公开(公告)号：US4523097A

公开(公告)日：1985-06-11

申请号：US527954

申请日：1983-08-31

申请人： Robert W. Allington

发明人： Robert W. Allington

IPC分类号： G01N21/01 ,  G01N21/25 ,  G01N21/27 ,  G01N30/30 ,  G01N30/74 ,  G01N31/08

CPC分类号： G01N30/74 ,  G01N21/251 ,  G01N2030/3038 ,  G01N2201/0231

摘要： A beam of light falling within the range of 180 to 3,000 nanometers is transmitted through a flow cell in an optical compartment of an absorbance detector after warm up of the equipment while the eluant flows through the flow cell from a chromatographic column. The column extends upwardly from the absorbance detector into an air chamber having a volume of approximately 0.25 cubic foot formed with acrylic walls. Air flows from the absorbance detector under the power of a fan at approximately 10 cubic feet per minute upwardly through an air duct having a cross section of approximately 1.5 square inches to the top where it connects with the air chamber, the speed of the motor being adjustable until temperature varies less than one degree Celsius between the flow cell and the lower 10 centimeters of the column. Under these conditions Schlieren noise from the flow cell due to flow-induced thermo-optical effects is reduced.

公开(公告)号：US4438370A

公开(公告)日：1984-03-20

申请号：US240090

申请日：1981-03-03

申请人： Robert W. Allington

发明人： Robert W. Allington

IPC分类号： G01J3/10 ,  G01N21/01 ,  G05D23/24 ,  H05B41/00 ,  H05B41/36

CPC分类号： G05D23/2401 ,  Y10S315/07

摘要： To prolong the life of a deuterium gas discharge lamp and reduce photometric noise, a DC potential is applied between the cathode and the anode of the lamp to support the arc current through the tube and a separate AC potential is connected across the cathode through an AC amplitude control circuit that controls the amplitude of the AC current. While the cathode is at room temperature, a potential proportional to the AC current through the cathode is balanced against a potential proportional to the AC potential drop across the cathode in an operational amplifier circuit and the output used to operate an indicating device. During operation of the lamp, the output of the operational amplifier circuit is used to control power applied to the cathode through the AC amplitude control circuit. At this time, the proportionality factor for the AC potential drop is divided by a factor to cause an increase in the AC current through the cathode and rebalance the operational amplifier circuit under lamp operating conditions at point where the cathode energy is just above an anomaly in the cathode-power cathode-temperature curve.

摘要翻译： 为了延长氘气放电灯的寿命并降低光度噪声，在灯的阴极和阳极之间施加DC电位以支持通过管的电弧电流，并且通过AC在阴极之间连接单独的AC电势 控制电流幅度的幅度控制电路。 当阴极处于室温时，与通过阴极的交流电流成比例的电位与运算放大器电路中的阴极上的交流电位差成比例的电位和用于操作指示装置的输出平衡。 在灯的操作期间，运算放大器电路的输出用于通过AC振幅控制电路来控制施加到阴极的功率。 此时，交流电位降的比例因子除以一个因素导致通过阴极的交流电流的增加，并且在灯工作条件下，在阴极能量恰好高于异常点的位置使运算放大器电路重新平衡 阴极功率阴极温度曲线。

公开(公告)号：US4406158A

公开(公告)日：1983-09-27

申请号：US300602

申请日：1981-09-09

申请人： Robert W. Allington

发明人： Robert W. Allington

IPC分类号： G01N30/54 ,  B01D15/08 ,  F04B13/00 ,  G01N30/30 ,  G01N30/32 ,  G01N30/62 ,  G01N31/08

CPC分类号： G01N30/30 ,  G01N2030/326

摘要： To reduce errors in a single-stroke, syringe-type high pressure pump caused by changes in temperature, the temperature of the pump is maintained slightly above ambient by a thermostat-heater system. The volume of liquid within the pump is measured by measuring the speed of the motor from a predetermined starting point and changes in ambient temperature are measured and multiplied by the volume to arrive at a volume error figure. Correction factors are multiplied to take into consideration the different coefficients of thermal expansion of the fluid and the cylinder of the pump. The resulting signal controls the motor speed to maintain a constant flow in spite of temperature changes.

摘要翻译： 为了减少由温度变化引起的单冲程注射器型高压泵的误差，通过恒温加热器系统将泵的温度保持在高于环境温度。 通过从预定起点测量电动机的速度来测量泵内的液体体积，并测量环境温度的变化并乘以体积以得到体积误差图。 校正因子乘以考虑到泵的液体和气缸的不同的热膨胀系数。 所产生的信号控制电机速度，以保持恒定的流量，尽管温度变化。

公开(公告)号：US4188574A

公开(公告)日：1980-02-12

申请号：US890071

申请日：1978-03-27

申请人： Robert W. Allington

发明人： Robert W. Allington

IPC分类号： G01R27/18 ,  G01R31/02 ,  H02H3/50

CPC分类号： G01R31/025 ,  G01R27/18 ,  H02H3/50

摘要： A ground fault detector for use in combination with a floating secondary circuit of a direct current high voltage power supply comprising a detector circuit for sensing a relatively low electrical impedance. The existence of a low impedance represents a ground fault current between a part of the secondary circuit of the high voltage power supply and chassis ground to generate an alternating voltage. A rectifying circuit is operatively connected to the detector circuit for rectifying the alternating voltage. A warning indication network is responsive to the rectified alternating voltage for visually indicating the presence of the ground fault current.

摘要翻译： 一种用于与直流高压电源的浮动二次电路组合使用的接地故障检测器，包括用于感测相对低的电阻抗的检测器电路。 低阻抗的存在表示高压电源的二次电路的一部分与机壳接地之间的接地故障电流，以产生交流电压。 整流电路可操作地连接到检测器电路以整流交流电压。 警告指示网络响应于整流的交流电压，用于可视地指示接地故障电流的存在。

公开(公告)号：US07922909B2

公开(公告)日：2011-04-12

申请号：US11932343

申请日：2007-10-31

申请人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

发明人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

IPC分类号： B01D15/08

CPC分类号： B01J20/3064 ,  B01D15/206 ,  B01J8/0005 ,  B01J19/0013 ,  B01J19/18 ,  B01J20/283 ,  B01J20/285 ,  B01J2219/00162 ,  B01J2220/54 ,  B01J2220/82 ,  G01N30/56 ,  G01N2030/522 ,  G01N2030/528 ,  G01N2030/567 ,  G01N30/30

摘要： Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixture. The pressure eliminates wall effect and changes the structure in the column. Similarly, some columns that have a tendency to swell in the presence of aqueous solutions and pressurized while the solution is applied to prevent swelling and wall effect. This procedure also changes the structure in the column. The size of the separation effective openings can be controlled by the amount of the pressure and pores eliminated. Uniformity in the direction flow is improved by controlling polymerization with radiation rather than with conducted heat.

摘要翻译： 在柱套管中制备可渗透的聚合物整体材料。 在一个实施方案中，可渗透的聚合物整体材料在通过具有与聚合混合物接触的平滑活塞头的活塞施加压力时聚合。 压力消除了墙壁效应并改变了柱子的结构。 类似地，一些在水溶液存在下具有溶胀倾向并在施加溶液时加压以防止膨胀和壁效应的柱。 此过程也会更改列中的结构。 分离有效开口的尺寸可以通过消除的压力和孔隙的量来控制。 通过用辐射而不是传导热来控制聚合来提高方向流动的均匀性。

公开(公告)号：US07922908B2

公开(公告)日：2011-04-12

申请号：US11337071

申请日：2006-01-19

申请人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

发明人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

IPC分类号： B01D15/08

CPC分类号： B01J20/3064 ,  B01D15/206 ,  B01J8/0005 ,  B01J19/0013 ,  B01J19/18 ,  B01J20/283 ,  B01J20/285 ,  B01J2219/00162 ,  B01J2220/54 ,  B01J2220/82 ,  G01N30/56 ,  G01N2030/522 ,  G01N2030/528 ,  G01N2030/567 ,  G01N30/30

摘要： Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixture. The pressure eliminates wall effect and changes the structure in the column. Similarly, some columns that have a tendency to swell in the presence of aqueous solutions and pressurized while the solution is applied to prevent swelling and wall effect. This procedure also changes the structure in the column. The size of the separation effective openings can be controlled by the amount of the pressure and pores eliminated. Uniformity in the direction flow is improved by controlling polymerization with radiation rather than with conducted heat.

公开(公告)号：US07413659B2

公开(公告)日：2008-08-19

申请号：US11605980

申请日：2006-11-29

申请人： Robert W. Allington ,  Dale A. Davison ,  Scott L. Blakley

发明人： Robert W. Allington ,  Dale A. Davison ,  Scott L. Blakley

IPC分类号： B01D15/08

CPC分类号： G01N30/466 ,  B01D15/12 ,  B01D15/166 ,  B01D15/247 ,  G01N1/14 ,  G01N1/38 ,  G01N30/22 ,  G01N30/24 ,  G01N30/32 ,  G01N30/34 ,  G01N30/74 ,  G01N30/88 ,  G01N35/1095 ,  G01N35/1097 ,  G01N2001/383 ,  G01N2030/027 ,  G01N2030/324 ,  G01N2030/326 ,  G01N2030/347

摘要： To form a smooth gradient and a preparatory liquid chromatographic system having a plurality of syringe type pumps, solvents are alternately drawn and inserted into each cylinder. The solvents are alternately drawn into and through a long narrow path formed of tubing to create axial mixing and spreading out of the interface and then are drawn into the cylinders during the refill stroke of the piston at a sufficiently high velocity to create turbulence. The drawing of the solvents into one side of the cylinder a radial distance from the center creates circular eddy currents.

摘要翻译： 为了形成平滑的梯度和具有多个注射器型泵的准备液相色谱系统，交替地将溶剂抽吸并插入每个气缸中。 这些溶剂被交替地拉入和穿过由管形成的长狭窄的路径，以形成轴向混合并从界面展开，然后在活塞的再充填冲程期间以足够高的速度被吸入气缸中以产生湍流。 将溶剂从中心向径向的一侧绘制成圆形涡流。

公开(公告)号：US20080179773A1

公开(公告)日：2008-07-31

申请号：US11932343

申请日：2007-10-31

申请人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

发明人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

IPC分类号： B01D67/00

CPC分类号： B01J20/3064 ,  B01D15/206 ,  B01J8/0005 ,  B01J19/0013 ,  B01J19/18 ,  B01J20/283 ,  B01J20/285 ,  B01J2219/00162 ,  B01J2220/54 ,  B01J2220/82 ,  G01N30/56 ,  G01N2030/522 ,  G01N2030/528 ,  G01N2030/567 ,  G01N30/30

摘要： Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixture. The pressure eliminates wall effect and changes the structure in the column. Similarly, some columns that have a tendency to swell in the presence of aqueous solutions and pressurized while the solution is applied to prevent swelling and wall effect. This procedure also changes the structure in the column. The size of the separation effective openings can be controlled by the amount of the pressure and pores eliminated. Uniformity in the direction flow is improved by controlling polymerization with radiation rather than with conducted heat.

摘要翻译： 在柱套管中制备可渗透的聚合物整体材料。 在一个实施方案中，可渗透的聚合物整体材料在通过具有与聚合混合物接触的平滑活塞头的活塞施加压力时聚合。 压力消除了墙壁效应并改变了柱子的结构。 类似地，一些在水溶液存在下具有溶胀倾向并在施加溶液时加压以防止膨胀和壁效应的柱。 此过程也会更改列中的结构。 分离有效开口的尺寸可以通过消除的压力和孔隙的量来控制。 通过用辐射而不是传导热来控制聚合来提高方向流动的均匀性。

公开(公告)号：US07195461B2

公开(公告)日：2007-03-27

申请号：US10818831

申请日：2004-04-06

申请人： Robert W. Allington ,  Dale A. Davison ,  Scott L. Blakley

发明人： Robert W. Allington ,  Dale A. Davison ,  Scott L. Blakley

IPC分类号： F04B49/06 ,  G01N30/02 ,  B01F15/04

CPC分类号： G01N35/1097 ,  B01D15/12 ,  B01D15/166 ,  B01D15/247 ,  G01N1/38 ,  G01N30/22 ,  G01N30/24 ,  G01N30/32 ,  G01N30/34 ,  G01N30/466 ,  G01N30/74 ,  G01N30/88 ,  G01N2001/383 ,  G01N2030/027 ,  G01N2030/324 ,  G01N2030/326

摘要： To economically perform preparatory chromatography, a plurality of pumps each having a corresponding one of a plurality of pistons and a corresponding one of a plurality of cylinders are driven by one motor to draw and pump solvent simultaneously into corresponding columns. To form a gradient, the pumps are connected to two-way valves that are connected alternately to a first solvent and a second solvent, whereby the time said valve is in a first position controls the amount of solvent drawn from the first reservoir into said pumps and the amount of time in said second position controls the amount of said second solvent drawn from the second reservoir into said pumps and the solvent is mixed in the pumping systems. The detectors are photodiodes mounted to light guides in the flow cells that generate signals related to light absorbance and communicate with a controller, whereby the controller receives signals indicating solute between the light guides and causes collection of solute. An over-pressure system compensates for pressure over a predetermined level.

摘要翻译： 为了经济地进行准备色谱，每个具有多个活塞中的相应一个活塞和多个气缸中的相应一个的多个泵由一个电动机驱动，以将溶剂同时泵送到相应的列中。 为了形成梯度，泵连接到交替地连接到第一溶剂和第二溶剂的二通阀，由此所述阀处于第一位置的时间控制从第一储存器抽吸到所述泵中的溶剂的量 并且所述第二位置中的时间量将从第二储存器抽出的所述第二溶剂的量控制在所述泵中，并且溶剂在泵送系统中混合。 检测器是安装在流通池中的光导的光电二极管，其产生与吸光度相关的信号并与控制器通信，由此控制器接收指示光导之间的溶质并引起溶质的收集的信号。 过压系统补偿超过预定水平的压力。

公开(公告)号：US07074331B2

公开(公告)日：2006-07-11

申请号：US10607080

申请日：2003-06-25

申请人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

发明人： Robert W. Allington ,  Shaofeng Xie ,  Tao Jiang ,  Mingcheng Xu

IPC分类号： B01D15/08

CPC分类号： B01J20/3064 ,  B01D15/206 ,  B01J8/0005 ,  B01J19/0013 ,  B01J19/18 ,  B01J20/283 ,  B01J20/285 ,  B01J2219/00162 ,  B01J2220/54 ,  B01J2220/82 ,  G01N30/56 ,  G01N2030/522 ,  G01N2030/528 ,  G01N2030/567 ,  G01N30/30

摘要： Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixture. The pressure eliminates wall effect and changes the structure in the column. Similarly, some columns that have a tendency to swell in the presence of aqueous solutions and pressurized while the solution is applied to prevent swelling and wall effect. This procedure also changes the structure in the column. The size of the separation effective openings can be controlled by the amount of the pressure and pores eliminated. Uniformity in the direction flow is improved by controlling polymerization with radiation rather than with conducted heat.