Epoxy resin
    2.
    发明授权
    Epoxy resin 失效
    环氧树脂

    公开(公告)号:US4916202A

    公开(公告)日:1990-04-10

    申请号:US98091

    申请日:1987-09-17

    IPC分类号: C07D303/36 C08G59/32

    CPC分类号: C07D303/36 C08G59/3227

    摘要: The present invention provides an epoxy resin of the formula ##STR1## where A is selected from the group consisting of --C(CH.sub.3).sub.2 --, --C(CF.sub.3).sub.2 --, --S--, --SO.sub.2 --, --CH.sub.2 --, --CO--, --O--, and --C.sub.3 H.sub.6 --, and each B.sub.1, B.sub.2, B.sub.3, and B.sub.4 is independently selected from the group consisting of --H, --F, --Cl, --Br, --I, --CH.sub.2 CH.dbd.CH.sub.2, --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, and --C.sub.4 H.sub.9.The present invention also provides a curable composition comprising an epoxy resin of the foregoing formula (I) and an effective curing amount of a hardener for an epoxy resin. The moisture sensitivity of the cured castings and/or composites based on the epoxy resins is lower than known epoxy resin castings and/or composites that have comparable thermal stability, modulus, strength, processability, and toughness.

    摘要翻译: 本发明提供下式的环氧树脂:其中A选自-C(CH 3)2 - , - C(CF 3)2 - , - S - , - SO 2 - ,-CH 2 - , - CO - , - O-和-C 3 H 6 - ,并且每个B 1,B 2,B 3和B 4独立地选自-H,-F,-Cl,-Br, I,-CH 2 CH = CH 2,-CH 3,-C 2 H 5,-C 3 H 7和-C 4 H 9。 本发明还提供一种包含上述式(I)的环氧树脂和环氧树脂固化剂的有效固化量的可固化组合物。 基于环氧树脂的固化的铸件和/或复合材料的湿度敏感性低于具有相当的热稳定性,模量,强度,加工性能和韧性的已知的环氧树脂铸件和/或复合材料。

    Leakage measuring apparatus for a gas-cooled, liquid-cooled,
dynamoelectric machine
    3.
    发明授权
    Leakage measuring apparatus for a gas-cooled, liquid-cooled, dynamoelectric machine 失效
    用于气冷式液冷式电动机的泄漏测量装置

    公开(公告)号:US4300066A

    公开(公告)日:1981-11-10

    申请号:US21528

    申请日:1979-03-19

    IPC分类号: G01M3/32 H02K9/24 H02K9/00

    摘要: A leakage measuring apparatus and method is herein provided for a gas-cooled, liquid-cooled dynamoelectric machine's cooling system. The apparatus comprises: a liquid coolant reservoir; an integrating vessel; a flow restriction means such as an orifice, orifice covered by a porous membrane, or a needle valve; a pressure relief valve which is hydraulically connected between the liquid coolant reservoir and the integrating vessel; and means for gaging the pressure within the integrating vessel, said pressure indicative of the amount of leakage within the cooling system. The effect obtained by the gaging of the pressure in the integrating vessel is: (1) the integration of the pressure surges resulting from the intermittent activation of the pressure relief valve; and (2) the amplification, for gaging purposes, of the pressure changes in the reservoir, these changes caused by the existence of leakage.

    摘要翻译: 本文提供了一种用于气冷式液冷式电动机冷却系统的泄漏测量装置和方法。 该装置包括:液体冷却剂储存器; 整合船 诸如孔口,由多孔膜覆盖的孔口或针阀的流动限制装置; 压力释放阀,液压连接在液体冷却剂储存器和整合容器之间; 以及用于测量整合容器内的压力的装置,所述压力表示冷却系统内的泄漏量。 通过整流容器中的压力测量获得的效果是:(1)由压力释放阀的间歇启动产生的压力波动的积分; 和(2)用于测量目的的放大压力变化的储层,这些变化是由渗漏的存在引起的。

    Process for the preparation of aromatic ether bismaleimides
    4.
    发明授权
    Process for the preparation of aromatic ether bismaleimides 失效
    芳香醚双马来酰亚胺的制备方法

    公开(公告)号:US4904801A

    公开(公告)日:1990-02-27

    申请号:US282186

    申请日:1988-12-08

    CPC分类号: C07D207/452 H05K1/0346

    摘要: The present invention provides a process for producing aromatic ether bismaleimides of the Formula (II) ##STR1## wherein A is a divalent mononuclear or polynuclear aromatic linking group. The process provides good yields and can be scaled up readily to commerical size runs.The present invention also provides compositions containing at least about 80 weight % of the bismaleimide of Formula (II) above.

    摘要翻译: 本发明提供了制备式(II)的芳族醚双马来酰亚胺的方法,其中A是二价单核或多核芳族连接基团。 该方法提供了良好的产率,并且可以容易地扩大到商业尺寸运行。 本发明还提供含有至少约80重量%上述式(II)双马来酰亚胺的组合物。

    DNA typing by mass spectrometry with polymorphic DNA repeat markers
    5.
    发明授权
    DNA typing by mass spectrometry with polymorphic DNA repeat markers 有权
    用多态性DNA重复标记的质谱进行DNA分型

    公开(公告)号:US6090558A

    公开(公告)日:2000-07-18

    申请号:US157177

    申请日:1998-09-18

    IPC分类号: C12Q1/68 C07H21/04 C12P19/34

    CPC分类号: C12Q1/6858 Y10T436/24

    摘要: The present invention is related to the fields of genetic mapping and genetic identity detection, including forensic identification and paternity testing. This invention is more specifically directed to the use of mass spectrometry to detect length variation in DNA nucleotide sequence repeats (including variants of common alleles), such as microsatellites and short tandem repeats, and to DNA sequences provided as primers for the analysis of DNA tandem nucleotide repeat polymorphisms at specific loci on specific chromosomes.

    摘要翻译: 本发明涉及遗传作图和遗传身份检测领域,包括法医鉴定和亲子鉴定。 本发明更具体地涉及使用质谱来检测DNA核苷酸序列重复序列(包括常见等位基因的变体)如微卫星和短串联重复序列的长度变异,以及作为用于分析DNA串联的引物提供的DNA序列 核苷酸重复多态性在特定染色体上的特定位点。

    Durable formaldehyde-free phenolic resins, and method of preparing such
resins
    6.
    发明授权
    Durable formaldehyde-free phenolic resins, and method of preparing such resins 失效
    耐久不含甲醛的酚醛树脂及其制备方法

    公开(公告)号:US5367043A

    公开(公告)日:1994-11-22

    申请号:US788791

    申请日:1991-11-06

    IPC分类号: C08G61/00 C12P7/22 C08G63/18

    CPC分类号: C12P7/22 C08G61/00

    摘要: A curable formaldehyde-free phenolic resin having formula (I): ##STR1## wherein a and b each represent an integer equal to or greater than 1, a+b multiplied by n is an integer of about 3 to 100; ##STR2## m is 0 or 1; and R is hydrogen, halogen, alkyl having about 1 to 12 carbon atoms, aryl having about 6 to 12 carbon atoms, allyl having 3 or 4 carbon atoms, aralkyl having about 7 to 13 carbon atoms, alkaryl having about 7 to 13 carbon atoms, alkoxy having about 1 to 4 carbon atoms, aryloxy having about 6 to 12 carbon atoms, or ##STR3## and methods for preparing such resin are described.

    摘要翻译: 具有式(I)的可固化无甲醛酚醛树脂:[(A)a(B)b] n(I)< IMAGE>和B是< IMAGE>或< IMAGE>其中a和b各自表示 等于或大于1的整数,a + b乘以n为约3至100的整数; R1是氢或甲基,其中m是0或1; 并且R为氢,卤素,具有约1至12个碳原子的烷基,具有约6至12个碳原子的芳基,具有3或4个碳原子的烯丙基,具有约7至13个碳原子的芳烷基,具有约7至13个碳原子的烷芳基 ,具有约1至4个碳原子的烷氧基,具有约6至12个碳原子的芳氧基,或者“IMAGE”以及制备这种树脂的方法。

    Biased securement system for end winding conductor
    7.
    发明授权
    Biased securement system for end winding conductor 失效
    用于端部绕组导体的偏置固定系统

    公开(公告)号:US4942326A

    公开(公告)日:1990-07-17

    申请号:US340196

    申请日:1989-04-19

    IPC分类号: H02K3/50

    CPC分类号: H02K3/505 Y10S174/20

    摘要: A biased securement system for end winding conductors of a turbine generator stator has a support ring and a biased wedge system that compresses the end windings in both a radial and circumferential direction. The biased wedge system includes a pair of spacer blocks with confronting angular surfaces and a triangular shaped wedge that is biased towards the support ring by use of a belleville spring washer.

    Process for the preparation of aromatic ether bismaleimides
    9.
    发明授权
    Process for the preparation of aromatic ether bismaleimides 失效
    芳香醚双马来酰亚胺的制备方法

    公开(公告)号:US4855450A

    公开(公告)日:1989-08-08

    申请号:US136900

    申请日:1987-12-22

    CPC分类号: C07D207/452 H05K1/0346

    摘要: The present invention provides a process for producing aromatic ether bismaleimides of the Formula (II) ##STR1## wherein A is a divalent mononuclear or polynuclear aromatic linking group. The process provides good yields and can be scaled up readily to commercial size runs.The present invention also provides compositions containing at least about 80 weight % of the bismaleimide of Formula (II) above.

    摘要翻译: 本发明提供了制备式(II)的芳族醚双马来酰亚胺的方法,其中A是二价单核或多核芳族连接基团。 该方法提供良好的产率,并且可以容易地扩大到商业尺寸运行。 本发明还提供含有至少约80重量%上述式(II)双马来酰亚胺的组合物。

    Bi-directional axial flow blower for pump-storage hydrogenerators
    10.
    发明授权
    Bi-directional axial flow blower for pump-storage hydrogenerators 失效
    泵存储水力发电机双向轴流鼓风机

    公开(公告)号:US4219746A

    公开(公告)日:1980-08-26

    申请号:US941994

    申请日:1978-09-13

    IPC分类号: H02K9/18 H02K1/32

    CPC分类号: H02K9/12

    摘要: Axial flow blowers for cooling the rotatable field winding on synchronous dynamoelectric machines. An axial flow blower is provided on each axial end of the dynamoelectric machine. Each blower includes an inboard and an outboard section. Each section is capable of forcing a gas coolant through interpolar spaces which separate the poles on synchronous motors and generators. A flow guide is arranged in each interpolar space to direct the gas coolant against the adjacent field winding. One inboard section causes axial flow of the gas coolant through the interpolar spaces when the shaft of the dynamoelectric machine is rotated in a first direction and the other inboard section causes axial flow of the gas coolant in the opposite direction when the shaft is rotated in the second direction. The inboard sections are so designed that when they are rotating in their non-blowing direction of rotation, they extract minimum total pressure from the axially-propelled gas coolant forced towards them by the other inboard section and both outboard sections. The outboard sections provide axial flow of gas coolant through the interpolar spaces during both rotational directions of the shaft. Changing rotational direction in applications such as pump storage hydrogenerators requires such bi-directional axial flow blowers.

    摘要翻译: 用于冷却同步电机的可旋转励磁绕组的轴流式鼓风机。 在电动机的每个轴向端部设置轴流鼓风机。 每个鼓风机包括内侧和外侧部分。 每个部分都能够通过在同步电动机和发电机上分离极点的​​极间空间来迫使气体冷却剂。 在每个极间空间中布置有流动引导件,以引导气体冷却剂抵靠相邻的励磁绕组。 当电动机的轴沿第一方向旋转时,一个内侧部分导致气体冷却剂的轴向流动通过间极空间,而当轴旋转时,另一个内侧部分导致气体冷却剂在相反方向上的轴向流动 第二个方向 内侧部分被设计成当它们以非吹风方向旋转时,它们从另一个内侧部分和两个外侧部分向轴向推进的气体冷却剂提取最小总压力。 外侧部分在轴的两个旋转方向提供气体冷却剂通过间极空间的轴向流动。 在诸如泵存储水力发电机的应用中改变旋转方向需要这种双向轴流式鼓风机。