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1. 发明授权

US4743988A Thin-film magnetic head 失效
标题翻译：薄膜磁头
公开(公告)号：US4743988A
公开(公告)日：1988-05-10
申请号：US823252
申请日：1986-01-28
申请人： Kazuhiro Sato , Togo Nishiyama , Katsuhiko Oguri
发明人： Kazuhiro Sato , Togo Nishiyama , Katsuhiko Oguri
IPC分类号： G11B5/31 , G11B5/147
CPC分类号： G11B5/31 , G11B5/3103 , G11B5/3163
摘要： A thin-film magnetic head is disclosed wherein a first core portion includes an insulative island of inorganic material. A first coil section is formed in the island so that it presents a flat common surface with the island and substrate. A gap-forming insulating layer is on the first coil section and the first core portion. A second core portion is on the gap-forming layer, forming a magnetic circuit with the first core portion. A second coil section is connected to the first coil section to form a coil therewith. In a modification, the head comprises a nonmagnetic substrate in which a coil section is formed to present a flat common surface. Metallic ferromagnetic material is used to form core portions on the coil section.
摘要翻译：公开了一种薄膜磁头，其中第一芯部分包括绝缘岛的无机材料。在岛中形成第一线圈段，使得其与岛和衬底呈现平坦的公共表面。间隙形成绝缘层位于第一线圈部分和第一芯部分上。第二芯部位于间隙形成层上，与第一芯部形成磁路。第二线圈部分连接到第一线圈部分以与其形成线圈。在一个变型中，头包括非磁性衬底，其中形成线圈段以呈现平坦的公共表面。金属铁磁材料用于在线圈部分上形成芯部分。

2. 发明授权

US4143409A Transducer feeding mechanism in an apparatus for recording and reproducing a signal on and from a rotary recording medium 失效
标题翻译：用于记录和再现来自旋转记录介质的信号的装置中的传感器输送机构
公开(公告)号：US4143409A
公开(公告)日：1979-03-06
申请号：US827023
申请日：1977-08-23
申请人： Yoshitaka Iwabuchi , Seiichi Takashima , Togo Nishiyama
发明人： Yoshitaka Iwabuchi , Seiichi Takashima , Togo Nishiyama
IPC分类号： G11B21/18 , G11B21/02 , G11B21/04 , G11B21/08 , G11B5/012
CPC分类号： G11B21/04
摘要： A transducer feeding mechanism in an apparatus for recording and reproducing a signal on and from a rotary recording medium by means of a transducer fed over the recording medium in the radial direction thereof comprises a rotational motive power source having a rotary shaft and a pinion provided on the shaft, a rack meshed with said pinion and fed in translational movement by the rotation of the pinion, at least two guide bars extending parallelly in the direction of feeding of the transducer, a first feeding carriage on which the rack is mounted and which is guided by one of the guide bars, biasing means provided on the first feeding carriage and functioning to contact another guide bar in an elastic manner and to urge the first feeding carriage in a direction to cause the rack to mesh further with the pinion, a second feeding carriage on which the transducer is mounted, and which is guided by said other guide bar, a guide member mounted on the second feeding carriage and contacting in a rotationally displaceable manner said one of the guide bars, and engagement means functioning to place the first and second feeding carriages in contacting engagement in the feeding direction along the guide bars and in a mutually displaceable state within a plane perpendicular to the feeding direction.

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