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    Electrochemical cell
    1.
    发明授权
    Electrochemical cell 失效

    公开(公告)号：US3686091A

    公开(公告)日：1972-08-22

    申请号：US3686091D

    申请日：1970-10-02

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： SAWA KENNETH B ,  NETI RADHAKRISHNA MURTY

    IPC: G01N27/333 ,  G01N27/416 ,  G01N27/30 ,  G01N27/40

    CPC classification number: G01N27/4166 ,  G01N27/3335

    Abstract: THE DISCLOSURE RELATES TO AN IMPROVEMENT IN AN ELECTROCHEMICAL CELL FOR USE IN ION POTENTIAL MEASUREMENTS OF SOLUTIONS THE CELL CONTAINS A SENSING ELECTRODE, A REFERENCE ELECTRODE, AND AN EXTERNAL ELECTROLYTE COMPRISING THE SOLUTION TO BE TESTED. AT LEAST ONE ELECTRODE COMPRISES AN INTERNAL HALF CELLS SUPPORTED IN A CONTAINER OF NONCONDUCTIVE MATERIAL CONTAINING A SALT SOLTUION, AN INTERNAL ELECTROLYTE AND A LIQUID JUNCTION STRUCTURE OF AN ION PERMEABLE MATERIAL. THE IMPROVEMENT COMPRISES A SURFACTANT ADDED TO THE CELL SO THAT THE CONTACT ANGLE BETWEEN THE SOLUTION AND THE LIQUID JUNCTION STRUCTURE IS LESS THAN ABOUT 90*. AS A RESULT THE LIQUID JUNCTION STRUCTURE IS MADE MORE PERMEBLE TO WATER MOLECULES. AN IMPROVED ELECTROCHEMICAL ELECTRODE FOR USE IN ION POTENIAL MEASUREMENTS OF SOLUTIONS IS ALSO DISCLOSED.

    Bypass filter assembly and method of obtaining a filtered sample
    2.
    发明授权
    Bypass filter assembly and method of obtaining a filtered sample 失效
    旁通过滤器组件和获得过滤样品的方法

    公开(公告)号：US3674153A

    公开(公告)日：1972-07-04

    申请号：US3674153D

    申请日：1970-09-25

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： GOMEZ RAY J ,  SAWA KENNETH B

    IPC: B01D29/01 ,  B01D35/00 ,  B01D35/22 ,  B01D31/00

    CPC classification number: B01D29/01 ,  B01D29/904 ,  B01D29/945 ,  B01D35/00 ,  B01D35/22

    Abstract: A bypass filter assembly and method of obtaining a filtered sample from a process stream or the like in which the process stream is introduced into a filter chamber so as to produce a symmetrical bifurcated flow pattern of fluid therein which promotes a counter-rotating scouring or cleaning action on the membrane filter in the chamber. The housing of the assembly is divided into two sections. The inlet and outlet ports for the process stream and the filtered sample port are all located in one section of the housing so that the other section, namely the filter cap, may be removed from the first section without disconnecting any flow lines from the cap, thus facilitating rapid removal of the cap and replacement of the filter element therein.

    Abstract translation: 旁路过滤器组件和从过程流等获得过滤样品的方法，其中将工艺流引入过滤室中，以便在其中产生对称的分流流体图案，其促进反向旋转擦洗或清洗 对室内膜过滤器的作用。 组件的外壳分为两部分。 用于工艺流和过滤的样品端口的入口和出口都位于壳体的一个部分中，使得另一部分，即过滤器盖可以从第一部分移除，而不断开任何流动管线与盖， 从而有助于快速移除盖子并更换滤芯。

    Temperature control circuit with zero average temperature offset error
    3.
    发明授权
    Temperature control circuit with zero average temperature offset error 失效
    具有零平均温度偏差的温度控制电路

    公开(公告)号：US3678247A

    公开(公告)日：1972-07-18

    申请号：US3678247D

    申请日：1971-04-19

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： SAWA KENNETH B ,  BLEAK THOMAS M

    IPC: G05D23/24 ,  H05B1/02

    CPC classification number: G05D23/24 ,  G05D23/1913

    Abstract: A temperature sensing circuit generates a voltage proportional to the difference between a controlled temperature and a predetermined reference temperature. The voltage is integrated in an integrating amplifier whereby average temperature offset error is reduced to zero. The integrated voltage is compared to a reference potential in a comparator to generate a control signal when the integrated voltage exceeds the reference potential. The control signal operates a switching device through which electrical power is conducted to a heater whereby the controlled temperature is established.

    Abstract translation: 温度感测电路产生与受控温度和预定参考温度之间的差成比例的电压。 电压集成在积分放大器中，从而平均温度偏移误差减小到零。 将积分电压与比较器中的参考电位进行比较，以在积分电压超过参考电位时产生控制信号。 控制信号操作开关装置，通过该开关装置将电力传导到加热器，由此建立受控温度。

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