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    • 8. 发明授权
    • Electromagnetic bobbin thread supply alarm
    • 电磁底线报警
    • US4180007A
    • 1979-12-25
    • US3340
    • 1979-01-15
    • Wesley R. PetersonWolfgang Jaffe
    • Wesley R. PetersonWolfgang Jaffe
    • B65H63/08D05B59/02D05B45/00
    • D05B59/02B65H63/082B65H63/086B65H2701/31D05D2207/06
    • A low bobbin thread supply alarm in which a bobbin case is fitted with lever pivoted thereon and carrying a permanent magnet for travel to the hub of the bobbin. An arm overhanging the bobbin case and bobbin carries a Hall generator in a portion thereof overlying the hub of the bobbin. The lever and permanent magnet carried thereby is urged by an electromagnet supported externally of the looptaker toward and away from the hub of the bobbin at suitable intervals. When the lever pivots greater than a given amount due to depletion of thread on the hub of the bobbin the permanent magnet on the lever will trigger a voltage change on the Hall generator which may cause an appropriate alarm to provide a warning of a low thread condition.
    • 一种低底线供应报警器,其中梭壳装有枢转在其上的杆,并承载用于行进到筒管轮毂的永磁体。 悬挂在梭壳和梭筒上的臂在其一部分上覆盖着筒管的轮毂的霍尔发生器。 由此携带的杠杆和永磁体以适当的间隔被从支架外侧支撑的电磁铁推向绕线轴的毂。 当杠杆由于线轴的轮毂上的螺纹耗尽而枢转大于给定量时,杠杆上的永磁体将触发霍尔发生器上的电压变化,这可能导致适当的报警以提供低线程状态的警告 。