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184 条记录 (耗时 0.042 秒)

    Enhancement of flow mixing by a frequency tunable cavity
    134.
    发明授权
    Enhancement of flow mixing by a frequency tunable cavity 失效
    通过频率可调谐腔增强流动混合

    公开(公告)号：US5520459A

    公开(公告)日：1996-05-28

    申请号：US273031

    申请日：1994-06-30

    申请人： Kenneth H. Yu ,  Klaus C. Schadow ,  Robert A. Smith

    发明人： Kenneth H. Yu ,  Klaus C. Schadow ,  Robert A. Smith

    IPC分类号： B01F3/02 ,  B01F3/04 ,  B01F5/00 ,  B01F5/02 ,  B01F11/02 ,  F15D1/08

    CPC分类号： B01F5/0268 ,  B01F11/0208 ,  F15D1/08 ,  B01F2005/0025 ,  B01F3/02 ,  B01F3/04007

    摘要： A shear layer of a fluid flow has relatively large vortical structures generated by acoustic forcing from oscillations induced in a cavity closely adjacent to the flow so that these structures enhance mixing at the layer. The forcing frequency is selected by varying the dimensions of the cavity, and several cavities of different dimensions may be provided for forcing at different frequencies, including beat frequencies. The cavity provides passive, high amplitude forcing effective with a compressible shear layer due to high speed flow, including supersonic flow. Cavities of differing configuration provide forcing for fluid flow from nozzles of different geometries. The most effective enhancement is provided by particular excitation frequencies generated by a cavity having a size selected in accordance with dimensionless relations between the flow parameters and nozzle geometry.

    摘要翻译： 流体流动的剪切层具有相对较大的涡旋结构，该声学结构通过从与流体紧密相邻的空腔中诱发的振荡的声学强迫产生，使得这些结构增强了该层的混合。 通过改变空腔的尺寸来选择强制频率，并且可以提供不同尺寸的多个空腔用于在包括拍频的不同频率下强制。 空腔由于高速流动（包括超音速流动）而具有有效的可压缩剪切层的被动，高振幅强制。 不同结构的腔体提供强制流体从不同几何形状的喷嘴流出。 最有效的增强由具有根据流量参数和喷嘴几何形状之间的无量纲关系选择的尺寸的空腔产生的特定激发频率提供。

    Process for separating arsenic acid from an aqueous mixture comprising sulfuric and arsenic acids
    135.
    发明授权
    Process for separating arsenic acid from an aqueous mixture comprising sulfuric and arsenic acids 失效
    从含有硫酸和砷酸的含水混合物中分离砷酸的方法

    公开(公告)号：US5449503A

    公开(公告)日：1995-09-12

    申请号：US296983

    申请日：1994-08-26

    申请人： Charles L. Redmon ,  Somanahalli N. Subbanna ,  Robert A. Smith

    发明人： Charles L. Redmon ,  Somanahalli N. Subbanna ,  Robert A. Smith

    IPC分类号： C01B17/90 ,  C01G28/00 ,  C01B9/08 ,  C22B30/00

    CPC分类号： C01G28/005 ,  C01B17/907

    摘要： The present invention provides a process for recovering arsenic acid from a starting mixture comprising sulfuric and arsenic acids and water. In step (a), the starting mixture is treated with a sulfur (IV) compound which will reduce the arsenic acid to arsenic (III) compound under conditions sufficient to substantially convert the arsenic acid to arsenic (III) wherein the resulting mixture comprises arsenic (III) compound, the sulfur (IV) compound, sulfuric acid, and water. In step (b), the resulting mixture is purged with gas to substantially remove the sulfur (IV) compound from the mixture wherein the purged mixture comprises the arsenic (III) compounds, sulfuric acid, and water. In step (c), the purged mixture is treated under conditions sufficient to substantially separate the arsenic (III) compounds from the purged mixture. In step (d), the separated arsenic (III) compound is reacted with an oxidizing agent to substantially convert arsenic (III) compound to arsenic acid wherein the final mixture comprises arsenic acid, unreacted oxidizing agent, and water. In step (e), impurities are removed from the final mixture to provide substantially pure aqueous arsenic acid.

    摘要翻译： 本发明提供从包含硫酸和砷酸和水的起始混合物中回收砷酸的方法。 在步骤（a）中，起始混合物用硫（IV）化合物处理，该化合物在足以将砷酸基本转化成砷（III）的条件下将砷酸还原为砷（III）化合物，其中所得混合物包含砷 （III）化合物，硫（IV）化合物，硫酸和水。 在步骤（b）中，将所得混合物用气体吹扫以从混合物中基本上除去硫（IV）化合物，其中清除的混合物包含砷（III）化合物，硫酸和水。 在步骤（c）中，将清洗的混合物在足以使砷（III）化合物与被清除的混合物基本分离的条件下进行处理。 在步骤（d）中，分离的砷（III）化合物与氧化剂反应，以将砷（III）化合物基本上转化为砷酸，其中最终混合物包含砷酸，未反应的氧化剂和水。 在步骤（e）中，从最终混合物中除去杂质以提供基本上纯的砷酸水溶液。

    Molding compounds having low durometer and high tear strength
    136.
    发明授权
    Molding compounds having low durometer and high tear strength 失效
    具有低硬度和高撕裂强度的成型化合物

    公开(公告)号：US5397817A

    公开(公告)日：1995-03-14

    申请号：US281316

    申请日：1994-07-27

    申请人： Robert A. Smith

    发明人： Robert A. Smith

    IPC分类号： C08K3/32 ,  C08K3/22 ,  C08K3/34 ,  C08K3/36 ,  C08K5/5419 ,  C08L83/04 ,  C08L83/06 ,  C08K9/06

    CPC分类号： C08K3/36 ,  C08K3/22 ,  C08L83/04 ,  C08G77/16

    摘要： Silicone mold compositions are provided which exhibit low durometer and high tear strength properties and comprise a main filler of precipitated silica and a reinforcing co-filler selected from acicular CaSiO.sub.3 fillers, fumed aluminum oxide fillers, and spherical ceramic fillers. The co-fillers have large surface areas and small particle sizes. The co-fillers are used with alkoxy silane cross-linking agents of the formula (RO).sub.4 Si, particularly n-propylsilicate. Two-part silicone cure systems are provided which enable the rapid achievement of full die B tear strengths without the need for prolonged aging of these materials.

    摘要翻译： 提供了具有低硬度和高撕裂强度性能的硅酮模具组合物，并且包括沉淀二氧化硅的主填料和选自针状CaSiO 3填料，热解氧化铝填料和球形陶瓷填料的增强助填料。 共填料具有较大的表面积和较小的颗粒尺寸。 共填料与式（RO）4 Si的烷氧基硅烷交联剂，特别是正丙基硅酸盐一起使用。 提供了两部分硅酮固化体系，可以快速实现全模B撕裂强度，而不需要延长这些材料的老化。

    Furnace gas - sulfuric acid contact process for HF manufacture
    137.
    发明授权
    Furnace gas - sulfuric acid contact process for HF manufacture 失效
    炉气 - 硫酸接触过程用于HF制造

    公开(公告)号：US5271918A

    公开(公告)日：1993-12-21

    申请号：US666957

    申请日：1991-03-11

    申请人： Audie J. Patterson ,  Robert A. Smith ,  Theodore J. Jenczewski

    发明人： Audie J. Patterson ,  Robert A. Smith ,  Theodore J. Jenczewski

    IPC分类号： C01B7/19

    CPC分类号： C01B7/192 ,  C01B7/195

    摘要： A method is provided wherein the equilibrium HF concentration in the mixture of HF, sulfuric acid and water fed to an HF reaction furnace is greatly reduced by injecting a controlled amount of steam into an HF-removal process wherein the sulfuric acid mixture is also contacted with the hot HF gas leaving the HF reaction furnace. Reducing the HF concentration in this manner significantly improves furnace performance.The purpose of injecting steam is to adjust the water content of the mixture to the optimum value (about 12.5 weight percent) for HF removal, as well as to supply the heat required for HF removal without the need for an indirect heat exchanger.An additional advantage to this method is that since direct steam injection adds water to the process, in order to keep the furnace feed acid water concentration at the desirable level of less than 1%, oleum or SO.sub.3 must be added to react with the excess water. Since the reaction of water and SO.sub.3 is exothermic, this supplies additional heat to the process and no indirect heat exchanger is needed to achieve the desired high furnace feed acid temperature (>100.degree. C.).

    摘要翻译： 提供了一种方法，其中通过将受控量的蒸汽注入HF去除方法中，HF，硫酸和加入HF反应炉的水的混合物中的平衡HF浓度大大降低，其中硫酸混合物也与 离开HF反应炉的热HF气体。 以这种方式降低HF浓度显着提高了炉的性能。 注入蒸汽的目的是将混合物的水含量调节至最佳值（约12.5重量％），以除去HF，以及提供HF除去所需的热量，而不需要间接热交换器。 该方法的另一个优点是，由于直接蒸汽注入为该方法添加了水，为了使炉送入酸水浓度达到小于1％的期望水平，必须加入发烟硫酸或SO 3以与多余的水反应 。 由于水和SO 3的反应是放热的，因此为该方法提供额外的热量，并且不需要间接热交换器来实现所需的高炉进料酸温度（> 100℃）。

    Right angle impedance matched electrical connector
    138.
    发明授权
    Right angle impedance matched electrical connector 失效
    直角阻抗匹配电连接器

    公开(公告)号：US5114355A

    公开(公告)日：1992-05-19

    申请号：US662384

    申请日：1991-02-26

    申请人： David J. Kimmel ,  Paul P. Siwinski ,  Robert A. Smith ,  Richard E. Thurman ,  Stephen R. Adkins ,  Steven Feldman ,  Raymond J. Look

    发明人： David J. Kimmel ,  Paul P. Siwinski ,  Robert A. Smith ,  Richard E. Thurman ,  Stephen R. Adkins ,  Steven Feldman ,  Raymond J. Look

    IPC分类号： H01R12/50 ,  H01R12/70 ,  H01R12/71 ,  H01R12/72 ,  H01R12/73

    CPC分类号： H01R23/6873 ,  H01R12/716 ,  H01R12/724 ,  H01R12/737 ,  H01R12/7047

    摘要： Microstrip transmission of electrical signals between two arrays of signal conductors such as two printed circuit boards is maintained in an electrical connector in which signal contacts are disposed on opposite sides of the central ground bus. Signal contacts are urged inwardly into engagement with a central dielectric wall and a ground bus is similarly urged outwardly into engagement with the same wall to establish the microstrip configuration between each row of terminals in the central ground bus. The receptacle connector includes a right angle bend and signal contacts as well as the ground bus also have a right angle bend. The insulative housing of a right angle connector comprises upper and lower housing members which are snapped into engagement. Resilient arms, forming a part of the connector mounting assembly on the upper housing member, engage the lower housing member to hold it in place.

    摘要翻译： 在诸如两个印刷电路板的两个信号导体阵列之间的电信号的微带传输保持在电连接器中，其中信号触点设置在中央接地总线的相对侧上。 信号触点被向内推动成与中心电介质壁接合，并且接地母线被类似地向外推向与相同的壁接合，以在中央接地总线中的每排端子之间建立微带结构。 插座连接器包括直角弯曲和信号触点以及接地总线也具有直角弯曲。 直角连接器的绝缘壳体包括上部和下部壳体构件，其被卡扣接合。 在上壳体构件上形成连接器安装组件的一部分的弹性臂接合下壳体构件以将其保持就位。

    Automated rigid-disk finishing system providing in-line process control
    139.
    发明授权
    Automated rigid-disk finishing system providing in-line process control 失效
    自动刚性抛光系统提供在线过程控制

    公开(公告)号：US5099615A

    公开(公告)日：1992-03-31

    申请号：US744916

    申请日：1991-08-14

    申请人： Frank D. Ruble ,  John N. Walsh ,  Robert A. Smith

    发明人： Frank D. Ruble ,  John N. Walsh ,  Robert A. Smith

    IPC分类号： B24B7/17 ,  B24B21/00 ,  B24B21/12

    CPC分类号： B24B7/17 ,  B24B21/004 ,  B24B21/12

    摘要： The present invention provides an automated rigid-disk finishing system with "fly-by-wire" control of each of the relevant parameters involved in the texturing process. The system includes an abrasive tape, a means for forcibly pressing the tape against the substrate to cut microscopic grooves into the substrate's surface, and a control means for simultaneously controlling the speed and tension of the tape and for sensing the tension developed in the tape on both sides of the tape/substrate interface. The described system is thus capable of establishing tape speed and tape tension simultaneously, while providing a measure of the actual work being accomplished on the rigid disk surface.

    摘要翻译： 本发明提供了一种自动化刚性盘整理系统，其具有对纹理化过程中涉及的每个相关参数的“线控”控制。 该系统包括砂带，用于将胶带强制地压在衬底上以将微细凹槽切割成衬底的表面的装置，以及用于同时控制带的速度和张力并用于感测在带上形成的张力的控制装置 胶带/基板两面接口。 因此，所描述的系统能够同时建立磁带速度和磁带张力，同时提供在刚性磁盘表面上实现的实际工作的量度。

    Process for converting hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can then be rendered nonhazardous
    140.
    发明授权
    Process for converting hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can then be rendered nonhazardous 失效
    将六氟砷酸或其盐转化成砷酸或其盐，然后可以使其成为非危险的方法

    公开(公告)号：US5089241A

    公开(公告)日：1992-02-18

    申请号：US633652

    申请日：1990-12-20

    申请人： Robert A. Smith ,  Douglas G. Frick ,  Charles L. Redmon ,  Somanahalli N. Subbanna

    发明人： Robert A. Smith ,  Douglas G. Frick ,  Charles L. Redmon ,  Somanahalli N. Subbanna

    IPC分类号： A62D3/00 ,  A62D3/34 ,  A62D3/35 ,  A62D3/36 ,  A62D101/22 ,  A62D101/43 ,  A62D101/49

    CPC分类号： A62D3/35 ,  C01B7/195 ,  C01G28/005 ,  A62D2101/43 ,  A62D2101/49

    摘要： The present invention provides a process for the conversion of hazardous hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can be rendered nonhazardous. In particular, the hexafluoroarsenic acid or salt is converted to arsenic acid or salt which can be converted to a water insoluble salt. Known insolubilization and stabilization technology then renders the material nonhazardous.The present process involves converting hexafluoroarsenic acid or salt thereof contained in an aqueous mixture to arsenic acid or salt thereof. The process comprises the steps of: (a) adding acid selected from the group consisting of sulfuric acid, arsenic acid, perchloric acid, and mixtures thereof to the aqueous mixture in an amount sufficient to catalyze the hydrolysis of the hexafluoroarsenic acid or salt thereof and raising the temperature of the aqueous mixture before, during, or after the acid addition sufficient to remove substantially all of the hydrogen fluoride in subsequent step (b); (b) passing an inert gas through the heated acid mixture steam in a quantity sufficient to remove substantially all of the hydrogen fluoride in the heated acid mixture from the heated acid mixture; and (c) separating substantially all of the hydrogen fluoride from the heated acid mixture whereupon the hexafluoroarsenic acid or salt thereof converts substantially to arsenic acid or salt thereof.

    摘要翻译： 本发明提供了将危险的六氟砷酸或其盐转化成可以变得不危险的砷酸或其盐的方法。 特别地，将六氟砷酸或盐转化为可转化为水不溶性盐的砷酸或盐。 已知的不溶化和稳定化技术使材料无害化。 本方法涉及将含水混合物中所含的六氟砷酸或其盐转化为砷酸或其盐。 该方法包括以下步骤：（a）以足以催化六氟砷酸或其盐的水解的量向该含水混合物中加入选自硫酸，砷酸，高氯酸及其混合物的酸，以及 在酸加入之前，期间或之后提高含水混合物的温度，足以在随后的步骤（b）中除去基本上所有的氟化氢; （b）使惰性气体通过加热的酸性混合物蒸汽，其量足以从加热的酸混合物中除去加热的酸混合物中的基本上所有的氟化氢; 和（c）从加热的酸混合物中基本上分离所有氟化氢，因此六氟砷酸或其盐基本上转化为砷酸或其盐。