Base fuze of a spinning projectile possessing an inertia body

A base fuze for a spinning projectile having a firing direction, comprising:

• a detonator capsule;
• a firing pin for piercing said detonator capsule;
• a hammer sleeve operatively connected to said firing pin;
• an inertia body for increasing the response sensitivity of the base fuze;
• said inertia body being positioned rearwardly with respect to the firing direction of the projectile behind said hammer sleeve such that upon impact of the projectile at the target said inertia body directly bears against said hammer sleeve in order to increase the effect of the mass of said hammer sleeve during piercing of said detonator capsule by means of said firing pin by virtue of the moment of inertia of said inertia body;
• a fuze housing possessing a bore therein;
• said bore possessing an inner wall;
• said inertia body being axially and radially movable within said bore;
• said base fuze being provided with at least one forwardly enlarging conical surface disposed within said fuze housing;
• said inertia body being subdivided into a number of sector-shaped portions;
• and
• said number of sector-shaped portions being radially movable away from one another due to the effect of the spin of the projectile, thereby engaging said inner wall of said bore such that such inertia body, under the influence of the projectile spin, axially impacts against said hammer sleeve.