-
公开(公告)号：US4167777A
公开(公告)日：1979-09-11
申请号：US880809
申请日：1978-02-24
申请人： Robert W. Allington
发明人： Robert W. Allington
摘要： An alternating current input to direct current output power supply providing a regulated constant voltage output or constant current output and incorporating a switching-mode regulating element. Regulation is primarily obtained by means of a bi-directional switching element operated at a relatively low voltage, and the alternating current voltage output from the switching element and an associated power transformer is applied to a rectifying voltage multiplier to produce a high voltage output. The voltage multiplier is subject to receiving an unbalanced potential, thereby imposing a dc off-set potential onto the switching element to cause instability in the potential at the power supply output. A correcting circuit is provided to eliminate the effect of the dc off-set potential on the switching element.
摘要翻译： 交流输入到直流输出电源，提供稳定的恒定电压输出或恒定电流输出，并结合开关模式调节元件。 调节主要通过在相对低的电压下操作的双向开关元件获得，并且从开关元件和相关联的电力变压器输出的交流电压被施加到整流电压倍增器以产生高电压输出。 电压倍增器受到不平衡的电位，从而在开关元件上施加直流偏移电位，导致电源输出端的电位不稳定。 提供校正电路以消除开关元件上的直流偏移电位的影响。
-
公开(公告)号：US07351334B2
公开(公告)日：2008-04-01
申请号：US11605666
申请日：2006-11-28
发明人： Robert W. Allington
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： A chromatographic monitor includes an array of flow cells with individual light sensors that are collectively an array of photodiodes. The output from the photodiodes are multiplexed. To prevent losing information, the photodiodes are each connected to a different one of a plurality of inputs to the multiplexer through a corresponding one of a plurality of circuits that stores energy during the time the one inlet is not connected through the multiplexer to the signal processing circuitry that forms a part of an absorbance monitor. Preferably, the energy storing circuit is a non-switching circuit with low bandwidth and a flat-topped response to an impulse. This improves the signal to noise ratio. A one pole low pass filter with a (1-1/e) Dirac pulse fall time and equal to the multiplex entire cycle repeat time can perform this function and a one pole low pass filter provides satisfactory results. Still better results can be obtained from a three pole, one or two percent overshoot filter with combined minimum frequency bandwidth and fast rise time. A rise time equal to ½ the multiplex entire cycle.
摘要翻译： 色谱监测器包括具有单独的光传感器的流动池阵列，它们共同地是一组光电二极管。 来自光电二极管的输出被复用。 为了防止丢失信息，光电二极管各自通过多个电路中的相应一个电路将多个输入中的不同的一个输入连接到多个电路，多个电路在一个入口未通过多路复用器连接到信号处理期间存储能量 形成吸光度监测器的一部分的电路。 优选地，能量存储电路是具有低带宽和对脉冲的平顶响应的非开关电路。 这提高了信噪比。 具有（1-1 / e）狄拉克脉冲下降时间并且等于多路复用全周期重复时间的单极低通滤波器可以执行该功能，并且单极低通滤波器提供令人满意的结果。 可以从具有组合的最小频率带宽和快速上升时间的三极，一或二％过冲滤波器获得更好的结果。 上升时间等于多路复用整个周期的1/2。
-
公开(公告)号：US5994146A
公开(公告)日：1999-11-30
申请号：US224067
申请日：1998-12-31
CPC分类号： G01N33/1846 , G01N21/3504 , G01N21/75 , Y10T436/235
摘要： To determine the total organic carbon content of a flowing liquid in a continuous process, water and oxidizing agents enter lower ports in a continuous column and flow upwardly along a helical path with air gaps as they are mixed. The helical reaction path is formed by a helical glass cylinder between an ultraviolet lamp and outer wall of a continuous glass tube to cause rapid motion of the liquid. An ultraviolet lamp extends downwardly through the center of the column so that the outer confining surface of the helical path is the outer surface of the ultraviolet lamp, causing the liquid to move rapidly in intimate contact with the ultraviolet lamp to receive intense radiation. An air gap permits escape of air and reduces bubble size to reduce plug flow.
摘要翻译： 为了确定连续过程中流动液体的总有机碳含量，水和氧化剂在连续的塔中进入下端口，并在混合时沿着具有气隙的螺旋路径向上流动。 螺旋反应路径由紫外线灯和连续玻璃管外壁之间的螺旋状玻璃圆筒形成，以引起液体的快速运动。 紫外灯向下延伸穿过柱的中心，使得螺旋路径的外约束表面是紫外灯的外表面，使得液体快速移动，与紫外灯紧密接触以接收强烈的辐射。 气隙允许空气逸出并减小气泡尺寸以减少活塞流。
-
44.发明授权Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography 失效超临界流体萃取或超临界流体色谱仪的设备和方法
公开(公告)号：US5601707A
公开(公告)日：1997-02-11
申请号：US501536
申请日：1995-07-12
IPC分类号： B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/32 , G01N30/60 , G01N30/82 , G01N35/04 , G21F5/015 , B01D11/00 , B01D15/08
CPC分类号： B01D11/0203 , B01D11/0407 , F04B15/08 , F04B49/065 , F04B9/042 , F16K15/183 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/28 , G01N30/82 , G21F5/015 , F04B2205/03 , F04B2205/05 , F04B2205/09 , F05B2230/41 , F05C2201/0493 , F05C2253/12 , G01N2001/4033 , G01N2001/4061 , G01N2030/6008 , G01N2030/6013 , G01N2035/0441 , G01N30/02 , G01N30/32 , G01N30/60
摘要： An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. Because of the low pressure difference, the extraction cartridge need not have the strength to withstand significant pressure and can be made out of molded plastic for disposable use as well as stainless steel and/or machined plastic for reusability. The extraction cartridge can be removed and opened for sample access without the use of tools. The outside of the cartridge can be purged after it is installed in a heated high pressure vessel to remove contamination from its exterior. In one embodiment, the extractor includes a fraction collector for extractants, an automatic sample changer and an automatic cartridge transfer mechanism which provide completely automated extractions.
摘要翻译： 用于超临界流体萃取的装置包括可移除的提取筒，其在操作中在其内壁和外壁之间具有不显着的压力差。 由于低压差，提取筒不需要具有承受显着压力的强度，并且可以由用于一次性使用的模制塑料以及用于可重复使用的不锈钢和/或加工塑料制成。 提取盒可以拆卸和打开，无需使用工具进行样品通道。 在将其安装在加热的高压容器中以清除其外部的污染物之后，可将其清除。 在一个实施方案中，提取器包括用于萃取剂的馏分收集器，自动取样器和提供完全自动提取的自动送料机构。
-
公开(公告)号：US5250195A
公开(公告)日：1993-10-05
申请号：US966083
申请日：1992-10-23
IPC分类号： B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
CPC分类号： B01D11/0203 , B01D11/0407 , F04B15/08 , F04B49/065 , F04B9/042 , F16K15/183 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/28 , G21F5/015 , F04B2205/03 , F04B2205/05 , F04B2205/09 , F05B2230/41 , F05C2201/0493 , F05C2253/12 , G01N2001/4033 , G01N2001/4061 , G01N2030/6013 , G01N2035/0441 , G01N30/02
摘要： An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. In one embodiment, the extractor includes a fraction collector for extractants, an automatic sample changer and an automatic cartridge transfer mechanism which provide completely automated extractions. To automatically perform extraction, valves for the fluids are automatically opened and closed in synchronism with the insertion and removal of the cartridges. These valves force a hard valve element into a softer valve seat with a valve stem that does not rotate significantly under the control of a rotary motor.
摘要翻译： 用于超临界流体萃取的装置包括可移除的提取筒，其在操作中在其内壁和外壁之间具有不显着的压力差。 在一个实施方案中，提取器包括用于萃取剂的馏分收集器，自动取样器和提供完全自动提取的自动送料机构。 为了自动执行萃取，流体的阀门将与插入和拆卸墨盒同步自动打开和关闭。 这些阀将硬阀元件压入较软的阀座，阀杆在旋转电机的控制下不会显着转动。
-
公开(公告)号：US5239359A
公开(公告)日：1993-08-24
申请号：US909251
申请日：1986-09-19
申请人： Robert W. Allington
发明人： Robert W. Allington
IPC分类号： G01N21/25
CPC分类号： G01N21/255
摘要： To reduce noise in an absorbance monitor in which the light source is a deuterium lamp, an aspheric condensing mirror focuses light from an approximately 0.6 mm-high by 2 mm-wide part of the central bright spot in the deuterium lamp through a slit in an aperture plate which blocks all other light and an aspheric monochromator mirror focuses the light onto a plane reflective diffraction grating, which: (1) is mounted for orbiting about an axis parallel to the longitudinal axis of the slit; and (2) adjusted so that, as it orbits it reflects a selected wavelength of light to a beam splitter. Each beam is focused upon and transmitted through a different one of two equal oval apertures optically at least as large as the height of the image of the aperture near the lamp. The beams are converted to an electrical signal by silicon diode photosensors, thus using only light: (1) focused in both transverse planes and originating from the same spot on the central bright spot; and (2) with the same relative geometric weighting for light propagating in various directions from various subparts of the central bright spot. To reduce noise originating from flow-related refraction effects in the flow cell, the flow cell has reflective walls and a large collecting mirror focuses light entry in a large cone from the flow cell into a measuring photocell. This large cone has a wider angle than the cone of light entering the flow cell.
摘要翻译： 为了降低光源是氘灯的吸光度监测器中的噪声，非球面聚光镜通过氘灯中的狭缝将来自氘灯中的中心亮点的大约0.6mm高×2mm宽的部分的光聚焦 阻挡所有其他光的孔板和非球面单色仪镜将光聚焦到平面反射衍射光栅上，所述平面反射衍射光栅：（1）安装成围绕平行于狭缝的纵向轴线的轴线旋转; 和（2）进行调整，使得当其轨道运动时，它将选择的波长的光反射到分束器。 每个光束被聚焦并透射通过光学上至少与灯附近的孔的图像的高度相同的两个相等的椭圆形孔中的不同的一个。 光束通过硅二极管光电传感器转换为电信号，因此仅使用光：（1）聚焦在两个横向平面上并源自中心亮点上的同一点; 和（2）对于从中央亮点的各个子部分在各个方向传播的光具有相同的相对几何加权。 为了减少源自流动池中流动相关折射效应的噪声，流动池具有反射壁，并且大的收集镜将来自流动池的大锥体中的光入射到测量光电池中。 这个大锥体具有比进入流动池的光锥更宽的角度。
-
公开(公告)号：US5169511A
公开(公告)日：1992-12-08
申请号：US469311
申请日：1990-01-24
IPC分类号： B01D57/02 , G01N1/10 , G01N27/447
CPC分类号： G01N27/44743 , G01N27/44721 , G01N27/44756 , G01N27/44782
摘要： To collect from an electrophoresis capillary tube containing a liquid separating medium, a sample cup has two wells containing electrolyte. The bottoms of the wells are covered with clamped-on semipermeable membrane assemblies to permit the flow of buffer ions but not the migration of separated sample. Electrical continuity for the electrophoretic migration taking place in capillary tubes is provided through the electrolyte in wells, the assembled semipermeable membranes, electrolyte buffer residing the carrier, the electrode and a conductor leading to electrical ground. Separated zones are detected, electrophoretically eluted or electrosmotically discharged from the capillary tube into the electrolyte in well where they are trapped by the semipermeable membrane in assembly.
摘要翻译： 为了从含有液体分离介质的电泳毛细管中收集，样品杯具有两个含有电解质的孔。 孔的底部被夹紧的半透膜组件覆盖，以允许缓冲离子的流动，而不是分离的样品的迁移。 通过孔中的电解质，组装的半透膜，位于载体的电解质缓冲液，电极和导电地导体的导体，提供了在毛细管中进行的电泳迁移的电连续性。 分离的区域被检测，电泳洗脱或电渗从毛细管排出到电解质中，在那里它们被组合中的半透膜捕获。
-
公开(公告)号：US5158675A
公开(公告)日：1992-10-27
申请号：US535565
申请日：1990-06-11
IPC分类号： G01N30/34
CPC分类号： G01N30/34 , G01N2030/347 , Y10T137/2499
摘要： To supply a programmed gradient to a high pressure pump for introduction into a column, a mixer, degasser and accumulator communicates with the high pressure pump to supply fluid thereto, having a volume no more than 150 times the chamber volume of the high pressure pump. The mixer, degasser and accumulator includes temperature sensors which sense when the mixer, degasser and accumulator has been emptied to a level where it cannot respond to a demand for fluid from said high pressure pump and provides a signal to a low pressure pump which responds by cycling to again fill the mixer, degasser and accumulator. Upon receiving a demand signal, the low pressure pump fills by drawing fluid from a plurality of fluid sources to compose the gradient being used at that time, with the pump slowing during valve opening and closing so as to avoid cavitation.
摘要翻译： 为了向高压泵提供编程梯度以引入塔中，混合器，脱气器和蓄能器与高压泵连通以向其提供流体，其体积不超过高压泵的室容积的150倍。 混合器，脱气机和蓄能器包括温度传感器，其感测混合器，脱气器和蓄能器何时被排空到不能响应来自所述高压泵的流体需求的水平，并且向低压泵提供信号，该低压泵由 循环再次填充混合器，脱气机和蓄压器。 在接收到需求信号时，通过从多个流体源抽取流体来填充低压泵以构成当时使用的梯度，同时在阀打开和关闭期间泵减慢，以避免空化。
-
公开(公告)号：US5132014A
公开(公告)日：1992-07-21
申请号：US786752
申请日：1991-11-01
IPC分类号： A61B17/32 , A61B18/14 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
CPC分类号： G21F5/015 , B01D11/0203 , B01D11/0407 , F04B15/08 , F04B49/065 , F04B9/042 , F16K15/183 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/28 , A61B17/32 , A61B2018/126 , F04B2205/03 , F04B2205/05 , F04B2205/09 , F05B2230/41 , F05C2201/0493 , F05C2253/12 , G01N2001/4033 , G01N2001/4061 , G01N2030/6013 , G01N2035/0441 , G01N30/02 , Y10T29/53443
摘要： An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. Because of the low pressure difference, the extraction cartridge need not have the strength to withstand significant pressure and can be made out of molded plastic for disposable use as well as stainless steel and machined plastic for reusability. The extraction cartridge can be removed and opened for sample access without the use of tools. The outside of the cartridge can be purged after it is installed in a heated high pressure vessel to remove contamination from its exterior.
摘要翻译： 用于超临界流体萃取的装置包括可移除的提取筒，其在操作中在其内壁和外壁之间具有不显着的压力差。 由于低压差，提取盒不需要具有承受显着压力的强度，并且可以由用于一次性使用的模制塑料以及用于可重复使用的不锈钢和机加工塑料制成。 提取盒可以拆卸和打开，无需使用工具进行样品通道。 在将其安装在加热的高压容器中以清除其外部的污染物之后，可将其清除。
-
公开(公告)号：US4809123A
公开(公告)日：1989-02-28
申请号：US851740
申请日：1986-04-14
IPC分类号： G01R19/165 , G01R27/18 , G01R31/02 , H02H3/16
CPC分类号： G01R19/16571 , G01R27/18 , G01R31/025
摘要： To detect a ground fault, the alternating current leakage current to common AC electrical ground is sensed across a resistor and applied to one input of an analog gate. The analog gate is opened by the positive going voltage from the high-voltage secondary of the power supply transformers between 7 degrees from the crossover point and 103 degrees to pass only that portion of the potential representing the alternating current leakage current which is in phase with the potential on the secondary windings of the power supply transformer and thus provide a signal representing the real component of the AC impedance to ground. A reference preset level of impedance and the signal from the analog gate are compared to provide a signal whenever the real component of the AC leakage current exceeds the preset value.
摘要翻译： 为了检测接地故障，通过电阻器检测到对公共交流电接地的交流漏电流，并将其施加到模拟门的一个输入端。 模拟栅极由电源变压器的高压次级的正向电压在从交叉点7度到103度之间打开，仅通过表示与同相的交流漏电流的那部分电位 电源变压器的次级绕组上的电位，从而提供一个表示交流阻抗对地的实际分量的信号。 比较交流漏电流的实际分量超过预设值时，将参考预设电平的阻抗和来自模拟门的信号进行比较，以提供信号。
-
-
-
-
-
-
-
-
-
搜索结果
84 条记录 (耗时 0.041 秒)
