Wellhead shut-off valve
    4.
    发明授权
    Wellhead shut-off valve 失效
    井下关阀

    公开(公告)号:US3987846A

    公开(公告)日:1976-10-26

    申请号:US592845

    申请日:1975-07-03

    CPC classification number: E21B33/08 E21B34/12 E21B43/127 F04B53/144

    Abstract: An improved sucker rod pumping system for an oil well includes a valve member mounted in the rod string, a valve seat formed in the wellhead, and means for moving the rod string upwardly to cause the valve member to sealingly engage the valve seat. The valve member is located on the rod string such that during normal pumping operation, it will not contact the valve seat or otherwise interfere with the pumping operations. When it is desired to close in the well or inject a fluid therein, the rod string is elevated above its normal stroke until the valve member sealingly engages the valve seat.

    Plotter
    9.
    发明授权
    Plotter 失效
    绘图仪

    公开(公告)号:US4384298A

    公开(公告)日:1983-05-17

    申请号:US358551

    申请日:1982-03-16

    CPC classification number: G01D9/40 G01D15/24 G03G2215/0183

    Abstract: An X-Y recorder for high speed plotting on a plain web, i.e., a web without registration holes or other special means to maintain alignment of the web during plotting. Two embodiments of these plotters are disclosed with one degree of motion being achieved by moving the web and the second degree of motion being obtained by moving a pen assembly substantially perpendicularly to the movement of the web. To enhance the repeatability of the plotting on the web as it is moved back and forth, a random rough surfaced drive wheel assembly is included with that wheel surface making indentations along one surface of the driven edge of the web as it is first passed through the drive wheel assembly. Then as the web is reversed, these indentations substantially remesh with the random rough surface of the drive wheels.

    Abstract translation: 一种X-Y记录仪,用于在普通纸幅上进行高速绘图,即,没有记录孔的纸幅或其他特殊装置,以在绘图期间保持幅材的对准。 公开了这些绘图机的两个实施例,其中一个程度的运动是通过移动卷筒纸而获得的,而第二运动程度是通过基本上垂直于卷筒纸的运动移动笔组件而获得的。 为了提高在网上移动的绘图的重复性,随机的粗糙表面的驱动轮组件被包括在该轮表面中,沿着幅材的从动边缘的一个表面进行压痕,因为它首先通过 驱动轮总成。 然后当网反向时,这些压痕基本上与驱动轮的随机粗糙表面重新组合。

    Mechanism for engaging and disengaging printed circuit board connectors
    10.
    发明授权
    Mechanism for engaging and disengaging printed circuit board connectors 失效
    用于接合和分离印刷电路板连接器的机构

    公开(公告)号:US06409526B1

    公开(公告)日:2002-06-25

    申请号:US09678079

    申请日:2000-10-03

    CPC classification number: H01R13/621

    Abstract: A mechanism for use in insertion and extraction of a first printed circuit board (PCB) to and from a second PCB so as to engage and disengage an electrical connector of the first PCB to and from a corresponding electrical connector of the second PCB. The insertion and extraction mechanism includes a stiffener bar and a mounting block. The stiffener bar is affixed to the first PCB immediately adjacent to the electrical connector for stiffening the first PCB in the vicinity of the electrical connector. The mounting block is affixed to the second PCB immediately adjacent to the corresponding electrical connector. A threaded fastener is carried by the stiffener bar and is engageable with the mounting block. Rotation of the fastener in a first direction causes the first PCB to be inserted to the second PCB which causes the electrical connector to be engaged with the corresponding electrical connector. Rotation of the fastener in a second direction causes the first PCB to be extracted from the second PCB which causes the electrical connector to be disengaged from the corresponding electrical connector. An alignment pin of the stiffener bar is engageable with an alignment opening in the mounting block to insure that the electrical connector and the corresponding electrical connector are properly aligned during insertion and extraction of the first PCB to and from the second PCB.

    Abstract translation: 一种用于将第一印刷电路板(PCB)插入和从第二PCB插入并从第二PCB提取的机构,以便将第一PCB的电连接器与第二PCB的对应的电连接器接合和分离。 插入和取出机构包括加强筋和安装块。 加强筋固定到紧邻电连接器的第一PCB上,用于在电连接器附近加强第一PCB。 安装块固定到紧邻相应的电连接器的第二PCB上。 螺纹紧固件由加强筋承载并且可与安装块接合。 紧固件沿第一方向的旋转使得第一PCB插入第二PCB,这使得电连接器与相应的电连接器接合。 紧固件沿第二方向的旋转使得第一PCB从第二PCB提取,这使得电连接器与相应的电连接器脱离接合。 加强筋的对准销可与安装块中的对准开口接合,以确保在将第一PCB插入和从第二PCB插入和取出期间,电连接器和相应的电连接器正确对准。

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