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热词
    • 70. 发明授权
    • Line protector for a communication circuit
    • 用于通信电路的线路保护器
    • US3794947A
    • 1974-02-26
    • US3794947D
    • 1971-10-06
    • RELIABLE ELECTRIC CO
    • BAUMBACH B
    • H02H9/06H01H37/76H01H71/20H01T1/14H01T4/10H02H7/24H01H79/00
    • H01H71/205H01T1/14
    • A plug-in line protector for a communications circuit provides protection for over voltage and over current conditions of the line. A cup and slug module containing carbon blocks provides an air gap for grounding high voltage transients. For an over current condition, a solder pellet melts causing the cup and slug to engage due to spring pressure and ground the line through a grounding strip. The grounding strip has plastic insulation bonded to a portion thereof and interposed between the line and ground. In an over current condition heat from one of the carbon blocks is transferred through the cup to the metalic strip. This heat may cause the plastic to melt to provide a back-up or secondary low resistance path to ground. The protector may also have a resettable over current responsive mechanism in the form of a heat coil in the line. When the heat coil breaks, a printed circuit board, on which the heat coil is mounted, is moved by a volute spring. In over voltage and in over current conditions, the volute spring conducts current from the printed circuit board to the slug and cup and to ground.
    • 用于通信电路的插入式线路保护器为线路的过压和过流状况提供保护。 包含碳块的杯和块塞组件提供用于接地高电压瞬变的气隙。 对于过电流条件,焊料颗粒熔化,导致杯和块由于弹簧压力而接合,并将线路接地线。 接地条具有与其一部分结合并插入在线和地之间的塑料绝缘体。 在过电流条件下,来自一个碳块的热量通过杯被转移到金属带。 这种热量可能导致塑料熔化,以提供对地的备用或次要低阻力路径。 保护器还可以具有线路中热线圈形式的可重置的过电流响应机构。 当热线圈断裂时,安装有热线圈的印刷电路板被蜗壳弹簧移动。 在过电压和过电流条件下,蜗壳弹簧将电流从印刷电路板传导到电池,杯子和接地。