GB2122949B - Differential-permeability field-concentrating magnetic writing head - Google Patents

Differential-permeability field-concentrating magnetic writing head

Info

Publication number
GB2122949B
GB2122949B GB08222715A GB8222715A GB2122949B GB 2122949 B GB2122949 B GB 2122949B GB 08222715 A GB08222715 A GB 08222715A GB 8222715 A GB8222715 A GB 8222715A GB 2122949 B GB2122949 B GB 2122949B
Authority
GB
United Kingdom
Prior art keywords
differential
writing head
magnetic writing
concentrating magnetic
permeability field
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
GB08222715A
Other versions
GB2122949A (en
Inventor
Gilbert Duane Springer
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.)
Ferix Corp
Original Assignee
Ferix Corp
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 Ferix Corp filed Critical Ferix Corp
Publication of GB2122949A publication Critical patent/GB2122949A/en
Application granted granted Critical
Publication of GB2122949B publication Critical patent/GB2122949B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Magnetic Heads (AREA)
GB08222715A 1982-05-26 1982-08-06 Differential-permeability field-concentrating magnetic writing head Expired GB2122949B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38192282A 1982-05-26 1982-05-26

Publications (2)

Publication Number Publication Date
GB2122949A GB2122949A (en) 1984-01-25
GB2122949B true GB2122949B (en) 1985-10-23

Family

ID=23506870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08222715A Expired GB2122949B (en) 1982-05-26 1982-08-06 Differential-permeability field-concentrating magnetic writing head

Country Status (10)

Country Link
JP (1) JPS58211178A (en)
BE (1) BE894201A (en)
BR (1) BR8205722A (en)
CA (1) CA1189969A (en)
DE (1) DE3302172A1 (en)
FR (1) FR2527820A1 (en)
GB (1) GB2122949B (en)
IT (1) IT1209905B (en)
NL (1) NL8300256A (en)
SE (1) SE8204518L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494125A (en) * 1982-05-26 1985-01-15 Ferix Corporation Differential-permeability field-concentrating magnetic read/write head
US7538977B2 (en) * 2004-04-30 2009-05-26 Hitachi Global Storage Technologies B.V. Method and apparatus for providing diamagnetic flux focusing in a storage device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL215946A (en) * 1956-04-03
GB1344890A (en) * 1971-08-21 1974-01-23 Ibm Electromagnetic transducers
DE2520581C3 (en) * 1975-05-09 1980-09-04 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Arrangement for erasable recording of measured quantities
DE2715103C2 (en) * 1977-04-04 1985-05-02 Wang Laboratories, Inc., Lowell, Mass. Magnetic print head of a printing device
US4414554A (en) * 1980-07-21 1983-11-08 Ferix Corporation Magnetic imaging apparatus

Also Published As

Publication number Publication date
JPS58211178A (en) 1983-12-08
CA1189969A (en) 1985-07-02
SE8204518L (en) 1983-11-27
DE3302172A1 (en) 1983-12-01
BE894201A (en) 1983-02-25
NL8300256A (en) 1983-12-16
IT8249149A0 (en) 1982-09-21
IT1209905B (en) 1989-08-30
SE8204518D0 (en) 1982-07-30
FR2527820A1 (en) 1983-12-02
GB2122949A (en) 1984-01-25
BR8205722A (en) 1984-04-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee