公开(公告)号：EP0110680A3

公开(公告)日：1985-12-18

申请号：EP83307180

申请日：1983-11-24

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Ochi, Atsuo ,  Hashima, Akio ,  Tomita, Masao

IPC: G11B05/52 ,  G11B05/008 ,  G11B05/14 ,  G11B05/12 ,  G11B05/02

CPC classification number: G11B15/14

Abstract: A magnetic recording/reproducing apparatus comprises a ' rotor drum (11) mounting thereon a plurality of rotary magnetic heads (1a, 1b, 1c, 1d), a plurality of reproducing amplifiers (5a-5d), recording/reproducing mode switching circuits (4a-4d), head selection circuits (6, 7), control circuits (21, 22) and a DC voltage source (23). The control signal circuit (21, 22) and the DC voltage source (23) receive a control signal transmitted from a stator drum through a rotary transformer (17, 18b) and produce signals for controlling the mode switching circuits (4a-4d) and the head selecting circuits (6, 7) and a DC voltage for energizing all the circuits on the rotor drum, respectively.

公开(公告)号：EP0051123A3

公开(公告)日：1982-11-17

申请号：EP81106696

申请日：1981-08-28

Applicant: International Business Machines Corporation

Inventor： Brock, George William ,  Hyland, Robert Norman ,  Pawlowski, Edward Joseph ,  Shelledy, Frank Boyd

IPC: G11B05/14 ,  G11B05/20 ,  G11B05/221 ,  G11B05/42

CPC classification number: G11B5/133 ,  G11B5/17

Abstract: A magnetic head assembly useful as a write head is formed with a ferrite substrate, having a recess (14) in one surface in which a conductive coil (18) is deposited, and a ferrite closure having a planar surface that is joined to the substrate surface to establish a transducing gap and to enclose the coil. In operation, pulsed write current is applied to the write head. A low resistivity ferrite substrate and closure are employed to provide a high saturation flux density.

公开(公告)号：EP0030625A3

公开(公告)日：1981-08-26

申请号：EP80107023

申请日：1980-11-14

Applicant: International Business Machines Corporation

Inventor： Argumedo, Armando Jesus ,  Brock, George William ,  Losee, Paul Dee

IPC: G11B05/14 ,  G11B05/42 ,  G11B05/60

CPC classification number: G11B5/255 ,  G11B5/1335 ,  G11B5/193 ,  Y10T29/49041 ,  Y10T29/49055 ,  Y10T29/49057

Abstract: A magnetic head assembly includes a ferrite core (10) sandwiched between two ceramic layers (12, 14). Alumina films (11, 13, 15, 17) are deposited by sputtering on the sides of the ferrite core and on the ceramic layers in one embodiment, and on the ferrite core only in another embodiment, which are then bonded to form an integral head assembly. Slots (20, 22, 24, 26) to provide flying height control are formed in the air bearing surface of the ceramic layers. The process of making the assembly includes the steps of sputter etching the ferrite and ceramic prior to the deposition of the alumina.

Abstract translation: 磁头组件包括夹在两个陶瓷层之间的铁氧体磁芯。 氧化铝膜通过溅射沉积在铁氧体磁芯的侧面和陶瓷层的一个结构中，并且在铁氧体磁芯上仅在另一结构中沉积，然后将其结合以形成一体的磁头组件。 在陶瓷层的空气轴承表面形成有提供飞行高度控制的槽。 制造组件的过程包括在氧化铝沉积之前溅射刻蚀铁素体和陶瓷的步骤。

公开(公告)号：WO1981000780A1

公开(公告)日：1981-03-19

申请号：PCT/US1980000784

申请日：1980-06-23

Applicant: MINNESOTA MINING & MFG CO

Inventor： MINNESOTA MINING & MFG CO ,  BARNES C ,  BEHREN R

IPC: G11B05/14

CPC classification number: G11B15/62 ,  G11B5/105 ,  G11B5/187 ,  G11B5/265

Abstract: This invention relates generally to composite magnetic heads and relates particularly to composite magnetic heads operating with respect to multitrack recorder carrier (32). The composite magnetic head is adapted to record and read records to and from a record carrier particularly suited to a multitrack record carrier (32) and more particularly suited to a multitrack magnetic tape. A composite magnetic head may be moved transversely with respect to the direction of movement of the record carrier so that head alignment with any one of the multitracks of the record carrier may be achieved. The record carrier (32) contacts the head assembly defining a scrub surface (22). A yoke (20) is provided supporting a ferrite core (10) containing an effective gap (26) which permits the head to be physically mounted with respect to the record carrier (32). The yoke (20) is constructed and mounted so that one surface of the yoke (20) is coplanar with the scrub surface (22) of the ferrite core (10) and which extends in both directions transversely to the motion of the record carrier (32) at least a distance equal to the width of the record carrier in each direction so that the record carrier may be evenly supported over the range of movement of the record carrier. A central open area of the yoke (20) is provided to allow for physical access to the coil windings (18, 30) of the ferrite core.

Abstract translation: 本发明一般涉及复合磁头，尤其涉及相对于多轨记录载体（32）操作的复合磁头。 复合磁头适于将记录记录到特定于多轨记录载体（32）的记录载体上并从记录载体读取记录，更特别适用于多轨磁带。 复合磁头可以相对于记录载体的移动方向横向移动，使得可以实现与记录载体的任何一个多轨迹的磁头对准。 记录载体（32）接触限定擦洗表面（22）的头部组件。 设置有支撑铁氧体磁芯（10）的磁轭（20），其包含有效间隙（26），该有效间隙允许磁头相对于记录载体（32）物理安装。 磁轭（20）被构造和安装成使得磁轭（20）的一个表面与铁氧体磁芯（10）的擦拭表面（22）共面并且横向于记录载体的运动在两个方向上延伸 32）在每个方向上至少等于记录载体的宽度的距离，使得记录载体可以在记录载体的移动范围内被均匀地支撑。 磁轭（20）的中心开放区域被设置成允许物理地接近铁氧体磁芯的线圈绕组（18,30）。