Magnetic-tape cassette apparatus comprising a deck for magnetic-tape
cassettes reversing mechanism
    41.
    发明授权
    Magnetic-tape cassette apparatus comprising a deck for magnetic-tape cassettes reversing mechanism 失效
    磁带盒装置,包括用于磁带盒反转机构的甲板

    公开(公告)号:US5346156A

    公开(公告)日:1994-09-13

    申请号:US941465

    申请日:1992-09-08

    IPC分类号: G11B15/29 G11B15/44 G11B15/26

    CPC分类号: G11B15/442 G11B15/29

    摘要: A magnetic-tape cassette apparatus having a deck for magnetic-tape cassettes with a reel drive mechanism for transporting a tape with a first and an opposite, second tape transport direction. The change-over from the first tape transport direction to the opposite second tape transport direction is affected by a switching mechanism which switches the reel-drive mechanism between a play mode in the forward direction and a play mode in the reverse direction. The switching mechanism includes a switching lever moveable from a first position for the first playing direction to a second position for the opposite second play direction. The switching lever is moved by a pair of switching wheels, whose teeth are engageable with associated teeth of adjacent flywheels for changing over the switching lever from the predetermined position for one playing direction to the predetermined position for the opposite other playing direction by actuating elements provided on the switching wheels.

    摘要翻译: 一种磁带盒装置,具有用于磁带盒的磁带盒,带有用于传输具有第一和相对的第二磁带传输方向的磁带的磁带盘驱动机构。 从第一磁带传输方向到相反的第二磁带传输方向的切换受切换机构的影响,该切换机构在前进方向的播放模式和反向播放模式之间切换卷轴驱动机构。 切换机构包括可从第一播放方向的第一位置移动到用于相反的第二播放方向的第二位置的切换杆。 切换杆由一对切换轮移动,所述切换轮的齿可与相邻飞轮的相关齿接合,用于通过所提供的致动元件将切换杆从用于一个打开方向的预定位置切换到用于相对于另一个播放方向的预定位置 在切换轮上。

    Electrooptical display element
    43.
    发明授权
    Electrooptical display element 失效
    电光显示元件

    公开(公告)号:US5288427A

    公开(公告)日:1994-02-22

    申请号:US815832

    申请日:1991-12-24

    IPC分类号: C09K19/30 C09K19/34 C09K19/52

    摘要: Compounds of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A--O--R.sup.2in whichR.sup.1 and R.sup.2, independently of one another, are each alkyl having 1 to 9 C atoms, in which, in addition, one or two CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, where two O atoms are not linked directly to one anther, or one of the two groups R.sup.1 and R.sup.2 is alternatively H,Z.sup.1 is --CH.sub.2 --O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond,A.sup.1 is trans-1,4-cyclohexylene in which, in addition one or two nonadjacent CH.sub.2 groups may be replaced by O and/or S, or 1,4-cyclohexenylene, andA is unsubstituted or fluorine-substituted 1,4-phenylene, can be used as components of liquid-crystalline dielectrics containing at least three liquid-crystalline compounds for shortening the switch-on time T.sub.on of electrooptical display elements based on a TN cell on switching the voltage from a first voltage below or approximately at the threshold voltage to a second voltage on the increase of the electrooptical characteristic line.

    摘要翻译: 其中R 1和R 2彼此独立地为具有1至9个C原子的烷基的式I R1-A1-Z1-AO-R2的化合物,其中另外一个或两个CH 2基团可以被 -O-,-CO-,-O-CO-,-CO-O-和/或-CH = CH-,其中两个O原子不直接连接到一个花药,或者两个基团R1和R2之一是 或者H,Z 1是-CH 2 -O - , - OCH 2 - , - CH 2 CH 2 - 或单键,A 1是反式-1,4-亚环己基,其中一个或两个不相邻的CH2基团可被O和/ 或S或1,4-亚环己烯基,A为未取代的或氟取代的1,4-亚苯基,可用作含有至少三种液晶化合物的液晶电介质的组分,以缩短接通时间Ton 基于TN单元的电光显示元件在电压特性线的增加时将电压从低于或接近阈值电压的第一电压切换到第二电压。

    Pressure bar for a belt grinding machine
    46.
    发明授权
    Pressure bar for a belt grinding machine 失效
    皮带磨床的压力棒

    公开(公告)号:US5016400A

    公开(公告)日:1991-05-21

    申请号:US500787

    申请日:1990-03-28

    申请人: Georg Weber

    发明人: Georg Weber

    IPC分类号: B24B21/08

    CPC分类号: B24B21/08

    摘要: A pressure for a belt grinding machine includes an elongated carrier with a base plate facing the grinding belt and having a plurality of bores arranged in a matrix, a plurality bolt shaped pressure members supported in the bores for free axial movement and which are adapted to engage the grinding belt with their free ends and which with their other ends are urged toward the grinding belt by a hose inflatable by a pressure fluid. The hose is surrounded by a plurality of frame shaped pressure shoes arranged next to one another in the longitudinal direction of the carrier, each of which pressure shoes is adjustable vertically relative to the base plate by a positioning device. The pressure shoes each have a frame side facing the base plate provided with bores registering with the base plate bores for receiving the pressure members, and inside of each pressure shoe and between the hose and the adjacent ends of the pressure members is a flexible pressure distribution element having a higher stiffness than that of the hose material.

    摘要翻译: 皮带磨床的压力包括细长的载体,其具有面向研磨带的底板,并且具有以矩阵形式布置的多个孔,支撑在孔中的多个螺栓形状的压力构件用于自由轴向移动并且适于接合 具有其自由端的研磨带和其另一端通过可由压力流体充气的软管推向研磨带。 软管由多个在承载件的纵向方向上彼此相邻设置的框架状压力靴围绕,每个压力靴通过定位装置相对于基板垂直地调节。 压力靴各自具有面向基板的框架侧,底板设置有与基板孔对准的孔,用于接收压力构件,并且每个压力靴内部和软管与压力构件的相邻端之间的柔性压力分布 具有比软管材料更高刚度的元件。

    2,3-difluorophenol derivatives
    47.
    发明授权
    2,3-difluorophenol derivatives 失效
    2,3-二氟苯酚衍生物

    公开(公告)号:US4897216A

    公开(公告)日:1990-01-30

    申请号:US321046

    申请日:1989-03-09

    CPC分类号: C09K19/2007 C09K19/3068

    摘要: 2,3-Difluorophenol derivatives of the formula ##STR1## wherein R.sup.1 and R.sup.2, in each case independently of one another, are an alkyl group having 1 to 15 C atoms in which, in addition, one or two nonadjacent CH.sub.2 groups may be replaced by --O--, --CO--, --CH.dbd.CH-- and/or --C.tbd.C--;A is 1,4-phenylene which is unsubstituted or substituted by one or two fluorines, or is trans-1,4-cyclohexylene or a single bond; andL.sup.1 and L.sup.2, in each case independently of one another, are H or F,are suitable as components of liquid-crystalline media.

    摘要翻译: 其中R 1和R 2在每种情况下彼此独立地是具有1至15个C原子的烷基,其中另外还可以被一个或两个不相邻的CH 2基团所取代的2,3-二氟苯酚衍生物 由-O - , - CO - , - CH = CH-和/或-C A是未取代的或被一个或两个氟取代的1,4-亚苯基,或是反式-1,4-亚环己基或单键; 并且L1和L2在每种情况下彼此独立地是H或F,适合作为液晶介质的组分。

    Fluorine-containing pyrimidine derivatives
    48.
    发明授权
    Fluorine-containing pyrimidine derivatives 失效
    含氟嘧啶衍生物

    公开(公告)号:US4812258A

    公开(公告)日:1989-03-14

    申请号:US35820

    申请日:1987-04-08

    摘要: Liquid crystalline fluorine-containing pyrimidine compounds have the formula I ##STR1## wherein R.sup.1 and R.sup.2 are H, R, OR or OCOR, and one of them can also be CN or F, or, if A is a covalent bond, also one or both of R.sup.1 and R.sup.2 can be 4-R.sup.4 -phenyl or 4-R-cyclohexyl, wherein R.sup.4 is R, OR, cyano, f or OCOR; wherein R is an alkyl group of 1 to 12 C atoms; R.sup.3 is F or, if one of the radicals R.sup.1 or R.sup.2 is F or 4-fluorophenyl, also H; Z is 1,3-pyrimidin-2,5-diyl; and A is 1,4-phenylene, 1,4-cyclohexylene or a covalent bond.Fluorine-containing pyrimidine compounds are useful components of liquid crystal dielectrics for electro-optical display devices.

    摘要翻译: 液晶含氟嘧啶化合物具有式I的化合物,其中R 1和R 2是H,R,OR或OCOR,它们之一也可以是CN或F,或者如果A是共价键,也可以是一个或 R 1和R 2可以是4-R 4 - 苯基或4-R-环己基,其中R 4是R,OR,氰基,F或OCOR; 其中R是1至12个C原子的烷基; R 3为F,或者如果基团R 1或R 2中的一个为F或4-氟苯基,则为H; Z是1,3-嘧啶-2,5-二基; A是1,4-亚苯基,1,4-亚环己基或共价键。 含氟嘧啶化合物是用于电光显示装置的液晶电介质的有用组分。

    Liquid crystal compounds
    49.
    发明授权
    Liquid crystal compounds 失效
    液晶化合物

    公开(公告)号:US4704227A

    公开(公告)日:1987-11-03

    申请号:US702281

    申请日:1985-02-15

    摘要: Compounds of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 IwhereinR.sup.1 and R.sup.2 are each H, an alkyl, alkoxy, alkanoyl, alkanoyloxy or alkoxycarbonyl group with in each case 1-10 C atoms, F, Cl, Br, CN or R.sup.3 --A.sup.3 --Z.sup.2 --,A.sup.1 is --A--, --A.sup.4 --A--or --A--A.sup.4 --,A is a 1,3-dioxane-2,5-diyl or a 1,3-dithiane-2,5-diyl group,A.sup.2, A.sup.3 are each a 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl,and A.sup.4 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl or 1,4-bicyclo(2,2,2)octylene group, or a 1,4-phenylene, pyrimidine-2,5-diyl or pyridazine-3,6-diyl group which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH.sub.3 groups and/or CN groups,Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O or a single bond andR.sup.3 is H, an alkyl, alkoxy, alkanoyl, alkanoyloxy or alkoxycarbonyl group with in each case 1-10 C atoms, F, Cl, Br or CN, with the proviso that(a) at least one group A.sup.2, A.sup.3 and/or A.sup.4 contains lateral substituents,(b) 1,3-dioxane-2,5-diyl and 1,3-dithiane-2,5-diyl groups are not substituted by alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl, F, Cl, Br, CN or R.sup.3 --A.sup.3 --Z.sup.2 in the 2-position and piperidine-1,4-diyl groups are not substituted by these radicals in the 1-position,(c) Z.sup.1 is not --CH.sub.2 CH.sub.2 --if A.sup.1 is --A--and(d) Z.sup.1 is not --CO--O--if A.sup.1 is --A--A.sup.4 --and --A.sup.2 --R.sup.2 is 3-chloro-4-cyanophenyl and(e) all lateral substituents on pyrimidine-2,5-diyl and pyridazine-3,6-diyl groups are attached to C-atoms,can be used as components of liquid crystal phases.

    摘要翻译: 式ⅠR1-A1-Z1-A2-R2Ⅰ化合物,其中R1和R2各自为H,烷基,烷氧基,烷酰基,烷酰氧基或烷氧基羰基,在每种情况下为1-10个C原子,F,Cl,Br, CN或R3-A3-Z2-,A1为-A-,-A4-A-或-A-A4-,A为1,3-二恶烷-2,5-二基或1,3-二噻烷-2 ,5-二基,A2,A3分别为1,4-亚环己基,1,3-二恶烷-2,5-二基和A4 1,3-二噻烷-2,5-二基,哌啶-1,4-二基, 二(2,4-二)亚辛基或1,4-亚苯基,嘧啶-2,5-二基或哒嗪-3,6-二基,其未被取代或被1或2个取代 F和/或Cl原子和/或CH 3基团和/或CN基团,Z 1和Z 2各自为-CO-O-,-O-CO - , - CH 2 CH 2 - , - OCH 2 - , - CH 2 O或单键, 是烷基,烷氧基,烷酰基,烷酰氧基或烷氧基羰基,在每种情况下为1-10个C原子,F,Cl,Br或CN,条件是(a)至少一个基团A2,A3和/或A4 含有侧向取代基,(b)1,3-二恶烷-2,5-二基和1,3-二噻烷-2,5-二基不被烷氧基,烷氧基取代 2位的烷酰氧基,烷氧基羰基,F,Cl,Br,CN或R3-A3-Z2在1-位上不被这些基团取代,(c)Z1是 如果A1是-A,则不是-CH2CH2 - 如果A1是-A-A4,而(d)Z1不是-CO-O-,-A2-R2是3-氯-4-氰基苯基,(e)所有的侧取代基 嘧啶-2,5-二基和哒嗪-3,6-二基与C原子连接,可用作液晶相的成分。