Abstract: A process for producing an aluminum/magnesium alloy containing refractory material particles is described, wherein a particle-rich magnesium pre-alloy is first produced and from which the appropriate aluminum/magnesium alloy is then obtained by dissolution in aluminum.

Abstract: In an arrangement for the automatic shifting of an epicyclic speed change transmission, a relatively quickly performed smooth selection operation in starting is achieved by the speed change transmission taking the form of a group gear divided into two transmission sections. In a first selection phase, the one transmission section is stalled with uncoupling from the drive motor and the transmission section connected to the output shaft is held in the driveless state. On reaching the stalled state, the torque transmissibility between the drive motor and output shaft is restored with a smooth flat rise beginning from zero, by pressure control in the shift actuators concerned.

Abstract: An axially adjustable steering device for motor vehicles comprises two jacket-tube parts, of which the inner jacket-tube part is displaceable telescopically in the outer jacket-tube part by means of a controllable drive, a worm gear received in a reception part pivotably mounted fixedly relative to the vehicle acting on an axial tooth-profile part on the inner jacket-tube part in a longitudinally displacing manner. The reception part is retained via a locking mechanism in an engagement position of the worm gear and tooth-profile part, and this locking mechanism is releasable in a controlled manner during a front collision, after which the worm gear is pivoted out of engagement with the tooth-profile part and the inner jacket-tube part is moveable into a position shifted furthest in the forward direction.

Abstract: Device for determining the mass of a motor vehicle by determining the running resistance of the vehicle with the clutch in the drive train disengaged, and by repeatedly determining the torque of the engine and, at the same time, repeatedly measuring the vehicle acceleration with the clutch engaged and by taking into account the ratio of the transmission, an average value of the vehicle mass can be determined with a high degree of accuracy.

Abstract: A method and apparatus are proposed for sealing the gap between a rigid sliding roof and a fixed roof region of a motor car surrounding the same by means of a cavity seal element which is housed beneath the fixed roof region by a groove formed between the latter and a rail attached to the roof which exhibits mutually spaced perforations in its upper member. In order to obtain simply a predetermined groove height, a distance or spacing element, which faces the fixed roof region, and the foot part which is constructed as a clip, is let into at least two of the perforations.

Abstract: The invention relates to a rectangular key case having a swing-out flat key, so that the key can be integrated into the case in a space-saving manner. The case contains a key receiving space formed as a two-legged receiving shaft which, viewed over its length, is essentially L-shaped and extends with its longer leg along the side edge and with its shorter leg along the front edge of the key case housing. The flat key, in its non-working position, is lowered with its shank part entering into the longer leg and with its grip part entering into the shorter leg located near the corner of the key case housing. The shank part of the flat key is pivoted outside the housing and around its corner with the flat key in a working position pointed in the opposite direction from its non-working position and whereupon the grip part of the key engages into a longitudinal area of the shorter leg more remote from the corner.

Abstract: The trigger mechanism of a hand-held automatic firearm comprises a catch lever, which is pivoted on a transverse axis and is provided at its forward end with a pivoted catch pawl, which in a catching position engages a catching lug of a slider to arrest the slider as it moves forwardly from a rear position, to which the slider, which constitutes a part of a firing mechanism of the firearm, has moved against spring force when a round has been discharged. In order to provide such a firearm which has a trigger mechanism which is reliable in operation and can be made at low cost, the catch lever is adapted to be locked in its catching position against the force of a catch lever spring, the catch pawl is pivoted to the catch lever by means which permit a longitudinal movement of the catch pawl and the catch pawl is pivotally supported at its other end on an abutment, which is fixed to the receiver of the firearm.

Abstract: The invention relates to a sun visor for vehicles, having a sun visor body which can bend along its longitudinal extension and can be pivoted out of a rest position into a multiple number of use positions, and which can be held in these positions. In order to ensure that the sun visor body automatically bends in the course of the pivoting process on a bent shaft, the sun visor body is pivotably mounted on a curved through shaft. Between the rotatably mounted end regions of the curved shaft it is guided so as to be rotatable and slideable in the direction of a transverse extension of the sun visor body through an intermediate bearing engaging in bifurcated fashion around an associated longitudinal portion of the curved shaft. The sun visor body is guided so as to be longitudinally displaceable on the curved shaft to allow for correct positioning when the visor body and curved shaft are pivoted to be in front of a side window of a vehicle.

Abstract: In a drive slip control device for a road vehicle, which is provided with an anti-lock system operating on the pump-back principle and having a return pump of the anti-lock system associated with the brake circuit of the driven vehicle wheels used as the auxiliary pressure source for the drive slip control, for braking a vehicle wheel tending to spin. When the drive slip control is activated, the main brake pipe of the brake circuit of the driven vehicle wheels is shut off from the brake unit by means of a drive slip control valve. The return pump is activated and is shut off from the brake unit until the drive slip of one of the driven vehicle wheels exceeds a threshold value whose magnitude lies between the drive slip required value and threshold response value. The brake pressure control valves of the brake circuit of the driven vehicle wheels are driven into their closed position by means of this anticipatory activation of the return pump.

Abstract: An external door handle for a motor vehicle with a cleaning device for removing dirt and slush which accumulates on the handle when the vehicle is driven on slushy or muddy routes or when the vehicle is stationary.

Abstract: A bidirectional pressure supply system for consumers of pneumatic negative pressure and/or positive pressure has a negative pressure line system and a positive pressure line system, to which the respective pressure types are simultaneously admitted from a pressure generator. Upon the electrically triggerable operation of the generator the consumers are connected, via parallel connected directional valves assigned to the consumers, to the respective pressure line system depending on the pressure type required at that moment, individually or in groups. The system provides an arrangement to apply negative pressure to first consumers and, simultaneously, positive pressure to second consumers.

Abstract: The cooling air circulation system at the front end of a motor vehicle has several separate air ducts which are arranged one on top of the other and in which a water cooler and a supplementary cooler are position. Improved cooling is achieved by the cooling air of an upper and central air duct being conveyed to the water cooler, in front of which are mounted in the upper air duct only a condenser of an air-conditioning system and an electric fan, and by a lower air duct, in which the supplementary cooler is arranged, leading into an opening in front of the water cooler on the underside of the front end.

Abstract: In a fluid-friction clutch with a disc stack actuable by an adjusting piston and having resilient spacer parts, the viscous fluid escapes from the shearing gaps between adjacent discs of the stack into a compensating chamber located radially on the outside in relation to the disc stack, in order to ensure a completely torque-free lifting position of the clutch when the adjusting piston is not actuated.

Abstract: A locking device for a plug-in connection between a fluid pipe, provided with a shaped-on radially protruding abutment, and a connecting part utilizes a clamp, which can be guided in the connecting part, two branches of the clamp overlapping the abutment of a correctly plugged-in fluid pipe in order to secure the plug-in connection against axial separation. A guide slot, for receiving the clamp, opens along its length towards a plug-in side of the connecting part in order to prevent incorrectly produced plug-in connections, i.e. unsecured conditions, while the clamp itself is provided with a guard which can be displaced in the elongated opening of the guide slot. This guard ensures that the abutment of the plugged-in fluid pipe is either overlapped by the clamp branches, in the case of a correct plug-in connection, or remains visible above the plug-in side of the connecting part, in the case of an incorrectly executed plug-in connection.

Abstract: A V-type internal combustion engine having two overhead camshafts per cylinder bank is provided with an absolutely synchronous rotational-angle adjustment between two inlet camshafts and the engine crankshaft to minimize torque fluctuations in the cam drive. One of the two camshafts actuating the inlet valves of the internal combustion engines has a device for the rotational-angle adjustment of this camshaft relative to the crankshaft and the two camshafts actuating the inlet valves are coupled to one another via a timing chain or a toothed belt which is in operative connection between an output side of the rotational-angle adjusting device and the other camshaft actuating the inlet valves.

Abstract: The invention relates to marking of industrial products or individual parts thereof by burnt-in alphanumeric symbols and/or company symbols. To be able to apply in a space-saving and cost effective way a machine-readable, informationally identical additional coding, this additional coding is applied, integrated in the symbol, in such a way that distinctly deeper burnt-in locations, which are in themselves machine-detectable, are arranged along the trace of each and every symbol at several predetermined places distributed in a manner individual to the symbol. The deeper burnt-in locations may take the form of a blind hole, for example in the case of cast workpieces, or of a through-hole, for example in the case of sheet metal components. The additional coding can be applied in the same operation as the basic marking without noticeable time loss and without requiring additional space.

Abstract: For swivel-assistance to a roof-skin holding bow forming the lower end of a folding canopy, lateral limbs of the holding bow being affixed to associated canopy struts of a main hoop, there is provided a rod element, the length of which can be altered, which is articulated at both ends and is arranged in the side wall region of the folding canopy. Since on end of the rod element is connected to the facing lateral limb of the roof-skin holding bow and the second end of the rod element is connected in articulated fashion to the associated canopy strut, the rod element can be arranged in space-saving manner in the side board.

Abstract: The invention relates to a track-guidable omnibus, each of the lockable vehicle wheels of which is preceded by an associated transverse guide roller arranged near the ground, which is mounted in a rigid position relative to the wheel plane of the vehicle wheel by a bracket arm. An easily exchangeable change part, which contains a preferred breaking point, is interposed between the transverse guide roller and the end of the bracket arm in the end region of the bracket arm. This is intended to prevent secondary damage to the steering in the case of ground collisions. In order to prevent "derailment" from the track in case of a roller breakage during track-guided service of the vehicle, an emergency contact surface, which temporarily and provisionally assumes the function of the transverse guide roller when the latter is broken off, is provided protected between the transverse guide roller and the vehicle wheel. The emergency contact surface may be formed by a small skid or by a small emergency roller.

Abstract: A center console for motor vehicles includes storage compartment, a base body open in the upward direction and adapted to be covered by a pivotally connected cover member. An armrest is longitudinally displaceably supported on this cover member and can be transferred from a rearward pushed back position, located between the front vehicle seats, into a forward armrest position toward the instrument panel.

Abstract: A warning device for detecting mineral oil impurities in the brake fluid of hydraulic vehicle brake systems is described. The warning device comprises a body which is arranged in the brake fluid and can swell as a result of mineral oil and the change of shape of which indicates the presence of mineral oil impurities. The indication is given particularly as a result of the fact that the change in shape brought about by the swelling causes the opening or closing of an electrical circuit and thereby actuates a visual or acoustic indicator in the dashboard of the vehicle.