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Four models of friction fuzes were designed for use in the German stick
grenades (pota-tomasher grenades). The friction fuze 24 (B.Z. 24) (fig.
51) and the friction fuze 39, modified (B.Z. 39 umg.) (fig. 52) were
used in the the stick percussion grenades. The friction fuze for smoke
charges 38 (Nebelbrennzünder 38; Nb.B.Z. 38) (fig. 52), and the friction
fuze 39 (B.Z. 39) (fig. 52) were used in the stick smoke grenades. All
four of these fuzes have a cylindrical, softmetal case. All of them
function by pulling a coated pull wire through a capsule filled with a
chemical compoud. Each fuze has a 4 1/2 se-conds delay pellet screwed into
its base, and each has a standard-threaded detonator adapter screwed
onto the base of the delay pellet. The friction fuzes 39 and 39 modified
are later models of the friction fuze for smoke charges 38 and the
friction 24, respect-ively. The friction fuzes for smoke charges 38 and
the frictionfuze 39 have a white ring painted around the case, near the
base. The friction fuze 39 has five small holes in its threaded base.
Figure 51 shows a cutaway view of the friction fuze 24. The internal construction of the other three fuzes is essentially the same.
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