Abstract: The invention pertains to a special process and devices for the production preferably by machining of workpieces with non-circular outer and inner contours such as squares, hexagons, ellipses, polygons and the like, or eccentric circular bores and/or tappets. In the claimed process, the workpiece is rotated at constant angular velocity while a tool (e.g. the blade of a lathe tool) set eccentrically in relation to the workpieces if moved without rotating about is own axis at controllable speed in a circular path, workpiece and tool being moved towards one another in cycles with the appropriate advance. This ensures that apart from a small cuttings volume far each advance, very narrow tolerances can be set.

Abstract: Process for fabricating work-pieces with polygonal inner and/or outer profile, preferably by removal machining, wherein the work-piece pivots about a fixed axis (4) at constant speed while the tool (5) defines a closed loop path, wherein the rotation speed of the work piece and the rotation speed of the tool (5) on its path (6) are interdependent and wherein the tool (5) bites on the workpiece throughout its path, wherein the tool follows a closed path (6) differing from a circle and which is traversed by the tool (5) with a displacement speed varying in the course of one path by virtue of a predetermined displacement law, and wherein the path (6) is excentric with respect to the rotation axis (4) of the work piece and surrounds the latter.

Abstract: Method for producing workpieces having polygonal outer and/or inner contours, preferably by machining, wherein the workpiece to be machined rotates at a constant speed about a stationary axis, while the tool is guided on a closed, curved path, with the rate of rotation of the workpiece and the speed at which the tool revolves on its curved path being dependent upon one another and wherein further the tool engages at the workpiece during the entire revolution. The traveling speed of the tool during one revolution is varied according to a law of motion which is defined by the stationary rotation of the workpiece, the path of movement of the tool and the desired polygonal contour. The tool is guided, preferably translatorily, on a circularly cylindrical path.

Abstract: A releasable connector in leashes for domestic animals, safety lines or the like, comprising a coupling portion (12) provided with a spherical, drop-shaped or similarly shaped head member (14), and a holding portion (10) adapted to be coupled to the holding portion.In order to provide for easier handling and for improving the safeness against unintentional release of the connector, the holding portion (10) includes a lateral inlet (16) in the form of a guiding channel (24) extending approximately normal to the direction of pull (Z) and being slotted at least at the coupling portion side and conformed in configuration to the head member (14) of the coupling portion (12).A lock bolt (18) extends into the guiding channel (24), which lock bolt is adapted to be moved in a plane extending approximately in parallel with the direction of pull (Z).