Projectile used in

Over-all length

Maximum diameter

Thread diameter

Marking

This fuze has three combustion rings, the upper and lower being movable and joined by a piece of flat metal. The center ring is fixed to the body by two small rivets. The initiating parts of the time and percussion mechanism are fitted with safety pins which are atta-ched to a ring. These must be removed before firing. The time mechanism is  of the standard type, having the detonator holder held by stirrup. The percussion mechanism has an arming ring, stirrup spring, detonator, and creep spring, all located in the base of the fuze.

Time Mechanism: On firing, the detonator sets back against the action of the stirrup spring onto the firing pin and sends a flash to the time rings. The time rings burn to the flash pellet in the base of the fuze. This sets off the charge.

Percussion Mechanism: On firing, an arming ring sets back against a stirrup spring and frees the detonator holder, which is now held off the firing pin by a creep spring. On im-pact, the detonator holder moves forward and forces the detonator into the firing pin.

Figure 219
Time and Percussion Nose Fuze A.D.E. M12