公开(公告)号：MX9605677A

公开(公告)日：1997-05-31

申请号：MX9605677

申请日：1996-11-19

Applicant: SONY CORP

Inventor： KIKUCHI SHUICHI

IPC: G11B23/033 ,  G11B05/012

Abstract: Un cartucho de discos incluye una placa central fijada a un lado interno de una caja de cartucho que aloja rotatoriamente un disco utilizado como un medio de registro. El cartucho de disco se monta a fin de quedar interpuesto entre el lado de la caja del cartucho y un extremo delantero del eje de huso de un impulsor de disco para evitar la abrasion o daño a la caja. La placa central se forma mediante un procedimiento de corte del rollo en hojas del material de la placa en capas. Este rollo de material de placas se forma con un nucleo de papel que tiene una capa adhesiva para montaje que se aplica a un lado del mismo, y una resina sintética super resistente a la abrasion aplicada al otro lado de la misma para ponerse en contacto con la orilla delantera del eje del huso.

公开(公告)号：EP0255036A3

公开(公告)日：1988-10-19

申请号：EP87110625

申请日：1987-07-22

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

Inventor： Kaida, Katsuhiko c/o Patent Division ,  Asai, Kenji

IPC: G11B20/10 ,  G11B05/012 ,  G11B05/596

CPC classification number: G11B20/10027 ,  G11B20/10 ,  G11B20/10009

Abstract: A recorded data reproducing apparatus according to this invention comprises a data pulse generation section (l0 to l5), a peak detection section (l7 to l9) and a control section (20 to 22). The data pulse generation section (l0 to l5) reads out data written on the cylinder of a recording medium on which a magnetic head is currently positioned. According to received gain data, the data pulse generation section (l0 to l5) amplifies a signal corresponding to the readout data, and selectively generates data pulse sequence based on the amplified signal. When the amplified signal corresponds to servo data, the peak detection section (l7 to l9) detects the peak value of the amplified signal. The control section (20 to 22) determines whether or not the magnitude of the detected peak value is nearly equal to a predetermined value. If the determination is nega­tive, the control section (20 to 22) refers to a gain data table to determine a change amount of the gain data, and supplies the gain data updated based on the change amount to the data pulse generation section (l0 to l5).

公开(公告)号：EP0183412A3

公开(公告)日：1987-09-16

申请号：EP85308122

申请日：1985-11-07

Applicant: Ing. C. Olivetti & C., S.p.A.

Inventor： De Marco, Giuliano ,  Fehl, Alessandro

IPC: G11B05/02 ,  G11B15/12 ,  G11B05/48 ,  G11B05/265 ,  G11B05/012 ,  G11B05/55

CPC classification number: G11B5/012 ,  G11B5/02 ,  G11B5/2655 ,  G11B5/488 ,  G11B5/4886 ,  G11B15/12

Abstract: Apparatus for recording and reproducing data on a magnetic recording medium (27) having a plurality of recording tracks (29) comprises a magnetic head (32) and a mechanism which selectively positions the head (32) with respect to the tracks (29) of the magnetic medium (27). The head has at least two gaps which are of different lengths and which can be selected one at a time for reading and/or recording data on the magnetic recording medium (27). A control circuit controls the positioning mechanism to move the head with respect to the magnetic recording medium by a distance which depends on the gap selected. The packing density of tracks on the recording medium determines which gap is selected for use.

公开(公告)号：EP0110511A3

公开(公告)日：1985-08-28

申请号：EP83305713

申请日：1983-09-26

Applicant: DYSAN CORPORATION

Inventor： Winkler, James Leaird ,  Juracich, John Gerald

IPC: G11B23/28 ,  G11B05/012 ,  G11B05/02

CPC classification number: G11B20/00086 ,  G11B5/00 ,  G11B5/012 ,  G11B19/02 ,  G11B20/00586 ,  G11B20/00659 ,  G11B20/00949 ,  G11B23/281 ,  G11B33/10 ,  G11B2020/10916

Abstract: @ A technique for enabling authentication of a magnetic memory disk. Predetermined portions of preselected tracks on the disk recording surface are deliberately removed and the locations of the modified portions are recorded, along with an initial program routine. The portions are alternatively removed by mechanically abrading the recording surface using a stylus, by embossing the preselected portions and applying an abrasive member to the embossed raised surfaces, by burning off the portions with a laser, or by chemical etching. When the disk is inserted into a drive, an initial program routine recorded on the disk causes the drive transducer to seek the pretreated portions and attempt a write and subsequent read operation. A successful write/read operation indicates a counterfeit copy. This indication may be used to signal the operator or erase the entire program from the disk.

公开(公告)号：EP0220812A3

公开(公告)日：1988-11-09

申请号：EP86306639

申请日：1986-08-28

Applicant: Rodime PLC

Inventor： Macleod, Nigel

IPC: G11B05/012

CPC classification number: G11B33/121 ,  G06F3/0601 ,  G06F3/0607 ,  G06F3/0625 ,  G06F3/0658 ,  G06F3/0674 ,  G06F2003/0692 ,  G11B5/012 ,  G11B20/10 ,  G11B25/043 ,  Y02D10/154

Abstract: A high capacity computer disk drive system operating a micro-hard disk drive is disclosed in which the hard disk rotates at a speed of approximately 2746 rpm and in which the data received from the host computer for storage on the hard dick is converted to 2,7 RLL coding prior to being written onto the disk. The disk drive system has a formatted data storage capacity in excess of 10 MB and an unformatted digital information storage capacity in excess of 12.5 MB, using both sides of the disk. The micro-hard disk drive system is connected to a host computer using a Small Computer Systems Interfaces (SCSI) which eliminates the need to provide additional disk controller hardware and software in the computer. The micro-Winchester disk drive system is particularly suited to meet the needs of a portable computer system.

公开(公告)号：EP0205305A3

公开(公告)日：1988-01-07

申请号：EP86304227

申请日：1986-06-03

Applicant: CANON KABUSHIKI KAISHA

Inventor： Sakata, Tsuguhide ,  Kimura, Norio ,  Taguchi, Tomishige ,  Takei, Masahiro

IPC: G11B20/10 ,  G11B05/012 ,  G11B20/18

CPC classification number: H04L7/046 ,  G11B20/10 ,  G11B20/1251 ,  G11B2020/10537 ,  G11B2020/10546 ,  G11B2220/2508 ,  H04L7/044 ,  H04L25/069

Abstract: A data transmission system and apparatus used for recording on a recording medium an audio signal, compressed in time base with a predetermined compression ratio, together with a data signal for reproduction of the audio signal. The data signal is composed of serial data of bits. A dummy bit is provided before the head bit of the serial data with the dummy bit being in inverted relation to the head bit. A detection system and apparatus for detection of the data transmitted by the data transmission system, and a recording medium on which signals are recorded according to the data transmission system are disclosed.

公开(公告)号：EP0168660A3

公开(公告)日：1987-11-25

申请号：EP85107553

申请日：1985-06-19

Applicant: KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO

Inventor： Fujishige, Sadao

IPC: G11B25/04 ,  G11B19/20 ,  G11B33/06 ,  G11B05/012

CPC classification number: G11B19/20 ,  G11B25/043 ,  G11B33/06

Abstract: A magnetic recording/reproducing apparatus of small size, small weight, and suitable for incorporation into a child's toy or the like. A magnetic disc is supported on a shaft, the latter being driven rotationally by a wind-up spring. A governor is provided for controlling the releasing force of the spring to thereby cause the disc to be rotated at a constant speed. A magnetic head is moved linearly and radially along the disc in synchronism with the rotation of the disc supporting shaft and in sliding contact with the disc. A spring-biased mode changeover member is provided for selecting between the recording and reproducing modes, the mode changeover member being normally urged to the reproducing mode position.

Abstract translation: 一种体积小，重量轻，适合装入儿童玩具等的磁记录/重放装置。 磁盘支撑在一个轴上，轴由一个卷绕弹簧旋转驱动。 提供调速器用于控制弹簧的释放力，从而使盘以恒定的速度旋转。 与磁盘支撑轴的旋转同步并且与磁盘滑动接触，磁头沿着磁盘线性地径向移动。 提供弹簧偏置的模式转换部件，用于在记录和再现模式之间进行选择，模式转换部件通常被推到再现模式位置。

公开(公告)号：EP0108207A3

公开(公告)日：1985-05-22

申请号：EP83108277

申请日：1983-08-23

Applicant: International Business Machines Corporation

Inventor： Quist, Frederick Fenn, Jr. ,  Steinbrecher, Marc Lawrence

IPC: G11B05/55 ,  G11B05/56 ,  G11B05/012

CPC classification number: G11B5/5521

Abstract: A flexible disk drive in which the head (10) moves in an arc (24), as the head is selectively moved to access the data at the various concentric data tracks (23) of a disk. Concomitant with this approximate arcuate movement, the head is azimuth-rotated, such that its gap has a predefined, optimum azimuth orientation to each of the individual disk tracks, for example, the head's gap is normal to the track's center line at each head position.

公开(公告)号：EP0196605A3

公开(公告)日：1988-03-30

申请号：EP86104099

申请日：1986-03-25

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

Inventor： Okamura, Hiroshi c/o Patent Division ,  Kusunoki, Masahiro c/o Patent Division ,  Saito, Toshiya c/o Patent Division ,  Ohashi, Hiroshi c/o Patent Division

IPC: G11B05/127 ,  G11B05/265 ,  G11B05/10 ,  G11B05/48 ,  G11B05/012 ,  G11B05/29

CPC classification number: G11B5/2654 ,  G11B5/012 ,  G11B5/10 ,  G11B5/127 ,  G11B5/4886

Abstract: A magnetic head assembly (32) comprising first and second core assemblies (37, 39) of different types and properties. The first core assembly (37) is of a leading erase type for the perpendicular magnetic recording system, while the second one (39) is of a tunnel erase type for the longitudinal magnetic recording system. These core assemblies (37, 39) are arranged on either side of a slider groove (36). When used with the dopble-sided recording system, they are both located on one side of the alider groove.

Abstract translation: 一种磁头组件（32），包括不同类型和特性的第一和第二芯组件（37,39）。 第一核心组件（37）是用于垂直磁记录系统的主要擦除类型，而第二核心组件（37）是用于纵向磁记录系统的隧道擦除类型。 这些核心组件（37,39）布置在滑块槽（36）的任一侧上。 当与双面记录系统一起使用时，它们都位于锯齿槽的一侧。

公开(公告)号：EP0186768A3

公开(公告)日：1987-09-30

申请号：EP85114645

申请日：1985-11-18

Applicant: Nixdorf Computer Aktiengesellschaft

Inventor： Bogdanski, Michael

IPC: G11B33/10 ,  G11B23/50 ,  G11B20/18 ,  G11B05/012 ,  G01N21/88 ,  G02B27/02 ,  G02B23/24

CPC classification number: G11B23/505 ,  G11B33/10