baber/WOPTO huggingface dataset:
Patent DE-3713679-A1 (DE)
Title: Process for preparing aluminium oxide
Inventor: ZIEGENBALG SIEGFRIED PROF DIPL
IPC: C01F7/22
Filed: 1987-04-24
Abstract: The invention relates to a process for preparing aluminium oxide by hydrochloric acid digestion of clays or alumina-containing minerals. The aim of the invention is an environmentally friendly process for preparing alumina with low losses of Al2O3. It is an object of the invention to provide a process in which an alumina suitable for use in melt electrolysis (dry electrolysis) is prepared with utilisation of the initial K2O content of the raw clay, and the remaining alkali metal and alkaline earth metal chlorides are converted into a solid product. According to the invention, this object is achieved by cooling the barren liquor from the crystallisation stage, with the addition of < 10% of water or vapour condensate, to a temperature </= 30@C, working up the crystallisate thus formed in a known manner to give KCl- or K2SO4-containing fertilisers, feeding the main amount of the mother liquor to the crystallisation stage, evaporating a sub-stream amount of the mother liquor to about 23-30 % by mass of CaCl2, converting the AlCl3.6H2O crystallisate thus formed, by addition of water or vapour condensate, into a mother liquor which is a precursor to the crystallisation stage, converting the CaCl2-rich residual solution, in a known manner with addition of sulphuric acid, into gypsum sludge.
Patent DE-3717506-A1 (DE)
Title: Process for washing out salt residues
Inventor: WILMS HANS
IPC: B09B3/00
Filed: 1987-05-23
Abstract: Published without abstract.
Patent DE-3718810-A1 (DE)
Inventor: GEPPERT HELMUT DIPL ING
IPC: B65G21/08
Filed: 1987-06-05
Abstract: For securing input and output side openings (7) between the circumferential region (30), which neighbours the supporting frame, of a deflection or feed or a delivery roll (3) or roller for the conveying means (10) of a belt conveyor, and the front end, which neighbours the roll or roller, of the supporting frame (2) of said conveyor and/or a supporting piece of the bearing means for said roll(s) (3) or roller(s) against risk of accident by unintentional or unauthorised entry into such an opening by means of a cover element (11) which is fixed to the supporting piece and extends in such a manner as to bridge the opening (7), access to which involves danger, from the supporting frame side in the direction of the mid-longitudinal plane of the belt conveyor, in which an improved rigidity of the supporting piece is achieved in spite of the possibility for reducing the material thickness of the said piece, together with a resulting improvement in the possibility for lightweight construction of the entire supporting frame structure and thus an overall reduction in the production cost of such a belt conveyor, according to the invention the cover element is designed as at least the region (30), which neighbours the supporting piece, of the roll (3) or of the roller, which neighbours the supporting frame, on that side of the roller between the incoming and outgoing strand (10a and 10b respectively) of the conveying means (10) which does not guide said means, with only one clearance space for movement or adjustment of said covering apron (11). <IMAGE>
Patent DE-3723522-A1 (DE)
Title: Device for reversible optical data storage and its application
Inventor: EICH MANFRED DIPL PHYS
IPC: G11B7/246
Filed: 1987-07-16
Abstract: The invention relates to a device for reversible optical information storage using polymeric blend systems as the storage medium, the device including a film of a polymeric blend system P as the storage medium and being set up in order that a heat source can be used to heat up the storage medium locally for storing and a local variation of the mixing state allows the information to be stored.
Patent DE-3724418-A1 (DE)
Title: Displaceable detonating block on the firing barrel of an anti-tank practice hand-held weapon
Inventor: VOSS ALFRED
IPC: F41A19/57
Filed: 1987-07-23
Abstract: In the case of an anti-tank hand-held weapon from which it is intended to fire preferably sub-calibre ammunition for practice purposes, the intention being to use the firing barrel a plurality of times, replacement of the propellant charge detonator (5) is a weak point. For safety reasons, it is intended that only one propellant charge detonator (5) be capable of being fitted to the weapon. Simple and sealed installation must be possible even when it is cold and in darkness. For this reason, it is proposed to construct the detonating block (1) to be displaceable on the barrel and the propellent charged detonator (5), in an adaptor, preferably such that it can be screwed in. <IMAGE>
Patent DE-3734273-A1 (DE)
Title: Working vehicle, in particular front loader
IPC: E02F9/24
Filed: 1987-10-09
Abstract: The working vehicle, disclosed by the example of a front loader, contains a shovel (2) which is linked to the vehicle (1) and takes hold of the material to be loaded. The movement of the shovel (2) relative to the vehicle (1) can be hydraulically controlled. In order to prevent the escape of highly volatile, environmentally hazardous compounds into the open when excavating and seizing contaminated earth (3) or the like, a cover plate (5) serving as a cover for the shovel space (4) is allocated to the shovel (2). The cover plate (5) is mounted on the shovel in such a way that it can be moved by means of a drive unit (6) from an open position into a closed position and vice versa. Furthermore, the shovel space (4) is connected to a fan (7) serving to draw off air containing highly volatile, organic compounds. An air filter (8) serving to purify the air is connected downstream of the fan (7). <IMAGE>
Patent DE-3739735-A1 (DE)
Title: Nickel fibre electrode and a method for its production
Inventor: FABER PETER DR
IPC: H01M4/52
Filed: 1987-11-24
Abstract: A fibre electrode consisting of nickel fibres having a mean fibre diameter of 20-50 micrometres is proposed. The electrode carries the separately manufactured fibre structures on both sides, in the form of 0.5 to 2.0 mm thick mats. Located between two fibre mats is an arrester consisting of sheet nickel, nickel metal mesh or a nickel gauze. In contrast to known sintered-powder electrodes, the combination between the fibre structures and the inner arrester can be produced by electrical welding. In this case, in the event of continuous manufacture of the electrode according to the invention, it is important to cycle the welding process onto points or lines successively in time. This can be achieved without any difficulties by electronic control. In contrast, in the case of simultaneous welding, a plurality of mutually independent electrical welding apparatuses must act on the respective combination points of the nickel fibre electrode.
Patent DE-3742409-A1 (DE)
Title: Linear drive arrangement
Inventor: GOETTLING HELMUT
IPC: F15B15/02
Filed: 1987-12-15
Abstract: In a known linear drive arrangement, the piston rod of a working cylinder interacts with a gear and a driver in such a manner that, on a movement of the piston rod, the driver is moved in the direction of the longitudinal axis of the working cylinder via the gear. The known linear drive arrangement is relatively expensive in its construction. The invention proposes providing two working cylinders, the pistons (11, 10) and (22, 23) of which are rigidly interconnected via a common piston rod (13), the piston rod (13) being provided with a toothing (14). The toothing (14) of the piston rod (13) is in engagement with a first gear wheel (19) of two rigidly interconnected gear wheels (19) and (18). By means of the second gear wheel (18), a driver (35), designed e.g. as a chain, is driven, which is guided in a guide arranged parallel to the longitudinal axis of the two working cylinders. <IMAGE>
Patent DE-3742797-A1 (DE)
Title: Profiling for the tyres of motor vehicles with the aim of avoiding aquaplaning
Inventor: LEHNDORFF GUSTAV
IPC: B60C11/04
Filed: 1987-12-17
Abstract: By designing tyre grooves to be inclined from the inside to the outside and by increasing the off-flow channel, the invention is to ensure that the water which may be located on the surface of the road is moved outwards and the contact of the tyre with the surface of the road is not lost until a very late point. It is to be noted here that masses of material which impede the flowing-off of the water are not present so that the flowing-off can take place unimpeded in an extremely short time.
Patent DE-3743194-A1 (DE)
Title: Method and device for optical distance measurement
Inventor: SCHECK WERNER DR
IPC: G01C3/00
Filed: 1987-12-19
Abstract: A strongly collimated light beam (18) thrown by a light source (16) of a measuring device (10) onto an object (12) is reflected into the device (10), deflected and unidimensionally focused by means of a mirror surface (24) resembling a cylindrical lens and dispersed by a beam-splitter (30) into two partial beams (32, 34), to which is assigned, in each case, a photodiode (36, 38) on the same optical axis. Both diodes (36, 38) have different separations from the beam-splitter (30) and the photodiode (38) further from the beam-splitter (30) lies on the focal line of the focusing mirror surface (24). The result of this is, in principle, a linear dependence of the distance to be measured on the quotient of the measured photo-currents. <IMAGE>
Patent DE-3800175-A1 (DE)
Title: Method for achieving absorption in the X-ray range for civil and military purposes using oxides in dyes and plastics and in and on glass
Inventor: STOLZENBERG PETER GEORG
IPC: G21F1/00
Filed: 1988-01-07
Abstract: By applying a material mixture of suitable intensity and corresponding material thickness, the material mixture takes up the impinging X-ray radiation by absorption. This is also true if the absorption layer is in front of a reflective metal surface. The saturation boundary of the radiation intensity limits this process. For this reason, the coating thickness is also important, because the absorption intensity increases therewith. The X-ray energy is taken up by the material, both in the near region and over larger distances, the path attenuation of the atmosphere being additional. If the layer thickness is dimensioned from 0.2 mm to 3 mm and more, the effect improves increasingly. This can be achieved either by means of various individual materials or by means of an overall material mixture, inter alia also by means of layers. It is expedient to select a favourable layer thickness, in order also to obtain satisfactory functioning under near-field conditions. The mixture of the materials is intended to be carried out proportionately according to the range function requirement and thereby, if possible, to achieve 100% absorption in each case. In the case of incorporation into glass, this functions differently but therefore more favourably, since higher or equally high absorption properties can be achieved through the optical non-dyeing effect of the absorption pigments.
Patent DE-3801894-A1 (DE)
Title: Electrical display device
Inventor: HOLTHAUS ALFRED
IPC: G09F21/04
Filed: 1988-01-23
Abstract: Published without abstract.
Patent DE-3802404-A1 (DE)
Title: Semiconductor laser
Inventor: BENEKING HEINZ PROF DR RER NAT
IPC: H01S5/10
Filed: 1988-01-28
Abstract: Laser oscillators having good frequency stability are at the moment produced using mechanically complex and high-cost structural parts. A laser arrangement is thus specified according to the invention, which has a great resonator length with simple manufacture, in order to ensure frequency-stable laser operation with good phase selection. To this end, a round semiconductor wafer is used within which a laser element is integrated in such a manner that the light path is diverted to the surrounding medium by total-internal reflection on the boundary surface of the semiconductor wafer, such that the laser light enters the laser element again after multiple reflection - like a ring laser.
Patent DE-3802731-A1 (DE)
Title: Ventilation system for a closed space
Inventor: TRUEMPER HEINRICH PROF DIPL IN
IPC: F24F7/04
Filed: 1988-01-29
Abstract: The invention relates to a ventilation system for a closed space, in particular a space in which people reside, into which space supply air is passively introduced and out of which space exhaust air is sucked at the top, the supply air (22) being passed over a heat exchanger (8) subjected to transmission heat. Such a ventilation system is to be improved so that the energy requirement is considerably reduced. This is achieved in that the supply air (22) is introduced solely close to the floor area (2) in such a way that a displacement ventilation (23) directed from the bottom upwards and having an air change of less than 1 per hour takes place and that an optionally provided space-heating means is constructed as a radiant heating means (16) in the upper region of the space. By means of the invention, mixing ventilation in the space is avoided and improved utilisation of the thermal energy of the supply air (22) is thus obtained. <IMAGE>
Patent DE-3802992-A1 (DE)
Title: Spray valve device for dust suppression in underground spaces, in particular in underground operations with hydraulic support units
Inventor: WEIRICH WALTER
IPC: E21C35/22
Filed: 1988-02-02
Abstract: The spray valve device according to the invention has combined in a construction unit a hydraulically pressure-balanced spray valve (7) designed as a non-return valve, the valve body (8) of which can be lifted from the seat (10) via a hydraulically operable control piston (17) in order to switch on the spraying. Here, a back-pressure valve (21) designed as a non-return valve is arranged in the control line leading to the control piston (17). Furthermore, the valve unit has a closing valve (27) which is likewise designed as a spring-loaded non-return valve and can be opened in a controlled manner via a second control line (St2) in order to close the spray valve (7) hydraulically locked in the open position. <IMAGE>
Patent DE-3805429-A1 (DE)
Title: Method of eliminating house dust mites, preferably in beds and carpets
Inventor: HOELTER HEINZ DIPL ING
IPC: B01J19/10
Filed: 1988-02-22
Abstract: The invention describes a method of eliminating house dust mites and other vermin in beds, carpets and the like, which is characterised in that a controllable ultrasound source forces the vermin to follow a predetermined escape direction at different alternating frequencies, the escape direction ending in a lethal trap.
Patent DE-3806067-A1 (DE)
Title: Pocket calculator
Inventor: NEUBERT ERNST
IPC: G06F15/02
Filed: 1988-02-26
Abstract: Pocket calculator, that is an electronic calculator which is built of integrated circuits and microprocessors, with a display, an input keyboard and a mains-independent battery or accumulator power supply, with a memory to store operands and operators which have been entered via the keyboard even beyond the execution of the current calculation. The entered operands and operators can be called from the memory into the display one after another via the keyboard. Preferably, operands and/or operators which have been called into the display can be corrected, and then the whole calculation is executed again with the possibly corrected operands and/or operators.
Patent DE-3808002-A1 (DE)
Inventor: KOPP KURT
IPC: E01H/
Filed: 1988-03-10
Abstract: PCT No. PCT/EP88/01035 Sec. 371 Date May 8, 1990 Sec. 102(e) Date May 8, 1990 PCT Filed Nov. 13, 1988 PCT Pub. No. WO89/04892 PCT Pub. Date Jun. 1, 1989.Snow-ploughs for frontal mounting on road vehicles are provided with an avoidance device, which in known types can be implemented by means of two circular curved guides. This poses problems, however, during mounting as well as during avoidance, particularly on hard surfaces. In order to ensure firm and reliable mounting of the plough blade (1) on the curved guide and hence problem-free avoidance, the curved guide is designed as a sliding bearing. To this end, it comprises a first and a second curved actions. A forced limiter with a descending characteristic curve is also provided. The snow-plough is suitable for use as road snow-plough.
Patent DE-3811711-A1 (DE)
Title: Degorging closure
Inventor: QUETSCH ANNEMARIE
IPC: C12G1/08
Filed: 1988-04-08
Abstract: Degorging closure, comprising a closure body having a cavity which can be sealed to the medium via a stopper part, more precisely by means of a screw which projects out of the closure body head. Further manipulation of the screw releases a duct from one side for cleaning. This closure permits for the first time an introduction to bottle fermentation without needing to have the currently conventional yeast residues in the entire bottle and permits for the first time "warm degorging", without needing to open the bottle at all.
Patent DE-3812926-A1 (DE)
Title: Centrifugal pump with magnetic coupling (clutch)
Inventor: SCHOMMER HARRY
IPC: H02K7/11
Filed: 1988-04-18
Abstract: In order to secure a centrifugal pump with magnetic drive against escape of delivery medium into the open atmosphere, a closed and sealed connecting casing (connecting skirt 23) which surrounds the split pot (13) and the magnetic coupling (9a, 9b, 15, 17a, 17b) is arranged between the drive motor (21) and the centrifugal pump (1). The drive motor (21) is likewise designed completely closed and sealed. <IMAGE>
Patent DE-3812939-A1 (DE)
Inventor: ZACHRAI JUERGEN
IPC: H02B1/26
Filed: 1988-04-19
Abstract: The invention relates to a fixing element to join a support rail to a wall of a switchgear cubicle. The fixing element permits an end side of the support rail to be closely joined to a wall of the switchgear cubicle when the configuration is such that a stop plate is integrally formed on an end side of a retaining block whose cross-section is matched to the cavity enclosed by the support rail and which can be pushed into the support rail, that the stop plate covers the end side of the support rail and closes with its outer contour in a flush manner, and that at least the end side of the retaining block with the stop plate is provided with a fixing hole and a sealing web surrounding the fixing hole. 
<IMAGE>
Patent DE-3816512-A1 (DE)
Title: Universally infinitely tunable photon filter
Inventor: NIMTZ GUENTER PROF DR
IPC: G02B7/00
Filed: 1988-05-14
Abstract: Previous light filters are in principle based on absorption, interference, polarisation, or dispersion, that is to say the radiation to be filtered is transported through an optically dense medium. Using conventional technology, the selectivity cannot be infinitely varied. The invention presented here intends to remedy this in that the light is transported through channels, that is to say an optically thin medium. It is based on the recognition in physics that electromagnetic waves cannot pass waveguides whose diameter is smaller than half the wavelength. When light is made to pass through a medium of flexible or elastic material, provided with corresponding channels, the diameter of the channels can be reduced or increased through electrical, magnetic or mechanical influence on the material. Depending on the choice of initial diameter, electromagnetic radiation whose wavelength is larger than twice the diameter of the channel can be filtered out or switched. When using a static material which has predetermined channel diameters, arranged in a suitable, natural manner, the channel width can be varied by moving (e.g. rotating) the filter.
Patent DE-3816836-A1 (DE)
Title: Rear-wheel suspension for motorcycles
Inventor: BRANDLHUBER BENNO
IPC: B62K25/10
Filed: 1988-05-18
Abstract: A rear-wheel suspension for motorcycles is described, in which the direction (14, 15) of action of a spring and damper unit (suspension strut 7) intersects the prolongation of the longitudinal axis (3a) of an angled swivelling fork (3) in front of the swivel joint (2a) of the angled swivelling fork (3) in the direction of travel. By this means, a spring and damper behaviour which is more progressive compared with the prior art can be produced. <IMAGE>
Patent DE-3818693-A1 (DE)
Inventor: GAEMMERLER HAGEN
IPC: B65H29/60
Filed: 1988-06-01
Abstract: In a device for changing the direction of transport of a layered product flow of paper products by means of a shunt (30), the latter is arranged for example in or near a structural component which can be connected by means of a single system of paired conveyor belts with neighbouring components, and at least one conveyor belt (3) of this system and its return strand (4) is run round laterally and/or in the plane of the shunt around the shunt region.
Patent DE-3822317-A1 (DE)
Title: Radial piston pump
Inventor: LISKA GEORG
IPC: F04B1/053
Filed: 1988-07-01
Abstract: A radial piston pump has an eccentric cam (3) which is fixed to a drive shaft (2) and sets into reciprocating motion one or more delivery pistons (4) arranged radially with respect to this eccentric cam. The eccentric cam (3) moves in a housing bore (12) which is sealed via an intermediate cover (1A). A suction aperture (9) opens into an annular duct (10) recessed into the intermediate cover (1A). A wall (11) of the annular duct (10) forms with the housing bore (12) a narrow annular gap (13) on the side facing the eccentric cam (3). This annular gap (13) extends over the entire circumference of the wall (11) and serves as a hydrodynamically favourable through cross-section for the sucked-in pressure oil in a suction chamber (14). The shortest distance (x) between the eccentric cam (3) and the housing bore (12) is smaller than the width (y) of the annular gap (13) in order to achieve a "falling delivery rate characteristic". <IMAGE>
Patent DE-3830607-A1 (DE)
Title: Structural profile having a square outer cross-section
Inventor: KITZ JOSEF
IPC: F16C29/00
Filed: 1988-09-06
Abstract: The invention relates to a structural profile having a square outer cross-section, in which there are arranged a plurality of cavities (4, 5, 7) running in the longitudinal direction of the profile, some of which are accessible from the sides of the profile and some of which are closed. In order to improve and increase the possible applications of the structural profile, to increase its bending strength, to reduce its weight and to reduce the production costs, the invention proposes that there be arranged in the profile (1) a cavity (3) which runs centrally with respect to the longitudinal axis (2) of the profile and has a circular cross-section. <IMAGE>
Patent DE-3831608-A1 (DE)
Title: Device for fastening the magazine block of an impact appliance
IPC: B25C1/00
Filed: 1988-09-17
Abstract: For a power-driven impact appliance, in particular for driving in fastening means, such as staples and nails, having a magazine for storing a plurality of the fastening means, which can be moved in the direction of the inner magazine end which leads into the ejection channel by means of a magazine block which is arranged displaceably in the magazine and is under the force of a scroll spring, and having a device for fixing the magazine block in its end position at the outer magazine end, it is proposed to equip the magazine block with a rotatable pull which is pivotable about the axis of rotation of the scroll spring and, as a result of the scroll spring, is constantly under the action of an inward-directed torque, so that in its outer end position it automatically pivots behind the outer magazine end.