High explosive shell for Schneider 75mm
field guns
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The
high explosive shell was composed by the body with
its cap screwed on the head, the bursting charge, the copper driving band and
the percussion fuze. The shell body. It was made
of steel, with thick base and thick walls. The inner chamber was cylindrical
in shape and extended up to the base, in order to assure the centring of the
bursting charge. It had a central cavity, where was screwed the primer box,
which plugged the shell and where was screwed the fuze with the booster. The
chamber was varnished up to the beginning of the
grooves and contained a smoke-producing charge pressed into the shell, in
order to leave enough room for the bursting charge. The bursting charge. It was composed by The driving band. See the
shrapnel. The percussion fuze. It was
composed by body (a), lead base plug (b), firing pin (c), safety spring (d),
retracting girdle (e), spiral spring (f), primer (g) with detonating composition
cup (h) and threatened cap (i). |
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The
body had a hollow containing the firing and the safety devices. The base plug
was intended to absorb as far as possible the blow transmitted by the firing
pin, when the gun was fired. The safety spring and the retracting girdle
prevented the fall of the firing pin before the shot. When the shell was
fired, the spiral spring hindered the fall of the firing pin on the
detonating composition cup, but when the shell hit the target, the firing pin
and the retracting girdle, having already compressed the little safety
spring, snap up by inertia and the needle penetrated into the cup, igniting
the powder stored inside. |
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H.E. shell |
charge |
