Grinding device
    1.
    发明授权

    公开(公告)号:US06503135B2

    公开(公告)日:2003-01-07

    申请号:US09873523

    申请日:2001-06-05

    IPC分类号: B24B1900

    CPC分类号: A01F29/22

    摘要: A chopper drum includes a plurality of knives distributed along its width and about its circumference. A grinding device is provided for automatically sharpening the knives, with a grinding stone of the grinding device having its movement automatically controlled by a microprocessor, which receives signals from an actual shape sensor and compares it with a stored desired shape and generates control signals, such that it shapes the profile of the chopper drum to at least approximate the desired shape.

    Dual switch control system
    3.
    发明授权
    Dual switch control system 失效
    双开关控制系统

    公开(公告)号:US06388860B1

    公开(公告)日:2002-05-14

    申请号:US09507098

    申请日:2000-02-17

    IPC分类号: H01H4700

    CPC分类号: A01F29/16 H01H47/002

    摘要: A quick stop circuit for a spring applied quick stop mechanism coupled to an electrically operated actuator includes a dual quick stop switch which includes a simultaneously operated normally open switch and a normally closed switch. The closing of the normally open switch causes control units to turn off a relay which controls energizing of the actuator through an actuator relay. The opening of the normally closed switch de-energizes a quick stop relay which disconnects the driver from its power source, which also de-energizes the actuator relay, which de-energizes the actuator so that the spring applied quick stop mechanism will move to its stop position.

    摘要翻译: 用于弹簧施加的快速停止机构的快速停止电路耦合到电动致动器包括双重快速停止开关,其包括同时操作的常开开关和常闭开关。 常开开关的关闭使得控制单元关闭继电器,该继电器通过致动器继电器来控制致动器的通电。 常闭开关的断开使快速停止继电器断电,从而使驱动器与其电源断开,该继电器也使致动器继电器断电,致动器继电器使致动器断电,使得弹簧施加的快速停止机构将移动到其 停止位置