Fume hood air flow control
    1.
    发明授权
    Fume hood air flow control 失效
    通风柜空气流量控制

    公开(公告)号:US4741257A

    公开(公告)日:1988-05-03

    申请号:US690093

    申请日:1985-01-09

    IPC分类号: B08B15/02 F24F11/75 G05D16/18

    摘要: A control system is provided for providing a constant flow of air through a chamber, such as a fume hood, by measuring the pressure of the air outside of the hood and comparing it with the pressure of the air within the hood and adjusting the flow of air to achieve a constant pressure difference. The system is particularly applicable to fume hoods which have a sash which can be opened or closed or left in intermediate position; the present system will provide a constant air flow through the hood regardless of the sash position.

    摘要翻译: 提供一种控制系统,用于通过测量罩外空气的压力并将其与罩内的空气的压力进行比较,并且调整流动的流量来提供恒定的空气流通过诸如通风柜的室 空气达到恒定的压力差。 该系统特别适用于具有可打开或关闭或留在中间位置的窗框的通风橱; 本系统将提供通过发动机罩的恒定气流,而不管窗扇位置如何。

    Combined mass flow/pitot tube meter
    2.
    发明授权
    Combined mass flow/pitot tube meter 失效
    组合质量流量/皮托管表

    公开(公告)号:US4959990A

    公开(公告)日:1990-10-02

    申请号:US335225

    申请日:1989-04-10

    申请人: Robert H. Morris

    发明人: Robert H. Morris

    摘要: A mass flow meter probe having an upstream tube and a downstream tube that extends into a main gas flow conduit is disclosed. The sensor for the mass flow measurement is located in the bore of a housing connecting the tubes and by incorporating the sensor into a valve that can block flow between the tubes, the mass flow meter can be calibrated in the field. The probe can be used as differential pressure device for flow measurments, when the valve is closed. A means for cleaning pressure ports is also disclosed.

    摘要翻译: 公开了一种具有延伸到主气流导管中的上游管和下游管的质量流量计探针。 用于质量流量测量的传感器位于连接管的壳体的孔中,并且通过将传感器并入可阻止管之间的流动的阀,可以在现场校准质量流量计。 当阀关闭时,探头可用作流量测量的差压装置。 还公开了一种用于清洁压力端口的装置。

    IRON(II) CATALYSTS CONTAINING DIIMINO-DIPHOSPHINE TETRADENTATE LIGANDS AND THEIR SYNTHESIS
    3.
    发明申请
    IRON(II) CATALYSTS CONTAINING DIIMINO-DIPHOSPHINE TETRADENTATE LIGANDS AND THEIR SYNTHESIS 有权
    铁(II)含有二胺 - 二氢吡啶四氢化物配体的催化剂及其合成

    公开(公告)号:US20100145087A1

    公开(公告)日:2010-06-10

    申请号:US12609955

    申请日:2009-10-30

    摘要: New hexa-coordinate iron (II) complexes comprising compounds of formula (I) are described. These compounds comprise a tetradentate ligand with donor atoms comprising nitrogen and phosphorus. These complexes are shown for the first time to be useful catalysts for the hydrogenation of ketones, aldehydes, or imines to produce alcohols or amines, and the asymmetric hydrogenation of prochiral ketones or imines to produce non-racemic alcohols or amines. The source of the hydrogen can be hydrogen gas or a hydrogen-donating molecule such as isopropanol or hydrogen-donating mixture such as formic acid and an amine depending on the structure of the catalyst. In certain embodiments, the axial ligands on the catalyst comprise organonitrile ligands, carbonyl ligands, isonitrile ligands, or combinations thereof. The catalysts and the preparation thereof are disclosed. A reaction using phosphine and diamine precursors that is templated by the iron ion is the preferred route to the catalysts.

    摘要翻译: 描述了包含式(I)化合物的新的六配位铁(II)络合物。 这些化合物包括具有包含氮和磷的供体原子的四齿配体。 这些配合物首次显示为用于氢化酮,醛或亚胺以制备醇或胺的有用催化剂,以及前手性酮或亚胺的不对称氢化以产生非外消旋醇或胺。 根据催化剂的结构,氢源可以是氢气或供氢分子如异丙醇或供氢混合物如甲酸和胺。 在某些实施方案中,催化剂上的轴向配体包含有机腈配体,羰基配体,异腈配体或其组合。 公开了催化剂及其制备方法。 使用由铁离子模板化的膦和二胺前体的反应是催化剂的优选途径。

    Apparatus and method to optimize fume containment by a hood
    4.
    发明授权
    Apparatus and method to optimize fume containment by a hood 失效
    通过罩优化烟雾容纳的装置和方法

    公开(公告)号:US6131463A

    公开(公告)日:2000-10-17

    申请号:US918408

    申请日:1997-08-26

    申请人: Robert H. Morris

    发明人: Robert H. Morris

    IPC分类号: F24F7/00 F24F11/04 G01L7/00

    摘要: A system for optimizing the flow of air through a fume hood by dynamically controlling the air flow to provide a stable vortex in the vortex chamber of the hood, the optimum condition for minimizing backflow of fume-laden air through the hood doorway. A highly-sensitive pressure sensor disposed at a critical location in the vortex chamber sidewall senses minute variations in vortex pressure indicative of turbulence and sends signals via a transducer to an analog controller which uses proportional integral and adaptive gain algorithms to formulate output signals to an actuator which adjusts dampers in the hood to change the airflow into the vortex. The system operates in feedback mode and seeks a minimum in the amplitude of the sidewall pressure variations, indicating that turbulence has been eliminated and that a stable vortex exists. The pressure sensor signals can also be directed to an alarm to signal an off-standard and potentially dangerous condition.

    摘要翻译: 通过动态地控制空气流量以在发动机罩的涡流室中提供稳定的涡流来优化通过通风橱的空气流的系统,这是使通过发动机罩门口的含烟空气回流最小化的最佳条件。 设置在涡流室侧壁的关键位置的高灵敏度的压力传感器感测到指示湍流的涡流压力的微小变化,并且经由换能器将信号发送到模拟控制器,该模拟控制器使用比例积分和自适应增益算法来将输出信号配置到致动器 其调节罩中的阻尼器以将气流改变成涡流。 该系统在反馈模式下工作,并且寻求侧壁压力变化幅度的最小值,表明湍流已被消除并且存在稳定的涡流。 压力传感器信号也可以被引导到报警器来发出标准的和潜在的危险的状况。

    Rotary actuator
    5.
    发明授权
    Rotary actuator 失效
    旋转执行机构

    公开(公告)号:US4134306A

    公开(公告)日:1979-01-16

    申请号:US724962

    申请日:1976-09-20

    IPC分类号: F01B19/00 F15B15/08 F16H19/04

    摘要: A rotary actuator for converting reciprocating motion to rotary motion including a housing having spaced-apart end plates connected by guide rods. A bellows is provided having opposite sides one of which is connected to one of the end plates, the bellows being adapted to be connected to a source of fluid under pressure so that the bellows expands from a collapsed to an expanded position. A guide plate is provided movably mounted on the guide rods with the other bellows side being connected thereto. A rack and pinion assembly is provided mounted on the other end plate, the rack being connected to the guide plate so that expansion and contraction of the bellows causes linear movement of the rack thereby imparting rotary movement to the pinion. A spring acts between the guide plate and the other end plate thus resisting expansion of the bellows and returning it to the collapsed position upon the release of fluid pressure. Adjustable stops are provided for limiting rotational movement of the pinion between predetermined first and second angularly spaced positions.

    摘要翻译: 用于将往复运动转换成旋转运动的旋转致动器,包括具有通过导杆连接的间隔开的端板的壳体。 一个波纹管被设置成具有相对的侧面,其中一个连接到一个端板,波纹管适于在压力下连接到流体源,使得波纹管从折叠膨胀到膨胀位置。 引导板可移动地安装在引导杆上,另一个波纹管侧与其连接。 提供安装在另一端板上的齿条和小齿轮组件,齿条连接到引导板,使得波纹管的膨胀和收缩导致齿条的线性运动,从而向小齿轮提供旋转运动。 弹簧作用在导板和另一端板之间,从而抵抗波纹管的膨胀并且在释放流体压力时将其返回到收缩位置。 提供可调止动件用于限制小齿轮在预定的第一和第二角度间隔位置之间的旋转运动。

    Apparatus and method to optimize fume containment by a hood
    7.
    发明授权
    Apparatus and method to optimize fume containment by a hood 失效
    通过罩优化烟雾容纳的装置和方法

    公开(公告)号:US5697838A

    公开(公告)日:1997-12-16

    申请号:US658033

    申请日:1996-06-04

    申请人: Robert H. Morris

    发明人: Robert H. Morris

    IPC分类号: B08B15/02 F24F7/00 F24F11/04

    摘要: A system for optimizing the flow of air through a fume hood by dynamically controlling the air flow to provide a stable vortex in the vortex chamber of the hood, the optimum condition for minimizing backflow of fume-laden air through the hood doorway. A highly-sensitive pressure sensor disposed at a critical location in the vortex chamber sidewall senses minute variations in vortex pressure indicative of turbulence and sends signals via a transducer to an analog controller which uses proportional integral and adaptive gain algorithms to formulate output signals to an actuator which adjusts dampers in the hood to change the airflow into the vortex. The system operates in feedback mode and seeks a minimum in the amplitude of the sidewall pressure variations, indicating that turbulence has been eliminated and that a stable vortex exists. The pressure sensor signals can also be directed to an alarm to signal an off-standard and potentially dangerous condition.

    摘要翻译: 通过动态地控制空气流量以在发动机罩的涡流室中提供稳定的涡流来优化通过通风橱的空气流的系统,这是使通过发动机罩门口的含烟空气回流最小化的最佳条件。 设置在涡流室侧壁的关键位置的高灵敏度的压力传感器感测到指示湍流的涡流压力的微小变化,并且经由换能器将信号发送到模拟控制器,该模拟控制器使用比例积分和自适应增益算法来将输出信号配置到致动器 其调节罩中的阻尼器以将气流改变成涡流。 该系统在反馈模式下工作,并且寻求侧壁压力变化幅度的最小值,表明湍流已被消除并且存在稳定的涡流。 压力传感器信号也可以被引导到报警器来表示标准的和潜在的危险的状况。

    Process for hydrogenating unactivated imines using ruthenium complexes as catalysts
    8.
    发明授权
    Process for hydrogenating unactivated imines using ruthenium complexes as catalysts 失效
    使用钌配合物作为催化剂氢化未活化的亚胺的方法

    公开(公告)号:US07256311B2

    公开(公告)日:2007-08-14

    申请号:US10513321

    申请日:2003-05-15

    IPC分类号: C07C209/52

    摘要: A process is provided for the hydrogenation or asymmetric hydrogenation of dialkyl, alkylalkenyl and dialkenyl imines of formula (II) to provide amines of formula (III), wherein, (i) R1 and R2 are optionally substituted cyclic, linear or branched alkyl or alkenyl; R3 is a hydrogen atom, a hydroxy radical, optionally substituted C1 to C8 cyclic, linear or branched alkyl or alkenyl, optionally substituted aryl; or (ii) R1 is alkyl or alkenyl, R2 is alkyl or alkenyl and the two are linked together or with R3 to form one or more rings; using a catalytic system comprising a base and a ruthenium complex containing (1) a diamine and (2) a diphosphine ligand or monodentate phosphine ligands in hydrogenation and asymmetric hydrogenation processes

    摘要翻译: 提供了用于氢化或不对称氢化式(II)的二烷基,烷基烯基和二烯丙基亚胺以提供式(III)的胺的方法,其中,(i)R 1和R 2 2是任选取代的环状,直链或支链烷基或烯基; R 3是氢原子,羟基,任选取代的C 1至C 8环,直链或支链烷基或链烯基,任选取代的 芳基; 或(ii)R 1是烷基或链烯基,R 2是烷基或链烯基,并且两者连接在一起或与R 3连接形成 一个或多个戒指; 使用包含碱和钌络合物的催化体系,所述催化体系包含(1)二胺和(2)氢化和不对称氢化方法中的二膦配体或单齿膦配体

    Fume hood having a bi-stable vortex
    9.
    发明授权
    Fume hood having a bi-stable vortex 失效
    具有双稳态涡流的通风柜

    公开(公告)号:US5924920A

    公开(公告)日:1999-07-20

    申请号:US7422

    申请日:1998-01-15

    IPC分类号: B08B15/02

    CPC分类号: B08B15/023

    摘要: The flow of air through a fume hood is optimized by producing a bi-stable vortex within the vortex chamber of the fume hood regardless of sash movement. A bi-stable fume hood optimizes capture face velocity to minimize backflow of fume laden air through the hood sash opening. This bi-stable vortex fume hood reduces the energy consumption up to sixty percent versus the present day mono-stable vortex fume hoods. The bi-stable vortex fume hood utilizes a vortex pressure control system to reposition top, center, and bottom slot openings of a baffle in the hood. This baffle moves the bi-stable vortex away from the fact when the sash is fully opened and creates a clearing action near the work surface as the sash is closed. The fume hood's airfoil is placed inside the fume hood chamber and the airfoil has multiple entry pattern, one of which turns the vortex up and away from the open sash window. The other creates flow which washes the work surface of the hood. The interior portion of the vortex chamber utilizes a turning vane in order to decrease dynamic losses and increase bi-stable vortex stability.

    摘要翻译: 通过通风柜的空气流动通过在通风橱的涡流室内产生双稳态涡流而优化,而不管窗扇运动如何。 双稳态通风橱优化捕获面速度,以最大限度地减少吸烟烟气回流通过罩带窗口。 这种双稳态涡流通风机与目前的单稳态涡街通风机相比,能耗降低了百分之六十。 双稳态涡流罩采用涡流压力控制系统来重新定位罩中挡板的顶部,中心和底部槽口。 当挡板完全打开时,这个挡板将双稳态涡流移动离开事实,当窗扇关闭时,会在工作表面附近产生清除动作。 通风柜的翼型放置在通风橱室内,翼型具有多个入口模式,其中一个将涡流向上旋转并远离开放的窗框。 另一个产生洗涤罩的工作表面的流动。 涡流室的内部使用转动叶片,以减少动态损耗并增加双稳态涡流稳定性。