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41. 发明授权

US4063156A Assymetric cylinder electron capture detector 失效
标题翻译：比例圆柱电子捕获检测器
公开(公告)号：US4063156A
公开(公告)日：1977-12-13
申请号：US662064
申请日：1976-02-27
申请人： Paul Louis Patterson
发明人： Paul Louis Patterson
IPC分类号： G01N27/64 , G01N27/66 , G01N30/70 , G01N27/00
CPC分类号： G01N30/70 , G01N27/66
摘要： An asymmetric cylinder electron capture detector comprises an electrode configured to define an ionization volume, a source of ionizing radiation disposed within the ionization volume, a collector electrode, with a gas flowing past the collector electrode into the ionization volume. The electron current to the collector electrode provides an indication of the presence of electronegative constituents in the gas passing into the ionization volume. In order to provide wide dynamic range, the face of the collector electrode is disposed as close as possible to the electrode defining the ionization volume, yet is located so as to minimize field-free background current. The collector electrode and the electrode defining the ionization volume are each of cylindrical configuration, and are coaxially aligned but are spaced apart with respect to each other. The two electrodes are mechanically connected via an intermediately disposed cylindrical insulator cylinder. The collector electrode is received in one end of the insulator cylinder, and the electrode defining the ionization volume is received within the other end of the insulator cylinder. The collector electrode has an elongate portion extending into the interior of the insulator cylinder, but spaced apart from the inner surface of the insulator cylinder. This configuration provides a long insulative path to prevent electrical leakage between the electrodes. A transverse gas exit port is provided in that portion of the collector electrode within the insulator cylinder in order to impart turbulence to the flow of gas through the insulator cylinder into the ionization volume.
摘要翻译：非对称气缸电子捕获检测器包括被配置为限定离子化体积的电极，设置在离子化体积内的电离辐射源，集电极，气体通过集电极流入电离体积。到集电极的电子电流提供了在进入电离体积的气体中存在电负性成分的指示。为了提供宽的动态范围，集电极的表面尽可能靠近限定电离体积的电极设置，但是被定位成使无场基底电流最小化。限定电离体积的集电极和电极各自为圆柱形构造，并且彼此同轴对齐，但彼此间隔开。两个电极通过中间设置的圆柱形绝缘体圆筒机械连接。收集电极被接收在绝缘体圆筒的一端中，并且限定离子化体积的电极被接收在绝缘体圆筒的另一端内。集电极具有延伸到绝缘体圆筒的内部的细长部分，但是与绝缘体圆筒的内表面间隔开。这种结构提供了一种长的绝缘路径，以防止电极之间的漏电。在绝缘体圆筒内的集电极的该部分中设置有横向气体出口，以便将通过绝缘体圆筒的气体流引入电离体积中。

42. 发明授权

US4053776A Sub-micron particle detector 失效
标题翻译：亚微米颗粒检测器
公开(公告)号：US4053776A
公开(公告)日：1977-10-11
申请号：US689757
申请日：1976-05-25
申请人： Martin Hertzberg , Charles D. Litton , Randall Garloff
发明人： Martin Hertzberg , Charles D. Litton , Randall Garloff
IPC分类号： G01N27/66 , G08B17/11 , G01T1/185
CPC分类号： G01N27/66 , G08B17/11
摘要： An instrument to detect submicron particles by charge-transfer attachment. The instrument is made up of a charging chamber with two concentric cylindrical electrodes, a remote third collector electrode, and a pump to force ambient air through the charging chamber and into the collection electrode. The innermost electrode of the charging chamber is supplied with a radioactive material having a gold foil covering. This material can create a small bipolar region symmetrical to the inner electrode where primary ionization takes place. Positive ions created in this region move to the larger outside unipolar region to attach themselves to submicron particles. These charged particles are then forced from the charged chamber at which time they may either impinge on the collection electrode to create a measurable axial current or the particles may enter a size discrimination chamber. Should they enter this discrimination chamber, particles of a given mobility or size are collected by two additional concentric cylindrical electrodes.

43. 发明授权

US3892968A Electron capture detector systems 失效
标题翻译：电子捕获检测系统
公开(公告)号：US3892968A
公开(公告)日：1975-07-01
申请号：US42161573
申请日：1973-12-04
申请人： LOVELOCK JAMES EPHRAIM
发明人： LOVELOCK JAMES EPHRAIM
IPC分类号： G01N27/66 , G01T1/18
CPC分类号： G01N27/66
摘要： Two electron capture detectors are connected together such that a gas flows through the first detector and then into the second detector. The potential across the first detector is switched regularly between maximum and minimum values and the signal derived from the second detector is modulated by this switching action whenever a strong electron absorber is present in the gas flow.
摘要翻译：两个电子捕获检测器连接在一起，使得气体流过第一检测器，然后流入第二检测器。第一检测器上的电势在最大值和最小值之间规则地切换，并且每当气流中存在强电子吸收体时，通过该开关动作来调制从第二检测器得到的信号。

44. 发明授权

US3820015A Sensor for measuring the concentration of one gas in a multiple gas sample 失效
标题翻译：用于测量一种气体在多种气体样品中浓度的传感器
公开(公告)号：US3820015A
公开(公告)日：1974-06-25
申请号：US28479472
申请日：1972-08-30
申请人： BENDIX CORP
发明人： JEUNEHOMME M
IPC分类号： G01N27/66 , H01J49/14 , G01N27/62 , H01J37/00
CPC分类号： H01J49/14 , G01N27/66
摘要： A sensor for measuring the concentration of oxygen in exhaust gas from an internal combustion engine in which a source of low energy beta electrons for ionizing oxygen molecules is disposed in a secondary exhaust conduit is illustrated herein. A constant volume pump moves exhaust gas through the secondary conduit at a predetermined rate. A collector plate is disposed downstream from the source of beta electrons, and a potential difference is maintained between the beta electron source and the collector plate so that oxygen ions separate from any other ions that might be produced and strike the collector plate. The charge on that plate is then measured to determine the concentration of oxygen in the exhaust gas.

45. 发明授权

US3798625A Rate-of-change combustion and combination detection apparatus 失效
标题翻译：变化率燃烧和组合检测装置
公开(公告)号：US3798625A
公开(公告)日：1974-03-19
申请号：US3798625D
申请日：1970-08-13
申请人： SCI SYSTEMS INC
发明人： MC MILLIAN L , FROHWEIN G
IPC分类号： G01N27/66 , G08B17/11 , H01J41/08 , G08B17/10
CPC分类号： G01N27/66 , G08B17/11 , H01J41/08
摘要： An ionization-type gas contamination detector, intended primarily for use as a fire detector, in which a substance which emits predominantly low-energy beta particles is used as an ionizing radiation source in an ionizing chamber. Rapid changes in ionization current, which indicate the presence of a fire or smoke preceding a fire, are detected and an alarm is energized by a rate-of-change circuit in response to such changes. The output of the ionization chamber is amplified, and a level detector energizes the alarm when the amplified chamber output reaches a predetermined level. The output of the amplifier is adjusted relatively slowly to a reference level. In one embodiment, the amplifier output is adjusted to the reference level by the activation of a sample-and-hold feedback loop for a short period of time. In another embodiment, continuous feedback through a circuit with a relatively long time constant provides the desired adjustment. This feature makes the device relatively insensitive to normal atmospheric and environmental changes, while being very sensitive to changes in the level of combustion products in the atmosphere.
摘要翻译：主要用作火灾探测器的电离型气体污染检测器，其中主要以低能量β粒子发射的物质被用作电离室中的电离辐射源。检测到电离电流的快速变化，其指示在火灾之前存在火或烟，并且通过响应于这种变化的变化率电路来激励警报。电离室的输出被放大，当放大室输出达到预定水平时，电平检测器激励报警器。将放大器的输出相对缓慢地调整到参考电平。在一个实施例中，通过在短时间段内激活采样保持反馈回路将放大器输出调整到参考电平。在另一个实施例中，通过具有较长时间常数的电路的连续反馈提供所需的调整。该特征使得该装置对正常的大气和环境变化相对不敏感，同时对大气中燃烧产物的变化非常敏感。

46. 发明授权

US3562521A Instrument for measurement of partial pressure of components in a fluid mixture 失效
标题翻译：用于测量流体混合物中组分的部分压力的仪器
公开(公告)号：US3562521A
公开(公告)日：1971-02-09
申请号：US3562521D
申请日：1968-01-30
申请人： LION PRECISION CORP
发明人： VANDERSCHMIDT GEORGE FREDERICK , RILEY JAMES SCOTT
IPC分类号： G01N27/66 , G01N33/00 , G01N21/26 , G01N23/12 , H01J37/00
CPC分类号： G01N27/66 , G01N33/0032
摘要： A system providing an output signal linearly related to the amount of one selected component present in a mixture of fluids having at least two components. The system includes at least two detectors, one producing an output signal which may be expressed as the sum of two terms where the first term varies in linear proportion to variations in the partial pressure of the selected component and the second term varies in proportion to the variations in the total pressure of the fluid independent of its composition. The second detector produces an output which varies in proportion to variations in the total pressure of the mixture, independent of its composition. The two signals are then combined to produce an output signal which varies linearly with the amount of the selected component, independent of variations in the total pressure of the mixture.

47. 发明授权

US3408129A Hydrogen detector with temperature sensing and control means 失效
标题翻译：具有温度检测和控制装置的氢气检测器
公开(公告)号：US3408129A
公开(公告)日：1968-10-29
申请号：US55965566
申请日：1966-05-24
申请人： SAMUEL C. LAWRENCE JR.
发明人： LAWRENCE JR SAMUEL C
IPC分类号： G01N27/66 , G01N27/70
CPC分类号： G01N27/70 , G01N27/66

48. 发明授权

US3373282A Ionizing radiation dose rate measuring devices including utilization as gas density meters 失效
标题翻译：电离辐射剂量率测量装置包括利用气体密度计
公开(公告)号：US3373282A
公开(公告)日：1968-03-12
申请号：US34461464
申请日：1964-02-13
申请人： ARMY USA
发明人： FALK FRED W
IPC分类号： G01N27/66 , H01J47/06
CPC分类号： G01N27/66 , H01J47/06

49. 发明授权

US3271756A Method and apparatus for detecting a hazardous condition 失效
标题翻译：用于检测危险状况的方法和装置
公开(公告)号：US3271756A
公开(公告)日：1966-09-06
申请号：US1682760
申请日：1960-03-22
申请人： HAROLD J BURKE
发明人： CRAWFORD ROBERT B P , TACKETT DONESE B
IPC分类号： G01N27/66 , G08B17/11 , G08B17/12
CPC分类号： G08B17/12 , G01N27/66 , G08B17/11

50. 发明授权

US3124952A Gas chromatograph 失效
公开(公告)号：US3124952A
公开(公告)日：1964-03-17
申请号：US3124952D
IPC分类号： G01N27/66 , G01N30/10 , G01N30/80
CPC分类号： G01N27/66 , G01N30/10 , G01N30/80

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