PROJECTILE FOR THE DISPERSAL OF A LOAD WITH TIME DELAY

摘要

The invention relates to a projectile which is characterized by delayed dispersion of the filler after being fired from a launching tube (1) by means of a hot gas under pressure. This projectile comprises a cylindrical casing (2) having a transverse wall (3) one side of which there is a first pressure chamber (7) externally delimited by an external lateral wall (4) which has a feed opening (5) for the hot gas. The side wall (3) defines on its other side a second pressure chamber (9), which is formed by the casing and by a piston (8) which is mobile axially inside the casing and which is placed in connection with the load (10). A throttle passage (11) for gas is provided between the first and second pressure chambers (7, 9). Under the effect of pressure build-up in the second pressure chamber, the piston (8) is caused to perform an axial movement, thereby ensuring the firing of the load (10) from the casing (2), for provided that the pressure has reached a predetermined level. The projectile is particularly characterized in that a fibrous material (16) having a relatively good thermal conductivity, for example steel wool, is arranged in the first pressure chamber (7) so that the gas pressure leads into the first pressure chamber remains relatively constant over time, the pressure of gas led into the second pressure chamber (9) and undergoing a relatively constant increase per time unit.