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FR2616948A1 - Magnetic head for magnetic track - Google Patents

Magnetic head for magnetic track Download PDF

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Publication number
FR2616948A1
FR2616948A1 FR8708365A FR8708365A FR2616948A1 FR 2616948 A1 FR2616948 A1 FR 2616948A1 FR 8708365 A FR8708365 A FR 8708365A FR 8708365 A FR8708365 A FR 8708365A FR 2616948 A1 FR2616948 A1 FR 2616948A1
Authority
FR
France
Prior art keywords
magnetic
head
pads
support
tracks
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.)
Pending
Application number
FR8708365A
Other languages
French (fr)
Inventor
Jean-Claude Moisand
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.)
Cga Hbs
Original Assignee
Cga Hbs
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 Cga Hbs filed Critical Cga Hbs
Priority to FR8708365A priority Critical patent/FR2616948A1/en
Publication of FR2616948A1 publication Critical patent/FR2616948A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/01—Details
    • G06K7/015—Aligning or centering of the sensing device with respect to the record carrier
    • 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
    • G11B5/255—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 protection against wear

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

Magnetic head for magnetic track 5 arranged on any support 6, comprising a magnetic circuit 2 equipped with at least one electric coil former 3 and interrupted at its apex by at least one gap 4, characterised in that the head is equipped with two runners made from a material of high hardness, which are situated on either side of the head on the faces perpendicular to the gap, the said runners slightly overhanging the apex of the head and being intended to slide on either side of the magnetic track over sliding tracks 10, 11 situated on the said support 6.

Description

Tête magnétique pour piste magnétique
La présente invention concerne une tête magnétique pour piste magnétique disposée sur un support.Magnetic head for magnetic strip
The present invention relates to a magnetic head for a magnetic strip arranged on a support.

Lors du passage d'une tête magnétique sur une piste magnétique disposée sur un support quelconque, pour y enregistrer des informations ou pour y lire des informations préalablement enregistrées, la tete, ainsi que la piste s'usent. Dans le cas de têtes fonctionnant un très grand nombre de fois, par exemple pour la lecture de titres de transports à bande magnétique, genre ticket de métropolitain ou autres, il est alors nécessaire-au bout d'un certain temps de changer la tête. During the passage of a magnetic head on a magnetic track arranged on any support, to record information there or to read information previously recorded there, the head, as well as the track wear. In the case of heads operating a very large number of times, for example for reading magnetic strip transport tickets, such as a metropolitan ticket or others, it is then necessary-after a certain time to change the head.

La présente invention a pour but d'éviter l'usure d'une tête magnétique tout en assurant un niveau constant à l'écriture et à la lecture. The present invention aims to avoid wear of a magnetic head while ensuring a constant level of writing and reading.

L'invention a ainsi pour objet une tête magnétique pour piste magnétique disposée sur un support quelconque, comprenant un circuit magnétique, muni d'au moins un bobinage électrique et coupé à son sommet par au moins un entrefer, caractérisée en ce que la tête est munie de deux patins en matériau de grande dureté, situés de part et d'autre de la tête sur les faces perpendiculaires à l'entrefer, lesdits patins dépassant légèrement le sommet de la tête et étant destinés à glisser de part et d'autre de la piste magnétique sur des pistes de glissement situées sur ledit support. The subject of the invention is therefore a magnetic head for a magnetic strip arranged on any support, comprising a magnetic circuit, provided with at least one electric coil and cut at its top by at least one air gap, characterized in that the head is provided with two pads of very hard material, located on either side of the head on the faces perpendicular to the air gap, said pads slightly protruding from the top of the head and being intended to slide on either side of the magnetic strip on sliding tracks located on said support.

Afin d'assurer la constance de la distance entre le sommet de la tête magnétique et ladite piste magnétique, lesdites pistes de glissement sont réalisées en un matériau provoquant, par effet électrostatique, un effort d'attraction entre lesdites pistes et lesdits patins. In order to ensure consistency of the distance between the top of the magnetic head and said magnetic track, said sliding tracks are made of a material causing, by electrostatic effect, an attraction force between said tracks and said pads.

On va maintenant décrire un exemple de réalisation de l'invention en se référant au dessin annexé dans lequel
La figure 1 montre une tête magnétique selon l'invention en vue de face dans le cas particulier dtune tête à un bobinage et un seul entrefer. We will now describe an exemplary embodiment of the invention with reference to the accompanying drawing in which
FIG. 1 shows a magnetic head according to the invention in front view in the particular case of a head with a winding and a single air gap.

La figure 2 montre la tête magnétique de la figure 1 en vue de profil. Figure 2 shows the magnetic head of Figure 1 in side view.

En se référant aux figures 1 et 2, la tête magnétique selon l'invention comporte un boîtier 1 dans lequel est logée la tête proprement dite comprenant un circuit magnétique 2 muni d'un bobinage électrique 3. Le circuit magnétique 2 est coupé à son sommet par un entrefer 4. Dans les figures, la tête magnétique est représentée en position de travail, au-dessus d'une piste magnétique 5 disposée sur un support quelconque 6 placé sur une table guide 7. L'entrefer 4 est placé perpendiculairement à la piste magnétique 5. Referring to Figures 1 and 2, the magnetic head according to the invention comprises a housing 1 in which is housed the actual head comprising a magnetic circuit 2 provided with an electrical coil 3. The magnetic circuit 2 is cut at its top by an air gap 4. In the figures, the magnetic head is shown in the working position, above a magnetic track 5 arranged on any support 6 placed on a guide table 7. The air gap 4 is placed perpendicular to the magnetic strip 5.

Afin d'éviter l'usure de la tête magnétique, le circuit magnétique 2 ne frotte pas sur la piste 5 mais est muni de deux patins 8 et 9 respectivement situés de part et d'autre du circuit magnétique, sur ses faces latérales perpendiculaires à l'entrefer 4. In order to avoid wear of the magnetic head, the magnetic circuit 2 does not rub on the track 5 but is provided with two pads 8 and 9 respectively located on either side of the magnetic circuit, on its lateral faces perpendicular to air gap 4.

Ces patins 8 et 9 sont en matériau amorphe ou. cristallin de très grande dureté, ayant une granulométrie très fine et un poli de qualité miroir. Ils sont par exemple en rubis, verre amorphe, céramique, oxyde métallique etc.. La tête magnétique repose ainsi par ces patins 8 et 9 sur des pistes de glissement 10 et 11 disposées sur le support 6. La tête magnétique glisse ainsi sur ces pistes de part et d'autre de la la piste magnétique 5. These pads 8 and 9 are made of amorphous material or. crystal of very high hardness, having a very fine particle size and a mirror quality polish. They are for example made of ruby, amorphous glass, ceramic, metal oxide, etc. The magnetic head thus rests by these pads 8 and 9 on sliding tracks 10 and 11 arranged on the support 6. The magnetic head thus slides on these tracks on either side of the magnetic strip 5.

Ces pistes 10 et 11 facilitent le glissement de la tête magnétique et en outre elles permettent, en choisissant un matériau tel que des matières plastiques, de créer, entre les patins 8 et 9, et les pistes 10 et 11, un effort d'attraction électrostatique provenant de la création de charges électrostatiques lors du glissement desdits patins sur lesdites pistes, assurant ainsi la constance de la distance qui sépare la piste magnétique 5 de l'extrémité sommitale de la tête (circuit magnétique). These tracks 10 and 11 facilitate the sliding of the magnetic head and in addition they allow, by choosing a material such as plastics, to create, between the pads 8 and 9, and the tracks 10 and 11, an attraction force. electrostatic from the creation of electrostatic charges during the sliding of said pads on said tracks, thus ensuring the consistency of the distance which separates the magnetic track 5 from the top end of the head (magnetic circuit).

Les patins 8 et 9 dépassent l'extrémité sommitale de la tête d'une distance X choisie entre 10 et 50 microns et elle est réglée en fonction de l'utilisation. Les pistes 10 et Il peuvent être choisies en tout matériau se chargeant en charges électrostatiques lors du glissement des patins sur ces pistes. The pads 8 and 9 extend beyond the top end of the head by a distance X chosen between 10 and 50 microns and it is adjusted according to the use. The tracks 10 and II can be chosen from any material which charges with electrostatic charges when the pads slide on these tracks.

Bien entendu, l'invention s'applique également à une tête magnétique comportant plusieurs bobinages et entrefers.  Of course, the invention also applies to a magnetic head comprising several windings and air gaps.

Claims (3)

REVENDICATIONS 1/ Tête magnétique pour piste magnétique (5) disposée sur un support quelconque (6), comprenant un circuit magnétique (2) muni d'au moins un bobinage électrique (3) et coupé à son sommet par au moins un entrefer (4), caractérisée en ce que la tête est munie de deux patins (8, 9) en matériau de grande dureté, situés de part et d'autre de la tête sur les faces perpendiculaires à l'entrefer, lesdits patins dépassant légèrement le sommet de la tête et étant destinés à glisser de part et d'autre de la piste magnétique sur des pistes de glissements (10, 11) situées sur ledit support (6).1 / Magnetic head for magnetic track (5) arranged on any support (6), comprising a magnetic circuit (2) provided with at least one electric coil (3) and cut at its top by at least one air gap (4) , characterized in that the head is provided with two pads (8, 9) of very hard material, located on either side of the head on the faces perpendicular to the air gap, said pads slightly protruding from the top of the head and being intended to slide on either side of the magnetic track on sliding tracks (10, 11) located on said support (6). 2/ Tête magnétique selon la revendication 1, caractérisée en ce que ledit dépassement (x) des patins par rapport au sommet de la tête est de l'ordre de 10 à 50 microns. 2 / magnetic head according to claim 1, characterized in that said protrusion (x) of the pads relative to the top of the head is of the order of 10 to 50 microns. 3/ Tête magnétique selon l'une des revendications 1 ou 2 caractérisée en ce que lesdites pistes de glissement (10, 11) sont réalisées en un matériau se chargeant électrostatiquement lors du glissement desdits patins (8, 9) sur ces pistes. 3 / magnetic head according to one of claims 1 or 2 characterized in that said sliding tracks (10, 11) are made of a material being electrostatically charged during the sliding of said pads (8, 9) on these tracks.
FR8708365A 1987-06-16 1987-06-16 Magnetic head for magnetic track Pending FR2616948A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8708365A FR2616948A1 (en) 1987-06-16 1987-06-16 Magnetic head for magnetic track

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8708365A FR2616948A1 (en) 1987-06-16 1987-06-16 Magnetic head for magnetic track

Publications (1)

Publication Number Publication Date
FR2616948A1 true FR2616948A1 (en) 1988-12-23

Family

ID=9352088

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8708365A Pending FR2616948A1 (en) 1987-06-16 1987-06-16 Magnetic head for magnetic track

Country Status (1)

Country Link
FR (1) FR2616948A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422481A2 (en) * 1989-10-07 1991-04-17 Kommanditgesellschaft "CATTS Erkennungs- & Sicherheitstechnologie GmbH & Co.i.K. Electric code reader
CN102568123A (en) * 2011-12-29 2012-07-11 福建联迪商用设备有限公司 Magnetic head card swiping mechanism and card swiping machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB819349A (en) * 1955-06-28 1959-09-02 Int Computers & Tabulators Ltd Improvements in or relating to magnetic recording and/or reproducing apparatus
DE1087820B (en) * 1957-07-17 1960-08-25 Philips Nv Sheet-shaped magnetogram carrier and process for its manufacture
GB1290306A (en) * 1971-05-27 1972-09-27
US4225892A (en) * 1979-02-05 1980-09-30 International Business Machines Corporation Wear resistant magnetorestrictive head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB819349A (en) * 1955-06-28 1959-09-02 Int Computers & Tabulators Ltd Improvements in or relating to magnetic recording and/or reproducing apparatus
DE1087820B (en) * 1957-07-17 1960-08-25 Philips Nv Sheet-shaped magnetogram carrier and process for its manufacture
GB1290306A (en) * 1971-05-27 1972-09-27
US4225892A (en) * 1979-02-05 1980-09-30 International Business Machines Corporation Wear resistant magnetorestrictive head

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 28, no. 5, octobre 1985, pages 1857-1858, New York, US; "High sensitivity magnetoresistive sensor for decoding magnetic characters on checks" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422481A2 (en) * 1989-10-07 1991-04-17 Kommanditgesellschaft "CATTS Erkennungs- & Sicherheitstechnologie GmbH & Co.i.K. Electric code reader
EP0422481A3 (en) * 1989-10-07 1991-07-31 Kg Catts Gesellschaft Fuer Erkennungs- & Sicherheitstechnologie Mbh & Co. Electric code reader
CN102568123A (en) * 2011-12-29 2012-07-11 福建联迪商用设备有限公司 Magnetic head card swiping mechanism and card swiping machine
CN102568123B (en) * 2011-12-29 2015-05-13 福建联迪商用设备有限公司 Magnetic head card swiping mechanism and card swiping machine

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