US3257586A - Flexible permanent magnet and composition - Google Patents

Flexible permanent magnet and composition Download PDF

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Publication number
US3257586A
US3257586A US92912A US9291261A US3257586A US 3257586 A US3257586 A US 3257586A US 92912 A US92912 A US 92912A US 9291261 A US9291261 A US 9291261A US 3257586 A US3257586 A US 3257586A
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Prior art keywords
magnetic
composition
permanent magnet
magnetic layer
binder
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Expired - Lifetime
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US92912A
Inventor
Steingroever Erich
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Magnetfabrik Bonn GmbH
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Magnetfabrik Bonn GmbH
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    • 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
    • H01F1/0027—Thick magnetic films
    • 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
    • H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
    • H01F1/117—Flexible bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H01F7/021—Construction of PM
    • H01F7/0215—Flexible forms, sheets

Definitions

  • the invention relates to magnetic compositions prepared from permanently magnetic powders and a nonmagnetic binder.
  • Magnetic compositions of this type may be compressed into magnets or processed to instance by cementing.
  • Both parts are first sprayed separately as bands or profiles, or rolled to slabs (sheets), and then joined by rolling upon each other, cementing, pressing together, or similar treatments.
  • the resulting laminated bands or profiles can be directly employed asadhesiv molding strips.
  • Laminated sheets of substantial width may be divided into such bands.
  • the magnetizing of such adhesive moldings is carried out in an arc form so that the adhering surface has a magnetic north and south pole.
  • Suitable permanent magnetic materials ar compounds of the type BaO-6Fe O and alloys known under the names Alni and Alnico, which have the following composition:
  • such a sheet or slab is joined to a return piece 2, which has been made similarly to piece 1, but contains soft magnetic iron powder instead of a permanently magnetic powder.
  • BaO-6Fe O particles instead of using BaO-6Fe O particles as permanent SrO-6Fe O and PbO-6Fe O can mixture with each other.
  • thermoplastic resin such as homopolymers or copolymers or vinyl chloride, polyamides, cellulose acetate, also natural or synthetic rubbers may be used. I prefer to employ polyethylene.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Hard Magnetic Materials (AREA)

Description

June 1966 E. STEINGROEVER 3, 57,5 6
FLEXIBLE PERMANENT MAGNET AND COMPOSITION Filed March 2, 1961 I VENTOR N Ema/ STEINGROEVER United States Patent Office 3,257,586 Patented June 21, 1966 3 Claims. oi. 317-1ss) The invention relates to magnetic compositions prepared from permanently magnetic powders and a nonmagnetic binder.
Magnetic compositions of this type may be compressed into magnets or processed to instance by cementing.
I have found a particularly simple procedure for the manufacture of permanent magnets which are provided with magnetically soft conducting pieces.
Both parts are first sprayed separately as bands or profiles, or rolled to slabs (sheets), and then joined by rolling upon each other, cementing, pressing together, or similar treatments. The resulting laminated bands or profiles can be directly employed asadhesiv molding strips.
Laminated sheets of substantial width may be divided into such bands. The magnetizing of such adhesive moldings is carried out in an arc form so that the adhering surface has a magnetic north and south pole.
Suitable permanent magnetic materials ar compounds of the type BaO-6Fe O and alloys known under the names Alni and Alnico, which have the following composition:
Alni, Alnico,
-10 Fe balance balance and contain powdered permanently magnetic compositions of the type BaO-Fe O The particles of said magnetic materials are magnetically anisotropic and have the netic value of the material could not be fully utilized.
According to the present invention, such a sheet or slab, is joined to a return piece 2, which has been made similarly to piece 1, but contains soft magnetic iron powder instead of a permanently magnetic powder.
ably increased.
Instead of using BaO-6Fe O particles as permanent SrO-6Fe O and PbO-6Fe O can mixture with each other.
As nonmagnetic binders, any thermoplastic resin such as homopolymers or copolymers or vinyl chloride, polyamides, cellulose acetate, also natural or synthetic rubbers may be used. I prefer to employ polyethylene.
I claim:
References Cited by the Examiner UNITED STATES PATENTS 2,627,097 2/1953 Ellis 3l7159 2,698,917 1/1955 Van Urk et al 317-201 2,797,370 6/1957 Bennett 317-158 2,892,248 6/1959 Weber et al 29l55.6 2,900,344 8/1959 Stuyts et a] 317201 2,932,545 4/1960 Foley 317-201 X 2,959,832 11/1960 Baermann 317-158 2,965,953 12/1960 Baermann 29-155.6
BERNARD A. GILHEANY, Primary Examiner.
SAMUEL BERNSTEIN, JOHN F. BURNS, Examiners.
G. HARRIS, Assistant Examiner.

Claims (1)

1. A FLEXIBLE MAGNETIC MOLDING STRIP COMPRISING A PERMANENTLY MAGNETIC LAYER HAVING OPPOSITE FLAT SURFACES AND CONTAINING MAGNETIC PARTICLES EMBEDDED IN A NON-MAGNETIC BINDER, SAID MAGNETIC PARTICLES BEING MAGNETICALLY ANISOTROPIC AND MAGNETIZED IN A DIRECTION PERPENDICULAR TO SAID SURFACES, AND A SOFT MAGNETIC LAYER INTIMATELY JOINED TO ONE OF SAID SURFACES AND PRESENTING AN UNINTERRUPTED RETURN PATH FOR THE MAGNETIC FLUX WHEN THE OTHER OF SAID FLAT SURFACES IS ADHERED TO A FERROMAGNETIC BASE, SAID SOFT MAGNETIC LAYER CONSISTING ESSENTIALLY OF A NONMAGNETIC BINDER AND IRON PARTICLES DISPERSED THEREIN.
US92912A 1960-03-03 1961-03-02 Flexible permanent magnet and composition Expired - Lifetime US3257586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM44540A DE1172384B (en) 1960-03-03 1960-03-03 Magnetic flexible layer body

Publications (1)

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US3257586A true US3257586A (en) 1966-06-21

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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355209A (en) * 1965-05-10 1967-11-28 Magnetic Devices Inc Material handling device
US3408573A (en) * 1965-06-19 1968-10-29 Philips Corp Coil core manufactured from softmagnetic and permanent-magnetic materials
US3407507A (en) * 1967-04-10 1968-10-29 Reginald L. Brubaker Measuring instrument
US3460248A (en) * 1966-05-26 1969-08-12 Clarence R Tate Method for making micromagnets
US3464134A (en) * 1966-06-22 1969-09-02 Schenley Ind Inc Magnetic display
US3784945A (en) * 1972-06-28 1974-01-08 M Baermann Permanent magnet for suspension bearings
FR2219503A1 (en) * 1973-02-27 1974-09-20 Favre Joanny
US4004167A (en) * 1975-01-29 1977-01-18 Magna Motors Corporation Permanent magnet stators
US4105054A (en) * 1975-07-28 1978-08-08 Atlantic Richfield Company Vapor sealing means for fuel dispensing nozzles
US4184398A (en) * 1976-07-06 1980-01-22 Abe Siegelman Self generating electrical pickup for musical instruments
US4186609A (en) * 1977-03-04 1980-02-05 Max Baermann Eddy-current device for measuring rotational speed
US4187453A (en) * 1975-01-06 1980-02-05 Jim Zegeer Electric motor drive system
EP0065141A1 (en) * 1981-05-14 1982-11-24 General Electric Company Apparatus for x-ray examination of a body
EP0080160A1 (en) * 1981-11-20 1983-06-01 The B.F. GOODRICH Company Permanent magnets
US4484682A (en) * 1983-06-06 1984-11-27 Crow Robert T Container with magnet for holding it in position
US4701721A (en) * 1986-09-11 1987-10-20 American Telephone And Telegraph Company, At&T Bell Laboratories Core formed of hard and soft magnetic materials for an electrical relay apparatus
US4879338A (en) * 1985-02-13 1989-11-07 Raychem Corporation Poly(aryl ether ketone) compositions
US5047743A (en) * 1988-01-22 1991-09-10 Scesney Stanley P Integrated magnetic element
US5114517A (en) * 1989-10-30 1992-05-19 Schonstedt Instrument Company Methods, apparatus and devices relating to magnetic markers for elongated hidden objects
US5173139A (en) * 1989-03-15 1992-12-22 Schonstedt Instrument Company Method for providing magnetic markers on elongated hidden objects
US5204571A (en) * 1990-07-13 1993-04-20 Matsushita Electric Industrial Co., Ltd. Miniature electric motor with rubber stator magnet
US5206065A (en) * 1989-03-15 1993-04-27 Schonstedt Instrument Company Methods, apparatus and devices relating to magnetic markers for elongated hidden objects
US5280991A (en) * 1992-02-19 1994-01-25 Prince Corporation Headliner
WO1996037868A1 (en) * 1995-05-26 1996-11-28 Societe D'inventeurs B.M.G.W.V. Anti-theft magnetic tag and ink
US20030077481A1 (en) * 2001-10-19 2003-04-24 Michael Wu Soft complex magnet structure and method for manufacturing the soft complex magnet structure
US20050139739A1 (en) * 2003-12-31 2005-06-30 Hamerski Michael D. Magnetic-adhesive mounting device
US20110031431A1 (en) * 2009-08-04 2011-02-10 The Boeing Company Magnetic composite structures with high mechanical strength

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2627097A (en) * 1951-05-25 1953-02-03 Ellis Robert Flexible magnetic closure
US2698917A (en) * 1951-04-23 1955-01-04 Hartford Nat Bank & Trust Co Magnetic circuit comprising a ferromagnetic part having high permeability and a substantially flat, thin permanent magnet
US2797370A (en) * 1954-11-01 1957-06-25 Rutherford A Bennett Magnetic tape for lifting boxes or bags and other objects
US2892248A (en) * 1953-09-09 1959-06-30 Philips Corp Method of manufacturing sintered permanent magnets
US2900344A (en) * 1953-07-29 1959-08-18 Philips Corp Making anisotropic permanent magnets
US2932545A (en) * 1958-10-31 1960-04-12 Gen Electric Magnetic door latching arrangement for refrigerator
US2959832A (en) * 1957-10-31 1960-11-15 Baermann Max Flexible or resilient permanent magnets
US2965953A (en) * 1953-02-06 1960-12-27 Baermann Max Method of producing permanent magnets

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE913086C (en) * 1943-03-09 1954-06-08 Aeg Process for the production of press magnets
DE1711646U (en) * 1955-07-23 1955-11-24 Heinz Schackert MAGNETIC HOLDING DEVICE FOR FILMS, PAPERS OR. DGL.
DE1781718U (en) * 1957-02-09 1959-01-22 Max Baermann PROFILE STRIP ADHESIVE TO A FERROMAGNETIC SURFACE.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698917A (en) * 1951-04-23 1955-01-04 Hartford Nat Bank & Trust Co Magnetic circuit comprising a ferromagnetic part having high permeability and a substantially flat, thin permanent magnet
US2627097A (en) * 1951-05-25 1953-02-03 Ellis Robert Flexible magnetic closure
US2965953A (en) * 1953-02-06 1960-12-27 Baermann Max Method of producing permanent magnets
US2900344A (en) * 1953-07-29 1959-08-18 Philips Corp Making anisotropic permanent magnets
US2892248A (en) * 1953-09-09 1959-06-30 Philips Corp Method of manufacturing sintered permanent magnets
US2797370A (en) * 1954-11-01 1957-06-25 Rutherford A Bennett Magnetic tape for lifting boxes or bags and other objects
US2959832A (en) * 1957-10-31 1960-11-15 Baermann Max Flexible or resilient permanent magnets
US2932545A (en) * 1958-10-31 1960-04-12 Gen Electric Magnetic door latching arrangement for refrigerator

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355209A (en) * 1965-05-10 1967-11-28 Magnetic Devices Inc Material handling device
US3408573A (en) * 1965-06-19 1968-10-29 Philips Corp Coil core manufactured from softmagnetic and permanent-magnetic materials
US3460248A (en) * 1966-05-26 1969-08-12 Clarence R Tate Method for making micromagnets
US3464134A (en) * 1966-06-22 1969-09-02 Schenley Ind Inc Magnetic display
US3407507A (en) * 1967-04-10 1968-10-29 Reginald L. Brubaker Measuring instrument
US3784945A (en) * 1972-06-28 1974-01-08 M Baermann Permanent magnet for suspension bearings
FR2219503A1 (en) * 1973-02-27 1974-09-20 Favre Joanny
US4187453A (en) * 1975-01-06 1980-02-05 Jim Zegeer Electric motor drive system
US4004167A (en) * 1975-01-29 1977-01-18 Magna Motors Corporation Permanent magnet stators
US4105054A (en) * 1975-07-28 1978-08-08 Atlantic Richfield Company Vapor sealing means for fuel dispensing nozzles
US4184398A (en) * 1976-07-06 1980-01-22 Abe Siegelman Self generating electrical pickup for musical instruments
US4186609A (en) * 1977-03-04 1980-02-05 Max Baermann Eddy-current device for measuring rotational speed
EP0065141A1 (en) * 1981-05-14 1982-11-24 General Electric Company Apparatus for x-ray examination of a body
EP0080160A1 (en) * 1981-11-20 1983-06-01 The B.F. GOODRICH Company Permanent magnets
US4484682A (en) * 1983-06-06 1984-11-27 Crow Robert T Container with magnet for holding it in position
US4879338A (en) * 1985-02-13 1989-11-07 Raychem Corporation Poly(aryl ether ketone) compositions
US4701721A (en) * 1986-09-11 1987-10-20 American Telephone And Telegraph Company, At&T Bell Laboratories Core formed of hard and soft magnetic materials for an electrical relay apparatus
US5047743A (en) * 1988-01-22 1991-09-10 Scesney Stanley P Integrated magnetic element
US5206065A (en) * 1989-03-15 1993-04-27 Schonstedt Instrument Company Methods, apparatus and devices relating to magnetic markers for elongated hidden objects
US5173139A (en) * 1989-03-15 1992-12-22 Schonstedt Instrument Company Method for providing magnetic markers on elongated hidden objects
US5114517A (en) * 1989-10-30 1992-05-19 Schonstedt Instrument Company Methods, apparatus and devices relating to magnetic markers for elongated hidden objects
US5204571A (en) * 1990-07-13 1993-04-20 Matsushita Electric Industrial Co., Ltd. Miniature electric motor with rubber stator magnet
US5280991A (en) * 1992-02-19 1994-01-25 Prince Corporation Headliner
WO1996037868A1 (en) * 1995-05-26 1996-11-28 Societe D'inventeurs B.M.G.W.V. Anti-theft magnetic tag and ink
US20030077481A1 (en) * 2001-10-19 2003-04-24 Michael Wu Soft complex magnet structure and method for manufacturing the soft complex magnet structure
US20050139739A1 (en) * 2003-12-31 2005-06-30 Hamerski Michael D. Magnetic-adhesive mounting device
US20110031431A1 (en) * 2009-08-04 2011-02-10 The Boeing Company Magnetic composite structures with high mechanical strength
US9362036B2 (en) * 2009-08-04 2016-06-07 The Boeing Company Magnetic composite structures with high mechanical strength
US10692652B2 (en) 2009-08-04 2020-06-23 The Boeing Company Methods for manufacturing magnetic composite structures with high mechanical strength

Also Published As

Publication number Publication date
DE1172384B (en) 1964-06-18

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