GB605113A - Improvements in or relating to methods of manufacturing permanent magnets of the kind employed in electric metering apparatus - Google Patents
Improvements in or relating to methods of manufacturing permanent magnets of the kind employed in electric metering apparatusInfo
- Publication number
- GB605113A GB605113A GB3501845A GB3501845A GB605113A GB 605113 A GB605113 A GB 605113A GB 3501845 A GB3501845 A GB 3501845A GB 3501845 A GB3501845 A GB 3501845A GB 605113 A GB605113 A GB 605113A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casting
- per cent
- temperature
- magnetic field
- conductor
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
In a method of manufacturing a permanent magnet of the kind used in electric metering devices, a loop casting of an alloy of coercivity greater than 200 oersteds is heated by a high frequency induction heating coil to a temperature above its Curie temperature allowed to cool in the presence of a circular magnetic field to below its Curie point and then has a radial portion removed to provide and air gap. The circular magnetic field may be obtained by disposing the casting on a conductor rod of circular section which is connected to a source of direct or alternating current, and the induction coil which may be one and a half times the length of the casting is arranged round both casting and conductor. The magnetic field produced by the conductor is maintained from the time of switching on the heating core current, when the loop casting has a temperature of 1200 DEG C., until the casting has a temperature of 500 DEG C. The magnetic alloy may have the following constituents C-.06 per cent, Ni-11.5 per cent, Al-8 per cent, Cu-4 per cent, Co-21 per cent, the remainder being iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3501845A GB605113A (en) | 1945-12-28 | 1945-12-28 | Improvements in or relating to methods of manufacturing permanent magnets of the kind employed in electric metering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3501845A GB605113A (en) | 1945-12-28 | 1945-12-28 | Improvements in or relating to methods of manufacturing permanent magnets of the kind employed in electric metering apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB605113A true GB605113A (en) | 1948-07-15 |
Family
ID=10372813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3501845A Expired GB605113A (en) | 1945-12-28 | 1945-12-28 | Improvements in or relating to methods of manufacturing permanent magnets of the kind employed in electric metering apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB605113A (en) |
-
1945
- 1945-12-28 GB GB3501845A patent/GB605113A/en not_active Expired
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