Abstract: A cutting device for producing a cutting jet from a shaped charge in a cavity of revolution comprising a body provided with a blind hole of revolution constituted from the bottom by a cylindrical-conical portion whose conical surface is defined by a conical liner surmounted by cylindrical portions of different diameters for supporting a member of revolution having two channels parallel to the axis of the blind hole. A tubular space is formed above the channels and the channels and the space between the member of revolution and the liner are filled with explosive, the tubular space being surmounted by a detonator. The plane of the two channels define the direction of the cutting jet.

Abstract: A pyrotechnic cutter for cutting an object such as a buoy-rope, tube, cable or the like and adapted to be mounted on a submarine vehicle, and including a fixed arm containing an explosive charge having a dihedral covering, and a second arm pivotally mounted to the fixed arm through a body portion which operatively engages an ejector which is adapted for engagement in the free end of a gun barrel, the ejector having an electrical circuit and a pyrotechnic circuit for ejecting the body having the arms, and detonating the explosive charge after a suitable time lag, so that explosion of the charge cuts the object.