Abstract: A display screen operable on at least a partial area A in two operating modes, free-viewing mode B1, and restricted-viewing modeB2, with the residual display area of the screen outside the area A maintaining a free viewing mode; comprising a first backlight arranged below the residual display area; a second backlight arranged below the area A; a transmissive image generator in front of the backlights; a plate-shaped transparent light guide arranged between the image generator and the backlights that outcouples, through one of its large surfaces, light coupled in through one of its edges; light sources arranged laterally an edge of the light guide, wherein the light guide is transparent to at least 70% of the light emitted by the backlights, and wherein in the B1 mode, the light sources are switched on, and in the B2 mode, the backlights are on and the light sources are off.

Abstract: A display screen operable on at least a partial area A in two operating modes, free-viewing mode B1, and restricted-viewing mode B2, with the residual display area of the screen outside the area A maintaining a free viewing mode; comprising a first backlight arranged below the residual display area; a second backlight arranged below the area A; a transmissive image generator in front of the backlights; a plate-shaped transparent light guide arranged between the image generator and the backlights that outcouples, through one of its large surfaces, light coupled in through one of its edges; light sources arranged laterally an edge of the light guide, wherein the light guide is transparent to at least 70% of the light emitted by the backlights, and wherein in the B1 mode, the light sources are switched on, and in the B2 mode, the backlights are on and the light sources are off.

Abstract: In an intake module for an internal combustion engine having an intake module which includes a housing with a first volume in which air drawn in via an inlet orifice accumulates, a second volume in which the air is distributed to various cylinders of the engine and which contains inlet ports leading to inlet valves of the engine, a support module with associated throttle elements is arranged between the first volume and the second volume of the intake module within the housing so as to provide for short travel passages between the throttle elements and the intake valves of the engine.

Abstract: In an intake module for an internal combustion engine having an intake module which includes a housing with a first volume in which air drawn in via an inlet orifice accumulates, a second volume in which the air is distributed to various cylinders of the engine and which contains inlet ports leading to inlet valves of the engine, a support module with associated throttle elements is arranged between the first volume and the second volume of the intake module within the housing so as to provide for short travel passages between the throttle elements and the intake valves of the engine.

Abstract: A method for checking a ring optical network line for data transmission between a plurality of network subscribers in a motor vehicle, wherein one network subscribers carries out a master function, wherein, apart from the optical network line, there is a further communication line which has a star structure. The network subscribers having the master function is arranged in the centre of the star structure and is connected directly via the communication line to every other network subscribers. The optical network line is checked by the network subscriber having the master function outputting a start signal to the individual network subscribers. The individual network subscribers acknowledge the start signal for the network subscribers the master function via the communication line. After the start signal, the network subscriber having the master function outputs an initialization signal via the optical network line.

Abstract: In a method of controlling a sensor for determining an oxygen concentration in a gas mixture, in particular in the exhaust gas of internal combustion engines, a detection voltage supplied by a Nernst measurement cell and corresponding to the oxygen concentration is transformed by a circuit arrangement into a pump voltage for a pump cell, and an anodic or cathodic limit current flows over the pump cell, depending on the oxygen content of the gas mixture. In stable operation of the sensor, during which an anodic limit current flows for a selectable period of time, the pump cell and/or the Nernst measurement cell receives at least one voltage pulse supplied independently by the measured detection voltage or the pump current thus established, so that the sensor is depolarized.

Abstract: A sewing machine with a balance wheel (1), which is detachably fastened on the arm shaft (15). The balance wheel (1) is secured against rotation by the cooperation of a carrier pin (17) transversely protruding from the arm shaft (15) with two axially extending recesses (7) in the balance wheel hub (1), which said recesses are open at one end. The wheel is secured axially by the cooperation of an elastic finger (9), which is fastened to the balance wheel (1) and has a mounting hole (12), with the carrier pin (17).

Abstract: A cassette for producing coffee by the cup or pot and for use with a liquid receptacle having an internal locking flange. The cassette comprises a ring defining an interior and forming a bottom annular groove to receive the locking flange of the liquid receptacle and thereby to hold the cassette in place therein. The cassette further includes a plurality of ribs connected to and extending across the ring and separating the interior thereof into a multitude of sections, and coffee particles disposed in said sections. A bottom filter and a top filter are secured to the ring and extend across the bottom and top, respectively, of the interior of the ring to hold the flavoring particles therein. Preferably, the cassette is packaged in a sealed vacuum pack; and as it is so packaged, the mass of particles in each section of the cassette is reshaped slightly and formed into a firm conglomerate, which facilitates the subsequent flow of hot water through the cassette.

Abstract: Apparatus for determining the focal plane of invisible laser-therapy radiation in ophthalmological instruments. A visible laser marking beam is split by simple means into four individual beams which share the instrument's optical path with the invisible laser radiation and are combined at the instrument's focal plane to form a single light spot.

Abstract: The invention relates to a modified microscope-photometer which makes it possible to record and evaluate inherent fluorescent spectra of organic tissue surfaces. The modified microscope-photometer affords the advantage of being able to illuminate the object in a path coaxial to the viewing direction.

Abstract: A cassette for flavoring a liquid and for use with a liquid receptacle having an internal locking flange. The cassette comprises a ring defining an interior and forming a bottom annular groove to receive the locking flange of the liquid receptacle and thereby to hold the cassette in place therein. The cassette further includes a plurality of ribs connected to and extending across the ring and separating the interior thereof into a multitude of sections, and particles disposed in said sections for flavoring a liquid. A bottom filter and a top filter are secured to the ring and extend across the bottom and top, respectively, of the interior of the ring to hold the flavoring particles therein. Preferably, the cassette is packaged in a sealed vacuum pack; and as it is so packaged, the mass of particles in each section of the cassette is reshaped slightly and formed into a firm conglomerate, which facilitates the subsequent flow of a liquid through the cassette.

Abstract: Readiness for operation of laser medical instruments or of flash generators for ophthalmological instruments is indicated in such a way that the readiness signal is perceptible only to the physician and not to the patient being operated upon. There is a mini-earphone to be worn in an ear of the physician. The conventional readiness signal, if of the optical kind, is converted to an audible signal delivered to the earphone of the physician. A photodiode responsive to the optical signal is part of the conversion system, which also includes an audiogenerator and an amplifier. If the conventional readiness signal is of the audible kind, the loudspeaker is rendered inoperative and a sound signal is produced in the earphone.

Abstract: The invention is directed to an arrangement for controlling a movement and includes an arrangement wherein the an actuating manipulator provides an output signal proportional to displacement. The arrangement includes a circuit which multiplies the output signal by a factor F which is dependent upon the speed of the actuation. In this way, the manipulator is suitable not only for controlling very fine sensitive positioning; but it also allows a fast displacement of the driven part over large distances. With manipulators for controlling movements in more than one dimension, output signals are multiplied by the same factor for all coordinates in order that directional accuracy of the movement is guaranteed at all speeds. A track ball can be utilized as a manipulator, for example. The arrangement of the invention is applicable for manually positioning microscope tables, coordinate measuring machines and ophthalmic apparatus.

Abstract: A retroreflection device is mounted beneath a transmitted-light specimen observed through a reflected-light microscope. The retroreflection device is in the form of an autocollimation system consisting of two high-aperture objectives and a flat mirror. The objectives image the specimen and the mirror one onto the other so that the specimen is further illuminated by its own coincident intermediate image. When making photometric measurements, the double passage of light through the specimen achieves an improvement in contrast as well as an increase in extinction values.