公开(公告)号：US20100032039A1

公开(公告)日：2010-02-11

申请号：US12450006

申请日：2008-02-14

申请人： Masashi Nemoto ,  Yukio Yaginuma ,  Takeo Yamashita

发明人： Masashi Nemoto ,  Yukio Yaginuma ,  Takeo Yamashita

IPC分类号： F16K15/14

CPC分类号： H01M2/1229 ,  H01M2/1294 ,  H01M8/02 ,  H01M8/04082 ,  H01M8/04201 ,  H01M8/2465 ,  Y10T137/7879 ,  Y10T137/7881 ,  Y10T137/7888

摘要： Provided is a small, simple-structured, homogeneous and mass-producible excessive pressure release valve which works even at a relatively low excessive pressure to surely and safely release the pressure to the external world. The excessive pressure release valve has an elastic rubber plate and a reversibly openable slit that passes through the upper and the lower surfaces and release the pressure to the external world when the internal excessive pressure stressing on the lower side surface, pushes and opens the slit toward upper surface side. The elastic rubber plate is made of silicone rubber containing 1-20% by mass of silicone oil.

摘要翻译： 提供了一种小型，简单结构，均质和大量生产的过压释放阀，即使在相对较低的过压下也可以安全地释放对外界的压力。 过压式释放阀具有弹性橡胶板和可逆地打开的狭缝，其通过上表面和下表面，并且当在下侧表面上的内部过度压力应力时将压力释放到外部世界，将狭缝朝向 上表面。 弹性橡胶板由含有1-20质量％的硅油的硅橡胶制成。

公开(公告)号：US07154687B2

公开(公告)日：2006-12-26

申请号：US11041228

申请日：2005-01-25

申请人： Hiroshi Ikekame ,  Takeo Yamashita

发明人： Hiroshi Ikekame ,  Takeo Yamashita

IPC分类号： G11B5/09

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B20/10009 ,  G11B2005/0013

摘要： Devices and methods for generating a magnetic head-specific overshoot current which is combined with an alternating current waveform into a write current used by the magnetic head to store information on a magnetic medium. A processor analyzes the frequency of incoming write data and retrieves from a data table of an overshoot current amplitude and an overshoot current phase. This amplitude and phase information is sent to an overshoot current generator to generate an overshoot current that is responsive to the dynamic impedance properties of a magnetic write head during operation. The data table may have information related to one or many write heads, and the data table may be further subdivided based on additional dynamic characteristics of a write head that may affect the impedance thereof.

公开(公告)号：US4851942A

公开(公告)日：1989-07-25

申请号：US95751

申请日：1987-09-14

申请人： Niroyuki Kumasaka ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito ,  Yokuo Saitoh ,  Hiroshi Sakurai

发明人： Niroyuki Kumasaka ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito ,  Yokuo Saitoh ,  Hiroshi Sakurai

IPC分类号： G01B7/00 ,  G01D5/245 ,  G11B5/105 ,  G11B5/127 ,  G11B5/187 ,  G11B5/60

CPC分类号： G11B5/1272 ,  G11B5/105 ,  G11B5/187 ,  G11B5/6005

摘要： A core burying channel is formed on the outer side surface of an air bearing rail of a floating magnetic head floating on a magnetic disk by an air-flow in a direction perpendicular to a magnetic recording medium travelling direction, and a magnetic core is buried in this core burying channel. This magnetic head can be produced easily by a production method which forms a core burying channel in a non-magnetic block, then deposits a magnetic material to the core burying channel and removes unnecessary portions of the magnetic material.

摘要翻译： 在垂直于磁记录介质传送方向的空气流中，在浮动磁头上的浮动磁头的空气轴承轨道的外侧表面上形成芯掩埋通道，并将磁芯埋入 这个核心埋葬渠道。 该磁头可以通过在非磁性块中形成芯埋入通道的制造方法容易地制造，然后将磁性材料沉积到芯掩埋通道并去除磁性材料的不需要的部分。

公开(公告)号：US4656547A

公开(公告)日：1987-04-07

申请号：US608407

申请日：1984-05-09

申请人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Mitsuhiro Kudo

发明人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Mitsuhiro Kudo

IPC分类号： G11B5/127 ,  G11B5/187 ,  G11B5/23 ,  G11B5/245 ,  G11B5/147 ,  G11B5/17

CPC分类号： G11B5/1874

摘要： There is provided a structure of a composite type magnetic head and its manufacturing method. The composite type magnetic head comprises: two high permeability ferrite blocks with projections having nearly edged sections formed thereon; magnetic films having a high saturation flux density deposited on the side faces of the projections, the magnetic films confronting each other via a functional gap near front ends of said projections; guard films deposited over the magnetic films comprising a non-magnetic material; and non-magnetic materials filled on the guard films up to side face of the coil. This magnetic head exhibits excellent recording and reproducing characteristics. The contour effect is negligibly small. The reaction between the magnetic film and the non-magnetic material is prevented by the guard film.

摘要翻译： 提供复合型磁头的结构及其制造方法。 复合型磁头包括：两个高磁导率铁氧体块，其上形成有几乎边缘的突起; 沉积在突起的侧面上的具有高饱和磁通密度的磁性膜通过在所述突起的前端附近的功能间隙相互面对; 保护膜沉积在包含非磁性材料的磁性膜上; 以及填充在保护膜上的非磁性材料直到线圈的侧面。 该磁头具有出色的记录和再现特性。 轮廓效应可忽略不计。 保护膜可防止磁性膜与非磁性材料之间的反应。

公开(公告)号：US4559572A

公开(公告)日：1985-12-17

申请号：US575704

申请日：1984-01-31

申请人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Nobuo Kobayashi ,  Mitsuhiro Kudo

发明人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Nobuo Kobayashi ,  Mitsuhiro Kudo

IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/23 ,  G11B5/31 ,  G11B5/12

CPC分类号： G11B5/147 ,  G11B5/3106

摘要： A magnetic head core and a method of fabricating same, wherein a magnetic circuit is constituted by a pair of magnetic films having a V-shaped cross section which face each other at each protrudent section through the gap material. The cross-sectional portion of the V-shaped film is exposed to the surface facing the magnetic recording medium. The protrusions of the magnetic film pair have tip planes parallel to each other and substantially perpendicular to the moving direction of the magnetic recording medium. The tip plane has a width defined by the line of intersection between the plane and the surface facing the magnetic recording medium in correspondence to the recording track width. At least one of the magnetic films has a window for winding an excitation coil. The magnetic film is formed on the non-magnetic protection member having a V-shaped protrusion. The magnetic head has superior recording and reproducing characteristics in a wide frequency band with less rubbing noise, high wear-resistivity and high productivity, and operates without the pseudo gap effect. The magnetic head core is fabricated through the steps of forming a coil winding groove in the gap forming plane of a non-magnetic core block, forming a number of parallel grooves perpendicularly to the winding groove so that a number of V-shaped protrusions are produced, forming a magnetic film on the surface of the protrusions, forming a gap plane after the magnetic film has been coated with non-magnetic material, and splitting the block and then combining the two core blocks to complete a magnetic head core.

摘要翻译： 一种磁头芯及其制造方法，其中磁路由通过间隙材料的每个突出部分彼此面对的具有V形横截面的一对磁膜构成。 V形膜的横截面部分暴露于面向磁记录介质的表面。 磁性膜对的突起具有彼此平行的并且基本上垂直于磁记录介质的移动方向的尖端平面。 尖端平面具有与记录轨道宽度相对应的平面与面向磁记录介质的表面之间的交点线限定的宽度。 至少一个磁性膜具有用于缠绕励磁线圈的窗口。 磁性膜形成在具有V形突起的非磁性保护构件上。 磁头在宽频带具有优异的记录和再现特性，具有较少的摩擦噪声，高耐磨性和高生产率，并且没有伪间隙效应。 通过在非磁性芯块的间隙形成平面中形成线圈绕槽的步骤制造磁头芯，与绕组槽垂直地形成多个平行的沟槽，从而产生多个V形突起 在突起的表面上形成磁性膜，在磁性膜被非磁性材料涂覆之后形成间隙平面，分割该块，然后组合两个核心块，从而形成磁头芯。

公开(公告)号：US08421512B2

公开(公告)日：2013-04-16

申请号：US13166709

申请日：2011-06-22

申请人： Tomoo Murata ,  Takeo Yamashita

发明人： Tomoo Murata ,  Takeo Yamashita

IPC分类号： H03K3/017

CPC分类号： H03K5/1565

摘要： A duty compensation circuit including a duty detection circuit, a duty adjustment signal generator for generating a control signal from a detected duty, and a duty adjustment circuit, in which the duty detection circuit executes sampling of a clock at sampling timing obtained by causing the clock to be delayed by a variable delay circuit, thereby detecting a duty. Thereby, duty compensation is enabled without preparing a clock higher in operating speed than a clock before compensation.

摘要翻译： 一种占空比补偿电路，包括占空比检测电路，用于从检测到的占空比产生控制信号的占空比调节信号发生器和占空比调整电路，其中占空比检测电路在采样时刻执行采样时钟的采样， 被可变延迟电路延迟，从而检测占空比。 因此，在不准备运行速度比在补偿之前的时钟更高的时钟的情况下，实现占空比补偿。

公开(公告)号：US20100110751A1

公开(公告)日：2010-05-06

申请号：US12603623

申请日：2009-10-22

申请人： Kentaro Miyajima ,  Takeo Yamashita ,  Tomoo Murata

发明人： Kentaro Miyajima ,  Takeo Yamashita ,  Tomoo Murata

IPC分类号： G11C11/00 ,  G11C7/00 ,  G11C8/08 ,  G11C17/18

CPC分类号： G11C7/02 ,  G11C7/20 ,  G11C17/16 ,  G11C17/165 ,  G11C17/18

摘要： In a configuration having a nonvolatile memory and a volatile memory, when storage information of the nonvolatile memory is changed and an abnormal operation occurs due to temporary blackout, α-ray or others, the abnormal operation is recovered to a normal operation regardless of the presence of the detection of the abnormal operation. A reset to be inputted to the nonvolatile memory is collectively transmitted for each 1 bit, each 1 word or each predetermined arbitrary bit, and the collectively transmitted reset serving as one unit is periodically transmitted, so that the abnormal operation is recovered to a normal operation without input signals from outside even if the storage information of the nonvolatile memory is changed due to temporary blackout, α-ray or others.

摘要翻译： 在具有非易失性存储器和易失性存储器的配置中，当非易失性存储器的存储信息改变并且由于暂时中断，α射线等而发生异常操作时，异常操作恢复到正常操作，而不管存在 的异常操作的检测。 对于每1位，每1个字或每个预定的任意位，共同地发送要输入到非易失性存储器的复位，并且周期性地发送作为一个单元的共同发送的复位，使得异常操作恢复到正常操作 即使非易失性存储器的存储信息由于暂时中断，α射线等而改变，也没有来自外部的输入信号。

公开(公告)号：US20050128618A1

公开(公告)日：2005-06-16

申请号：US11041228

申请日：2005-01-25

申请人： Hiroshi Ikekame ,  Takeo Yamashita

发明人： Hiroshi Ikekame ,  Takeo Yamashita

IPC分类号： G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B20/10

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B20/10009 ,  G11B2005/0013

摘要： Devices and methods for generating a magnetic head-specific overshoot current which is combined with an alternating current waveform into a write current used by the magnetic head to store information on a magnetic medium. A processor analyzes the frequency of incoming write data and retrieves from a data table of an overshoot current amplitude and an overshoot current phase. This amplitude and phase information is sent to an overshoot current generator to generate an overshoot current that is responsive to the dynamic impedance properties of a magnetic write head during operation. The data table may have information related to one or many write heads, and the data table may be further subdivided based on additional dynamic characteristics of a write head that may affect the impedance thereof.

公开(公告)号：US5463518A

公开(公告)日：1995-10-31

申请号：US673866

申请日：1991-03-22

申请人： Shigekazu Otomo ,  Noriyuki Kumasaka ,  Kazuo Shiiki ,  Takeo Yamashita ,  Noritoshi Saito ,  Yoshinobu Tarutani

发明人： Shigekazu Otomo ,  Noriyuki Kumasaka ,  Kazuo Shiiki ,  Takeo Yamashita ,  Noritoshi Saito ,  Yoshinobu Tarutani

IPC分类号： G01R33/035 ,  G11B5/00 ,  G11B5/127 ,  G11B5/31 ,  G11B5/33 ,  G11B5/40 ,  G11B5/53 ,  G11B33/14 ,  G11B5/147 ,  G01C21/08 ,  G01R33/02

CPC分类号： G11B5/1278 ,  G01R33/0358 ,  G11B5/00 ,  G11B5/31 ,  G11B5/313 ,  G11B5/3143 ,  G11B5/332 ,  G11B5/40 ,  G11B5/53 ,  G11B33/14 ,  Y10S505/843

摘要： A magnetic head has a superconducting quantum interference device having a ring made of a superconductive material including a Josephson junction which links to a magnetic flux generated by a magnetic recording medium, and a magnetic pole for guiding the magnetic flux generated by the magnetic recording medium or the ring made of a superconductive material arranged in parallel to a plane of the magnetic recording medium so that the magnetic flux generated by the magnetic recording medium flows into a through-hole of the ring. A magnetic recording and reproducing apparatus includes such a magnetic head, a winding to which a reproduced signal from the magnetic head is applied and the superconductive ring including the Josephson junction arranged such that the magnetic flux generated by the winding flows thereto.

摘要翻译： 磁头具有超导量子干涉装置，其具有由超导材料制成的环，该超导材料包括与由磁记录介质产生的磁通相关联的约瑟夫逊结，以及用于引导由磁记录介质产生的磁通的磁极或 由与磁记录介质的平面平行布置的超导材料制成的环，使得由磁记录介质产生的磁通流入环的通孔。 磁记录和再现装置包括这样的磁头，施加来自磁头的再现信号的绕组和包括约瑟夫逊结的超导环，其布置成使得由绕组产生的磁通量流向其。

公开(公告)号：US4847715A

公开(公告)日：1989-07-11

申请号：US941648

申请日：1986-12-15

申请人： Noriyuki Kumasaka ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito

发明人： Noriyuki Kumasaka ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito

IPC分类号： G11B5/265

CPC分类号： G11B5/2655

摘要： A tunnel erasing-type magnetic head having a short distance between the gaps, wherein a second core half is sandwiched between the first core half and the third core half, a magnetic gap for recording and reproducing the signals is formed between the first core half and the second core half, and a magnetic gap for erasing is formed between the second core half and the third core half, so that the second core half can be utilized for both recording and reproducing the signals and erasing the signals. The second core half is obtained by forming a thin magnetic film of a high saturation flux density on the base portion composed of a nonmagnetic material that forms the magnetic gap. The first and third core halves are also obtained by forming a thin magnetic film of a high saturation flux density on the magnetic gap surfaces of the base portions to produce performance that can be used for the magnetic recording media having high coercive force. The magnetic head has a short distance between the gaps. When used for a floppy disk apparatus, therefore, there does not develop under-erasing or over-erasing even for small disks, and the effective track width does not decrease, either. This head can be used also as the one in which an ordinary erasing head element and a recording and reproducing head element are combined together.

摘要翻译： 一种在间隙之间具有短距离的隧道擦除型磁头，其中第二芯体半部夹在第一芯部半部和第三芯部半部之间，用于记录和再生信号的磁隙形成在第一芯部半部和 第二磁芯半部和用于擦除的磁隙形成在第二磁芯半部和第三磁芯半部之间，使得第二磁芯半部可以用于记录和再现信号并擦除信号。 通过在由形成磁隙的非磁性材料构成的基部上形成具有高饱和磁通密度的薄磁膜来获得第二芯体半部。 通过在基部的磁隙表面上形成具有高饱和磁通密度的薄磁膜也可获得第一和第三半芯，以产生可用于具有高矫顽磁力的磁记录介质的性能。 磁头在间隙之间具有短距离。 因此，当用于软盘设备时，即使对于小盘也不会发生欠擦除或过度擦除，并且有效轨道宽度也不会降低。 该头也可以用作将普通擦除头元件和记录和再现头元件组合在一起的头。