| 摘要 |
<p>1. Pyrotechnical device for anchoring stakes or the like into the ground, comprising a stake (6, 28) and means of sinking said stake into the ground, which means comprise a breech (2) equipped with means (8) of firing a cartridge (5) and extended at its bottom part by a guide-tube (1/16) comprising, at its lower end, means of removing the air contained in the tube (1/16), characterized in that the tube (1/16) is designed to receive either a stake (6), or a movable mass (24) for hitting said stake (28) and in that said stake (6), which is introduced into the guide-tube (1/16) or the mass (24), is provided at its upper part with a head (10) which comprises shearable means of (10a) of holding said stake (6) or said mass (24) in position in the tube (1/16) before firing, so as to place the head (10) in resting contact against the breech (2), said breach comprising a housing (4a) for said cartridge (5), said housing being extended towards the part containing the head (10) by a gas-expanding chamber (4f), defined at its lower part by said head (10), said device further comprising means (4e/7) of improving tightness in the gas-expanding chamber (4f) at right angles with the junction of the head (10) with the breech (2), said chamber increasing in volume at firing time, as the stake or the mass (24) progresses into the guide-tube (1/16).</p> |
