FR2273338B1 - - Google Patents

Info

Publication number
FR2273338B1
FR2273338B1 FR7502832A FR7502832A FR2273338B1 FR 2273338 B1 FR2273338 B1 FR 2273338B1 FR 7502832 A FR7502832 A FR 7502832A FR 7502832 A FR7502832 A FR 7502832A FR 2273338 B1 FR2273338 B1 FR 2273338B1
Authority
FR
France
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
FR7502832A
Other languages
French (fr)
Other versions
FR2273338A1 (en
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Priority claimed from US450139A external-priority patent/US3921340A/en
Priority claimed from US05/450,138 external-priority patent/US3955213A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2273338A1 publication Critical patent/FR2273338A1/fr
Application granted granted Critical
Publication of FR2273338B1 publication Critical patent/FR2273338B1/fr
Granted 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
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • 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
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Heads (AREA)
FR7502832A 1974-03-11 1975-01-20 Magnetic head recording or scanning - has magneto-electrical transducer and head section in one piece Granted FR2273338A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US45013774A 1974-03-11 1974-03-11
US450139A US3921340A (en) 1974-03-11 1974-03-11 Magnetic head surface formation apparatus and method
US05/450,138 US3955213A (en) 1974-03-11 1974-03-11 Intermediate product assembly of a magnetic head

Publications (2)

Publication Number Publication Date
FR2273338A1 FR2273338A1 (en) 1975-12-26
FR2273338B1 true FR2273338B1 (hr) 1977-11-18

Family

ID=27412434

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7502832A Granted FR2273338A1 (en) 1974-03-11 1975-01-20 Magnetic head recording or scanning - has magneto-electrical transducer and head section in one piece

Country Status (2)

Country Link
DE (1) DE2509452C2 (hr)
FR (1) FR2273338A1 (hr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681682A (en) * 1970-12-21 1972-08-01 Ibm Method and apparatus for testing gap surface finish and winding characteristics of a magnetic head subassembly
JPS5224404B1 (hr) * 1971-04-29 1977-07-01

Also Published As

Publication number Publication date
DE2509452C2 (de) 1986-09-11
DE2509452A1 (de) 1975-09-18
FR2273338A1 (en) 1975-12-26

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Legal Events

Date Code Title Description
ST Notification of lapse