Electromagnetic linear-motion device
    6.
    发明授权
    Electromagnetic linear-motion device 失效
    电磁线性运动装置

    公开(公告)号:US4259602A

    公开(公告)日:1981-03-31

    申请号:US30138

    申请日:1979-04-16

    CPC分类号: H02K41/031

    摘要: An electromagnetic linear-motion device in which a field magnet unit mounted on a movable unit slidably supported on elongated guide members is movable longitudinally between and along a pair of spaced parallel stationary linear armatures so that any objectionable forces producing increased frictional forces between the movable unit and the guide members are cancelled by each other.

    摘要翻译: 一种电磁线性运动装置,其中安装在可滑动地支撑在细长导向件上的可移动单元上的场磁体单元可在一对间隔开的平行静止线性电枢之间沿纵向移动,使得任何令人不快的力在可动单元之间产生增加的摩擦力 并且引导构件被彼此取消。

    Dual drive system for phono pickup arm
    8.
    发明授权
    Dual drive system for phono pickup arm 失效
    双驱动系统,用于唱机拾音臂

    公开(公告)号:US4580257A

    公开(公告)日:1986-04-01

    申请号:US458591

    申请日:1983-01-17

    IPC分类号: G11B3/095 G11B3/38

    CPC分类号: G11B3/0957

    摘要: A dual drive system for an automatic record player of a type in which programmed music selection can be carried out. The drive system includes a mechanical first drive system for mechanically driving the pickup arm and an electromagnetic second drive system for driving the pickup arm using an electromagnetic force. Circuitry is provided for selecting between the two drive systems in accordance with the selected operational mode of the player or the position of the pickup arm.

    摘要翻译: 一种用于可以进行编程音乐选择的类型的自动唱机的双驱动系统。 驱动系统包括用于机械驱动拾取臂的机械第一驱动系统和用于使用电磁力驱动拾取臂的电磁第二驱动系统。 电路被提供用于根据所选择的演奏者的操作模式或拾取臂的位置在两个驱动系统之间进行选择。