FR2142972A1 - - Google Patents

Info

Publication number
FR2142972A1
FR2142972A1 FR7220575A FR7220575A FR2142972A1 FR 2142972 A1 FR2142972 A1 FR 2142972A1 FR 7220575 A FR7220575 A FR 7220575A FR 7220575 A FR7220575 A FR 7220575A FR 2142972 A1 FR2142972 A1 FR 2142972A1
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.)
Withdrawn
Application number
FR7220575A
Other languages
French (fr)
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.)
Ampex Corp
Original Assignee
Ampex 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 Ampex Corp filed Critical Ampex Corp
Publication of FR2142972A1 publication Critical patent/FR2142972A1/fr
Withdrawn legal-status Critical Current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
    • G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles
    • 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
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • 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
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
    • G11B5/1335—Assembling or shaping of elements
    • 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
    • G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than one track
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
FR7220575A 1971-06-25 1972-06-08 Withdrawn FR2142972A1 (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15680271A 1971-06-25 1971-06-25

Publications (1)

Publication Number Publication Date
FR2142972A1 true FR2142972A1 (enExample) 1973-02-02

Family

ID=22561150

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7220575A Withdrawn FR2142972A1 (enExample) 1971-06-25 1972-06-08

Country Status (4)

Country Link
US (1) US3761641A (enExample)
CA (1) CA951014A (enExample)
FR (1) FR2142972A1 (enExample)
GB (1) GB1339415A (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893189A (en) * 1974-01-14 1975-07-01 Spin Physics Inc Magnetic record/reproduce head and manufacturing method therefor
US4084199A (en) * 1976-10-26 1978-04-11 Spin Physics, Inc. High density multitrack magnetic head
US4293884A (en) * 1979-12-26 1981-10-06 Ampex Corporation Multiple leg magnetic transducer structure
JPS58130421A (ja) * 1982-01-28 1983-08-03 Victor Co Of Japan Ltd 磁気ヘツド及びその製造方法
US4533967A (en) * 1982-10-22 1985-08-06 Ampex Corporation Multiple leg multichannel magnetic transducer structure and method of manufacturing
US4750257A (en) * 1984-12-20 1988-06-14 Lff & Associates Method for making a magnet transducer assembly
JPH061528B2 (ja) * 1985-09-27 1994-01-05 株式会社三協精機製作所 磁気ヘツドの組み立て方法
US4949208A (en) * 1988-04-13 1990-08-14 Eastman Kodak Company Multihead magnetic head assembly having a single piece faceplate of magnetic ferrite
US4825532A (en) * 1988-04-13 1989-05-02 Eastman Kodak Company Method for making a multi-head magnetic head assembly
JPH0696409A (ja) * 1992-09-10 1994-04-08 Tdk Corp 磁気ヘッドの製造方法
US11201500B2 (en) 2006-01-31 2021-12-14 Mojo Mobility, Inc. Efficiencies and flexibilities in inductive (wireless) charging
US20110050164A1 (en) * 2008-05-07 2011-03-03 Afshin Partovi System and methods for inductive charging, and improvements and uses thereof
US8890470B2 (en) 2010-06-11 2014-11-18 Mojo Mobility, Inc. System for wireless power transfer that supports interoperability, and multi-pole magnets for use therewith
US11342777B2 (en) 2011-01-18 2022-05-24 Mojo Mobility, Inc. Powering and/or charging with more than one protocol
US11444485B2 (en) 2019-02-05 2022-09-13 Mojo Mobility, Inc. Inductive charging system with charging electronics physically separated from charging coil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564520A (en) * 1963-12-02 1971-02-16 Ampex Magnetic head assembly
US3353261A (en) * 1964-12-30 1967-11-21 Ibm Method of making a multitrack magnetic transducer head
US3557266A (en) * 1967-02-09 1971-01-19 Matsushita Electric Industrial Co Ltd Method of eliminating the porosity and controlling the grain size of a ferrite body by a two stage hot pressing treatment
US3605259A (en) * 1968-03-06 1971-09-20 Matsushita Electric Industrial Co Ltd Method of manufacturing a pair of pole pieces for a magnetic head
US3577634A (en) * 1969-06-18 1971-05-04 Ibm Method of manufacturing a magnetic head assembly

Also Published As

Publication number Publication date
GB1339415A (en) 1973-12-05
CA951014A (en) 1974-07-09
US3761641A (en) 1973-09-25

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Legal Events

Date Code Title Description
ST Notification of lapse