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MESSES. SCHNEIDER AND CO.’S WORKS.
which the projectile is set, and contains also obturating
bottoms. The following Table gives a general classification
of the cartridge cases :
Schneider-Canet Cartridge Cases.
Flat-bottomed Cases.
Complété case—
Case for permanent setting
of projectile.
Case for temporary setting
of projectile.
Case in which the projectile
is not set.
Obturating bottom.
Concave-bottomed Cases.
Complété case- -
Case for permanent setting of
projectile.
Case for temporary setting of
projectile.
Case in which the projectile is
not set.
Obturating bottom.
Ihe cases differ only in the shape given the bottom, ,
as shown in Figs. 1051 and 1052; the concave-bottomed
cases are styled safety cases, as the firing tube is J
within the surface plane formée! by the outside edge
of the base, and is not liable to be fired by shocks during
the charging operations of the gun.
The obturating bottoms are very short cases; tbey only
contain a small part of the charge, the remainder being
a combustible cartridge. They are used either for the sake
of economy, or for large calibre quick-firing guns, such
as the Schneider-Canet 20, 22, and 24-centimetre (7.874 in.,
8.661 in., and 9.449 in.) guns, for which a complété car-
tridge case would be too large and heavy to be handy
in service. The base of the obturating bottoms is made of
the same shape as that of the cartridge cases.
lig. 1053 shows the way in which the projectiles are
placed and set in the cartridge cases.
When the projectiles are not set in the cases, the latter
are closed tight with a disc, Fig. 1054, to hold the powder
charge, and to protect the lip of the case.