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1. 发明授权

US07706102B1 Secure data storage 失效
标题翻译：安全数据存储
公开(公告)号：US07706102B1
公开(公告)日：2010-04-27
申请号：US11504376
申请日：2006-08-14
申请人： Vladimir Gershman , Ronald Dean , Bernard McGrath
发明人： Vladimir Gershman , Ronald Dean , Bernard McGrath
IPC分类号： G11B5/325 , G11B5/024
CPC分类号： G11B5/0245 , G06F21/80
摘要： A hard disk drive includes a chassis which supports a “sealed” housing containing a data storage magnetic disk, and read/write heads and actuator. The housing also contains an erasure device which generates a magnetic or other field or emanation for erasing the disk, so that the erasing field or emanation need not penetrate the sealed housing to effectuate erasure. A backup power supply provides power to the erasing device so that erasure can occur even in the absence of external power. A bus- or network-actuated arrangement couples power to the erasure device so that many hard drives may be simultaneously erased.
摘要翻译：硬盘驱动器包括支持包含数据存储磁盘的“密封”外壳以及读/写头和执行器的机箱。壳体还包含消除装置，其产生用于擦除盘的磁场或其他场或发射，使得擦除场或发射不需要穿透密封的壳体以实现擦除。备用电源为擦除装置提供电源，使得即使在没有外部电源的情况下也可能发生擦除。总线或网络驱动装置将电力耦合到擦除装置，使得可以同时擦除许多硬盘驱动器。

2. 发明授权

US5132860A Magnetic media erasure system 失效
标题翻译：磁介质擦除系统
公开(公告)号：US5132860A
公开(公告)日：1992-07-21
申请号：US421497
申请日：1989-10-13
申请人： Paul W. Von Stein
发明人： Paul W. Von Stein
IPC分类号： G11B5/024 , G11B5/325
CPC分类号： G11B5/325 , G11B5/024 , G11B5/0245
摘要： An erasure system for magnetic information storage media is disclosed by which magnetic media, such as computer, video and audio tapes, cassettes and discs, can be thoroughly erased. The system uses high energy product permanent magnets preferably positioned so that their poles repel one another to induce "bucking magnetic fields" having lines of force active in the three spatial planes and parallel or tangential to the recorded signal track on the media being erased. The DC magnetic field thus applied causes the DC erasure of the media. The AC erasure effect comes about through the relative movement of the media through fixed magnetic fields of opposite polarity, causing the magnetic media to be subjected to a reversing polarity of magnetic saturation. The magnet configurations can be adjusted for use on helically recorded magnetic media, in addition to cross-field and conventional recording techniques.
摘要翻译：公开了一种用于磁信息存储介质的擦除系统，通过该擦除系统可以彻底地擦除诸如计算机，视频和音频磁带，盒式磁带和磁盘的磁性介质。该系统使用高能产品永磁体，其优选地定位成使得它们的极彼此排斥以引起具有在三个空间平面中有效的力的“屈曲磁场”，并且与被擦除的介质上的记录信号轨道平行或相切。这样应用的直流磁场导致介质的直流擦除。 AC擦除效应是通过介质通过相反极性的固定磁场的相对运动而产生的，导致磁介质受到磁饱和反转极性的影响。除了跨场和常规记录技术之外，磁体配置可以调整用于螺旋记录磁介质。

3. 发明授权

US4146956A Method for manufacturing a multipolar erasing head 失效
标题翻译：制造多极擦除头的方法
公开(公告)号：US4146956A
公开(公告)日：1979-04-03
申请号：US831253
申请日：1977-09-07
申请人： Tatsuo Fujiwara
发明人： Tatsuo Fujiwara
IPC分类号： G11B5/325 , H01F13/00 , G11B5/42
CPC分类号： H01F13/006 , G11B5/325 , H01F13/003 , Y10T29/49004 , Y10T29/49034 , Y10T29/53165
摘要： Alternate S- and N-poles are disposed on a multipolar erasing head in the direction of a relative movement of the multipolar erasing head to a magnetic recording medium. The multipolar erasing head includes at least one region where the distances between adjacent magnetic poles of the same polarity are successively shortened in the direction for successively erasing the information recorded on the recording medium. A method and apparatus for manufacturing such an erasing head are also disclosed.
摘要翻译：交替的S和N极在多极擦除头上沿着多极擦除头相对于磁记录介质的相对移动的方向设置。多极擦除头包括至少一个区域，其中相同极性的相邻磁极之间的距离在连续擦除记录在记录介质上的信息的方向上被连续地缩短。还公开了一种用于制造这种擦除头的方法和装置。

4. 发明授权

US3624572A Magnets for generating spatially varying magnetic fields 失效
标题翻译：用于产生空间变化磁场的磁铁
公开(公告)号：US3624572A
公开(公告)日：1971-11-30
申请号：US3624572D
申请日：1970-04-30
申请人： AMPEX
发明人： MALLINSON JOHN C , STEELE CHARLES W
IPC分类号： G11B5/127 , G11B5/325 , H01F1/00
CPC分类号： G11B5/325 , G11B5/127
摘要： Magnet device for generating a spatially periodic magnetic field of decreasing magnitude, while employing a direct current DC source, or permanent magnets, as the field generating source of power. The invention contemplates at least one plurality of poles of selected configuration, adapted to receive a magnetic medium in magnetic bridging relation. A second plurality of poles of selected configuration may be disposed in confronting relation to the first plurality, in selected orientation therewith, defining therebetween a gap of selected dimensions and shape for receiving therethrough the magnetic medium. Accordingly, a magnetic medium passing along a preselected path adjacent the single plurality of poles, or through the gap between the confronting plurality of poles, experiences a spatially varying, symmetrical, magnetic field of selectable constant or varying magnitude. Several arrangements and various modifications are contemplated within the invention concepts to effect the desired operating parameters.

5. 发明授权

US11837263B1 Tape erase element included in a tape erase device to erase a tape medium 有权
公开(公告)号：US11837263B1
公开(公告)日：2023-12-05
申请号：US17820731
申请日：2022-08-18
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： David Harper , Hugo E. Rothuizen , Mark Alfred Lantz , Edwin Ralph Childers
IPC分类号： G11B5/024 , G11B5/008 , G11B5/325
CPC分类号： G11B5/024 , G11B5/00813 , G11B5/325
摘要： Provided are a tape erase element, tape erase device, and method for forming a tape erase element to erase content of a tape medium. The tape erase element comprises a housing forming a gap extending along a length of an outer surface of the housing. The gap extends from the outer surface of the housing to open into an inner space formed within the housing. A magnet is positioned within the inner space of the housing and having a surface extending across the gap. The magnet produces a magnetic flux that extends through a tape contact zone extending across a portion of the outer surface of the housing and the gap to erase content on the tape medium as the tape guide rollers guide the tape medium across the housing through the tape contact zone.

6. 发明申请

US20050243461A1 Data erasure apparatus, data erasure method and method for writing servo patterns on recording disk 失效
标题翻译：数据擦除装置，数据擦除方法以及在记录盘上写入伺服模式的方法
公开(公告)号：US20050243461A1
公开(公告)日：2005-11-03
申请号：US11119334
申请日：2005-04-28
申请人： Mitsuru Kitamura , Masahiko Katoh , Hitoshi Tamura , Hiroaki Uchiyama , Masashi Murayama , Migifumi Ikeda , Kazuo Sasaki , Shigeki Watabe
发明人： Mitsuru Kitamura , Masahiko Katoh , Hitoshi Tamura , Hiroaki Uchiyama , Masashi Murayama , Migifumi Ikeda , Kazuo Sasaki , Shigeki Watabe
IPC分类号： G11B5/024 , G11B5/325 , G11B5/596 , G11B19/20 , G11B21/10 , G11B17/02
CPC分类号： G11B19/20 , G11B5/0245 , G11B5/325 , G11B5/59633
摘要： Embodiments of the invention prevent a spindle motor from stopping rotation while data on a magnetic disk is being erased by using a permanent magnet. In one embodiment, data in the whole area of the magnetic disk is erased as a consequence of the magnetic disk rotating in the magnetic field of the permanent magnet located so as to face a part of the magnetic disk. A back yoke is located so as to face a base. The back yoke gives a magnetic force to the spindle motor in the opposite direction of the magnetic force of the erasing permanent magnet so that the fluid dynamic bearing spindle motor can retain the rotation as required without stopping rotation.
摘要翻译：本发明的实施例通过使用永磁体来防止主轴电机停止旋转，同时磁盘上的数据被擦除。在一个实施例中，磁盘的整个区域中的数据被擦除，因为磁盘在永久磁铁的磁场中旋转以便面对磁盘的一部分。背轭被定位成面向底座。后轭在与擦除永久磁铁的磁力相反的方向上向主轴电机施加磁力，使得流体动力轴承主轴电动机可以根据需要保持旋转而不停止旋转。

7. 发明授权

US4893208A Magnetic erase head with terminator magnets on the ends 失效
标题翻译：磁性擦拭头与终端磁铁在两端
公开(公告)号：US4893208A
公开(公告)日：1990-01-09
申请号：US191950
申请日：1988-05-09
申请人： Richard J. McClure
发明人： Richard J. McClure
IPC分类号： G11B5/024 , G11B5/325
CPC分类号： G11B5/024 , G11B5/325
摘要： An improved form of magnetic erase head is provided which utilizes, in a magnetic erase head, leading and trailing "terminators", which suppress stray fields emanating from leading and trailing magnets.
摘要翻译：提供了一种改进形式的磁性擦除头，其在磁性擦除头中利用前导和后部“终止器”，其抑制从前导磁铁和后磁体发出的杂散场。

8. 发明授权

US4628387A Read/write and trim erase magnetic head assembly 失效
标题翻译：读/写和修整磁头组件
公开(公告)号：US4628387A
公开(公告)日：1986-12-09
申请号：US464858
申请日：1983-02-08
申请人： Shinji Furuichi
发明人： Shinji Furuichi
IPC分类号： G11B5/23 , G11B5/265 , G11B5/325
CPC分类号： G11B5/2655
摘要： A magnetic head assembly for writing on and reading out data or signals from a magnetic medium such as a floppy disc, having a read-write magnetic head and eraser magnetic heads in combination. Control of the depth of the eraser gap in this magnetic head assembly is accomplished not by the eraser magnetic head core, but by the read-write magnetic head core.
摘要翻译：一种用于从诸如软盘的磁介质写入和读出数据或信号的磁头组件，其具有读写磁头和橡皮擦磁头的组合。该磁头组件中的橡皮擦间隙深度的控制不是由橡皮磁头磁芯，而是由读写磁头磁芯完成的。

9. 发明授权

US2690340A Sound recording or reproducing apparatus 失效
标题翻译：录音或重放设备
公开(公告)号：US2690340A
公开(公告)日：1954-09-28
申请号：US18578450
申请日：1950-09-20
申请人： EMI LTD
发明人： MILBURN HARRISON HENRY , WILLIAM DRISCOLL JOHN
IPC分类号： G11B5/325 , G11B5/596 , G11B17/028 , G11B19/20 , G11B25/04
CPC分类号： G11B19/20 , G11B5/325 , G11B5/596 , G11B17/028 , G11B25/043

10. 发明授权

US2617890A Erasing magnet assembly for magnetic recording and reproducing instruments 失效
标题翻译：擦除磁记录和再现仪器的磁体组件
公开(公告)号：US2617890A
公开(公告)日：1952-11-11
申请号：US19491650
申请日：1950-11-09
申请人： AMPRO CORP
发明人： EDMUND BARANY , MELVIN SACKTER
IPC分类号： G11B5/325
CPC分类号： G11B5/325

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