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1. 发明授权

US5343342A Magnetic recording and playback system with feedback control of a movable transducer head 失效
标题翻译：磁记录和回放系统，具有可移动换能器头的反馈控制
公开(公告)号：US5343342A
公开(公告)日：1994-08-30
申请号：US672876
申请日：1991-03-20
申请人： Yuji Kanagawa , Masato Nagasawa , Eiji Yokoyama , Kimihide Nakatsu , Toshiharu Miyago
发明人： Yuji Kanagawa , Masato Nagasawa , Eiji Yokoyama , Kimihide Nakatsu , Toshiharu Miyago
IPC分类号： G11B5/588 , G11B21/02
CPC分类号： G11B5/588
摘要： In a magnetic recording/playback system having a magnetic head drive device for moving a movable head disposed within and mounted to a rotating upper drum in parallel with the axis of the drum, and a fixed drum supporting the upper drum so that the upper drum can rotate, an AC magnetic field generator is disposed along the peripheral surfaces of the drums at a location at which the magnetic tape is not wrapped on the drums. The AC magnetic field generator applies an AC magnetic field to the movable head that varies in the direction of the axis of the drums. Information on the position of the movable head is detected in accordance with the detection signal of the AC magnetic field derived by the movable head and the position of the movable head is controlled by feeding the detected positional infromation back to the magnetic head driving device.
摘要翻译：在具有磁头驱动装置的磁记录/重放系统中，磁头驱动装置用于使设置在滚筒的轴线上的旋转的上滚筒内的可移动头移动并安装到旋转的上滚筒上，以及支撑上滚筒的固定滚筒，旋转时，交流磁场发生器沿着磁鼓的周边表面设置在磁带未包裹在磁鼓上的位置。交流磁场发生器对可动头施加交流磁场，该磁头在鼓的轴线方向上变化。根据由可动头导出的AC磁场的检测信号来检测关于可移动头的位置的信息，并且通过将检测到的位置信息馈送回磁头驱动装置来控制可移动头的位置。

2. 发明授权

US5781372A Axial resonance attenuating apparatus for rotation drum apparatus having flexible rod-shaped linking members 失效
标题翻译：具有柔性杆形连接件的旋转鼓装置的轴向共振衰减装置
公开(公告)号：US5781372A
公开(公告)日：1998-07-14
申请号：US641174
申请日：1996-04-30
申请人： Toshiharu Miyago , Yumi Matsui , Yoshikazu Nishida
发明人： Toshiharu Miyago , Yumi Matsui , Yoshikazu Nishida
IPC分类号： G11B5/52 , F16F15/121 , G11B5/53 , G11B15/61 , G11B33/08 , H02K7/04 , G11B5/027
CPC分类号： G11B33/08 , F16F15/1215 , G11B15/61 , G11B5/53 , H02K7/04
摘要： An axial resonance attenuating apparatus is formed by a disk-shaped attaching member, which is attached to a rotation shaft of a rotation drum apparatus or one of mass objects which are fixed to the both ends of the rotation shaft. A ring-shaped weight is disposed outside the attaching member, and a linking member which is formed by a plurality of straight and flexible support rods partially links the weight and the attaching member. The respective members are formed as one unit by an acrylonitrile-butadiene-styrene copolymer (ABS resin).
摘要翻译：轴向共振衰减装置由安装在旋转鼓装置的旋转轴或固定在旋转轴的两端的质量物体之一的盘形安装构件形成。环形重物设置在安装构件的外侧，并且由多个直的和柔性的支撑杆形成的连接构件部分地连接重物和附接构件。各个构件通过丙烯腈 - 丁二烯 - 苯乙烯共聚物（ABS树脂）形成一个单元。

3. 发明授权

US5936809A Precision rotator 失效
标题翻译：精密旋转器
公开(公告)号：US5936809A
公开(公告)日：1999-08-10
申请号：US52939
申请日：1998-04-01
申请人： Yoshikazu Nishida , Toshiharu Miyago
发明人： Yoshikazu Nishida , Toshiharu Miyago
IPC分类号： G11B5/52 , G11B5/53
CPC分类号： G11B5/52
摘要： Between a manget (11) on the side of an upper drum (2) and a magnet or electromagnet (12) on the side of a lower drum (3), a force of attraction is exerted. With this force of attraction, pre-load of about 2 Kg is applied to a ball bearing (5) in a direction of an axis, to increase stability of rotation of the upper drum (2). Since the upper drum (2) is borne by the axis (4) with one bearing (5), a center of rotation of the upper drum (2) relative to the axis (4) can be changed by changing a balance among forces of attraction of three magnets or electromagnets (12). With this constitution, a precision rotator which allows correction of the center of rotation can be provided.
摘要翻译：在上滚筒（2）侧面的小工具（11）和下滚筒（3）侧面上的磁体或电磁体（12）之间施加吸引力。利用这种吸引力，约2Kg的预加载力在轴向方向上施加到滚珠轴承（5），以增加上鼓（2）的旋转稳定性。由于上滚筒（2）由一个轴承（5）由轴线（4）承载，所以上滚筒（2）相对于轴线（4）的旋转中心可以通过改变上滚筒吸引三个磁铁或电磁铁（12）。利用这种构造，可以提供允许校正旋转中心的精密旋转器。

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