Werkzeugmaschinenfabrik Oerlikon-buhrle Ag

Heinz Maeder

Godwin Ettel

Robert Ramseyer

The apparatus for measuring the muzzle velocity V.sub.0 of a projectile fired from a weapon enables eliminating the effects of interfering magnetic fields, particularly that of the terrestrial magnetic field. For this purpose the apparatus comprises a shielding arrangement for shielding or screening interfering magnetic fields. Such measuring apparatus contains two induction coils and a support for the attachment thereof which is made of a material of low magnetic permeability. For shielding or screening the interfering magnetic fields there is used a shielding arrangement made of a material of high magnetic permeability. The apparatus is simultaneously constructed as a muzzle brake and is suitable for measuring the muzzle velocity of sabot projectiles.

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Pfaffhausen, Switzerland

Heinz Maeder