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21. 发明授权

US07141969B2 X-Y spinstand platform with flexure-coupled platen 有权
标题翻译：带挠性联轴器的X-Y型自旋倾斜平台
公开(公告)号：US07141969B2
公开(公告)日：2006-11-28
申请号：US10811680
申请日：2004-03-29
申请人： Nahum Guzik
发明人： Nahum Guzik
IPC分类号： G01R33/00 , G01R33/12 , G01G11/00
CPC分类号： G11B5/4555 , G11B5/455 , Y10T74/20354
摘要： An XY platen positioning system includes a fixed base rigidly coupled to a essentially planar surface. An XY intermediate plate is slidably coupled to the fixed base, such that the XY intermediate plate is slidable in the X axis along the fixed base. An XY stage is slidably coupled to the XY intermediate plate, such that the XY stage is slidable in the Y axis along the XY intermediate plate. A platen is flexibly coupled to the XY stage, such that the platen, with respect to the XY stage, is essentially constrained in the X and Y axes and moveable in the Z axis.
摘要翻译： XY台板定位系统包括刚性地联接到基本平坦表面的固定基座。 XY中间板可滑动地联接到固定基座，使得XY中间板可沿着固定基座在X轴上滑动。 XY台可滑动地联接到XY中间板，使得XY台可沿Y轴中间板滑动。压板可以灵活地联接到XY平台，使得压板相对于XY平台基本上被约束在X轴和Y轴上并且可在Z轴上移动。

22. 发明授权

US06785085B2 Multi-frequency servo bursts in magnetic disc memory system 有权
标题翻译：磁盘存储系统中的多频伺服脉冲串
公开(公告)号：US06785085B2
公开(公告)日：2004-08-31
申请号：US10021444
申请日：2001-10-30
申请人： Nahum Guzik , Anatoli B. Stein , Alex Talalai
发明人： Nahum Guzik , Anatoli B. Stein , Alex Talalai
IPC分类号： G11B5596
CPC分类号： G11B5/59688 , G11B5/59633
摘要： A servo burst pattern for use in positioning a read/write head with respect to tracks on a magnetic disc medium includes a first set of servo bursts adjacently disposed on the tracks along a first axis perpendicular to the centerlines. Each of the first set of bursts is disposed on an individual track, from the inside track edge to the outside track edge, and alternates between a first frequency and a second frequency for consecutive servo bursts. The servo burst pattern also includes a second set of servo bursts adjacently disposed on the tracks along a second axis perpendicular to the centerlines and parallel to the first axis. Each of the second set of servo bursts is disposed on two adjacent tracks, from the centerline of one track to the centerline of a next adjacent track, and alternates between the first frequency and the second frequency for consecutive servo bursts.
摘要翻译：用于相对于磁盘介质上的磁道定位读/写磁头的伺服脉冲串模式包括沿垂直于中心线的第一轴相邻地布置在轨道上的第一组伺服脉冲串。第一组突发中的每一个被布置在从内侧轨道边缘到外部轨道边缘的单独的轨道上，并且在连续的伺服脉冲串的第一频率和第二频率之间交替。伺服脉冲串图案还包括沿着垂直于中心线并平行于第一轴线的第二轴线相邻地布置在轨道上的第二组伺服脉冲串。第二组伺服脉冲串中的每一个被布置在从一个轨道的中心线到下一个相邻轨道的中心线的两个相邻轨道上，并且在连续伺服脉冲串的第一频率和第二频率之间交替。

23. 发明授权

US6094047A Method and apparatus for balancing rotating components of a spinstand of a magnetic head and disk tester 失效
标题翻译：用于平衡磁头和磁盘测试仪的转台的旋转部件的方法和装置
公开(公告)号：US6094047A
公开(公告)日：2000-07-25
申请号：US982741
申请日：1997-12-02
申请人： Nahum Guzik , Ilia M. Bokchtein
发明人： Nahum Guzik , Ilia M. Bokchtein
IPC分类号： G01M1/38 , G11B5/455 , G11B17/038 , G11B25/04 , G11B33/08 , G11B33/10 , G11B33/12 , G11B17/02 , G11B17/04 , G11B17/08
CPC分类号： G11B33/121 , G11B17/038 , G11B25/043 , G11B33/08 , G11B33/10 , G11B5/455
摘要： An apparatus for balancing the spinstand of a magnetic head and disk testing system includes a base that rotationally supports a rotating spindle. The spindle supports a pack of disks and a slide moveable along guide rails of the spinstand. The slide, in turn, supports a stack of magnetic heads that is moveable in respect to the pack of disks. The spindle supports a balancing cap that has a plurality of threaded openings uniformly spaced in its peripheral surface. Imbalance is adjusted by threading screws into or out of the selected threaded openings. The value of imbalance is defined by vibration measurements; these measurements are performed by means of an accelerometer attached to the spindle housing, and of a rotary encoder that generates index pulse in a certain position of the spindle. In order to provide reliable measurements by means of the accelerometer, the spindle housing either can be fixed to test magnetic heads, or can be turned to a spring-loaded condition to increase sensitivity of the balancing procedure. Each time the disk pack is replaced, the system measures the amount of radial displacement of the screws in respective openings that is necessary to compensate the imbalance created by the new disk pack. The proposed balancing method includes manual or automated calibration procedure, automatic vibration measurements, and manual adjustment of the positions of screws in the balancing cap using the results of measurements.
摘要翻译：用于平衡磁头和磁盘测试系统的固定架的装置包括旋转地支撑旋转主轴的基座。主轴支撑一组磁盘和一个可沿着纺锤台的导轨移动的滑块。滑块又支持一堆可相对于一揽子磁盘移动的磁头。主轴支撑平衡盖，其具有在其外周表面上均匀间隔开的多个螺纹开口。通过将螺钉拧入或移出所选螺纹孔来调节不平衡。不平衡的值由振动测量定义; 这些测量通过附接到主轴壳体的加速度计和在主轴的特定位置产生索引脉冲的旋转编码器执行。为了通过加速度计提供可靠的测量，可以将主轴壳体固定在测试磁头上，或者可以转到弹簧加载状态，以提高平衡过程的灵敏度。每次更换磁盘组件时，系统将测量相应开口中的螺钉的径向位移量，以补偿新磁盘组件产生的不平衡所必需的量。所提出的平衡方法包括手动或自动校准程序，自动振动测量，以及使用测量结果手动调整平衡盖中的螺钉位置。

24. 发明授权

US6064261A Write amplifier with improved switching performance, output common-mode voltage, and head current control 失效
标题翻译：具有改进的开关性能，输出共模电压和头电流控制的写放大器
公开(公告)号：US6064261A
公开(公告)日：2000-05-16
申请号：US299187
申请日：1999-04-23
申请人： Anatoli B. Stein , Nahum Guzik , Mikhail Korenblioum
发明人： Anatoli B. Stein , Nahum Guzik , Mikhail Korenblioum
IPC分类号： G11B5/027 , G11B5/09 , H03F3/45
CPC分类号： G11B5/022 , H03F3/45479
摘要： A write amplifier is provided with one or more improved switching performance, low output common-mode voltage, and precise write head current control. A low output common-mode voltage is achieved using a combination of circuit components which limit the undesirable delivery of current from a differential pair of transistors used for switching, or steering, the current delivered to the write head. Additionally, a voltage source within the amplifier precisely controls the write current delivered to the differential pair. Toward that end, the introduction of operational amplifiers, resistors, and a transistor to provide a circuit wherein the current delivered to the write head by the voltage source is predominantly a function of a write current and a corresponding resistive network, comprised of the write head and resistors connected to the collectors of the differential pair, and wherein the write head current is substantially independent of the current used to perform switching through the differential pair itself. Furthermore, the switching of the differential pair is improved by tying the bases of the differential pair together and capacitively bypassing them to ground and connecting them to an adjustable voltage source, such that the voltage at the bases prevents overdrive of the differential pair of transistor. Additional resistors are also added to damp any remaining transients caused during the switching process.
摘要翻译：写放大器具有一个或多个改进的开关性能，低输出共模电压和精确的写头电流控制。使用电路组件的组合来实现低输出共模电压，所述电路组件限制了用于切换或转向传递到写头的电流的差分晶体管对的不期望的电流传递。此外，放大器内的电压源精确地控制传递到差分对的写入电流。为此，引入运算放大器，电阻器和晶体管以提供电路，其中由电压源传送到写入头的电流主要是写入电流和对应的电阻网络的功能，该电阻网络由写入头以及连接到差分对的集电极的电阻器，并且其中写入头电流基本上与用于通过差分对本身进行切换的电流无关。此外，差分对的开关通过将差分对的基极连接在一起并电容地绕过它们接地并将其连接到可调电压源来改善差分对的切换，使得基极处的电压防止差分对晶体管的过驱动。还添加了额外的电阻以阻止在切换过程中引起的任何剩余瞬变。

25. 发明授权

US6023145A Head and disk tester with a thermal drift-compensated closed-loop positioning system 有权
标题翻译：具有热漂移补偿闭环定位系统的头盘测试仪
公开(公告)号：US6023145A
公开(公告)日：2000-02-08
申请号：US295912
申请日：1999-04-21
申请人： Ufuk Karaaslan , Ilia Bokchtein , Anatoli Stein , Nahum Guzik , Alexander Varlakhanov
发明人： Ufuk Karaaslan , Ilia Bokchtein , Anatoli Stein , Nahum Guzik , Alexander Varlakhanov
IPC分类号： G11B21/08 , G11B5/455 , G11B5/55 , G11B5/596 , G11B21/10 , G11B5/58
CPC分类号： G11B5/455 , G11B5/5552 , G11B5/5565 , G11B5/596
摘要： The head/disk tester of the invention has a housing 43 that houses spindle 44 that rotatingly supports a magnetic disk 31. The housing supports a moveable carriage 30 that, in turn, supports a magnetic head 32. Positioning means 39 and 41 are used to move the carriage and the magnetic head across the magnetic disk. These positioning means include stepper motors that realize coarse positioning of the magnetic head, and a piezo actuator 37 that is used for fine positioning. Linear encoders 40 and 42 located at both sides of the carriage provide feedback information to a closed-loop positioning system that controls the piezo actuator. A set of special signals ("servo bursts") pre-written at a given track of the magnetic disk is used as an additional source of feedback information for the same closed-loop positioning system. This positioning system includes a servo analyzer 45 that reads and processes servo burst signals from the magnetic disk, and a position controller 49 that controls the piezo actuator. The controller contains two control loops: a proportional-integral-derivative (PID) loop and an additional servo burst loop. During any movement of the magnetic head to a prescribed command position, the servo burst feedback is turned off, and feedback from linear encoders is used by the PID loop to move the head. When the magnetic head reaches the prescribed command position, servo burst loop is turned on; it changes the command position of the PID loop in a way to keep the ratio of pre-written burst signals constant. As a result, the position of the magnetic head with respect to the data track remains the same for as long as necessary, even in unstable temperature conditions.
摘要翻译：本发明的头/盘测试器具有壳体43，其容纳旋转地支撑磁盘31的心轴44.壳体支撑可移动滑架30，滑动架30又支撑磁头32.定位装置39和41用于将滑架和磁头移动到磁盘上。这些定位装置包括实现磁头粗略定位的步进马达和用于精细定位的压电致动器37。位于滑架两侧的线性编码器40和42向控制压电致动器的闭环定位系统提供反馈信息。预先写在磁盘的给定轨道上的一组特殊信号（“伺服脉冲串”）用作相同闭环定位系统的附加反馈信息源。该定位系统包括从磁盘读取和处理伺服脉冲串信号的伺服分析器45以及控制压电致动器的位置控制器49。控制器包含两个控制回路：比例积分微分（PID）回路和附加的伺服脉冲串回路。在任何磁头移动到规定的指令位置时，伺服脉冲串反馈被关闭，PID回路使用线性编码器的反馈来移动磁头。当磁头达到规定的指令位置时，伺服脉冲串环路导通; 它以保持预写脉冲串信号的比例恒定的方式改变PID循环的命令位置。结果，即使在不稳定的温度条件下，磁头相对于数据轨道的位置也保持相同。

26. 发明授权

US6006614A Apparatus and method for improving dynamic characteristics of a fine-positioning mechanism in a magnetic head/disk tester 失效
标题翻译：用于改善磁头/磁盘测试仪中的精细定位机构的动态特性的装置和方法
公开(公告)号：US6006614A
公开(公告)日：1999-12-28
申请号：US44301
申请日：1998-03-19
申请人： Nahum Guzik , Ufuk Karaaslan , Cem Kilicci
发明人： Nahum Guzik , Ufuk Karaaslan , Cem Kilicci
IPC分类号： G11B5/012 , G11B5/455 , G11B21/02 , G11B21/10 , G01N17/00
CPC分类号： G11B5/012 , G11B5/455
摘要： An improved fine positioning mechanism in a magnetic head/disk tester includes a primary position actuator and a primary body that supports a read/write head to be tested, and an auxiliary body and auxiliary actuator. Both actuators operate contemporaneously and in mutually opposite directions. The masses of both bodies and the stiffnesses of both actuators are selected so that a ratio of the stiffness of the actuator to the mass of the body in the primary system is equal to a ratio of the stiffness of the actuator to the mass in the auxiliary system. In addition, the masses of both bodies and the expansion coefficients of both actuators are selected so that a product of the mass of the body with the expansion coefficient of the actuator in the primary system is equal to a product of the mass of the body with the expansion coefficient of the actuator in the auxiliary system. In this manner, forces operating on both bodies are equal in magnitude and opposite in direction and therefore counterbalance each other when the same control voltage is applied to both actuators. This, in turn, eliminates or reduces vibrations in the slide supporting the actuators and therefore the head-positioning settling time is significantly reduced.
摘要翻译：磁头/磁盘测试仪中的改进的精细定位机构包括主位置致动器和支撑待测试的读/写头的主体以及辅助主体和辅助致动器。两个执行器同时和相互相反的方向运行。两个致动器的质量和刚度被选择为使得致动器的刚度与主系统中的主体质量的比值等于致动器的刚度与辅助件中的质量的比率系统。另外，两主体的质量和两个致动器的膨胀系数被选择，使得主体的主体的膨胀系数与主体系中的致动器的膨胀系数的乘积等于体的质量与辅助系统中执行器的膨胀系数。以这种方式，在两个主体上操作的力在幅度上是相等的，并且在相同的控制电压被施加到两个致动器上时彼此相互平衡。这又反过来消除或减少支撑致动器的滑块中的振动，因此头部定位稳定时间显着减小。

27. 发明授权

US5932887A Apparatus for measuring the flying height and orientation of a magnetic head relative to a transparent medium based on frustrated total internal reflection 失效
标题翻译：用于基于沮丧的全内反射来测量磁头相对于透明介质的飞行高度和取向的装置
公开(公告)号：US5932887A
公开(公告)日：1999-08-03
申请号：US949880
申请日：1997-10-14
申请人： Nahum Guzik
发明人： Nahum Guzik
IPC分类号： G01B11/02 , G01B11/14 , G01B11/26 , G11B5/60 , G11B21/21 , G11B33/10 , G01N21/86
CPC分类号： G01B11/14 , G11B33/10 , G11B5/6005
摘要： The invention provides an apparatus for measuring the flying height and orientation of a magnetic head (54) relative to a transparent disk (20) based on both frustrated total internal reflection and total internal reflection. The apparatus comprises a housing (10) that mounts an electric motor (12) which rotationally supports the aforementioned disk. The disk (20) has a tapered lateral surface (20c) with light emitting means (22) such as a laser (24) installed on one side of the disk lateral surface and a flat light detecting means (30) on a side of the disk diametrically opposite to the laser. A second light detector (130) is disposed on the other side of the disk (20) from, and opposite the head (54). The light is emitted from the laser (24) and is directed to the disk (20) perpendicular to the tapered lateral surface (20c) of the disk (20). When the magnetic head (44) to be tested is absent, the light detecting means (30) shows an area of homogeneous intensity of the reflected light. When, however, the magnetic head (44) approaches to the surface (20a) of the disk and is supported during rotation of the disk at a flying height, i.e., on an air cushion, the proximity of the head frustrates the total internal reflection. As a result, the intensity of the reflected light sensed by the detector (38) is reduced. The degree of this reduction and that detected by detector (130) can be translated through appropriate electronic means and computer (40) into the value of the flying height.
摘要翻译：本发明提供了一种用于基于两个受阻的全内反射和全内反射来测量磁头（54）相对于透明盘（20）的飞行高度和取向的装置。该装置包括安装旋转地支撑上述盘的电动机（12）的壳体（10）。盘（20）具有锥形侧表面（20c），其具有安装在盘侧表面的一侧上的激光器（24）的发光装置（22）和平面光检测装置（30）圆盘与激光器完全相反。第二光检测器（130）从头部（54）的对面设置在盘（20）的另一侧上。光从激光器（24）发射并且被引导到与盘（20）的锥形侧表面（20c）垂直的盘（20）。当不存在要测试的磁头（44）时，光检测装置（30）示出反射光强度均匀的区域。然而，当磁头（44）接近盘的表面（20a）并且在盘的旋转期间（即，在气垫上）被支撑时，头部的接近度使整个内反射。结果，由检测器（38）感测的反射光的强度降低。可以通过适当的电子装置和计算机（40）将检测器（130）检测到的这种减小程度和检测器的程度转换成飞行高度的值。

28. 发明授权

US5677805A Apparatus for determining the dynamic position and orientation of a transducing head relative to a storage medium 失效
标题翻译：用于确定换能头相对于存储介质的动态位置和取向的装置
公开(公告)号：US5677805A
公开(公告)日：1997-10-14
申请号：US476626
申请日：1995-06-07
申请人： William P. Parker , Nahum Guzik , Edward Fredkin
发明人： William P. Parker , Nahum Guzik , Edward Fredkin
IPC分类号： G01B11/00 , G01B11/14 , G11B5/60 , G11B21/21 , G11B33/10 , G11B21/02
CPC分类号： G11B5/6005 , G01B11/14 , G11B33/10
摘要： An apparatus for determining the position and/or orientation of a transducing head positioned on one side of and close to a rotating transparent-core magnetic storage disk. Light is introduced into the disk to establish total internal reflection therein. A detector disposed on the other side of the disk opposite the head detects the intensity of light on the interior region of the disk. The detected intensity is representative of the separation of the head from the disk.
摘要翻译：一种用于确定位于和靠近旋转的透明芯磁存储盘的一侧上的换能头的位置和/或取向的装置。光引入光盘以在其中建立全内反射。设置在与头部相对的盘的另一侧上的检测器检测盘的内部区域上的光强度。检测到的强度代表磁头与磁盘的分离。

29. 发明授权

US5254946A Magnetic head and disk tester with head centrally mounted on radially-moving, rotatable platform that surrounds disk 失效
标题翻译：磁头和磁盘测试仪，磁头集中安装在围绕磁盘的径向移动的可旋转平台上
公开(公告)号：US5254946A
公开(公告)日：1993-10-19
申请号：US840527
申请日：1992-02-25
申请人： Nahum Guzik
发明人： Nahum Guzik
IPC分类号： G01R33/12 , G11B5/012 , G11B5/455 , G11B33/10
CPC分类号： G01R33/1207 , G11B33/10 , G11B5/012 , G11B5/455
摘要： A positioning device includes a base platform (100) which bears linear slide mechanisms (102 and 104). Stationary shafts (106 and 108) of the slide mechanisms are rigidly attached to the base platform. Sliding bushings (110 and 112) are mounted into a movable housing (124) whose motion is governed by a first stepper motor (136). The translation range of the housing is limited by a stop post (148) mounted onto the base platform. The housing supports a ball bearing (130), which comprises an outer race (132) and an inner race (134). The inner race is rigidly attached to the housing. The outer race supports a rotatable platform (150). The rotational motion of the outer race of the bearing is governed by a second stepper motor (154). The rotatable platform bears a mechanical arm (172) which holds a transducing head (180) centrally disposed with respect to the bearing. The transducing head can be placed at any desired radial position with respect to a disk (168) which is mounted onto a spindle (162) by imparting a specified displacement to the slider mechanisms via the first stepper motor. The necessary angular orientation of the transducing head with respect to the disk can be achieved by rotating the ball bearing via the second stepper motor.
摘要翻译：定位装置包括承载线性滑动机构（102和104）的基座平台（100）。滑动机构的固定轴（106和108）刚性地附接到基座平台。滑动衬套（110和112）安装到可移动的壳体（124）中，运动由第一步进电机（136）控制。外壳的平移范围由安装在基座上的止动柱（148）限制。壳体支撑包括外座圈（132）和内座圈（134）的滚珠轴承（130）。内圈刚性地固定在外壳上。外圈支撑可旋转平台（150）。轴承的外圈的旋转运动由第二步进马达（154）控制。可旋转平台具有机械臂（172），其保持相对于轴承居中布置的换能头（180）。换能头可以相对于通过经由第一步进电动机赋予滑块机构的特定位移而安装在主轴（162）上的盘（168）放置在任何期望的径向位置。可以通过经由第二步进电机旋转球轴承来实现换能头相对于盘的必要的角度定向。

30. 发明授权

US4958839A Disc clamp employing resilient cone for spreading balls 失效
标题翻译：圆盘夹具采用弹性锥体展开球
公开(公告)号：US4958839A
公开(公告)日：1990-09-25
申请号：US217875
申请日：1988-07-12
申请人： Nahum Guzik , Vinod Rao
发明人： Nahum Guzik , Vinod Rao
IPC分类号： G11B17/028
CPC分类号： G11B17/0282 , Y10T279/1054 , Y10T279/1091
摘要： A ball-type clamping mechanism for clamping computer hard disks in a disk tester for accurate measuring of the disk's parameters comprises a cup-shaped support (10) which is installed on a rotating part of the tester and serves to support a computer hard disk (20) which rests on the upper surface of the support. The support has a cylindrical opening (12) with a diameter equal to or slightly greater than the diameter of the disk opening. Slidingly inserted into the support (10) is a cylindrical retainer (26) which carries clamping balls (28) uniformly spaced from each other in a circumferential direction and located in recesses (30) formed in the side wall of the retainer. The balls have a diameter larger than the side wall of the retainer (26). A pull rod (40) passes through the central opening in the bottom wall of the support and carries a clamping cone (42) which is made from a resilient material softer than the material of the balls (28). When the rod is pulled down, a conical surface (50) of the clamping cone (42) pushes the balls radially outwardly into contact with the inner periphery of the hard disk, so that the disk is clamped. The number of balls exceeds three, so that a uniform clamping force is provided on each of the balls. Because the cone is made from a resilient material, the balls clamp the disk with a uniform force without the necessity of manufacturing the parts with accurate tolerances.
摘要翻译：用于将计算机硬盘夹持在盘测试器中用于精确测量盘的参数的球形夹持机构包括杯状支撑件（10），其安装在测试器的旋转部分上并用于支撑计算机硬盘 20），其位于支撑件的上表面上。支撑件具有直径等于或稍大于盘开口直径的圆柱形开口（12）。滑动地插入到支撑件（10）中的是圆柱形保持器（26），其沿圆周方向彼此均匀间隔地夹持夹紧球（28），并且位于形成在保持器的侧壁中的凹部（30）中。球具有比保持器（26）的侧壁大的直径。拉杆（40）通过支撑件的底壁中的中心开口并且承载由比球（28）的材料更软的弹性材料制成的夹紧锥（42）。当杆被拉下时，夹紧锥体（42）的锥形表面（50）径向向外推动球体与硬盘的内周接触，使得盘片被夹紧。球的数量超过三个，从而在每个球上设置均匀的夹紧力。由于锥体由弹性材料制成，所以球以均匀的力夹紧盘，而不需要制造具有精确公差的部件。

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