Abstract: A rear sight, particularly for a pistol, comprises a sight plate carrier and a sight plate, which is mounted in the sight plate carrier and is vertically and laterally adjustable. To provide a rear sight which is structurally simple and has small dimensions, the sight plate carrier is nonadjustably secured to the firearm, particularly at its breech, and is formed with a groove, in which the sight plate is guided for vertical and lateral movements. Two transverse adjusting screws extend from the end faces of the sight plate carrier into the latter and are screwed into the sight plate and serve for a lateral adjustment thereof. A vertical adjusting screw is provided, which crosses the transverse adjusting screws at right angles thereto and is adapted to be screwed into the firearm, particularly at its breech, and has a head, which extends into a slotlike opening formed in the sight plate.

Abstract: This invention relates to a frame for two-wheeled vehicles, comprising two die-cast light metal semimonocoques adhesively joined at their adjoining edges which are longitudinally profiled. The edges are interengaged and semimonocoques are additionally held together by rivets, screws and/or pins inserted into abutting bosses integrally formed on the insides of the semimonocoques.

Abstract: A longitudinal housing wall for an internal combustion engine is formed with an elongate channel defined by two confronting parallel surfaces. A rod extends in said channel over at least two-thirds of the length of said channel and is coupled to said wall so as to be resiliently movable relative to said wall and capable of absorbing energy of flexural vibration at a predetermined frequency from said wall.

Abstract: A reciprocating internal combustion engine comprises an engine block, which includes cylinders, cylinder heads, pistons, connecting rods, a crankshaft and the mainshaft bearings for the crankshaft. That engine block is held in an outer pan by means of annular supporting elements, which are provided at both ends of the engine block and are coaxial to the crankshaft and insulate against a transmission of structure-borne noise. The engine block is sealed to the upper edge portion of the outer pan only by an oil seal. The outer pan consists of two parts, which are connected by screws. To prolong the service life of the annular supporting elements and to reduce the manufacturing costs, the outer pan has a parting plane which contains the axis of the crankshaft. The supporting elements are secured in the outer pan merely by being clamped between the two parts of the pan.

Abstract: Apparatus for measuring or monitoring the diameter of rod-shaped workpieces comprises two driven and interdigitating pinion rollers for rotating the workpiece about its longitudinal axis and at least one pair of mutually opposite measuring gages adapted to be urged against the workpiece and connected to an electronic evaluating device. To permit a rapid measurement of the workpieces which is independent of the attention and carefulness of an operator, the workpiece is fed via an inclined trough to the pinion rollers so that the workpiece engages an axial stop. The workpiece is then urged against the pinion rolls by a pressure-applying roller, which is radially movable into and out of engagement with the workpiece. By spring force and/or a pressure fluid the measuring gages are jointly moved into and out of engagement with the workpiece when the latter lies on the pinion rolls and is axially located by the axial stop.

Abstract: The two-wheeled vehicle comprises a frame having a steering head, a first frame member connected to and downwardly inclined from the steering head, and a second frame member which forms a junction with the lower end of the first frame member and extends upwardly from the junction. The frame has a downwardly facing seating surface at the junction. A structural unit is connected to the frame at the seating surface and comprises a rear fork. The seating surface extends only across the width of the frame at said junction. The frame is formed with blind bores in the seating surface. The structural unit is connected to the frame by screws and locating pins extending from below into the blind bores.

Abstract: The invention provides an improvement in an assembly comprising a frame for a motor vehicle, a pair of unsteered wheels disposed on opposite sides of the frame, and a spring suspension comprising a respective longitudinal control arm connected to each one of the wheels for constraining the wheel, each control arm having a hub, a respective bearing sleeve having one end secured to the frame and associated with a respective one of the control arms, the control arm hub being rotatably mounted in the associated bearing sleeve, the bearing sleeves having inner ends facing each other, a respective torsion bar associated with each wheel control arm for urging the control arm to a predetermined angular position about the axis of the associated bearing sleeve, the torsion bars having axes extending parallel to each other transversely to the direction of travel and the torsion bars being arranged one behind the other in this direction, and a respective anchor secured to the frame against rotation about the axis of an a

Abstract: A method of adjusting a plurality of fuel injection units associated with respective cylinders of a multi-cylinder diesel engine having a crankshaft operatively connected to all said cylinders is provided. Each of said fuel injection units comprises a fuel injection nozzle, a fuel injection pump connected to said nozzle and operable to discharge fuel therethrough, drive means for driving said pump, a housing accommodating said nozzle, said pump and said drive means, a capacity control element for controlling the capacity of said pump, and a timing control element for controlling the time at which said pump begins to discharge fuel through said nozzle.

Abstract: A lathe has two tool units for machining a workpiece from both end faces, and a workpiece-gripping drive stock disposed between the two tool units. A single chuck is supported on the drive stock and includes a series of radially displaceable gripping members and two coaxial rings rotatable relative to each other for actuating the gripping members, an outer one of the rings serving as a pulley for a driving belt whereby the outer ring is driven and each one of the two rings having an annular series of coupling teeth at one end face thereof. Two devices for respectively loading and unloading the workpiece each comprises a carrier carrying coupling teeth, the coupling teeth of the two coaxial chuck rings being movable into mesh with the coupling teeth of said devices, the coupling teeth carrier of only one of the devices being rotatable and a motor being connected to the rotatable carrier for rotating the carrier.

Abstract: A reciprocating internal combustion engine comprises an engine block, which includes the cylinders, cylinder heads, pistons, connecting rods, a crankshaft and main bearings for the crankshaft. The engine block is oiltightly mounted in an outer pan and is held in said outer pan by supporting elements which are provided at both end faces of the engine block and insulate against a transmission of structure-borne sound. The engine block is sealed at the top edge portion of the outer pan only by an oil seal. The supporting elements are coaxial to the crankshaft. To minimize the transmission of vibration to the supporting elements which insulate against the transmission of structure-borne sound, said supporting elements are connected to the engine block by holders, which extend below the cylinders and are secured to the engine block approximately in the middle of the region traversed by the piston heads between their top and bottom dead center positions.

Abstract: The engine block of a reciprocating internal combustion engine comprises cylinders, cylinder heads, pistons, connecting rods, a crankshaft, and bearings for said parts. The engine block is mounted in an outer pan in such a manner that the pan is insulated against a transmission of structure-borne sound from the engine block. A frame-shaped flexible seal is disposed between the engine block and the top edge portion of the outer pan and surrounds the engine block. The oil seal extends into grooves which are formed in the top edge portion of the outer pan and in the engine block. To ensure that the oil seal will produce a perfect sealing action in spite of relative motion of the engine block and outer pan and that the oil seal will not render the assembling and disassembling of the engine more difficult, the oil seal consists of fins, which are force-fitted in the grooves, and a thin flexible profiled connecting portion, which connects the fins.

Abstract: A fuel injection nozzle for air-compressing, self-igniting reciprocating internal combustion engines, particularly for such engines arranged for a direct injection of fuel, comprises an axially slidable and axially guided, spring-biased valve needle for closing the nozzle orifices in the nozzle tip. Fuel is supplied to an annular chamber through a transverse bore and an axial bore of the valve needle to a plenum chamber, which is defined by the valve seat cooperating with the valve needle. Between the plenum chamber and the means for guiding the valve needle, the outside peripheral surface of the latter is surrounded by a clearance space, which is adapted to be flushed with fuel.

Abstract: A fuel-injecting pump for diesel engines comprises pump cylinders, which are associated with respective engine cylinders and enclose a pump piston, which is adapted to be driven by a camshaft. The pump cylinders are provided with at least one radial fuel port, which at its opening into the pump cylinder is adapted to be closed and opened by the pump piston, which has two axially spaced apart valve edges. The opening of the fuel port into the pump cylinder has in that region which during the discharge stroke of the pump is first reached by the opening valve edge a substantially larger radius of curvature in the peripheral direction than in the adjacent lateral regions. Said opening and the opening valve edge have a common tangent at that point of the opening which is reached last by the opening valve edge during the discharge stroke of the pump.

Abstract: An engine block includes a crankshaft, and is enclosed by a sheath. Sealing elements connect the sheath to the engine block and insulate against structure-borne sound. A flywheel is non-rotatably connected to the crankshaft at one end of the engine block. A power train housing is disposed at that end of the engine block and includes a flywheel housing which accommodates the flywheel. The flywheel housing is rigid with the engine block and forms a unit therewith. The sheath encloses the engine block on all sides and defines an oil chamber around the engine block. The sealing elements consist of rings provided at opposite ends of the engine block. The unit is carried by and connected to a support by elastic elements which insulate against structure-borne sound.

Abstract: This invention relates to an internal combustion engine, particularly to a diesel engine. The engine comprises a crankshaft, which is connected to each of a plurality of pistons by a connecting rod and a piston pin. Each connecting rod has two bearings for the piston pin and a crankpin of the crankshaft, respectively. In order to provide a desired piston clearance between the piston at its top dead center and the bottom of the cylinder head, at least one of the bearings of the connecting rod is provided with an eccentric ring disposed between the receiving bore and the bearing bushing. During the assembling of the engine, the eccentric ring is rotated to such a position that the desired piston clearance is obtained. The bearing ring is then fixed in the resulting rotational position.

Abstract: The infinitely variable cone disk-wrapping vee belt drive comprises a pair of coaxial cone disks defining between them a vee-shaped groove and comprising an axially fixed, first cone disk and a second cone disk, which is axially displaceable relative to said first cone disk. A vee belt is trained around said first and second cone disks in said vee-shaped groove. First spring means urge said second cone disk axially toward said first cone disk. Locking means are provided, which are non-rotatably connected to one of said cone disks and movable to a locking position, in which said locking means hold said second cone disk against an axial displacement. Second spring means are provided, which urge said locking means to said locking position. Said locking means are arranged to unlock said second cone disk in response to a centrifugal force acting on said locking means and overcoming the force of said second spring means.

Abstract: A fork head for a motorcycle comprises an integral, pressure diecast body formed with two sockets for receiving respective fork blades, an upper and a lower cross-piece interconnecting the sockets, a centrally arranged bearing sleeve for receiving an upstanding pin carried by the frame of the motorcycle, lateral walls extending obliquely between the bearing sleeve and the sockets, and at least one bearing surface for conforming engagement by at least one accessory including a trim covering a front portion of the fork head above the bearing sleeve and the sockets.

Abstract: A reciprocating-piston drive mechanism comprises a reciprocating-piston assembly defining a spherical socket and including a piston body. A connecting rod is arranged for pivoting movement in a plane and has a ball head fitted in the spherical socket. A coupling between the ball head and the piston assembly is arranged to transform the pivoting movement of the connecting rod and ball head into a reciprocating rotation of the piston body about its axis. The coupling includes a first coupling member attached to, and non-rotatable relative to, the piston body, and a second coupling member attached to, and carried by, the ball head, the second coupling member engaging the first coupling member.

Abstract: A firing mechanism for a pistol comprises a firing pin, a hammer for striking on the firing pin, a hammer spring biasing the hammer, and a catch lever for temporarily locking the hammer in a cocked position is designed to have a safety function. In order to provide a structurally simple mechanism which provides perfect safety against an unintended discharge of a shot without need for additional parts, the catch lever is provided with two locking surfaces. When the hammer is uncocked, the firing pin bears on one of said locking surfaces in the firing direction and the hammer bears on the other of said locking surfaces in the striking sense.

Abstract: An inlet valve, an outlet valve and a pump cam are formed on a camshaft. The pump cam is disposed between and axially spaced from the inlet and outlet valve cams. An inlet valve tappet and an outlet valve tappet have end faces engaging said inlet and outlet valve cams, respectively. A cam follower is operable by the pump cam to control a fuel injection pump. A plane which is normal to the axis of said camshaft and defines the axial extent of said pump cam toward one of said tappets intersects said end face of said one tappet to define a line of intersection, whereby said pump has an overlapping portion, which axially overlaps said one tappet, and the axial projection of the periphery of said overlapping portion lies entirely within an envelope which is generated by said line of intersection around said pump cam as said camshaft is rotated.