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67 条记录 (耗时 0.015 秒)

    CALORIMETER
    53.
    发明公开
    CALORIMETER 有权
    热量计

    公开(公告)号：EP2160579A1

    公开(公告)日：2010-03-10

    申请号：EP07863962.2

    申请日：2007-11-06

    申请人： LECO CORPORATION

    发明人： BRUSHWYLER, Kevin R. ,  HOSS, John T. ,  LATINO, Octavio R.

    IPC分类号： G01K17/00

    CPC分类号： G01K17/00 ,  G01N25/44 ,  G01N25/4866 ,  Y10T436/208339

    摘要： A calorimeter includes a bucket cover which is used to reconfigure an isothermal water reservoir to provide for temperature equilibration prior to sample analysis and subsequently define a fixed volume of water during analysis in which high precision temperature measurements can be recorded. The apparatus includes mechanisms for sealing and controlling the cover, and for coupling the combustion vessel to the cover while minimizing the thermal contact between them. Improved thermal isolation between the fixed volume of water and the surrounding environment is also achieved.

    摘要翻译： 量热计包括桶盖，其用于重新配置等温储水器以在样品分析之前提供温度平衡，并且随后在分析期间限定固定体积的水，其中可记录高精度温度测量值。 该装置包括用于密封和控制盖的机构，并且用于将燃烧容器耦合到盖，同时最小化它们之间的热接触。 也实现了固定体积的水和周围环境之间的改善的热隔离。

    AUTOMATED CALORIMETER
    55.
    发明公开
    AUTOMATED CALORIMETER 有权
    全自动量热仪

    公开(公告)号：EP1883809A2

    公开(公告)日：2008-02-06

    申请号：EP06752165.8

    申请日：2006-05-04

    申请人： LECO CORPORATION

    发明人： BRUSHWYLER, Kevin, R.

    IPC分类号： G01N25/26 ,  G01N25/00 ,  G01K17/00

    CPC分类号： G01N25/4866 ,  G01K17/00 ,  G01N25/44 ,  Y10T436/208339

    摘要： An automated apparatus for determining the calorific value of combustible substances employs an integrated, isothermal water reservoir to reduce complexity of the apparatus and facilitates automation of the calorimeter by providing a convenient source of isothermal water. A moving divider is used to reconfigure the isothermal water reservoir (70) to either provide the temperature equilibration prior to sample analysis or define a fixed volume of water during analysis in which high precision temperature measurements can be recorded. The apparatus includes mechanisms for controlling the moving divider, a sample holding combustion vessel (20), and loading, cleaning, and unloading the combustion vessel. This eliminates key analysis steps that had previously required by manual intervention by an operator.

    MULTI-REFLECTING TIME-OF-FLIGHT MASS SPECTROMETER WITH ISOCHRONOUS CURVED ION INTERFACE
    56.
    发明公开
    MULTI-REFLECTING TIME-OF-FLIGHT MASS SPECTROMETER WITH ISOCHRONOUS CURVED ION INTERFACE 有权
    等时CROOKED阳离子表面多次反射飞行时间质谱仪

    公开(公告)号：EP1866951A2

    公开(公告)日：2007-12-19

    申请号：EP06748558.1

    申请日：2006-03-22

    申请人： LECO CORPORATION

    发明人： VERENTCHIKOV, Anatoli N. ,  YAVOR, Mikhail

    IPC分类号： H01J49/40

    CPC分类号： H01J49/408 ,  H01J49/406 ,  H01J49/48

    摘要： The present invention relates generally to a multi-reflecting time-of-flight mass spectrometer (MR TOF MS). To improve mass resolving power of a planar MR TOF MS (11), a spatially isochronous and curved interface (21) may be used for ion transfer in and out of the MR TOF analyzer (11). One embodiment comprises a planar MR TOF MS (11) with periodic lenses (14) in the field-free space, a linear ion trap (17) for converting ion flow into pulses and a C-shaped isochronous interface made of electrostatic sectors. The interface (21) allows transferring ions around the edges and fringing fields (13) of the ion mirrors (12) without introducing significant time spread. The interface (21) may also provide energy filtering of ion packets. The non-correlated turn-around time of ion trap converter (17) may be reduced by using a delayed ion extraction from the ion trap and excessive ion energy is filtered in the curved interface (21).

    Control circuit for thermal conductivity cell
    58.
    发明公开
    Control circuit for thermal conductivity cell 有权
    为用于测量热导率的单元控制电路

    公开(公告)号：EP1227319A3

    公开(公告)日：2004-11-24

    申请号：EP02250592.9

    申请日：2002-01-29

    申请人： LECO CORPORATION

    发明人： Willis, Peter Markel

    IPC分类号： G01N27/18

    CPC分类号： G01N27/185

    摘要： A control circuit for a thermal conductivity cell employs a constant resistance bridge drive circuit (30) which automatically adjusts to maintain a measurement filament (16) at a constant resistance. A reference filament (14) provides a differential signal representative of the concentration of an analyte. A detection circuit (50-70) utilizes digital/analog methods to significantly reduce l/f noise of an amplifier providing at least a seven fold improvement in signal-to-noise ratio. The circuit also includes a bridge nulling method (80) adjusted under microprocessor (70) control to eliminate manual offset adjustments. A reference protection circuit (90) is coupled to the reference filament (14) and prevents the voltage applied to the filaments from overheating the filaments in the event there is a breach in the gas flow path.

    Analyzing system for high accuracy nitrogen determination
    60.
    发明公开
    Analyzing system for high accuracy nitrogen determination 有权
    分析系统zur Feststellung der Stickstoffkonzentration mit hoher Genauigkeit

    公开(公告)号：EP1207390A2

    公开(公告)日：2002-05-22

    申请号：EP01309361.2

    申请日：2001-11-05

    申请人： LECO CORPORATION

    发明人： Pack, Brian W. ,  Guerra, Carlos ,  Willis, Peter Markel ,  Mitchell, Joel Carlton

    IPC分类号： G01N33/00 ,  G01N31/00 ,  G01N31/12

    CPC分类号： G01N31/12 ,  G01N33/0016 ,  Y10T436/17 ,  Y10T436/176152 ,  Y10T436/176921 ,  Y10T436/177692 ,  Y10T436/178459 ,  Y10T436/179228 ,  Y10T436/186 ,  Y10T436/20 ,  Y10T436/204998 ,  Y10T436/205831 ,  Y10T436/207497

    摘要： An analyzer compensates for gas flow perturbations by providing a makeup flow of carrier gas (60) to maintain the pressure and/or flow rate of analyte and inert gas through a detector (26) constant such that a accurate determination of a low concentration of an analyte in the presence of a high concentration of a second analyte can be accurately determined. In one embodiment, a carrier gas is introduced through a valve (64) responsive to the detected pressure (66) in the gas flow stream (65) between a scrubber (22) and a subsequent detector (26) for maintaining the pressure constant during an analysis. In another embodiment of the invention, a flow transducer (76) is positioned in the gas flow path between the scrubber (22) and detector (26) and coupled to a flow control valve coupled to introduce carrier gas as a function of detected gas flow such that the flow rate of gas into the detector is maintained constant.

    摘要翻译： 分析器通过提供载气（60）的补充流量来补偿气体流动扰动，以维持分析物和惰性气体通过检测器（26）的压力和/或流速恒定，使得精确测定低浓度的 在高浓度第二分析物存在下分析物可以被准确地确定。 在一个实施例中，响应于在洗涤器（22）和随后的检测器（26）之间的气体流（65）中的检测压力（66），通过阀（64）引入载气，以在 分析。 在本发明的另一个实施例中，流量传感器（76）被定位在洗涤器（22）和检测器（26）之间的气体流动路径中并且耦合到流量控制阀，该流量控制阀被耦合以引入作为检测到的气体流量的函数的载气 使得进入检测器的气体的流量保持恒定。