Abstract: The present invention relates to an installation for showing up faulty areas on the surface of a bar-shaped, magnetizable workpiece. The installation comprises a feed station and delivery station for the workpiece, and a treatment station, arranged between the feed station and the delivery station, for the introduction onto and fixing of a ferromagnetic powder on the workpiece. The installation includes a support having guide rails between and through the station, clamping devices displaceable along the support and for clamping the workpiece and connecting it to an electrical circuit each clamping device having a drive device with a drive cable. The drive devices are connected with each other by means of a clutch coupling; and, the installation has a control device for regulating operation of the whole installation.

Abstract: The invention relates to a shear for cutting-off sections of a profile material of the type having a stationary shear beam held in a housing and a movable shear beam which is arranged on a slide which is guided in the housing and can be displaced by means of a drive mechanism, each of the shear beams exhibiting at least one shear opening which is attached to the profile of the profile to be severed and with which are aligned inlet and outlet openings in the slide and housing for the profile material. Means in the housing define a recess in which is mounted the stationary shear beam and means in the slide define a recess in which is mounted the movable shear beam. The shear beams are arranged side by side in parallel and are removable from their respective recesses and, at least during severance of the profile material are biased by a biasing means together in a direction transverse to the direction of motion of the slide.