US1403305A - Magnet core and method of making the same - Google Patents
Magnet core and method of making the same Download PDFInfo
- Publication number
- US1403305A US1403305A US432357A US43235720A US1403305A US 1403305 A US1403305 A US 1403305A US 432357 A US432357 A US 432357A US 43235720 A US43235720 A US 43235720A US 1403305 A US1403305 A US 1403305A
- Authority
- US
- United States
- Prior art keywords
- making
- iron
- particles
- finely divided
- cores
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 239000002245 particle Substances 0.000 description 12
- 238000010000 carbonizing Methods 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 239000011810 insulating material Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001249542 Leonia <angiosperm> Species 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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
- H01F1/12—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 soft-magnetic materials
- H01F1/14—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 soft-magnetic materials metals or alloys
- H01F1/20—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Description
*7 unrrso TA FIQE.
GUSTAF W. ELMEN, OF LEONIA, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A. CORPORATION OF NEW,
Patented J an. 10, 1922.
YORK.
MAGNET GORE AND METHOD OF MAKING THE SAME.
1,403,305. Specification of Letters Patent. Ji'o Drawing. I
To all whom it may concern:
Be it known that I, GUSTAF W. ELMEN, a citizen of the United States, residing at Leonia, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Magnet Cores and Methods of Making the Same, of which the following is a full, clear, concise, and exact description.
This invention relates to magnet cores and particularly to telephone loading-coil cores of the so-called dust type, such as are described in the patent issued in myname, No. 1,297,126, dated March 11, 1919,
and the other patents therein referred to.
' The general object of the present'invem tion is to obtain a new and improved magnet core which is cheap to manufacture and possesses to a high degree, those. characteristics that are desirable in cores for loading coils and other electrical apparatus.
The present invention is broadly characterized by the treatment of finely divided magnetic material with a carbonizing agent for the purpose of hardening it. Hardened finely divided magnetic material so obtained is particularly suitable for the manufacture of cores for loading, coils and other telephone apparatus, by reason of the low hysteretic losses which will exist in such coreswhen subjected to the influences o1 telephonic currents.
The present method is applicable to any of the magnetic metals, iron, nickel and oohalt. It will, however, be described as applied to iron since this is themagnetic mate rial most usually employed for magnet cores.
The iron to be used may be either in the form of finely divided iron such, for exam- 40 ple, as what is commercially known as iron by-hydrogen or, inthe form of iron oxide.
In either case, the material is treated with a carbonizing agent such as carbon or an hydrocarbon, sufiicient heat being applied to facilitate the reducing and carbonizing process. Preferably, iron oxide is used, and with this is mixed enough finely divided carbon not only to reduce the oxide but also to J combine with the reduced metal. This mixture of finely divided iron oxide and carbon .is heated to a temperature below the melting temperature of the metal but high enough to cause the'reduction of the iron by the carbon and the combining of the excess carbon with Application and December 21, 1920. Serial No. 432,357.
the reduced metal. Such a temperature is about 300 to 400 (1. below the melting temperature of iron. This reducing and carbonizing treatment causes the material to take a spongy form from which it ma be reduced to a finely divided state by grin ing.
The hard iron particles so obtained may besorted by sifting, coated with insulating material, and formed into a solid in the usual manner as described in the patents hereinbefore mentioned.
What is claimed is:
1. The method ofmaking magnet cores which consists. in treating finely divided magnetic material with a carbonizing agent, coating the particles with insulating material, and forming a mass of such particles into a solid.
2. The method of making magnet cores which consists in treating iron in finely divided form with a carbonizing agent, coating the particles with insulating material, and forming a mass of such particles into a solid.
3. The method of making magnet cores which consists in heating to a carbonizing temperature a mixture of finely divided magnetic material and carbon, coating the particles with insulating material, and forming a mass of such particles into a solid.
4. The method of making magnet core-s which consists in heating to a carbonizing temperature finely divided iron and finely divided carbon, coating the particles with insulating material, and forming a mass of such articles into a solid.
5. he method of making magnet cores which consists in treating an oxide of a magnetic metal with a reducing and carbonizing agent, grinding up the resulting product, coating the particles thus obtained with insulating material, and forming a mass of such particles into a solid.
6. The method of making magnet-cores which consists in treating an iron oxide with a reducing and carbonizing agent, grinding up the resulting product, coating the particles thus obtained with insulating material, and forming a massof such particles into a solid.
7. The method of making magnet cores which consists in heating to a reducing and carbonizing temperature a mixture of iron oxide and carbon, grinding up the resulting vided iron hardened by heating to a corbonizing temperature with finely divided carbon, and insulating material separating the partirles of magnetic material.
In witness whereof, I hereunto subscribe my name this 20th day of December A. D, 1920.
GUSTAF W. ELMEN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US432357A US1403305A (en) | 1920-12-21 | 1920-12-21 | Magnet core and method of making the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US432357A US1403305A (en) | 1920-12-21 | 1920-12-21 | Magnet core and method of making the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1403305A true US1403305A (en) | 1922-01-10 |
Family
ID=23715801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US432357A Expired - Lifetime US1403305A (en) | 1920-12-21 | 1920-12-21 | Magnet core and method of making the same |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1403305A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE969848C (en) * | 1938-11-26 | 1958-07-24 | Telefunken Gmbh | High-frequency iron core, consisting of finely divided iron powder with a binding agent |
| US3213026A (en) * | 1962-03-29 | 1965-10-19 | Cabot Corp | Process for producing magnetic carbon black compositions |
| US4602957A (en) * | 1984-10-12 | 1986-07-29 | Emi Limited | Magnetic powder compacts |
-
1920
- 1920-12-21 US US432357A patent/US1403305A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE969848C (en) * | 1938-11-26 | 1958-07-24 | Telefunken Gmbh | High-frequency iron core, consisting of finely divided iron powder with a binding agent |
| US3213026A (en) * | 1962-03-29 | 1965-10-19 | Cabot Corp | Process for producing magnetic carbon black compositions |
| US4602957A (en) * | 1984-10-12 | 1986-07-29 | Emi Limited | Magnetic powder compacts |
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