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    • 4. 发明授权
    • Conductive liquid compositions and electrical circuit protection devices
comprising conductive liquid compositions
    • 导电液体组合物和包含导电液体组合物的电路保护装置
    • US5581192A
    • 1996-12-03
    • US350299
    • 1994-12-06
    • John J. SheaJames D. B. SmithKarl F. Schoch, Jr.
    • John J. SheaJames D. B. SmithKarl F. Schoch, Jr.
    • H01H29/00H01H29/06H01H33/16H01H71/24G01R31/00
    • H01H29/06H01H29/004H01H33/162H01H71/24
    • Novel conductive liquid compositions which have low resistivity when carrying an applied steady-state current (I.sub.Steady-State) but exhibit sharp increases in resistivity when subject to an applied fault current (I.sub.Fault). When used in circuit protection devices, the novel conductive liquid compositions having low resistivity are contained within an elongated flexible tube sealed by electrodes electrically connected to a load of an electrical circuit. The conductive liquid compositions carry an applied normal current under steady-state conditions. The flexible tube is deformed by radial contraction transverse to the direction of current flow and axial expansion, when an excessive current of fault magnitude is sensed by an actuator electrically connected to the electrodes and mechanically connected to the flexible tube to apply a deformation force on the tube, thereby causing the current path of the conductive liquid compositions to have high resistivity in order to limit the let through current to a safe value (I.sub.Limited). When the excessive current is removed, the deformation is correspondingly removed and the conductive liquid composition automatically reverts back to its original low resistivity state. The invention has specific applications as automatically resettable fuses or current limiters.
    • 新型导电液体组合物在承载施加的稳态电流(ISteady-State)时具有低电阻率,但在受到施加的故障电流(IFault)时呈现电阻率的急剧增加。 当用于电路保护装置时,具有低电阻率的新型导电液体组合物被包含在由电连接到电路的负载的电极密封的细长柔性管中。 导电液体组合物在稳态条件下携带施加的正常电流。 柔性管通过横向于电流和轴向膨胀方向的径向收缩而变形,当故障幅度的过大电流被电连接到电极的致动器感测并机械地连接到柔性管以在其上施加变形力时 从而导致导电液体组合物的电流路径具有高电阻率,以便将通过电流限制到安全值(ILimited)。 当去除过大的电流时,相应地去除变形,并且导电液体组合物自动地回复到其原始的低电阻率状态。 本发明具有可自动复位的保险丝或电流限制器的具体应用。
    • 7. 发明授权
    • Electrical circuit protection devices comprising conductive liquid
compositions
    • 包括导电液体组合物的电路保护装置
    • US5471185A
    • 1995-11-28
    • US350291
    • 1994-12-06
    • John J. SheaJames D. B. SmithKarl F. Schoch, Jr.
    • John J. SheaJames D. B. SmithKarl F. Schoch, Jr.
    • H01H29/00H01H29/06H01H71/24
    • H01H29/06H01H29/004H01H71/24
    • The invention provides an electrical circuit protection device using a conductive liquid contained in a flexible tube contacted and sealed at each end by an annular metal electrode capped by a flexible membrane. The flexible tube is further sealed inside a solid insulating tube which contains a ferromagnetic liquid. The ferromagnetic liquid surrounds the flexible tube and remains in intimate contact with the outside of the flexible tube and is connected to a load sensing element which generates a magnetic field in the ferromagnetic fluid in response to excessive currents applied in the current path through the conductive liquid between the electrodes. This assembly is contained inside a tubular resistor. Under normal current conditions, a current flows through the conductive liquid which has relatively low resistivity. Upon a fault condition, a self generated magnetic field from the fault current causes the ferromagnetic fluid to rapidly constrict and pinch off current flow in the conductive liquid by constricting the current path in the liquid through deformation of the flexible capsule, i.e., by radial contraction and axial expansion. The current is then preferably commutated to the cylindrical resistor to limit the let through current to a safe value. Once the fault is limited, the magnetic field is dissipated and the flexible membranes force the conductive liquid and ferromagnetic fluid back to its their original position and the conductive liquid accordingly automatically reverts back to low resistivity for normal current conduction.
    • 本发明提供了一种电路保护装置,其使用包含在柔性管中的导电液体,每个端部由柔性膜覆盖的环形金属电极接触和密封。 柔性管进一步密封在含有铁磁性液体的固体绝缘管内。 铁磁液体围绕柔性管并且保持与柔性管的外部紧密接触并且连接到负载感测元件,该负载感测元件响应于在电流路径中施加的过大电流而在铁磁流体中产生磁场,该电流通过导电液体 在电极之间。 该组件包含在管状电阻器内。 在正常电流条件下,电流流过具有较低电阻率的导电液体。 在故障状态下,来自故障电流的自产生的磁场使得铁磁性流体通过使柔性胶囊的变形(即通过径向收缩)收缩液体中的电流路径,迅速收缩并夹紧导电液体中的电流 和轴向膨胀。 然后,电流优选地换向圆柱形电阻器,以将通过电流限制到安全值。 一旦故障受到限制,磁场就会消散,柔性膜会迫使导电液体和铁磁性流体回到其原始位置,导电液体会自动回复到低电阻,以保持正常的电流传导。
    • 10. 发明授权
    • Thermal interface material for electronic assemblies
    • 用于电子组件的热界面材料
    • US07718256B1
    • 2010-05-18
    • US11397799
    • 2006-04-05
    • Paul P. FrankKenneth C. RadfordKarl F. Schoch, Jr.Eileen M. WojtalPhilip A. Panackal
    • Paul P. FrankKenneth C. RadfordKarl F. Schoch, Jr.Eileen M. WojtalPhilip A. Panackal
    • B32B7/12
    • C09J163/00Y10T428/28Y10T428/2848
    • Thermal interface materials are essential for proper operation of electronic assemblies. They are used between surface mount components and printed wiring boards and between printed wiring boards and metal heat sinks. Their function is to bond the components together and allow good heat transfer between the parts being bonded. The approach disclosed in this invention is a fully-cured, flexible, filled elastomer that is coated on both sides with a partially cured, filled adhesive, which can be conveniently made by a low cost tape casting process. This unique approach offers a combination of good adhesion to both bonding surfaces, good heat transfer, compliance to accommodate mismatched coefficient of thermal expansion, rework capability, control of flow of the adhesive during cure, and easy handling of uncured material.
    • 热界面材料对于电子组件的正确操作至关重要。 它们用于表面贴装元件和印刷电路板之间以及印刷电路板和金属散热片之间。 它们的功能是将组件粘合在一起,并允许粘合部件之间的良好的热传递。 在本发明中公开的方法是一种完全固化的,柔性的,填充的弹性体,其在两侧涂覆有部分固化的填充的粘合剂,其可以通过低成本的带式浇铸工艺方便地制成。 这种独特的方法提供了对粘合表面的良好粘附性,良好的热传递,适应性,适应不匹配的热膨胀系数,返工能力,粘合剂在固化过程中的流动控制以及容易处理未固化的材料的组合。