(Fig. 6)

This electric fuze is provided for use with the 15 cm and 21 cm rocktes. The overall di-mensions and general shape of the fuze are shown in Fig. 6.

The fuze consists essentially of a body, holder, fuze head, two leads, two contacts, pri-ming composition and gunpowder pellets.

The body is black plastic material, the lower half is cylindrical and the upper half coned and formed with a spigot. It is bored centrally in three diameters to form two chambers and, in the base, a recess. The top chamber forms a magazine containing three perfora-ted pellets of gunpowder; it is closed by turning the top of the spigot over an aluminium closing disc. The lower chamber accommodates a pellet of wax substance in a tubular cardboard container which forms a holder for the fuze head and the end of two isulated leads. The fuze head is surrounded by a blob of priming composition, composed of a mix-ture of lead picrate, nitrocellulose, charcoal and potassium nitrate. The recess in the base is closed by an inverted tin plate cup which forms a contact, to which the end of one of the leads is soldered. The other lead is passed through a radial hole and a channel cut in the periphery of the body, the end being soldered to a thin aluminium or tin plate sheath covering the coned surface of the body, which forms the earth return contact.

The electrical circuit is through the base contact, insulated lead, fuze head, return lead and the earth return sheath.

The electrically-heated bridge wire in the fuze head ignites the priming composition, which in turn fires the gunpowder pellets in the magazine. The flash from the magazine ignites the igniter in the rocket.

Fig. 6