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    Elapsed time indicator
    1.
    发明授权
    Elapsed time indicator 失效
    时间指示器

    公开(公告)号：US3706865A

    公开(公告)日：1972-12-19

    申请号：US3706865D

    申请日：1971-12-07

    申请人： US ARMY

    发明人： PORTER FRANK K JR ,  SONJARA BORIS

    IPC分类号： H01H13/24 ,  H01H43/24 ,  H01H43/28 ,  H01H35/34

    CPC分类号： H01H43/28 ,  H01H13/24 ,  H01H43/24

    摘要： An elapsed time indicator or delay switch including a cylindrical housing of non-magnetic material closed at one end by a base of magnetic material. A pair of spaced apart electrically conducting terminals insulated from and extending into and through the base. A permanent magnetic piston slidably positioned within the housing, spaced from said base and having a viscous fluid therebetween. A pressure releasable piston retainer disposed above the piston for limiting the movement thereof and a flexible deformable diaphragm, proximate the retainer, closing the opposite end of the housing. The device is initiated upon pressure being applied to the diaphragm which thereupon deflects the retainer and releases the piston that in turn is attracted toward the base and moves theretoward at a rate dependent, among other factors, on the fluid viscosity, the magnetic force, initial spacing and the clearances between the housing and the piston. Piston travel terminates upon contact with the inner terminals and electrical shorting thereof which may be used to indicate the end of the elapsed period.

    摘要翻译： 经过的时间指示器或延迟开关，其包括非磁性材料的圆柱形壳体，其一端通过磁性材料的基部封闭。 一对间隔开的导电端子，绝缘并延伸穿过基座。 永久磁性活塞可滑动地定位在壳体内，与所述底座间隔开并且在其间具有粘性流体。 设置在活塞上方以限制其运动的压力可释放活塞保持器和靠近保持器的柔性可变形隔膜封闭壳体的相对端。 该装置在压力施加到隔膜上时启动，随后使保持器偏转并释放活塞，该活塞又被吸引到基座并以其它因素取决于流体粘度，磁力，初始 间隔和壳体与活塞之间的间隙。 活塞行程与内部端子接触终止，并且电气短路可用于指示经过时间的结束。