(Fig. 2)

The main parts are accommodated in a cylindrical steel container closed by a steel was-her and consists of an inertia pellet with needle, arming collar, three springs, detonator, and detonator holder. All except the detonator, are made of steel.

The inertia pellet and arming collar are hollow cylinders with an external flange at one end to form bearing for a steel spring surrounding them. Both have free longitudinal mo-vement inside the container, the arming collar being arranged to move telescopically over the inertia pellet. The other end of the inertia pellet is closed except for three flash holes and has the needle and a distance piece secured to it.

The distance piece is made in two diameters. It supports a spiral spring, whilst the fuze is in the unarmed condition, and a wire locking spring, hexagonal in shape, is fitted around the smaller diameter.

The detonator holder and closing washer are supported on a step at the end of the con-tainer and secured by turning over the continuation of it.

On acceleration the arming collar sets back so that the spiral and hexagonal springs ex-pand. The hexagonal spring locks the arming collar to the inertia pellet and the whole is free to move forward through the expanded spiral spring when the flight of the projectile is checked.

Fig. 2