Abstract: An extremity dummy includes a first and a second dummy section which are connected in an articulated manner by a joint element having at least one axis of rotation and also includes a sensor by which the angular position or angular change of the connected dummy sections with respect to the axis of rotation to which the sensor is provided can be measured. Preferably, a respective sensor is provided to each of the axes of rotation of the joint element. A method for testing an orthosis using the extremity dummy is also provided.

Abstract: A lower platform and an upper platform are connected first and second levers having different lengths, each lever being articulated about a first axis on said lower platform and a second axis on said upper platform. The upper platform can be swiveled from a rest position to a position of maximum excursion relative to the lower platform so that the distance between platforms is immediately reduced upon swiveling from the rest position. At least one axis is provided with a brake which slows down rotational movement.

Abstract: An improvement in a pot mortar for electrically firing different types of ammunition charges said mortar having a mortar tube, the improvement residing in the mortar tube contains therewithin at least three electrical contacts for electrically contacting ammunition placed therein, one of which contacts is positioned to electrically fire a plurality of different types of ammunition, the other two of which are each positioned to electrically fire only one type of ammunition, each of said two electrical contacts positioned to fire a different type of ammunition.