EMPLOYMENT: Nose fuze used in 20-mm Aircraft Cannon Ammunition (See fig. 555.)

CONSTRUCTION: The single piece body has a closing disk in the nose and threads at the base to engage the projectile.

A shoulder on the floating striker bears against two half collars on the bottom and a light spring on the top. The bottoms of the half collars are locked in a seat in the fuze body and are kept there by the force of the light spring.

ACTION: The striker and half collars are held in position during the initial phases of the projectile's flight. Upon deceleration, however, the striker creeps forward, compressing the spring and thus freeing the half collars. These collars creep forward out of the seat and are seperated by centrifugal force. The striker is then permitted to pierce the deto-nator upon impact.

Figure 555 – A.Z. 1531