Abstract: A fuel injector for internal combustion engines. The fuel injector is of the pin type and is provided with a nozzle needle which is axially displaceably mounted in a nozzle body and is adapted to be lifted off its valve seat in response to fuel pressure. A throttling pin of the nozzle needle extends below the valve seat into a nozzle bore which is arranged coaxial to the longitudinal axis of the injector. The nozzle bore is provided with a gap eccentrically arranged at one point or over part of the periphery of the nozzle bore.

Abstract: Wrenching or torquing device for installing and tightening screws to a higher torque through a torque-type power wrench attached to the lower end of an extensible telescope strut. The strut travels along an overhead rail through the intermediary of a roller tram. The power wrench is attached to the telescope strut so that the reaction torque of the wrench is transmitted to the telescope strut in the form of an axial or transverse force.

Abstract: The invention relates to a cam for actuating the valves of a reciprocating machine, the cam causing the valve to be opened via a flat-faced sliding-contact cam follower against the force of a closing spring.

Abstract: A wind power plant comprising a tower carrying a power system including a power house and vanes rotatable by the wind. The tower has a lower natural frequency of vibration between the lower and higher critical frequencies of vibration of the power system, and the tower has a higher natural frequency of vibration above the higher critical frequency of vibration of the power system. A ring surrounds and is disconnectably attached to the tower, and guy wires extend from the ring to the ground. The power system is assembled on the ground and so that it surrounds the tower, and the power system is then elevated, together with the ring, along the tower. Elevation may be accomplished with cables and a winch. Alternatively, a thread-like ledge may surround the tower and the power house may carry means for engaging and moving along the ledge to elevate and lower the power house.

Abstract: Arrangement for the controllable operation of valves, including mechanically cooperating elements powered by external energy and acting on the valve. An electromagnetic control device produces a positive force interengagement of the mechanical elements so as to effect the actuation of the valve.

Abstract: A heat exchanger and process for constructing the heat exchanger with the heat exchanger including a plurality of tubes which are to be traversed by two fluid media to be heat exchanged with each other with each tube having a tube end for the entrance of the respective fluid medium and a tube end for the exit of the respective fluid medium. The tubes are juxtaposed so that at each end of the heat exchanger, the tube ends of the tubes to be traversed by one fluid medium project in an axial direction beyond the other tube ends of the remaining tubes located at this end of the heat exchanger. The tube ends of the tubes to be traversed by one of the fluid media which project beyond the other tube ends of the remaining tubes are combined into a bundle at each end of the heat exchanger.

Abstract: A fuel injector for internal combustion engines. The fuel injector comprises a nozzle needle which is axially displaceably arranged in a nozzle body and is adapted to be lifted off its conical valve seat in response to fuel pressure. A pin of the nozzle needle extends below the valve seat into a cavity provided in the nozzle body. In the nozzle body, below the cavity, there is provided a blind hole having a diameter smaller than that of the cavity. The pin extends into this blind hole when the fuel injector is closed or slightly opened, providing substantial sealing in a radial direction. At least one spray hole enters the blind hole eccentrically in such a way that a clearance is formed which communicates with the cavity.

Abstract: Method and device to prevent valve bridge cracks in the cylinder head of internal combustion engines. The cylinder head is exposed to compressive stresses acting radially inwards in the region between the valve seats and a surface facing the combustion chamber by a circular ring shrink fitted on the cylinder head in the region of the valve seats and concentrically to the axis of a cylinder.

Abstract: A process and apparatus for the separation of gas bubbles from a liquid which is subjected to a flow, in which a flowing portion of the liquid is brought into contact with an arcuate wall at an opening and deflected into a relatively quiescent liquid along a surface, so as to produce a vortex at the contact surface between the two liquid portions in such a manner as to project the vortex into the flowing portion as well as into the relatively quiescent portion, and whereby its axis extends in parallel or almost parallel to the contact surface, so that gas bubbles will be conducted from the flowing liquid portion by the vortex into the relatively quiescent liquid portion, from which the gas bubbles will then separate out under the influence of buoyant force.

Abstract: Supporting structure for reflectors consisting of interconnected supporting bars arranged in parallel spaced relationship, having the reflectors mounted thereon side by side in a single plane. The length of the bars is at a maximum the width of one reflector. At least two of these supporting bars are interconnected through transversely directed cross-members which, in turn, are fastened onto a central upright extending essentially parallel to the supporting bars.

Abstract: To permit reversal of sheets having extended length, a sheet storage or sheet transfer drum in engagement with a sheet reversal drum is formed with a sheet displacement apparatus located on the sheet storage drum rearwardly--with respect to the direction of rotation thereof--of the gripper means of the sheet storage drum and operable to lift a sheet off the circumference of the storage drum; the sheet displacement means preferably is a rail extending axially across the width of the storage drum which can swing from a circumferential position on the storage drum to an extended position, under control of a fixed cam thus, effectively, shortening the length of the overlap of a sheet on the storage drum on the circumference thereof and permitting handling of longer sheets thereby. The extension of the sheet displacement means is carried out at a position when the displacement means are out of engagement or interference with any adjacent cylinder.

Abstract: A system for articulated bogie-type rail vehicles in which the adjacent ends of the car bodies are pivotally and rotatably supported by supporting arms extending beyond their end trusses on a single-part connecting portal jointed by bellows to the car box ends and mounted on a transverse support. The portal is tightly enclosed by a sealing member on its full perimeter and has a spring mounted platform supported with vertical freedom of movement but with minimum play in all other directions on the bogie. This platform is pivotally arranged by at least one centrally located rotation ball race and by the supporting arms. This rotation ball race has three race rings and two rows of balls. Of these three race rings one race ring is kinematically associated with the front car body while another race ring is kinematically associated with the rear car body, and the third race ring is kinematically associated with the transverse support supporting the portal and the platform.

Abstract: To eliminate the need for braking sheets or webs being fed to a pleat-and-pinch folding apparatus, a pleating blade, suspended to fold sheets in the nip between folding rollers is arranged for reciprocating movement in the direction of feed of the sheets or web, conjointly with movement of the rollers so that the moving sheet is being creased and pushed into the nip between the rollers while it still has a longitudinal movement component, which is synchronized essentially with the axial movement of the rollers and the longitudinal movement of the pleating blade. The longitudinal movement of the sheet or web is stopped after the sheet has been gripped between the rollers and as it is being fed to a further transport arrangement, return movement of the rollers and the blade being effected between feeds of subsequent sheets. The axial movement of the roller and the longitudinal movement of the pleating blade can be controlled by cams, eccenters and the like.

Abstract: A reflector for solar collectors including a mirror-coated glass plate of which the plate thickness lies below the thickness required for a self-supporting glass plate, and in which the glass plate has the mirror-coated side thereof bonded to a support member, thus providing a high-quality, lightweight structure.

Abstract: A method and arrangement for the traversing of critical rotational speeds of elongate rotors. At least one critical frequency altering means in the form of springs, dampers and masses may be operatively connected, singly or in combination, to the rotor to thereby produce a change in the frequencies and/or amplitudes of the rotor, or in the critical rotational speeds and their amplitudes.

Abstract: An internal combustion engine having in the piston crown or cylinder head a combustion chamber in the shape of a body of revolution with a constricted throat. At the end of the compression stroke, the combustion chamber accommodates substantially all of the air for combustion which is imparted a rotation about the longitudinal axis of the combustion chamber.

Abstract: A plug connection for contact supports or contact holders which are constituted of an electrically insulating material, of which one is constructed hollow cylindrically-shaped and includes at least two longitudinal slots each provided with respectively one snap lock recess, and of which the second contact support is constructed so as to be guidedly insertable into the first one and which includes projections engaging into the longitudinal slots of the first contact support and which, in the final inserted position of the plug connection, lockingly engage into the associated snap lock recesses.

Abstract: Liquid natural gases are vaporized by directing them into heat exchange relationship with waste heat produced from a thermal power engine. In a closed turbine cycle system, vapor which is discharged from the turbine is passed through one or more heat exchangers and the natural gas is moved through the heat exchanger in heat exchange relationship with the vapor to effectively cool the vapor as well as to evaporate the natural gases which are supplied in a liquid form, for example.

Abstract: A controllable hydraulic valve mechanism for reciprocating engines or pumps including a drive piston, operable by a cam is provided with control edges and projects into a drive cylinder; a working piston which operates the valve directly and is guided in a working cylinder. The valve mechanism provides a continuous communication between the drive cylinder interior and a second reservoir which absorbs a substantial part of the energy produced by the lift of a cam. Control sleeves surround the drive piston and are operable by actuating means operable from outside the drive cylinder. Each of the control sleeves has a control ring groove which cooperates with control edges provided in the drive piston. A further sleeve in the working cylinder surrounds the working piston, is rotatable by actuating means operable from outside the working cylinder, and is provided with a control ring groove for varying the valve lift.

Abstract: To align sheets being fed to a printing machine without interruption of smooth flow of sheet feeding, the sheets are aligned while they are being fed from a stack to a set-up or alignment table 19 by imparting thereto a lateral force to direct the moving sheets towards a side or lateral stop. The vectorial lateral force component can be obtained by skewing transport belts 33 laterally, providing a transversely running belt 83 with freely movable engagement balls to press the sheets against the transversely moving belt, or tilting the transport table or conveyor system 17 and imparting vibration thereto so that the sheets will be jogged against a lateral stop 45, arriving properly longitudinally as well as laterally oriented at the set-up or alignment table for subsequent feeding into the printing machine. Preferably, the drive mechanism for the transport conveyor belts includes a variable speed transmission to selectively control overlap of subsequent sheets being fed.