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1. 发明授权

US06279845B1 Magnetic tape reel coupling 失效
标题翻译：磁带卷盘联轴器
公开(公告)号：US06279845B1
公开(公告)日：2001-08-28
申请号：US09660109
申请日：2000-09-12
申请人： Wayne R. Hemzacek , David T. Hoge , Joseph P. Falace , David C. Graves , Clark Janssen , Michael W. Johnson , Steven A. Bendson
发明人： Wayne R. Hemzacek , David T. Hoge , Joseph P. Falace , David C. Graves , Clark Janssen , Michael W. Johnson , Steven A. Bendson
IPC分类号： G11B2304
CPC分类号： G11B23/043 , G11B15/32 , G11B23/037 , G11B23/044 , G11B23/107
摘要： A coupling for driving a magnetic tape reel uses the interface between a flat surface on the coupling and datum pads on the reel to locate the reel. The coupling includes a drive ring with ring teeth located around a drive shaft. The ring teeth engage mating teeth on the tape reel. The coupling also includes a datum ring having an annular surface located about the drive shaft. The annular surface contacts datum pads on the tape reel to axially position the tape reel relative to the drive shaft.
摘要翻译：用于驱动磁带卷盘的联接器使用联接器上的平坦表面和卷轴上的基准垫之间的界面来定位卷轴。联轴器包括驱动环，驱动环具有位于驱动轴周围的环形齿。环形齿啮合磁带卷轴上的配对齿。联接器还包括具有围绕驱动轴定位的环形表面的基准环。环形表面接触磁带卷轴上的基准垫，以使磁带卷轴相对于驱动轴轴向定位。

2. 发明授权

US4580176A Adaptive equalization circuit for magnetic recording channels utilizing signal timing 失效
标题翻译：利用信号定时的磁记录通道的自适应均衡电路
公开(公告)号：US4580176A
公开(公告)日：1986-04-01
申请号：US553938
申请日：1983-11-21
申请人： David C. Graves , Richard C. Schneider , Volker Zimmermann
发明人： David C. Graves , Richard C. Schneider , Volker Zimmermann
IPC分类号： H03H21/00 , G11B5/035 , G11B20/10 , H04B3/04 , G11B5/02 , G11B5/09
CPC分类号： G11B20/10046 , G11B20/10009 , G11B5/035
摘要： An adaptive equalization circuit for magnetic recording channels which derives an error signal to change the equalizer compensation value from the timing of random signal data and provides continuous feedback compensation.
摘要翻译：一种用于磁记录通道的自适应均衡电路，其导出误差信号，以从随机信号数据的定时改变均衡器补偿值，并提供连续的反馈补偿。

3. 发明授权

US5425070A Nuclear fuel assembly insert alignment tool 失效
标题翻译：核燃料组件插入对准工具
公开(公告)号：US5425070A
公开(公告)日：1995-06-13
申请号：US279039
申请日：1994-07-22
申请人： James S. Gosnell , David C. Graves
发明人： James S. Gosnell , David C. Graves
IPC分类号： G21C19/32 , G21C19/00
CPC分类号： G21C19/32 , G21Y2002/601 , G21Y2004/304
摘要： Apparatus for engaging and aligning lower ends of rodlets, or pins, of a nuclear fuel assembly insert. The apparatus facilitates positioning the insert within guide tubes of a nuclear fuel assembly. The nuclear fuel assembly insert rodlet alignment apparatus includes a mounting rack for attachment to a reactor or spent fuel pool edge, a first fixed plate attached to the mounting rack's lower end, and a second sliding plate attached to the first fixed plate. The first and second plates are respectively provided with first and second comb structures each comprised of elongated, linear, pointed teeth arranged in a spaced manner along an edge of a generally flat plate. The lower end of a crank, or rotating shaft, is coupled to the sliding plate by means of suitable linkage permitting the sliding plate to be moved on the fixed plate between a first position wherein the two comb structures are non-overlapping and a second position wherein the two comb structures overlap. The fuel insert pins are first inserted into the fixed plate comb structure, with the sliding plate comb structure then moved into overlapping position with the first comb structure such that each pin is engaged and securely maintained in fixed position by adjacent pairs of teeth of the first and second orthogonally aligned comb structures to prevent misalignment and entanglement of the lower ends of the pins. The fuel assembly insert may then be pulled up into a conventional handling tool with the pins still aligned.
摘要翻译：用于接合和对准核燃料组件插入件的小棒或销的下端的装置。该装置有助于将插入件定位在核燃料组件的导管内。核燃料组件插入式小棒对准装置包括用于附接到反应堆或废燃料池边缘的安装架，附接到安装架的下端的第一固定板和附接到第一固定板的第二滑动板。第一和第二板分别设置有第一和第二梳形结构，每个梳状结构包括沿着大致平坦的板的边缘间隔布置的细长的线性尖齿。曲柄或旋转轴的下端通过合适的连接件联接到滑动板，允许滑板在固定板上移动在第一位置和第二位置之间，其中两个梳结构不重叠，第二位置其中两个梳结构重叠。燃料插入销首先插入到固定板梳状结构中，然后滑板梳状结构然后与第一梳状结构移动到重叠位置，使得每个销通过第一个梳状结构的相邻齿啮合并牢固地保持在固定位置和第二正交排列的梳结构，以防止销的下端的不对准和缠结。然后，燃料组件插入件可以被拉到常规的操作工具中，并且销仍然对齐。

4. 发明授权

US06194625B1 Alkylation by controlling olefin ratios 有权
标题翻译：通过控制烯烃比例进行烷基化
公开(公告)号：US06194625B1
公开(公告)日：2001-02-27
申请号：US09158278
申请日：1998-09-22
申请人： David C. Graves , Ken Edward Kranz , James Kevin Millard , Lyle Frederick Albright
发明人： David C. Graves , Ken Edward Kranz , James Kevin Millard , Lyle Frederick Albright
IPC分类号： C07C200
CPC分类号： C07C2/62 , C07C2527/054
摘要： Disclosed are various embodiments for alkylating olefins and isoparaffins in the presence of an acid to reduce and/or control acid consumption or maximize and/or control the octane number of the produced alkylate product. One embodiment includes alkylation by controlling the C3/iso-C5 olefin ratio to reduce acid consumption. Another embodiment includes alkylation of C3 and C5 olefins in separate alkylation zones to maximize alkylate octane number. Even another embodiment includes propylene alkylation followed by C4 and/or C5 olefin alkylation, with the spent propylene acid used in the C4 and/or C5 olefin alkylation. Still another embodiment includes alkylation of C3, C4 and C5 olefins in separate alkylation zones, with the spent propylene acid used in the C4 alkylation, and the spent butylene acid used in the C5 alkylation. Yet another embodiment includes alkylation by controlling the C3/C4 olefin ratio to maximize the octane number of the produced alkylate.
摘要翻译：公开了在酸存在下烷基化烯烃和异链烷烃以减少和/或控制酸消耗或最大化和/或控制所产生的烷基化产物的辛烷值的各种实施方案。一个实施方案包括通过控制C3 / iso-C5烯烃比率来烷基化以减少酸消耗。另一个实施方案包括在单独的烷基化区烷基化C3和C5烯烃以使烷基化辛烷值最大化。即使另一个实施方案包括丙烯烷基化，随后是C4和/或C5烯烃烷基化，在C4和/或C5烯烃烷基化中使用废丙烯酸。另一个实施方案包括在单独的烷基化区中烷基化C3，C4和C5烯烃，其中用于C4烷基化的废丙烯酸和用于C5烷基化的废丁烯酸。另一个实施方案包括通过控制C3 / C4烯烃比例使烷基化使所产生的烷基化物的辛烷值最大化。

5. 发明授权

US5432652A Servo and data format for magnetic tape having plural spaced-apart servo areas interleaved with data track areas having serpentine track scanning using any one of a plurality of number of concurrently accessed tracks 失效
标题翻译：具有多个间隔开的伺服区域的磁带的伺服和数据格式，该伺服区域与具有多个并行访问的轨道中的任何一个的具有蛇形磁道扫描的数据磁道区域交错
公开(公告)号：US5432652A
公开(公告)日：1995-07-11
申请号：US75625
申请日：1993-06-14
申请人： Wayne T. Comeaux , David C. Graves , Douglas W. Johnson
发明人： Wayne T. Comeaux , David C. Graves , Douglas W. Johnson
IPC分类号： G11B5/09 , G11B5/55 , G11B5/584 , G11B20/12
CPC分类号： G11B5/5508 , G11B5/584
摘要： A magnetic tape has three evenly spaced-apart longitudinally-extending servo track areas. Four equal-sized longitudinally-extending data track areas are disposed between said servo track areas and between longitudinal edges of the tape and one of said longitudinally-extending data track areas. For track following, all servo track areas are simultaneously sensed for producing one head positioning signal. Data tracks are arranged into four groups of tracks, one-half of the data tracks in each group are concurrently accessed. The data tracks on the tape are arranged in clusters. Each cluster has one track from each of the groups of tracks. Two laterally-adjacent track clusters constitute four data track wraps for serpentine scanning of data tracks. The concurrent track accessing respectively occurs in first and second halves of a data track wrap (there is a number of wraps equal to one half the number of track clusters). Each servo area indicates two lateral positions of the tape to the head. The lateral spacing between the lateral positions is equal to about a data track width. This arrangement makes the servo areas field writable. The magnetic head has a number of data write and read gaps equal to the number of clusters. A set of four servo gaps are interposed between four groups of write and read gaps and positioned to simultaneously sense all three servo track areas.
摘要翻译：磁带具有三个均匀间隔开的纵向延伸的伺服磁道区域。在所述伺服磁道区域之间以及磁带的纵向边缘和所述纵向延伸的数据磁道区域中的一个之间设置四个等大小的纵向延伸的数据磁道区域。对于跟踪跟踪，所有伺服磁道区域同时被检测以产生一个磁头定位信号。数据磁道被布置成四组磁道，每组中的一半数据磁道被同时访问。磁带上的数据轨道排成簇。每个群集具有来自每组轨道的一个轨道。两个横向相邻的轨道簇构成了用于数据轨迹的蛇形扫描的四个数据轨迹包。并发跟踪访问分别发生在数据轨道包裹的第一和第二半部（存在等于轨道簇数量的一半的卷数）。每个伺服区域表示磁带到头部的两个横向位置。横向位置之间的横向间隔等于数据轨迹宽度。这种布置使伺服区域可写。磁头具有等于簇数的多个数据写入和读取间隙。在四组写入和读取间隙之间插入一组四个伺服间隙，并且定位成同时感测所有三个伺服轨迹区域。

6. 发明授权

US5394280A Detecting a servo error on a magnetic tape and identifying extent and location of the detected servo error by linked control marks 失效
标题翻译：检测磁带上的伺服误差，并通过链接的控制标识识别检测到的伺服误差的程度和位置
公开(公告)号：US5394280A
公开(公告)日：1995-02-28
申请号：US75622
申请日：1993-06-14
申请人： Alex Chliwnyj , David C. Graves , Scott M. Fry , Pamela R. Nylander-Hill , Habib M. Torab , Will A. Wright
发明人： Alex Chliwnyj , David C. Graves , Scott M. Fry , Pamela R. Nylander-Hill , Habib M. Torab , Will A. Wright
IPC分类号： G11B20/12 , G11B5/008 , G11B5/584 , G11B15/04 , G11B15/087 , G11B20/18 , G11B21/08 , G11B5/09 , G11B5/596
CPC分类号： G11B21/088 , G11B15/04 , G11B15/087 , G11B5/00817 , G11B5/584
摘要： A magnetic tape drive simultaneously senses on a magnetic tape three evenly spaced-apart servo track areas for servoing a multi-track magnetic head to follow a concurrent set of data tracks on the magnetic tape. The data tracks are arranged into a plurality of track groups. Each track group has a first and second subgroup of data tracks. The first subgroup of tracks are scanned in a first relative motion of the magnetic tape and magnetic head as a forward direction (tape is being spooled from a supply tape reel). The second subgroup of tracks are scanned in a second relative motion of the magnetic tape and magnetic head that is opposite in direction to the first relative direction and is a forward direction of scanning. While writing data in any one of the plural track groups, a servo dropout affecting most of the servo track areas is detected and indicated as a servo error. Writing is aborted. The relative position of the magnetic tape and head is detected at both longitudinal ends of the servo dropout. A servo dropout block (SDB), a tape control block, is written at each longitudinal end of the servo dropout only in the group of tracks in which data are being written. The tape space between the two SDBs is termed a limited portion of the tape in which no recording is permitted.
摘要翻译：磁带驱动器同时在磁带上感测三个均匀间隔开的伺服磁道区域，用于伺服多轨磁头以跟随磁带上的一组数据轨道。数据轨道被布置成多个轨道组。每个轨道组具有第一和第二子数据轨道子组。轨道的第一子组以磁带和磁头作为向前方向的第一相对运动扫描（磁带从供带卷轴卷绕）。轨道的第二子组以与第一相对方向相反的磁带和磁头的第二相对运动扫描，并且是扫描的正向。当在多个磁道组中的任何一个中写入数据时，检测到影响大多数伺服磁道区域的伺服压差，并将其表示为伺服误差。写作中止。在伺服脱落的两个纵向端处检测磁带和磁头的相对位置。只有在正在写入数据的磁道组中，伺服压差块（SDB）（磁带控制块）被写入伺服压差的每个纵向端。两个SDB之间的磁带空间被称为不允许记录的磁带的有限部分。

7. 发明授权

US5265082A Rewritable media protectable as written-once-only media and system and method for use therewith 失效
标题翻译：可重写的媒体可以一次写入的媒体和系统及其使用方法进行保护
公开(公告)号：US5265082A
公开(公告)日：1993-11-23
申请号：US770378
申请日：1991-10-03
申请人： John J. Gniewek , David C. Graves
发明人： John J. Gniewek , David C. Graves
IPC分类号： G11B19/02 , G11B19/12 , G11B20/12 , G11B23/28 , G11B23/30 , G11B27/30 , G11B27/36 , G11B5/09
CPC分类号： G11B23/281 , G11B19/02 , G11B19/12 , G11B20/1205 , G11B27/3027 , G11B27/36 , G11B2020/10592 , G11B2220/218 , G11B2220/90
摘要： A system uses prevent and detect mechanisms to enable rewritable data storage media to be operated as a written-once-only media. A physical indication of the media casing serves as an indicator of the write-once-only status of the media. A watermark is magnetically recorded on the media at the factory with a portion of the mark detectable by the system and a portion only detectable by returning to an inspection station for verification. This protects against a complete erasure of all data from the media. A segment write status indication serves to indicate the write-once-only status of each segment of the written data. A portion of the written region, such as the preamble or control field of each segment, contains a status mark written randomly within the area as a status indication that the data was written once or multiple times within that segment. Three status mark areas in each segment write status region provides the minimum space overhead for achieving the desired degree of protection against overwrite or a pattern repetition.

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