SE400402B - Magnethuvud - Google Patents

Magnethuvud

Info

Publication number: SE400402B
Authority: SE; Sweden
Prior art keywords: magnetic head; magnetic; head
Prior art date: 1973-08-10

Application number

SE7409316A

Other languages

English (en)

Other versions

SE7409316L (sv

Inventor

W W Childers

K H Elser

P J Peterson

Original Assignee

Ibm

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.)

1973-08-10

Filing date

1974-07-17

Publication date

1978-03-20

1974-07-17 Application filed by Ibm filed Critical Ibm

1975-02-11 Publication of SE7409316L publication Critical patent/SE7409316L/xx

1978-03-20 Publication of SE400402B publication Critical patent/SE400402B/sv

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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/03—Biasing
- 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
- G11B5/1272—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
- G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same 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
- Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
- 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)
Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

SE7409316A 1973-08-10 1974-07-17 Magnethuvud SE400402B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US00387564A US3846840A (en)	1973-08-10	1973-08-10	Read/write and longitudinal edge erase head assembly having multiple similarly shaped layers

Publications (2)

Publication Number	Publication Date
SE7409316L SE7409316L (sv)	1975-02-11
SE400402B true SE400402B (sv)	1978-03-20

Family

ID=23530425

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7409316A SE400402B (sv)	1973-08-10	1974-07-17	Magnethuvud

Country Status (10)

Country	Link
US (1)	US3846840A (sv)
JP (1)	JPS5331763B2 (sv)
BE (1)	BE818701A (sv)
CA (1)	CA1031861A (sv)
DE (1)	DE2437094C3 (sv)
FR (1)	FR2240495B1 (sv)
GB (1)	GB1422509A (sv)
IT (1)	IT1015220B (sv)
NL (1)	NL7410455A (sv)
SE (1)	SE400402B (sv)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5118519A (ja) *	1974-08-06	1976-02-14	Matsushita Electric Ind Co Ltd	Jikihetsudosochi
US4115827A (en) *	1975-09-22	1978-09-19	Ampex Corporation	Magnetic transducer for narrow track recording and playback
US4058846A (en) *	1976-06-21	1977-11-15	International Business Machines Corporation	Grounded transducer for magnetic record disks
US4110804A (en) *	1977-07-21	1978-08-29	International Business Machines Corporation	Read/write and tunnel erase magnetic head assembly
NL7803231A (nl) *	1978-03-28	1979-10-02	Philips Nv	Magnetische wiskop.
US4300179A (en) *	1979-09-04	1981-11-10	Minnesota Mining And Manufacturing Co.	Composite magnetic head with multitrack support structure
US4276574A (en) *	1979-12-06	1981-06-30	International Business Machines Corporation	Read/write and tunnel erase magnetic head assembly
JPS56156920A (en) *	1980-04-30	1981-12-03	Toshiba Corp	Composite magnetic head and its production
JPS5769524A (en) *	1980-10-17	1982-04-28	Ricoh Co Ltd	Magnetic head
JPS57120309A (en) *	1981-01-19	1982-07-27	Canon Inc	Manufacture of magnetic core
US4368548A (en) *	1981-01-26	1983-01-18	Glass Henry P	Nestable undercut bedpan
JPS57181424A (en) *	1981-04-30	1982-11-08	Hitachi Metals Ltd	Magnetic head device
JPS5965922A (ja) *	1982-10-07	1984-04-14	Sumitomo Special Metals Co Ltd	磁気ヘツド組立体
EP0110513A3 (en) *	1982-10-19	1985-09-18	EASTMAN KODAK COMPANY (a New Jersey corporation)	Common reluctance path multi-gap magnetic transducer
JPS59185015A (ja) *	1983-04-04	1984-10-20	Hitachi Ltd	磁気ヘツドおよびその製造方法
JPS60226455A (ja) *	1984-04-19	1985-11-11	日立金属株式会社	磁気ヘツド用非磁性セラミツクス
EP0197158B1 (en) *	1984-10-05	1993-01-13	Olympus Optical Co., Ltd.	Compound magnetic head
JPS61196412A (ja) *	1985-02-27	1986-08-30	Mitsubishi Electric Corp	磁気ヘツドとその製造方法
JPS61227209A (ja) *	1985-03-30	1986-10-09	Toshiba Corp	磁気ヘツド
US4686596A (en) *	1985-06-27	1987-08-11	Minnesota Mining And Manufacturing Company	Recording head core yoke and method of manufacture
US4750071A (en) *	1985-08-28	1988-06-07	Canon Denshi Kabushiki Kaisha	Magnetic head assembly including a pair of heads disposed in the vicinity of each other
JPH0249207A (ja) *	1988-08-09	1990-02-19	Nec Corp	磁気ヘッド
US20080074227A1 (en) *	2006-09-21	2008-03-27	Ford Global Technologies, Llc	Inductor topologies with substantial common-mode and differential-mode inductance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3557445A (en) *	1968-01-02	1971-01-26	Honeywell Inc	Method of fabricating slant cores
NL157442B (nl) *	1968-08-22	1978-07-17	Philips Nv	Werkwijze voor het vervaardigen van een poolschoeneenheid voor een magneetkop, alsmede poolschoeneenheid vervaardigd volgens deze werkwijze.

1973
- 1973-08-10 US US00387564A patent/US3846840A/en not_active Expired - Lifetime
1974
- 1974-06-17 FR FR7422157A patent/FR2240495B1/fr not_active Expired
- 1974-06-20 IT IT24189/74A patent/IT1015220B/it active
- 1974-07-09 JP JP7792674A patent/JPS5331763B2/ja not_active Expired
- 1974-07-17 SE SE7409316A patent/SE400402B/sv not_active IP Right Cessation
- 1974-07-17 GB GB3160174A patent/GB1422509A/en not_active Expired
- 1974-08-01 DE DE2437094A patent/DE2437094C3/de not_active Expired
- 1974-08-05 NL NL7410455A patent/NL7410455A/xx not_active Application Discontinuation
- 1974-08-09 BE BE147481A patent/BE818701A/xx not_active IP Right Cessation
- 1974-08-09 CA CA206,753A patent/CA1031861A/en not_active Expired

Also Published As

Publication number	Publication date
US3846840A (en)	1974-11-05
SE7409316L (sv)	1975-02-11
JPS5040118A (sv)	1975-04-12
BE818701A (fr)	1974-12-02
CA1031861A (en)	1978-05-23
DE2437094A1 (de)	1975-03-20
GB1422509A (en)	1976-01-28
NL7410455A (nl)	1975-02-12
FR2240495A1 (sv)	1975-03-07
DE2437094B2 (sv)	1979-07-12
DE2437094C3 (de)	1980-03-06
IT1015220B (it)	1977-05-10
JPS5331763B2 (sv)	1978-09-05
FR2240495B1 (sv)	1976-06-25

Legal Events

Date

Code

Title

Description

1995-01-31

NUG

Patent has lapsed

Ref document number: 7409316-2

Effective date: 19920210

Format of ref document f/p: F

Publication	Publication Date	Title
SE396253B (sv)	1977-09-12	Magnethuvud
SE400404B (sv)	1978-03-20	Magnethuvud
SE400403B (sv)	1978-03-20	Magnethuvud
SE401284B (sv)	1978-04-24	Magnetoresistivt magnethuvud
DK133758C (da)	1976-11-29	Magnetventil
IT991645B (it)	1975-08-30	Testina magnetica
SE400402B (sv)	1978-03-20	Magnethuvud
AT334993B (de)	1977-02-10	Magnetwicklungsdraht
IT1018850B (it)	1977-10-20	Bussola magnetica
AT345595B (de)	1978-09-25	Magnetkopftragarm
NL7414800A (nl)	1975-06-19	Magnetische omzetkop.
AT344423B (de)	1978-07-25	Magnetische einrichtung
IT1022571B (it)	1978-04-20	Testina magnetica di cancellazione
ATA648374A (de)	1977-07-15	Flussmittel
AT354761B (de)	1979-01-25	Magnetband
NL168982C (nl)	1982-05-17	Slijtage-arme magneetkop.
AT336912B (de)	1977-06-10	Mehrkanalmagnetkopf
IT1030640B (it)	1979-04-10	Testina magnetica di cancellazione
IT1024353B (it)	1978-06-20	Testata di chiusura
BE812019A (fr)	1974-09-09	Bobines
SU493793A1 (ru)	1975-11-28	Магнитна головка
AT350288B (de)	1979-05-25	Magnetkopf
SU470856A1 (ru)	1975-05-15	Блок магнитных головок
SU472317A1 (ru)	1975-05-30	Магнитный феррометр
SU514331A1 (ru)	1976-05-15	Магнитна головка