1342105 Fuzes D S BREED 24 Feb 1971 5349/71 Heading F3A [Also in Division F2] Triggering of the arming and/or self-destruction mechanism of ordnance, e.g. a mine, is delayed by a dashpot comprising a cylinder 12 containing a high viscosity fluid and a loosely fitting piston 14 (which may be ball-shaped), flow past the piston being creeping flow in the lubrication region at a Reynolds number less than one, i.e. with viscous forces predominating over inertial forces. The fluid may be a silicone, with a viscosity from 0À65 centistokes to 2À5 million centistokes, or a rubber gum. The ratio of the piston-cylinder clearance to the radius of the piston is 0À01 or less. At the initiation of the timing sequence, a plunger 32 biased by a spring 34 punctures a sealing boot 30 and engages the piston. The cylinder is internally stepped so that the piston descends more rapidly through the upper portion of the cylinder than through the lower portion.
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机译：1342105 Fuzes D SREED 1971年2月24日5349/71标题F3A [也在F2分区中]触发军械的装甲和/或自毁机制，例如：地雷通过一个减震器而延迟，该减震器包括一个装有高粘度流体的缸体12和一个松配合的活塞14（可以是球形），经过活塞的流以小于1的雷诺数在润滑区域中以蠕变流的形式流动。也就是粘性力超过惯性力。流体可以是粘度为0-65厘to到2-5百万厘ist的硅树脂或橡胶胶。活塞缸间隙与活塞半径之比为0‑01或更小。在定时序列开始时，由弹簧34偏压的柱塞32刺穿密封套30并接合活塞。气缸在内部呈阶梯状，因此活塞通过气缸的上部比通过下部的下降更快。
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