Projectile used in

Over-all length

Maximum diameter

Thread diameter

Markings

This combustion type of fuze with settings up to 160 gives a maximum time of burning of 35 seconds at low elevation and more than 50 seconds at high elevations. With the ex-ecption of a graduated brass ring, the exposed part of the fuze is made of aluminum. The lower portion which screws into the shell is brass. There are two time rings, the lower one being the milled. The upper ring is locked to the fuze body by a locking pin. A recess off the center of the fuze contains the detonator holder, its stirrup spring, and a firing pin. The body is screw-threaded near the forward end to receive the tensionig nut and is reduced in diameter at the head to form a stem which is threaded to receive the cover plate and two locking nuts. The stop formed by the reduction in diameter at the head has in it a partly circular groove, the ends of which are connected with vertical grooves in the recess containing the detonator. A brass cover plate fits in the inside of the fuze to cover the detonator and the curved groove in the body.

On setback, the detonator moves back against its stirrup spring to hit the firing pin. The flash is passed to the upper time ring and ignites the fuze powder. The upper ring burns around to the flash pellet in the lower ring. The lower ring burns around to the flash pel-let, then to the main charge in the base. This is the normal combustion time type.

Figure 222
Nose Time Fuze O.T. 32