Two sided magnetic disk drive apparatus with controlled timing means
    11.
    发明授权
    Two sided magnetic disk drive apparatus with controlled timing means 失效
    具有受控定时装置的双面磁盘驱动装置

    公开(公告)号:US4602301A

    公开(公告)日:1986-07-22

    申请号:US570357

    申请日:1984-01-13

    CPC分类号: G11B19/02 G11B15/12 G11B5/016

    摘要: A magnetic disk drive apparatus writes data in a magnetic disk by use of first and second magnetic heads. The track position on the magnetic disk where the first or second magnetic head exists is detected, and a delay time corresponding to the detected track position is set into a timer circuit. In the write-in mode, a CPU starts the operation of a read/write head section of the selected one of the first and, second magnetic heads and thereafter, when a delay time which is set into the timer circuit has passed, the CPU starts the operation of an erase head section of the selected one of the first and second magnetic heads.

    摘要翻译: 磁盘驱动装置通过使用第一和第二磁头将数据写入磁盘。 检测存在第一或第二磁头的磁盘上的轨道位置,并将与检测到的轨道位置相对应的延迟时间设置为定时器电路。 在写入模式中,CPU开始对第一和第二磁头中所选择的一个的读/写头部的操作,之后当设置到定时器电路的延迟时间过去时,CPU 开始第一和第二磁头中所选择的一个的擦除磁头部分的操作。

    Floppy disk drive apparatus
    12.
    发明授权
    Floppy disk drive apparatus 失效
    软盘驱动器

    公开(公告)号:US4599659A

    公开(公告)日:1986-07-08

    申请号:US607256

    申请日:1984-05-04

    申请人: Shunji Saito

    发明人: Shunji Saito

    CPC分类号: G11B19/20 G11B5/553

    摘要: A floppy disk drive apparatus includes a control signal generating circuit for generating a step signal and a direction instruction signal, head driving section for driving a magnetic head in the radial direction of a floppy disk, and a detector circuit for generating an output signal when the magnetic head locates in the outer limit location of the floppy disk. The detector circuit is inhibited from generating an output signal in response to the direction instruction signal generated for driving the magnetic head in an inner direction of the floppy disk.

    摘要翻译: 软盘驱动装置包括用于产生步进信号和方向指示信号的控制信号产生电路,用于在软盘的径向上驱动磁头的磁头驱动部分和用于在软盘驱动时产生输出信号的检测器电路 磁头位于软盘的外部极限位置。 响应于在软盘的内部方向上驱动磁头而产生的方向指示信号,禁止检测器电路产生输出信号。

    Thermionic emission cathodes
    13.
    发明授权
    Thermionic emission cathodes 失效
    热离子发射阴极

    公开(公告)号:US4279784A

    公开(公告)日:1981-07-21

    申请号:US972873

    申请日:1978-12-26

    CPC分类号: H01J1/13

    摘要: A thermionic emission cathode comprising a base metal made of nickel-tungsten series alloy, for example an alloy comprising 90 to 70% by weight of nickel and 10 to 30% by weight of tungsten, and an emitter layer, which is formed on the base, made from a mixture of (a) tungsten powder or nickel-tungsten alloy powder comprising 90 to 70% by weight of nickel and 10 to 30% by weight of tungsten, (b) Ba.sub.3 WO.sub.6 powder and (c) zirconium powder or ZrH.sub.2 powder, and if necessary interposing a powder layer between the base and the emitter layer, said powder layer having the same composition as the base metal and a particle size of 1 to 10 .mu.m sealed on the surface of the base with a distribution density of 0.5 to 5.0 mg/cm.sup.2, can be applied to both directly and indirectly heated type cathodes. Said cathode has such advantages as being able to be miniaturized and to have high current density.

    摘要翻译: 包括由镍 - 钨系列合金制成的贱金属的热离子发射阴极,例如包含90至70重量%的镍和10至30重量%的钨的合金以及形成在基底上的发射极层 由(a)钨粉或镍钨合金粉末的混合物制成,所述粉末包含90〜70重量%的镍和10〜30重量%的钨,(b)Ba3WO6粉末和(c)锆粉末或ZrH2粉末 并且如果需要,在基底和发射极层之间插入粉末层,则所述粉末层具有与基底金属相同的组成和1μm至10μm的粒径,密封在基底的表面上,分布密度为0.5 至5.0mg / cm 2,可以应用于直接和间接加热型阴极。 所述阴极具有能够小型化并具有高电流密度的优点。

    Head-positioning control method and device for a disk device
    14.
    发明授权
    Head-positioning control method and device for a disk device 失效
    磁头装置的磁头定位控制方法和装置

    公开(公告)号:US06646824B1

    公开(公告)日:2003-11-11

    申请号:US09685111

    申请日:2000-10-10

    IPC分类号: G11B5596

    CPC分类号: G11B5/59627

    摘要: This invention relates to a head-positioning method and device for positioning the head, that reads a disk medium, to a specified position. A disk device having a head, actuator and control circuit comprises: a demodulation unit for demodulating the demodulated position from the head output, a calculation unit for calculating the error between the demodulated position and target position, and a gain-correction unit for correcting the error with a gain. Since a relative position is used, it is possible to accurately detect the position error, for which the non-linear characteristics of the head sensitivity distribution have been corrected, at each offset position.

    摘要翻译: 本发明涉及一种头部定位方法和装置,用于将读取磁盘介质的磁头定位到指定位置。 具有头,致动器和控制电路的盘装置包括:解调单元,用于解调头部输出端的解调位置;计算单元,用于计算解调位置和目标位置之间的误差;增益校正单元,用于校正 有增益的错误 由于使用了相对位置,因此可以在每个偏移位置精确地检测头灵敏度分布的非线性特性已被校正的位置误差。

    Apparatus for character output with modification of character code array
    15.
    发明授权
    Apparatus for character output with modification of character code array 失效
    用于字符代码阵列修改的字符输出装置

    公开(公告)号:US5150460A

    公开(公告)日:1992-09-22

    申请号:US765466

    申请日:1991-09-26

    CPC分类号: G06K15/128 G06K2215/0014

    摘要: This invention proposes an output apparatus for storing a plurality of internal character code data for accessing character fonts corresponding to input code data and outputting a character pattern on the basis of the internal character code data, wherein input command data is identified and some of the plurality of internal character code data may be changed on the basis of a change command.

    摘要翻译: 本发明提出了一种输出装置,用于存储用于访问与输入代码数据对应的字符字体的多个内部字符代码数据,并且基于内部字符代码数据输出字符模式,其中识别输入命令数据,并且存在多个 的内部字符代码数据可以基于改变命令而改变。

    Floppy disk drive apparatus
    16.
    发明授权
    Floppy disk drive apparatus 失效
    软盘驱动器

    公开(公告)号:US4563712A

    公开(公告)日:1986-01-07

    申请号:US566500

    申请日:1983-12-29

    CPC分类号: G11B5/54 G11B19/04 G11B5/58

    摘要: A floppy disk drive apparatus includes a drive section to drive a carrier, to which a magnetic head is attached, in the radial direction of a floppy disk. The drive apparatus further includes a detecting section for detecting when the magnetic head is located in the outer peripheral or inner peripheral limit location of the floppy disk, and a control section for interrupting the operation of the drive section in response to an output signal from the detecting section.

    摘要翻译: 软盘驱动装置包括驱动部分,用于在软盘的径向上驱动安装有磁头的载体。 驱动装置还包括检测部分,用于检测磁头何时位于软盘的外周或内周极限位置;以及控制部分,用于响应于来自所述驱动装置的输出信号中断驱动部分的操作 检测部分。

    Floppy disk drive apparatus
    17.
    发明授权
    Floppy disk drive apparatus 失效
    软盘驱动器

    公开(公告)号:US4547820A

    公开(公告)日:1985-10-15

    申请号:US565919

    申请日:1983-12-27

    申请人: Shunji Saito

    发明人: Shunji Saito

    CPC分类号: G11B17/022 G11B19/12

    摘要: A floppy disk drive apparatus includes an index hole sensor, a spindle for holding a floppy disk, and a motor for rotating the spindle. The index hole sensor generates a high-level signal when the floppy disk is set on the spindle. The floppy disk drive apparatus is provided with a motor drive circuit which drives the motor in response to the high-level signal from the index hole sensor.

    摘要翻译: 软盘驱动装置包括索引孔传感器,用于保持软盘的主轴和用于旋转主轴的马达。 索引孔传感器在软盘设置在主轴上时产生高电平信号。 软盘驱动装置具有电动机驱动电路,该电动机驱动电路响应于来自分度孔传感器的高电平信号而驱动电动机。