Process and apparatus for supplying gas to a very highly sensitive
analyzer
    1.
    发明授权
    Process and apparatus for supplying gas to a very highly sensitive analyzer 失效
    用于向非常高灵敏度的分析仪提供气体的方法和设备

    公开(公告)号:US5305630A

    公开(公告)日:1994-04-26

    申请号:US760977

    申请日:1991-09-17

    CPC分类号: G01N33/0006 G01N33/0018

    摘要: The line of gas to be analyzed, the "zero" gas line and calibration gas line are each provided with a restriction operating in sonic rate supplying a nominal constant flow and downstream, have a discharge duct provided with a flow regulator. The nominal flows in the first and second lines are higher than the given flow supplied to the analyzer so that during each of the calibration and analysis steps, the whole of the circuit portion of the device is permanently flushed with the nominal gas of the line and/or by a portion of the recirculated flow of gas originating from another line.

    摘要翻译: 要分析的气体管线,“零”气体管线和校准气体管线各自具有以提供标称恒定流量和下游的声速操作的限制,具有设置有流量调节器的排放管道。 第一和第二行中的额定流量高于供应给分析仪的给定流量,因此在每个校准和分析步骤期间,设备的整个电路部分都会永久地用管线的标称气体冲洗, /或通过来自另一条管线的再循环气体流的一部分。

    Device for supplying a pipe with a fluid at a particular pressure from
alternative sources
    2.
    发明授权
    Device for supplying a pipe with a fluid at a particular pressure from alternative sources 失效
    用于向来自替代源的特定压力的流体提供管道的装置

    公开(公告)号:US4597406A

    公开(公告)日:1986-07-01

    申请号:US598750

    申请日:1984-04-10

    IPC分类号: F17C7/00 F17C13/04

    摘要: An installation for the delivery of a gas of high purity under a constant pressure from either of two vessels each of which is connected to a utilization outlet via a separate supply pipe and a switching system. A switching control system acts on two high-pressure valves, one for each vessel, downstream of which is situated a single pressure regulator which controls the outlet gas pressure. The valves are actuated by an auxiliary low-pressure gas via a pneumatic memory and two detectors measuring the pressure prevailing in the two gas vessels.

    摘要翻译: 一种用于在恒定压力下从两个容器中的任一个输送高纯度气体的装置,每个容器通过单独的供应管和开关系统连接到利用出口。 开关控制系统作用于两个高压阀,每个容器一个,其下游位于控制出口气体压力的单个压力调节器。 阀门由辅助低压气体通过气动记忆器和两个检测器测量两个气体容器中的压力。

    Tap for a cylinder of gas under pressure
    3.
    发明授权
    Tap for a cylinder of gas under pressure 失效
    在压力下点燃气瓶

    公开(公告)号:US4815692A

    公开(公告)日:1989-03-28

    申请号:US168684

    申请日:1988-03-16

    摘要: The tap for a cylinder of gas under pressure is of the type comprising a body adapted to be fixed on a cylinder head (9) with a gas flow passage (10-13) provided with a valve (12) having a rod (14) slidable through a sealing bellows (17) and connected to a rod (21) of a pneumatic control piston (24) with provision of an opposing spring (28) for biasing the piston to a position for closing the valve (12). Manual means (31-32-33) are provided for axially shifting the piston (24) with an abutment in a position for closing the valve (12). The tap is particularly adapted to the transfer of gases having degrees of toxicity.

    摘要翻译: 用于压力气瓶的龙头是包括适于固定在气缸盖(9)上的主体的类型,气体流路(10-13)设置有具有杆(14)的阀(12) 可滑动通过密封波纹管(17)并且连接到气动控制活塞(24)的杆(21),其具有用于将活塞偏置到用于关闭阀(12)的位置的相对弹簧(28)。 提供手动装置(31-32-33),用于将活塞(24)与邻接件轴向移动在用于关闭阀(12)的位置。 水龙头特别适用于具有毒性程度的气体的转移。

    Gas regulating valve
    4.
    发明授权
    Gas regulating valve 失效
    气体调节阀

    公开(公告)号:US4781216A

    公开(公告)日:1988-11-01

    申请号:US152835

    申请日:1988-02-05

    IPC分类号: F16K41/10 G05D7/06 F16K11/02

    摘要: In a gas flow regulating valve, the needle (37) axially shifted by a rod (40) includes a recess (70) which is of variable depth and cooperates with an expanding sealing element (43). The valve is provided with a safety closure means comprising a valve member (33) which has a spring (35) and whose displacements are controlled by a free connection tube (30).

    摘要翻译: 在气流调节阀中,通过杆(40)轴向移动的针(37)包括可变深度的凹部(70),并与膨胀密封元件(43)配合。 阀设置有安全闭合装置,其包括具有弹簧(35)的阀构件(33),并且其位移由自由连接管(30)控制。

    5-Methylthio-pyrimidine vasodilators
    5.
    发明授权
    5-Methylthio-pyrimidine vasodilators 失效
    5-甲硫基 - 嘧啶血管扩张剂

    公开(公告)号:US3968214A

    公开(公告)日:1976-07-06

    申请号:US406129

    申请日:1973-10-12

    摘要: The compounds of the formula: ##SPC1##In which Y represents a chlorine atom or an alkoxy, dialkylaminoalkoxy, pyridylalkoxy group, R.sub.1 and R.sub.2 are identical or different substituents and represent alkyl or alkoxycarbonylalkyl groups, substituted or unsubstituted phenyl groups or form together with the nitrogen atom to which they are attached, a heterocyclic ring which may contain another hetero-atom, R.sub.3 and R.sub.4 are identical or different substituents and represent alkyl groups or form, together with the nitrogen atom to which they are attached, a heterocyclic ring which may contain another hetero-atom; process for their preparation; medicaments comprising such compounds or salts thereof, and their use in the treatment of human beings.The present invention relates to new pyrimidines, to their use as medicaments on account of their spasmolytic, coronary dilator and hypoglycemiant properties and to their preparation.These compounds, derived from 5-methylthio-pyrimidine, may be represented by the general formula: ##SPC2##In which Y represents a chlorine atom or an alkoxy, dialkylaminoalkoxy or pyridylalkoxy group, the alkoxy and alkyl groups preferably containing 1 to 4 carbon atoms, R.sub.1 and R.sub.2 are identical or different substituents and represent alkyl, alkoxycarbonylalkyl, substituted or unsubstituted phenyl or benzyl groups or form, together with the nitrogen atom to which they are attached, a heterocyclic ring which may contain another hetero-atom, the alkyl and alkoxy groups preferably containing 1 to 4 carbon atoms, R.sub.3 and R.sub.4 are identical or different substituents and represent alkyl groups preferably containing 1 to 4 carbon atoms or form, together with the nitrogen atom to which they are attached, a heterocyclic ring which may possibly contain another hetero-atom.Substituents of the phenyl group may be for example halogen atoms or alkyl, alkoxy or trihalomethyl groups.The compounds of formula (I) may be prepared for example by reacting a compound of the formula: ##SPC3##In which R.sub.1 and R.sub.2 have the same significance as above, with an ethylenediamine of the formula: ##EQU1## in which R.sub.3 and R.sub.4 have the same significance as above, and possibly replacing the remaining chlorine atom by an alkoxy, dialkylamino-alkoxy or pyridylalkoxy group.The reaction with the compound of formula (III) is preferably effected in a solvent, in the presence of an acid-absorbing agent, at a temperature between 20.degree.C. and 100.degree.C.The substitution of the remaining chlorine atom may be effected for example by the action of an alcoholate of an alkali metal or by the action of an excess of the corresponding alcohol and caustic potash at the refluxing temperature.

    摘要翻译: 下式的化合物: