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公开(公告)号：US3653061A
公开(公告)日：1972-03-28
申请号：US3653061D
申请日：1970-07-20
Applicant: IBM
Inventor： FRAUENFELDER LEWIS S , MCDOWELL JUDSON A
Abstract: An electrical circuit is adapted to receive a plurality of data signals having time coincidence relationship, and is constructed and arranged to produce, as an output, a plurality of similar data signals arranged out of time coincidence in a predetermined manner in accordance with the gap scatter pattern of an associated multiple gap magnetic transducer; the electrical circuit including a plurality of individual circuits, each of which includes a commutating gate, a monostable device having a timing interval which is shorter than the shortest period between transition of the data signal, and a bistable device connected to the output of the monostable device and responsive only to the trailing edge of its output pulse, the output of the bistable device being connected to control the commutating gate and also constituting a time delayed output data signal.
Abstract translation: 电路适于接收具有时间一致关系的多个数据信号，并且被构造和布置成根据间隙散射以预定的方式产生出时间重合布置的多个类似数据信号作为输出 相关联的多间隙磁换能器的图案; 所述电路包括多个独立电路，每个电路包括换向栅极，具有比数据信号转换之间的最短周期短的定时间隔的单稳态器件和连接到单稳态输出端的双稳态器件 器件，并且仅响应其输出脉冲的后沿，双稳态器件的输出被连接以控制换向栅极并且还构成时间延迟的输出数据信号。
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公开(公告)号：JP2001052447A
公开(公告)日：2001-02-23
申请号：JP2000204025
申请日：2000-07-05
Applicant: IBM
Inventor： JAQUETTE GLEN ALAN , KULAKOWSKI JOHN E , MCDOWELL JUDSON A , MEANS RODNEY J
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: PROBLEM TO BE SOLVED: To maximize the data storage capacity of a data storage disk while maintaining the relatively linear addressability of an addressable data storage area on the data storage disk. SOLUTION: The data storage disk is provided with an addressable track independent of the length of disk or helical track rotation and provided with the non-integer pieces of addressable tracks and sectors. Plural rotation bands provided in a radial direction are provided with the fixed number of rotations and the increasing number of the addressable tracks in a band on the outer side of the radial direction of the band. The respective bands are divided into plural rotation groups and the respective groups are provided with the fixed number of the rotations. The respective groups of the band are provided with the same number of the addressable tracks. The respective rotation groups start at an anchor sector 115 fixed at a reference circumferential direction position 100 on the disk and the other sectors of the entire groups are positioned in the circumferential direction of the anchor sector.
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Patent Agency Ranking
公开(公告)号：BR9300106A
公开(公告)日：1993-08-10
申请号：BR9300106
申请日：1993-01-11
Applicant: IBM
Inventor： JAQUETTE GLENN A , KULAKOWSKI JOHN E , MCDOWELL JUDSON A , MEANS RODNEY J
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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公开(公告)号：CA2081179C
公开(公告)日：1996-12-17
申请号：CA2081179
申请日：1992-10-22
Applicant: IBM
Inventor： JAQUETTE GLEN A , KULAKOWSKI JOHN E , MCDOWELL JUDSON A , MEANS RODNEY J
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: Data-storing disks, preferably each disk having a single spiral track, have addressable tracks that are independent of the length of disk or spiral track revolutions. Each revolution may contain a non-integral number of addressable tracks and sectors. An optical disk is used to describe the invention. The circumferential location of the tracks and sectors precess circumferentially. A plurality of radially disposed revolution bands each contain a fixed number of the revolutions an increasing number of the addressable tracks in the radially outer more ones of the bands. It is preferred that the number of bands be 2n, where n is an integer. Each band is divided into a plurality of revolution groups, each group having a fixed number of revolutions. Each group in a band has a like number of the addressable tracks. A so-called anchor sector has one end anchored to a reference circumferential position on the disk. Each revolution group begins with an anchor sector, all other sectors in the group are positioned circumferentially with respect to the anchor sector. Addressable track seeking, alternate embodiments and fabrication of a disk are described.
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公开(公告)号：CA2081179A1
公开(公告)日：1993-08-05
申请号：CA2081179
申请日：1992-10-22
Applicant: IBM
Inventor： JAQUETTE GLEN A , KULAKOWSKI JOHN E , MCDOWELL JUDSON A , MEANS RODNEY J
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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公开(公告)号：CA1235481A
公开(公告)日：1988-04-19
申请号：CA498311
申请日：1985-12-20
Applicant: IBM
Inventor： BLANCO ALFRED W , MCDOWELL JUDSON A , YEARY DAVID A
Abstract: With high density reel-to-reel tape drives, slight perturbtions in the tape path can cause instantaneous speed variations in the tape which can alter the recording density of data on the tape over a very short interval. This condition can be detected by measuring changes in recording intervals on a plurality of data tracks. Whenever all of the tracks indicate an unacceptable change in the recording interval an unacceptable speed variation has been encountered.
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公开(公告)号：FR2360956A1
公开(公告)日：1978-03-03
申请号：FR7718261
申请日：1977-06-09
Applicant: IBM
Inventor： DEVORE ERNEST W , MCDOWELL JUDSON A
Abstract: Each data record portion on a record member includes preamble signals for synchronizing recording apparatus with respect to data signals recorded in juxtaposition to the preamble signals. A plurality of beginning of data indicators are interleaved in the synchronizing signals for providing a plurality of independent but coacting beginning of data location pointers. Enhanced apparatus includes means responsive to any one of the location pointers to ensure a reliable start of data indication.
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