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1. 发明授权

US5392169A Electrical means to diminish read-back signal waveform distortion in recording heads 失效
标题翻译：电气意味着减少记录头中的回读信号波形失真
公开(公告)号：US5392169A
公开(公告)日：1995-02-21
申请号：US73187
申请日：1993-06-08
申请人： Bernell E. Argyle , Anthony P. Praino , Mark E. Re , Rudolf Schafer , Shinji Takayama , Philip L. Trouilloud
发明人： Bernell E. Argyle , Anthony P. Praino , Mark E. Re , Rudolf Schafer , Shinji Takayama , Philip L. Trouilloud
IPC分类号： G11B5/00 , G11B5/09 , G11B5/187 , G11B5/31 , G11B5/455 , G11B5/465 , G11B19/04 , G11C19/08 , H01F13/00 , H01H47/00
CPC分类号： G11B19/04 , G11B5/09 , G11B5/1878 , G11B5/3113 , G11B5/455 , G11B5/465 , G11B2005/0008
摘要： A method and apparatus for conditioning a magnetic read/write head to substantially eliminate read-back pulse distortions associated with unfavorable magnetic domain patterns in the head stores the polarity of the last write current pulse of a write pulse train applied to the head-coils. This polarity is compared to a pre-determined reset current pulse polarity. If the last write current polarity is opposite to the reset current polarity, then a reset pulse, or a series of pulses, having the pre-determined reset polarity is applied to the head prior to performing a read operation with the head. The pre-determined reset polarity corresponds to the polarity that resets the head to the magnetic domain state most preferred for reading due to reduction of read-back distortion. The reset pulse, or pulse train, according to the present invention is of constant polarity. If the last write current pulse polarity is the same as the reset polarity, then no reset pulse is applied to the head. Prior to applying the reset pulse, the head is either re-positioned or, if not re-positioned, the reset pulse is applied to the head only when it is flying over a sector gap.
摘要翻译：用于调节磁读/写头以基本上消除与头部中不利的磁畴图案相关联的回读脉冲失真的方法和装置存储施加到磁头线圈的写入脉冲序列的最后写入电流脉冲的极性。该极性与预定的复位电流脉冲极性进行比较。如果最后的写入电流极性与复位电流极性相反，则在执行与磁头的读取操作之前，将具有预定复位极性的复位脉冲或一系列脉冲施加到磁头。预定的复位极性对应于由于回读失真的减少将磁头重置为最优选用于读取的磁畴状态的极性。根据本发明的复位脉冲或脉冲串具有恒定的极性。如果最后一个写入电流脉冲极性与复位极性相同，则不会对磁头施加复位脉冲。在应用复位脉冲之前，头部被重新定位，或者如果不是重新定位，则仅当其在扇形间隙上飞行时才将复位脉冲施加到头部。

2. 发明授权

US07136243B2 Method and apparatus for correcting for systematic errors in timing pattern generation 失效
标题翻译：用于校正定时模式生成中的系统误差的方法和装置
公开(公告)号：US07136243B2
公开(公告)日：2006-11-14
申请号：US11015130
申请日：2004-12-17
申请人： Timothy J. Chainer , Anthony P. Praino , Mark D. Schultz , Bucknell C. Webb , Edward J. Yarmchuk
发明人： Timothy J. Chainer , Anthony P. Praino , Mark D. Schultz , Bucknell C. Webb , Edward J. Yarmchuk
IPC分类号： G11B5/09 , G11B21/02
CPC分类号： G11B5/59633 , G11B5/5565 , G11B21/106
摘要： Improvements in placement of timing patterns in self-servowriting include correcting for systematic errors due to geometric effects. A correction is made for varying systematic errors, such as when the recording head has spatially separate read and write elements. Further, servopattern rotation due to residual or unmeasured systematic errors is reduced by using a once per revolution clock index derived from the motor drive current waveform or any other sensor. In one aspect of correcting for systematic errors in the writing of timing patterns on a storage medium of a storage device, a time interval between a trigger pattern written at a first radial position of the storage medium and a rotational index is measured. The rotational index is related to the rotational orientation of the storage medium with respect to a fixed frame of the storage device. The location of another trigger pattern to be written is shifted, using the measured time interval to determine the shift in location for the another trigger pattern.
摘要翻译：自我维护中定时模式布局的改进包括纠正由于几何效应引起的系统误差。对变化的系统误差进行校正，例如当记录头具有空间上分离的读和写元件时。此外，通过使用从电动机驱动电流波形或任何其他传感器导出的每转一次的时钟指数来减少由于残余或未测量的系统误差引起的伺服模式旋转。在对存储装置的存储介质上的定时模式的写入进行校正系统错误的一个方面，测量在存储介质的第一径向位置上写入的触发模式与旋转指标之间的时间间隔。旋转指数与存储介质相对于存储装置的固定框架的旋转取向有关。使用测量的时间间隔来移动要写入的另一个触发模式的位置，以确定另一个触发模式的位置偏移。

3. 发明授权

US5527110A Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging 失效
标题翻译：使用热邻近成像检测磁盘上的凹凸的方法和装置
公开(公告)号：US5527110A
公开(公告)日：1996-06-18
申请号：US56164
申请日：1993-04-30
申请人： David W. Abraham , Anthony P. Praino , Mark E. Re , Hemantha K. Wickramasinghe
发明人： David W. Abraham , Anthony P. Praino , Mark E. Re , Hemantha K. Wickramasinghe
IPC分类号： G01N25/72 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/596 , G11B5/60 , G11B5/82 , G11B11/00 , G11B11/06 , G11B13/00 , G11B17/32 , G11B19/04 , G11B20/10 , G11B20/24 , G11B33/10 , G01N25/70
CPC分类号： G11B20/10009 , G01N25/72 , G11B11/00 , G11B13/00 , G11B17/32 , G11B20/24 , G11B33/10 , G11B5/00 , G11B5/012 , G11B5/59683 , G11B5/607 , G11B11/06 , G11B19/04 , G11B2005/0021 , G11B5/02 , G11B5/59633 , G11B5/6005 , G11B5/82
摘要： A method and apparatus for mapping the character and location of small surface variations on a planar surface. Energy is supplied to an object in close proximity to the planar surface to thereby raise the temperature of the object. The object is moved with respect to the planer surface substantially constant. A decrease in temperature of the object is detected when it is in proximity to the variation to define the location and character of the variation. The energy supply may be thermal energy or optical energy but preferably is electrical energy which heats a resistive element. Preferably, the object is the magnetoresistive head of a disk drive assembly. The surface may be that of a magnetic recording material. The change in temperature is detected by monitoring the resistance of the magnetoresistive coil of the head. The energy may be supplied in pulses to obtain higher peek temperatures while avoiding mechanical distortion of the object. It is preferred that the object be positioned with respect to the surface so that when that relative motion between the surface and the object occurs, the object does not contact the surface.
摘要翻译：一种在平坦表面上映射小表面变化的字符和位置的方法和装置。能量被提供给靠近平面的物体，从而提高物体的温度。物体相对于平面移动大致恒定。当物体接近变化以检测变化的位置和特征时，检测物体的温度的降低。能量供应可以是热能或光能，但优选是加热电阻元件的电能。优选地，该目的是磁盘驱动器组件的磁阻磁头。表面可以是磁记录材料的表面。通过监测磁头的磁阻线圈的电阻来检测温度变化。可以以脉冲提供能量以获得更高的窥视温度，同时避免物体的机械变形。优选地，物体相对于表面定位，使得当表面和物体之间的相对运动发生时，物体不接触表面。

4. 发明授权

US5115664A Tunable feedback transducer for transient friction measurement 失效
标题翻译：用于瞬态摩擦测量的可调谐反馈传感器
公开(公告)号：US5115664A
公开(公告)日：1992-05-26
申请号：US543239
申请日：1990-06-25
申请人： Suryanarayan G. Hegde , Anthony P. Praino , Steven J. Root , Muthuthamby Sri-Jayantha
发明人： Suryanarayan G. Hegde , Anthony P. Praino , Steven J. Root , Muthuthamby Sri-Jayantha
IPC分类号： G01N19/02 , G11B19/20 , G11B33/10
CPC分类号： G11B33/10 , G01N19/02 , G11B19/20
摘要： A system for measuring transient friction of a head-disk interface in a magnetic disk storage device employs a servo system for accurate measurements. A first movable member carries a slider simulating a magnetic head which rests on a disk when said disk is at rest. The movable member is movably mounted to a second fixed member. A frictionless detector detects a displacement of the movable member relative to a position of the fixed member produced by a force due to friction when the disk spins. A servo system maintains a fixed distance between first and second members in response to an output from the detector and moves the movable member in response thereto. The output is taken from the servo system and provides a signal proportional a force due to friction exerted on said movable member.
摘要翻译：用于测量磁盘存储装置中的磁头 - 磁盘接口的瞬时摩擦的系统采用伺服系统进行精确的测量。当所述盘静止时，第一可移动构件承载模拟磁头的滑块，所述磁头搁置在盘上。可移动构件可移动地安装到第二固定构件。无摩擦检测器检测当盘旋转时相对于由摩擦产生的力产生的可动构件相对于固定构件的位置的移动。伺服系统响应于检测器的输出而保持第一和第二构件之间的固定距离，并响应于此移动可动构件。输出从伺服系统中取出，并且由于施加在所述可动构件上的摩擦而提供与之成正比的信号。

5. 发明授权

US06819513B2 Low power hard disk drive using multiple, individually controllable actuators 失效
标题翻译：低功率硬盘驱动器使用多个独立可控的执行器
公开(公告)号：US06819513B2
公开(公告)日：2004-11-16
申请号：US10038699
申请日：2002-01-02
申请人： Timothy J. Chainer , Anthony P. Praino
发明人： Timothy J. Chainer , Anthony P. Praino
IPC分类号： G11B1512
CPC分类号： G11B5/5552 , G11B5/4976 , G11B5/5526
摘要： A disk drive which incorporates separate actuators for each recording head so as to only place required recording heads over the recording media of multiple surface hard disk drives. The reduction in recording heads that are placed over the recording media reduces drag on the rotating disk holding the recording media and thereby reduces the power consumption. Reducing the number of recording heads over the recording media also reduces damage to the recording media surfaces in the event of a physical shock to the drive since inactive transducer heads are not in a position to damage the recording media.
摘要翻译：一个磁盘驱动器，其中包含用于每个记录头的单独的致动器，以便仅将所需的记录头放置在多个表面硬盘驱动器的记录介质上。放置在记录介质上的记录头的减少减少了保持记录介质的旋转盘上的拖动，从而降低了功耗。在记录介质上减少记录头的数量也可以减少在对驱动器造成物理冲击的情况下对记录介质表面的损坏，因为无效传感器头不能损坏记录介质。

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