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1. 发明授权

US11187629B2 Sample probe inlet flow system 有权
公开(公告)号：US11187629B2
公开(公告)日：2021-11-30
申请号：US16206291
申请日：2018-11-30
申请人： Smiths Detection-Watford Limited
发明人： Matthew Easton , Stephen J. Taylor
IPC分类号： G01N1/24 , G01N1/22 , G01N27/622
摘要： Ion modification An ion mobility spectrometer (100) comprising a sample inlet (108) comprising an aperture arranged to allow a sample of gaseous fluid to flow from an ambient pressure region to a low pressure region of the ion mobility spectrometer to be ionised; a controller (200) arranged to control gas pressure in the low pressure region to be lower than ambient pressure; and an ion modifier (126, 127, 202) configured to modify ions in the low pressure region, wherein the ions are obtained from the sample of gas.

2. 发明授权

US10910207B2 Ion modification 有权
公开(公告)号：US10910207B2
公开(公告)日：2021-02-02
申请号：US16568987
申请日：2019-09-12
申请人： Smiths Detection-Watford Limited
发明人： Jonathan Atkinson , Alastair Clark , Bruce Grant
IPC分类号： G01N27/62 , H01J49/06 , H01J49/00
摘要： An ion mobility spectrometer comprising an ioniser for ionising a sample; a detector separated from the ioniser by a drift chamber along which ions can travel from the ioniser toward the detector; a gate for controlling the passage of ions from the ioniser to the drift chamber; an ion modifier arranged between the ioniser and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

3. 发明授权

US10775283B2 On-demand vapor generator 有权
公开(公告)号：US10775283B2
公开(公告)日：2020-09-15
申请号：US16189192
申请日：2018-11-13
申请人： SMITHS DETECTION-WATFORD LIMITED
发明人： Alexander Parker , Marcedl Gowers , Jonathan Atkinson , John Fitzgerald
IPC分类号： H01J49/00 , G01N1/38 , B01B1/00 , B01L3/02 , B01D53/22 , F22B3/02 , G01N27/62
摘要： An on-demand vapour generator includes a vapour chamber configured to produce a vapour and a vapour absorption assembly configured to receive flows of vapour from the vapour chamber. The vapour absorption assembly includes a first vapour-permeable passage having a passage outlet and at least one second vapour-permeable passage that is closed. When vapour absorption assembly receives a flow of vapour from the vapour chamber, the flow of vapour passes through the first vapour-permeable passage to the passage outlet at least substantially without absorption of vapour from the flow of vapour. However, when a flow of vapour is not received from the vapour chamber, vapour entering the vapour absorption assembly from the vapour chamber passes into the first vapour-permeable passage and the at least one second vapour-permeable passage and is at least substantially absorbed.

4. 发明授权

US10171066B2 Compact high voltage RF generator using a self-resonant inductor 有权
公开(公告)号：US10171066B2
公开(公告)日：2019-01-01
申请号：US15262148
申请日：2016-09-12
申请人： Smiths Detection-Watford Limited
发明人： Alex Paul Hiley
IPC分类号： H03K3/012 , H03H7/38 , B03B5/08 , G01N27/62 , H01F19/04 , H01F27/255 , H01F27/28
摘要： RF generators including active devices driving series resonant circuits are described. The series resonant circuits include a self-resonant dual inductor. The RF generators can be used to drive capacitive loads.

5. 发明申请

US20180266923A1 APPARATUS AND METHOD FOR GASEOUS FLUID SAMPLING 审中-公开
公开(公告)号：US20180266923A1
公开(公告)日：2018-09-20
申请号：US15762282
申请日：2016-09-30
申请人： Smiths Detection-Watford Limited
发明人： Oliver Kirkby , Alastair Clark , Bruce Grant
IPC分类号： G01N1/22
CPC分类号： G01N1/2211
摘要： A detector inlet for providing a sample to an analytical apparatus for detecting a substance of interest, the detector inlet comprising a plenum for allowing passage of a flow of a gaseous fluid, the plenum comprising a sampling volume a sampling inlet arranged in the plenum and arranged to collect samples of the gaseous fluid from the sampling volume and to provide the samples to the analytical apparatus, wherein the flow carries particulates and a flow director arranged to create circulatory flow of the gaseous fluid around the plenum encircling the sampling inlet thereby to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet without entering the sampling volume.

6. 发明申请

US20170322126A1 ON-DEMAND VAPOUR GENERATOR 审中-公开
公开(公告)号：US20170322126A1
公开(公告)日：2017-11-09
申请号：US15609343
申请日：2017-05-31
申请人： Smiths Detection-Watford Limited
发明人： Alexander Parker , Marcel Gowers , Jonathan Atkinson , John Fitzgerald , Stephen Taylor
IPC分类号： G01N1/38 , B01B1/00 , B01D53/22 , B01L3/02 , F22B3/02 , G01N27/62
CPC分类号： B01B1/005 , B01D53/229 , B01L3/0289 , F22B3/02 , G01N1/38 , G01N27/622
摘要： An on-demand vapour generator includes a vapour chamber configured to produce a vapour and a vapour absorption assembly configured to receive flows of vapour from the vapour chamber. The vapour absorption assembly includes a first vapour-permeable passage having a passage outlet and at least one second vapour-permeable passage that is closed. When vapour absorption assembly receives a flow of vapour front the vapour chamber, the flow of vapour passes through the first vapour-permeable passage to the passage outlet at least substantially without absorption of vapour from the flow of vapour. However, when a flow of vapour is not received from the vapour chamber, vapour entering the vapour absorption assembly from the vapour chamber passes into the first vapour-permeable passage and the at least one second vapour-permeable passage and is at least substantially absorbed.

7. 发明申请

US20170241951A1 METHOD AND APPARATUS 审中-公开
公开(公告)号：US20170241951A1
公开(公告)日：2017-08-24
申请号：US15518574
申请日：2015-10-14
申请人： Smiths Detection-Watford Limited
发明人： Alastair Clark , Jonathan Atkinson
IPC分类号： G01N27/62 , H01J49/42 , H01J49/00
摘要： An ion filter for a mass spectrometer, the apparatus comprising an ion modifier; an ion selector configured to select a subset of a sample of ions based on their mobility in a gas; and a controller configured to operate the ion modifier in a first mode to modify the ions selected by the ion selector to provide daughter ions, and configured to operate the ion modifier in a second mode to output the ions selected by the ion selector; wherein the ion filter is adapted for providing output ions from the ion modifier to an intake of a mass spectrometer.

8. 发明申请

US20140318371A1 SUBSTANCE DETECTION DEVICE UTILIZING A CYCLONE PARTICLE SEPARATOR 审中-公开
标题翻译：使用循环粒子分离器的物质检测装置
公开(公告)号：US20140318371A1
公开(公告)日：2014-10-30
申请号：US14281603
申请日：2014-05-19
申请人： Smiths Detection-Watford Limited
发明人： Stephen RICHARDSON
IPC分类号： B01D45/16
CPC分类号： B01D45/16 , B04C5/14 , B04C5/181 , G01N1/2211
摘要： A substance detection device, including a chemical substance analyzer, including an ion mobility spectrometer (IMS), a desorber, a conduit, and a membrane. The membrane extends across a cross-section of the conduit, and the membrane is positioned to have a desorber side in gas communication with the desorber and an analysis side opposite the desorber side. The substance detection device can be configured to direct a portion of a chemical substance to the desorber through the conduit so that at least a portion of the entrained chemical substance is transferred to the membrane by interacting with the desorber side of the membrane. The membrane is adapted to diffuse at least a portion of the chemical substance transferred to the membrane through the membrane to the analysis side. The device also includes a particle separator including a protuberance extending into a collection chamber of the particle separator.
摘要翻译：一种物质检测装置，包括包含离子迁移谱仪（IMS），解吸器，导管和膜的化学物质分析仪。膜延伸穿过导管的横截面，并且膜定位成具有与解吸器气体连通的解吸器侧和与解吸器侧相对的分析侧。物质检测装置可以被配置为通过导管将化学物质的一部分引导到解吸器，使得夹带的化学物质的至少一部分通过与膜的解吸器侧相互作用而被转移到膜。膜适于将通过膜将转移到膜的化学物质的至少一部分扩散至分析侧。该装置还包括颗粒分离器，其包括延伸到颗粒分离器的收集室中的突起。

9. 发明申请

US20140087477A1 Ion Mobility Spectrometer Which Controls Carrier Gas Flow to Improve Detection 有权
标题翻译：离子迁移率光谱仪，用于控制载气流量，以改善检测
公开(公告)号：US20140087477A1
公开(公告)日：2014-03-27
申请号：US14082827
申请日：2013-11-18
申请人： Smiths Detection-Watford Limited
发明人： Stephen John Taylor
IPC分类号： G01N27/62
CPC分类号： G01N27/622 , H01J49/0422 , Y10T436/25875
摘要： IMS apparatus has an inlet with a preconcentrator opening into a reaction region where analyte molecules are ionized and passed via a shutter to a drift region for collection and analysis. A pump and filter arrangement supplies a flushing flow of clean gas to the housing in opposition to ion flow. A pressure pulser connects with the housing and is momentarily switched to cause a short drop in pressure, in the housing to draw in a bolus of analyte sample from the preconcentrator. Just prior to admitting a bolus of sample, the pump is turned off so that the flushing flow drops substantially to zero, thereby prolonging the time the analyte molecules spend in the reaction region.
摘要翻译： IMS装置具有入口，其具有通向反应区域的预浓缩器，其中分析物分子被离子化并经由快门通过漂移区域进行收集和分析。泵和过滤器装置与离子流相反地向壳体提供清洁气体的冲洗流。压力脉冲发生器与壳体连接并且瞬间切换以引起压力的短暂下降，在壳体中从预浓缩器中吸取大量分析物样品。在接受大量样品之前，泵关闭，使得冲洗流量基本上下降到零，从而延长了分析物分子在反应区域中消耗的时间。

10. 发明公开

US20230194473A1 AN ION SHUTTER, A METHOD OF CONTROLLING ION SHUTTER, AND DETECTION METHODS AND APPARATUS 审中-公开
公开(公告)号：US20230194473A1
公开(公告)日：2023-06-22
申请号：US17927137
申请日：2021-05-27
申请人： SMITHS DETECTION-WATFORD LIMITED
发明人： Paul ARNOLD , Jonathan ATKINSON , Alastair CLARK , Elizabeth HUMPHREYS
IPC分类号： G01N27/622 , H01J49/16 , H01J49/06 , H01J49/04
CPC分类号： G01N27/622 , H01J49/061 , H01J49/168 , H01J49/0422
摘要： A method of operating an ion mobility spectrometer comprises the following steps: drawing a sample of gaseous fluid into a reaction region of the ion mobility spectrometer; providing a first pulse of a pulsed ionisation source to ionise the sample of gaseous fluid, thereby to obtain first sample ions; after a first gate delay following the first trigger opening an ion shutter to permit a portion of the first sample ions to leave the reaction region; providing a second pulse of the pulsed ionisation source to further ionise the sample of gaseous fluid, thereby to obtain second sample ions; after a second gate delay following the first trigger opening the ion shutter to permit a portion of the second sample ions to leave the reaction region, wherein the second gate delay is different from the first gate delay.

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