Residual bobbin thread amount detecting apparatus for a sewing machine
    1.
    发明授权
    Residual bobbin thread amount detecting apparatus for a sewing machine 失效
    用于缝纫机的残留BOBBIN螺纹检测装置

    公开(公告)号:US5161475A

    公开(公告)日:1992-11-10

    申请号:US704066

    申请日:1991-05-22

    IPC分类号: D05B59/02

    CPC分类号: D05B59/02

    摘要: A residual bobbin thread amount detection apparatus for a sewing machine which includes a hook rotating in association with a main shaft of the sewing machine and a bobbin rotatably mounted on the hook. A first detector detects the rotation speed of the main shaft and a second detector detects the rotation speed of the bobbin. A comparator responsive to the second detector generates a signal when the rotation speed of the bobbin exceeds a predetermined value, whereby a controller operates an alarm.

    摘要翻译: 一种用于缝纫机的残留底线量检测装置,其包括与缝纫机的主轴相关联地旋转的钩和可旋转地安装在钩上的筒管。 第一检测器检测主轴的转速,第二检测器检测线轴的转速。 响应于第二检测器的比较器在线轴的转速超过预定值时产生信号,由此控制器进行报警。