Abstract: A longitudinally adjustable gas spring has a housing of which the edge on the side where the piston rod exits, projects freely. With the housing being moved as far as possible into an upright tube of a longitudinally adjustable column, the edge can at least in part overlap a damping member located on the piston rod, and with the housing being extracted as far as possible from the upright tube, it can serve additionally as a guidance in a guide bush of the upright tube.

Abstract: In a method and device for controlling an internal combustion engine, the fuel quantity injected into the combustion chambers of the internal combustion engine and/or the start of pump delivery are determined by means of a pressure sensor. In so doing, a duration-of-pump-delivery signal, which represents a measure for the injected fuel quantity, is predefined on the basis of a start-of-pump-delivery signal and an end-of-pump-delivery signal. The start-of-pump-delivery signal and/or the end-of-pump-delivery signal are recognized as being plausible when the duration-of-pump-delivery signal is greater than a first threshold value.

Abstract: A method for the production of spherical granulated materials from powdered solids and the granulated materials produced by it are disclosed. The method is characterized in that the powdered solids are moistened, possibly together with the usual binders, flow agents and plasticizers for the compression of solids, by the addition of a corresponding quantity of liquid and mixing smoothly in a mixer; they are then compressed with a ring collar mill into cylindrical agglomerate and then rounded in a rounding unit with wrinkle washer. The granulated solids thus produced have a very narrow particle size distribution and are distinguished by good flowability and good dispersability, depending on process controls.

Abstract: A cutterhead for a string trimmer having a rotatable drive shaft is adapted to hold and meter a cutting filament during operational use thereof. The cutterhead includes a disc-like carrier fixedly connected to one end of the drive shaft to permit the carrier to rotate about a rotational axis. The carrier has a peripheral edge and a peripherally extending outer wall approximately perpendicular to the carrier along the peripheral edge. The outer wall defines a space for accommodating the cutting filament in the cutterhead and has a guide eyelet disposed therein to define a pass-through opening for guiding the filament from the space to the outside of the cutterhead where a segment of the filament extends radially outwardly from the outer wall to define a cutting plane when the drive shaft rotates. The guide eyelet is made of wear-resistant material and is adapted to the diameter of the cutting filament.

Abstract: In the case of a longitudinally adjustable gas spring with two tubes enclosing each other concentrically and with a valve at one end and with a relief channel at the end where the piston rod exits the inner tube consists of plastics material. It has groove-like channels on its external wall which connect the relief channel with the valve. The webs between adjacent channels bear against the internal wall of the outer tube. The result is a cost-saving structure of the inner tube, which at the same time becomes very stable and is easy to manufacture.

Abstract: A gas spring has a housing closed at one end and a piston rod brought out of the other end of the housing. The housing is detachably mounted in a surrounding tube and is able to be pushed into the latter as far as an end position. Securing elements are mounted respectively at the outer end of the piston rod and on the surrounding tube. So as to ensure that a part supported by the gas spring is reliably held also when the housing is partly pulled out of the surrounding tube a locking element for the detachable locking of the housing with the surrounding tube is provided in an intermediate position in which the housing respective to the end position is partly pulled out of the surrounding tube.

Abstract: In a process for the peroxide-free grafting of ethylenically unsaturated carboxylic acids, carboxylic anhydrides and/or their derivatives to a homopolymer or copolymer of ethylene having a density equal to or greater than 0.930 g/cm.sup.3, the monomers to be grafted are used in a concentration of from 0.01 to 0.5% by weight and the grafting reaction is carried out at from 210.degree. to 300.degree. C. in a conventional extruder or mixer in the absence of a free radical initiator. The graft copolymers are used for the preparation of ionomers and adhesion promoters.

Abstract: In a process for the peroxide-free grafting of ethylenically unsaturated carboxylic acids, carboxylic anhydrides and/or their derivatives to a homopolymer or copolymer of ethylene having a density less than 0.930 g/cm.sup.3, the monomers to be grafted are used in a concentration of from 0.01 to 0.5% by weight and the grafting reaction is carried out at from 210.degree. to 300.degree. C. in a conventional extruder or mixer in the absence of a free radical initiator. The graft copolymers are used for the preparation of ionomers and adhesion promoters.

Abstract: A generator for cyclically moving jets comprises a housing including a chamber having a circular track therein, a body disposed in the chamber and rollable along the circular track, a hollow revolvable axle coupled to the body and extending to outside of the chamber and rotatably born in and sealed to the housing, a nozzle attached to the axle outside of the chamber for issuing at least one jet misalignedly in relation to the axis of rotation of the axle, and a fluid flow supply leading to an upstream region of the chamber. In operation, fluid flows past the body, through the hollow revolvable axle and issues from the nozzle as a jet. The body rolls along the circular track as a consequence of fluid-dynamic forces acting on the body. A fountain employs the generator for dynamic display of the cyclically moving jets issuing therefrom.

Abstract: The invention is directed to a positive-engaging coupling between a drive part and a driven part. The positive-engaging coupling includes an insert portion defining a first noncircular cross section and formed on the driven part. The drive part defines a receptacle for accommodating the insert portion therein and the receptacle has a second noncircular cross section corresponding to the first noncircular cross section. The insert portion and the receptacle conjointly define an intermediate space when the insert portion is inserted into the receptacle. An elastic insert is inserted into the receptacle for filling out the intermediate space when the insert portion of the driven part is disposed in the receptacle. If an overload occurs, the elastic insert is destroyed and the insert portion rotates freely within the receptacle.

Abstract: A longitudinally adjustable gas spring has a valve having a valve pin arranged to be moved within a valve body. On both sides of the inner chamber of the valve body annular seals are arranged and bear against the cylindrical sections of different diameters. To bridge at least one annular seal grooves are formed in an associated cylindrical section. When the corresponding annular seal is bridged by a displacement of the valve pin, the respective annular seal remains in its position bearing against the cylindrical external surface of the corresponding cylindrical section, so that the wear of the seals implying the gas spring to become unserviceable is eliminated.

Abstract: A spray-forming output device for fluidic oscillators to provide relatively wide-angle three-dimensional output spray patterns is connected to the output of a fluidic oscillator. The device comprises mutually counter-directed conduits whose entry regions are fed from the oscillator output and whose exit regions are connected to an interaction outlet region that includes a common outlet, the common outlet being directed substantially orthogonally with respect to the plane in which the counter-directed conduits are disposed. In one embodiment, the interaction outlet region includes an impact wall disposed at the exit regions of the counter-directed conduits proximally to the common outlet.

Abstract: A warming bowl for electrically heating lavage and irrigation liquid for use during medical-surgical procedures includes an electric heating device and an automatic thermostatic control to heat and maintain the liquid at a substantially constant temperature. The warming bowl is disposable after use and has an inner and an outer bowl sealed to one another so as to provide an internal sealed region therebetween for holding a battery to power the electric heating device. The inner bowl serves to hold irrigation liquid and supports therein a housing made of low-thermal-conductivity material that houses the electric heating device and the thermostatic control in spaced, substantially thermally isolated relation from one another. A metallic thermal shunt conductor is disposed along and in contact with a portion of the external periphery of the housing and extends over and across the space between the heating device and the thermostatic control.

Abstract: An apparatus for driving and controlling electrical loads, in particular glow plugs, is proposed which includes semiconductor switches which are assigned to the glow plugs and can be driven by a microprocessor, and also includes at least one measuring resistor and is characterized in that the microprocessor (17) is so designed that the glow plugs (RK) are switched on and/or off sequentially with time displacement for such a short time that a virtually continuous current rise or decrease is produced and/or in that, in order to detect an open circuit or a short circuit in any of the glow plugs (RK), the glow plugs (RK) are driven sequentially at any desired time interval for a very short time, preferably for 1 ms and the current flowing through the glow plugs (RK) is measured with the aid of the measuring resistor (R) and/or in that one or more glow plugs (RK) are driven simultaneously if a high-energy overvoltage occurs in the voltage supply of this apparatus.

Abstract: A longitudinally controllable adjustment device, in particular a gas spring partially filled with a fluid, has a piston disposed on a piston rod and a valve, inside of which a valve body is slidable in its longitudinal direction. It has a tapered section by which a seal, abutting on a sealing face, can be bridged. In order to make possible a long-stroke embodiment and a short-stroke embodiment, the seal has two sealing beads, of which the one sealing bead sealingly abuts in all embodiments against a truncated cone-like sealing face of the valve body, while the other sealing bead, if required, abuts on an optionally provided additional cylindrical sealing face between the truncated cone-like sealing face and the tapered section.

Abstract: A frictional damper, in particular for washing machines with spinning action, comprises a circular cylindrical housing and a tappet which is coaxially displaceable inside the housing and extends out of it with one end, the other end being provided with a friction piston. The friction piston has at least one friction coating made of an elastically resilient material and is provided with a grease chamber. In order to prevent a decrease of damping because of change from lubricated to dry friction, the grease storage chamber is provided within the friction piston and is connected with the at least one support segment by way of at least one grease channel.

Abstract: In a measurement device for contactless determination of the rotation angle and/or rotation speed, a disk is fastened on a shaft so as to be fixed with respect to rotation relative to it. During the measurement process, layers of material with good electrical conductivity which are arranged on one or both opposing sides of the disk are moved relative to receiver coils located on opposite sides of the disk (16a and 16b). The measurement device can work according to the eddy current measurement method, as well as according to the inductive method. In order to compensate for measurement errors, the conductive layers are arranged at approximately equal distances (a, b) between two coils. In addition, the greatest possible quantity of measurement points can be used for forming an average.

Abstract: A frictional vibration damper, in particular for washing machines with an oscillatory support of a washer unit has an approximately tube-shaped housing and a tappet displaceable in it. An articulation element is provided at the outer end of each the housing and the tappet. Further, a friction piston bearing with a friction coating on the internal wall of the housing is formed on the tappet, which friction piston is extendable by means of a linearly operating servomotor. In order to achieve high safety in operation at little expenditure, the servomotor is arranged in the tappet. It is formed by an electrically heatable thermoactuator element having a housing with a piston which changes its position relative to the housing upon heating. The piston of the servomotor directly bears against an expansion member serving to expand the friction piston.

Abstract: For the production of extrudates of ultra-high molecular weight polyethylene, finely divided polyethylene or polyethylene powder is introduced into the cooled feed zone of a single-screw extruder and compressed therein, melted in a transport zone of the extruder and discharge with shaping of the extrudate and cooling. The polyethylene is processed in the transport zone using a velocity gradient of from 50 to 1,000 sec.sup.-1 in the radial play between the screw and the extruder barrel, heated to 180.degree.-280.degree. C. and then transferred to a screw-free zone in which final shaping of the extrudate is effected.

Abstract: Cable insulation having high resistance to the formation or growth of water trees and high aging resistance consists of an ethylene polymer (I) and from 0.5 to 20% by weight of an ethylene polymer (II), which is an ethylene/C.sub.1 -C.sub.8 -alkyl-C.sub.3 -C.sub.6 -alkene carboxylate/C.sub.3 -C.sub.6 -alkenecarboxylic acid terpolymer.