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    Continuous process for preparing poly(butylene terephthalate) oligomer or poly(butylene isophthalate) oligomer
    1.
    发明授权
    Continuous process for preparing poly(butylene terephthalate) oligomer or poly(butylene isophthalate) oligomer 失效
    制备聚（对苯二甲酸丁二醇酯）低聚物或聚（邻苯二甲酸丁二醇酯）低聚物的连续方法

    公开(公告)号：US5064935A

    公开(公告)日：1991-11-12

    申请号：US561468

    申请日：1990-08-01

    申请人： Roy Jackson ,  David J. Lowe ,  Clare A. Stewart

    发明人： Roy Jackson ,  David J. Lowe ,  Clare A. Stewart

    IPC分类号： C08G63/183 ,  C08G63/78

    CPC分类号： C08G63/78

    摘要： Economic and efficient process for preparing an oligomer of poly(butylene terephthalate) or an oligomer of poly(butylene isophthalate) from a transesterification reaction mass by using a countercurrent column reactor system wherein the transesterification reaction mass is fed into the countercurrent column reactor and continuously flows downward while simultaneously a heated inert gas stream continuously flows upward to scrub out volatiles from the transesterification reaction mass, thereby yielding from the bottom of the countercurrent column reactor an oligomer of poly(butylene terephthalate) or an oligomer of poly(butylene isophthalate) suitable for use in a polycondensation reaction. Butanediol is recycled throughout the process through an absorber column.

    Chart recorders
    8.
    再颁专利
    Chart recorders 失效
    图表记录器

    公开(公告)号：USRE31896E

    公开(公告)日：1985-05-21

    申请号：US400546

    申请日：1982-01-21

    申请人： David J. Lowe

    发明人： David J. Lowe

    IPC分类号： G01D9/14 ,  G01R19/12

    CPC分类号： G01R19/12 ,  G01D9/14

    摘要： In a potentiometric chart recorder, the speed of the chart motor 22 is, in one mode of operation (AUTO) selected by a switch 32, varied between two values in dependence upon the rate of change or slope of the input signal at 10 as detected in a detector 30. The slow speed is obtained by intermittent operation at the fast speed, and during the non-operative periods power-consuming circuitry e.g. 16, 18, 26 is switched off by a switch 40.

    CLEANING APPARATUS WITH ROTATING AND DETACHABLE BRUSH HEAD
    9.
    发明申请
    CLEANING APPARATUS WITH ROTATING AND DETACHABLE BRUSH HEAD 审中-公开
    清洁装置与旋转和可拆卸的刷头

    公开(公告)号：US20120192366A1

    公开(公告)日：2012-08-02

    申请号：US13499821

    申请日：2010-10-06

    申请人： Aaron D. Cobabe ,  Kenneth W. Thiess ,  David J. Lowe ,  David O. Meyers

    发明人： Aaron D. Cobabe ,  Kenneth W. Thiess ,  David J. Lowe ,  David O. Meyers

    IPC分类号： A46B13/02 ,  A47L13/17 ,  A46B15/00 ,  A47L13/10

    CPC分类号： A46B13/02 ,  A46B7/04 ,  A46B13/008

    摘要： A cleaning apparatus includes an elongated housing bounding a chamber with a motor disposed therein. A drive shaft is at least partially disposed within the chamber of the housing, the drive shaft being coupled with the motor such that during selective operation of the motor the drive shaft is rotated continuously. A brush head having a scrubbing element is removably coupled with the drive shaft such that rotation of the drive shaft facilitates rotation of the brush head.

    摘要翻译： 清洁设备包括细长的壳体，其围绕设置在其中的电动机的一个室。 驱动轴至少部分地设置在壳体的腔室内，驱动轴与马达联接，使得在马达的选择性操作期间驱动轴连续地旋转。 具有擦洗元件的刷头可拆卸地与驱动轴联接，使得驱动轴的旋转有助于刷头的旋转。