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    • 6. 发明授权
    • Velocity measurement
    • 速度测量
    • US4516851A
    • 1985-05-14
    • US361841
    • 1982-03-26
    • John C. ParkerJames A. Blake
    • John C. ParkerJames A. Blake
    • G01P3/36G01S11/12
    • G01P3/36G01S11/12
    • Apparatus for measuring the velocity of, for example, an aircraft includes two optical units spaced a predetermined distance apart along an axis, there being a plurality of pairs of associated radiation detectors, with each pair of detectors having one detector in each unit, the planes of lines of sight of each pair of detectors extending parallel to each other, with these planes of different pairs of detectors being inclined relative to each other, in a measurement period, comparing means of the apparatus determining the delay between the forward and aft detectors of at least one pair of detectors receiving radiation from the same part of the same portion of the plane of a radiation source, such as the terrain, and from this determination the velocity being represented, the comparing means possibly comprising a known form of correlator, possibly provided by a digital computer, the computer possibly also providing axis transformation means within the apparatus.
    • 用于测量例如飞行器的速度的装置包括沿着轴间隔开预定距离的两个光学单元,存在多对关联的辐射检测器,每对检测器在每个单元中具有一个检测器, 每对检测器的视线彼此平行延伸,在测量期间,不同对的检测器的这些平面相对于彼此倾斜,该装置的比较装置确定前和后检测器之间的延迟 至少一对检测器接收来自辐射源的平面的相同部分的相同部分(例如地形)的辐射,并且从该确定表示的速度,可能包括已知形式的相关器的比较装置 由数字计算机提供,计算机也可能在设备内提供轴转换装置。
    • 8. 发明授权
    • Fast cycle plasticator/injector unit for molding machines
    • 用于成型机的快速循环塑化器/注射器单元
    • US5123833A
    • 1992-06-23
    • US678059
    • 1991-04-01
    • John C. Parker
    • John C. Parker
    • B29C45/54B29C45/58
    • B29C45/586B29C45/542
    • A fast cycle plasticator/injector unit for plastic molding machines having a screw type plasticating extruder for feeding thermoplastic material through a sealed fluid flow path to an accumulator which periodically feeds the thermoplastic material through a sealed fluid flow path to an injector that comprises a cylinder with an inlet and an outlet port and a powered piston valve element disposed for reciprocating axial and rotary motion within said cylinder and having a fluid flow channel along a portion of its length in cooperative structural relationship with said inlet port to provide an open fluid flow channel between the inlet port and the charge chamber of said cylinder when the piston is in a first rotational orientation and to block fluid flow from the inlet port to the cylinder when the piston is in a second rotational orientation.
    • 一种用于塑料成型机的快速循环塑化器/注射器单元,其具有用于将热塑性材料通过密封流体流动路径供给到蓄能器的螺杆式塑化挤出机,所述密封流体路径周期性地将热塑性材料通过密封流体流动路径馈送到包括具有 入口和出口以及动力活塞阀元件,其设置用于在所述气缸内往复运动的轴向和旋转运动,并具有沿其长度的与所述入口端口协调结构关系的一部分的流体流动通道, 当所述活塞处于第一旋转取向时,所述气缸的入口和所述充气室,以及当所述活塞处于第二旋转取向时阻止从所述入口到所述气缸的流体流动。