公开(公告)号：US08196001B2

公开(公告)日：2012-06-05

申请号：US12613058

申请日：2009-11-05

Applicant: Michael H. Chen ,  Rajita Shrestha ,  James C. Alexander

Inventor： Michael H. Chen ,  Rajita Shrestha ,  James C. Alexander

IPC: H03M13/00

CPC classification number: G11B20/1833 ,  G11B2020/183 ,  G11B2020/1836

Abstract: Systems for identifying potentially erroneous and/or erased data are provided. Systems have a bit detector, an accumulator, and a data reconstruction processor. The bit detector assigns values to bits read in a data signal. The bit detector illustratively assigns multiple values to each of the bits. The accumulator accumulates a count of the multiple values assigned by the bit detector for each of the bits. The accumulator associates each bit with a particular value based at least in part on its accumulated count. The data reconstruction processor determines for each of the bits a confidence level of the particular value associated to it. The data reconstruction process sets flags for a portion of the bits. The flags identify the portion of the bits as possible erased or erroneous data. The flags are set based at least in part on the confidence levels of the portion of the bits.

Abstract translation: 提供用于识别潜在错误和/或擦除数据的系统。 系统具有位检测器，累加器和数据重建处理器。 位检测器为数据信号中读取的位分配值。 位检测器说明性地将多个值分配给每个位。 累加器累加由比特检测器为每个比特分配的多个值的计数。 该累加器至少部分地基于其累加的计数将每个位与特定值相关联。 数据重建处理器为每个位确定与其相关联的特定值的置信水平。 数据重建过程为一部分位设置标志。 这些标志标识可能被擦除或错误数据的位的部分。 至少部分地基于位的部分的置信水平来设置标志。

公开(公告)号：US07891080B2

公开(公告)日：2011-02-22

申请号：US11935711

申请日：2007-11-06

Applicant: James C. Alexander ,  Jason H. Laks

Inventor： James C. Alexander ,  Jason H. Laks

IPC: G11B5/127 ,  H04R31/00

CPC classification number: G11B19/048 ,  G11B5/455 ,  G11B5/483 ,  G11B5/6076 ,  Y10T29/49025 ,  Y10T29/49027 ,  Y10T29/49032 ,  Y10T29/49036 ,  Y10T29/49041

Abstract: A method for detecting head-disc contact is disclosed. The method comprises locating a head including a head positioning microactuator and at least one of a read transducer and a write transducer adjacent to a disc such that the head is in communication with the disc, monitoring an output signal from the head positioning microactuator of the head, and evaluating the output signal to determine if the head contacts the disc.

Abstract translation: 公开了一种用于检测头盘接触的方法。 该方法包括定位包括头部定位微致动器的头部和与盘相邻的读取换能器和写入传感器中的至少一个，使得头部与盘通信，监视来自头部的头部定位微致动器的输出信号 ，并且评估输出信号以确定磁头是否接触盘。

公开(公告)号：US07634706B1

公开(公告)日：2009-12-15

申请号：US11481078

申请日：2006-07-05

Applicant: Michael H. Chen ,  Rajita Shrestha ,  James C. Alexander

Inventor： Michael H. Chen ,  Rajita Shrestha ,  James C. Alexander

IPC: H03M13/43

CPC classification number: G11B20/1833 ,  G11B2020/183 ,  G11B2020/1836

Abstract: A system for enhancing the error correction capability of an error correction code (“ECC”) during error recovery operations accumulates, for respective bits, counts of the number of times the bits are detected as 1s in multiple re-reads of a data signal. The system then determines, based on the associated count, if a reconstructed bit should be considered a 1 or 0, or neither, that is, if the reconstructed bit should be considered erroneous, by comparing the count to a majority detection threshold and then to either an upper or a lower predetermined threshold that corresponds to the confidence with which the bit is reconstructed as a either a 1 or a 0. If the confidence is sufficiently low, that is, if the count falls below the upper threshold or above the lower threshold, the reconstructed bit is flagged as erroneous. After all of the bits are reconstructed, the system groups the bits into symbols to reproduce the ECC codeword, and sets erasure pointers that identify the locations of a predetermined number, s, of the symbols that are associated with the highest degree of uncertainty, that is, the largest numbers of flagged bits or, as appropriate, the largest numbers of flagged bits with the lowest confidence levels. The error correction operation then decodes the symbols in the identified locations as erasures. The system, using an (n, k) distance d Reed-Solomon ECC uses 2t=n−k redundancy symbols to correct the s erasures and up to 2 ⁢ t - s 2 errors.

Abstract translation: 用于在错误恢复操作期间增强纠错码（“ECC”）的纠错能力的系统针对各个比特，在数据信号的多次重新读取中，将比特的次数累计为1次。 然后，系统基于关联的计数确定重构的比特应当被认为是1或0，或者两者都不是，即如果重构的比特被认为是错误的，则通过将计数与多数检测阈值进行比较，然后比较 对应于将位重建为1或0的置信度的上限或下限预定阈值。如果置信度足够低，即如果计数低于上阈值或高于下阈值 阈值，重建的位被标记为错误。 在所有比特重构之后，系统将比特分组为符号以再现ECC码字，并且设置识别与最高不确定度相关联的符号的预定数目s的位置的擦除指针， 是最大数量的标记位，或者酌情是具有最低置信水平的最大标记位数。 然后，纠错操作将识别的位置中的符号解码为擦除。 使用（n，k）距离d Reed-Solomon ECC的系统使用2t = n-k冗余符号来校正擦除和高达2t-s 2误差。

公开(公告)号：US07256703B2

公开(公告)日：2007-08-14

申请号：US10918352

申请日：2004-08-16

Applicant: Kim Duvernell ,  Terence Reynard ,  James C. Alexander

Inventor： Kim Duvernell ,  Terence Reynard ,  James C. Alexander

IPC: G08B3/00

CPC classification number: B65G69/003 ,  B65G69/001 ,  B65G69/006 ,  B65G69/008 ,  B65G69/2876 ,  Y10T307/766

Abstract: A loading dock apparatus remote control is provided. Some embodiments of the invention include a zone specific remote control for loading dock apparatus. Some optional embodiments include a selector switch to select which apparatus the single set of controls will control. Other optional embodiments automatically select the apparatus to be controlled by the single set of controls. A method of operating loading dock apparatus using a remote control is also provided.

Abstract translation: 提供了一个装载码头装置遥控器。 本发明的一些实施例包括用于装载码头装置的区域专用遥控器。 一些可选实施例包括选择开关，用于选择单组控制将控制哪个装置。 其他可选实施例自动选择要由单组控制来控制的装置。 还提供了使用遥控器操作装载坞装置的方法。

公开(公告)号：US07131160B2

公开(公告)日：2006-11-07

申请号：US10854308

申请日：2004-05-27

Applicant: James C. Alexander ,  Richard Hoofard

Inventor： James C. Alexander ,  Richard Hoofard

IPC: E01D1/00

CPC classification number: B65G69/2835 ,  B65G69/2841

Abstract: A dock leveler for bridging the gap between a loading dock and the bed of a vehicle parked at the loading dock. The dock leveler is configured for installation on the top of the dock and is designed to rotate from a vertically-stored raised position to at least one lowered, operative position. In some embodiments, the dock leveler can be lowered either for normal operation so that the deck assembly rests on the bed of the vehicle or it can be lowered to accommodate an end-loading condition.

公开(公告)号：US5544381A

公开(公告)日：1996-08-13

申请号：US284248

申请日：1994-08-02

Applicant: James C. Alexander

Inventor： James C. Alexander

IPC: B65G69/28 ,  E01D1/00

CPC classification number: B65G69/2823

Abstract: A dock leveler having a deck-assembly, a first hydraulic cylinder to power said deck assembly to a raised position, lip mounted to said deck assembly, and a second hydraulic cylinder for powering said lip into an extended position. An hydraulic power circuit is coupled to the first and second hydraulic cylinders to control movement of said deck and lip. The hydraulic power circuit includes a pump to deliver fluid under pressure, a first valve operatively coupled to the pump to control fluid flow to the first hydraulic cylinder. A second valve is operatively coupled to the second hydraulic cylinder. An adjustable relief valve is coupled to the second valve to prevent a reduction of fluid pressure to the second hydraulic cylinder after the pump has supplied fluid under pressure through the second valve to extend the lip.

Abstract translation: 具有甲板组件的船坞调平器，用于将所述甲板组件驱动到升高位置的第一液压缸，安装到所述甲板组件的唇部，以及用于将所述唇缘供电到延伸位置的第二液压缸。 液压动力回路连接到第一和第二液压缸以控制所述甲板和唇缘的运动。 液压动力回路包括用于在压力下输送流体的泵，可操作地连接到泵以控制流体流向第一液压缸的第一阀。 第二阀可操作地联接到第二液压缸。 可调安全阀联接到第二阀，以防止泵在压力下通过第二阀提供流体以延伸唇缘之后降低到第二液压缸的流体压力。

公开(公告)号：US5459963A

公开(公告)日：1995-10-24

申请号：US167207

申请日：1993-12-16

Applicant: James C. Alexander

Inventor： James C. Alexander

IPC: E01F1/00 ,  E01F13/06 ,  E01F13/00

CPC classification number: E01F1/00 ,  E01F13/06

Abstract: A barrier for a loading dock having an opening in a wall having a dock leveler positioned in a floor of the loading dock adjacent said opening. The dock leveler has a horizontal position where traffic may cross to adjacent areas of the loading dock. A support is located along a side of the dock leveler. A deformable barrier arm is pivotedly connected to the support by a mounting for movement between a horizontal blocking position and a raised vertical position exposing the opening. The mounting has a pivotal connection to the support to permit the deformable barrier arm to move in a vertical arc for raising and lowering the arm and a loose connection to the barrier arm to permit relative motion between the barrier arm and the mounting upon the application of a horizontal load to the barrier arm.

Abstract translation: 用于装载基座的障碍物，其具有在墙壁上的开口，其具有定位在邻近所述开口的装载平台的地板中的船坞调平器。 码头调平器具有水平位置，其中交通可能越过装载码头的相邻区域。 支架位于码头调平器的一侧。 可变形的障碍臂通过安装件枢转地连接到支撑件，用于在暴露开口的水平阻挡位置和升高的垂直位置之间移动。 安装件具有与支撑件的枢转连接，以允许可变形的隔离臂以垂直的弧线移动以升高和降低臂，并且与阻挡臂的松动的连接件允许在施加了阻挡臂和安装件之间的相对运动 对屏障臂的水平负载。

公开(公告)号：US4974276A

公开(公告)日：1990-12-04

申请号：US306963

申请日：1989-02-06

Applicant: James C. Alexander

Inventor： James C. Alexander

IPC: B65G69/28

CPC classification number: B65G69/2841

Abstract: A hold-down device for a mechanical dock leveler which is spring loaded so that when the hold-down device is released the deck will rise and the lip will extend. When the deck is walked down, the hold-down device maintains the deck in contact with the truck bed. This is accomplished by means of the interaction and geometry between a brake actuating arm and a brake release arm and the associated pins. As the dock leveler is lowered, the perpendicular distance from an anchor pin to the center line of a slot in the brake actuating arm increases. This causes the brake actuating arm to move upward increasing tension on the brake band. The brake release arm moves and increases the braking force. As the dock leveler is raised the braking force is reduced. The leveler includes a two-stage safety leg with a guide bar attached to the safety leg stop. The guide bar limits free travel of the safety leg. The guide bar engages projecting tabs from each stage of the safety leg to require upward or free movement above a respective engagement position before the safety leg can move forward and re-engage the stop.

Abstract translation: 用于机械平台矫直机的压紧装置，其是弹簧加载的，使得当压紧装置被释放时，甲板将上升并且唇缘将延伸。 当甲板走下来时，压紧装置保持甲板与卡车底座接触。 这通过制动器致动臂和制动器释放臂与相关销之间的相互作用和几何形状来实现。 当船坞平整机降低时，从锚定销到制动执行臂中的槽的中心线的垂直距离增加。 这使得制动器致动臂向上移动增加制动带上的张力。 制动释放臂移动并增加制动力。 随着平台矫直机升高，制动力降低。 矫直机包括一个两级安全腿，带有连接到安全腿部的导杆。 导杆限制了安全腿的自由行程。 引导杆从安全腿的每个阶段接合突出片，以在安全腿向前移动并重新接合止动件之前要求在相应的接合位置上方向上或自由运动。

公开(公告)号：US4961241A

公开(公告)日：1990-10-09

申请号：US372977

申请日：1989-06-29

Applicant: James C. Alexander

Inventor： James C. Alexander

IPC: B65G69/28

CPC classification number: B65G69/2811

Abstract: A brake mechanism for a vertically storing dock leveler mounted on a carriage for lateral movement on rails relative to a dock surface. The brake is automatically actuated by means of an arm that bears against the leveler. When the leveler is lowered the arm rotates to urge a brake member into engagement with a rail thus preventing lateral movement of the carriage and leveler.

Abstract translation: 一种用于垂直存放码头调平器的制动机构，其安装在滑架上，用于在轨道上相对于码头表面横向移动。 制动器通过支撑在矫直机上的手臂自动启动。 当调平器下降时，臂旋转以促使制动构件与轨道接合，从而防止滑架和矫直机的横向移动。

公开(公告)号：US4928340A

公开(公告)日：1990-05-29

申请号：US315060

申请日：1989-02-24

Applicant: James C. Alexander

Inventor： James C. Alexander

IPC: B65G69/28

CPC classification number: B65G69/287

Abstract: A dock leveler having a rigid flat deck and a rigid hinge pin coupling the leveler to a loading dock or leveler frame element. The deck is supported by a series of spaced box beams, each one split longitudinally to provide the necessary torsional flexibility to allow a rigid hinge pin. The use of a box beam geometry still serves to provide the required load support for the deck.

Abstract translation: 具有刚性平板的船坞调平器和将调平器连接到装载底座或矫直机框架元件的刚性铰链销。 甲板由一系列间隔的箱梁支撑，每个纵梁分别纵向分开，以提供必要的扭转弹性，以允许刚性铰链销。 使用箱梁几何形状仍然用于为甲板提供所需的负载支撑。