Abstract: A solar receiver (10; 110) for a solar thermal power plant comprises an elongated supply chamber (16; 118) for a heat carrier medium flowing in the supply chamber (16; 118) at a small loss of pressure, an elongated absorber (13; 113), the inlet areas (21; 119) thereof extending in a longitudinal direction and limiting the supply chamber (16; 118), and a drain chamber (18; 125) extending in a longitudinal direction and being contained in the supply chamber (16; 118) for the heated heat carrier medium and being limited by at least one outlet area (22; 124) extending in a longitudinal direction, the inlet area (21; 119) and the outlet area (22; 124) being offset against each other in a transverse direction. This is why the heat carrier medium flows in a transverse direction to the absorber (13; 113) so that the flow causing a loss of pressure is limited on a relatively short path and the heat carrier medium being heated flows towards the increasing intensity of incident radiation.

Abstract: The invention relates to a plasma reactor for flexible strand material (12) , comprising passages (20,22) for the strand material (12) to enter into and exit from the reactor chamber (16), electrodes (54,56,58,60) arranged in the reactor chamber (16) for generating a plasma, and at least one guiding element arranged in the reactor chamber (16) and being adapted to guide the strand material (12) along a processing path. In order to provide a compact plasma reactor (10) for flexible strand material (12) which permits a uniform and gentle processing of the flexible strand material (12), it is provided, according to the invention, that at least one guiding element is a roller (24,26) about which the strand material (12) revolves in several windings axially offset with respect to each other, and that the electrodes (54,56,58,60) are arranged such that the plasma generated by them simultaneously acts on portions (62) of at least two windings axially offset with respect to each other.

Abstract: This invention offers a process for the synthesis of a compound of the formula ##STR1## wherein R' is a phenyl, a substituted phenyl, a heterocyclic aromatic group, a heterocyclic aromatic substituted group, a linear or branched alkyl group, or a cycloalkyl group.The invention also comprises the following compounds of a formula 1' and 2' as useful new synthesis intermediates. ##STR2## wherein R is a phenyl, a substituted phenyl, an alkyl, a cycloalkyl and X is Cl, Br, I, F, CH.sub.3 SO.sub.3, p--CH.sub.3 --C.sub.6 H.sub.4 --SO.sub.3.

Abstract: The valve has a chamber (11) in a housing (10), wherein a valve seat (17) closed by a valve body (19) is arranged. The valve seat (17) is abruptly moved by an actuator (15), the valve body (19) not being able to follow due to its inertia and the valve seat (17) being opened a little. Thereafter, the valve body (19) hits a plunger (20) moved by the actuator (15) together with the valve seat (17). By this impact, the valve body (19) is moved fully off from the valve seat (17) so that the outflow opening (13) is cleared entirely. Then, the flow drives the valve body (19) back into the closed position. Using this valve, short switching periods with a large valve opening degree may be achieved.

Abstract: In order to reduce the conversion and cleaning effort between pre-dispersion by a dissolver (2) and fine dispersion by an agitating ball mill (3), it is proposed to combine both devices in a single container. The casing (31) of the agitating ball mill (3) is in the form of a toroidal annular channel with a central hole (34). The drive shaft (21) of the dissolver (2) runs through said central hole (34) in the agitating ball mill (3). Dispersion may take place in the dispersing device simultaneously or in succession. The agitating ball mill (3) is preferably lowered inside the container (1) along the common axis after a pre-determined time and caused to act on the substance to be dispersed (5).

Abstract: A trough-type parabolic concentrator (1) for a solar thermal power plant comprises a reflector plate (3) bent in trough shape and a support structure (4) for supporting the reflector plate (3) and comprising a plurality of wooden segments (2) arranged in a row in the longitudinal direction of the trough. Each segment (2) is assembled from a plurality of wooden frames (5). Using wooden frames (5) as the basic element of the supporting structure (4) allows for a lightweight, simple and low-cost structure of the trough-type parabolic concentrator (1).

Abstract: The invention refers to a process and a device for the treatment of fibrous material. In order to provide a process for the treatment of fibrous material which allows for cleaning and preparing fibrous material, the invention provides that fibrous material, especially combed sliver, textiles, non-woven fabrics and wool fiber bunches, are at first cleaned in a cleaning phase with support from a solvent, then dried in a vacuum drying phase, and then surface modified in a plasma treatment phase. The device (100,200) proposed according to the invention for the treatment of fibrous material comprises a cleaning vessel (102,202), a vacuum drier (104,204) and a plasma treatment vessel (106,206) for this purpose.

Abstract: The invention is directed to a method of manufacturing a double seam joining a can end (2) to a can body (1) which includes a sidewall (13) terminating in an outwardly directed flange (16) having a flange angle (.alpha.) within the range of 0 to -45.degree.. During the support of the can end (2) upon the flange (16) of the can body, seeming rolls (37, 38) form a double seam while an axial load of 600N or less is applied to force the can end and the can body one against the other.

Abstract: The protective headgear, such as a catcher's/umpire's headgear, is defined by a forward substantially concave rigid shell and a rear substantially concave rigid shell articulately interconnected together adjacent upper portions thereof. Resilient straps snap-secure opposite lower side portions of the forward shell to opposite lower edge portions of the rear shell. A rigid framework having a relatively large view opening is fastened to a view opening of the forward shell to afford maximum visibility to the user.

Abstract: A shutter (1; 10) for regulating the fluid flow in an absorber pipe (D) of a solar-thermal power plant comprises a shutter body (2) with a central shutter opening (3) for the fluid (F) and a movable throttle element (4; 12) at least partly closing the shutter opening (3; 11). The throttle element (4) is connected to a motion element (6) that is in thermal contact with the fluid (F) and changes its shape as a function of the fluid temperature so that in case of an increased temperature of the fluid (F), the opening cross section of the shutter opening (3; 11) is enlarged, whereby the mass flow of the fluid (F) increases and the temperature thereof drops.

Abstract: The machine tool comprises two headstocks (16,17), arranged on a support (10), which are movable independently of each other along their height and their longitudinal direction. A respective one (17) of the headstocks is active in the treatment of a workpiece attached on a workpiece carrier (20), while the other headstock (16) can be moved behind a tool magazine (24) for receiving a tool therefrom. While the one headstock is still working on the workpiece, the other headstock with the next tool can already be accelerated to the required working rotational speed and be advanced to the tool. Thus, the time required for exchange of tools is extremely shortened.

Abstract: A laser marking device for forming the pattern printed on a liquid crystal mask on the surface of an object. In the laser marking device, an input optical system (20) and an output optical system (30) are positioned on the input surface side of a reflective liquid crystal element (5) on which the laser beam (L) is made to fall through the input optical system (20). The angle of incident of the laser beam (L) on the input surface of the element (5) is approximately 90.degree.. The laser beam (L) reflected by the element (5) is directed to the object (15) through the optical system (30). A cooling means (17) which cools the element (5) is provided in contact with the surface of the element (5) opposite to the surface which the laser beam strikes. In such a way, the space for the optical systems (20) and (30) is reduced.

Abstract: An alignment tool is provided for aligning collecting plates of an electrostatic separator in substantially a common plane. The alignment tool includes a pair of elongated alignment members, at least one of which is of a convex configuration. The collecting plates, including any misaligned collecting plates, are sandwiched between the alignment members with the convex surface of one of the alignment members opposing the collecting plates. The convex member is then brought to a parallel position by forces applied to opposite ends thereof, and the alignment members are temporarily clamped in generally parallel relationship to each other which maintains the collecting plates aligned in a generally common plane. Thereafter, a rod of a permanent clamping mechanism having a plurality of loops is rested atop either of the alignment members and rotated to bring the loops into and through gaps between adjacent collecting plates.

Abstract: A cover sheet for painting, plastering, cleaning and lacquering jobs consists of a material sheet (10) folded into at least two folding layers (12a-12h) with longitudinally extending folds (11a-11h). A longitudinal edge portion (13) of the material sheet (10) protrudes beyond the other folding layers (12b-12h), an adhesive tape (16) being fastened along the longitudinal edge portion (13) and protruding laterally beyond the longitudinal edge portion (13). The adhesive-free side (18) of the adhesive tape (16) is provided with a cover strip (20) covering the adhesive tape (16). Using a cover strip and an adhesive tape, the desired properties of this combination may be selected from a great variety of possible combinations by selecting the corresponding tapes and strips.

Abstract: The invention is directed to a method for adapting injection molding machines utilizing horizontally opening and closing molds and their opening and closing mechanisms to vertically opening and closing molds and their opening and closing mechanisms and vice versa. An injection molding machine might, for example, be utilized to inject hot synthetic resin substantially horizontally into a cavity between horizontally opening and closing molds associated with horizontally opening and closing mechanisms. This horizontal mold and its opening and closing mechanism is removed relative to the injection molding machine and substituted therefor is a vertically opening and closing mold and its associated vertically opening and closing mechanisms. The hot plastic material from the horizontal injection molding machine is initially constrained in movement horizontally but subsequently vertically into the cavity of the vertically opening mold.

Abstract: The invention concerns a measuring device for determining the secretion of the sebum from the skin using a microporous, water-repellent, sebum-absorbing opaque foil (4) which, on contact with the skin, can absorb sebum secreted by the surface of the skin, the transparency of the foil (4) being a measure of the absorbed sebum. In the edge region the sebum-absorbing foil (4) is attached to a carrier (2) which is provided with a window or is transparent in the area of the foil (4) to be brought into contact with the surface of the skin.

Abstract: A sand trap and flow controller mechanism for a bathtub includes an outer housing defined by an externally threaded peripheral wall having an upper outwardly directed peripheral flange and a lower inwardly directed peripheral flange with a pair of diametrically opposite openings, an inner sand trap housing defined by an outer peripheral wall, an inner peripheral wall and an annular wall therebetween collectively defining a sand trap chamber, and a flow controller mechanism having diametrically oppositely directed wings which are received in channels for guiding a valve of the flow controller toward, in sealing engagement upon and away from an upper peripheral edge of the inner peripheral wall of the inner sand trap housing.

Abstract: Membrane element consisting of carrier disk and membrane cushion for filtering and separating flowing media, especially in devices for filtering and separating fluids by membrane techniques. Aim of the membrane element according to the invention is the essential reduction of the losses of pressure inherent to the modules by eliminating the sharp redirections of the flow by the usual carrier disks and membrane cushions in plate modules. This is achieved by a circular guidance of the flow of the fluid to be separated between carrier disk and membrane cushion. The carrier disk according to the invention is provided with a slit-like passage so that, after a concentric, circular flow over the carrier disk and the corresponding membrane cushion, a guidance of the flow to the next carrier plate level with the correspondingly formed membrane cushion is made possible with minimal loss of pressure and almost without redirections.

Abstract: A process of forming a rivet from a sheet of metal, typically double reduced steel, by producing a blister surrounded by an annular configuration in a first operation or first stage. A second operation or second stage forms the blister into a boss by flattening the annular corrugation between a die and a support so as to push metal back toward the center of the blister. Finally, the boss is converted into an upstanding hollow rivet.