Vibration type measuring instrument
    61.
    发明授权
    Vibration type measuring instrument 失效
    振动式测量仪

    公开(公告)号:US5831178A

    公开(公告)日:1998-11-03

    申请号:US705343

    申请日:1996-08-29

    Abstract: A vibration type measuring instrument measures at least one of a mass flow rate and a density of a fluid flowing through a straight measurement pipe by vibrating the measurement pipe, obtains a frequency ratio of a resonant frequency of a first vibration mode to a resonant frequency of a second vibration mode of the measurement pipe, and corrects a measured value of at least one of the mass flow rate and the density according to the frequency ratio. The instrument includes a first vibration detector for detecting at least one of a vibration generated in the measurement pipe depending on the mass flow rate and the resonant frequency of the first vibration mode of the measurement pipe; and a second vibration detector for detecting the resonant frequency of the second vibration mode of the measurement pipe. The second vibration detector is provided around an antinode of the second vibration mode of the measurement pipe to improve the detection sensitivity in the second vibration mode.

    Abstract translation: 振动型测量仪器通过振动测量管来测量流过直线测量管的流体的质量流量和密度中的至少一个,获得第一振动模式的谐振频率与谐振频率的频率比 测量管的第二振动模式,并且根据频率比来校正质量流率和密度中的至少一个的测量值。 该仪器包括:第一振动检测器,用于根据质量流量和测量管的第一振动模式的共振频率来检测在测量管中产生的振动中的至少一个; 以及第二振动检测器,用于检测测量管的第二振动模式的共振频率。 第二振动检测器围绕测量管的第二振动模式的波腹设置,以提高第二振动模式下的检测灵敏度。

    Process for producing high resilience polyurethane foam
    68.
    发明授权
    Process for producing high resilience polyurethane foam 失效
    生产高强度聚氨酯泡沫的方法

    公开(公告)号:US5104907A

    公开(公告)日:1992-04-14

    申请号:US559348

    申请日:1990-07-30

    CPC classification number: C08G18/2027 C08G2101/0008

    Abstract: A process for producing a high resilience polyurethane foam by reacting a polyol with a polyisocyanate in the presence of a catalyst, a blowing agent, and a foam stabilizer; said polyisocyanate containing at least diphenylmethane diisocyanate and/or a mixture of diphenylmethane diisocyanate with a derivative thereof, the blowing agent being water, or water and a halogenated hydrocarbon in amounts of not less than 2 parts by weight of water and not more than 20 parts by weight of the halogenated hydrocarbon based on 100 parts by weight of the polyol, and the catalyst being at least one selected from the compounds represented by the formula (I) below: ##STR1## where R.sup.1 is alkyl having 1 to 4 carbons, dimethylaminopropyl, benzyl, vinyl, or hydroxyalkyl having 1 to 3 carbons; R.sup.2 is hydrogen, alkyl having 1 to 4 carbons, alkyl, benzyl or phenyl; and R.sup.3 and R.sup.4 are independently hydrogen, alkyl having 1 to 4 carbons, or hydroxymethyl.

    Disk cartridge with improved cleaning mechanism
    70.
    发明授权
    Disk cartridge with improved cleaning mechanism 失效
    磁盘盒具有改进的清洁机制

    公开(公告)号:US5006948A

    公开(公告)日:1991-04-09

    申请号:US243688

    申请日:1988-09-13

    CPC classification number: G11B23/0332 G11B23/505

    Abstract: A disk cartridge comprises a cartridge case including an upper case, a lower case and a head insertion aperture at a predetermined position, a pair of cleaning sheets respectively secured to inner surfaces of the upper and lower cases, a disk disposed rotatably between the cleaning sheets, and a resilient member disposed between at least one of the cases and associated cleaning sheet, the resilient member being adapted to press a part of the cleaning sheet against a disk surface, wherein the resilient member is disposed in the vicinity of the head insertion aperture and upstream of the head inserting port in the rotational direction of the disk, thereby enhancing the effect of cleaning of the disk surfaces to be read/written by the magnetic head.

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