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    Head assembly for recording and reading, employing inductive and magnetoresistive elements
    1.
    发明授权
    Head assembly for recording and reading, employing inductive and magnetoresistive elements 失效
    用于记录和读取的头部组件，采用感应和磁阻元件

    公开(公告)号：US3887945A

    公开(公告)日：1975-06-03

    申请号：US42424273

    申请日：1973-12-12

    Applicant: IBM

    Inventor： NEPELA DANIEL A ,  POTTER ROBERT I

    IPC: G11B5/31 ,  G11B5/127 ,  G11B5/37 ,  G11B5/39 ,  G11B19/02 ,  G11B5/30 ,  G11B5/12

    CPC classification number: G11B5/3967 ,  G11B19/02

    Abstract: A head assembly for recording and reading data includes a pair of conductive films having a thin magnetoresistive (MR) element therebetween to achieve reading of magnetically recorded data; and having a pair of outer highly permeable members to accomplish writing of data on a magnetic medium. Control currents are applied to the conductors during each mode to provide the necessary bias for either inductive or magnetoresistive operation exclusively.

    Abstract translation: 用于记录和读取数据的头组件包括一对导电膜，其间具有薄磁阻（MR）元件，以实现磁记录数据的读取; 并且具有一对外部高度可渗透的构件以完成在磁性介质上的数据写入。 在每个模式下，控制电流被施加到导体，以便为电感或磁阻操作提供必要的偏置。

    Three-gap magnetic recording head having a single flux sensing means
    2.
    发明授权
    Three-gap magnetic recording head having a single flux sensing means 失效
    具有单个磁通感测装置的三间隙磁记录头

    公开(公告)号：US3881191A

    公开(公告)日：1975-04-29

    申请号：US25511672

    申请日：1972-05-19

    Applicant: IBM

    Inventor： POTTER ROBERT I ,  WARNER MICHAEL W

    IPC: G11B5/11 ,  G11B5/17 ,  G11B5/187 ,  G11B5/23 ,  G11B5/265 ,  G11B5/31 ,  G11B5/39 ,  G11B5/27

    CPC classification number: G11B5/39 ,  G11B5/17 ,  G11B5/187 ,  G11B5/2652 ,  G11B5/31

    Abstract: A magnetic head is disclosed having an inner magnetic core and an outer magnetic core that is magnetically spaced about the inner core so as to form a three transducer gap structure. A flux sensing means is linked solely with the inner core. The fringing fields under the two outer transducer gaps have the same direction and are of smaller magnitude and in the opposite direction than the fringing field under the central transducer gap. The composite fringing field contributed by this structure results in a narrow pulse width and is useful in high-resolution high-recording density systems.

    Abstract translation: 公开了一种磁头，其具有内磁芯和外磁心，该磁芯与内磁芯隔开间隔开，以形成三个换能器间隙结构。 磁通感测装置仅与内芯连接。 两个外部换能器间隙下的边缘区域具有与中心换能器间隙下方的边缘场相同的方向并且具有较小的幅度和相反的方向。 由该结构贡献的复合边缘场导致窄的脉冲宽度，并且在高分辨率高记录密度系统中是有用的。

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