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1. 发明授权

US4680551A Method for homogenizing a static magnetic field over an arbitrary volume 失效
标题翻译：在任意体积上均匀化静磁场的方法
公开(公告)号：US4680551A
公开(公告)日：1987-07-14
申请号：US785140
申请日：1985-10-07
申请人： Matthew O'Donnell , Steven G. Karr , William D. Barber , Jish M. Wang , William A. Edelstein
发明人： Matthew O'Donnell , Steven G. Karr , William D. Barber , Jish M. Wang , William A. Edelstein
IPC分类号： A61B5/055 , A61B10/00 , G01R33/20 , G01R33/24 , G01R33/3875 , H01F7/20
CPC分类号： G01R33/3875 , G01R33/24
摘要： A method for minimizing the inhomogeneity of a static magnetic field, produced by a main magnet, over a selected arbitrary volume, by operation of a plurality N of shimming coils each independently producing an associated shimming magnetic field having an associated inhomogeneity which is a function of spatial location over that same volume, uses the steps of: measuring the magnitude of the main magnet field, in the absence of all shimming fields, at a plurality of locations X.sub.i upon the surface of an imaginary sphere enclosing the arbitrary volume; measuring the polarity and magnitude of each of the N shimming fields, with respect to the polarity and magnitude of a D.C. current flowing through the associated shimming coil, at the same plurality of locations X.sub.i upon the imaginary sphere surface; determining the weighted mean-square variation of the total field at each of another plurality of points Y.sub.i within the volume of said imaginary sphere; and (d) selecting the current magnitudes and polarities for each of the N shimming coils to provide each of the N associated shimming fields with magnitude and polarity to minimize the inhomogeneity of the main magnetic field in the arbitrary volume. The set of weighting coefficients may be selected to all be equal, or to emphasize at least one desired region of the arbitrary volume.
摘要翻译：一种用于通过操作多个N个匀场线圈来最小化由主磁体产生的静磁场在选定的任意体积上的不均匀性的方法，每个独立地产生相关联的匀场磁场，其具有相关的不均匀性，该相关的不均匀性是在相同体积上的空间位置使用以下步骤：在包围任意体积的虚拟球体的表面上的多个位置Xi处，在没有所有匀场的情况下测量主磁场的大小; 相对于流过相关联的调色线圈的直流电流的极性和幅度，在虚拟球体表面上相同的多个位置Xi处，测量每个N个匀场的每个的极性和幅度; 确定所述虚拟球体积内的另一多个点Yi中的每个点处的总场的加权均方差; 并且（d）为N个匀场线圈中的每一个选择当前幅度和极性，以提供N个相关联的匀场中的每一个具有大小和极性以最小化任意体积中的主磁场的不均匀性。加权系数集合可以被选择为全部相等，或者强调任意卷的至少一个期望区域。

2. 发明授权

US4382382A Multilevel liquid sensing system 失效
标题翻译：多层液体传感系统
公开(公告)号：US4382382A
公开(公告)日：1983-05-10
申请号：US284166
申请日：1981-07-17
申请人： Jish M. Wang
发明人： Jish M. Wang
IPC分类号： G01F23/24 , G01F23/00
CPC分类号： G01F23/243
摘要： A conductive multilevel liquid sensor uses conventional integrated circuits such as inverters and voltage comparators as signal detectors, and a flat cable having corrosion-resistant probe conductors of different lengths as the sensing probe assembly. The binary encoded outputs of the signal detectors identify the sensed liquid level. A continuous level control is realized by the addition of timing logic, and sensor operation range is improved by having the voltage at one comparator input be adaptive to the change in liquid conductivity.
摘要翻译：导电多电平液体传感器使用诸如逆变器和电压比较器之类的常规集成电路作为信号检测器，以及具有不同长度的耐腐蚀探针导体作为感测探头组件的扁平电缆。信号检测器的二进制编码输出识别检测到的液位。通过添加定时逻辑实现连续电平控制，通过使一个比较器输入端的电压适应于液体电导率的变化来提高传感器工作范围。

3. 发明授权

US4370661A Easily assembled transverse magnetic printing head 失效
标题翻译：轻松组装横向磁性印刷头
公开(公告)号：US4370661A
公开(公告)日：1983-01-25
申请号：US193398
申请日：1980-10-02
申请人： Ami E. Berkowitz , Joseph A. Lahut , Jish M. Wang
发明人： Ami E. Berkowitz , Joseph A. Lahut , Jish M. Wang
IPC分类号： G03G19/00 , H05K1/11 , G11B9/00
CPC分类号： G03G19/00 , H05K1/118
摘要： An easily assembled transverse magnetic printing head and method for making same are disclosed for use in a coincident current, matrix-driven, transverse printing head. In accordance with one embodiment of the present invention, digit lines pass through a recording gap in mirror image fashion as between adjacent word groupings. Similarly, the word line patterns are arranged on a printed circuit board in a zig-zag fashion. A feature common to both the word and digit line printed circuits, however, is the presence of a small expanse of circuit wiring unsupported by printed circuit substrate material through which a high permeability magnetic comb structure is inserted to form required recording gaps. The coincident current scheme is retained by driving the digit lines from alternating directions. The arrangement of the digit lines in the present invention permits the use of a planar printed circuit with no crossovers and therefore a circuit which is easily fabricated in a flexible, printed circuit design.
摘要翻译：公开了一种易于组装的横向磁性印刷头及其制造方法，用于重合电流矩阵驱动的横向印刷头。根据本发明的一个实施例，数字线以相邻的字组合之间的镜像形式通过记录间隙。类似地，字线图案以锯齿形的方式布置在印刷电路板上。然而，对于字线和数字线印刷电路共同的特征是存在不受印刷电路基板材料支撑的小量电路布线，通过该电路布线插入高磁导率磁梳结构以形成所需的记录间隙。通过从交替的方向驱动数字线来保持重合的电流方案。本发明中的数字线的布置允许使用没有分频器的平面印刷电路，因此可以容易地以柔性的印刷电路设计制造的电路。

4. 发明授权

US4342039A High resolution magnetic printing head 失效
标题翻译：高分辨率磁性印刷头
公开(公告)号：US4342039A
公开(公告)日：1982-07-27
申请号：US227863
申请日：1981-01-23
申请人： Jish M. Wang
发明人： Jish M. Wang
IPC分类号： G06K15/14 , G11B5/48 , H04N1/032 , H04N1/195 , G06F3/14
CPC分类号： H04N1/1951 , G06K15/14 , G11B5/488 , H04N1/0326 , H04N1/19505
摘要： In order to achieve higher resolution in printed data, separate magnetic printing head sub-assemblies are adjacently disposed with respect to each other. Each sub-assembly includes a high permeability magnetic comb structure with teeth protruding through elongated slots in a pair of flexible printed circuit boards. High resolution is achieved by a relative offset of the comb teeth so that the teeth of the comb in the second sub-assembly align with the gaps in between the comb teeth in the first sub-assembly.
摘要翻译：为了在打印数据中实现更高的分辨率，单独的磁性打印头子组件相对于彼此相邻设置。每个子组件包括具有通过一对柔性印刷电路板中的细长槽突出的齿的高磁导率磁梳结构。通过梳齿的相对偏移来实现高分辨率，使得第二子组件中的梳子的齿与第一子组件中的梳齿之间的间隙对准。

5. 发明授权

US4339760A Magnetic printing head having a high signal-to-noise ratio 失效
标题翻译：具有高信噪比的磁性打印头
公开(公告)号：US4339760A
公开(公告)日：1982-07-13
申请号：US241261
申请日：1981-03-06
申请人： Jish M. Wang , Richard O. McCary
发明人： Jish M. Wang , Richard O. McCary
IPC分类号： G03G19/00 , G01D15/12
CPC分类号： G03G19/00
摘要： The signal-to-noise ratio as measured by the ratio of the full select magnetic field levels to the half select magnetic field levels, is improved in a coincident current magnetic printing head by providing means for producing a bias magnetic field which is at least somewhat opposed to the signal magnetic fields.
摘要翻译：通过全选磁场电平与半选择磁场电平的比率测量的信噪比通过提供用于产生至少一些偏置磁场的装置而在一致的当前磁性打印头中得到改善与信号磁场相反。

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