US1381460A - Magnet-core - Google Patents

Magnet-core Download PDF

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Publication number
US1381460A
US1381460A US348692A US34869219A US1381460A US 1381460 A US1381460 A US 1381460A US 348692 A US348692 A US 348692A US 34869219 A US34869219 A US 34869219A US 1381460 A US1381460 A US 1381460A
Authority
US
United States
Prior art keywords
particles
magnet
core
cores
mass
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
Application number
US348692A
Inventor
Jonathan W Harris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US348692A priority Critical patent/US1381460A/en
Application granted granted Critical
Publication of US1381460A publication Critical patent/US1381460A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49076—From comminuted material

Definitions

  • NEW YORK, N. Y., L CORPORATION OI means-cons.
  • This invention relates to magnet cores and particularly to loading coil cores composed of finely divided magnetic material and insulating material separating the particles of ma etic materia the mass being compresse into a self-sustaining solid by high pressure.
  • Magnet cores of t is general type are described and claimed in United States” gatents to Speed. No. 1,274,952 and Elmen 0. 1,286,965.
  • the present invention is the result of the discovery that a magnetic core of this type has characteristics'which are advantageous under certain conditions, if the particles before compression into a core have been formed into thin flakes.
  • the invention is-applicable to any ma netic material, such as iron, nickel, coba t or alloys containm ticles to be flattene may be obtained in any suitable manner, for example, in the case of iron, nickel or cobalt, y grindin up electrolytically deposited sheets of t ose metals.
  • the particles should be large in comparison with those usually used in making'magnet cores of this genera type, for exam le, as lar as will pass through a it-m screen.
  • the particles should be annealed in any suitable .iorm of furuses in order to make them mechanically soft so that during the subsequent flattening operation they will not merely break up.
  • stamping, hammering or re ing apparatus stamping, hammering or re ing apparatus.
  • the smaller particles are flattened out and the larger particles are broken up and the resultant pleces are flattened out, until the whole mass consists for the most part of small thin flakes.
  • Flattened particles of magnetic material obtained in the manner explained above, may be coated with insulating material and a mass of such insulated particles ma be compressed into aselflsustaining soli in the manner descrigd in the hereinbefore mentioned patents. O'wi to the fact that the flattening process mec anically hardens the particles, magnet cores made therefrom hysteretic characteristic and good magnetic stability, characteristics which are particularly'desirable in cores of loading 00118 which are to be used in combined telephone and telegraph circuits.
  • a magnet core com of magnetic material in the form of flattened particles, and insulating material separating the particles said compound being compressed into a seli-sustainin solid.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)

Description

UNITED STATES PATENT orslcs.
:onurm w. HARRIS, or ammonia, nnno'rnlo comm, mcoaronarnn,
smw roan.
NEW JERSEY, 8161103 To WE 81m 0] NEW YORK, N. Y., L CORPORATION OI means-cons.
1,381,460. Io Drawing.
To allwhomitmay concern:
- Be it known that I, JONATHAN W. Hamus, a citizen of the United States residing at Montclair in the county of Essex, tate of New ersey, have invented certain new and useful Improvements in Magnet-Cores, of which the following is a full, clear, condad and exact description.
This invention relates to magnet cores and particularly to loading coil cores composed of finely divided magnetic material and insulating material separating the particles of ma etic materia the mass being compresse into a self-sustaining solid by high pressure. Magnet cores of t is general type are described and claimed in United States" gatents to Speed. No. 1,274,952 and Elmen 0. 1,286,965. The present invention is the result of the discovery that a magnetic core of this type has characteristics'which are advantageous under certain conditions, if the particles before compression into a core have been formed into thin flakes.
The invention is-applicable to any ma netic material, such as iron, nickel, coba t or alloys containm ticles to be flattene may be obtained in any suitable manner, for example, in the case of iron, nickel or cobalt, y grindin up electrolytically deposited sheets of t ose metals. Preferably, the particles should be large in comparison with those usually used in making'magnet cores of this genera type, for exam le, as lar as will pass through a it-m screen. i electrolytically produced material is used, the particles should be annealed in any suitable .iorm of furuses in order to make them mechanically soft so that during the subsequent flattening operation they will not merely break up.
stamping, hammering or re ing apparatus.
have a low am of utt r: un Patented June 14, 1921. Application filed December 81, 1819. Iertal Io. 848,888.,
The smaller particles are flattened out and the larger particles are broken up and the resultant pleces are flattened out, until the whole mass consists for the most part of small thin flakes.
Flattened particles of magnetic material, obtained in the manner explained above, may be coated with insulating material and a mass of such insulated particles ma be compressed into aselflsustaining soli in the manner descrigd in the hereinbefore mentioned patents. O'wi to the fact that the flattening process mec anically hardens the particles, magnet cores made therefrom hysteretic characteristic and good magnetic stability, characteristics which are particularly'desirable in cores of loading 00118 which are to be used in combined telephone and telegraph circuits.
What is claimed is 1. The method of making magnet cores which consists in reducin magnetic material to the form of partic es, flattening said '-said particles to pressure sufficient to comsaid metals. The par ing material, ,and submitting a mass of said cient to compress particles to pressure the mass into a self-sustw solid.
8. A magnet core com of magnetic material in the form of flattened particles, and insulating material separating the particles said compound being compressed into a seli-sustainin solid.
In witness w ereof, I hereunto subscribe my name this 80th day of December, A. D. 1919.
am w. mums.
ytic mag-.
US348692A 1919-12-31 1919-12-31 Magnet-core Expired - Lifetime US1381460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US348692A US1381460A (en) 1919-12-31 1919-12-31 Magnet-core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US348692A US1381460A (en) 1919-12-31 1919-12-31 Magnet-core

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US1381460A true US1381460A (en) 1921-06-14

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682021A (en) * 1949-12-16 1954-06-22 Gustaf W Elmen Shredded magnetic core and method of making same
US2689398A (en) * 1948-03-24 1954-09-21 Plessey Co Ltd Method of making magnetizable compacts
US2864734A (en) * 1958-12-16 Magnetic flake core and method of
US2873225A (en) * 1957-05-20 1959-02-10 Adams Edmond Magnetic flake core
US2937964A (en) * 1957-07-23 1960-05-24 Adams Edmond Magnetic flake core
US3876389A (en) * 1970-06-30 1975-04-08 Ibm Composite material, inclusions thereof, and method therefor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864734A (en) * 1958-12-16 Magnetic flake core and method of
US2689398A (en) * 1948-03-24 1954-09-21 Plessey Co Ltd Method of making magnetizable compacts
US2682021A (en) * 1949-12-16 1954-06-22 Gustaf W Elmen Shredded magnetic core and method of making same
US2873225A (en) * 1957-05-20 1959-02-10 Adams Edmond Magnetic flake core
US2937964A (en) * 1957-07-23 1960-05-24 Adams Edmond Magnetic flake core
US3876389A (en) * 1970-06-30 1975-04-08 Ibm Composite material, inclusions thereof, and method therefor

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