Abstract: A measuring device for the measurement of differential signals including a real-time portion, which contains two probes, a signal adder and a triggering device. The probes each record a partial signal of a differential signal. The signal adder adds the partial signals to form a differential signal. The triggering device implements a triggering on the basis of the differential signal.

Abstract: An abrasive cut-off wheel with an abrasive cut-off ring (1), the abrasive body (10) of which comprises bound abrasive, wherein the abrasive cut-off ring (1) is fixed in the operating state by means of two circular clamping discs (2, 3) that can be clamped together in axial direction by means of central clamping flanges (4a, 4b) on the machine side, and at least one clamping disc (2) is connected in an anti-twist manner to the abrasive cut-off ring (1) by means of interacting projections (5, 6) and recesses (7, 8), and wherein the projections (5) and recesses (7) respectively arranged on the abrasive cut-off ring (1) are provided on a metal insert (9) of the abrasive cut-off ring (1), which projects beyond the abrasive body (10) in radial direction.

Abstract: The present invention is directed to an insertion tool (12) for a machine tool that has a hub (16) with at least one opening (42, 80) for insertion of a fastening means (40, 84), via which the hub (16) is clampable on a driving flange (22) of the machine tool connected to a drive shaft, the opening (42, 80) including a retaining region (54) and a releasing region (56), the releasing region (56) including a stop (66, 88) for limiting a release motion of the fastening means (40, 84). It is provided that the opening (42, 80) adjacent to the stop (66, 88) has a convex section (76, 90).

Abstract: The invention relates to a method for determining a gas concentration in a flowing gas mixture, wherein the flowing gas mixture includes solids having a defined size distribution, wherein by way of an optical spectrometer the concentration of a gas is measured in the flowing gas mixture, which includes a measurement beam of the optical spectrometer being conducted during the measurement through a measurement channel having walls made of a gas-permeable material. The invention also relates to a device for carrying out such a method.

Abstract: A method for digital triggering of a digital recording of a digitized measurement signal having a superimposed noise signal. The method includes generating from the digitized measurement signal a digital triggering signal for the digital triggering of the digital recording of the measurement signal, and performing band-limitation of the noise signal superimposed on the digitized measurement signal via a low-pass filtering before the digital triggering signal is generated. The bandwidth of the low-pass filtering is adjusted dependent upon edge steepness of the measurement signal, in order to reduce variance ?t2 in jitter of the digital triggering signal.

Abstract: The invention relates to a method for determining a gas concentration in a flowing gas mixture, wherein the flowing gas mixture includes solids having a defined size distribution, wherein by way of an optical spectrometer the concentration of a gas is measured in the flowing gas mixture, which includes a measurement beam of the optical spectrometer being conducted during the measurement through a measurement channel having walls made of a gas-permeable material. The invention also relates to a device for carrying out such a method.

Abstract: A measuring device for the measurement of differential signals including a real-time portion, which contains two probes, a signal adder and a triggering device. The probes each record a partial signal of a differential signal. The signal adder adds the partial signals to form a differential signal. The triggering device implements a triggering on the basis of the differential signal.

Abstract: There is disclosed a fuel cell assembly comprising at least one horizontally arranged fuel cell stack that has numerous fuel cells, each comprising an anode, a cathode and an electrolyte situated between the anode and the cathode; combustible gas supply means for supplying combustible gas to the anodes of the fuel cells; anode gas withdrawal means for withdrawing the anode exhaust gas from the anodes; cathode gas supply means for supplying cathode gas to the cathodes of the fuel cells; cathode gas withdrawal means for withdrawing the cathode exhaust gas from the fuel cells; and recirculation means for recirculating at least one part of the anode exhaust gas and/or the cathode exhaust gas to cathodes of the fuel cells.

Abstract: An approach is provided for digital triggering a recording of one or several signals sampled at individual sampling instants on a digital oscilloscope. The triggering is carried out when the interval between two recurrent triggering events is less or greater than a time threshold value.

Abstract: A torsionally rigid flexible shaft coupling, in particular, fully-steel shaft coupling, for transmitting torques between shafts, in particular shafts with axes which are offset relative to one another, having one or two plate packs (5) which are placed on flange sleeves (6) and on the latter, are clamped by means of a ring (4) against an end-side flange (65b) of the flange sleeve (6), wherein the plate packs are clamped in an alternating fashion in the peripheral direction to the sleeves (8) or second hubs (9), which face one another, by means of screws (7) which extend through the flange sleeves (6) and have nuts (2).

Abstract: There is disclosed a fuel cell assembly comprising: at least one horizontally arranged fuel cell stack that has numerous fuel cells, each comprising an anode, a cathode and an electrolyte situated between the anode and the cathode; combustible gas supply means for supplying combustible gas to the anodes of the fuel cells; anode gas withdrawal means for withdrawing the anode exhaust gas from the anodes; cathode gas supply means for supplying cathode gas to the cathodes of the fuel cells; cathode gas withdrawal means for withdrawing the cathode exhaust gas from the fuel cells; and recirculation means for recirculating at least one part of the anode exhaust gas and/or the cathode exhaust gas to cathodes of the fuel cells. The fuel cell assembly according to the invention is characterised in that the assembly consists of modular sub-assemblies that are independent of one another and that communicate with one another via standardised interfaces.

Abstract: There is disclosed a fuel cell assembly comprising at least one horizontally arranged fuel cell stack that has numerous fuel cells, each comprising an anode, a cathode and an electrolyte situated between the anode and the cathode; combustible gas supply means for supplying combustible gas to the anodes of the fuel cells; anode gas withdrawal means for withdrawing the anode exhaust gas from the anodes; cathode gas supply means for supplying cathode gas to the cathodes of the fuel cells; cathode gas withdrawal means for withdrawing the cathode exhaust gas from the fuel cells; and recirculation means for recirculating at least one part of the anode exhaust gas and/or the cathode exhaust gas to cathodes of the fuel cells.

Abstract: Device for humidifying and heating of the combustible gas being reformed for a fuel cell system, with a housing, traversed on a stipulated flow path by the combustible gas being humidified and heated, which has an inlet situated in an upper area and a more deeply positioned outlet for the combustible gas, and with a heat exchanger, which is arranged within housing and can be traversed from the bottom up in countercurrent to the combustible gas being humidified and heated by a heat transfer agent supplying the required heat, and with a device to supply water prescribed for humidified of the combustible gas.

Abstract: A method for producing a protein of interest on a manufacturing scale is based on integration, by homologous recombination, of the DNA encoding the protein of interest into a bacterial cell genome at a pre-selected site. The manufacturing scale production of recombinant proteins is in the fed-batch mode, semi-continuous or in a chemostat.

Abstract: An approach is provided for digital triggering a recording of one or more digitized signals on a digital oscilloscope by means of carrying out a level comparison for determining a triggering instant in each case between two successive sample values of a reference signal and a threshold values. According to the approach, at least one additional sample value of the reference signal is determined between two sequential samples of the reference signals by means of interpolation.

Abstract: A tool-holding device for an insert tool (14) equipped with an at least essentially disk-shaped hub (42), in particular for a hand-guided angle grinder (32) or a hand-guided circular saw, having a drive device (12) that includes a leaf spring unit (58) and is able to clamp the insert tool (14) in the axial direction (64). The leaf spring unit (58) has at least one freely extending spring piece (110) that extends at least partially in the circumference direction (50, 52).

Abstract: An insertion tool (12) for an angle grinder (2) that has a hub (16) with at least a first fastening means for fastening the hub (16) to a driving device (22) of the angle grinder (2). The first fastening means if located on a partial circle (54) with a radius (56) of between 12 mm and 25 mm.

Abstract: A device for parallel-serial conversion of several evaluation parameters determined respectively by a detector from detected signal values. The device includes a primary buffer memory for the synchronized buffering of each determined evaluation parameter, a synchronization unit for the generation of a synchronization signal for the synchronized buffering and a unit for the serial readout of the evaluation parameters stored in a synchronized manner in the primary buffer memory. A synchronization signal generated by the synchronization unit is derived from a release signal which provides the highest data rate of all the release signals associated respectively with the determined evaluation parameters.

Abstract: A method for digital triggering of a digital recording of a digitized measurement signal having a superimposed noise signal. The method includes generating from the digitized measurement signal a digital triggering signal for the digital triggering of the digital recording of the measurement signal, and performing band-limitation of the noise signal superimposed on the digitized measurement signal via a low-pass filtering before the digital triggering signal is generated. The bandwidth of the low-pass filtering is adjusted dependent upon edge steepness of the measurement signal, in order to reduce variance ?t2 in jitter of the digital triggering signal.

Abstract: Known household appliances for integrating into a sector of a worktop include an operating strip containing at least one operating element and having a supporting surface on the lower side thereof for supporting the household appliance on the worktop, and a housing part provided with a fixing flange to which the operating strip is fixed. The invention aims to produce the operating strip in a simple manner with high dimensional accuracy. To this end, the operating strip is produced primarily by forming or milling.