Werkzeugmaschinenfabrik Oerlikon-buhrle Ag

Franz Moser

Walter Engel

Hugo Sigrist

Max Steinemann

The fragmentation jacket of a projectile or shell should be prefragmentized in the simplest possible manner by means of reference fracture locations provided at the inner side or interior surface of the fragmentation jacket. For this purpose, the reference fracture locations are impressed into a disk, for example, by stamping. Subsequently, the thus formed disk is shaped by deep drawing to form a fragmentation jacket such that the reference fracture locations formed by grooves are located at the inner side or interior surface of a cup-shaped fragmentation jacket. This cup-shaped fragmentation jacket is filled with an explosive charge which is detonated by a base fuze or by a tip or point fuze.

Method of producing a fragmentation jacket

When cartridges are introduced into a weapon there exists the danger that the conical shoulder of the cartridge case or sleeve will be deformed to an undesired degree. To avoid such disadvantage the wall of the conical shoulder is constructed to be thicker than the wall of the case or sleeve body of the cartridge case. For producing such a cartridge case an extruding mandrel is used which contains a recess at the region of the conical shoulder in order to generate a region of increased wall thickness in the wall of the cartridge case or sleeve.

Cartridge case and apparatus for producing the same

A dummy cartridge or ammunition is disclosed comprising a cartridge case containing a case floor portion, a substantially cylindrical case wall, a substantially conical shoulder portion and a mouth portion. A dummy body member or projectile is inserted into the cartridge case and bears against the case floor portion. Means serve for securing one end of the dummy body member to the floor portion of the cartridge case, whereas a further portion of the dummy body member is attached to the mouth portion of said cartridge case. The dummy body member possesses a substantially cylindrical hollow compartment having a forward portion. An adjustable trim body is inserted into the forward portion of the hollow compartment, in order to place the center of gravity of the dummy cartridge at a predetermined desired position.

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Fehraltdorf, Switzerland

Franz Moser