公开(公告)号：US3881190A

公开(公告)日：1975-04-29

申请号：US39921873

申请日：1973-09-20

Applicant: IBM

Inventor： BROCK GEORGE W ,  SHELLEDY FRANK B ,  SMITH SIDNEY H ,  WILLS ARTHUR B

IPC: G11B5/33 ,  G11B5/39 ,  G11B5/16 ,  G11B5/22

CPC classification number: G11B5/39 ,  G11B5/332

Abstract: A magnetoresistive (MR) head with an unusually desirable spatial resolution includes a shield on each side of the MR element. Information is carried on a magnetizable medium as recorded magnetic areas. The shields are spaced apart by a distance on the order of and less than the shortest recorded wavelength for which the head is meant to be used. The MR element and the shields have their edges nearest the medium in a common plane perpendicular to the vertical component of a signal from the recorded area. An additional shunt bias layer may be provided immediately adjacent and coextensive the MR element, and the head may serve one or many tracks.

Abstract translation: 具有异常期望的空间分辨率的磁阻（MR）头包括在MR元件的每一侧上的屏蔽。 信息在可磁化介质上作为记录磁区进行。 屏蔽物隔开一定距离并且小于头部意图使用的最短记录波长的距离。 MR元件和屏蔽件在垂直于来自记录区域的信号的垂直分量的公共平面中具有最靠近介质的边缘。 附加的分流偏置层可以紧邻MR元件并且共同延伸，并且头可以用于一个或多个轨道。

公开(公告)号：US3614830A

公开(公告)日：1971-10-26

申请号：US3614830D

申请日：1969-02-28

Applicant: IBM

Inventor： BATE GEOFFREY ,  BROCK GEORGE W

IPC: G11B5/11 ,  G11B5/147 ,  H01F27/24 ,  H01F41/02 ,  H01F7/06

CPC classification number: H01F41/0233 ,  G11B5/147 ,  Y10T29/49048 ,  Y10T29/49055 ,  Y10T29/49078

Abstract: A LAMINATED STRUCTURE, INCLUDING LAMINA OF METALLIC MAGNETICALLY PERMEABLE MATERIAL, CONSTRUCTED WITH EACH LAMINA SEPARATED FROM EACH NEXT ADJOINING LAMINA BY A THIN LAYER OF ELECTRICALLY NON-CONDUCTIVE MATERIAL, WITH THE EXCEPTION THAT EACH LAMINA IS JOINED AND INTERCONNECTED IN A RANDOM PATTERN THROUGH THE NON-CONDUCTIVE LAYER TO EACH ADJACENT LAMINA. THE INTERCONNECTIONS BETWEEN EACH PAIR OF LAMINAE COVER ABOUT 10%, OR LESS, OF EACH LAMINA''S SURFACE AREA. LAMINATED STRUCTURES OF THIS TYPE ARE PRODUCED BY PROVIDING A THIN, ELECTRICALLY NONCONDUCTIVE COATING UPON THE SURFACE OF METALLIC LAMINA, STACKING A PLURALITY OF COATED LAMINAE, INLCUDING MAGNETICALLY PERMEABLE LAMINA, IN REGISTERED CONTACTING RELATIONSHIP, AND THEN HEATING THE STACKED LAMINAE AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO SIMULTANEOUSLY ANNEAL THE MAGNETICALLY PERMEABLE MATERIAL AND CAUSE EACH LAMINA TO BE DIFFSION BONDED THROUGH THE NON-CONDUCTIVE LAYER TO EACH ADJACENT LAMINA IN A RANDOM PATTERN COVERING ABOUT 10%, OR LESS, OF EACH LAMINA''S SURFACE AREA.

公开(公告)号：US3353166A

公开(公告)日：1967-11-14

申请号：US31839563

申请日：1963-10-23

Applicant: IBM

Inventor： BROCK GEORGE W

IPC: G11B5/725

CPC classification number: G11B5/725

公开(公告)号：CA1061455A

公开(公告)日：1979-08-28

申请号：CA300753

申请日：1978-04-10

Applicant: IBM

Inventor： BROCK GEORGE W ,  KOLLAR ERNEST P ,  NETTLES MICHAEL L

IPC: G11B5/48 ,  G11B15/26 ,  G11B15/60

Abstract: DYNAMIC SKEW CORRECTION FOR ROTATING HEAD MAGNETIC RECORDER Parallelism between the track on magnetic tape and the path of the rotating head is dynamically adjusted and maintained by adjusting one or both of the entry or exit guides guiding the tape as it helically wraps a mandrel. The mandrel has two halves that flank the rotating head so that as the tape wraps the mandrel, the rotating head traverses the tape at an oblique angle. Skew error is represented by a lack of parallelism between the track on the tape and the path of the rotating head across the tape. The skew error may be corrected by laterally shifting either the entry or exit tape edge guide without distorting the track over a limited lateral range of movement by the guides. The entry and exit edge guides are continuous-compliant air-bearing guides. Similarly, the mandrel that supports the tape adjacent the rotating head is also air bearing.

公开(公告)号：CA1030653A

公开(公告)日：1978-05-02

申请号：CA182967

申请日：1973-10-09

Applicant: IBM

Inventor： BROCK GEORGE W ,  SHELLEDY FRANK B

IPC: G01R33/09 ,  G11B5/03 ,  G11B5/39 ,  H01F1/00

Abstract: A magnetic transducer exhibiting the magnetoresistive (MR) effect includes at least two thin film layers. An MR film in electrical control with a higher resistivity layer is magnetically biased by a portion of the MR sense current shunted through the nonmagnetic layer.

公开(公告)号：DE2529017A1

公开(公告)日：1976-01-22

申请号：DE2529017

申请日：1975-06-28

Applicant: IBM

Inventor： BROCK GEORGE W ,  HAHN JUN FREDERICK W

IPC: G11B5/53 ,  G11B5/52 ,  G11B15/64 ,  G11B5/22 ,  H04N5/78

Abstract: A rotating head magnetic tape transport wherein a helical wrap of flexible magnetic tape is formed about a stationary tubular mandrel and a rotatable headwheel which carries a slotted head of generally spherical flying contour.

公开(公告)号：CA1043012A

公开(公告)日：1978-11-21

申请号：CA227643

申请日：1975-05-23

Applicant: IBM

Inventor： ARTER NELSON K ,  BROCK GEORGE W ,  JACKSON HOWARD C ,  LEGGATE JAMES W

IPC: H04N5/7826 ,  B65H23/032 ,  G05D13/62 ,  G11B15/087 ,  G11B15/18 ,  G11B15/467 ,  G11B15/54 ,  G11B15/60 ,  G11B15/61 ,  G11B27/13 ,  G11B21/04 ,  G11B15/46

Abstract: TRANSVERSE TRACK LOCATION A track or stripe tape positioner for a helical scan or rotary head recorder uses digital techniques. The expected step size is preset into a counter. During the next phase, a calibration phase, the tape is stepped through a plurality of stripes whereat the present value is adjusted to measured values. In the third phase, the average step size is maintained subject to certain averaged changes thus providing a high degree of noise rejection to ensure reliable incremental stepping of a record tape through the recorder.

公开(公告)号：FR2279190A1

公开(公告)日：1976-02-13

申请号：FR7518147

申请日：1975-06-03

Applicant: IBM

Inventor： BROCK GEORGE W ,  KOLLAR ERNEST P ,  NETTLES MICHAEL L

IPC: H04N5/7826 ,  G11B15/467 ,  G11B15/60 ,  G11B15/61 ,  G11B15/64 ,  H04N5/783 ,  G11B5/43

公开(公告)号：FR2277400A1

公开(公告)日：1976-01-30

申请号：FR7518140

申请日：1975-06-03

Applicant: IBM

Inventor： BROCK GEORGE W ,  HAHN FREDERICK W JR

IPC: G11B5/53 ,  G11B5/52 ,  G11B15/64 ,  G11B5/12

Abstract: A rotating head magnetic tape transport wherein a helical wrap of flexible magnetic tape is formed about a stationary tubular mandrel and a rotatable headwheel which carries a slotted head of generally spherical flying contour.

公开(公告)号：CA1061457A

公开(公告)日：1979-08-28

申请号：CA227642

申请日：1975-05-23

Applicant: IBM

Inventor： BROCK GEORGE W ,  KOLLAR ERNEST P ,  NETTLES MICHAEL L

IPC: H04N5/7826 ,  G11B15/467 ,  G11B15/60 ,  G11B15/61 ,  G11B15/64 ,  H04N5/783 ,  G11B15/26 ,  G11B5/48

Abstract: DYNAMIC SKEW CORRECTION FOR ROTATING HEAD MAGNETIC RECORDER Parallelism between the track on magnetic tape and the path of the rotating head is dynamically adjusted and maintained by adjusting one or both of the entry or exit guides guiding the tape as it helically wraps a mandrel. The mandrel has two halves that flank the rotating head so that as the tape wraps the mandrel, the rotating head traverses the tape at an oblique angle. Skew error is represented by a lack of parallelism between the track on the tape and the path of the rotating head across the tape. The skew error may be corrected by laterally shifting either the entry or exit tape edge guide without distorting the track over a limited lateral range of movement by the guides. The entry and exit edge guides are continuous-compliant air-bearing guides. Similarly, the mandrel that supports the tape adjacent the rotating head is also air bearing. CROSS REFERENCE TO RELATED APPLICATION Detection of head to track alignment to provide a skew error signal to the present skew error correction invention can be accomplished a number of ways, but is preferably accomplished as described in the commonly assigned U.S. Patent 3,845,500 which issued, filed October 29, 1974, entitled "Head to Track Alignment in a Rotating Head Magnetic Tape Unit" by G.A. Hart.