Abstract: A device for the projection of image information comprises at least one screen 1,2 on which the image information can be displayed using a plurality of individual light spots 3,4,5. The viewer of the screen 1,2 and particularly his eye movements, can be observed by assigning a light-sensitive sensor to each light spot 6,7,8 of a certain number of light spots 6,7,8. The light sensitive sensors are connected to an evaluating device.

Abstract: Connection piece (3), which is mounted on the end of a wire cable (2), for connecting the wire cable (1) to a mounting support taking up tensile forces caused by longitudinal stresses in the wire cable (2), in which the external dimensions of the connection piece (3) in the direction transverse to the extended axis of the wire cable end (1) are substantially equal to or smaller than the diameter of the wire cable (2) and in which the wire cable is compressed in its end region until the wire cable end (1) fits into a cutout (6), provided for receiving the latter, in the connection piece (3).

Abstract: A laser machining head for a numerically controlled machine tool having a tool holder for coupling with a mechanical machining head is disclosed. The laser machining head comprises a first element comprising a tool shaft, the tool shaft being configured for coaxially coupling the laser machining head to the tool head, and a second element containing laser optics. The second element is movably connected to the first element so that the position of the second element relative to the first element is adjustable.

Abstract: A process for conglutinating wood fragments wherein the wood has middle lamella lignin, comprises incubating the wood fragments in an incubation mixture containing a phenol oxidizing enzyme thereby activating the middle lamella lignin. This makes it possible to produce formed bodies such as fiber boards, for example, without chemical disintegration and without addition of binders.

Abstract: The present invention relates to a gas compressor which prevents noise being produced in the suction conduit during idling. In conventional systems, the noise results from the collision of arriving and returning gas by means of a check valve provided between the suction chamber and the suction conduit. The present invention avoids this noise by providing an additional chamber which is connected via an admixture valve to the compression chamber (20) during the idling operation. This invention is especially applicable to pneumatic systems in automotive technology.

Abstract: A ripping tool, particularly for the paper-hanging trade, to rip existing water-resistant wall-paper before removal of same. The ripping tool is characterized by a spiked roller which is split in two to form at a spiked roller pair which can be rolled over the surface of the existing wall-paper. The elements of the spiked roller pair are forcibly and oppositely displaced, along a common axial direction during the rolling process.

Abstract: The vacuum cleaner nozzle of the invention is provided with a nozzle body equipped with a suction pipe connecting piece and with a bottom plate which closes off the nozzle body towards the bottom, whereby at least one flow channel which is open towards the bottom and lets out into a central suction channel connected to the pipe connecting piece is located in the bottom plate. The flow channel is here double-parabolic in profile, meaning that it is parabolic in its cross section as well as in its longitudinal section extending perpendicularly to the bottom plate in relation to the longitudinal axis of the flow channel. The cross-section increases in this case from the bottom of the flow channel in the direction of the floor and from the end of the flow channel away from the suction channel in the direction of said suction channel. Thanks to this configuration of the suction channel, even distribution of the suction capacity is achieved over the entire width of the vacuum cleaner nozzle.

Abstract: The inventive device controls the trailing axle of a vehicle having at least two rear axles, wherein at least one rear axle is a driving axle. Pressure fluid chambers, mounted on both the driving and trailing axles, support the vehicle structure. Their pressure is varied to raise or lower the vehicle structure depending on the vehicle load and road conditions. The inventive device further comprises a first valve arrangement and a second valve arrangement. The first valve arrangement selectively connects the pressure fluid chambers of the driving axle to a compressed-air supply, to a pressure fluid sink, or isolates them. The first valve arrangement has a first and a second valve. The first valve is a 3/2-position valve actuated by a first solenoid. The second valve of the first valve arrangement is a 2/2-position valve actuated by a second solenoid. The second valve arrangement is a 3-position valve actuated by a third solenoid.

Abstract: The present invention describes a system and method for maintaining databases. An ordered genealogy table is provided for implying hierarchical relations on an as-needed basis. The invention further provides relational search capabilities to a hierarchical database. The invention also allows a database that is maintained on a computer system in a hierarchical structure to be converted into a database that is maintained in a relational structure, and vice versa. In addition, the invention may be used with currently existing hierarchical and relational databases.

Abstract: A sporting or hunting arm comprising a barrel assembly, a casing containing the triggering mechanism, a safety means for changing the arm from a safe to a ready-to-fire position, and a supplementary safety device comprising a time-lag relay started by a sensor when the safety lever is changed into the ready-to-fire position and emitting a signal after lapse of a preadjusted time interval, the signal being either an audible signal emitted by a buzzer or a visible signal emitted by a diode, and/or causing an actuator to return the safety means into the safe position. The safety means can be a cocking slide held in cocked position by a holding lever, wherein the actuator acts on the holding lever or on a shock-safety means. Warning means responding to the state of loading of the battery and an adjusting device accessible from outside can be provided.

Abstract: An electronic file equipment which duplicates stocked image data and which permits the image data to be accessed at high speed. Using a console, an operator instructs a control device to register an optical disk housed in an optical disk library. The control device reads image data stored in the pertinent optical disk through an optical disk library I/O control unit, and stores the read image data in a disk array through a disk array I/O control unit. In addition, information which indicates the corresponding relation between the pertinent optical disk and the image data stored in the disk array is generated and is stored in the disk array along with the image data.

Abstract: Continuous belt weighing machine for fibre tufts. The fibre tufts are opened by an opening unit and drop onto a transport belt with weighing cells. The speed of the transport belt is constant, the speed of the feed cylinders is varied in accordance with the measurements.

Abstract: A fully differential, wide-band transconductance-transimpedence amplifier with a tuneable gain is disclosed. The amplifier includes a transconductance stage for generating a current signal from an inputted voltage signal. The amplifier also has a current gain stage for amplifying the current signal generated by the transconductance stage. Additionally, the amplifier includes as transimpedance stage for generating an output voltage signal from the amplified current signal generated in the current gain stage.

Abstract: A system and method are disclosed for adapting the rate of a data terminal equipment having a V-series type interface connected to an integrated services digital network which supports more than two simultaneous communications. A V.110 rate adapter is provided which receives user data at a user data rate from the data terminal equipment and outputs a bitstream containing the user data at a B-channel data rate. A fractional rate adapter is also provided which receives this bitstream and outputs a second bitstream at a lower subchannel data rate using a bit discarding technique.

Abstract: In accordance with the invention a rough overlayer, e.g., a tungsten film, is used to define a plurality of pillars in a polysilicon electrode layer. This increases the surface area of the polysilicon electrode and thus increases capacitance of a capacitor incorporating the electrode layer in a DRAM cell.

Abstract: Disclosed is a method for the discriminating of obstacles by means of a radar, and its different applications to the measurement of a liquid in a tank or vessel, or again to the elimination of unwanted or parasitic echos coming notably from the ground, for radars mounted on vehicles or controlling vehicle traffic. To implement the method, the obstacle to be discriminated must have a substantially plane surface. The disclosed method then consists in successively transmitting substantially plane waves at slightly different angular frequencies .omega..sub.i, each wave being furthermore sent with two different polarizations p and p' chosen in such a way that these different coefficients of reflection on the obstacles according to the incidence of the waves give a criterion of discrimination. The processing at reception depends on the use (measurement of distance, elimination of parasitic echos etc.).

Abstract: A diffusing display screen resulting from the combination of a cell comprising a polymer dispersed liquid crystal material which can be made diffusing, and of a cell comprising an electrochromic material which can be made absorbing and reflecting. Outside the operating mode, the display screen according to the invention has the advantage of being transparent, and thus capable of being fixed onto any surface (window, wall, etc.).

Abstract: A surgical drill guide for treating fractures in the craniomaxillofacial region is disclosed. The drill guide includes a telescopic sleeve having an inner telescoping segment slidably mounted within an outer telescoping segment. The telescopic sleeve also has a through-going bore which connects a first opening at an end of the outer telescoping segment with a second opening at an end of the inner telescoping segment. The bore is dimensioned for slidably receiving a drill bit or other instrument therein. The telescopic sleeve is mounted on a handle which includes a trigger. The trigger is provided for slidably retracting the inner segment into the outer segment to expose a preselected length of a drill bit or other instrument inserted through the bore of the sleeve.