ES8202446A1 - Dispositivo de cabeza magnetica de registro y de lectura de datos - Google Patents
Dispositivo de cabeza magnetica de registro y de lectura de datosInfo
- Publication number
- ES8202446A1 ES8202446A1 ES500235A ES500235A ES8202446A1 ES 8202446 A1 ES8202446 A1 ES 8202446A1 ES 500235 A ES500235 A ES 500235A ES 500235 A ES500235 A ES 500235A ES 8202446 A1 ES8202446 A1 ES 8202446A1
- Authority
- ES
- Spain
- Prior art keywords
- writing
- width
- magnetic head
- magnetic
- variable track
- 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
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
- G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
- G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
DISPOSITIVO DE CABEZA MAGNETICA DE REGISTRO Y DE LECTURA DE DATOS. DISPONE DE UN ENTREHIERRO UNICO (16) DE GARAN LONGITUD TRANSVERSAL, QUE SOLO LEE UNA ANCHURA REDUCIDA DE LA PISTA REGISTRADA POR SIMPLE CONMUTACION DE LOS ARROLLAMIENTOS RESPECTIVOS DE REGISTRO (2) Y DE LECTURA (3); DICHO ENTREHIERRO COOPERA CON EL SOPORTE MOVIL (8), ESTANDO FORMADO POR DOS CARAS POLARES DE CONTORNO RECTANGULAR, DELIMITANDO LA MAYOR LA ANCHURA REGISTRADA Y LA MENOR LA ANCHURA LEIDA. COMPRENDE, ADEMAS UN CIRCUITO MAGNETICO (1) EN FORMA DE ANILLO CUYA SUPERFICIE TRANSVERSAL TIENE DIMENSIONES DIFERENTES (L1, L2) POR LA ESTRUCTURA DEL ENTREHIERRO.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8005418A FR2478357A1 (fr) | 1980-03-11 | 1980-03-11 | Tete magnetique d'enregistrement et de lecture de donnees magnetiques, a largeur de piste variable |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8202446A1 true ES8202446A1 (es) | 1982-01-16 |
ES500235A0 ES500235A0 (es) | 1982-01-16 |
Family
ID=9239539
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES500235A Granted ES500235A0 (es) | 1980-03-11 | 1981-03-10 | Dispositivo de cabeza magnetica de registro y de lectura de datos |
ES502314A Expired ES8206074A1 (es) | 1980-03-11 | 1981-05-19 | Procedimiento de fabricacion de cabezas magneticas de regis-tro y de lectura de datos |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES502314A Expired ES8206074A1 (es) | 1980-03-11 | 1981-05-19 | Procedimiento de fabricacion de cabezas magneticas de regis-tro y de lectura de datos |
Country Status (6)
Country | Link |
---|---|
US (1) | US4405959A (es) |
EP (1) | EP0035943B1 (es) |
JP (1) | JPS56134310A (es) |
DE (1) | DE3164649D1 (es) |
ES (2) | ES500235A0 (es) |
FR (1) | FR2478357A1 (es) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57189325A (en) * | 1981-05-18 | 1982-11-20 | Toshiba Corp | Composite magnetic head |
DE3376903D1 (en) * | 1982-10-01 | 1988-07-07 | Mitsubishi Electric Corp | Disc drive for flexible discs with different track widths |
NL8302093A (nl) * | 1983-06-13 | 1985-01-02 | Philips Nv | Magnetische overdrachtskop voor het schrijven van informatie op hoogcoercitieve registratie media. |
US4819107A (en) * | 1984-08-29 | 1989-04-04 | Irwin Magnetic Systems, Inc. | Magnetic transducer head structure |
KR860002082A (ko) * | 1984-08-29 | 1986-03-26 | 프랑시스 글로리 | 자기 변환기 헤드 구조물 |
JPH0831204B2 (ja) * | 1985-10-18 | 1996-03-27 | 富士通株式会社 | 薄膜磁気ヘツド |
US4821126A (en) * | 1985-10-22 | 1989-04-11 | Fuji Photo Film Co., Ltd. | Magnetic recording method involving core pieces of different thickness |
US4849841A (en) * | 1987-04-10 | 1989-07-18 | Irwin Magnetic Systems, Inc. | Transducer head core structure with recessed magnetic closures |
US4883950A (en) * | 1987-05-23 | 1989-11-28 | The Furukawa Electric Co., Ltd. | Composite magnetic and optical head |
KR0126289B1 (ko) * | 1988-02-09 | 1997-12-26 | 이우에 사또시 | 자기 헤드 및 그 제조 방법 |
JP2600841B2 (ja) * | 1988-09-02 | 1997-04-16 | 三菱電機株式会社 | 磁気ヘッド |
US5706145A (en) * | 1994-08-25 | 1998-01-06 | Hindman; Carl L. | Apparatus and methods for audio tape indexing with data signals recorded in the guard band |
US5734533A (en) * | 1996-05-15 | 1998-03-31 | Read-Rite Corporation | Dual gap magnetic head and method of making the same |
JPH10247305A (ja) * | 1997-03-03 | 1998-09-14 | Sanyo Electric Co Ltd | 複合型薄膜磁気ヘッドの製造方法 |
GB0420443D0 (en) * | 2004-09-14 | 2004-10-20 | Ncr Int Inc | A card reader |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2947592A (en) * | 1955-08-25 | 1960-08-02 | Sperry Rand Corp | High frequency magnetic transducers |
GB831492A (en) * | 1955-09-06 | 1960-03-30 | Ibm | Improvements in magnetic transducers |
GB900652A (en) * | 1957-11-06 | 1962-07-11 | Emi Ltd | Improvements in or relating to magnetic transducing heads |
US3209078A (en) * | 1960-12-20 | 1965-09-28 | Siemens Ag | Magnetic head equipped with a hall generator |
DE1167053B (de) * | 1961-10-17 | 1964-04-02 | Telefunken Patent | Loeschkopf zum getrennten Loeschen von zwei Tonspuren bei Zweispurbetrieb und zum Loeschen von Vollspuraufzeichnungen |
US3353168A (en) * | 1964-04-09 | 1967-11-14 | Potter Instrument Co Inc | Wide-record narrow-read magnetic head |
NL7210322A (es) * | 1972-07-26 | 1974-01-29 | ||
JPS5838843B2 (ja) * | 1973-11-20 | 1983-08-25 | ティーディーケイ株式会社 | 磁気記録再生方式 |
US4085430A (en) * | 1974-01-24 | 1978-04-18 | U.S. Philips Corporation | Thin film magnetic head with a gap formed between a loop shaped core part and a bridging core part |
JPS51147312A (en) * | 1975-06-13 | 1976-12-17 | Canon Inc | Magnetic head |
JPS5235616A (en) * | 1975-09-16 | 1977-03-18 | Alps Nootoronikusu Kk | Magnetic head |
GB1500593A (en) * | 1976-10-19 | 1978-02-08 | Data Recording Instr Co | Magnetic transducing heads |
JPS545417A (en) * | 1977-06-14 | 1979-01-16 | Tdk Corp | Magnetic head |
JPS5842579A (ja) * | 1981-09-09 | 1983-03-12 | 株式会社日立製作所 | 速度帰還形油圧エレベ−タ装置 |
-
1980
- 1980-03-11 FR FR8005418A patent/FR2478357A1/fr active Granted
-
1981
- 1981-03-06 DE DE8181400351T patent/DE3164649D1/de not_active Expired
- 1981-03-06 EP EP81400351A patent/EP0035943B1/fr not_active Expired
- 1981-03-09 US US06/242,157 patent/US4405959A/en not_active Expired - Lifetime
- 1981-03-10 ES ES500235A patent/ES500235A0/es active Granted
- 1981-03-11 JP JP3513381A patent/JPS56134310A/ja active Pending
- 1981-05-19 ES ES502314A patent/ES8206074A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4405959A (en) | 1983-09-20 |
EP0035943A1 (fr) | 1981-09-16 |
ES502314A0 (es) | 1982-07-16 |
DE3164649D1 (en) | 1984-08-16 |
FR2478357A1 (fr) | 1981-09-18 |
ES8206074A1 (es) | 1982-07-16 |
ES500235A0 (es) | 1982-01-16 |
JPS56134310A (en) | 1981-10-21 |
FR2478357B1 (es) | 1984-04-06 |
EP0035943B1 (fr) | 1984-07-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19971001 |