baber/WOPTO huggingface dataset:
Patent DE-3725583-A1 (DE)
Title: Phosphorous acid solns. of low iron and arsenic content - prepd. by converting sec. calcium phosphite to prim. calcium phosphite solns., removing iron and arsenic by pptn. etc
Inventor: SOMMER KLAUS PROF DR
IPC: C01B25/163
Filed: 1987-08-01
Abstract: The prepn. of phosphoric acid solns. with low iron and arsenic levels comprises (a) converting sparingly water-soluble sec. calcium phosphite into a soluble prim. calcium phosphite; (b) removing iron and arsenic from this soln. as much as is possible; (c) liberating the phosphorous acid using sulphuric acid, and pptg. out the calcium sulphate. Step (a) is pref. carried out using stoichiometric amts. of phosphorous acid to form prim. calcium phosphite, or with stoichiometric amts. of sulphuric acid, in which case the calcium sulphate pptd. is removed. Pref. the iron ions are removed in step (b) by adding solns. of alkali hexacyanoferrates, e.g., potassium hexacyanoferrate-(II) and ferrate-(III), and the arsenic impurities are removed by treating the soln. with sodium thiosulphate soln. USE/ADVANTAGE - Phosphorous acid is used in the prepn. of complexing phosphonates. The process of the invention uses sec. calcium phosphite obtd. as a by-prod. in hypophosphate prepn. The process gives phosphorous acid solns. which are low in iron and arsenic and therefore suitable for phosphonic acid prepn. The solns. obtd. can be used to prepare phosphonic acid without further concn.
Patent DE-3726847-A1 (DE)
Inventor: TSAI KUO-LUNG
IPC: A61M5/168
Filed: 1987-08-12
Abstract: An optical intravenous injection monitor alarm and blocking device is adapted to be mounted on an intravenous set 5 or on an injection bottle, wherein the line interconnecting the light source 321 with the light sensor 41 is not coincident with the centreline of the intravenous set or the injection bottle. An alarm is sounded, or the flow of liquid through the injection tube is blocked, in response to the liquid level falling below the horizontal plane containing the light source and light sensor. Two monitor devices may be employed, one on the injection bottle and the other on a drip chamber of the intravenous set. The blocking device comprises a rotary electric motor or a solenoid driven via a control circuit from the output of the monitor device and compressing the injection tube by rotary or linear movement of a blocking member. A pair of relay contacts responsive to the blocking of the injection tube by the blocking member may serve to cut off power to the electric motor. <IMAGE>
Patent DE-3730918-A1 (DE)
Inventor: THIEMANN GERHARD
IPC: A01K91/06
Filed: 1987-09-15
Abstract: A line stop member is proposed, for the attachment of fishing floats, which consists of a flat flexible metal foil (4) having two projecting, resilient legs (8, 9) at the longest sides thereof, these legs being arranged in a linear and in an undulating design on the longest sides of the metal foil, it being possible for the flexible metal film to be shaped into the form of a line stop member, with the elimination of the legs, which according to the embodiment has an outline comprising one linear and one undulating strand. <IMAGE>
Patent DE-3732000-A1 (DE)
Title: Plug and ignition monitor
IPC: F02P17/12
Filed: 1987-09-23
Abstract: Published without abstract.
Patent DE-3736833-A1 (DE)
Title: Electrical assembly having a screening device
Inventor: BARDON HERMANN
IPC: H05K9/00
Filed: 1987-10-30
Abstract: The invention relates to an electrical assembly having a screening device, consisting of a screening frame which can be fitted on a printed circuit board, is electrically connected to conductive surfaces and made of sheet metal, and of a cover which closes the top of the screening frame. This cover must be permanently connected to the screening frame in an electrically highly conductive manner, over the entire length of the upper edge thereof. The covering metal sheet is bent through approximately 90@ at the edges, is bent around further inwards in a region adjacent to the bending edge and is bent back such that it is immediately adjacent, so that a bulge is produced which rests in a prestressed manner against the outer wall of the screening frame. The edges projecting from the plane of the covering metal sheet are slotted at right angles to the cover plane, and at least two mutually opposite side walls of the screening frame have recesses at the edge, it being possible to insert a region between two slots on the edge of the cover into at least one recess in each case. Screened electrical assemblies.
Patent DE-3737023-A1 (DE)
Title: Low-pulsation peristaltic pump
Inventor: FISCHER HANS DIPL ING
IPC: F04B43/12
Filed: 1987-10-31
Abstract: Peristaltic pump, low pulsation, pulsation influencing, discharge slope, analytical measuring equipment, inductively coupled plasma (ICP). In a low-pulsation peristaltic pump for analytical measuring equipment, in particular for atomisers that do not pump themselves, pressure rollers have a flat tread, axially adjacent to which is a pressure area with a circular active region. The circular active region, against which the pump tube lies, contains a long discharge slope between a flat constriction area and an area for feeding the tube in and out. By increasing the effectiveness of the discharge slope, the pulsation is compensated for in a simple fashion. <IMAGE>
Patent DE-3743282-A1 (DE)
Title: Locking device with an adjusting drive
Inventor: STAHMER MICHAEL
IPC: E05B81/20
Filed: 1987-12-19
Abstract: Locking device with an adjusting drive which has a fork latch (2) which is pivotable into a closing position by the adjusting drive (hydraulic cylinder 5) and which cooperates with a web (3) or tenon of a displaceable component. The fork latch (2) is locked in its closing position by a detent pawl (8) which is displaceable by the adjusting drive (hydraulic cylinder 5) into a release position freeing the fork latch (2). The unlocked fork latch (2) is displaced positively by the adjusting drive (hydraulic cylinder 5) into an open position freeing the web (3) or tenon. <IMAGE>
Patent DE-3743996-A1 (DE)
Title: Liquid, radiation-curable resin for the insulation of thin wires
Inventor: BIRKLE SIEGFRIED DIPL CHEM DR
IPC: C08G18/64
Filed: 1987-12-23
Abstract: Resins used for the insulation of thin wires should have high radiation sensitivity and be liquid at the application temperature; they should furthermore enable the production of insulations with good dielectric properties. This is achieved by a resin which is a product of the reaction of isocyanatoalkyl (meth)acrylate, isocyanatoaryl (meth)acrylate or a 1:1 adduct of a hydroxyalkyl (meth)acrylate and a diisocyanate with a product of the addition reaction of an aliphatic polyglycidyl ester and an alkanol having up to 12 carbon atoms or an  alpha , omega -alkanediol having up to 4 carbon atoms.
Patent DE-3800732-A1 (DE)
Title: Process for cutting glass blanks out of glass sheets, and apparatus for carrying out the process
Inventor: KOENIG WILHELM
IPC: G11B7/26
Filed: 1988-01-13
Abstract: The present invention enables glass blanks to be cut out of glass sheets with simultaneous introduction of a bezel (chamfer) which is necessary for later heating for re-shaping in order to prevent cracking due to the heating.
Patent DE-3804183-A1 (DE)
Title: Shaft seal for centrifugal pumps
Inventor: HANAGARTH WOLFGANG
IPC: F04D29/12
Filed: 1988-02-11
Abstract: The invention relates to a shaft seal for centrifugal pumps in accordance with the preamble of Claim 1. In order to guarantee a steady dissipation (removal, rejection), adapted to the varying operating conditions, of the heat produced in the seal cavity (pocket) and of any possible contaminant (dirt) or wear particles even without an external cooling device, the invention proposes two alternative solutions which are described in Patent Claims 1 and 2 and both of which exploit an internal circulating flow in providing an appropriate NPEH value at the bearing ring (controlled leakage, mechanical) seal on the side of the atmosphere.
Patent DE-3815079-A1 (DE)
Title: Arrangement for dynamic expansion
Inventor: WERMUTH JUERGEN ING GRAD
IPC: G11B27/032
Filed: 1988-05-04
Abstract: For expansion of compressed analog signals, a compatible expander in digital technology is required to achieve a wide dynamic range. A measurement path (M) ends in a signal path node (SM), in which measurement path a control path (R) with a reverse feedback (G) is provided which ends in a measurement signal path node (MM). An integrator (Sz-T'-Rf-A3) is provided in the control circuit in the direction of signal flow between a logarithmiser (LM) and a delogarithmiser (DG, D1), and the weighting of the signals emitted by the integrator differs for the feed to the measurement path (MM) and to the signal path (SM). Use in particular in the expansion of recordings compressed in analog form which first undergo analog/digital conversion and are then digitally expanded.
Patent DE-3815339-A1 (DE)
Title: Spectacles
Inventor: WEBER KARL
IPC: G02C1/08
Filed: 1988-05-05
Abstract: The invention relates to spectacles having individually replaceable lenses (1). The upper frame part (2) and the lower frame part (3) run parallel to one another and form U-shaped guide rails for the lens. The frame parts (2, 3), constructed as U-shaped guide rails, are laterally open at the place where their parallel course ends so that the lens (1) can be pushed out laterally. The outer side part (5) adjoining the parallel frame parts (2, 3) is constructed of two parts (7, 8) and has a flat rear stop strip (7) and a front holding bow (8), stop strip and holding bow complementing each other to form a U-shaped holder and the front holding bow (8) being able to be folded away. <IMAGE>
Patent DE-3817504-A1 (DE)
Title: Square-wave generator
Inventor: KOPP OSWALD
IPC: G01N27/22
Filed: 1988-05-24
Abstract: Square-wave generator having a frequency-determining RC-combination, whose capacitor is designed as a capacitative sensor. Connected downstream of this generator are a rectifier circuit and a threshold value circuit, by means of which a signal transmitter can be switched on when the capacitance of the capacitor exceeds a predeterminable value. This circuit can be used for manifold application purposes for the monitoring of objects, especially as a moisture sensor in the medical field.
Patent DE-3818803-A1 (DE)
Title: Process for producing valve spring retainers from plastic reinforced with fibres
Inventor: LUTZ DIETER DR
IPC: B29C70/14
Filed: 1988-06-03
Abstract: The invention relates to a process for producing a valve spring retainer from plastic reinforced with fibres, strip-shaped chopped-strand nonwoven fabrics which are respectively provided with a unidirectional fibre orientation being used as the starting material, and the inner strip is provided with fibres running in the longitudinal direction and the outer strip is provided with fibres running in the axial direction.
Patent DE-3818895-A1 (DE)
Title: False-floor panel and support therefor
IPC: E04F15/024
Filed: 1988-06-03
Abstract: Provided at each corner of the false-floor panel (31) is a continuous bore (41, 42, 43, 44) which is reinforced by a sleeve (32) and through which in each case one support (35, 36) can be vertically adjusted from above. The support exhibits a threaded bolt (36) which can be thread onto the internal thread of the tube part (36) by means of a securing means provided with a flange (33). The false-floor panel (31) is supported on said flange (33) and is fixed by a top screw (37), with the result that a frictionally locking connection is achieved. <IMAGE>
Patent DE-3822079-A1 (DE)
Title: Frame profile for frame shutterings
Inventor: STEIDLE-SAILER MANFRED DIPL IN
IPC: E04G9/02
Filed: 1988-06-30
Abstract: The steel frame profile for frame shutterings is configured as a rectangular profile and has, in the vicinity of the bottom profile wall, a lateral continuation or a bead for the engagement of connecting clamps which channel the clamping forces in the region of the bottom profile wall, as a result of which deformation of the inner wall of the profile is prevented.
Patent DE-3826731-A1 (DE)
Title: Device for clearing explosive bodies
Inventor: KRUESSMANN PETER DIPL ING
IPC: F41H11/16
Filed: 1988-08-05
Abstract: A device is described for clearing an explosive body by means of an explosive charge which is detonated to clear said explosive body. In this case, the device has a tubular body which is used to accommodate the explosive body, is open at its ends and is provided with an appliance for accommodating the explosive charge. <IMAGE>
Patent DE-3842555-A1 (DE)
Title: Device for the fluid-tight closure of building openings, tank (basin) openings, air-lock openings or the like
Inventor: SCHERER LOTHAR
IPC: E02B15/06
Filed: 1988-12-17
Abstract: The invention relates to a device for the fluid-tight closure of building openings, tank openings, air-lock openings or the like, for example for retaining contaminated extinguishing water, having a shut-off element which can be introduced between two spaced-apart receiving means and can be fixed in a sealing position by means of a locking device. In order to achieve secure and rapid closure of the respective opening in the event of danger, the locking device exhibits, in the end-side regions of the shut-off element, in each case at least one bolt which can move between an open position and a closed position and which is designed in order, in the closed position, to exert, in interaction with an associated engagement opening on the respective receiving means, a lateral and essentially vertically downwardly directed sealing force on the shut-off element. Preferably, the bolts can be displaced between the open position and the closed position, essentially parallel to the longitudinal axis of the shut-off element, and assume, in the open position, a position which is arranged upwardly and laterally offset relative to the respectively associated engagement opening, with insertion slopes formed in the region of the bolt ends.
Patent DE-3900987-A1 (DE)
Title: Fluid-actuated transmission clutch
Inventor: STRAUB STEFFEN DIPL ING
IPC: F16H61/12
Filed: 1989-01-14
Abstract: The invention proposes a fluid-actuated transmission clutch. This clutch is usually controlled automatically by means of an electronic system. If the electric power supply fails, an emergency device (21) comes into action and, with mechanical operation by means of a 3/2-way valve (22), this supplies the working chamber (3) of the clutch operating cylinder (1) with pressure medium, thus allowing the clutch to be actuated in emergencies. When the system is intact, a valve (13) with a diaphragm closing element (16) having differential effecting areas ensures that the passage (14) for pressure medium stemming from the emergency device (21) reamins sealed and firmly closed. If the power fails, the valve (25), the emergency device (21) and the valve (13) ensure that the working chamber (13) is vented. The transmission clutch is intended for motor vehicles with an automatic gearbox. <IMAGE>
Patent DE-3902002-A1 (DE)
Inventor: ERLENBACH HANS
IPC: B29K105/04
Filed: 1989-01-24
Abstract: In the manufacturing of substantially dry articles of an expanded thermoplastic synthetic material, during heating-up of the mould wall parts by means of steam, an air pressure which is equal to or slightly higher than the pressure of the steam used for heating-up is maintained in a mould cavity filled with preexpanded synthetic-material particles and connected via passage-openings to the steam chamber. Once the mould wall has reached the temperature of the saturated steam, the air pressure is lowered for fusing of the expanded synthetic-material particles, and the synthetic-material particles are heated to the temperature necessary for fusing or sintering by the steam flowing in. An apparatus (10) suitable for carrying out the method is to have at least one connecting line (30) which leads from the mould cavity (17) to the outside of the foaming device and is provided with a connected valve-controlled operating line (37), in order in this way to introduce compressed air for building up the counterpressure in the mould cavity and for sucking out steam. At least one of these operating lines can accommodate the means (31) for filling the mould. 
<IMAGE>
Patent DE-3908960-A1 (DE)
Title: Ballpoint pen
Inventor: BOCK SEN MANFRED DIPL ING
IPC: B43K29/00
Filed: 1989-03-18
Abstract: A ballpoint pen is proposed which, as a result of its round, ergonomic design, guarantees a secure grip between the curve of the index finger, the thumb and the middle finger and is characterised both by simple construction and handling and by large, interchangeable advertising surfaces.
Patent DE-3913188-A1 (DE)
Title: Laser resonator
Inventor: DU KEMING DIPL PHYS
IPC: H01S3/081
Filed: 1989-04-21
Abstract: A laser resonator, in particular for carbon dioxide lasers, having two resonator end mirrors which have active material between two fully reflecting end-mirror surfaces, which form an unstable resonator cavity, and having at least a third fully reflecting mirror surface by which the laser radiation is reflected before it is coupled out through an output-coupling opening of the resonator. In order for the laser to make do with a reduced output-coupling factor and/or to have an improved beam quality, it is designed such that at least one stable resonator cavity is present between the two end mirrors, in addition to the unstable resonator cavity, and such that the stable resonator cavity additional to the unstable resonator cavity is formed in the same active material by the third mirror surface as the end-mirror surface of one of the two end mirrors, together with the end-mirror surface of the other end mirror.
Patent DE-3913408-A1 (DE)
Title: Di:phenyl ether or sulphide cpds. used for treating plastics - with di:phenyl- or di:cyclohexyl-methane or di:phenyl-propane gps. before dyeing in aq. soln.
Inventor: SIEGEL ROLF DR
IPC: D06P1/651
Filed: 1989-04-24
Abstract: In dyeing plastics (I), esp. g (I) contg.  diphenylmethane, dicyclohexylmethane or 2,2-diphenylpropane gps., with water-sol. dyes (II), (I) are first pretreated with a soln. or suspension of substd. diphenyl ether or sulphide cpds. of formula (IIIA) or (IIIB) and then dyed with an aq. dye soln., both compsn. being applied by dipping brushing or spraying. In formulae, A = O or S; R' and R" independently = one or more OH, amino, carbamino, carboxyl, carbonyl, thio, sulphonyl, sulphochloride, sulphate, phosphate, NO2 or quat. ammonium gps. or existing salts of these gps.; R"' and R"" independently = H or 1-6 C alkyl, alkoxy or alkylol gps., opt. substd. by OH, amino, oxo, thio, carbamino, carboxyl, carbonyl, sulphonyl, sulphochloride, sulphate, phosphate, NO2 or quat. ammonium gps. or existing salts of these gps.. USE/ADVANTAGE - Thee process uses water or aq. solns., rather than flammable or environmentally harmful solvents.  It is useful for dyeing linear or crosslinked polyurethanes prepd. from e.g. 4,4'-diaminodiphenylmethane, diphenylmethane 4,4'-diisocyanate, 4,4'-dicyclohexylmethane diisocyanate or diaminodicyclohexylmethane; phenolic resins, e.g. phenol or cresol resols, resitols or resites; polyamides prepd. from diaminodicyclohexylmethane adipate; poly-p-xylylene polyesterimides, polybenzoaxindione; and polycarbonates, polysulphones, exposides or phenoxy resins contg. 2,2'-diphenylpropane gps. These can be in various forms, e.g. foam, granules, films, fibres gels, lacquer raw materials etc.
Patent DE-3918013-A1 (DE)
Inventor: SCHARF HELMUT DR
IPC: C01G25/02
Filed: 1989-06-02
Abstract: 2.1 Substantial disadvantages of previously practised processes for the preparation of zirconium dioxide powder are the use of aqueous solutions and the separating-off of precipitates. In addition, the process products often do not show the desired flow, compacting and sintering properties, due to the lack of microcrystallinity. 
<??>2.2 A stabilised or unstabilised zirconium dioxide powder having good properties can be prepared without using the disadvantageous process measures by melting zirconyl chloride, if desired, together with a stabiliser, or the precursor of a stabiliser, in the presence of a diol of the general formula HO - X - OH, in which X represents a saturated hydrocarbon radical having 2 to 5 carbon atoms, evaporation of water and hydrogen chloride, calcining of the reaction product at elevated temperature in an oxygen-containing gas and, if desired, milling of the calcined residue. 
<??>2.3 The stabilised or unstabilised zirconium dioxide powder is suitable for the production of sintered articles which can be exposed to high mechanical and/or thermal stress.
Patent DE-3921731-A1 (DE)
Title: Different standard TV signal evaluator - has circuit deriving synchronising pulses, for horizontal synchronising pulse from TV signal pulses
Inventor: FRANZKE WOLFGANG DIPL ING
IPC: H04N9/64
Filed: 1989-07-01
Abstract: The TV standards have a known sync. signal pattern.  A circuit derives a synchronisation pulse (SA) and processes the TV signal pulses (ZX) for deriving a horizontal synchronising pulse (SYNCH). The latter controls a counter circuit (Z), coupled to a counter decoding circuit (DEC), deriving comparison signals from the state of the counter circuits. Various swtiches supply the synchronising pulse, the TV signal pulses, or the output signals of other switches for mutual output signals, used for processing the TV signals.  Pref. a clock pulse generator (T) is used for cycling the cynchonising pulse derivation, the counter circuit, and the various switches. ADVANTAGE - Low-cost design, suitable for TV signals of different, known line duration, image frequency and sync. signal configuration.
Patent DE-3923372-A1 (DE)
Title: Hand scraper for cleaning hardened material from wheel rims - is double ended with chisel at one end and claw at other end
Inventor: GABER ROLF D
IPC: B25B33/00
Filed: 1989-07-14
Abstract: The hand-scraper is used for cleaning the hardened mud or other material from wheel rims. Essentially a straight instrument (1) with a wedge shaped end (3) which screws into the end of the handle (2) lengthwise with an axial dowel screw (5). At the other end of the handle (2) an interchangeable claw (4) is screwed into a recess on the handle (2). USE/ADVANTAGE - The tool is equipped to remove hardened material from crevices and recesses in a vehicle wheel rim.
Patent DE-3929452-A1 (DE)
Title: Potential-less current measurer suitable for monitoring and protection - comprises magnetic field ring sensor with substrate having central opening for current conductor
Inventor: DISSELNKOETTER ROLF DIPL PHYS
IPC: G01R15/20
Filed: 1989-09-05
Abstract: The current measurer has a circular central aperture to accommodate a current conductor. The ring sensor (4) is formed from ferromagnetic, single element, magnetic field sensors (5) with their magnetism set vertically to the direction of the circumference of the conductor and is based on the magneto-resistance effect. The sensors are connected in series and are set radially or axially w.r.t. the conductor. The sensors can be additionally magnetised by a circular pre-magnetising coil with an iron core arranged around the conductor. The useful magnetic field arising from the current flowing through the conductor causes the ohmic resistance of the ring sensor to change. This is evaluated for use as a current measuring signal. USE/ADVANTAGE - Monitoring and appts. protection for electronics, drives and l.v. power applications. Can be used in magnetically ''raw'' environment i.e. where interference from foreign magnetic fields can be encountered. Suitable for miniaturisation.
Patent DE-3934905-A1 (DE)
Inventor: SCHUSTER-MORATH WINFRIED
IPC: F26B3/28
Filed: 1989-10-19
Abstract: Prior art driers and especially intermediate driers still take some considerable time to dry the various items (7). In order to shorten drying times considerably and improve the drying process, it is proposed according to the invention to arrange the necessary lamps (F, G, H) in a drier array in a mutual grid pattern whereby, if tubular lamps (F, G, H) are used, they are preferably arranged in staggered array in two planes. The drier is particularly suitable for drying printing inks.