公开(公告)号：US4162404A

公开(公告)日：1979-07-24

申请号：US930361

申请日：1978-08-02

申请人： Wade L. Fite ,  Richard L. Myers ,  Richard T. Brackmann

发明人： Wade L. Fite ,  Richard L. Myers ,  Richard T. Brackmann

IPC分类号： G01N27/62 ,  H01J49/02 ,  H01J27/00

CPC分类号： G01N27/626 ,  H01J49/025

摘要： A method and apparatus for monitoring particulates which are borne by a surrounding gaseous medium, such as found in smokestacks or the like, through interception of the particulates by a hot filament having a bias potential in the range of about 100 to 1000 volts whereupon each particulate decomposes into a burst of ions which is collected by a nearby electrode at ground potential, by counting those bursts which produce a predetermined total charge and, at the same time, measuring the DC electric current produced by the bursts and other ion exchange between the hot filament and the electrode. The filament operates at a temperature level wherein infrared and visible radiations are emitted, such radiations being monitored by a phototransistor which receives the radiations. The electrical signal from the phototransistor is employed in a feedback loop whereby the power to the filament is automatically either increased or decreased, and manually regulated within limits to maintain the detected radiation level and therefore the filament temperature at a prescribed value.

摘要翻译： 一种用于监测由周围的气体介质承载的颗粒的方法和装置，例如在烟囱等中发现的，通过具有约100至1000伏范围内的偏置电位的热丝截留微粒，由此每个颗粒 通过对产生预定总电荷的脉冲串进行计数，同时测量由脉冲和其他离子交换产生的直流电流，分解成由接地电位附近的电极收集的离子脉冲 灯丝和电极。 灯丝在其中发射红外线和可见光辐射的温度水平下工作，这样的辐射由接受辐射的光电晶体管监控。 来自光电晶体管的电信号用于反馈回路，由此对灯丝的功率自动地增加或减小，并且在极限内手动调节以保持检测到的辐射水平，并且因此将灯丝温度保持在规定值。

公开(公告)号：US4258257A

公开(公告)日：1981-03-24

申请号：US7746

申请日：1979-01-30

申请人： Richard T. Brackmann

发明人： Richard T. Brackmann

IPC分类号： H01J49/04 ,  B01D59/44

CPC分类号： H01J49/0031

摘要： Two converging molecular beams are introduced alternately into the inlet of a mass spectrometer by utilizing a chopping wheel apparatus to alternately pass the two molecular beams to the inlet of the mass spectrometer.

摘要翻译： 通过使用切割轮装置将两个会聚分子束交替地引入质谱仪的入口，以交替地将两个分子束传递到质谱仪的入口。

公开(公告)号：US5172581A

公开(公告)日：1992-12-22

申请号：US410506

申请日：1989-09-21

申请人： Richard T. Brackmann ,  Richard L. Myers ,  Sanjai K. Bijawat

发明人： Richard T. Brackmann ,  Richard L. Myers ,  Sanjai K. Bijawat

IPC分类号： G01N33/00

CPC分类号： G01N33/0029 ,  G01N33/0006

摘要： Fluids entrapped in small confined within spaces of an object are analyzed by securing the object containing the confined space by epoxy to a small fitting over a notch applied on the object's surface adjacent to the confined space, the fitting being a slidable seal attached to a small tube which has a piercing device adapted to move with the small tube relative to the fitting and the object containing the confined space to puncture same through the notch, whereby the entrapped gaseous fluid in the confined space emerges into the fitting and small tube, the entire system being a sealed enclosure. Attached to the small tube is a capillary which leads to an analyzing device, such as a mass spectrometer. The small tube fitting and capillary are sufficiently small in volume and configured so that gaseous fluid from the now ruptured confined space flows in a viscous condition from the object to the analyzing device and is in contact with minimal surface area to minimize any adsorption effects which would change the contents of the fluid sample. No elastomer O-rings or other materials known for their adsorption affinities insofar as substances of interest in the contents of the fluid emerging from the confined space are used. A heated chamber may receive the object having the confined space, the small tube including the penetrating device attached thereto and the capillary tube. One valve connected to the tube is provided for purging the system and for admitting calibration gases from an appropriate gas handling system. Confined spaces of interest may be in electronic devices, glasses as well as other solids which entrap fluids that it is desired to analyze.

摘要翻译： 通过将包含有限空间的物体通过环氧树脂固定在一个小的配件上，分散在物体表面上邻近被约束空间的分析处，从而分析被夹在物体空间内的流体，该配件是一个可滑动的密封件 管，其具有适于与小管相对于配件移动的穿刺装置，并且包含受限空间的物体通过切口刺穿，从而被封闭的空间中的截留的气态流体出现在配件和小管中，整个 系统是密封的外壳。 连接到小管的是毛细管，其通向分析装置，例如质谱仪。 小管接头和毛细管的体积足够小，并且构造成使得来自现在破裂的密闭空间的气态流体从物体流向分析装置的粘性状态，并且与最小的表面积接触以最小化任何吸附效应， 更改流体样品的内容物。 没有使用弹性体O形环或其他吸附亲和性的其他材料，只要使用从密闭空间中排出的流体的内容物中感兴趣的物质即可。 加热室可以容纳具有限制空间的物体，小管包括附接到其上的穿透装置和毛细管。 提供连接到管的一个阀，用于清洗系统并允许来自适当的气体处理系统的校准气体。 感兴趣的密闭空间可以是电子设备，玻璃以及其它需要分析的流体的固体。