Method and apparatus for reducing error when measuring minute quantities of weight
    4.
    发明授权
    Method and apparatus for reducing error when measuring minute quantities of weight 有权
    测量微小重量时减少误差的方法和装置

    公开(公告)号:US06903281B2

    公开(公告)日:2005-06-07

    申请号:US10300985

    申请日:2002-11-21

    IPC分类号: G01G1/22 G01G21/22 G01G19/00

    CPC分类号: G01G1/22

    摘要: The invention relates to an instrument and method for measuring minute quantities of weight, including a pan for holding a sample to be weighed, a chamber for forming an enclosure about the pan, and a hang-down wire coupled to the pan for suspending the pan within the chamber. The pan has volume less than 0.020 cm3 and the hang-down wire has a volume less than 0.01 cm3. The invention may also include a carrier gas, placed within the chamber, having a generally consistent density over changes in temperature.

    摘要翻译: 本发明涉及一种用于测量微量重量的仪器和方法,包括用于保持待称取的样品的盘,用于在锅周围形成壳体的室,以及连接到锅的悬挂线,用于悬挂锅 在房间内 平底锅的体积小于0.020cm 3,吊挂线的体积小于0.01cm 3。 本发明还可以包括放置在腔室内的载气,其具有与温度变化大致一致的密度。

    Autosampler
    6.
    发明授权

    公开(公告)号:US06468475B1

    公开(公告)日:2002-10-22

    申请号:US09518466

    申请日:2000-03-03

    IPC分类号: G01N3502

    CPC分类号: G01N35/04 G01N35/0099

    摘要: An autosampler for manipulating a specimen container into and out of a furnace of a parent instrument is disclosed. The autosampler has upper, lower and middle gripping fingers which grip and stabilize a crimped wire, which has a large bend therein. The middle gripping finger is positioned between and opposed to the upper and lower gripping finger and has a portion at one end thereof sized and shaped to receive the bend of the crimped wire. The gripping fingers grip and hold the crimped wire while a tray table moves to place the specimen container on a hook at the bottom of the crimped wire. If the specimen container is sealed, a hole may be punctured therein by a puncturing apparatus, which has a housing which is movable between an upper and lower position and biased toward the lower position. A pin is positioned inside the housing. When the specimen tray moves into the upper position, the sealed specimen container moves the housing from the lower position to the upper position thereby exposing the pin and causing it to puncture the sealed specimen container. An electrostatic discharge device which includes a housing having a channel thereabout is also provided. A high voltage source is electrically connected to a pin positioned inside the housing and in fluid communication with the channel for supply voltage to the pin and generating multiple free ions as a result thereof. Pressurized gas directs the free ions toward an electrostatic field to neutralize the ions therein.

    Fluid conveying device with removable connection
    8.
    发明授权
    Fluid conveying device with removable connection 失效
    具有可拆卸连接的流体输送装置

    公开(公告)号:US5716082A

    公开(公告)日:1998-02-10

    申请号:US525975

    申请日:1995-09-07

    CPC分类号: F16L19/08 Y10S285/904

    摘要: A cryogenic fluid conveying device has removable connection of a metal tube and a receptor for the tube. The receptor is formed of a housing member with an aperture therein for conveying the fluid. A tubular member of resilient PTFE has a bore size so as to be slidingly receptive of the rigid tube. A ferrule is disposed on the tubular member which is positioned in the housing member. An annular nut is threaded onto an end of the housing to constrict the ferrule and thereby constrict an annular section of the tubular member. This constriction provides a sealingly tight fit for the rigid tube such that the metal tube can be inserted into and removed from the tubular member.

    摘要翻译: 低温流体输送装置具有用于管的金属管和受体的可移除连接。 接收器由其中具有用于输送流体的孔的壳体构件形成。 弹性PTFE的管状构件具有孔尺寸以便滑动地接受刚性管。 套管设置在管状构件上,该管状构件定位在壳体构件中。 环形螺母被拧到壳体的端部上以收缩套圈,从而收缩管状构件的环形部分。 这种收缩提供了用于刚性管的密封紧密配合,使得金属管能够插入管状构件中并从管状构件移除。