EP0870270A1 - A device for releasably securing a read and/or write head - Google Patents
A device for releasably securing a read and/or write headInfo
- Publication number
- EP0870270A1 EP0870270A1 EP95936686A EP95936686A EP0870270A1 EP 0870270 A1 EP0870270 A1 EP 0870270A1 EP 95936686 A EP95936686 A EP 95936686A EP 95936686 A EP95936686 A EP 95936686A EP 0870270 A1 EP0870270 A1 EP 0870270A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carriage
- head
- ticket
- frame
- card
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
- G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
- G11B21/26—Means for interchange or replacement of head or head element
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/50—Interchangeable mountings, e.g. for replacement of head without readjustment
Definitions
- the invention relates to a device for releasably securing a read and/or write head to other apparatus.
- the invention relates particularly, though not exclusively, to magnetic read and write heads associated with card or ticket transport apparatus in a card or ticket reading system.
- ticket or card reading systems for example in access control systems having many parallel channels in particular
- the nature of ticket or card reading systems is such that during busy periods it is essential that channels are not taken out of service for maintenance or repair. This results in queues developing which may give rise to safety problems in the event of an evacuation, or security problems associated with ticket theft or pick-pockets.
- repair personnel may be unwilling to spend long periods of time in areas such as subway turnstiles because of the threat of assault.
- read and/or write heads In card or ticket reading systems, read and/or write heads (generally optical or magnetic) are usually attached to a card or ticket transport apparatus adjacent a train of rollers, wheels or belts which guide and drive the card or ticket through the apparatus and past the heads in use.
- magnetic head In such systems using magnetic coding, it is important that the magnetic head can be urged into contact with the card or ticket whilst it moves past It is important to be able to set the force urging the head into contact with the ticket accurately to the minimum required to give reliable reading, thereby minimizing factional wear of the head and prolong its useful life.
- a further requirement of card or ticket reading systems is to limit movement of the read or write head in the direction of ticket or card transport.
- the present invention provides a device for releasably securing a read and/or write head to a card or ticket transport system, the device comprising a frame attachable to the system, a carriage for the head, and mounting means for mounting the carriage on the frame, at least one of the carriage and the frame being resilient, the mounting means comprising a pair of rolling element bearings being loaded axially by the restoring force of the resilient frame and/or carriage when the carriage is mounted on the frame, the carriage being moveable in a direction substantially normal to a major surface of any card or ticket in said card or ticket transport system in use.
- This arrangement can provide a minimum and consistent resistance to movement perpendicular to the direction of ticket or card transport to ensure that additional frictional force components do not result in accelerated head wear.
- Manual setting of the bearing load can be eliminated using this arrangement. Such manual load setting is a time consuming task which requires a technician with considerable practical experience.
- the carriage and the frame are preferably a snap-fit. This can enable devices to be replaced easily and quickly for maintenance or repair without the need for hand tools or a particularly skilled technician working on the ticket transport equipment.
- the device preferably further comprises a magnetic read or write head, a resilient housing for the head and further mounting means for mounting the housing on the carriage, the said head being pivotable about at least one axis substantially parallel to the said direction of transport.
- This can enable the reading of and/or writing to tickets or cards having a wide range of thicknesses or to enable the magnetic head to move in a direction substantially normal to a major surface of the card or ticket to cope with warped or creased cards or tickets or uneven surfaces whilst maintaining low friction movement and the advantages of quick and easy changing of a device for maintenance or repair or replacement.
- the further mounting means preferably comprises a pair of rolling element bearings being loaded axially when the housing is mounted on the carriage.
- the housing and further mounting means are preferably a snap-fit
- the device advantageously includes biasing means being arranged such that the carriage and/or magnetic head is biased towards any card or ticket present in the transport system in operation. This can result in more reproducible reading and writing to warped or creased cards or tickets or to uneven surfaces.
- the biasing means can conveniently comprises a resilient member provided between the carriage and the frame.
- the biasing means is preferably constituted by a spring.
- the carriage and/or head movement is limited by the mounting means in the plane of the direction of transport of the card.
- the carriage is preferably substantially rigid whilst the frame is resilient
- Figure 1 shows a front and an end elevation of a device according to the invention
- Figure 2 shows a front and an end elevation of the magnetic head and housing portion of the device of Figure 1
- Figure 3 shows a front elevation of the carriage portion of the device of Figure 1
- Figure 4 shows a plan view of the carriage of Figure 3 without the mounting means
- Figure 5 shows an oblique view of the carriage of Figure 3.
- the housing 12 and the magnetic read head 3 are shown in greater detail in Figure 2.
- the housing has been designed to be resilient and a snap-fit over the cylindrical outer race of the bearing such that during snap fitting the correct axial loading of the bearing is automatically obtained through the restoring force of the deforming housing.
- Figure 4 shows a view from below of the carriage of Figure 3 with the rolling element bearings 4, 5, 8 and 9 removed.
- the rolling element bearings are a push fit onto the pins 20 attached to the carriage.
- Each pin is provided with a shoulder 21 which engages with the inner races of the corresponding bearing.
- the head and housing assembly can thus be easily removed for replacement without the need for tools of any kind.
- the arrangement also eliminates the need for a skilled technician to set the loading force of the rolling element bearings using for example a screw thread.
- the device of Figure 1 further includes biasing means 11 being arranged such that the carriage and magnetic head is biased towards any card or ticket present in the transport system in operation.
- this biasing means comprises a compression spring situated between the frame and the carriage.
- biasing means such as a weight (the magnetic head plus the housing could be used as at least part of this weight if the axes 6 and 7 are not in vertical alignment), or a resilient member such as a rubber rod or a leaf or helical spring placed between the carriage and another body may be used alternatively or in addition.
- the oblique view of the carriage 2 shown in Figure 5 illustrates the presence of a notch 14 which is used to locate one end of the spring or resilient member in use.
- the housing 12 need not substantially surround the magnetic head, the housing carries the head and enables the head to be easily mounted onto the carriage.
- Magnetic heads each in a housing would typically be kept as integral replaceable units for use as spare parts.
- Magnetic read heads and magnetic write heads may be mounted in the system using a device according to the invention. Heads which do not use magnetism to read or write may be used as an alternative falling within the scope of the present invention.
- optical or electronic heads may be provided if desired.
- the present invention can provide accurately controllable limitation of the movement of the head in a plane substantially parallel to the direction of movement of the card or ticket, whilst simultaneously providing a minimum and consistent resistance to movement orthogonal to the direction of ticket or card transport so that additional frictional force components do not result in accelerated head wear.
- the device is simple to manufacture.
- the axial loading is designed to be achieved by the restoring force of the resilient components.
- the carriage unit and/or the housing and head unit can be replaced very easily and quickly for maintenance or repair without hand tools or a skilled technician working on the ticket transport equipment.
- such devices are usually mounted on pivotable bodies which are releasably secured to the ticket reading system such that they can be swung out of the line of the card or ticket transport for access during maintenance.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
- Magnetic Heads (AREA)
- Adornments (AREA)
- Conveying Record Carriers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9501685A GB2297417A (en) | 1995-01-28 | 1995-01-28 | A device for removably attaching a read or write head |
GB9501685 | 1995-01-28 | ||
PCT/GB1995/002671 WO1996023273A1 (en) | 1995-01-28 | 1995-11-15 | A device for releasably securing a read and/or write head |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0870270A1 true EP0870270A1 (en) | 1998-10-14 |
Family
ID=10768729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95936686A Withdrawn EP0870270A1 (en) | 1995-01-28 | 1995-11-15 | A device for releasably securing a read and/or write head |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0870270A1 (en) |
KR (1) | KR19980701724A (en) |
AU (1) | AU697724B2 (en) |
CA (1) | CA2211559A1 (en) |
GB (2) | GB2297417A (en) |
TR (1) | TR199600059A2 (en) |
WO (1) | WO1996023273A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3664644B2 (en) * | 2000-10-06 | 2005-06-29 | 日立オムロンターミナルソリューションズ株式会社 | Magnetic head support structure and magnetic card reader |
FR2875634B1 (en) * | 2004-09-23 | 2009-02-20 | Sagem | DEVICE FOR HOLDING A MAGNETIC READING HEAD |
JP5199181B2 (en) * | 2009-05-22 | 2013-05-15 | 日立オムロンターミナルソリューションズ株式会社 | Magnetic head support device and card processing device |
ES2725854T3 (en) | 2010-12-07 | 2019-09-27 | Ingenico Group | Clamping device of a magnetic reading head |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB850028A (en) * | 1958-01-02 | 1960-09-28 | Tdk Electronics Co Ltd | Improvements in or relating to apparatus for resiliently supporting a head of a machine for magnetically recording sound or for reproducing magnetically recorded sound |
FR2522430B1 (en) * | 1982-02-26 | 1987-11-20 | Europ Composants Electron | MAGNETIC READ AND / OR WRITE DEVICE |
FR2609829A1 (en) * | 1987-01-16 | 1988-07-22 | Bull Sa | MAGNETIC HEAD FOR READING OR WRITING MAGNETIC TRACK CARDS |
AU3323493A (en) * | 1991-12-30 | 1993-07-28 | Verifone, Inc. | Card reader apparatus |
-
1995
- 1995-01-28 GB GB9501685A patent/GB2297417A/en not_active Withdrawn
- 1995-11-15 EP EP95936686A patent/EP0870270A1/en not_active Withdrawn
- 1995-11-15 AU AU38531/95A patent/AU697724B2/en not_active Ceased
- 1995-11-15 GB GB9523326A patent/GB2297418B/en not_active Expired - Fee Related
- 1995-11-15 CA CA002211559A patent/CA2211559A1/en not_active Abandoned
- 1995-11-15 WO PCT/GB1995/002671 patent/WO1996023273A1/en active Search and Examination
- 1995-11-15 KR KR1019970705120A patent/KR19980701724A/en not_active Application Discontinuation
-
1996
- 1996-01-24 TR TR96/00059A patent/TR199600059A2/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9623273A1 * |
Also Published As
Publication number | Publication date |
---|---|
GB2297417A (en) | 1996-07-31 |
GB2297418B (en) | 1997-04-09 |
CA2211559A1 (en) | 1996-08-01 |
KR19980701724A (en) | 1998-06-25 |
GB9501685D0 (en) | 1995-03-15 |
GB2297418A (en) | 1996-07-31 |
GB9523326D0 (en) | 1996-01-17 |
AU3853195A (en) | 1996-08-14 |
AU697724B2 (en) | 1998-10-15 |
WO1996023273A1 (en) | 1996-08-01 |
TR199600059A2 (en) | 1996-08-21 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19971024 |
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AK | Designated contracting states |
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GRAG | Despatch of communication of intention to grant |
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17Q | First examination report despatched |
Effective date: 19981109 |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19990622 |