Victor Company of Japan, Limited

Togo Nishiyama

Kazuhiro Sato

Katsuhiko Oguri

Yoshitaka Iwabuchi

Seiichi Takashima

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.

Thin-film magnetic head

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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Yokohama, Japan

Togo Nishiyama