公开(公告)号：EP0260420A3

公开(公告)日：1988-11-30

申请号：EP87111115

申请日：1987-07-31

Applicant: International Business Machines Corporation

Inventor： Block, Timothy Roy ,  Enstrom, Mark Richard ,  Luecke, Francis Stephen ,  Shidler, Karl Allen ,  Soderstrom, Ronald Lee

IPC: G11B05/55 ,  G11B21/08

CPC classification number: G11B5/5526

Abstract: In this system the light reflected back over the path (10a) to be measured is fed directly into a semiconductor laser (8a). As is commonly known, the introduction of reflected power through the front, or emitting, facet of the laser actually alters the power present in the laser with an attendant effect on the signal from a photosensor (15) usually located on the rear facet of the laser. The output signal from the photosensor associated with the laser has an asymmetric sawtooth (triangular) waveform. This is in contrast to the output signal from a conventional interferometer which has a sinusoidal waveform. The photosensor output signal is profoundly affected by the return beam. Also unexpectedly, the sawtooth output signal from the photosensor is an essentially linear signal over the range between adjacent fringes. That is, except for the transition at positive and negative peaks. As the path length (10a) of the reflected beam is increased or decreased, the sawtooth output signal changes in a direct linear relationship to the change in path length. This allows precise measurement of changes in distance less than the distance between adjacent fringes.

公开(公告)号：EP0197394A3

公开(公告)日：1988-11-02

申请号：EP86103855

申请日：1986-03-21

Applicant: International Business Machines Corporation

Inventor： Scranton, Robert Alan ,  Thompson, David Allen ,  Worthington, Thomas Kimber

IPC: G11B05/54 ,  G11B05/55 ,  H02K41/035

CPC classification number: G11B5/5521 ,  H02K41/035 ,  H02K41/0356

Abstract: 57 A linear disk actuator is disclosed incorporating a magnetic circuit for reducing stray magnetic fields in the region of the disks and recording heads of a magnetic recording disk system. The moving part of the actuator is provided with a plurality of coils mounted thereon, at least two of which are energised simultaneously and in magnetically opposing relationship to reduce the amplitude of the stray magnetic fields. Movement of the actuator is achieved by both energised coils interacting with a set of alternating poles positioned on the stationary part of the actuator.

Abstract translation: 公开了一种线性盘致动器，其结合有用于减少盘的区域中的杂散磁场的磁路和磁记录盘系统的记录头。 致动器的可移动部分设置有安装在其上的多个线圈，其中至少两个被同时通电并且以磁力相对的关系被激励，以减小杂散磁场的振幅。 致动器的运动通过与定位在致动器的静止部分上的一组交替磁极相互作用的通电线圈来实现。

公开(公告)号：EP0243164A3

公开(公告)日：1988-05-18

申请号：EP87303524

申请日：1987-04-22

Applicant: Archive Corporation

Inventor： Baheri, Hamid

IPC: G11B05/55 ,  G11B05/54 ,  G11B05/56

CPC classification number: G11B5/54 ,  G11B5/55

Abstract: A magnetic read/write head (14) is mounted on a carriage (20) having a bore (36) therein. The carriage (20) is slidable along a stationary guide rod (40) which extends into the bore (36). A lead screw (24) threads into a nut (76) which is keyed to the carriage (20) so that rotation of the lead screw (24) moves the carriage (20) along the guide rod (40). A torsion spring (52) engages the carriage (20) and provides a force to bias the carriage (20) so as to eliminate any undesired clearance between the carriage (20) and the nut (76) and between the carriage (20) and the guide rod (40). The force is applied at an angle relative to the axis of motion (48) of the carriage (20). As the carriage (20) moves, the spring (52) is deflected, causing the angle of the force to change and the amount of the force to change. The spring (52) is oriented so that the total force directed parallel to the axis of the motion (48) of the carriage (20) remains constant. The amount of the total force is predetermined to minimize vibration of the carriage (20) and head (14). The carriage (20) is guided by the guide rod (40), not the lead screw (24), so that misalignment of the lead screw (24) does not affect the positioning of the head (14). A second guide rod (42) extends into a halfbore (38) in the carriage (20) to prevent rotation of the carriage (20) about the lead screw (24).

公开(公告)号：EP0208280A3

公开(公告)日：1988-03-30

申请号：EP86109180

申请日：1986-07-04

Applicant: BASF Aktiengesellschaft

Inventor： Manzke, Klaus ,  Hammerschmitt, Peter ,  Weis, Hans-Joachim

IPC: G11B05/55 ,  G11B21/08

CPC classification number: G11B5/5521 ,  G11B5/4806

Abstract: Die Erfindung betrifft eine Positioniervorrichtung insbesondere für Magnetköpfe in bezug auf mindestens einen Magnetaufzeichnungsträger (6), wobei der Kopfarm (9) mit dem Kopfturm (10) einstückig ausgebildet und mit Aufnahmeeinrichtungen (16) für mindestens einen Magnetkopf (3) auf einem Federtragteil (7), insbesondere für jeweils ein vormontiertes Magnetkopfpaar versehen ist und wobei ein Auswechseln beliebiger Köpfe/Kopfpaare erreicht wird. Die Vorrichtung ist für Magnetspeichersyst eme, Fertigungsvorrichtungen usw. einsetzbar.

公开(公告)号：EP0240745A3

公开(公告)日：1987-11-19

申请号：EP87103291

申请日：1984-08-30

Applicant: MEMOREX CORPORATION

Inventor： El-sadi, Ibrahim

IPC: G11B21/10 ,  G11B21/08 ,  G11B05/596 ,  G11B05/55 ,  G11B20/12

CPC classification number: G11B21/085 ,  G11B5/59688 ,  G11B21/106

Abstract: Shown is a disk drive arrangement with servo- mechanism for controlling (thin-film) head position, etc.; the servo having a disk face dedicated to servo tracks, rendered in "Quad" code, with special timing indicia to separate position indicia. A feature is a technique for deriving and using "offset" values for an array of servo tracks.

Abstract translation: 显示了具有用于控制（薄膜）头位置等的伺服机构的磁盘驱动装置; 伺服具有专用于伺服轨道的盘面，以“Quad”代码呈现，具有特殊的时间标记以分离位置标记。 特征是用于导出和使用伺服轨道阵列的“偏移”值的技术。

公开(公告)号：EP0127058A3

公开(公告)日：1986-03-05

申请号：EP84105477

申请日：1984-05-14

Applicant: BASF Aktiengesellschaft

Inventor： Manzke, Klaus ,  Hammerschmitt, Peter ,  Schneider, Richard, Dr.

IPC: G11B05/55 ,  G11B21/02

CPC classification number: H01F7/145 ,  G11B5/5521

公开(公告)号：EP0117520A3

公开(公告)日：1985-08-07

申请号：EP84101838

申请日：1984-02-22

Applicant: International Business Machines Corporation

Inventor： Castagna, Joseph Thomas

IPC: H02K41/035 ,  G11B05/55 ,  H02K15/04

CPC classification number: H02K41/0356 ,  G11B5/5521 ,  H02K15/0457

Abstract: The winding (34) of a voice coil actuator (11) for a transducer positioning system of a disk data storage file, is wound on a composite layer of viscoelastic material (32) and an aluminium foil (33) wrapped around the core (30) of a bobbin. This construction minimizes vibrations in a direction parallel to the coil axis which tend to occur as a result of rapidly energizing the coil during the seek and track following modes of the transducer positioning system. The aluminium foil (33) functions to increase the shear deformation of the viscoelastic material (32) and its modulus of rigidity.

公开(公告)号：EP0085970A3

公开(公告)日：1984-08-01

申请号：EP83101083

申请日：1983-02-04

Applicant: Forestlane Co., Ltd.

Inventor： Fay, Larry

IPC: G11B05/55

CPC classification number: G11B5/5521

Abstract: A positioning mechanism for a floppy disk drive, read/ write head carriage is disclosed. The positioning mechanism converts the rotary motion of a stepper motor into the linear motion of the read/write head carriage by driving a cylindrical capstan and the carriage with a flexible, non-stretchable band. The band is wound around the capstan and fixed thereto with its opposite end extending from the capstan along the line which is tangent to the capstan and parallel to the path of movement of the carriage. The opposite ends of the band are rigidly attached to the carriage. Proper tension is maintained in the band by selcting the dimensions and materials of the positioning mechanism such that the system is thermally compensated.

Abstract translation: 公开了一种用于软盘驱动器，读/写头托架的定位机构。 定位机构通过用柔性的不可拉伸的带驱动圆柱形的绞盘和滑架将步进电动机的旋转运动转换成读/写头托架的直线运动。 带缠绕在绞盘上并固定到其上，其相对端从绞盘沿着与绞盘相切的线平行于支架的运动路径延伸。 带的相对端刚性地附接到托架。 通过选择定位机构的尺寸和材料来保持带中的适当张力，使得系统得到热补偿。

公开(公告)号：EP0090379A3

公开(公告)日：1984-02-01

申请号：EP83103000

申请日：1983-03-25

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Moriya, Mitsuro ,  Kanamaru, Toshiji ,  Nakata, Yoshinobu

IPC: G11B07/08 ,  G11B05/55 ,  G11B21/10

CPC classification number: G11B21/085 ,  G11B7/08517 ,  G11B7/08529 ,  G11B7/08541 ,  G11B21/083

Abstract: A data track searching device capable of switching between two modes; one being the rough searching mode in which a transducer is displaced at a high velocity to a desired track and the other being the fine searching mode which follows the rough searching mode and in which the transducer is displaced at a relative low velocity and positioned over the proper or desired track. The operating point of a tracking element is shifted or deviated as a result of the high-velocity displacement of the transducer in the rough searching mode so that stable searching cannot be ensured. According to the present invention, therefore, the acceleration of the transducer in the rough searching mode is detected and a signal representative of the thus detected acceleration is applied to the tracking element so that the shift or deviation of the operating point of the tracking element can substantially made nil.

公开(公告)号：EP0032231A3

公开(公告)日：1981-12-23

申请号：EP80108130

申请日：1980-12-22

Applicant: Siemens Aktiengesellschaft

Inventor： Kukreja, Jagmohan, Singh

IPC: G11B05/55

CPC classification number: G11B5/5521

Abstract: Die Erfindung bezieht sich auf eine Positioniereinrich tung für Disketten-Laufwerke (10), bei denen ein Magnetkopf (20) auf einem sich in radialer Richtung zu einer biegsamen Magnetscheibe verschiebbaren Wagen (16) angeordnet ist.
Der Wagen (16) wird durch eine mit einem Schnecken gewinde versehene Spindel (24) verschoben, die mit einer am Wagen (16) angeordneten Gewindemutter (26) in Eingriff steht. Ein Schrittmotor (22) treibt die Spindle (24) an. Der Schrittmotor (22) enthält einen als Permanentmagnet aus gebildeten Rotor (50), in dem koaxial die Spindle (24) befe stigt ist. Zur Lagerung der Spindel (24) und des Rotors (50) sind zwei Lager (38,40) vorgesehen, wovon das eine in der Nähe des Rotors (50) und das andere am freien Ende der Spindel (24) angeordnet ist.