Abstract: A spark-ignited reciprocating-piston internal combustion engine is provided with a combustion chamber subdivided in the top dead center zone into two chambers. These two chambers are separated from one another by overlapping parts of the piston and cylinder and cylinder head when in the top dead center zone, such that when in this position a cross-connection between the chambers exist only at one position along the circumference of the piston. An ignition source is provided adjacent one circumferential end of a first of the chambers which forms a combustion duct between the ignition source and the cross connection. The ignition is controlled so as to take place only after the piston and cylinder are in respective positions separating the combustion chamber into the two chambers.

Abstract: A piston for internal combustion engines which is cooled by means of splash oil, and in which the piston interior space is closed off by a collecting trough arranged at the lower end of the piston and provided with an opening for the passage of the connecting rod.

Abstract: A guide installation for a belt-band adapted to be wound-on and wound-off a magazine roll of a safety belt system which is arranged within the area of an after-connected deflection fitting; the guide installation is claw-shaped and thereby surrounds the deflection web of the deflection fitting with a spacing for passage of the belt-band over a portion of the circumference of the deflection web, whereby the spacing is smaller than twice the thickness of the belt band; at least the inlet portion of the guide installation pointing in the direction toward the magazine roll also includes a section that extends essentially parallel to the extension direction of the associated belt-band.

Abstract: A reel mechanism for the elimination of the belt looseness of a safety belt system when exceeding a predetermined vehicle deceleration, whereby a preferably electrically ignitable propellant charge is provided for the initiation of the retraction movement, which is arranged in the axial direction of the wind-up roller; the propellant charge is thereby arranged concentrically in a hollow shaft of a belt roller that blocks automatically in case of danger, and accommodates a continuously effective retracting device as well as the wind-up roller; a liquid medium is disposed in front of the propellant charge which, after the ignition of the propellant charge, drives a rotor coupled at that instant with the wind-up roller by the then forming gases in the sense of an elimination of the belt looseness.

Abstract: Apparatus for preventing overspeeding of an engine is provided. In preferred embodiments, an hydraulically actuable clutch is controlled by a piston-cylinder arrangement connected to a driver operable clutch pedal. The rear side of the piston in this arrangement is selectively communicated with a high pressure air source and an exhaust space by means of a solenoid valve. The solenoid valve is controlled by a tachometer switch so that the same communicates the high pressure medium to automatically actuate the disengagement of the clutch whenever a predetermined set engine speed is exceeded. The pressure medium space at the side of the piston is also communicated with a further piston-cylinder arrangement for automatically forcing an engine accelerator pedal toward a no-load engine running condition at the same time the clutch is automatically disengaged. An emergency switch is provided for overriding the clutch disengaging apparatus so as to accommodate intentional usage of the engine as a brake.

Abstract: A vehicle bumper formed by a rearwardly opening U-shaped profile member having arranged therein reinforcements fashioned as vertically arranged ribs extending in the longitudinal direction of the vehicle. The ribs are formed of a metallic material and are individually secured with the bumper which is fashioned from sheet steel.

Abstract: A heating installation, especially for heating a passenger space in a motor vehicle, with at least one heat-exchanger that is adapted to be connected as a heat-absorbing heat-exchanger to a heat source, preferably to the exhaust gas pipe, and can be provided as a heat-emitting heat-exchanger at any desired place in the passenger space; the heat-exchanger is thereby accommodated in a housing and a medium is provided inside of this housing for the heat transfer which has a high heat-storage capacity and continues to transfer heat to the heat-conducting medium over long periods of time even after termination of the heat supply from the heat source or in case the heat source supplies relatively small quantities of heat.

Abstract: A radiator, especially for motor vehicles, which includes at the underside of its bottom at least one bearing support part for its vertical support and a drainage aperture in the bottom for the drainage of the cooling liquid; the drainage aperture thereby extends through the bearing support part.

Abstract: A mechanism accommodated in a hollow bearer of a vehicle for adjusting the height of an upper deflection fitting for the shoulder belt of a belt system, which includes a slide member steplessly displaceable in guidances of the vehicle hollow bearer; one hollow bearer wall is thereby provided with at least one row of teeth or recesses into which the coordinated teeth of a detent member connected with a deflecton fitting and guided in a recess of the slide member, engage against the action of at least one spring force retaining the detent member in its normal position during those occurring tensional belt forces which exceed the tensional forces acting on the belt by the belt user during normal driving operation; a gliding member is thereby arranged in the slide member so as to be displaceable in height, whereby the gliding member cooperates with the detent member and displaces the same up to its engagement at least approximately transversely to its direction of movement during correspondingly occurring tension

Abstract: A longitudinal bearer of a motor vehicle frame, constructed as hollow profile which is provided with places for the introduction of chassis forces into the frame and into the longitudinal bearer and which includes a longitudinal bearer section arranged outside of the introduction places and dissipating deformable impact energy; this longitudinal bearer section, by reason of a differing wall thickness progress, has a resistance to buckling that increases in the direction toward the vehicle center; to that end at least the longitudinal bearer section located outside of the force introduction places is longitudinally subdivided over its length at least into two bearer parts consisting of sheet-metal profile members which are connected with each other along longitudinal seams, whereby the sheet-metal members have different wall thickness while the longitudinal seams extend obliquely to the longitudinal axis of the longitudinal bearer section such that the sheet-metal bearer member with greater wall thickness has

Abstract: A process for the manufacture of electrodes suitable for electrolytic cells which comprises impregnating a porous matrix structure consisting of an electrode metal with an oxide or hydroxide of the metal by galvanic activation in a bath containing a salt of the metal, in neutral to acid solution, in which at least two porous metal matrix electrodes are placed into the bath and both are impregnated at the same time by applying one terminal of a direct voltage to each electrode and reversing the polarity of the direct voltage at a pulsating frequency. The invention is particularly applicable to the production of positive nickel electrodes.

Abstract: A wheel suspension with different swinging lengths in case of unidirectional and alternate spring movements and with a wheel spring system including for each wheel a spring and/or shock absorber as well as a wheel guide member which is pivotally connected on the body side thereof and which is loaded by the spring and/or shock absorber; the pivotal connection of the wheel guide member on the wheel side is thereby provided in the wheel center longitudinal plane and within a vertical plane extending transversely thereto and containing the point of contact of the wheel with the road.

Abstract: A ventilating system for vehicle bodies, especially of passenger motor vehicles, in which the rear column accommodates within its hollow space an air conduction and water discharge installation and which is provided with one or several air dishcarge openings within the area of the rear column; the air conduction and water discharge installation is thereby constructed trough-shaped and is formed out of a profiled partition wall that is supported at the narrow sides of the rear column and extends from the roof area to near the wheel casing; the air inlet takes place from the vehicle body behind the air discharge opening offset in the driving direction while the lower boundary of the air conduction and water discharge installation is formed by the lower edge of the lowermost air discharge opening.

Abstract: A check valve, especially for vacuum-operated installations in motor vehicles, which includes a two-partite housing and a roller diaphragm secured between the housing parts provided with inlet and outlet channels; the roller diaphragm which is pressed against its sealing seat by a prestressed spring, cooperates by means of its ring-shaped, curved diaphragm portion as movable sealing part with the bottom of one housing part constructed as sealing seat in such a manner that a central bore provided in the section of the roller diaphragm located on the side of the spring, connects the inlet channel terminating outside of the curved diaphragm portion with the outlet channel of the housing part, when the curved diaphragm portion lifts off from the sealing seat upon exceeding a predetermined differential pressure.

Abstract: An arrangement of an air compressor which includes at least one piston connected with a crankshaft, at a piston internal combustion engine, particularly at a truck engine, in which the crankshaft of the air compressor is supported in the control housing adjoining the output side of the engine whereby the air compressor cylinder or cylinders are mounted on the control housing.

Abstract: An understructure of a self-supporting motor vehicle body which includes two forward longitudinal bearers extending initially approximately parallel to the vehicle longitudinal direction at a distance from one another which are connected with the outside of the end wall continuing as main floor, extend at their vehicle inner ends outwardly in the direction toward two outer longitudinal bearers and are supported at the latter; the longitudinal bearer thereby forms a profile section of the outer longitudinal bearer within the connecting area of the longitudinal bearer and of the outer longitudinal bearer.

Abstract: An antenna adapted to be extended and retracted for car radio receivers, which is actuated by means of an on-off switch of the radio receiver and is driven by an electric motor reversible in its direction of rotation; the control circuit for the electric motor includes two limit switch contacts adapted to be opened by switching cams on a disk that moves proportional to the movement of the antenna, and a further switching contact which is adapted to be actuated by a further switching cam of the disk; the further switching contact is thereby opened at and above a predetermined extended length of the antenna while a manual switch with push-button function and possibly with detent function is provided for the further selective extension or retraction of the antenna.

Abstract: An Otto internal combustion engine with a high-pressure metering system and with evaporation of the fuel that is heated electrically and/or by means of exhaust gas heat, by way of at least one expansion nozzle; the fuel in the operating phase of the engine is thereby adapted to be heated by means of exhaust gas heat at most to a base temperature lying below the desired design temperature to which the fuel is intended to be heated, and is adapted to be electrically heated from the base temperature to the desired temperature.