GB1025616A - Flexible permanent magnet devices - Google Patents

Flexible permanent magnet devices

Info

Publication number
GB1025616A
GB1025616A GB546663A GB546663A GB1025616A GB 1025616 A GB1025616 A GB 1025616A GB 546663 A GB546663 A GB 546663A GB 546663 A GB546663 A GB 546663A GB 1025616 A GB1025616 A GB 1025616A
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
binder
magnetic
strip
plastic
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
Application number
GB546663A
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.)
Aerojet Rocketdyne Holdings Inc
Original Assignee
General Tire and Rubber Co
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 General Tire and Rubber Co filed Critical General Tire and Rubber Co
Publication of GB1025616A publication Critical patent/GB1025616A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Abstract

1,025,616. Magnetic holding devices; magnetic structures. GENERAL TIRE & RUBBER CO. Feb. 11, 1963 [Jan. 21, 1962], No. 5466/63. Headings H1H and H1P. [Also in Divisions B5 and E2] A flexible permanent magnet device for use as a door latch comprises a flexible sheet containing permanent magnet material 10 in a plastic matrix in back-to-face contact with a second flexible sheet containing high permeability material 12 in a plastics matrix. The two strips may be bonded together or held in contact by means of an enclosing plastic sleeve 14 to give a greater attractive force than would be obtained from the magnet strip alone. 25-95% by weight of finely powdered (60-mesh sieve or smaller) ceramic ferrite material, e.g. barium or strontium ferrite, mixed with 5-75% by weight of binder material is used to form the permanent magnet strip. A recommended mixture would be 90 parts of finely powdered (100-mesh sieve) and 10 parts of binder. For the high permeability backing strip powdered iron is mixed with the binder material in the same proportions. Any non-magnetic plastic or elastomeric material may be used for the binder material. The permanent magnet strip may -be magnetized before or after assembly and dimensions of suitable strips are given. Reference has been directed by the Comptroller to Specification' 903,287 and 950,277.
GB546663A 1962-02-21 1963-02-11 Flexible permanent magnet devices Expired GB1025616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17481462A 1962-02-21 1962-02-21

Publications (1)

Publication Number Publication Date
GB1025616A true GB1025616A (en) 1966-04-14

Family

ID=22637627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB546663A Expired GB1025616A (en) 1962-02-21 1963-02-11 Flexible permanent magnet devices

Country Status (1)

Country Link
GB (1) GB1025616A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472046A1 (en) * 1979-12-20 1981-06-26 Colgate Palmolive Co DISPENSER OF PACKAGING AGENT, IN PARTICULAR FOR LAUNDRYING LAUNDRY AND COMPRISING SAME
GB2173244A (en) * 1985-03-07 1986-10-08 Tamao Morita Magnetic fastener device
US5000417A (en) * 1989-04-07 1991-03-19 Lec Kabushiki Kaisha Magnetic fixing member for a paper box
US8893955B2 (en) 2010-10-27 2014-11-25 Intercontinental Great Brands Llc Releasably closable product accommodating package

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472046A1 (en) * 1979-12-20 1981-06-26 Colgate Palmolive Co DISPENSER OF PACKAGING AGENT, IN PARTICULAR FOR LAUNDRYING LAUNDRY AND COMPRISING SAME
GB2173244A (en) * 1985-03-07 1986-10-08 Tamao Morita Magnetic fastener device
US5000417A (en) * 1989-04-07 1991-03-19 Lec Kabushiki Kaisha Magnetic fixing member for a paper box
US8893955B2 (en) 2010-10-27 2014-11-25 Intercontinental Great Brands Llc Releasably closable product accommodating package

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