公开(公告)号：US07009409B2

公开(公告)日：2006-03-07

申请号：US10191155

申请日：2002-07-09

申请人： Neil R. Davie ,  E. Michael Coffey

发明人： Neil R. Davie ,  E. Michael Coffey

IPC分类号： G01R27/26

CPC分类号： F16J15/064 ,  F16J15/061 ,  F16L23/167 ,  F16L2201/30

摘要： A determination is made of the integrity of a gasket seal between two mating flange faces using capacitance measurement as an indication of the spacing between the flanges and thus the amount of gasket compression. The capacitance measurement can be made between a capacitor plate carried by the gasket and at least one of the flanges which serves as another capacitor plate. A capacitance-measuring instrument connected to the plates provides a measured capacitance signal that can be provided to a signal-processing instrument such as a personal computer. Further, the personal computer can be linked to a remote data center over a communications link for the transfer of gasket compression data.

公开(公告)号：US06752024B2

公开(公告)日：2004-06-22

申请号：US10191090

申请日：2002-07-09

申请人： Neil R. Davie ,  E. Michael Coffey

发明人： Neil R. Davie ,  E. Michael Coffey

IPC分类号： G01B716

CPC分类号： F16K37/0041 ,  F16K41/02 ,  G01L1/142 ,  G01L1/144

摘要： A thin flat disk-like capacitive load sensor of layered sandwich construction having a central opening and a circular outer periphery for installation above a packing follower or beneath the packing follower or packing gland. The load sensor has a thin first and second insulating outer layer between which an inner layer is secured. The inner layer is formed of dielectric material having a known dielectric constant, a first face having at least one thin electrically conductive circular ring surrounding the central opening in coaxial radially spaced relation, and a second face having a thin electrically conductive circular ring surrounding said central opening in coaxial radially spaced relation. The inner and outer layers contain electrical conductors engaged with respective electrically conductive circular rings on the opposed faces that are adapted to be connected with an electrical measurement apparatus. As the inner layer is compressed the spacing between the electrically conductive rings on the opposed faces is decreased such that compressive force on the packing can be measured as a function of the change in capacitance of the sensor. Proper compression of the padding can be achieved by monitoring during installation. Follow-up sampling or continuous measurement of packing compression provides early detection prior to packing failure to allow corrective action.

摘要翻译： 具有中心开口和圆形外周边的层状夹层结构的薄平板状电容式负载传感器，用于安装在填料随动体之下或填料随动体或填料压盖下方。 负载传感器具有薄的第一和第二绝缘外层，在其之间固定有内层。 内层由具有已知介电常数的电介质材料形成，第一面具有至少一个以同轴径向隔开的关系围绕中心开口的薄导电圆环，第二面具有围绕所述中心的薄导电圆环 以同轴径向间隔的关系开口。 内层和外层包含与相对面上相应的导电圆环接合的电导体，其适于与电测量装置连接。 当内层被压缩时，相对面上的导电环之间的间距减小，使得可以测量作为传感器的电容变化的函数的包装上的压缩力。 可以通过在安装过程中进行监控来实现衬垫的正确压缩。 后续采样或连续测量包装压缩在包装失败之前提供早期检测，以允许纠正措施。

公开(公告)号：US4734900A

公开(公告)日：1988-03-29

申请号：US855560

申请日：1986-04-25

申请人： Neil R. Davie

发明人： Neil R. Davie

IPC分类号： H03K5/00 ,  G11B5/09 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  H03M5/08 ,  H04L7/033 ,  H04N5/76

CPC分类号： H03M5/08 ,  H04L7/033 ,  G11B5/09

摘要： Width restoring to eliminate unintended width variations in pulse width modulated data in combination with a phase lock loop allows pulse width modulated data in high density optical recordings. The width restoration is accomplished by detecting the timing relationship of the leading and trailing edges of pulses relative to expected timing for the leading and trailing edges. Expected time is derived from a phase locked loop or the original write signal. The detected timing is compared to the expected timing and the timing of the leading and trailing edge signals is corrected. Either analog or digital width correction techniques are used. Width restoration may be used while reading data or while writing the data.

摘要翻译： 宽度恢复以消除脉冲宽度调制数据中的无意的宽度变化与锁相环相结合，允许高密度光学记录中的脉宽调制数据。 通过检测脉冲的前沿和后沿相对于前沿和后沿的预期定时的定时关系来实现宽度恢复。 预期时间来自锁相环或原始写入信号。 将检测到的定时与期望的定时进行比较，并校正前沿和后沿信号的定时。 使用模拟或数字宽度校正技术。 读取数据或写入数据时可以使用宽度恢复。

公开(公告)号：US4631706A

公开(公告)日：1986-12-23

申请号：US672559

申请日：1984-11-19

申请人： Glenn D. Batalden ,  Duane W. Baxter ,  Neil R. Davie

发明人： Glenn D. Batalden ,  Duane W. Baxter ,  Neil R. Davie

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/125 ,  G11B7/13 ,  G11B19/04 ,  G11B27/36 ,  G11C13/00

CPC分类号： G11B7/126 ,  G11B19/04 ,  G11B27/36 ,  G11B7/0045 ,  G11B7/13

摘要： An optical file system in which a command to store data results in a write operation in the next available storage position. A single optical path is used for both reading and writing. By dividing the detector in two equal parts along the direction of relative movement, it is possible to determine whether data has been written at a position which is in advance of the center of the area viewed by the detector. The write operation is conditioned on the output of the first part of the detector. Since the first part of the detector gives advance warning on the status of the oncoming data position, it is possible to switch from reading to writing without the requirement for a wasted revolution or wasted space. By dividing the signal resulting from a change of reflectance sensed during a write operation by a measure of the intensity of the write laser a read signal free of the write modulation is obtained.

摘要翻译： 其中存储数据的命令导致下一个可用存储位置的写入操作的光学文件系统。 单一光路用于读写。 通过沿着相对移动方向将检测器分成两个相等的部分，可以确定数据是否已经被写入位于由检测器观察的区域的中心之前的位置。 写入操作根据检测器的第一部分的输出。 由于检测器的第一部分对即将到来的数据位置的状态提供预警，可以从读取切换到写入，而不需要浪费革命或浪费空间。 通过将在写入操作期间感测的反射率的变化产生的信号除以写入激光器的强度的测量，获得了没有写入调制的读取信号。

公开(公告)号：US4144539A

公开(公告)日：1979-03-13

申请号：US796633

申请日：1977-05-13

申请人： Neil R. Davie ,  Joseph C. Lambiotte

发明人： Neil R. Davie ,  Joseph C. Lambiotte

IPC分类号： H04N1/23 ,  B41J2/44 ,  G03G15/04 ,  G06K15/12 ,  H04N1/053 ,  H04N1/113 ,  H04N1/12 ,  H04N1/29 ,  H04N1/407 ,  G01D15/14

CPC分类号： H04N1/407 ,  G06K15/1214 ,  G06K15/1219 ,  H04N1/053 ,  H04N1/29 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0471 ,  H04N2201/04768

摘要： In a xerographic printer wherein an acousto-optic modulator is used to derive a deflected first order beam of electromagnetic power which raster scans a charged photoconductor to leave a selectively discharged latent image area bordered by a discharged border area; power contents of said first order beam is maintained constant by adjusting the efficiency of the acousto-optic modulator with a closed loop electrical control system. The efficiency of the acousto-optic modulator is adjusted only when the beam is scanning the border area of the photoconductor.

摘要翻译： 在静电印刷机中，其中使用声光调制器来导出偏转的一阶电磁波束，其光栅扫描带电的光电导体以留下由排出的边界区域界定的选择性排出的潜像区域; 通过用闭环电气控制系统调节声光调制器的效率，所述一级光束的功率内容保持恒定。 只有当光束扫描光电导体的边界区域时才调整声光调制器的效率。

公开(公告)号：US4949196A

公开(公告)日：1990-08-14

申请号：US175171

申请日：1988-03-30

申请人： Neil R. Davie ,  Martin A. Hassner ,  Thomas D. Howell ,  Razmik Karabed ,  Paul H. Siegel

发明人： Neil R. Davie ,  Martin A. Hassner ,  Thomas D. Howell ,  Razmik Karabed ,  Paul H. Siegel

IPC分类号： H03M7/14 ,  G06T9/00 ,  G11B20/14 ,  H03M5/14

CPC分类号： H03M5/145 ,  G06T9/005

摘要： This disclosure concerns for generating asymmetrically constrained run-length-limited encoded data from a serialized binary string of 1's and 0's. The method comprises the steps of encoding the input data bits using a run-length-limited constraint in the form of M/N (d,k), where M is the number of input data bits, N is the number of output bits associated therewith, d is the minimum number of 0 data bits between adjacent data bit 1's, and k is the maximum number of 0 data bits between adjacent 1's; and alternating the values of d and k between a set (d.sub.1, k.sub.1) and a set (d.sub.2, k.sub.2), respectively, where d.sub.1 .noteq.d.sub.2. The apparatus comprises means for generating N output data bits in response to M input data bits and for generating data bit 0's between data bit 1's based upon a run-length-limited coding constraints (d.sub.1, k.sub.1) and (d.sub.2, k.sub.2), where constraints (d.sub.1, k.sub.1) and (d.sub.2, k.sub.2) apply alternately to runs of zeroes between output data ones. Fractional numerical values of d.sub.1 and d.sub.2 can be employed in the method or apparatus.

摘要翻译： 本公开涉及从1和0的串行化二进制串生成不对称约束的游程长度限制编码数据。 该方法包括以M / N（d，k）形式的游程限制约束对输入数据比特进行编码的步骤，其中M是输入数据比特数，N是相关联的输出比特数 因此，d是相邻数据位1之间的0个数据位的最小数量，k是相邻1之间的0个数据位的最大数量; 并且分别在集合（d1，k1）和集合（d2，k2）之间交替d和k的值，其中d1 NOTEQUAL d2。 该装置包括用于响应于M个输入数据位产生N个输出数据位并用于基于游程长度限制编码约束（d1，k1）和（d2，k2）在数据位1之间产生数据位0的装置，其中 约束（d1，k1）和（d2，k2）交替应用于输出数据之间的零运行。 d1和d2的分数值可以在该方法或装置中使用。

公开(公告)号：US4847824A

公开(公告)日：1989-07-11

申请号：US135797

申请日：1987-12-21

申请人： Neil R. Davie

发明人： Neil R. Davie

IPC分类号： G11B11/10 ,  G11B11/105 ,  H03K17/78

CPC分类号： G11B11/10595 ,  G11B11/10515

摘要： A magneto-optical player employs a differential readback circuit. The differential signal output of the readback circuit is low pass filtered. The filtered signal is converted to a single-ended signal and applied to a field effect transistor (FET). The FET is connected between one of the differential inputs of the readback circuit and a reference potential. The single-ended signal controls the FET to variably attenuate one side of the differential signal for reducing noise induced into the readback signal from diverse sources.