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    Electronic equipment simulated earthquake survivability test system and method
    22.
    发明授权
    Electronic equipment simulated earthquake survivability test system and method 失效
    电子设备模拟地震生存能力试验系统及方法

    公开(公告)号：US06876957B1

    公开(公告)日：2005-04-05

    申请号：US09752505

    申请日：2000-12-27

    申请人： Thomas Stewart

    发明人： Thomas Stewart

    IPC分类号： G01M7/02 ,  G06G7/48

    CPC分类号： G01M7/022

    摘要： The present invention is a transient vibration time history testing calibration system and method that assists testing equipment reproduce predefined earthquake synthesized waveforms within acceptable parameters. Adjustments are made to forces applied to the equipment under test (EUT) so that the acceleration of the EUT corresponds to a predetermined acceleration time history waveform. Information associated with the acceleration time history waveform is loaded in a controller which produces shaker drive signals that control movements of a shaker. Two waveform tests are run at an attenuated value (e.g., −3 dB) of a full level test on a dummy load. The acceleration of the dummy load is measured and adjustments are made to update the drive signals if the TRS is not within acceptable tolerances of the RRS. The adjustments are projected to provide shaker drive signals that shake the EUT within acceptable ranges of a RRS. Then a waveform test is run at full strength with the dummy load and the dummy load movements are measured. If the projected TRS for the equipment under test is not within acceptable tolerances of the RRS further adjustments calculated to bring the TRS within acceptable range of the RRS are made to the shaker drive signals. A waveform test is then performed on the EUT at an attenuated value and if the TRS is not projected to be within acceptable tolerances of an RRS for a full strength test, more adjustments are made to the shaker drive signals.

    摘要翻译： 本发明是一种瞬态振动时间历史测试校准系统和方法，其辅助测试设备在可接受的参数内再现预定的地震合成波形。 对施加到被测设备（EUT）的力进行调整，使得EUT的加速度对应于预定的加速时间历史波形。 与加速时间历史波形相关联的信息被加载到控制器中，该控制器产生用于控制摇动器的运动的振动器驱动信号。 两个波形测试以虚拟负载的全级测试的衰减值（例如-3dB）运行。 测量虚拟负载的加速度，并且如果TRS不在RRS的可接受公差内，则进行调整以更新驱动信号。 预计这些调整将提供摇动驱动信号，使EUT在RRS的可接受范围内摇动。 然后，在假负载下进行波形测试，并测量虚拟负载运动。 如果被测设备的预计TRS不在RRS的可接受公差范围内，则将TRS置于RRS可接受范围内的进一步调整计算为振荡器驱动信号。 然后以衰减值对EUT进行波形测试，如果TRS未被投影到全强度测试的RRS可接受的公差内，则对振荡器驱动信号进行更多的调整。

    Collapsible hitch
    25.
    发明授权
    Collapsible hitch 失效
    可折叠搭接

    公开(公告)号：US5054804A

    公开(公告)日：1991-10-08

    申请号：US530645

    申请日：1990-05-30

    申请人： Thomas Stewart

    发明人： Thomas Stewart

    IPC分类号： B61D45/00

    CPC分类号： B61D45/005

    摘要： A king pin locking plate assembly having a locking plate provided on the underside with a pair of cooperating jaws pivotally supported under the locking plate and being urged into open position by a spring member positioned between the two jaws, the two jaws having a frontal portion facing a king pin, the frontal portion defining a lock surface which is adapted to be abutted by a free end of a jaw lock pivotally supported in the king pin receiving slot by a pivot which engages a bifurcated end of the jaw lock. A jaw lock stop is situated in the bifurcated end of the jaw lock and, because of its internal elongated opening, is capable of maintaining the jaw lock in either a king pin securing position or in a king pin releasing position.

    摘要翻译： 主销锁定板组件，其具有设置在下侧上的锁定板，其具有可枢转地支撑在锁定板下方的一对协作夹爪，并且由位于两个钳口之间的弹簧构件推动到打开位置，所述两个钳口具有面向 主销，前部部分限定锁定表面，该锁定表面适于由枢转地支撑在主销接收槽中的爪锁定件的自由端邻接，该枢轴接合爪钳的分叉端。 颚锁止动件位于颚锁的分叉端，并且由于其内部细长的开口，能够将钳口锁定在主销固定位置或处于主销释放位置。

    Cover and latching mechanism for rail car loading hatch
    26.
    发明授权
    Cover and latching mechanism for rail car loading hatch 失效
    轨道车载舱盖和闭锁机构

    公开(公告)号：US4889056A

    公开(公告)日：1989-12-26

    申请号：US716577

    申请日：1985-03-27

    申请人： Thomas Stewart

    发明人： Thomas Stewart

    IPC分类号： B61D5/06 ,  B61D17/16

    CPC分类号： B61D5/08 ,  B61D17/16 ,  Y10S292/49 ,  Y10T292/202

    摘要： A generally circular cover for closing a hatch opening in a railroad car hopper is connected to a diametral support bar for limited pivotal movement to provide uniform gasket loading between the cover member and the hatch coaming. One end of the support bar is hinged to the hopper roof and the opposite end includes a cam surface and laterally projecting retaining pins for engagement with a latch member. The latch member has a somewhat channel shaped portion pivotally connected to a link which, in turn is also pivotally secured to the hopper roof. The link includes opposed trunnion portions which are engageable with the cam surface to forciby engage the support bar to hold the hatch cover closed. The latch member includes open ended slots which are engageable with the retaining pins in such a way that the latch member will not disengage from the support bar when the latch member is swung to the release position if fluid pressure within the car hopper is sufficient to force the cover toward an open position.

    摘要翻译： 用于封闭铁路车料斗中的舱口开口的大致圆形的盖连接到径向支撑杆，用于有限的枢转运动，以在盖构件和舱口围板之间提供均匀的垫圈装载。 支撑杆的一端铰接到料斗顶部，并且相对端包括凸轮表面和用于与闩锁构件接合的侧向突出的保持销。 闩锁构件具有枢转地连接到连杆的稍微通道形状的部分，该连杆又可枢转地固定到料斗顶部。 连杆包括可与凸轮表面接合的相对的耳轴部分，以便与支撑杆接合以将舱口盖关闭。 闩锁构件包括敞开的狭槽，其可以与保持销接合，使得当闩锁构件摆动到释放位置时，闩锁构件将不会从支撑杆脱离，如果汽缸内的流体压力足以迫使 盖子朝向开放位置。

    Method for removal of polymerization inhibitor
    27.
    发明授权
    Method for removal of polymerization inhibitor 失效
    去除阻聚剂的方法

    公开(公告)号：US4144137A

    公开(公告)日：1979-03-13

    申请号：US817777

    申请日：1977-07-21

    申请人： Thomas Stewart

    发明人： Thomas Stewart

    IPC分类号： C07C51/44 ,  C07C57/07 ,  B01D3/34

    CPC分类号： C07C51/44

    摘要： The removal of the polymerization inhibitor p benzoquinone from acrylic and methacrylic monomers is effectuated by adding to the inhibited monomers either prior to distillation or during distillation in a distillation zone, sufficient amounts of a monoalkyl substituted hydroquinone, a 2,5-dialkyl substituted hydroquinone or a dihydroxynaphthalene to prevent the benzoquinone from co-distilling with the monomer or to convert the benzoquinone in a distillation zone to a non-volatile compound during the distillation so that the converted benzoquinone returns to the feed flask.

    摘要翻译： 从丙烯酸和甲基丙烯酸单体中除去聚合抑制剂对苯醌通过在蒸馏之前或在蒸馏区中蒸馏期间加入抑制的单体来实现，足量的单烷基取代的氢醌，2,5-二烷基取代的氢醌或 二羟基萘，以防止苯醌与单体共蒸馏或在蒸馏过程中将蒸馏区中的苯醌转化为不挥发性化合物，使得转化的苯醌返回进料烧瓶。