Liquid crystal display with particular relationship of the capacitances
    2.
    发明授权
    Liquid crystal display with particular relationship of the capacitances 失效
    具有电容特定关系的液晶显示器

    公开(公告)号:US4838653A

    公开(公告)日:1989-06-13

    申请号:US197771

    申请日:1988-03-18

    摘要: A display comprises an array of a plurality of liquid crystal elements electrically connected in series. The element with the lowest capacitance when energized comprises a liquid crystal material having a positive dielectric anisotropy so that it has a higher capacitance when energized than when non-energized. A second of the elements has a capacitance when non-energized lower than the capacitance of the first element when it is energized. The display can be used for detecting a voltage or an electric field.

    摘要翻译: PCT No.PCT / US87 / 01756 Sec。 371日期:1988年3月18日 102(e)日期1988年3月18日PCT提交1986年7月22日PCT公布。 出版物WO88 / 00717 日期:1988年1月28日。显示器包括串联电连接的多个液晶元件阵列。 当通电时具有最低电容的元件包括具有正介电各向异性的液晶材料,使得其在通电时具有比未通电时更高的电容。 第二个元件在未通电时具有低于第一元件的电容通电时的电容。 显示器可用于检测电压或电场。

    Insulating multiple-conductor cables using coated insert means
    3.
    发明授权
    Insulating multiple-conductor cables using coated insert means 失效
    使用涂覆的插入方式绝缘多芯电缆

    公开(公告)号:US4589939A

    公开(公告)日:1986-05-20

    申请号:US702117

    申请日:1985-02-15

    IPC分类号: H02G15/08 H02G15/10 H01B13/22

    摘要: The conductors of multi-conductor, medium voltage, power cables, at locations where the cable insulation has been removed, are insulated by positioning between the conductors or cores, an insert, at least the surface of which comprises a first void-filling material capable of forming a substantially void-free interface with each conductor, placing a second void-filling material over the conductors and recovering a dimensionally recoverable polymeric sleeve over the resulting assembly. The method is particularly useful to provide insulation between conductors of a joint between two multi-conductor, medium voltage power cables.

    摘要翻译: 多导体,中压电源电缆的导体,在电缆绝缘层已经被去除的位置,通过在导体或芯之间的定位被绝缘,插入件至少其表面包括第一空隙填充材料,其能够 与每个导体形成基本上无空隙的界面,将第二空隙填充材料放置在导体上方,并在所得组件上回收尺寸可恢复的聚合物套管。 该方法特别有用于在两根多导体,中压电力电缆之间的接头的导体之间提供绝缘。

    Conductive polymer composition
    5.
    发明授权
    Conductive polymer composition 失效
    导电聚合物组成

    公开(公告)号:US5106538A

    公开(公告)日:1992-04-21

    申请号:US459722

    申请日:1990-01-11

    摘要: A composition which comprises a matrix polymer and, distributed therein, a particulate conductive filler. At least some of the filler particles are composed of a conductive polymer composition and/or the matrix comprises a sintered polymer. The matrix polymer and the filler particles and the method of distributing the particles are such that the particles maintain their identity in the matrix. For example, the particles are preferably highly cross-linked so that they have a hot modulus of at least 250 psi if the composition is prepared by melt extrusion or another process involving a high degree of shear; or a low-shear process such as sintering can be used. Preferably the matrix polymer is capable of coating the filler particles; for example, the matrix polymer and the filler polymer may be chemically similar. The invention is particularly useful for preparing compositions which have high resistivities, e.g. 1000 ohm.cm or more, and which can be prepared with a high degree of reproduceability. The compositions can exhibit PTC, ZTC or NTC behavior, depending on the nature of the conductive filler, and their resistivity is dependent on the electric field. The composition are particularly useful as resistive materials in sheet heaters and as stress-grading materials for high voltage apparatus.

    摘要翻译: PCT No.PCT / US88 / 02484第 371 1990年1月11日第 102(e)日期1990年1月11日PCT提交1988年7月21日PCT公布。 公开号WO89 / 00755 日本1989年1月26日。一种组合物,其包含基质聚合物并分布在其中的颗粒状导电填料。 至少一些填料颗粒由导电聚合物组合物和/或基质包含烧结聚合物组成。 基质聚合物和填料颗粒以及分散颗粒的方法使得颗粒在基质中保持它们的相同性。 例如,颗粒优选是高度交联的,使得如果组合物通过熔融挤出或涉及高剪切程度的另一种方法制备,它们的热模量至少为250psi; 或者可以使用诸如烧结的低剪切工艺。 优选地,基质聚合物能够涂覆填料颗粒; 例如,基质聚合物和填料聚合物可以化学相似。 本发明特别可用于制备具有高电阻率的组合物,例如, 1000欧姆·厘米或更高,并且可以以高度的可再现性制备。 组合物可以表现出PTC,ZTC或NTC的行为,这取决于导电填料的性质,其电阻率取决于电场。 该组合物特别用作片状加热器中的电阻材料以及用作高压装置的应力分级材料。

    Conductive polymer composition
    7.
    发明授权
    Conductive polymer composition 失效
    导电聚合物组合物

    公开(公告)号:US5106540A

    公开(公告)日:1992-04-21

    申请号:US75929

    申请日:1987-07-21

    CPC分类号: H01B1/24 H01C7/027

    摘要: A composition which comprises a matrix polymer and, distributed therein, a particulate conductive filler. At least some of the filler particles are composed of a conductive polymer composition and/or the matrix comprises a sintered polymer. The matrix polymer and the filler particles and the method of distributing the particles are such that the particles maintain their identity in the matrix. For example, the particles are preferably highly cross-linked so that they have a hot modulus of at least 250 psi if the composition is prepared by melt extrusion or another process involving a high degree of shear; or a low-shear process such as sintering can be used. Preferably the matrix polymer is capable of coating the filler particles; for example, the matrix polymer and the filler polymer may be chemically similar. The invention is particularly useful for preparing compositions which have high resistivities, eg. 1000 ohm.cm or more, and which can be prepared with a high degree of reproduceability. The compositions can exhibit PTC, ZTC or NTC behavior, depending on the nature of the conductive filler, and their resistivity is dependent on the electric field. The compositions are particularly useful as resistive materials in sheet heaters and as stress-grading materials for high voltage apparatus.

    摘要翻译: 一种组合物,其包含基质聚合物并在其中分布有颗粒状导电填料。 至少一些填料颗粒由导电聚合物组合物和/或基质包含烧结聚合物组成。 基质聚合物和填料颗粒以及分散颗粒的方法使得颗粒在基质中保持它们的相同性。 例如,颗粒优选是高度交联的,使得如果组合物通过熔融挤出或涉及高剪切程度的另一种方法制备,它们的热模量至少为250psi; 或者可以使用诸如烧结的低剪切工艺。 优选地,基质聚合物能够涂覆填料颗粒; 例如,基质聚合物和填料聚合物可以化学相似。 本发明特别可用于制备具有高电阻率的组合物,例如, 1000欧姆·厘米或更高,并且可以以高度的可再现性制备。 组合物可以表现出PTC,ZTC或NTC的行为,这取决于导电填料的性质,其电阻率取决于电场。 该组合物特别可用作片状加热器中的电阻材料和用作高压设备的应力分级材料。

    Liquid crystal electrical fault indicators
    8.
    发明授权
    Liquid crystal electrical fault indicators 失效
    液晶电气故障指示灯

    公开(公告)号:US5066104A

    公开(公告)日:1991-11-19

    申请号:US173407

    申请日:1988-03-25

    IPC分类号: G02F1/13 G09G3/18

    CPC分类号: G02F1/1313

    摘要: An electrical apparatus having a liquid crystal fault indicator, comprising: an electrical component subject to electrical fault; a smectic liquid crystal display having an indicating element having a first and a second visual state, said indicating element being capable of transitioning from the first to the second visual state upon the application of an electric field sufficient to realign the smectic liquid crystal material contained therein and remaining in the second visual state after the removal of the electric field and further being capable of transitioning from the second to the first visual state upon heating to at least a delatching temperature Td sufficient to destroy the electric field induced alignment of the smectic liquid crystals; and fault signal means for providing, upon the occurrence of a fault, a prescribed input sufficient to cause said indicating element to transition from a visual state indicative of an unfaulted condition to a visual state indicative of a faulted condition.

    摘要翻译: 一种具有液晶故障指示器的电气设备,包括:受电故障的电气部件; 具有具有第一和第二视觉状态的指示元件的近晶液晶显示器,所述指示元件能够在施加足以使其中包含的近晶液晶材料重新排列的电场时从第一视觉状态转变为第二视觉状态 并且在除去电场之后保持在第二视觉状态,并且在加热时还能够从第二视觉状态转换到至少达到足以破坏近晶晶体的电场诱导对准的剔除温度Td ; 以及故障信号装置,用于在出现故障时提供足以使所述指示元件从指示未故障状态的视觉状态转换到指示故障状态的视觉状态的规定输入。