Abstract: The invention relates to a granular material for 3D binder printing, said granular material consisting of particles provided with an externally non-polar surface layer (2). The invention also relates to a method for producing a granular material for 3D binder printing, whereby a surface layer (2) having a non-polar outer side is applied to initial particles (1), and to a method for producing an object consisting of the inventive granular material, according to which a layer of the inventive granular material is applied to a base, and pre-determined regions (3) of said layer are moistened with a binding fluid, said binding fluid being selected from fluids in which a surface layer of the particles of the granular material is soluble. The invention further realties to objects consisting of interconnected particles of the inventive granular material. The invention enables a very precise printing process.

Abstract: The invention concerns the production of frangible ceramic mold cores for metallic casting, their production and use. In general, by the conventional debindering of the green ceramic, a substantial mechanical weakening of the cast mold occurs. Thus is particularly true in the case of awkward component geometry, such that a destruction of fine structures or freely projecting mold parts can occur during casting. It is thus the task of the invention to provide a geometrically complex mold core of slip-ceramic for metal casting, which exhibits a sufficiently high structural stability, in order to survive removal from pre-molds, as well as to survive metal casting without damage, and which thereafter can be removed in simple manner from the cast part. The task is solved in that the mold core includes ceramic microparticles, as well as a stable outer skin in which the microparticles are joined with each other by sintered nanoparticles.

Abstract: Sacrificial lost casting cores of green or fired ceramic, which include at least one tension spring as a metallic reinforcing element, wherein at least one end of this reinforcing element lies near one of the surfaces of the casting core or extends therethrough, and wherein the melting point of all metallic reinforcing elements lie above the melting point of the casting metal, as well as processes for production of such casting cores, including the steps of preparing a principal mold, seating therein at least one reinforcing element, filling the principal mold with ceramic slip, drying the slip for formation of a green ceramic and releasing the casting core from the principal mold. The principal mold is preferably lined with a flexible internal mold or liner. The reinforcing element in the form a tension spring can be used following casting for breaking up the ceramic casting core.

Abstract: Casting mold for metal casting, in particular precision casting of fine parts of steel, wherein at least the main part of the casting mold is comprised of porous ceramic with a high thermal coefficient of expansion which corresponds to the metal, and produced by generative rapid prototyping process, as well as generative rapid prototyping processes and coated powders particularly suitable therefore, as well as uses of the casting mold for tools and their components, in particular of steel.

Abstract: Process for layer-wise production of a three dimensional body (generative rapid prototyping), in particular by 3D binder printer, including a multiple succession of the steps of depositing a powder particle layer, activating in defined areas an adhesive present on the powder particles and/or in the powder particle coating, as well as adhering the powder particles to each other and to the layer thereunder, wherein the powder particle layer is electrically discharged by ionized particles and brushed flat by means of an electrically insulated blade prior to activation of the adhesive material, and the invention further concerns a device adapted for application of thin powder particle layers, including at least one ionizing device.

Abstract: Process for production of three dimensional bodies of particles by a layer buildup process (powder based generative rapid prototyping process), wherein the layer buildup is monitored by an optical control device, which evaluates the light intensity or color differences within and between deposited or hardened particle layers, as well as a suitable optical control device, and further yet, particles or binder liquid particularly suited for optical quality control.

Abstract: An exemplary embodiment includes an image intensifier television chain and an image subtraction device connected thereto, with at least one image memory whose stored image data is subtracted from image data which occurs at other time than the stored image data, and a display device for the subtraction images. A central control console is present at which a display configuration representing individual stages of the examination sequence is provided, which display configuration is controlled by a central control device in such a manner that the respective examination stages are displayed. The display configuration can preferably be distributed along a graphical image suggestive of the chronological contrast medium progression.

Abstract: A control installation for the dose rate of the x-ray tube and, thus, for the mean brightness of the output image of the x-ray image intensifier is present. Further, switching circuitry is provided, by means of which a preprogrammed rated value for the dose rate is selected, which rated value lies below the dose rate required for a diagnosis.

Abstract: An electronic read-only memory is provided for each photographic program whose input is connected to a resettable pulse counter which is actuatable step-by-step via a clock pulse generator and which memory delivers program signals predetermined by its program that correspond to the output signals of the pulse counter. The outputs of all read-only memories are connected to the component parts they control via a program selector circuit. A display matrix for displaying the content of the read-only memories is provided, which display matrix is connected at the output of the program selector circuit and whose display is synchronized by means of the clock pulse generator operating at a sufficiently high rate that the entire program can be observed at one time.

Abstract: The program control device contains an electronic read-only memory for each photographic program, whose input is connected to a resettable pulse counter which is actuated step-by-step via a clock pulse generator. Each read-only memory delivers program signals predetermined by its program that correspond to the output signals of the pulse counter and the outputs of all read-only memories are connected to the components they control via a program selector circuit. For a free program, a freely programmable memory is provided, whose content can be transmitted into an unprogrammed program module.

Abstract: The illustrated embodiment includes a selection device for the radiographic exposure values of each radiographic system, as well as a switching arrangement for connecting one of the radiographic systems in each instance to a common feed and control apparatus. The operating console is provided with representations of all associated radiographic systems. There is present for each radiographic system at least one signal lamp for the purpose of illuminating the representation of the radiographic system on the operating console, said signal lamp being a component of a monitoring device for monitoring the operational readiness and proper operation of the radiographic systems. It is possible to symbolically represent the path of rays of each radiographic system, and to associate with each radiation path symbol at least one signal lamp for the purpose of illumination which is likewise a component of the monitoring device.

Abstract: A program control device for the photographic cycle is present, which contains an electronic read-only memory for each photographic program. A resettable pulse counter is actuated step-by-step by a clock pulse generator and controls the selected memory to deliver program signals predetermined by its program. The outputs of all read-only memories are connected to the component parts they control via a program selector circuit. A correction memory is controllable for the input of correction program elements and is connected in parallel to the read-only memories. A recognition memory controlled by the pulse counter is connected to the program selection circuit and the program steps to be corrected are storable therein, so that, upon reaching such a program step, the correction memory (60) supplies the program in place of the respectively selected read-only memory.

Abstract: A manually actuatable sliding short-stroke switch is provided with a light conducting cap attached to the sliding piece and a touch surface above the cap. A means for illuminating the touch surface is provided, and the light conducting cap is covered on its surface with a layer impermeable to light except for a selected area of the touch surface and a light instance area for receiving light from the source. The light conducting cap and the touch surface provide a means for actuating the switch substantially unaffected by fatigue due to repeated use and which can be illuminated without transferring light to adjacent touch surfaces.

Abstract: An X-ray diagnostic installation employed for fluoroscopy and exposures, wherein the prevailing exposure voltage may be determined by a user. The output signal of a function generator controls an arrangement for indication of the prevailing exposure voltage. This indication may be effectuated by means of a digital recording arrangement. In an embodiment of the invention, a transmission arrangement between the output of the function generator and the input of a digital recording arrangement, may comprise a coding device for the output signals. Additionally, the installation also has a construction necessitating relatively low power requirements between the X-ray diagnostic apparatus and a remotely located control panel by providing a coding and decoding arrangement intermediate the coding device and the digital recording arrangement.