GB1036897A - Improvements in or relating to methods of manufacturing yokes for magnetic heads - Google Patents

Improvements in or relating to methods of manufacturing yokes for magnetic heads

Info

Publication number
GB1036897A
GB1036897A GB17159/63A GB1715963A GB1036897A GB 1036897 A GB1036897 A GB 1036897A GB 17159/63 A GB17159/63 A GB 17159/63A GB 1715963 A GB1715963 A GB 1715963A GB 1036897 A GB1036897 A GB 1036897A
Authority
GB
United Kingdom
Prior art keywords
spacers
yokes
magnetic heads
assembly
gap
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
GB17159/63A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1036897A publication Critical patent/GB1036897A/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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/23—Gap features
    • G11B5/232—Manufacture of gap
    • 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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S228/00—Metal fusion bonding
    • Y10S228/903—Metal to nonmetal
    • 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
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49055—Fabricating head structure or component thereof with bond/laminating preformed parts, at least two magnetic
    • Y10T29/49057—Using glass bonding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

1,036,897. Making magnetic heads. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. May 1, 1963, [May 4, 1962], No. 17159/63. Heading B3A. [Also in Division G5] In the manufacture of yokes for magnetic heads, two profiled core elements 1, 6 of sintered oxidic ferromagnetic material are placed together with their polished gap limiting surfaces facing each other and separated by spacers 4 equal in thickness to the desired gap, between each pair of spacers is provided a glass rod 5 of a volume at least 30% greater than that of the gap, the assembly is then heated under pressure to melt the glass whereby the two elements move together until separated by the spacers and after cooling, the assembly is divided into a plurality of yokes by a mechanical operation. The spacers may be of beryllium copper or mica and transverse grooves 12, Fig. 2 (not shown), are provided adjacent the spacers to prevent glass penetrating between the elements and spaces. Dividing of the assembly is effected by sawing.
GB17159/63A 1962-05-04 1963-05-01 Improvements in or relating to methods of manufacturing yokes for magnetic heads Expired GB1036897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL278093 1962-05-04

Publications (1)

Publication Number Publication Date
GB1036897A true GB1036897A (en) 1966-07-20

Family

ID=19753803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17159/63A Expired GB1036897A (en) 1962-05-04 1963-05-01 Improvements in or relating to methods of manufacturing yokes for magnetic heads

Country Status (6)

Country Link
US (1) US3375575A (en)
AT (1) AT255790B (en)
CH (1) CH412378A (en)
DK (1) DK108219C (en)
GB (1) GB1036897A (en)
NL (2) NL123062C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1227704A (en) * 1968-03-15 1971-04-07
US3688056A (en) * 1970-05-21 1972-08-29 Honeywell Inc Magnetic transducer heads
US3737065A (en) * 1971-04-28 1973-06-05 Zenith Radio Corp Envelope for, and method of processing, a color cathode-ray tube
JPS5427132B2 (en) * 1974-02-21 1979-09-07
US4106173A (en) * 1975-06-13 1978-08-15 Olympus Optical Co., Ltd. Method of manufacturing magnetic heads
JPS5217808A (en) * 1975-07-31 1977-02-10 Olympus Optical Co Ltd Manufacturing method of magnetic head
US4173065A (en) * 1977-03-16 1979-11-06 Olympus Optical Co., Ltd. Method of manufacturing a magnetic head
NL8003518A (en) * 1980-06-18 1982-01-18 Philips Nv MAGNETIC HEAD, METHOD FOR MANUFACTURING A MAGNETIC HEAD.
JPS59203213A (en) * 1983-05-04 1984-11-17 Sumitomo Special Metals Co Ltd Magnetic substrate of groove structure and its production
DE3626307A1 (en) * 1986-08-02 1988-02-11 Grundig Emv METHOD FOR ATTACHING A VIDEO MAGNETIC HEAD

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2346555A (en) * 1937-10-09 1944-04-11 Weston Electrical Instr Corp Method of producing magnetic structures
NL66936C (en) * 1946-03-04
US2707694A (en) * 1950-10-19 1955-05-03 Standring Joseph Robert Method of adhesively joining metal, wood and plastic parts
US2728054A (en) * 1951-09-20 1955-12-20 Steatite Res Corp Ferromagnetic ceramic inductance core
US3094772A (en) * 1956-07-26 1963-06-25 Philips Corp Method of producing magnetic heads with accurately predetermined gap heights
US3117367A (en) * 1958-07-03 1964-01-14 Philips Corp Method of manufactuirng a magnetic head having a glass spacer
NL243050A (en) * 1959-09-05
US3079470A (en) * 1959-12-21 1963-02-26 Armour Res Found Magnetic transducer head
NL277285A (en) * 1961-04-17

Also Published As

Publication number Publication date
DK108219C (en) 1967-10-16
CH412378A (en) 1966-04-30
AT255790B (en) 1967-07-25
NL123062C (en)
NL278093A (en)
US3375575A (en) 1968-04-02

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