Abstract: An injection unit which is associated with a cylinder of a multicylinder diesel engine and comprises an injection nozzle and an injection piston pump which is disposed in a common housing and is driveable by a cam shaft. Said pump comprises a rotatable pump piston which is displaceable in a pump cylinder and has two control edges disposed axially spaced from each other for at least one fuel passage of the pump cylinder. To obtain the desired injection accuracy by accurately observing only a few dimensions during the production and without further tests, measuring and adjusting operations, the pump piston (3) and the pump cylinder (14) each comprise at least one stop face (24, 25) extending transversely preferably normal to the pump longitudinal axis. Said faces cooperate in the basic position of the pump piston (3) assumed in the installation of the unit in the engine directly or indirectly with simultaneous rotational position fixing of the pump piston (3).

Abstract: In an apparatus and a method for examining the authenticity of a document, which includes at least a machine-readable authenticity feature in the form of an optical microstructure for diffracting at least one component of a beam of light rays which has a wavelength of a first predetermined value and impinges on the microstructures along a predetermined direction, a light source for emitting the beam of light rays, and wherein the components of the light rays diffracted from the microstructure have an intensity distribution defining an effective center line of "gravity" along one direction of diffraction, a light-sensing device for sensing the light rays diffracted from the microstructure and for generating electrical signals from the sensed light rays, and an evaluator for processing the electrical signals generated by the light sensor, and for deriving from information contained in the processed electrical signals a YES/NO decision whether the document is authentic or not, there is provided a control connect

Abstract: A multipole key switch comprises switching chambers disposed next to each other are each provided with a movable contact bridge, which shortens a pair of contact fingers in each case in the turned on condition. Contact supports for supporting the contact bridges are formed at a cross-web of an actuating arm. Each switching chamber is provided with a restoring spring. The force of only two restoring springs can bring the key switch into its switched-off position. In order to prevent a sideways canting or clamping of the actuating ram, it is provided with two ribs, with the aid of which it is guided in a guide track.

Abstract: Apparatus for cutting of bags containing tricklable materials, as well as for separating the goods from bag parts, with a sieve drum and separate outlets for the bag parts, oversized particles, and the goods to be discharged, comprising a bag guidance with a floor inclined in dependence of the load, in a quasi-uniform, upper-and-lower engagement of the cutters to the bag, the cutters being coaxially and peripherally aligned with respect to one another, as well as for a uniform fragmentation and distribution of the goods to be discharged over the length of the sieve drum through accumulation rings.

Abstract: A reinforcement mat for reinforced concrete consists of longitudinal wires and crosswires which are welded together at their points of cross. End portions of the crosswires project out beyond the edge longitudinal wires and are bent back in the plane of the mat towards the edge longitudinal wires. The longitudinal wires are arranged symmetrically about the longitudinal centerline of the mat partly at wider and partly at narrower pitch. At each edge of the mat a family of at least two longitudinal wires are provided at the narrower pitch.

Abstract: A security blank is formed with a light-redirecting spatial structure including a deterministic component establishing at least one authenticating feature, and a stochastic component superimposed on the deterministic component, and sufficiently obscuring the deterministic component so as largely to frustrate recognition of the function of the authenticating feature by intensity measurement of light reflected therefrom. Recognition of the function of the authenticating feature is made possible by a method and an apparatus measuring the degree of coherence of two narrow bundles of light rays obtained from light reflected from the spatial structure upon its illumination by light of a selected wavelength.

Abstract: A rotational restriction lock is formed as a one-piece restricting element which is resiliently mounted on a rotor shaft and has a hub which is always resiliently driven in rotation by the rotor throughout a small angle, spring arms which transmit the rotary movement, and movable rotation restricting elements to which the rotary movement is transmitted and the ends of which prevent the rotor from rotation in an undesired direction, but allow the rotation of the rotor in a desired direction. Adjustable abutments are provided for selecting a permissible angle of rotation of the hub.

Abstract: A multispot grid-welding machine has an electrode-carrier beam movable up and down and a plurality of guide rods mounting a plurality of electrode units for movement on the beam. Pressure springs bias the electrode units in a direction towards the grid being welded, each electrode unit being movable into a working position and a rest position in which it is retracted. A plurality of return springs act on the electrode units, the return springs being considerably weaker than the pressure springs and acting to shift the respective electrode units on the working position into the retracted position. Devices are provided for advancing selected electrode units into the working position by overcoming the force of the return springs.

Abstract: A bending mechanism for wire or strip material is provided, which is intended in particular for bending back towards the edge longitudinal wires the projecting end portions of crosswires of reinforcement grids for reinforced concrete construction. The mechanism comprises a substantially circular-sectioned cylindrical bending form, and a bending-tool eccentrically mounted on a rotatable tool carrier which can be rotated in either direction about the axis of the bending-form. The bending-form is shiftable along said axis between a working position, in which the end faces of said tool carrier and said bending-form are substantially touching, and a rest position in which said two end faces define between them a gap for the passage of a wire which is to be bent, in particular a crosswire of a reinforcement grid.

Abstract: An agricultural machine to be pulled by a tractor and having working tools driven by outer driving sources comprises a chassis arranged to support the working tools, a beam unit arranged for connecting the chassis with a tractor and including a first beam and a second beam, a transmission including a first portion and a second portion turnable relative to one another and arranged so that the first portion is connected with the first beam turnable relative to one another about an upward axis of turning of the portions whereas the second portion is fixedly connected with the second beam, a locking element arranged to lock the rotation between the first portion and the first beam, and a driving device arranged in the transmission and including two input shafts located in the first portion and receiving the movement from one driving source, an output shaft located in the second portion and adapted to transmit movement to the working tools at approximately the same speed independently of the input shafts which rec

Abstract: A braking arrangement adapted for use in connection with a rollable cart employed in commercial airplanes includes a longitudinal base plate, which has relatively narrow end portions of a predetermined width, and two roller pairs mounted on the base plate. At least one brake mechanism is mounted on the base plate, and acts on a corresponding roller pair. The brake mechanism includes a brake rod in parallel with an axle of the roller pair, a mounting plate for the brake rod located between the rollers, which has a recess on its lower side, and a rotary disc mounted within the recess of the mounting plate, which, in turn, has a downwardly projecting portion provided with two entrainment lugs. A guide for the brake rod is mounted on the mounting plate for restraining lateral movement of the brake rod, while permitting a movement of it along a substantially vertical direction.

Abstract: In an apparatus for the measurement of electrical power, including a multiplier which receives on an input thereof an electrical signal proportional to the voltage component of the electrical power, and which is subjected to an external magnetic field proportional to the current component of the electrical power, an auxiliary magnetic field is applied to the multiplier. The multiplier is a Wheatstone bridge including four ferromagnetic and magnetoresistive thin films, and the magnetic fields have a direction along the direction of the hard magnetic axes of each of the thin films. The thin films are so positioned that the magnetization of two electrically oppositely disposed thin films resulting from the application of the external magnetic field thereto is rotated in a direction opposite to that of the correspondingly resulting magnetization of the remaining thin films, following application of the auxiliary magnetic field to the films.

Abstract: A current to pulse-sequence transducer for transforming a current to be measured into a sequence of pulses which has a certain mark-to-space ratio, includes a first transforming device for transforming the current to be measured into a measurement magnetic field, a second transforming device for generating a reference magnetic field, and magnetic field comparison device including a magnetoresistive thin film comparator normally providing a zero output when the fields are equal, but generating an impulse when the strength of one magnetic field exceeds that of the other, and an impulse processing device. The impulse processing device includes a differentiator amplifier connected to the output of the magnetoresistive thin film comparator and a Schmitt trigger circuit postcoupled to the differentiator amplifier.

Abstract: A hay harvesting machine for windrowing hay, moving swaths of hay, tedding hay and the like includes at least one drum which has a base and a wall, and is rotatable about an axis which is inclined within a predetermined range to the vertical, a flexible skirt which has substantially the shape of a truncated cone, and is connected to the base for sweeping up the hay, and a plurality of arms arranged in a plurality of rows along the wall, and which extend therefrom so as to cooperate with the skirt for further movement of the hay, and wherein at least the arms of the row nearest to the skirt extend in a direction substantially parallel with an upper surface of the skirt.

Abstract: In an apparatus for synchronizing received binary signals, the duration of each bit of the received signals to be synchronized is an integral multiple n of the duration of an original bit, and each original bit has a reception quality factor which is stored in time succession, in respect of the individual original bits, in a common quality factor memory. Quality factor differences of successive original bits are formed by means of a differencing means, and the quality factor differences of those original bits which have the same serial number within a reception bit are added by means of adding circuit. The maximum of the summed quality factor differences of n successive original bits is determined by means of a maximum decision circuit. The addresses of the original bits are continuously adapted in such a way that that of the original bit having the maximum summed quality factor difference receives a given, constant and predetermined value.

Abstract: A synchronizable heart pacemaker includes a timing circuit, a differentiating circuit for receiving signals, and an interference recognition circuit connected to the output of the differentiating circuit. The interference recognition circuit includes a testing stage for each signal. An output signal normally appears on an output of the testing stage, and the testing stage includes a peak detector circuit which stores a positive maximum value and a negative maximum value of each signal differentiated by the differentiating stage, and an adder forming the sum of said maximum values. A discriminator stage is postcoupled to the testing stage.

Abstract: A press for extracting fluid from fluid-containing matter so as to separate the fluid from the remaining matter, particularly for dejuicing of agricultural products, primarily fruit, includes a rotatably supported container, and at least one flexible membrane which can be actuated by exerting pressure thereon. The membrane is disposed in the container, and subdivides the container so as to define a pressure chamber and a press space therein. At least one wall surrounds the press space, and the pressure chamber has an inlet conduit and an outlet conduit for a pressure medium. Flexible drainage devices are located at least partly on the wall, and extend into the press space.

Abstract: A method and an apparatus for obtaining digital periodic time function signals, and wherein each time function signal is defined by an instantaneous frequency varying in dependence of time within a characteristic period T equal to the period of a first clock signal, includes a generator for generating a second clock signal, period counters for cyclically counting the periods of the second clock signal, a divider for deriving a third clock signal from the second clock signal, and wherein the third clock signal is a subharmonic of the second clock signal, a memory which has a plurality of storage cells for storing groups of binary numbers characteristic of the time function signals, respectively, an address counter for sequentially calling up and reading out the storage cells with the aid of the third clock signal, a logic circuit for enabling the count of one period counter with a predetermined delay with respect to the time of call-up of each corresponding storage cell, and bistable multivibrators for inverti

Abstract: The current transformer for instruments for measuring electric currents includes a magnetic core that has two cores and an inductive current divider with three parallel current paths. The current dividers form, together with cores, two current transformer stages whose magnetic fluxes mutually cancel one another. In a current transformer for AC currents having a DC component, the ratio of the ohmic resistances of the individual current paths is in direct relation to their transformation ratio.

Abstract: A transducer for measurement of a current includes a magnetic core, a single U-shaped flat conductor which has two wings, and a crown joining the wings. Each wing has two openings, and the magnetic core passes through the openings. The two wings constitute two conductive branches in thermal contact with one another, and each branch is adapted to carry a component of the current; the current component carried by one branch differs from the current component carried by the other branch. The current components give rise to opposite respective component fluxes in the magnetic core.