GB950483A - Improved magnetic tape recorder heads - Google Patents

Improved magnetic tape recorder heads

Info

Publication number
GB950483A
GB950483A GB4241860A GB4241860A GB950483A GB 950483 A GB950483 A GB 950483A GB 4241860 A GB4241860 A GB 4241860A GB 4241860 A GB4241860 A GB 4241860A GB 950483 A GB950483 A GB 950483A
Authority
GB
United Kingdom
Prior art keywords
magnetic
soft
head
polepieces
dipped
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
GB4241860A
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.)
Individual
Original Assignee
Individual
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
Priority to CA705558A priority Critical patent/CA705558A/en
Application filed by Individual filed Critical Individual
Priority to GB4241860A priority patent/GB950483A/en
Priority to FR846969A priority patent/FR1276248A/en
Publication of GB950483A publication Critical patent/GB950483A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

950,483. Making magnetic recording heads. E. ADAMS, and W. M. HUBBARD. Dec. 9, 1960, No. 42418/60. Heading B3A. [Also in Division G5] A core for a magnetic record/ playback head of good wearing properties is made by metallurgically uniting a body portion 24 (46, 52) of magnetically and mechanically soft material to polepieces 22 (48, 51) of magnetically soft but mechanically hard material. A solid member 24 may be either dipped into a heap of powder of the material 22 and an electric current passed to provide an agglomerate fused or sintered to the member 24 (Fig. 1, not shown) or it may be dipped in the presence of helium into a bath of the material 22 in a molten state (Fig. 2, not shown) and the portion 22 machined to shape, or alternatively, sheets 26, 28 of the materials may be resistance-welded along their adjoining edges and laminations stamped out and assembled into a core-member of suitable thickness, Fig. 6. Heattreatment to develop both the mechanical and magnetic properties to a desired state and conventional assembly to a head, Fig. 8, are not detailed, but the choice of appropriate component materials can improve the head performance (Fig. 7, not shown). The body portions are made from known nickel/iron or other " soft " magnetic alloys, while the choice of material for the polepieces includes aluminium/iron alloys described in Specification 931,037 and in U.S.A. Specifications 2,193,768, 2,768,915, 2,801,942 and 2,859,143 which are referred to.
GB4241860A 1960-12-09 1960-12-09 Improved magnetic tape recorder heads Expired GB950483A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA705558A CA705558A (en) 1960-12-09 Magnetic tape recorder heads
GB4241860A GB950483A (en) 1960-12-09 1960-12-09 Improved magnetic tape recorder heads
FR846969A FR1276248A (en) 1960-12-09 1960-12-15 Improvements to magnetic transducer heads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4241860A GB950483A (en) 1960-12-09 1960-12-09 Improved magnetic tape recorder heads

Publications (1)

Publication Number Publication Date
GB950483A true GB950483A (en) 1964-02-26

Family

ID=10424321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4241860A Expired GB950483A (en) 1960-12-09 1960-12-09 Improved magnetic tape recorder heads

Country Status (3)

Country Link
CA (1) CA705558A (en)
FR (1) FR1276248A (en)
GB (1) GB950483A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629519A (en) * 1967-05-23 1971-12-21 Rca Corp Magnetic heads with poles joined by molecular transport bonding

Also Published As

Publication number Publication date
FR1276248A (en) 1961-11-17
CA705558A (en) 1965-03-09

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