DESCRIPTION. The upper body of the fuze is cone-shaped. A suspension lug is the clockwork arming mechanism. Several recesses for screws, and spanner openings are cut into the lower part of the cone. A cylindrical piece, threaded to screw into the nose of the bomb, is formed with the lower conical section. This cylindrical part is bored to recei-ve the primer housing which surrounds the striker channel. Below this is placed a fitting holding a powder train with a cap beneath and the base is closed with a standard gaine. (See fig. 133.)

Desired setting is obtained by adjusting a grub screw which is screwed into the fuze body and interrupts the flash channel.

OPERATION. When the bomb is released from the container, the safety pin is withdrawn and releases a spring-loaded safety bolt which frees the hammer. The hammer is a part of the suspension lug. The removal of the safety pin releases the spring loaded safety bolt which engages the teeth on the pinion. As the safety bolt moves in a direction per-pendicular to the plane of the paper, it rotates the pinion which in turn moves the gear train. When a recess on the safety bolt comes opposite the spring-loaded plunger, the plunger springs out disengaging the inertia striker thus arming the fuze. On impact, the striker is forced down-wards against the creep spring and detonates the percussion cap. If the fuze is intended for instantaneous action, the flash from the cap passes through the channel to the explosive cap which in turn detonates the gaine.

Figure 133 – (3) Mechanical Nose Impact Fuze