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7 条记录 (耗时 0.016 秒)

    Method and device for determining the homogeneity of magnetic dispersions
    3.
    发明授权
    Method and device for determining the homogeneity of magnetic dispersions 失效
    用于确定磁性分散体的均匀性的方法和装置

    公开(公告)号：US4243059A

    公开(公告)日：1981-01-06

    申请号：US908446

    申请日：1978-05-22

    申请人： Fritz Hammon ,  Manfred Ohlinger ,  Job-Werner Hartmann

    发明人： Fritz Hammon ,  Manfred Ohlinger ,  Job-Werner Hartmann

    IPC分类号： G01R33/00 ,  G01N27/72 ,  G01N27/74 ,  G01R33/12 ,  G11B5/84 ,  G11B5/845

    CPC分类号： G11B5/845 ,  G01R33/1207 ,  Y10T137/0324 ,  Y10T137/2579

    摘要： In order to determine the homogeneity of a magnetic dispersion, part of the dispersion is conducted through a measuring cell prior to its application to a base, the size, number and type of those regions of the magnetic dispersion which interfere with the homogeneity being determined with the aid of magnetic measurements. The measuring cell contains a magnetic head, a magnetic dispersion is made to flow in a stream of constant cross section past the air gap of the magnetic head, and a magnetic field at least partially penetrating the magnetic dispersion is produced. From the characteristics of the amplified output voltage of the magnetic head the various parameters of the inhomogeneities in the magnetic dispersion can then be ascertained.

    摘要翻译： 为了确定磁性分散体的均匀性，分散体的一部分在施加到基底之前通过测量单元进行，磁性分散体的干扰均匀性的区域的尺寸，数量和类型由 辅助磁测量。 测量单元包含磁头，使磁性分散体以恒定横截面流过磁头的气隙，产生至少部分穿透磁性分散体的磁场。 根据磁头的放大输出电压的特性，可以确定磁性色散中的不均匀性的各种参数。

    Improving the magnetic properties of gamma-iron (III) oxide
    4.
    发明授权
    Improving the magnetic properties of gamma-iron (III) oxide 失效
    提高γ-铁（III）氧化物的磁性能

    公开(公告)号：US4212903A

    公开(公告)日：1980-07-15

    申请号：US770989

    申请日：1977-02-22

    申请人： Georg Schnell ,  Fritz Hammon ,  Manfred Ohlinger

    发明人： Georg Schnell ,  Fritz Hammon ,  Manfred Ohlinger

    IPC分类号： G11B5/706 ,  H01F10/00 ,  B05D5/12

    CPC分类号： G11B5/70647 ,  G11B5/70652 ,  G11B5/70657 ,  Y10S428/90

    摘要： The invention relates to a process for improving the magnetic properties, especially the remanent magnetization, of gamma-iron(III) oxide which can be used advantageously as the magnetic component in magnetic recording media exhibiting reduced print-through. For this purpose, a gamma-iron(III) oxide manufactured according to known processes is heated at temperatures of from 400.degree. to 700.degree. C., the magnetic pigment having basic compounds on the crystal surface during this heat treatment and retaining a pH value above 8 until heating is over. Gamma-iron(III) oxide magnetic pigments treated in this way are particularly suitable for the manufacture of low-noise magnetic recording media with high remanent magnetization and particularly low print-through.

    摘要翻译： 本发明涉及一种用于改善氧化铁（III）的磁性能，特别是剩余磁化的方法，该方法可以有利地用作磁记录介质中的磁性组分，这些磁性组分表现出减少的打印通量。 为此，根据已知方法制造的γ-铁（III）氧化物在400℃至700℃的温度下加热，该磁性颜料在该热处理期间在晶体表面上具有碱性化合物，并保持pH值 高于8，直到加热结束。 以这种方式处理的氧化镍（III）磁性颜料特别适用于制造具有高剩余磁化强度和特别是低打印通量的低噪声磁记录介质。

    Method and equipment for switching the operating conditions of a tape-recorder
    5.
    发明授权
    Method and equipment for switching the operating conditions of a tape-recorder 失效
    用于切换录音机的操作条件的方法和设备

    公开(公告)号：US4037259A

    公开(公告)日：1977-07-19

    申请号：US619232

    申请日：1975-10-03

    申请人： Fritz Hammon ,  Georg Schnell ,  Karl-Juergen Reimer

    发明人： Fritz Hammon ,  Georg Schnell ,  Karl-Juergen Reimer

    IPC分类号： G11B15/093 ,  G11B5/02 ,  G11B15/02 ,  G11B15/06 ,  G11B5/47

    CPC分类号： G11B5/02 ,  G11B15/02 ,  G11B15/06

    摘要： This invention concerns methods and devices for switching a tape-recorder or cassette tape-recorder and especially recorders on which tapes with different magnetic coatings can be used. According to the invention, at least one section along the magnetic tape which has a much higher electric resistance than the magnetic coating is used in conjunction with arrangements of simple layout and in advantageous manner to monitor the resistance of the tape either continuously or sporadically, and at least one predetermined switching state of the recorder is allocated to each different resistance value. This ensures reliable switching of any such states as "machine on", "machine off" or "iron oxide (chromium dioxide) tape" bias, without any other special changes at the magnetic tape or at the cassette.

    摘要翻译： 本发明涉及用于切换磁带录音机或盒式录音机的方法和装置，特别是可以使用具有不同磁性涂层的磁带的记录器。 根据本发明，沿着具有比磁性涂层高得多的电阻的磁带的至少一个部分与简单布局的布置结合使用，并且以有利的方式连续地或偶尔地监视磁带的电阻，以及 记录器的至少一个预定切换状态被分配给每个不同的电阻值。 这确保了“机器开启”，“机器关闭”或“氧化铁（二氧化铬）带”偏置等任何状态的可靠切换，而无需在磁带或磁带盒上进行任何其他特殊更改。

    Process and apparatus for the surface analysis of flexible materials
    6.
    发明授权
    Process and apparatus for the surface analysis of flexible materials 失效
    柔性材料表面分析的工艺和设备

    公开(公告)号：US4367951A

    公开(公告)日：1983-01-11

    申请号：US213794

    申请日：1980-12-08

    申请人： Fritz Hammon

    发明人： Fritz Hammon

    IPC分类号： G01B11/24 ,  B65H26/00 ,  G01B11/30 ,  G01N21/89 ,  G01N21/892 ,  G07D7/00 ,  G07D7/181 ,  G07D7/20 ,  G01B9/02

    CPC分类号： G07D7/20 ,  B65H26/00 ,  G01B11/306 ,  G07D7/0013 ,  G07D7/18

    摘要： The surface character of flexible materials is examined by means of interference fields which are formed by reflection of light beams from a reflecting reference surface and from the adjoining surface to be examined, and subsequent super-position of the partial beams thereby formed. The interference field which corresponds to the surface profile standing out from the reference surface is utilized to determine the length and height of the surface profile, with the aid of the interference band spacings and the wavelength of the incident light.

    摘要翻译： 柔性材料的表面特性通过由反射参考表面和相邻待检测表面的光束的反射形成的干涉场以及由此形成的部分光束的后续位置来检查。 借助于干涉带间隔和入射光的波长，对应于从参考表面突出的表面轮廓的干涉场用于确定表面轮廓的长度和高度。