DESCRIPTION: This fuze is used over a gaine and is designed on the combined direct and graze action princip for sensitivity and instantaneous functioning. (See fig. 570.)

The hollow ovigal aluminum head of the fuze is screwed on the body and secured by a grub screw. The hole formed in the nose of the head to receive the outer end of the wooden hammer is closed by a brass disk. The disk is secured by a brass ring.

The aluminum body has a hollow cylindrical projection on its front face in which the base end of the wooden hammer is housed in contact with a striker holder. The striker holder carries a steel striker, secured by a screwed plug, and is supported by a brass shearing wire. The body is recessed and screw-threaded from the underside to receive the pellet holder.

The pellet holder is of steel is recessed to carry the inertia pellet. A flash hole is formed in the base of the recess for the passage of the flash from the detonator to the gaine. Five centrifugal segments of brass with steel pivot pins are fitted on the front face of the holder and are posioned to overlap the inertia pellet by an expanding spring ring.

The inertia pellet carries an igniferous detonator secured by a perforated screwed plug and has a creep spring position between it and the striker holder.

ACTION: During flight, the expanding spring ring is opened and the segments rotated clear of the inertia pellet by centrifugal force. The striker and the pellet are then held apart by the shearing wire and creep spring only. On impact, or gaze, the striker driven in by the wooden hammer, and the wire sheared, whilst the inertia pellet overcomes the creep spring and carries the detonator forward. The flash produced by the piercing of the detonator passes through the hole in the base of the pellet holder to the gaine in the exploder container of the projectile.

Figure 570 – E.K. Zdr. C/28