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公开(公告)号：US4911556A
公开(公告)日：1990-03-27
申请号：US324676
申请日：1989-03-17
CPC分类号： B01F11/0082 , B01F13/0818
摘要： Efficient mixing is promoted in a turbulent stirring unit by providing an agitator with flexible finger-like appendages and by varying the rate of rotation of a rotating magnetic field such that the fingers execute an undulatory motion, disrupting laminar flow and tending to collapse the liquid vortex. Motor control for controlling the fluctuation of the rotating magnetic field may provided by simple and economical electronic or electromechanical means. The control unit may be separately configured to control a number of other pieces of equipment, either in common or independently. The controller also may be integrated into stirrers, vortexers or shaker tables or externally provided to control existing units.
摘要翻译： 通过提供具有柔性指状附属物的搅拌器和通过改变旋转磁场的旋转速率使得手指执行波动运动，扰乱层流并倾向于使液体涡流折叠来在湍流搅拌单元中促进高效混合 。 用于控制旋转磁场波动的电动机控制可以通过简单和经济的电子或机电装置来提供。 控制单元可以被单独地配置成控制多个设备的共同或独立的数量。 控制器还可以集成到搅拌器，涡旋器或振动台中，或者外部设置以控制现有的单元。
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公开(公告)号：US5120648A
公开(公告)日：1992-06-09
申请号：US199229
申请日：1988-05-26
IPC分类号： G01N22/00
CPC分类号： G01N22/00
摘要： A chemical analyzer in which the measurement of the change in attenuation of RF radiation propagated through a sample is used as the basis for calculating the change in concentration of a given chemical in the sample. Also disclosed are various probe and system designs which facilitate the use of RF attenuation as a basis for measurement of certain chemical characteristics of a sample.
摘要翻译： 使用通过样品传播的RF辐射的衰减变化的测量作为计算样品中给定化学品的浓度变化的基础的化学分析仪。 还公开了促进使用RF衰减作为测量样品的某些化学特性的基础的各种探针和系统设计。
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公开(公告)号：US4132288A
公开(公告)日：1979-01-02
申请号：US875310
申请日：1978-02-06
申请人： William H. Bingham
发明人： William H. Bingham
摘要： A ladder with retractable rungs is disclosed herein. The ladder includes an elongated housing having alternating apertures on opposite sides. A stem is carried in the housing. The stem can be manually reciprocated longitudinally and has a series of rungs hingedly attached to it. The rungs engage the apertures and extend outward to provide a step when the stem is moved upward. A supporting rod is pivotally connected inside the housing at its base so as to be swingable from a position to one side of the housing to a center position. The stem must be lifted when the supporting rod is moved to the center position, where the supporting rod then supports the stem with the rungs in the open position. A retaining rod is mounted pivotally inside the housing at the top of the stem. It is also swingable from one side to a center position where it prevents the stem from moving upward. The supporting and retaining rods are connected together by a control rod, and spaced apart vertically so that when one is in an engagement, the other is disengaged.
摘要翻译： 本文公开了具有伸缩梯的梯子。 梯子包括在相对侧上具有交替孔的细长壳体。 在壳体内装有一个杆。 杆可以手动地纵向往复运动并且具有铰链地连接到其上的一系列梯级。 梯级接合孔并向外延伸以在杆向上移动时提供一个台阶。 支撑杆在其基部处在壳体内部枢转地连接，以便能够从壳体的一个位置到一个位置摆动到中心位置。 当支撑杆移动到中心位置时，杆必须被提起，其中支撑杆然后支撑杆，梯级处于打开位置。 固定杆可旋转地安装在壳体顶部的杆的顶部。 它也可以从一侧摆动到中心位置，从而防止杆向上移动。 支撑杆和保持杆通过控制杆连接在一起，并且垂直间隔开，使得当一个接合时，另一个脱开。
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