Abstract: An assembly rail has at least one profile element with support legs. A rail slot is defined between the support legs and extends in a longitudinal direction of the at least one profile element. The support legs are oriented inwardly toward an interior of the at least one profile element. A hollow profile that is larger than the at least one profile element has edge strips arranged along at least one longitudinal side of the hollow profile. Between the edge strips a receiving slot is formed. The at least one profile element is arranged in the receiving slot and is connected fixedly to the hollow profile. The rail slot of the at least one profile element opens outwardly.

Abstract: A hammer is provided which enables the orientation of a tool or bit mounted within a spindle of the hammer to be rotated to the required orientation. The hammer comprises a housing part having an aperture therein in which a spindle that is mounted so that the spindle extends out of the housing through the aperture. The spindle is capable of being rotated about its axis to any of a plurality of orientations, so as to alter the orientation of a tool or bit mounted therein. A locking ring is located around the spindle which locking ring can be moved axially along the spindle into and out of engagement with the housing part, so that when the locking ring engages the housing, it prevents the spindle from rotating with respect to the housing. A grip ring is located around the spindle and can be rotated about the axis of the spindle from a first position in which it prevents disengagement of the locking ring from the housing.

Abstract: A process in which by a bar code formed by bars are gaps located between them with different electromagnetic characteristics, an electromagnetic alternating field is produced and a measuring field variable by the bar code is detected. At lease one sensor is provided with a sensor core, an exciting coil subject to high frequency located thereon and in each case at least one sensor coil closely adjacent to the exciting coil. The bar code is formed by electrically conductive material bars placed on a carrier with gaps.