Abstract: A device for electrically interconnecting two relatively rotating members, such as a vehicle steering wheel and steering column assembly, has a stationary housing portion carried with the steering column assembly and a moving housing portion carried with the steering wheel. A plurality of flexible, electrically conductive wires are spirally wound around the device between the two housing portions. Each conductive wire is guided in a direction-reversing loop formed therein. Each conductive wire is affixed at each of its two respective ends at electrical terminals.

Abstract: An electrical connecting device, in particular for arrangement between steering wheel and steering column switch module of a motor vehicle, comprises a stationary housing portion and a housing portion rotatable relative thereto, which in each case carry a terminal unit and surround at least one spirally wound flexible electrical wire which is in each case connected terminally to the terminal units and guided in a direction-changing loop within the housing. At least one additional, spirally wound, flexible electrical wire is provided, which is connected to the terminal units and which is guided in a direction-reversing loop within the housing.

Abstract: A detector for back-scattered electrons includes a scintillator crystal and a light-conducting device for directing away the secondary radiation to a receiver. The light-conducting device is placed against the scintillator crystal in such a way that the secondary radiation is directed away symmetrically to two lines of symmetry. The two lines of symmetry are located in the plane of the scintillator crystal and are at right angles to one another. In this way, a uniform illumination of the scanned image is obtained.

Abstract: The invention is directed to a method of preventing cathode damage when switching on an electron gun having a field emission cathode assembly including a cathode, a first electrode and a ground electrode. During normal operation of the electron gun, an extraction voltage is applied across the cathode and the first electrode and an accelerating voltage is applied across the cathode and the ground electrode. A direct galvanic connection is established between the cathode and the first electrode prior to normal operation of the electron gun. During a burn-in period, only the accelerating voltage is applied. This accelerating voltage may include an overvoltage of up to twenty percent. Then the galvanic connection between the cathode and the first electrode is interrupted and the extraction voltage is applied. An arrangement for carrying out the invention is also disclosed.

Abstract: Method of and apparatus for control of the heating capacity of a hydrodynamic brake which is associated with a liquid-cooled internal combustion engine, in the cooling medium circuit of which heat exchangers, a cooling medium circulating pump and the hydrodynamic brake acting as a heater are arranged. A regulation of the state of charge of the working chamber of the hydrodynamic brake occurs by a pressure regulator valve.In the case of a method and apparatus for controlling the heating capacity taking an available drive power into consideration, the pressure regulator valve which influences the heating capacity is controllable as a function of the load of the internal combustion engine.

Abstract: A fluid-friction clutch for a cooling fan of an internal combustion engine, the clutch being fitted on the water-pump shaft which drives the impeller of a water pump for the internal combustion engine and being controlled by an expansion-type thermostat element which is located in a longitudinal bore through the water-pump shaft. Cooling water of the internal combustion engine is applied directly to the expansion-type thermostat element, this water being continuously conveyed through the longitudinal bore in the water-pump shaft by utilizing the pressure-difference created in the cooling water by the impeller of the water pump. In order to cool both the working chamber of the fluid-friction clutch and the clutch-bearing, a cooling line is arranged inside the working chamber and connected to the cooling-water circulation inside the longitudinal bore through the water-pump shaft.

Abstract: A venting device for fuel tanks which includes equalizing chambers disposed immediately beneath a top wall and approximately centrally with respect to side walls of the fuel tank, with the equalizing chamber being vented to the atmosphere. Vent lines are disposed inside the fuel tank and are connected to the equalizing chamber. The vent lines terminate freely in an interior of a chamber vented to an interior of the fuel tank. The end of the vent lines terminate in vent openings located in an immediate vicinity of an end wall of the chamber which receives the vent line. A single opening is provided for venting each chamber, with the opening being disposed in a wall which is opposite to the chamber end wall receiving the vent line.

Abstract: Poly-.alpha.-olefins, particularly polyethylene, having a broad molecular weight distribution, can be prepared discontinuously or continuously in the gaseous phase or in hydrocarbons as dispersants, at a pressure of from 2 to 40 bar and at a temperature of from 60.degree. C. to 100.degree. C., optionally with the use of hydrogen as a molecular weight regulator in the presence of a catalyst solid which is manufactured in two reaction steps, from a primary solid containing magnesium and chlorine which has been reacted, in a reaction stage A, with peroxy compound(s) and with halogen-containing metal compounds of elements of IV and/or V sub-group(s) of the Mendeleev Periodic Table and, in reaction stage B, with halogen-containing metal compounds of elements of IV and/or V subgroup(s) of the Mendeleev Periodic Table, and/or metal organyl compounds of metals of the II and/or III main group(s) of the Mendeleev Periodic Table.

Abstract: Poly-.alpha.-olefins, particularly polyethylene, having a broad molecular-weight distribution, can be prepared in the presence of a catalyst solid which is manufactured in two reaction steps, from a primary solid containing magnesium and chlorine which has been reacted, in a reaction stage A, with secondary and/or tertiary alcohols and with halogen-containing metal compounds of elements of IV and/or V sub-group(s) of the Mendeleev Periodic Table, and, in a reaction stage B, with halogen-containing metal compounds of elements of IV and/or V sub-group(s) of the Mendeleev Periodic Table and metal organyl compounds of metals of the II and/or III main group(s) of the Mendeleev Periodic Table. The sequence of the reaction stages A and B is not critical for the success of the process according to the invention.

Abstract: Poly-.alpha.-olefins, particularly polyethylene, having a broad molecular-weight distribution, can be prepared in the presence of a catalyst solid which is manufactured in two reaction steps, from a primary solid containing magnesium and chlorine which has been reacted, in a reaction stage A, with alkoxy compounds of elements of Groups I to VI of the Mendeleev Periodic Table which contains at least one secondary or tertiary alkoxy group, and with halogen-containing metal compounds of elements of IV and/or V sub-group(s) of the Mendeleev Periodic Table and, in reaction stage B, with halogen-containing metal compounds of elements of IV and/or V sub-group(s) of the Mendeleev Periodic Table, and/or metal organyl compounds of metals of the II and/or III main group(s) of the Mendeleev Periodic Table. The sequence of the reaction stages A and B is not critical for the success of the process according to the invention.

Abstract: A venting device for fuel tanks of vehicles, especially motor vehicles, with an equalizing chamber to be placed in the fuel tank close to and beneath an upper wall at approximately centrally relative to side walls of the fuel tank. The equalizing chamber is vented to the atmosphere through an equalizing line and is connected to vent lines on both sides running on an inside of the fuel tank at approximately the same height. The vent lines terminate freely in a vicinity of each side wall with a vent opening at one end. The vent lines preferably terminate at the side wall line opposite to the connection of the vent lines with the equalizing chamber. Each vent line, at the ends containing the vent opening, has a chamber within the tank with the chamber being vented to the interior of the fuel tank and with the vent openings of the respective vent lines terminating in the chamber.

Abstract: A radiator mounting of a vehicle in which the radiator rests by means of at least one mounting support fixed at the radiator on a corresponding mounting support fixed at the vehicle and in which at least one hold-down member secured at a fixed part of the vehicle and cooperating with a corresponding counter-support member at the radiator prevents the lifting of the mounting support fixed at the radiator from its mounting support fixed at the vehicle; the tilting of the radiator about a reference axis in one circumferential direction is thereby counteracted by at least one abutment fixed at the vehicle and cooperating with a counter-abutment fixed at the radiator while a connecting element opposes the tilting of the radiator in the other circumferential direction; a center section of the connecting element thereby additionally cooperates with the counter-support member to perform itself the hold-down function.

Abstract: Improved catalyst and method for the manufacture of polyethylene comprising a catalyst based on a solid substance containing titanium, magnesium and chlorine activated by aluminum alkyls or reaction products of dialkyl aluminum hydrides with diolefins having from 4 to 20 carbon atoms, and its use in the manufacture of polyethylene where said solid substance is produced by (1) reacting metallic magnesium with at least 2 mols of allyl chloride and at least 1.75 mols of a di-lower alkyl ether, per gram-atom of magnesium at a temperature between about 30.degree. C and about 100.degree. C, (2) aging the solid reaction product for at least 10 hours at a temperature between about 30.degree. C and about 140.degree. C, (3) treating the solid reaction product either together, or subsequent to the aging step, with at least 0.2 mols of a di-lower alkyl sulfite, per gram-atom of magnesium, (4) reacting the aged and treated solid reaction product with at least 0.5 mols ofTiCl.sub.x (OR).sub.

Abstract: A catalyst for the preparation of low-pressure polyethylene comprising the reaction product, at a temperature of from 0.degree. to 100.degree. C, of(A) a reaction product of a dialkyl aluminum hydride with a polysiloxane having a viscosity of from 5 to 100 cSt (25.degree. C) and siloxane units having the formula ##EQU1## in a molar ratio of from 0.8 to 2 mols of said siloxane units per mol of said dialkyl aluminum hydride, withB. a compound of the formulaeTiX.sub.4.sub.-n (OR").sub.n , VX.sub.4.sub.-n (OR").sub.n, and VOX.sub.3.sub.-n (OR").sub.nWhere X is halogen, R" is an aliphatic hydrocarbon, and n is an integer from 0 to 2; as well as a method of producing low-pressure polyethylene utilizing said catalyst.

Abstract: Copolymers of vinyl chloride and 2-hydroxypropyl-alkyl maleate and/or fumarate consisting of a copolymer with from 65% to 95% by weight of vinyl chloride monomer units and from 5% to 35% by weight of 2-hydroxypropyl-alkyl maleate and/or fumarate monomer units, where alkyl has from 8 to 18 carbon atoms and is preferably branched, optionally with up to 15% of a dialkyl maleate and/or fumarate monomer units, where each alkyl has from 8 to 18 carbon atoms, said copolymer having a K-value of from 20 to 50 measured in cyclohexanone, as well as the method of producing the same by continuous addition of the monomer mix to an aqueous emulsion.

Abstract: Vinyl chloride terpolymers soluble in aromatic compounds with a K-value of from 25 to 38, measured in cyclohexanone consisting of an emulsion polymerized monomer mixture of from65% to 80% by weight of vinyl chloride,15% to 27% by weight of a diester of maleic acid and/or fumaric acid with multiple-branched alkanols having 9 to 15 carbon atoms, and3% to 15% by weight of a monoester of maleic acid and/or fumaric acid with multiple-branched alkanols having 9 to 15 carbon atoms;As well as the process of their preparation by pre-emulsification of the mono and di esters in the aqueous phase with an anionic emulsifier prior to polymerization with vinyl chloride.