Abstract: A device is provided for the early detection of crack formations in work pieces or in components that are subjected to mechanical loading. Wherein in the region of at least one surface at risk of cracking there is arranged at least one testing chamber that is formed by a generative process of manufacturing the work piece or a portion of a work piece and to which a testing medium under pressure is admitted. Either a pressure sensor for determining a drop in pressure resulting from a crack formation of the work piece is connected to the testing chamber or a gas sensor that can also react to a testing medium escaping from the testing chamber in the event of crack formation is arranged in the vicinity of the testing chamber.

Abstract: A device is provided for the early detection of crack formations in work pieces or in components that are subjected to mechanical loading. Wherein in the region of at least one surface at risk of cracking there is arranged at least one testing chamber that is formed by a generative process of manufacturing the work piece or a portion of a work piece and to which a testing medium under pressure is admitted. Either a pressure sensor for determining a drop in pressure resulting from a crack formation of the work piece is connected to the testing chamber or a gas sensor that can also react to a testing medium escaping from the testing chamber in the event of crack formation is arranged in the vicinity of the testing chamber.

Abstract: A discharge booster for slow-flowing bulk material, which is to be unloaded from a container, whereby the container comprises a bottom, a discharge port at the bottom that may be sealed by a shutoff valve, a shaking device and a ventilation body. The ventilation body extends upwardly from the discharge port in the to at least the maximum dumping height in the container. The ventilation body is vibratable to beat open a passageway in the bulk material for venting a void above the bulk material in the container, to prevent the creation of a vacuum which could resist the discharge of the bulk material.