F - Mech Eng,Light,Heat,Weapons – 42 – B
Patent
F - Mech Eng,Light,Heat,Weapons
42
B
102/18
F42B 5/28 (2006.01)
Patent
CA 1267564
ABSTRACT OF THE DISCLOSURE A cartridge for use with a revolver, automatic or submachine gun has a brass casing. The interior of the casing has a substantially planar bottom wall extending radially from its flash hole. A primer pocket in the base communicates through the flash hole with the casing interior within which the powder is ignited. A parabolic curved section extends from the planar bottom wall to a sloped wall section. The slope is in the range from substantially 5 to 15 degrees. The casing wall thus narrows forwardly and terminates in an area of substantially uniform or constant thickness within which the bullet is frictionally retained. With the parabolic curved section, the relocation of forces due to the discharging gases is substantially in a line which is parallel with the longitudinal axis of the cartridge. The projectile velocity is thus substantially increased without subjecting the cartridge to undesired expansion, cracking or distortion. This increases the firepower while eliminating the jamming problems occasionally incurred during the firing of automatic weapons.
460469
Gowling Lafleur Henderson Llp
Spalding Raymond Don
LandOfFree
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