Abstract: In an optical fiber (1) for the transmission of high-power laser radiation, with a fiber core (2), with an inner fiber cladding (3) surrounding the fiber core (2) for carrying the laser radiation in the fiber core (2), with a first outer fiber cladding (4) surrounding the inner fiber cladding (3), which has a smaller refractive index than the inner fiber cladding (3) as a result of longitudinally aligned air-filled capillaries (5), and with a second outer fiber cladding (6) surrounding the first outer fiber cladding (4), wherein the first outer fiber cladding (4) has a capillary-free longitudinal section (8), the second outer fiber cladding (6) has according to the invention scattering centers (7) at least in the region of the capillary-free longitudinal section (8) for scattering the laser radiation emerging from the inner fiber cladding (3) along the capillary-free longitudinal section (8).

Abstract: In an optical fibre (1) for the transmission of high-power laser radiation, with a fibre core (2), with an inner fibre cladding (3) surrounding the fibre core (2) for carrying the laser radiation in the fibre core (2), with a first outer fibre cladding (4) surrounding the inner fibre cladding (3), which has a smaller refractive index than the inner fibre cladding (3) as a result of longitudinally aligned air-filled capillaries (5), and with a second outer fibre cladding (6) surrounding the first outer fibre cladding (4), wherein the first outer fibre cladding (4) has a capillary-free longitudinal section (8), the second outer fibre cladding (6) has according to the invention scattering centres (7) at least in the region of the capillary-free longitudinal section (8) for scattering the laser radiation emerging from the inner fibre cladding (3) along the capillary-free longitudinal section (8).

Abstract: An optical fiber comprises a hollow fiber core, wherein the front faces of both fiber ends of the hollow fiber core are open and each fiber end is surrounded by a protection element in a dustproof fashion. The protection element includes a window at its front face in front of the fiber end to couple and decouple light to and from the hollow fiber core.

Abstract: A mobile phone comprises a communication device, a detection device, a position information reception device, a first computation device, and a second computation device.

Abstract: An optical fiber comprises a hollow fiber core, wherein the front faces of both fiber ends of the hollow fiber core are open and each fiber end is surrounded by a protection element in a dustproof fashion. The protection element includes a window at its front face in front of the fiber end to couple and decouple light to and from the hollow fiber core.

Abstract: A friction welding machine (1) has two headstocks (5, 6), two spindles (8, 9) with a spindle drive (12, 13) and a workpiece holder (22). The first headstock (5) is arranged stationarily at the frame (2). The second headstock (6) is mounted axially movably at the frame (2) and is connected to a feed drive (25). The spindles (8, 9) have different sizes, the second spindle (9) and its spindle drive (13) being designed to be smaller and weaker.

Abstract: In present-day laboratory work, the largest proportion of the time goes on operations at the laboratory balance. A laboratory balance (1) is therefore provided with an interface (19), with which the laboratory balance (1) can communicate with all the other devices customary in a laboratory. By means of the interface (19), command data as well as weighing-specific data can be transferred from the laboratory balance (1) to the other devices. The other devices can further process the weighing-specific data dependent on the command data, for instance. Furthermore, the other devices can transfer data reflecting the work results to the laboratory balance (1) by means of the interface. Furthermore, the other devices can also transfer control commands to the laboratory balance (1), which in the laboratory balance (1), depending on the evaluation of the weighing-specific data, release or block functions in the laboratory balance (1).

Abstract: To improve a diode laser device comprising at least one laser diode, a power supply for the laser diode, a cooling device including a heat sink with the laser diode disposed thereon, and a coolant supply allowing a coolant to flow through the heat sink, so that simple monitoring of its operation is possible without interfering with use of the diode laser device, it is proposed that an operation monitoring device be provided, and that the operation monitoring device detect a quantity representing the electric current flowing through the laser diode and a quantity representing the temperature of the coolant exiting from the heat sink and determine from these an operational quantity representing operation of the diode laser device.

Abstract: In a method for [For] acquisition of data for the preparation of laboratory samples, the weighing data are transferred from a balance to a computer unit. The weighing data are stored not only on a database, but rather a method-specific storage is done in which the actual weighing data are stored and are coordinated with the corresponding preparation method. Thus the computer unit can automatically derive further physical quantities that typically occur in a sample preparation from the actual weighing data, previous weighing data and with consideration of the actual and/or previous preparation method. Such quantities can be, for example, concentration, degree of moisture, etc.

Abstract: The underlying invention generally relates to the field of mobile computing, wireless communication, and interactive multimedia applications in mobile communication networks with high-speed access. Particularly, it refers to a customized multimedia information channel system presenting advertisement information (124a) and, if desired, other multimedia streams on a mobile communication and computing device (100) equipped with a Liquid Crystal Display (102) designed to meet modern business-to-business (B2B) requirements. In this connection, interactive operation is guaranteed by a digital wireless data and control link (108) between said mobile computing device (100) and a product (122) to be advertised.

Abstract: The invention relates to a blowing device (4) for a laser system (1) used for separating or welding workpieces (17). The blowing device (4) has at least one nozzle assembly (5), which generates a gas stream (7) that is oriented at an angle to the laser beam (3). The blowing device also has an air supply (8) which, on one side of the nozzle, leads into the proximity of the nozzle opening (6) and which is provided for an air supply stream (10) that is fed to the gas stream (7) in an essentially parallel manner or at an apex angle. A second air supply (9) is arranged on the other side of the nozzle. Said second air supply leads into the proximity of the nozzle opening (6) and is provided for a second air supply stream (11) that is fed to the gas steam (7) in an essentially parallel manner or at an apex angle. A protecting glass (13), which is oriented toward the gas stream (7) in an essentially parallel manner, can be alternatively or additionally placed in the proximity of the nozzle opening (6).

Abstract: To improve a diode laser device comprising at least one laser diode, a power supply for the laser diode, a cooling device including a heat sink with the laser diode disposed thereon, and a coolant supply allowing a coolant to flow through the heat sink, so that simple monitoring of its operation is possible without interfering with use of the diode laser device, it is proposed that an operation monitoring device be provided, and that the operation monitoring device detect a quantity representing the electric current flowing through the laser diode and a quantity representing the temperature of the coolant exiting from the heat sink and determine from these an operational quantity representing operation of the diode laser device.

Abstract: The invention relates to a blowing device (4) for a laser system (1) used for separating or welding workpieces (17). The blowing device (4) has at least one nozzle assembly (5), which generates a gas seam (7) that is oriented at an angle to the laser beam (3). The blowing device also has an air supply (8) which, on one side of the nozzle, leads into the proximity of the nozzle opening (6) and which is provided for an air supply stream (10) that is fed to the gas stream (7) in an essentially parallel manner or at an apex angle. A second air supply (9) is arranged on the other side of the nozzle. Said second air supply leads into the proximity of the nozzle opening (6) and is provided for a second air supply stream (11) that is fed to the gas steam (7) in an essentially parallel manner or at an apex angle. A protecting glass (13), which is oriented toward the gas stream (7) in an essentially parallel manner, can be alternatively or additionally placed in the proximity of the nozzle opening (6).

Abstract: Continuous process for the preparation of pentafluoroethyl iodide from iodine, iodine pentafluoride and tetrafluoroethylene, which comprises dissolving the iodine in iodine pentafluoride and continuously feeding the resulting solution to a vertical bubble column (1), which is filled with iodine pentafluoride and at its lower end has a feed line for tetrafluoroethylene, where the reaction zone is maintained at from 85 to 95° C., preferably 90° C., and the pentafluoroethyl iodide formed escapes in gaseous form at the top of the reactor (1), is liquefied in a downstream cooled condenser and is drawn off into storage vessels.

Abstract: Lead dioxide residues are advantageously removed from conducting surfaces by cathodic reduction. The surface thus cleaned can directly have a new lead dioxide layer applied by cathodic oxidation.

Abstract: A process for continuous telomerization is described, in which at least one telogenic compound and at least one taxogenic compound are reacted at from 40.degree. to 150.degree. C. under a pressure of from 0.1 to 3 MPa in the presence of at least one catalyst in an elongate cylindrical reaction space. After it has left the reaction space, the reaction mixture is separated, for example by distillation, the desired higher-molecular telomers are discharged as the bottom product, and the undesired low-molecular telomerization products are stripped off over the top, condensed and recycled into the process in a first circulation. In a second circulation, a part of the reaction mixture is taken off towards the end of the reaction space and reintroduced into the initial part of the reaction space. This allows an improved space-time yield and a better selection of defined product cuts.

Abstract: The foldable cantilever comprises a supporting arm formed by a U-profile. A supporting flap extends obliquely from the web of this profile section. The supporting arm is hingedly connected to a jib. A strut is, furthermore, also hingedly connected to the jib. The supporting arm, the jib and the strut are U-shaped profile sections. In use the U-profile which forms the strut supports itself on a supporting flap formed on the web of the profile section forming the supporting arm. A strut controlled slider is arranged in the supporting arm. The strut is connected by a tension spring to the jib. This tension spring leads to the lower edge of the strut being biased against or towards, respectively, the supporting arm. Accordingly, the foldable cantilever occupys in its shipping state only a small space and it is possible to open it to its operating position by means of only one manually made movement thereof.

Abstract: An adjusting mechanism for a regulating device comprises a housing which has an end wall that includes a keyshaped slot, a spring collar which is movably mounted in the housing to effect the adjustment in the regulating device, an elongated spindle which is connected at its lower end portion to the spring collar and extends through the slot in the housing end wall, and a handwheel connected to the upper end portion of the spindle located outside the housing. The elongated spindle includes a collar portion along its length and the key-shaped slot is configured to allow the lower end portion and collar portion to fit through the wider portion of the slot but be retained by the narrower portion.

Abstract: A plant for space heating and service-water heating, is comprised of a combination boiler and a heat pump. The boiler has a first water chamber adapted to be heated by a furnace and/or a heating insert, a second water chamber which communicates with the first chamber and which contains a heat-exchange surface for heating service water, and a third water chamber containing a heat-exchange surface (36, 36a, 38) for preheating cold service water. A circuit is connected to the third water chamber in the lowest water temperature zone, by means of which, when the heat pump is in operation, water can be fed to the condenser section of the heat pump and, after the water has heated up, be returned to the second water chamber. The third water chamber communicates at least with the second water chamber.