-
公开(公告)号：US3962627A
公开(公告)日：1976-06-08
申请号：US535021
申请日：1974-12-20
摘要： An improved method and apparatus for testing coins, metallic credit tokens and similar objects, capable of determining both type or denomination and genuineness thereof, utilize the effect upon the electrical impedance of a sensing component from the presence of an object under test in physical proximity to such component and the effect upon the direct current time constant of an electrical circuit containing such component from the influence of presence of such object upon the effective electrical impedance of such component, and employ a novel testing technique primarily involving determining whether or not a direct current voltage output from such circuit has risen to within a predetermined range of voltage level thereof in time coincidence with an interval of test enablement occurring a predetermined period of time, characteristic of acceptable objects of the particular kind being tested for, after an initial direct current energization of such circuit. Thus, dependence upon direct object-to-object comparisons, sensing of frequencies or other alternating current parameters, and even direct quantitative measurement of impedance values, all of which are difficult or expensive to carry out reliably, are avoided; and, since the influence of the object under test need be detected only in terms of comparative sensing of a time dependent direct current voltage level for conformity with a predetermined level range, the only really critical quantitative measurement or sensing required by the improved testing technique relates merely to time parameters, which can conveniently be accomplished with high precision and reliability through the use of relatively simple and economical apparatus. The essentially time oriented nature of the method advantageously permits its preferred implementation predominantly with digital time reference base generating and coincidence logic type apparatus to provide the mentioned precision and reliability in small space and with modest power requirements. The preferred form of sensing component is simply an inductance coil. The method and apparatus desirably permit the testing to be accomplished while the coin or other object is continuously moving along a test path, such as while rolling down a ramp under the influence of gravity. The preferred form of apparatus also includes features providing great convenience and versatility in readily adapting or adjusting the same for the testing of different types and denominations of domestic and foreign coins or the like.
-
公开(公告)号：US5569357A
公开(公告)日：1996-10-29
申请号：US234241
申请日：1994-04-28
申请人： Lowell L. Kuhn , James F. Ptacek , Gary P. Roepke
发明人： Lowell L. Kuhn , James F. Ptacek , Gary P. Roepke
CPC分类号： B01D3/10 , B01D3/08 , B01D3/343 , G01N2001/4027 , G01N2035/00495 , Y10S159/16
摘要： A vortex evaporator having a holder for holding at least one container presents a chamber wherein liquid is evaporated from a liquid and solid solution in a container. The vortex evaporator also includes a drive mechanism, coupled to the holder, for moving each container in an orbital motion within the chamber to cause the solution in the container to form a vortex configuration. The vortex evaporator further includes a gas supply system for directing gas into the container to increase the evaporation rate of the liquid and a control system for controlling operation of the vortex evaporator. In an alternative embodiment, a vacuum supply system may be utilized instead of the gas supply system. Further, the vortex evaporator will preferably include a heater, at least one liquid level sensor, a heat sensor and a motion dampening assembly all located within the chamber.
摘要翻译： 具有用于保持至少一个容器的保持器的涡流蒸发器具有一个室，其中液体从容器中的液体和固体溶液蒸发。 涡旋蒸发器还包括联接到保持器的驱动机构，用于在腔室内以轨道运动方式移动每个容器，以使容器中的溶液形成涡流构型。 涡流蒸发器还包括用于将气体引导到容器中以增加液体的蒸发速率的气体供应系统和用于控制涡旋蒸发器的操作的控制系统。 在替代实施例中，可以使用真空供应系统来代替气体供应系统。 此外，涡流蒸发器优选地包括加热器，至少一个液位传感器，热传感器和运动阻尼组件，其全部位于腔室内。
-
公开(公告)号：US5620561A
公开(公告)日：1997-04-15
申请号：US444523
申请日：1995-05-19
申请人： Lowell L. Kuhn , James F. Ptacek , Gary P. Roepke
发明人： Lowell L. Kuhn , James F. Ptacek , Gary P. Roepke
CPC分类号： B01D3/10 , B01D3/08 , B01D3/343 , G01N2001/4027 , G01N2035/00495 , Y10S159/16
摘要： A method of evaporating liquid from a liquid and solid solution in a container within a chamber involves moving the container in an orbital motion such that the solution forms a vortex configuration within the container and also involves directing gas into the container. The gas is directed into the container from a point source above the liquid in the container to decrease the partial pressure on the solution thereby increasing the evaporation rate of the liquid from the solution. To further increase evaporation of the liquid, heat may be applied to the container. The temperature within the chamber may be regulated by sensing the temperature within the chamber and controlling the application of heat to the container in response to the temperature sensed within the chamber. An alternative method of evaporating liquid from a liquid and solid solution in a container within a chamber also involves moving the container in an orbital motion, but further involves drawing a vacuum within the chamber rather than directing gas into the container.
摘要翻译： 从室内的容器中的液体和固体溶液中蒸发液体的方法包括使轨道运动中的容器移动，使得溶液在容器内形成涡旋构型，并且还包括将气体引导到容器中。 气体从容器中的液体上方的点源引导到容器中以降低溶液上的分压，从而增加液体从溶液中的蒸发速率。 为了进一步增加液体的蒸发，可以对容器施加热量。 可以通过感测室内的温度来调节室内的温度，并响应于室内感测的温度控制对容器的热量。 从室内的容器中的液体和固体溶液中蒸发液体的替代方法还包括以轨道运动移动容器，但还包括在腔室内抽取真空，而不是将气体引导到容器中。
-
公开(公告)号：US5373197A
公开(公告)日：1994-12-13
申请号：US970065
申请日：1992-11-02
IPC分类号： G01N27/447 , G05F1/66 , H02J3/00
CPC分类号： G01N27/44713 , G05F1/66 , Y10T307/406 , Y10T307/461 , Y10T307/549
摘要： A microprocessor-controlled power supply with substantially independent high voltage outputs monitors and regulates two separate electrophoresis applications running simultaneously. The software associated with the dual output power supply provides independent control of each application, including automatic crossover between control parameters within each application. After parameter values are selected for each application and the applications are initiated, the software monitors the actual parameter values with relation to the selected values and adjusts the actual value of the controlling parameter for each initiated application to maintain the actual parameter values within the selected parameter values.
摘要翻译： 具有基本上独立的高压输出的微处理器控制电源监测和调节同时运行的两个单独的电泳应用。 与双输出电源相关的软件提供对每个应用程序的独立控制，包括每个应用程序内的控制参数之间的自动交叉。 在为每个应用程序选择参数值并启动应用程序后，软件将根据所选值监控实际参数值，并调整每个启动的应用程序的控制参数的实际值，以将实际参数值保持在所选参数内 价值观。
-
公开(公告)号：US4934256A
公开(公告)日：1990-06-19
申请号：US311148
申请日：1989-02-14
申请人： Charles A. Moss , James F. Ptacek
发明人： Charles A. Moss , James F. Ptacek
IPC分类号： B08B15/02
CPC分类号： B08B15/023
摘要： A method and apparatus for controlling ventilation of a laboratory fume hood. The face velocity of air entering the fume hood is sensed by a velocity sensor, and a stepping motor controls damper blades in the exhaust duct to normally maintain the face velocity at a nearly constant level. A potentiometer senses the position of a sash that controls the fume hood face opening. When the sash is 40% open or less, the damper blades are adjusted to keep the volume rate of flow through the fume hood nearly constant. An alarm signal is generated if the flow is unduly low. The damper blades are fully opened either if a switch is operated or if the sash is abruptly opened. An unoccupied mode permits reduced air flow when the sash is nearly closed and the laboratory is unoccupied.
摘要翻译： 用于控制实验室通风柜通风的方法和装置。 通过速度传感器感测进入通风柜的空气的面速，并且步进电机控制排气管道中的风门叶片，以正常地将面速保持在几乎恒定的水平。 电位计感测控制通风橱面开口的窗扇的位置。 当窗扇40％开启或更小时，调节风门叶片以保持流过通风橱的流量几乎不变。 如果流量过低，则会产生报警信号。 如果开关被操作或者窗扇突然打开，则风门叶片完全打开。 空闲模式允许当窗扇几乎闭合并且实验室未被占用时减少气流。
-
-
-
-
搜索结果
5 条记录 (耗时 0.014 秒)