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    Display arrangement for symbols
    1.
    发明授权
    Display arrangement for symbols 失效
    显示器符号符号

    公开(公告)号：US3581301A

    公开(公告)日：1971-05-25

    申请号：US3581301D

    申请日：1967-10-24

    申请人： CONTRAVES AG

    发明人： STUTZ THEO ,  MUELLER WERNER

    IPC分类号： G04G9/12 ,  G08B5/28 ,  G09F9/37 ,  G09F13/04 ,  G09F9/30

    CPC分类号： G08B5/28 ,  G04G9/128 ,  G09F9/375 ,  G09F2013/0472

    摘要： A display arrangement for displaying any desired symbol in an arbitrary manner in any desired sequence. The display is in the form of a grid pattern in which the grid areas confined by the lines and columns of the grid are either of one visual surface or another visually contrasting surface. The surfaces are flipped from one to the other through the application of a magnetic actuating device. The actuating device supports the visually contrasting surfaces and includes two permanent magnetic discs mounted in a plane perpendicular to the axis of movement or rotation about which the device moves in flipping from one display surface to the other. The permanent magnets operate in conjunction with an electromagnet which generates a field directed through an airgap. When the direction of the magnetic field is in one sense, one of the two permanent magnetic discs is attracted into the airgap while the other is repelled. When the direction of the magnetic field is reversed, the action upon the permanent magnetic discs is correspondingly reversed and the actuating device is moved so as to display the appropriate visual surface. By energizing the electromagnet with current in the proper direction, a particular area within the grid pattern may be made of one or the other contrasting surface and as a result any desired symbol may be displayed.

    Arrangement for measuring angular rotation using two moiree patterns
    2.
    发明授权
    Arrangement for measuring angular rotation using two moiree patterns 失效
    使用两个模式来测量角度旋转的安排

    公开(公告)号：US3553469A

    公开(公告)日：1971-01-05

    申请号：US3553469D

    申请日：1968-02-23

    申请人： CONTRAVES AG

    发明人： STUTZ THEO ,  GLAUSER PETER

    IPC分类号： G01D5/36 ,  G01D5/38 ,  H01J39/12 ,  G01B11/26

    CPC分类号： G01D5/38

    摘要： For measuring the angular rotation between a first and second member a disc having a ringlike grating is mounted on each member. The gratings are identical, but the centers are displaced from each other. Light shining through the superimposed gratings generates Moiree patterns which are received by two groups of photocells situated diametrically opposite one another. Each group generates polyphase currents whose magnitude varies in synchronism with the motion between the gratings. The two groups of currents are evaluated to yield an angle.