| 摘要 |
1,170,180. Powder dispensing projectiles. AAI CORP. 29 Dec., 1967 [30 Dec., 1966], No. 59232/67. Heading F3A. [Also in Division F1] A powder dispenser comprises a body 13 of plastics material, e.g. nylon, containing the powder 25, a piston 27 movable by gaseous pressure produced by an explosive charge 49 to discharge the powder, and a shear-type closure member 17 which is sheared by the movement of piston 27 acting through a lost motion linkage 31. In operation, a handle 63 is released by removing a pin 65, a spring-loaded striker 67 then striking a primer 61 which ignites a timedelay fuse 55. An explosive propellant charge 49 is fired by fuse 55 and blows out a cover 51 and shear disc 43. The propellant gases move piston 27 towards closure member 17. When the gap between projections 17a, 27a in tube 29 of linkage 31 has closed, member 17 is sheared off and discharged together with a protective cover 23 and tube 29, followed by the powder. A shear portion 27b on piston 27 is sheared by the gas pressure if skirt 27c seizes. The lost motion linkage may alternatively comprise a solid rod between cup portions of closure member 17 and piston 27, or tube 29 may be fixed to either member 17 or piston 27.
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