Abstract: The invention concerns a device for examining the precision of motion of a working spindle of an NC-controlled machine tool along a circular path for producing circular cylindrical surfaces on workpieces, comprising a first device part which can be coaxially mounted to the working spindle, a second device part which can be positioned on a machine table, which receives a workpiece to be processed, coaxially to the axis of a circular cylindrical surface to be produced on the workpiece, an electronic measuring value sensor which extends radially with respect to the axes of working spindle and circular cylindrical surface and is hinged to both device parts, and a shaft encoder which is rotatably disposed in the second device part coaxial relative to the axis of the circular cylindrical surface to be produced to determine the angular position of the measuring value sensor, wherein the measuring value sensor is held on one of the two device parts such that it can be adjusted and fixed transversely to the axes of th

Abstract: A method for operating an X-ray or neutron-optical system and beam stop comprising an X-ray or neutron source (1) from which corresponding radiation is guided as a primary beam (2) to a sample (4) under investigation, with an X-ray or neutron detector (6) for receiving radiation diffracted or scattered from the sample (4), wherein the source (1), the sample and the detector are disposed substantially on one line (=z-axis) and wherein a beam stop (5; 31; 41) is provided between the sample and the detector whose cross-sectional shape is adjusted to the cross-section of the primary beam is characterized in that the beam stop is disposed to be displaceable along the z-direction for optimum adjustment of the amounts of useful and interfering radiation impinging on the detector.

Abstract: The invention concerns vehicle headlights with two light functions, comprising a reflector (10) and a two-filament bulb (14), whose first spiral-wound filament (14?) generates a first light function and whose second spiral-wound filament (14?) generates a second light function, each light function being associated with a region (10?, 10?) of the reflector (10), wherein the second spiral-wound filament (14?) cooperates with a covering cap (18) which shields a portion of the light for the light function associated with this spiral-wound filament, which would otherwise impinge on the region (10?) of the reflector (10) which is associated with the first light function, wherein the second spiral-wound filament (14?) generates a turning and/or curve light and the regions (10?, 10?) of the reflector (10) are separated by a separating line (12) which extends in a segment of the reflector at an angle of between ±0 and 35°, in particular ±15 and 35°, with respect to the vertical line.

Abstract: A nuclear magnetic resonance apparatus for generating a homogeneous static magnetic field in the z-direction, comprising a coil/resonator system, a gradient system, and a shielding configuration which is positioned radially between the coil/resonator system and the gradient system, wherein the shielding configuration comprises an electrically conducting layer with a slot, wherein the electrically conducting layer is disposed about the center of the shielding configuration to be axially symmetrical with respect to the z-axis, is characterized in that, in an axial section z1<z<z2 with z2?z1>L, containing at least 90% of the magnetic field energy of the coil/resonator system, the shielding configuration comprises at least one pair of regions which have a cylinder envelope shape, wherein the regions of each pair are each defined by two respectively closed limiting lines circulating about the z-axis, and wherein the two limiting lines of each region have a mutual axial separation a ? z ? ? 2 -

Abstract: A magnetic resonance apparatus comprising a superconducting magnet coil which is disposed in a cryostat, and a refrigerator for cooling the magnet coil, which comprises a compressor for compressing a working gas, and a high-pressure line and a low-pressure line between the compressor and a control valve, which periodically connects the high-pressure line and the low-pressure line to a connecting line from the control valve to a cold head of the refrigerator, thereby generating pressure pulses via the connected working gas, wherein the control valve is mechanically rigidly connected to the cryostat, is characterized in that one pressure reservoir is provided in the high-pressure line and/or in the low pressure line, which is mechanically rigidly connected to the cryostat and which is connected to the compressor via a mechanically flexible line section.

Abstract: The invention relates to an interferometer, comprising at least a beam splitter (10), an end mirror (11) for returning beams (S2, S3), and a set of mirrors (12, 13, 14, 15) for reflecting the beams (S2, S3) between the beam splitter (10) and the end mirror (11), at least some of said mirrors (12, 13, 14, 15) being mounted on a rigid structure (17) which is arranged to be rotatable around an axis (A). Said set of mirrors comprises at least one pair of planar mirrors, constituted by two plane mirrors (12, 13), and two angular mirrors (14, 15), constituted by plane mirrors and arranged to deflect a course of the beam (S2, S3) hitting the angular mirror (14, 15) and to direct the beams (S2, S3), guided from the beam splitter (10) by way of at least one pair of plane mirrors (12, 13) to the angular mirrors (14, 15), to the end mirror (11) and back to the beam splitter (10).

Abstract: A method for obtaining NMR (=nuclear magnetic resonance) spectra of quadrupolar nuclei having spin I>½ using magic angle spinning (=MAS) in solid powders and transfer of coherences from a neighboring nucleus with spin S= 1/2 to single- or double-quantum transitions of quadrupolar nuclei having spin I>½, is characterized in that the transfer of coherences occurs through a combination of scalar and residual dipolar splittings. With the inventive method improved NMR-spectra can be obtained from which parameters can be extracted, which can be related to the structure and internal dynamics of solids containing the quadrupolar nuclei.

Abstract: The invention relates to a radar sensor (10) for use with automobiles. Said radar sensor emits pulsed radiation. The radar sensor is characterized in that it comprises an antenna with at least one layer-structured block (34) consisting of metal layers (36, 38, 40, 42) which are arranged according to the Yagi principle and which are respectively separated from each other by a dielectric intermediary layer (46, 48, 50). At least one of the metal layers (36, 38, 40, 42) is excited by a supply system (18) with a radar frequency.

Abstract: The invention relates to an electric driven tool device, especially an electric hand-held tool device, comprising an asynchronous electric motor (2) or a brush-less synchronous electric motor and a computer-controlled motor control device (8). The invention is characterized by a frequency converter (4) which can be controlled by the motor control device, whereby a motor (drive) voltage can be applied to the motor (2), and with a current detector (10) which co-operates with the motor control device (8) and detects the motor current. The motor control device (8) is embodied in such a manner that, in a first phase of the motor operation, the frequency of the motor current is maintained in a constant manner up to a limiting current I(grenz) and, in a second phase of the motor operation, at loads above the load at which the motor current reaches the limiting current I(grenz), the frequency of the motor current is lowered in such a manner that the motor current is maintained at a constant value.

Abstract: The invention relates to a big end bearing shell (4, 6) for a connecting rod (2), consisting of titanium or a titanium alloy. The shell comprises a support layer (8, 20) consisting of steel and an anti-friction layer (16, 26) for the crankshaft. According to the invention, the back of the support layer (8, 20) is clad with a layer (10, 22) of tin bronze material, with a thickness of 10-50 ?m to prevent fretting corrosion and frictional abrasion.

Abstract: A device for cutting free the colon of a slaughter animal has a cylindrical cutting knife and a guiding arbor with a suction channel. The device has two components, one of which is a tool and the other a robot connecting plate. The robot connecting plate has a connecting opening for vacuum, a connecting opening for water, a connecting opening for pressurized air to drive the pressurized air motor, and a connecting opening for exhaust air from the pressurized air motor. The connecting openings are connected to associated channels or passages in the tool in the assembled state of the tool and the robot connecting plate.

Abstract: An X-ray or neutron-optical analysis device comprising means for directing radiation from a source (1) onto a sample (2), and a detector (7) with n substantially identical detector elements (Di) which are disposed parallel, next to each other in a first direction x and which extend in strips in a second direction y, wherein i=1, . . .

Abstract: A friction bearing composite material comprises a metal base layer, a porous support layer applied thereto, and a low friction layer made from PTFE forming a bearing surface for a bearing partner. The low friction material forming the sliding surface also fills the pores in the support layer and comprises at least 60 vol. % PTFE and 10-25 vol. % zinc sulphide. In order to achieve a high wear resistance with a low coefficient of friction, the low friction material further comprises 1.5-3.5 vol. % carbon fibers and 1-7 vol. % PFA.

Abstract: A method for introducing a liquid sample into an NMR spectrometer to measure an NMR spectrum of the liquid sample, wherein the liquid sample is injected into a supply line and wherein further liquids are supplied into the supply line following the liquid sample, which are separated from each other and from the liquid sample by gas bubbles is characterized in that the liquid sample is supplied via an injection inlet to a valve configuration whose output side can be connected to the supply line and the further liquids and gas are supplied to the valve configuration via supply lines, wherein a desired sequence of sample segments, gas bubbles and further liquid segments is generated through temporally matched switching of the valve configuration in the supply line and is supplied to the NMR spectrometer. The inventive method realizes supply of a liquid sample into an NMR spectrometer with rapid sample transfer while thereby preventing mixing and dilution of the individual segments.

Abstract: The invention concerns an NMR apparatus (1) comprising an NMR spectrometer (2) for sequential investigation of several samples in sample containers (6) of substantially identical geometrical design, at a measuring position (10) in the NMR spectrometer (2) comprising a supply line (8) for pneumatic supply of the sample containers (6) from a magazine (3) to the measuring position (10). The apparatus is characterized in that the magazine (3) is disposed within a temperature-controlled cabinet, in particular, a cold chamber (4) and the supply line (8) can be heated. This substantially increases the throughput of samples of the NMR apparatus (1) with simple technical means.

Abstract: The invention relates to a digital burette having a manual drive for suctioning and applying an adjustable dose volume, a gear unit connected downstream and a digital display device controlled thereby for setting the dose volume. The control comprises an incremental encoder which is functionally connected to the gear unit, at least one sensor for detecting the signals produced by the incremental encoder and a processor connected to the sensor and the display device for calculating the dose volume corresponding to the number of signals. The incremental encoder is, in particular, a sector disc with two groups of sectors of different magnetic field strength disposed alternately in the peripheral direction of the sector disc. A sensor detects the number of turns of the sector disc.

Abstract: A method for manufacturing a reflector (5) for X-ray radiation (2, 3, 10, 11) which is curved in a non-circular arc shape, along a first cross-section (13) in a plane (XZ) which contains a x-direction, wherein the reflector (5) is also curved along a second cross-section (14) in a plane (YZ) which is perpendicular to the x-direction, is characterized in that the reflector (5) has a curvature along the second cross-section (14) which also differs from the shape of a circular arc. This makes the design of X-ray mirrors and the beam profile of reflected X-ray radiation more flexible, facilitates production of X-ray mirrors and at the same time provides high reflection capacity and good focusing properties for X-ray mirrors.