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    • 9. 发明授权
    • Static discharge disc
    • 静电放电盘
    • US4307663A
    • 1981-12-29
    • US96079
    • 1979-11-20
    • Donald M. Stonestrom
    • Donald M. Stonestrom
    • H05F7/00F42B3/18
    • F42B3/18
    • Electroexplosive device and static discharge element therefor. The electroexplosive device herein has a cylindrical metallic casing which is open at one end and closed at the other end, a bridge element and lead wires therefor, a static discharge disc surrounding the lead wires for preventing accidental ignition due to static electricity, and a ferrite sleeve surrounding the lead wires to prevent accidental initiation due to radio frequency currents. The static discharge element comprises a nonconductive circular substrate having a slotted opening for the lead wires, and a conductive coating layer on at least one face of the substrate to conduct electricity from the leads to the casing in the event of electrostatic discharge. This conductive layer should be in electrical contact with the casing but not with the lead wires; to that end the substrate is left uncoated in the immediate vicinity of the opening. The ferrite sleeve is in electrical contact with the casing through a solder layer but is electrically insulated from the lead wires by a nonconductive thermal plastic material.
    • 电爆炸装置及静电放电元件。 本发明的防爆装置具有在一端开口并在另一端封闭的圆筒形金属外壳,桥元件及其导线,围绕引线的静电放电盘,用于防止静电引起的意外点火;以及铁氧体 围绕引线的套筒,以防止由于射频电流而意外启动。 静电放电元件包括​​具有用于引线的开槽开口的非导电圆形基板,以及在基板的至少一个面上的导电涂层,以在静电放电的情况下将导线从引线传导到壳体。 该导电层应与壳体电接触而不与导线接触; 为此,衬底在开口附近不被涂覆。 铁氧体套管通过焊料层与壳体电接触,但是通过非导电热塑性材料与引线电绝缘。