公开(公告)号：US3921340A

公开(公告)日：1975-11-25

申请号：US45013974

申请日：1974-03-11

Applicant: IBM

Inventor： JOHNSON LARRY A ,  ROBINSON NEIL L ,  STRANG RICHARD H ,  VAIR GARY G

IPC: G11B5/23 ,  G11B5/187 ,  G11B5/39 ,  B24B49/10

CPC classification number: G11B5/39

Abstract: A head is moved toward and rotated against an abrasive while its resistance is monitored by a four-lead bridge. Two leads from the head are connected to two slip rings, and each slip ring has two pairs of brushes, each wire from the bridge going to a different brush pair. Head movement toward the abrasive is terminated when a predetermined head resistance is detected by the bridge.

Abstract translation: 头部被移动并旋转抵靠研磨剂，同时其电阻由四引线桥监测。 来自头部的两根导线连接到两个滑环，每个滑环具有两对刷子，每根电线从桥接到不同的刷子对。 当通过桥梁检测到预定的头部电阻时，朝向磨料的头部移动终止。

公开(公告)号：CA1112358A

公开(公告)日：1981-11-10

申请号：CA297719

申请日：1978-02-24

Applicant: IBM

Inventor： LOSEE PAUL D ,  ROBINSON NEIL L

IPC: G11B5/127 ,  G11B5/187 ,  G11B5/23 ,  G11B5/265 ,  G11B5/12

Abstract: MASS PRODUCING MAGNETIC HEAD CORES WITH CANT ANGLES A method for batch fabricating magnetic heads with a desired cant angle in the transducing surface of the magnetic core. The cant angle reduces the "Minor Bit" phenomenon. The two parts of the core which require the cant angle are mounted on a fixture so that a grind wheel is simultaneously in contact with both parts. Materials are simultaneously subtracted (i.e., grind away) from both parts to create mirror images at the surfaces which adjoin the grind wheel. The surfaces are then cleaned and glassed to provide a core bar with intimate fit. The core bar is diced into individual cores and is lapped to size. The individual cores are then fitted into a slider assembly to form the magnetic head.

公开(公告)号：FR2410861A1

公开(公告)日：1979-06-29

申请号：FR7831283

申请日：1978-10-31

Applicant: IBM

Inventor： CHEATHAM SAMUEL D ,  ROBINSON NEIL L ,  SMATHERS EDMOND W

IPC: G11B5/127 ,  G11B5/23 ,  G11B5/22

Abstract: An AC magnetic erase head having improved AC erase characteristics, the magnetic head being formed of two half core elements of a magnetic material, preferably ferrite, defining an irregular edged or jagged-edged gap, and including a non-magnetic substance, preferably glass, within the gap. The magnetic head is preferably produced by thermally etching ferrite magnetic material forming the half core elements by means of relatively prolonged heat soak at an elevated temperature.

公开(公告)号：CA1119720A

公开(公告)日：1982-03-09

申请号：CA309374

申请日：1978-08-15

Applicant: IBM

Inventor： CHEATHAM SAMUEL D ,  ROBINSON NEIL L ,  SMATHERS EDMOND W

IPC: G11B5/127 ,  G11B5/23 ,  G11B5/25

Abstract: An AC magnetic erase head having improved AC erase characteristics, the magnetic head being formed of two half core of a magnetic material, preferably ferrite, defining an irregular edged or jagged-edged gap, and including a non-magnetic substance, preferably glass, within the gap. The magnetic head is preferably produced by thermally etching ferrite magnetic material forming the half core elements by means of relatively prolonged heat soak at an elevated temperature.

公开(公告)号：FR2392463A1

公开(公告)日：1978-12-22

申请号：FR7811799

申请日：1978-04-14

Applicant: IBM

Inventor： LOSEE PAUL D ,  ROBINSON NEIL L

IPC: G11B5/187 ,  G11B5/127 ,  G11B5/23 ,  G11B5/265 ,  G11B5/42

Abstract: A method for batch fabricating magnetic heads with a desired cant angle in the transducing surface of the magnetic core. The cant angle reduces the "Minor Bit" phenomenon. The two parts of the core which require the cant angle are mounted on a fixture so that a grind wheel is simultaneously in contact with both parts. Materials are simultaneously subtracted (i.e., grind away) from both parts to create mirror images at the surfaces which adjoin the grind wheel. The surfaces are then cleaned and glassed to provide a core bar with intimate fit. The core bar is diced into individual cores and is lapped to size. The individual cores are then fitted into a slider assembly to form the magnetic head.