Abstract: A sensor arrangement determines a condition and level of a liquid in a container. A first sensor has first electrodes forming a first measuring chamber communicating with the liquid and supplies a signal for determining an impedance of the first sensor and a condition of the liquid in the container. A second sensor has second electrodes forming a second measuring chamber communicating with the liquid via the first measuring chamber and supplies a signal for determining an impedance of the second sensor and a level of the liquid in the container. Electronic devices are coupled to the first and second sensors, and determine the impedance of the first and second sensors and the condition and level of the liquid in the container.

Abstract: A hand power tool has a machine housing, a drive motor accommodated in the machine housing, a drive train connected with the drive motor and provided with a tool receptacle for rotation of a tool insertable in the tool receptacle, a detecting device for detecting an uncontrolled operation of the hand power tool by detecting a blocking of the tool in a workpiece with a resulting impact-like turning of the machine housing, a blocking device provided for the drive train and releasable by the detecting device, the locking device having a locking toothing arranged in the drive train and a blocking member movably supported in the machine housing and form-lockingly engagable in the locking toothing so as to non-rotatably fix the drive train relative to the machine housing, the detecting device being formed so that it produces an electrical release signal in an uncontrolled operation, the blocking device being releasable by the electrical release signal, and further has electromagnet device actuatable by the release

Abstract: According to the invention, a suction lifter for a material handling device is provided for work pieces with suction surfaces. At least one pneumatic, double acting working cylinder is provided with a suction cup arranged at an end of the piston rod. A piston of the working cylinder is provided cooperating with the cylinder to define a first working chamber, opposite the suction cup, and a second working chamber, adjacent to the suction cup. A directional control is provided for controlling a connection between the compressed air source and the working cylinder and for venting the working cylinder. The directional control includes a pressure reducing arrangement for the suction cup.

Abstract: The invention relates to the connection of a hub with a hub disc for a clutch disc by a plastic deformation operation of the hub, the hub is formed of heat-treatable sintered steel.

Abstract: A forced-circulation steam generator with a combustion chamber (1) that has a cone (2), whereby the combustion chamber is demarcated by piping walls with at least partly slanting pipes, the cone is composed of piping walls (9, 10, 11, and 12) with upright pipes, and the pipes in the combustion chamber are separated from the pipes in the cone by headers. The two series of pipes are separated such that the medium flowing through the pipes in the combustion chamber has the same enthalpy.

Abstract: A bellows for protecting spindles, guideways, and the like of machine tools comprises a pleated cover having inner and outer cover elements and support members between adjacent pleats. The inner cover element has inwardly extending flaps which may be secured to the support members or to each other to form such support members.

Abstract: An adjustable rear view mirror for vehicles, such as cars. This mirror comprises a vacuum box having two plates which may be tilted with respect to one another. The mirror housing is attached to one of these plates and the mirror element which is wedge-shaped in cross section, is attached to the other plate. In order to adjust the mirror element, a vacuum is produced in the vacuum box which causes a tilting movement of the plate holding the mirror with respect to a restoring spring. For automatic control, a photocell may be provided which adjusts a control valve, of the vacuum system, upon the incidence of a certain minimum amount of light. However, a mechanically actuated directional control valve may also be used for the control.

Abstract: A method of measuring ion concentrations in solutions comprises using at least two ion sensitive test electrodes in the solution to be measured, the test electrodes having different sensitivities only in respect of the ion or ion mixture to be measured, setting the operating point of the test electrodes by means of at least one common reference electrode, and evaluating the signals of the test electrodes to produce a measurement result essentially independent of the properties of the reference and test electrodes which would interfere with accurate measurement.The invention also includes apparatus suitable for carrying out the method.

Abstract: The invention concerns a scraper device, as well as a tool for assembling such scraper device. The scraper device includes a scraper element and a support element, the scraper element having a groove permitting elastic deformation to establish a form-locking connection between the scraper element and the support element. The tool has a groove sloping toward guide surfaces and enables pressing of the scraper element into the support element by means of an area of pressure that expands in width.

Abstract: A stripping device having a plurality of abutting holder sections each of which carries a stripping lip. Abutting holder sections are joined to one another by a connecting element fitted into recesses and spanning the joint between adjacent sections. Abutting stripping lips are similarily joined to one another. Each holder section has a groove in one edge thereof in which the associated stripping lip is removably accommodated.

Abstract: A power supply chain having a pair of parallel chain strands spaced by connecting webs provided with cross arms and separators defining openings for the accommodation of power lines. The cross arms, the separators, or both are adjustable to enable the sizes of the openings to be varied to fit power lines of different diameters.

Abstract: Two flexible chains, each of which is composed of links connected by hinge pins, form the lateral sides of the cover. Each link of one chain is connected to an opposite link of the other chain, at least at the top, by a rigid cover member to form a cover section. The cover members of adjacent cover sections are in sliding contact, and at least one surface which participates in each such sliding contact is in the form of a sector of a cylinder whose axis is in alignment with the hinge pins connecting the links forming the sides of such adjacent cover sections. Adjacent cover sections also are provided with opposed stops which limit the angle of relative pivoting of such adjacent cover sections.