Coriolis type mass flow meter
    81.
    发明授权
    Coriolis type mass flow meter 失效
    科里奥利型质量流量计

    公开(公告)号:US5488870A

    公开(公告)日:1996-02-06

    申请号:US307260

    申请日:1994-09-16

    Abstract: Measurement of a mass flow rate is accomplished by equalizing the output amplitude values of upstream and downstream sensors without causing a lowering of the mechanical Q of a vibration system. One of the upstream and downstream sensors includes a permanent magnet disposed on a side of a tube and an induction coil disposed on a side of a base, the output voltage amplitude of which is fixed. Another sensor includes a ferromagnetic member disposed on the side of the tube and an excitation coil and an induction coil disposed on the side of the base. The output voltage amplitude of the induction coil is controlled to be coincident with the output voltage amplitude of the induction coil by adjusting a DC current flowing through the excitation coil.

    Abstract translation: 通过均衡上下游传感器的输出振幅值而不会导致振动系统的机械Q的降低来实现质量流量的测量。 上游和下游传感器中的一个包括设置在管侧的永磁体和设置在基座侧的感应线圈,其输出电压振幅是固定的。 另一传感器包括设置在管侧的铁磁部件和设置在基座一侧的励磁线圈和感应线圈。 感应线圈的输出电压振幅通过调节流过励磁线圈的直流电流而被控制为与感应线圈的输出电压振幅一致。

    Process for producing flexible polyurethane foam having high air flow
property
    83.
    发明授权
    Process for producing flexible polyurethane foam having high air flow property 失效
    具有高空气流动性的柔性聚氨酯泡沫塑料的制造方法

    公开(公告)号:US5306738A

    公开(公告)日:1994-04-26

    申请号:US17437

    申请日:1993-02-12

    CPC classification number: C08G18/2027 C08G2101/0008 C08G2101/0083

    Abstract: Process for producing a flexible polyurethane foam through reaction of a polyol with a polyisocyanate in the presence of an amine catalyst, a blowing agent, and a foam stabilizer, the amine catalyst comprising at least one of the imidazoles represented by the general formula below: ##STR1## wherein R.sup.1 is alkyl of 1 to 4 carbons, dimethylaminopropyl, benzyl, vinyl, or hydroxyalkyl of 1 to 3 carbons; R.sup.2 is hydrogen, alkyl of 1 to 4 carbons, allyl, benzyl, or phenyl; and R.sup.3 and R.sup.4 are respectively hydrogen, alkyl of 1 to 4 carbons, or hydroxymethyl.

    Abstract translation: 在胺催化剂,发泡剂和泡沫稳定剂的存在下通过多元醇与多异氰酸酯的反应制备软质聚氨酯泡沫的方法,所述胺催化剂包含由以下通式表示的至少一种咪唑:( *化学结构*)其中R 1为1至4个碳的烷基,二甲基氨基丙基,苄基,乙烯基或1至3个碳的羟烷基; R2是氢,1至4个碳的烷基,烯丙基,苄基或苯基; R3和R4分别为氢,1〜4个碳的烷基或羟甲基。

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