Abstract: A bipolar plate for an electrochemical system comprising a layer and an insert. The layer comprises a through-opening and a flow field with an electrochemically active area. The insert comprises a fluid guide structure having a plurality of protrusions arranged between the flow field and the through-opening, so that fluid is guided from the through-opening through the fluid guide structure between the protrusions to the flow field or vice versa. The fluid guide structure comprises a first and second region arranged next to each other in the fluid flow direction, wherein the protrusions in the first region and in the second region each have different distances from one another and/or are arranged at different densities and/or are shaped differently, so that a flow cross-section is smaller in the first region than in the second region and/or a flow resistance is greater in the first region than in the second region.

Abstract: The invention relates to a measuring device for the non-invasive determination of a blood sugar concentration in the body of a mammal, comprising a housing (G), a measuring electronics (IC) in the housing (G), wherein the measuring electronics (IC) further comprises at least one transmitter (Tx) for emitting high-frequency signals with a frequency of more than 0.1 THz and less than 10 THz, at least one receiver (Rx) for receiving high-frequency signals with a frequency of more than 0.

Abstract: A medical electrode device for implantation into a patient comprises a carrier element formed from an electrically insulating material, a contact element arranged on the carrier element and comprising a contact portion for coupling to tissue in an implanted state of the medical electrode device, and an electrical supply line connected to the contact element. The contact element comprises first and second fastening sections, the first and second fastening sections arranged at a distance with respect to each other along a length direction, and the electrical supply line connected to the contact element at the first fastening section and the second fastening section such that the electrical supply line is arranged at a distance with respect to the contact portion along a height direction oriented perpendicularly to the length direction. A portion of the carrier element extends through a space in between the contact portion and the electrical supply line.

Abstract: An electric cigarette (1) according to the invention comprises a cartridge unit (2) and a control unit (3) detachably arranged thereon, wherein the electric cigarette (1) terminates at a first end with a mouthpiece end (25) and at a second end with a charging tip (4).

Abstract: The invention relates to a process and an apparatus for cooling a flue gas stream from a reformer furnace of a steam reformer for steam reforming a hydrocarbon containing feed stream with a reforming steam stream to produce a crude synthesis gas stream. According to the invention, the flue gases are cooled by heat exchange with air in a combustion air preheater which comprises at least two separate heat exchange zones, and the temperature of the flue gas stream passing the separate heat exchange zones decreases stepwise in flow direction of the flue gas stream.

Abstract: A cartridge unit for an electrical cigarette is detachable from a control unit. The cartridge unit includes a reservoir housing and a control element body. The reservoir housing has disposed at a bottom thereof a mouthpiece closure having a mouthpiece opening that is fluidically connected to an aerosolization zone and an air duct element. The reservoir housing comprises an aerosol precursor compound supplied by a liquid transport element in the aerosolization zone to a heating element, wherein the heating element receives electrical energy via connecting lines. The reservoir housing has a cartridge closure at an end of the cartridge unit opposite the mouthpiece closure. The control element body is arranged in the cartridge closure, and has a number of electrical contacts to the control unit. The control element body is electrically connected at a bottom thereof to the connecting lines, and forms a snug fit with a body diameter.

Abstract: A filter arrangement (1) comprises a filter housing (2) with a housing base (3) and housing walls (4). A cover arrangement (6) closes the filter housing (2). Resonator inner conductors (8) extend from the housing base (3) to the cover arrangement (6) and end at a distance therefrom. Each of the first resonator inner conductors (8) comprises a first and a second end (8a, 8b). The first end (8a) is galvanically connected to the housing base (3). At least one insulator assembly (15) is arranged between the second end (8b) of the respective first resonator inner conductor (8) and the cover arrangement (3). The respective first resonator inner conductor (8) is variable in length and resilient along its longitudinal axis so that the second end (8b) can be moved towards and away from the first end (8a), thereby keeping the insulator assembly (15) pressed against the cover arrangement (6).

Abstract: A laser cutting method for cutting out a workpiece part from a metallic and plate-shaped workpiece includes cutting, using a laser beam and a cutting gas with predefined cutting parameters, the workpiece along a predefined cutting path, changing the cutting parameters in an end portion of the cutting path so that a material web remains between the workpiece part and a remaining workpiece of the workpiece. The material web fixes the workpiece part in the remaining workpiece. The method further includes cooling the workpiece in a region of the material web using the cutting gas and/or a cooling fluid, and cutting the workpiece part out of the remaining workpiece by separating the material web using the laser beam and the cutting gas.

Abstract: An electronic cigarette comprises along a central Z-axis from bottom to top a cartridge unit and a control unit detachably arranged thereon, wherein the electronic cigarette includes a control unit for control and a battery unit for electronic power supply the battery unit having a battery cell having a negative pole and a positive pole spaced apart therefrom by an insulator. A negative contact and a positive contact are arranged on the control unit such that they are connected to the corresponding negative pole and positive pole, respectively, of the battery cell. The control unit has a geometric spatial structure perpendicular to the central Z-axis with a diameter, with which diameter the control unit forms a snug fit in the electronic cigarette.

Abstract: A method for laser cutting a workpiece includes the steps of guiding a laser beam over the workpiece in a cutting direction so as to produce a cutting kerf with two cutting flanks and melting material on the workpiece at a cutting front that extends between the cutting flanks and adjoins at least one of the cutting flanks at an angle. The laser beam has a non-circular cross section and, at a front of the laser beam in the cutting direction, a continuous cutting beam contour corresponding to the cutting front.

Abstract: A product gas manifold system for a steam reformer is provided. The product gas manifold system includes a product gas manifold including an outer jacket tube and a gas-conveying inner tube extending concentrically and coaxially over its entire length, a space between the inner and jacket tubes being at least partially filled with a first insulating material, a plurality of nozzle tubes, each for connecting a reformer tube to the product gas manifold, a second insulating material disposed around the jacket tube, a curved outer surface outwardly limiting the second layer of the second insulating material and following the shape of the jacket tube in the axial direction.

Abstract: A conveying device with an electric drive, having a housing with a suction opening and a plurality of outlet openings that comprises a conveying element which is rotatably received in the housing to produce a fluid flow from the suction opening to the respective outlet opening, wherein the outlet openings are mounted to the housing at least axially spaced from each other.

Abstract: A method for cutting workpieces of different thicknesses includes providing at least one unprocessed laser beam, selectively forming a processing laser beam from the at least one unprocessed laser beam in accordance with a thickness of the workpiece, and cutting the workpiece with the processing laser beam. Forming the processing laser beam includes selectively coupling one or more unprocessed laser beams into one or more of a plurality of parallel, non-concentric fibers of a compound fiber, the plurality of fibers of the compound fiber having different cross-sectional shapes. A laser beam characteristic of the processing laser beam exiting the compound fiber differs depending upon which fibers of the compound fiber receive the at least one unprocessed laser beam, the laser beam characteristic of the processing laser beam differing depending on the thickness.

Abstract: A method for flame cutting of a workpiece, in particular a planar workpiece, with a thickness of at least 10 mm is performed by a laser beam with power of more than 10 kW and with oxygen as a cutting gas. Accordingly, a focal position in the beam direction of the laser beam is located within the workpiece at a depth that is greater than half the thickness of the workpiece. The laser beam emerges from a nozzle opening of a cutting gas nozzle together with the cutting gas, wherein a distance of a workpiece-side nozzle end face from the workpiece surface is at least 2 mm, preferably at least 3 mm, particularly preferably at least 5 mm.

Abstract: A conveying device with an electric drive, having a housing with a suction opening and a plurality of outlet openings that comprises a conveying element which is rotatably received in the housing to produce a fluid flow from the suction opening to the respective outlet opening, wherein the outlet openings are mounted to the housing at least axially spaced from each other.

Abstract: A system of product gas collecting conduits for a steam reformer, containing a plurality of reaction tubes within a reformer housing, for the production of synthesis gas, comprising: a) a product gas collecting conduit arranged outside the reformer housing of the steam reformer, b) several port tubes arranged along the length of the conduit for connecting one reaction tube each to the product gas collecting conduit, c) at least one windshield for the protection of the product gas collecting conduit against wind and draft.

Abstract: This disclosure relates to methods for cutting metal workpieces in sheet form with a thickness of at least 2 mm. A laser beam is positioned in a nozzle opening of a cutting gas nozzle configured to cut via the laser beam and a cutting gas so that a beam axis of the laser beam along a direction of propagation of the laser beam is at least a distance of 3 mm from a rear opening wall portion of the nozzle opening. Cutting gas configured for concurrently exiting the nozzle opening with the laser beam is emitted through the nozzle opening at a cutting gas pressure (p) of at most 10 bar.

Abstract: A laser cutting machine for cutting a workpiece having a first thickness (using a first processing laser beam having a first laser beam characteristic and a workpiece having a different second thickness using at least a second processing laser beam having a different second laser beam characteristic includes a laser source for producing a unprocessed laser beam having a laser wavelength of less than 4 ?m, a device which forms from the unprocessed laser beam the processing laser beams, and a control unit which controls the device in dependence on the thickness of the workpiece to be cut.

Abstract: A laser cutting machine for cutting a workpiece having a first thickness (using a first processing laser beam having a first laser beam characteristic and a workpiece having a different second thickness using at least a second processing laser beam having a different second laser beam characteristic includes a laser source for producing a unprocessed laser beam having a laser wavelength of less than 4 ?m, a device which forms from the unprocessed laser beam the processing laser beams, and a control unit which controls the device in dependence on the thickness of the workpiece to be cut.