Single or multi-stage switching field for telephone exchanges
    1.
    发明授权
    Single or multi-stage switching field for telephone exchanges 失效
    电话交换机的单级或多级交换领域

    公开(公告)号:US4670901A

    公开(公告)日:1987-06-02

    申请号:US818990

    申请日:1986-01-10

    IPC分类号: H04Q3/68 H04Q3/52

    CPC分类号: H04Q3/68

    摘要: A multi-stage switching-field formed with switching matrices containing thyristors for stored program controlled switching devices, established by reversal at the last stage, without the use of transformers or other reactive elements therein (e.g. capacitance), in the last stage a holding circuit remains invariable upon switching on, furthermore allocating and switching circuits are ordered to the coupling paths instead of the stages. Circuit arrangements of the switching-field provide the possibility for attenuation control too, and do not require voltages of opposite polarity, while at the same time provide an interface requiring uniform, short operations towards the stored program control device. The switching matrices are switched on at minimal power-level, thus the switching of each further coupling path or connection does not increase the noise level of the already existing connections. The switching-field provides effective protection against unwarranted disconnections caused by noise arriving from the lines, and ensures through impedance matching to attain the optimal ratios of the insertion loss, dynamic range of the connections, and cross-talk attenuation between the different connections. The circuits developed for the switching-field according to the invention are suitable also for production with hydrid or monolithic technology.

    摘要翻译: 一种多级开关场,形成有包含用于存储程序控制的开关装置的晶闸管的开关矩阵,其通过在最后阶段反转而不在其中使用变压器或其它无功元件建立(例如,电容),在最后阶段中保持电路 在接通时保持不变,此外分配和切换电路被排序到耦合路径而不是阶段。 开关电路的电路布置也提供衰减控制的可能性,并且不需要相反极性的电压,同时提供对存储的程序控制装置需要均匀的短操作的接口。 开关矩阵以最小功率电平接通,因此每个另外的耦合路径或连接的切换不会增加现有连接的噪声水平。 开关场提供有效保护,防止由线路噪声引起的无理断开,并通过阻抗匹配确保插入损耗,连接的动态范围和不同连接之间的串扰衰减的最佳比例。 根据本发明开发的用于开关场的电路也适用于采用氢化或单片技术的生产。

    Chemical process for the preparation of pharmaceutically active compounds
    2.
    发明授权
    Chemical process for the preparation of pharmaceutically active compounds 失效
    用于制备药物活性化合物的化学方法

    公开(公告)号:US5023337A

    公开(公告)日:1991-06-11

    申请号:US469749

    申请日:1990-01-19

    IPC分类号: C07D235/32

    CPC分类号: C07D235/32

    摘要: The present invention is directed to the preparation of benzimidazole derivatives of the formula (I), ##STR1## wherein A=stands for S, SO or SO.sub.2,R.sup.1 =stands for C.sub.1-4 alkyl group,R.sup.2 =stands for C.sub.1-4 alkyl, C.sub.3-7 cycloalkyl or C.sub.6-10 aryl or aralkyl,comprising reacting a sulphochloride of the formula (II) ##STR2## with an alkyl aluminum compound of the formula (III).R.sub.n.sup.2 AlClhd (3-n) (III)The reaction is performed in one step.

    摘要翻译: 本发明涉及制备式(I)的苯并咪唑衍生物,其中A = S,SO或SO 2,R 1 = C 1-4烷基,R 2代表C 1 1-4烷基,C 3-7环烷基或C 6-10芳基或芳烷基,其包括使式(II)的二氯化亚氨基与式(III)的烷基铝化合物反应。 Rn2AlClhd(3-n)(III)反应在一个步骤中进行。

    Process for the preparation of imidazolones
    4.
    发明授权
    Process for the preparation of imidazolones 有权
    咪唑啉酮的制备方法

    公开(公告)号:US6162923A

    公开(公告)日:2000-12-19

    申请号:US463433

    申请日:2000-04-26

    IPC分类号: C07D235/02

    CPC分类号: C07D235/02

    摘要: The present invention relates to a process for the preparation of a compound of general formula (I), ##STR1## wherein R.sup.1 represents a hydrogen atom or an alkyl group of 1-6 carbon atoms, and their salts, wherein the compound of formula (II): ##STR2## is reacted with a compound of formula (III): ##STR3## wherein R represents an alkyl group of 1-4 carbon atoms and R.sup.1 is the same as defined above, by heating their neutral pH mixtures at the boiling temperature of the mixture, and the resulting compound of general formula (IV): ##STR4## wherein R and R.sup.1 are the same as defined above, is cyclized into the compound of general formula (I) by further elevating the temperature of the neutral mixture, and if desired, the compounds of general formula (I) are transformed into their salts, or the compounds of general formula (I) are liberated from their salts.

    摘要翻译: PCT No.PCT / HU98 / 00065 Sec。 371日期:2000年04月26日 102(e)日期2000年4月26日PCT提交1998年7月22日PCT公布。 出版物WO99 /​​ 05118 日期1999年2月4日本发明涉及制备通式(I)化合物的方法,其中R1表示氢原子或1-6个碳原子的烷基,及其盐,其中化合物 式(II):与式(III)化合物反应:其中R表示1-4个碳原子的烷基且R1与上述定义相同,通过在混合物的沸点温度下加热其中性pH混合物 ,并且通过进一步提高中性混合物的温度将所得到的通式(IV)化合物(其中R和R 1与上述定义相同)环化成通式(I)的化合物,如果需要,化合物 通式(I)的化合物转化为它们的盐,或者通式(I)的化合物从其盐中释放出来。