摘要:
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.
摘要:
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. The transmitter elements generate signals of different lengths and, within the relevant measuring range, signal intervals of different lengths between the signals. An evaluation unit (36) receives the signals. The evaluation unit (36) determines the torque applied and the direction of rotation from the distance in terms of time between the signals.
摘要:
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. The control unit controls the piston/cylinder (14) as a function of the deviation of the signals from one another, towards a nominal length setting. In this way it is possible, automatically, to achieve optimum kinematics for an implement attached to a tractor, without any outside interference.
摘要:
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.3 are independently of each other a bivalent aromatic radical, the proportion of structural repeat units in the aromatic polyamide derived from the compounds of the formula II, based on the proportion of the structural repeat units derived from the compounds of the formulae II and III, being at least 50 mol %, and said aromatic polyamide is soluble in organic solvents,b) forcing the solution of the aromatic polyamide obtained in step a) through dies of the desired cross-sectional shape at temperatures from 40.degree. to 120.degree. C. to form fibers or films,c) removing the organic solvent in a conventional manner to produce solvent-leaner or -free fibers or films sufficiently mechanically stable and nontacky for further processing.The process of the invention omits the customary neutralization after the aromatic polyamide has been prepared.
摘要:
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.
摘要:
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.
摘要:
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. The control unit controls the piston/cylinder (14) as a function of the deviation of the signals from one another, towards a nominal length setting. In this way it is possible, automatically, to achieve optimum kinematics for an implement attached to a tractor, without any outside interference.
摘要:
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.4 are independently of one another bivalent aromatic radicals whose valence bonds are disposed para or comparably coaxial or parallel to each other,
摘要:
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.
摘要:
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 99.9% and a water content of less than 70 ppm, measured by the method of Karl Fischer,d) polycondensing at temperatures between -20.degree. and 100.degree. C. with forced circulation of the reaction solution,e) terminating the polycondensation at a certain inherent viscosity of the polymer of at least 1.5 dl/g, measured on a 0.5% strength polymer solution in concentrated H.sub.2 SO.sub.4 at 25.degree. C., by neutralizating of the reaction solution by addition of basic alkali metal and/or alkaline earth metal salts.