GB1235402A - Improvements in or relating to magnetic transducers - Google Patents

Improvements in or relating to magnetic transducers

Info

Publication number
GB1235402A
GB1235402A GB32416/69A GB3241669A GB1235402A GB 1235402 A GB1235402 A GB 1235402A GB 32416/69 A GB32416/69 A GB 32416/69A GB 3241669 A GB3241669 A GB 3241669A GB 1235402 A GB1235402 A GB 1235402A
Authority
GB
United Kingdom
Prior art keywords
divisions
weight
core
relating
conductor
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
GB32416/69A
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.)
IIT Research Institute
Original Assignee
IIT Research Institute
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 IIT Research Institute filed Critical IIT Research Institute
Publication of GB1235402A publication Critical patent/GB1235402A/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
    • 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
    • Y10T29/49034—Treating to affect magnetic properties

Landscapes

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

Abstract

1,235,402. Annealing magnetic materials. 11T RESEARCH INSTITUTE. June 26, 1969 [July 22, 1968j, No.32416/69. Headings C7A and C7N. [Also in Divisions B3 and G4-6] In the manufacture of magnetic head cores from a binary Fe-Si alloy containing 3 to 7% by weight of Si and less than 0À05% by weight of carbon (see also Divisions B3 and G5) the core 37, 38 Fig.4 is magnetically annealed by clamping it in a stainless steel ring Fig. 5 (not shown), looping over an electric conductor 30 in a chamber 31, heating to 2000‹F. for 3% Si and 2050‹ F. for 6À5% Si (i.e. above the Curie temperature) in a dry hydrogen atmosphere for 15 minutes, and allowing to cool over several hours, current being passed through the conductor 30 to set up the magnetic field as the core cools from 1500‹F. to 500‹F.
GB32416/69A 1968-07-22 1969-06-26 Improvements in or relating to magnetic transducers Expired GB1235402A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74665168A 1968-07-22 1968-07-22

Publications (1)

Publication Number Publication Date
GB1235402A true GB1235402A (en) 1971-06-16

Family

ID=25001754

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32416/69A Expired GB1235402A (en) 1968-07-22 1969-06-26 Improvements in or relating to magnetic transducers

Country Status (3)

Country Link
US (1) US3582572A (en)
DE (1) DE1936817A1 (en)
GB (1) GB1235402A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5241509A (en) * 1975-09-29 1977-03-31 Canon Inc Magnetic head
DE2804380A1 (en) * 1978-02-02 1979-08-09 Bosch Gmbh Robert VIDEO MAGNETIC HEAD FOR RECORDING AND / OR PLAYING BACK A TELEVISION SIGNAL OR A SIMILAR BROADBAND SIGNAL OF HIGH LIMIT FREQUENCY. FROM A MAGNETIC TAPE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1809197A (en) * 1929-08-06 1931-06-09 Jr William Fendrich Method of production of generator armatures
US2489977A (en) * 1946-12-03 1949-11-29 Harry F Porter Laminated core
US2694754A (en) * 1950-06-12 1954-11-16 Lawrence H Connell Magnetic recording apparatus
US2991511A (en) * 1955-12-20 1961-07-11 Clevite Corp Method of making multichannel magnetic transducer heads
US3311711A (en) * 1963-07-29 1967-03-28 Mach Tronies Inc Resilient core holder for pressing head sections into alignment

Also Published As

Publication number Publication date
DE1936817A1 (en) 1970-01-29
US3582572A (en) 1971-06-01

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