Fig. 10

This fuze which is constructed partly in bronze and partly in steel, is of the combustion type with two time rings filled with powder burning composition, the top ring being fixed and the bottom movable. The bottom ring revolves between two felt washers and is gra-duated from 0 to 241 subdivided into tenths the fuze being set by revolving the bottom ring until the required graduation is opposite an index line on the base of the fuze. To protect the powder filling against moisture, a cap is placed over the fuze and is soldered to the base. Presumably some form of waterproofing the time rings is also used.

The time mechanism consists of a primer case supported by a safety clip and held in po-sition by a safety pin which is withdrawn at the moment of loading.

Only fragments of the percussion system were found. These consisted of a striker fitted with an aluminum head. No manufacturing marks were visible.

On firing the primer case sets back crushing the safety clip and strikes the percussion pin. The flash is carried to the upper time ring which burns for a period dependent on the setting, then to the lower graduated ring and eventually by the diagonal channel to the magazine in the ordinary way.

The gas from the burning composition in the time rings escapes through large vents, one in each time ring.

Fig. 10