Abstract: A steering device which is configured as a steer-by-wire steering device includes a steering shaft disposed for rotation in a circumferential direction, a casing tube at least partially encompassing the steering shaft where the steering shaft is fixed in relation to the casing tube in an axial direction of the steering shaft, a sleeve encompassing the steering shaft, and a locking device. The steering shaft has an external thread which meshes with an internal thread of the sleeve. The sleeve is form-fitted into the casing tube such that the sleeve is displaceable in relation to the casing tube in the axial direction and is fixed in the circumferential direction. A lateral surface of the sleeve has a recess. The locking device and the recess are disposed such that the locking device is engageable into the recess in an axial position of the sleeve.

Abstract: A steering device which is configured as a steer-by-wire steering device includes a steering shaft disposed for rotation in a circumferential direction, a casing tube at least partially encompassing the steering shaft where the steering shaft is fixed in relation to the casing tube in an axial direction of the steering shaft, a sleeve encompassing the steering shaft, and a locking device. The steering shaft has an external thread which meshes with an internal thread of the sleeve. The sleeve is form-fitted into the casing tube such that the sleeve is displaceable in relation to the casing tube in the axial direction and is fixed in the circumferential direction. A lateral surface of the sleeve has a recess. The locking device and the recess are disposed such that the locking device is engageable into the recess in an axial position of the sleeve.

Abstract: The aim of the invention is to improve a generally known method for producing quartz glass doped with fluorine, wherein SiO2 particles are formed in the presence of fluorine by means of a plasma deposition process, deposited in layers on an outer envelope of a cylindrical quartz glass substrate body rotating about its longitudinal axis, and vitrified to form a layer of quartz glass with a fluorine content of at least 1.5 wt. %, in such a way that a quartz glass semifinished product with a high fluorine content, characterised by a high basic transmission in the UV wavelength range, is obtained. To this end, the substrate body has at least one reservoir layer of quartz glass at least in the region of the outer envelope thereof, having a minimum hydroxyl group content of 200 wt. ppm and/or a minimum hydrogen content of 1×1017 molecules/cm3, and the substrate body is either fully or partially removed following the deposition of the quartz glass layer doped with fluorine.

Abstract: A spindle drive for the height adjustment of an electrically adjustable steering column and the steering includes an adjustment spindle rotatably mounted in two bearings. The adjustment spindle includes two clamping elements, which have a centering cone on their sides facing one another, and the adjustment spindle is arranged in a tensioned manner on the two bearings by means of the clamping element, in that the clamping elements abut on the outer sides of the centering cones facing away from one other. The outer sides of the bearings are formed having a counter contour to the respectively abutting centering cone.

Abstract: A spindle drive for the height adjustment of an electrically adjustable steering column and the steering includes an adjustment spindle rotatably mounted in two bearings. The adjustment spindle includes two clamping elements, which have a centering cone on their sides facing one another, and the adjustment spindle is arranged in a tensioned manner on the two bearings by means of the clamping element, in that the clamping elements abut on the outer sides of the centering cones facing away from one other. The outer sides of the bearings are formed having a counter contour to the respectively abutting centering cone.

Abstract: A known refraction-sensitive optical fiber comprises a core zone with an index of refraction nK, a jacket zone surrounding the core zone, said jacket zone having an index of refraction nM, and an annular zone made of quartz glass doped with fluorine, said annular zone surrounding the jacket zone and having an index of refraction nF, where nF<nM<nK. With this as a starting point, an optical fiber is to be provided that is characterized by high refraction-sensitivity, good spliceability and compatibility, and a method is to be provided for cost-effective manufacture of such a fiber. With regard to the method, this object is accomplished according to the invention in that the quartz glass of the annular zone (21) is produced in a plasma deposition process on the outside in which an annular zonal layer made of the quartz glass doped with fluorine is produced on a substrate body (20), said layer having a layer thickness of at least 1 mm and an index of refraction nF<1.

Abstract: To improve a known method for making a quartz glass tube as a semifinished product for the manufacture of optical fibers, the tube comprising an inner fluorine-doped quartz glass layer and an outer quartz glass layer, so as to achieve inexpensive manufacture and improved dimensional stability of the quartz glass tube, it is suggested according to the invention that the quartz glass of the inner layer should be produced in a first plasma deposition process with formation of an inner layer having a wall thickness of at least 1.5 mm, with a fluorine content of at least 1.5% by wt. being set in the quartz glass, and that the quartz glass of the outer layer should be produced in a second plasma deposition process and deposited directly or indirectly on the inner layer with formation of a composite tube, and that the composite tube should be elongated into the quartz glass tube.

Abstract: Cylindrical optical components of quartz glass are known, which have an inner zone made of an inner zone glass, which extends in the direction of the longitudinal axis and is surrounded by a jacket zone made of a jacket zone glass, the average wall thickness thereof varying at least over a part of its length in the direction of the longitudinal axis of the component. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass.

Abstract: A steering column arrangement for motor vehicles with a vehicle-side console, on which an outer tube of a steering column carrying a steering shaft is attached in a releasable manner by means of a clamping device. The clamping device comprises at least one clamping wedge arrangement by which an increased holding force of the clamping device can be achieved during an axial displacement of the outer tube caused by an accident.

Abstract: Cylindrical optical components of quartz glass are known, which have an inner zone made of an inner zone glass, which extends in the direction of the longitudinal axis and is surrounded by a jacket zone made of a jacket zone glass, the average pt wall thickness thereof varying at least over a part of its length in the direction of the longitudinal axis of the component. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass.

Abstract: The aim of the invention is to improve a generally known method for producing quartz glass doped with fluorine, wherein SiO2 particles are formed in the presence of fluorine by means of a plasma deposition process, deposited in layers on an outer envelope of a cylindrical quartz glass substrate body rotating about its longitudinal axis, and vitrified to form a layer of quartz glass with a fluorine content of at least 1.5 wt. %, in such a way that a quartz glass semifinished product with a high fluorine content, characterised by a high basic transmission in the UV wavelength range, is obtained. To this end, the substrate body has at least one reservoir layer of quartz glass at least in the region of the outer envelope thereof, having a minimum hydroxyl group content of 200 wt. ppm and/or a minimum hydrogen content of 1×1017 molecules/cm3, and the substrate body is either fully or partially removed following the deposition of the quartz glass layer doped with fluorine.

Abstract: A known refraction-sensitive optical fiber comprises a core zone with an index of refraction nK, a jacket zone surrounding the core zone, said jacket zone having an index of refraction nM, and an annular zone made of quartz glass doped with fluorine, said annular zone surrounding the jacket zone and having an index of refraction NF, where nF<nM<nK. With this as a starting point, an optical fiber is to be provided that is characterized by high refraction-sensitivity, good spliceability and compatibility, and a method is to be provided for cost-effective manufacture of such a fiber. With regard to the method, this object is accomplished according to the invention in that the quartz glass of the annular zone (21) is produced in a plasma deposition process on the outside in which an annular zonal layer made of the quartz glass doped with fluorine is produced on a substrate body (20), said layer having a layer thickness of at least 1 mm and an index of refraction nF<1.

Abstract: A steering column arrangement for motor vehicles with a vehicle-side console, on which an outer tube of a steering column carrying a steering shaft is attached in a releasable manner by means of a clamping device. The clamping device comprises at least one clamping wedge arrangement by which an increased holding force of the clamping device can be achieved during an axial displacement of the outer tube caused by an accident.

Abstract: To improve a known method for making a quartz glass tube as a semifinished product for the manufacture of optical fibers, the tube comprising an inner fluorine-doped quartz glass layer and an outer quartz glass layer, so as to achieve inexpensive manufacture and improved dimensional stability of the quartz glass tube, it is suggested according to the invention that the quartz glass of the inner layer should be produced in a first plasma deposition process with formation of an inner layer having a wall thickness of at least 1.5 mm, with a fluorine content of at least 1.5% by wt. being set in the quartz glass, and that the quartz glass of the outer layer should be produced in a second plasma deposition process and deposited directly or indirectly on the inner layer with formation of a composite tube, and that the composite tube should be elongated into the quartz glass tube.

Abstract: To improve a generally known method for producing a tubular semifinished product from fluorine-doped quartz glass such that it is possible to produce a tubular semifinished product of fluorine-doped quartz glass with an inner bore of high quality while the efforts for making or treating the same are as small as possible, the present invention suggests a method comprising the following steps: (a) providing a substrate tube consisting of fluorine-doped quartz glass; (b) forming, in a deposition process, SiO2 particles by means of plasma burners and in the presence of fluorine, and depositing said particles in layers on the cylindrical outer surface of the substrate tube rotating about its longitudinal axis with formation of a mother tube consisting of fluorine-doped quartz glass; and (c) elongating the mother tube in an elongation process to obtain the tubular semifinished product.

Abstract: A method and a device are for detecting the initiation of the driving off process by a driver of a vehicle. The time derivatives of the engine torque and of the engine speed are determined, and the initiation of the driving off process is then inferred from an evaluation of these time derivative values. The detection of the driving off process can be used for releasing a brake while avoiding unintentional rolling of the vehicle when making a hill start.

Abstract: The invention relates to a method and a device for detecting the initiation of the driving off process by a driver of a vehicle. In this context, at least one variable (M, N) is determined and the initiation of the driving off process is then inferred from said variable (M, N). The engine torque (M) and/or the engine speed (N) and/or a variable ({dot over (M)}, {dot over (N)}) which is correlated with the at least one variable (M, N) to be evaluated is used as at least one measured variable. The detection of the driving off process can be used, for example, in methods and devices for avoiding unintentional rolling of the vehicle, in particular when making a hill start.

Abstract: The invention relates to a method and a device for actuating at least one wheel brake device of a vehicle for preventing inadvertent rolling. A driving off assistance mode with a predefined brake pressure reduction is activated in the at least one wheel brake device if the stationary state of the vehicle has been detected (50) and the vehicle is located (51) on an incline, when viewed in the longitudinal direction of the vehicle, and an uphill direction was detected (52) as the designated driving off direction of the vehicle. The brake pressure reduction can take place with a delay after the brake pedal has been released in such a way that the vehicle rolls back at a crawling speed.