean square value is between 100 and 600 amps per cm of the mean magnetic length of the magnet is passed through the conductor. The magnets may be enclosed to control the cooling rate and the conductor may have a coating of a non-conductor of heat. Horseshoe magnets, Fig. 6 (not shown), and bar magnets, Fig. 7 (not shown), may also be treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2261446A GB614788A (en) | 1946-07-30 | 1946-07-30 | Improvements in or relating to the production of permanent magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2261446A GB614788A (en) | 1946-07-30 | 1946-07-30 | Improvements in or relating to the production of permanent magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB614788A true GB614788A (en) | 1948-12-22 |
Family
ID=10182289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2261446A Expired GB614788A (en) | 1946-07-30 | 1946-07-30 | Improvements in or relating to the production of permanent magnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB614788A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1101637B (en) * | 1957-03-30 | 1961-03-09 | Deutsche Edelstahlwerke Ag | Pressing device for the production of anisotropic permanent magnet bodies from powdery starting materials |
| DE1639547B1 (en) * | 1961-06-28 | 1969-09-18 | Philips Nv | Process for the production of a magnetically anisotropic permanent magnet body |
| US3498851A (en) * | 1964-12-17 | 1970-03-03 | Nippon Musical Instruments Mfg | Method for producing an anisotropic permanent magnet material |
| US3520677A (en) * | 1960-10-05 | 1970-07-14 | Sadaichi Komaki | Method of manufacturing metal blanks having an anisotropic crystalline structure |
| DE3406807A1 (en) * | 1983-02-28 | 1984-10-04 | Nippon Gakki Seizo K.K., Hamamatsu, Shizuoka | METHOD FOR PRODUCING A MAGNET |
-
1946
- 1946-07-30 GB GB2261446A patent/GB614788A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1101637B (en) * | 1957-03-30 | 1961-03-09 | Deutsche Edelstahlwerke Ag | Pressing device for the production of anisotropic permanent magnet bodies from powdery starting materials |
| US3520677A (en) * | 1960-10-05 | 1970-07-14 | Sadaichi Komaki | Method of manufacturing metal blanks having an anisotropic crystalline structure |
| DE1639547B1 (en) * | 1961-06-28 | 1969-09-18 | Philips Nv | Process for the production of a magnetically anisotropic permanent magnet body |
| US3498851A (en) * | 1964-12-17 | 1970-03-03 | Nippon Musical Instruments Mfg | Method for producing an anisotropic permanent magnet material |
| DE3406807A1 (en) * | 1983-02-28 | 1984-10-04 | Nippon Gakki Seizo K.K., Hamamatsu, Shizuoka | METHOD FOR PRODUCING A MAGNET |
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