Abstract: A bus driver for driving a differential data bus can be in a dominant data bus state and in a recessive data bus state. In the dominant data bus state, the bus driver connects the first and second single-wire data bus lines to a first and second electrical potential and temporarily does not drive the first and second single-wire data bus lines in the recessive data bus state. In the recessive data bus state after a change from the dominant data bus state to the recessive data bus state, bus driver connects the first and second single-wire data bus lines to a fourth electrical potential for an active time.

Abstract: A bus driver for driving a differential data bus can be in a dominant data bus state and in a recessive data bus state. In the dominant data bus state, the bus driver connects the first and second single-wire data bus lines to a first and second electrical potential and temporarily does not drive the first and second single-wire data bus lines in the recessive data bus state. In the recessive data bus state after a change from the dominant data bus state to the recessive data bus state, bus driver connects the first and second single-wire data bus lines to a fourth electrical potential for an active time.

Abstract: The invention relates to a foldable display device, consisting of several panels arranged in parallel to each other, which are movably connected with each other. In order to create a display device that may remain locally fixed, there is provided that the display device is not configured simply foldable but in addition is provided with a housing device, which may accommodate the display device in its folded condition.

Abstract: The invention relates to a foldable display device, consisting of several panels arranged in parallel to each other, which are movably connected with each other. In order to create a display device that may remain locally fixed, there is provided that the display device is not configured simply foldable but in addition is provided with a housing device, which may accommodate the display device in its folded condition.

Abstract: A generator unit for tractors (1) has a housing (4), which can be non-rotationally mounted on a component of the tractor (1). An input shaft is rotationally supported in the housing (4) and connectable to a power take-off shaft (2) of the tractor (1). An electrical generator (6) is coupled with the housing. The electrical generator (6) has a stator and a rotor, which is drive-wise connected to the input shaft and is driven by the same. The electrical generator (6) serves to driver electrical loads of the tractor 1 or of an agricultural device.

Abstract: A generator unit for tractors (1) has a housing (4), which can be non-rotationally mounted on a component of the tractor (1). An input shaft is rotationally supported in the housing (4) and connectable to a power take-off shaft (2) of the tractor (1). An electrical generator (6) is coupled with the housing. The electrical generator (6) has a stator and a rotor, which is drive-wise connected to the input shaft and is driven by the same. The electrical generator (6) serves to driver electrical loads of the tractor 1 or of an agricultural device.

Abstract: A device for measuring torque and the direction of rotation in a drive assembly, has a torsion element (9) which can be torque-loaded and rotatingly driven for the purpose of transmitting torque around an axis of rotation (8). A first transmitter element (16) attached in a rotationally fast way to the torsion element (9). The first transmitter element (16) is moved on a first rotational circle. A second transmitter element (34) is positioned at a reference distance from the first transmitter element 16. The second transmitter element (34) is connected in a rotationally fast way to the torsion element (9) and is moved on a second rotational circle. A sensor unit 35 is fixed and arranged at a distance from the axis of rotation (8). The sensor unit (35) senses the passage of the transmitter elements 16, 34 or of a reference edge or a reference surface and generates a corresponding sequence of signals.

Abstract: A device for measuring torque and the direction of rotation in a drive assembly, has a torsion element (9) which can be torque-loaded and rotatingly driven for the purpose of transmitting torque around an axis of rotation (8). A first transmitter element (16) attached in a rotationally fast way to the torsion element (9). The first transmitter element (16) is moved on a first rotational circle. A second transmitter element (34) is positioned at a reference distance from the first transmitter element 16. The second transmitter element (34) is connected in a rotationally fast way to the torsion element (9) and is moved on a second rotational circle. A sensor unit 35 is fixed and arranged at a distance from the axis of rotation (8). The sensor unit (35) senses the passage of the transmitter elements 16, 34 or of a reference edge or a reference surface and generates a corresponding sequence of signals.

Abstract: A device for setting the length of a top rink (7) of an attaching device of a tractor (1) has a piston/cylinder unit (14) for length setting purposes. The piston/cylinder (14) has a displacement sensor (20) which records the respective actual length setting of the top link (7). The displacement sensor (20) generates an actual proportional length signal. A lift position sensor (13) is provided which generates an electric signal representing the respective actual lift position of the lower steering arms (4). A nominal length setting of the top link (7), which refers to the respective actual lift position, can be stored in a storage unit (33). When a new actual lift position is reached during the automatic mode of operation, it is possible to generate an electric control signal which corresponds to the nominal length setting of the top link (7). The signal is transmitted to the comparator of a control unit (34). The comparator compares the control signal with the actual length signal.

Abstract: A device for setting the length of a top link (7) of an attaching device of a tractor (1) has a piston/cylinder unit (14) for length setting purposes. The piston/cylinder (14) has a displacement sensor (20) which records the respective actual length setting of the top link (7). The displacement sensor (20) generates an actual proportional length signal. A lift position sensor (13) is provided which generates an electric signal representing the respective actual lift position of the lower steering arms (4). A nominal length setting of the top link (7), which refers to the respective actual lift position, can be stored in a storage unit (33). When a new actual lift position is reached during the automatic mode of operation, it is possible to generate an electric control signal which corresponds to the nominal length setting of the top link (7). The signal is transmitted to the comparator of a control unit (34). The comparator compares the control signal with the actual length signal.

Abstract: A device for setting the length of a top link (7) of an attaching device of a tractor (1) has a piston/cylinder unit (14) for length setting purposes. The piston/cylinder (14) has a displacement sensor (20) which records the respective actual length setting of the top link (7). The displacement sensor (20) generates an actual proportional length signal. A lift position sensor (13) is provided which generates an electric signal representing the respective actual lift position of the lower steering arms (4). A nominal length setting of the top link (7), which refers to the respective actual lift position, can be stored in a storage unit (33). When a new actual lift position is reached during the automatic mode of operation, it is possible to generate an electric control signal which corresponds to the nominal length setting of the top link (7). The signal is transmitted to the comparator of a control unit (34). The comparator compares the control signal with the actual length signal.

Abstract: Fibers having a tenacity of more than 80 cn/tex and a filament linear density of more than 8 dtex which contain as the fiber-forming material an aromatic polyamide which is soluble in organic solvents and spinnable from isotropic spinning solutions. The fibers can be used for example as reinforcing materials, as heat-resistant insulator materials, for producing filter fabrics or as insulating materials.

Abstract: A process for producing fibers or films by the steps of:a) preparing an aromatic polyamide by polycondensation of dicarbonyl dihalides or mixtures thereof with at least two diamines in N-alkyllactams as a solvent, the polycondensation being of at least 90 mol %, based on the total amount of dicarbonyl dihalides in the reaction mixture, of compounds of the formula I or mixtures of such compoundsHal--OC--Ar.sup.1 --CO--Hal (I)with at least 90 mol%, based on the total amount of diamines in the reaction mixture, of compounds of the formula II and optionally III or mixtures of such compoundsH.sub.2 N--Ar.sup.2 --NH.sub.2 (II), H.sub.2 N--Ar.sup.3 --NH.sub.2 (III)where Ar.sup.1, Ar.sup.2 and Ar.sup.

Abstract: Aromatic copolyamides, production thereof, formed structures and production thereofDescribed are aromatic copolyamides comprising the structural repeat units of the formulae I, II and III ##STR1## where Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.

Abstract: Aromatic polyamide compositions with improved electrostatic properties, formed structures produced therefrom, and use and production thereof.Described are compositions comprising an aromatic polyamide which is soluble in organic solvents and from 0.01 to 30% by weight, based on the weight of the composition, of an organic or organometallic charge control agent.The compositions can be used for producing formed structures, in particular fibers; these fibers are preferably used for producing webs which can be used for producing dust filters.

Abstract: A process is described for preparing directly spinnable polymer solutions containing as fiber-forming substance polymers containing at least 95 mol %, based on the polymer, of the recurring structural unit of the formula I[--CO--R.sup.1 --CO--NH--R.sup.2 --NH--] (I)and up to 5 mol % of structural units as formed in the conversion/reaction of aromatic, aliphatic or cycloaliphatic dicarbonyl dichlorides and/or diamines. R.sup.1 and R.sup.2 are independently of each other 1,6-naphthylene, 1,7-naphthylene, 2,7-naphthylene, 3,4'-biphenyldiyl or 1,3-phenylene. The polymers prepared by reacting diamines of the formula (II) with dicarbonyl dichlorides of the formula (III) in solutionH.sub.2 N--R.sup.2 --NH.sub.2 (II)ClOC--R.sup.1 --COCl (III)The process contains the steps ofa) presenting the diamines as initial charge in the form of a solution in N-methylpyrrolidone,b) adding the dicarbonyl dichlorides to this solution,c) using starting monomers having a purity of greater than 99.

Abstract: Aromatic copolyamides are described which are soluble in organic polyamide solvents and which comprise the recurring structural units of the formulae Ia, Ib, Ic and Id[--OC--R.sup.1 --CO--NH--R.sup.2 --NH--] (Ia),[--OC--R.sup.1 --CO--NH--R.sup.3 --NH--] (Ib),[--OC--R.sup.1 --CO--NH--R.sup.4 --NH--] (Ic),[--OC--R.sup.1 --CO--NH--R.sup.5 --NH--] (Id)in whichR.sup.1 and R.sup.2 are mainly unsubstituted divalent aromatic radicals, the valency bonds of which are in the para-position or in a comparable coaxial or parallel position with respect to one another,R.sup.3 is a radical of the formula II ##STR1## R.sup.4 is a radical of the formula III--Ar.sup.1 --O--Ar.sup.1 --O--Ar.sup.1 -- (III), andR.sup.5 is a radical of the formula IV and/or V ##STR2## in which Ar.sup.1 has one of the meanings defined for R.sup.