Abstract: The casting chamber for a die casting machine includes a casting chamber jacket in which, over its entire length, there is provided an inner jacket defining the sliding surface for the pressure piston. In order for excessive heat in the inner jacket to be uniformly distributed and passed to the casting chamber jacket, copper rings are inserted in the inner jacket (3), the latter being pressed against the casting chamber jacket by means of screws threaded into a conical wedge. In this manner, heat distortion of the casting chamber can, for the first time, be held within limits, without requiring an oil or water cooling apparatus.

Abstract: A backup battery for buffering the operating voltage of a circuit arrangement is realized by a battery combined with an electrically irreversible element established by a melt fuse to form a unit. When the irreversible element exhibits its original condition when monitored, it is placed into the irreversible condition and the point in time is stored. As a result of the positive identification of the point in time of the initial commissioning of the backup battery, a premature replacement of the battery before expiration of the guaranteed service life that may appear necessary due to security considerations is avoidable. In a specific development, reaching the end of the service life of the backup battery is marked by the irreversible element.

Abstract: A clamping chuck comprising a shank which has two sleeve-like shank sections (5, 6), one of the sleeve-like sections (6) on an end side thereof being coordinated to a clamping section (1) for clamping into a drive member, and the other of the sleeve-like sections (5) on its end side being coordinated to a toolholder (2) for mounting a tool, in particular a screwdriver bit (18). The two sleeve-like shank sections (5, 6), by a torsion section (3) formed by a torsion member (7) coordinated to cavities of the shank sections, being twistable with respect to one another about a stop-limited angular distance (a-b), wherein the torsion section (3) is arranged between two hexagon sections of the torsion member (7), by which hexagon sections the torsion member is fitted without play into hexagon profile sections in the cavities (10, 11) of the sleeve-like shank sections (5, 6), and the torsion member continues, as one material integral piece into the clamping section formed as an insertion section (1).

Abstract: Method and articles for holding fluid conduits at a desired lateral distance from each other for connection to spaced-apart connection points, for example vehicle fuel line connections or domestic appliance flexible hoses. Preferred holding articles are described having heat-shrinkable rings connected by an integral connecting portion, or having a sheet with heat-shrinkable end portions (30) which can be wrapped around conduits (70) and a spacer (50) to hold the conduits at the required separation.