Abstract: An apparatus for the automatic separation along predetermined bending fracture lines in basic ceramic platelets of hybrid electronic circuits includes a support plate provided with grooves on its lower face defining bending lines juxtaposed with the fracture lines of the platelet urged against an upper face of plate by upper pressing members being in contact with each of single elements of the platelet defined by the fracture lines and lower retractable members controlled in a predetermined sequence for successive bending of the plate and the platelet subdivided in a plurality of single elements.

Abstract: An impact girder for a door or side wall of a passenger vehicle which has a hollow space extending along the length of a beam having compression and tension flanges. In the region between a central zone and the ends of the beam, the compression flange is formed with a pair of slots providing control deformation of the beam upon application of a force to the central region.

Abstract: The trench assembly comprises shoring plates supporting the side walls of the trench, vertical posts holding the shoring plates and at least one spindle or shore for the support of two oppositely located posts, the plates, include respective front sides pressed against the associated posts and curved in the vertical plane so that they can roll on the posts when the assembly is lowered.