baber/WOPTO huggingface dataset:
Patent DE-4112676-A1 (DE)
Title: Low-voltage AC-DC converter - has push-pull synchronous rectifiers in series with square-loop saturable-core elements which establish max. short-circuit current limit
Inventor: GRUENING HORST DR
IPC: H02M7/217
Filed: 1991-04-18
Abstract: On the sec. side of a high-frequency transformer, two saturable-core synchronous rectifiers (2.1,2.2) are arranged in push-pull configuration and followed by a free-wheel diode (6) and low-pass LC filter (3). The rectifiers (2.1,2.2) are driven by commands from a gate unit (5) whose requirements as to precision are less rigorous, since both rectifiers are in the conductive condition simultaneously for the duration of a given interval. USE/ADVANTAGE - In off-line power supplies. Simplified gating is achieved with fewer losses on account of shortened switching time with less inductive sec. winding.
Patent DE-4115145-A1 (DE)
Inventor: SCHUERLE HERMANN
IPC: H04N13/00
Filed: 1991-05-08
Abstract: The visual testing system consists of polarisation spectacles (14) having different polarisation axes with or without quarter-wave foils of the two polarisation lenses in front of the eyes of the person being examined, and a visual testing instrument for generating light having a specific polarisation direction, or specific direction of turning or rotation of the circularly polarising light. The visual testing instrument consists essentially of two polarisation filters (10, 12) and two LCD displays (11, 13) which are arranged in an alternating fashion. This arrangement is capable of influencing the light coming from a light source (8) in such a way that visual signs or parts thereof can be seen in a pin-pointed fashion only by one eye, or else by both eyes. If the represented visual sign is to be varied, an appropriate command is passed to a switching device (21) via a keyboard (22) which controls the two drive circuits (19, 20) of the two LCD displays in a desired way. It is also possible to examine the colour-normality of the person under examination, given appropriate modification of the visual testing instrument. <IMAGE>
Patent DE-4119469-A1 (DE)
Title: Printing plate producing machine - presses master copy against blank by compressed air via membrane
IPC: G03B27/04
Filed: 1991-06-13
Abstract: The machine produces printing plates, having a table (2) accommodating the blank (3). The master copy (11) is secured on the latter by a suction frame (5) containing a transparent plate. The master copy is pressed against the blank. This can be done by the frame, which can have a recess int he side towards the table accommodating a pressure medium which is transparent, preferably compressed air. There can be a membrane in the recess, enclosing a pressure chamber, and whose cross-section increases from the centre to the edges. It can be of light-diffusing sheet material. ADVANTAGE - Fast working, and leaves no air bubbles between master copy and blank.
Patent DE-4121541-A1 (DE)
Title: Rudder for wind surfer - has two principal parts of forward fixed element and rear movable element connected to control shaft
Inventor: STRAZZERI LIBORIO
IPC: B63B35/79
Filed: 1991-06-28
Abstract: The rudder consists of a fixed forward element (2), and a rear movable element (3). The fixed element is secured to the board via a housing (5) let into the board and held by screws from the top of the board. The movable element is closely fitted on the two edges (31, 32) to the fixed element. The rear movable element is connected to a control shaft (7), which is in a housing set in the board (6).  The control shaft has a lateral spur (8), which restrains the shafts rotation either way by contacting stops in the housing.
Patent DE-4121955-A1 (DE)
Title: Transmission gear for converting between reciprocal and rotary motion - consists of flat belt with upper and lower stringers
Inventor: HOPPE HANS DIPL ING
IPC: B62M9/00
Filed: 1991-07-03
Abstract: The transmission gear for to and fro movements into a rotational movement is in the form of a flat belt (1) guided by rollers (3-6). Part of the flat belt's (1) periphery encloses the belt pulley (2) at a wide angle. The other part of the periphery is in the form a driveloop (8) consisting of an upper (9) and lower (9') stringer. A to and fro moving driver (7) moving lengthwise in a straight line is near the drive-loop (8). USE/ADVANTAGE - The gear is especially for muscle-power-driven bicycles, exercise machines, wheel-chairs etc.
Patent DE-4123669-A1 (DE)
Title: Intake-controlled reciprocating pump - having pressure medium duct with varying coefficients of resistance
Inventor: RUOFF MANFRED DIPL ING
IPC: F04B1/107
Filed: 1991-07-17
Abstract: A rotor has drillings (21) which contain plungers (22). The drillings act as working chambers and are alternately connected with intake and discharge ducts (16,17) via a pressure medium duct (30). The pressure medium duct is made from two merging sections (31, 32) with differing coefficients of resistance, the section (32) facing the working chamber having the lower coefficient of resistance. USE/ADVANTAGE - A simple and cheap intake control needing no extra moving parts.
Patent DE-4123810-A1 (DE)
Title: Supplementary electronic flash unit for photographic camera - has gating circuit switched between two modes by decision circuit responsive to uncovering of main flash for automatic intensity control
Inventor: PECHER WOLFGANG
IPC: G03B15/05
Filed: 1991-07-18
Abstract: A capacitor (2) is charged from a voltage source (5) and discharged (4) through the flash tube (1) by a trigger circuit (15) incorporating a detector (17) of emission from the integrated flash unit. A photometer (7) operates an electronic swtich (3) to terminate the flash in dependence on the selected screening values (11) and the sensitivity of the film. The dual-mode timed gating circuit (12) between the photometer (7) and switch (3) operates on attainment of a predetermined min. quantity of light. ADVANTAGE - Correct exposure is achieved automatically over wider range of distances achievable with supplementary flash unit.
Patent DE-4127776-A1 (DE)
Inventor: HOURTICOLON ROLAND
IPC: B01J3/03
Filed: 1991-08-22
Abstract: The invention concerns a clasp closure with a hydraulic clamping device and a tie rod (3) which is fixed to the first end (18) of the multi-component annular clasp and passes through the second end (15) of the clasp. When closed by a nut (4) mounted on the tie rod (3), the clasp is held under tension. So that the threaded tie rod (3) is not subjected to high stresses when the clasp is opened and closed, the invention proposes that the clamping device is designed as a double-acting hydraulic cylinder, with piston rod (10), with which the tie rod (3) is detachably connected, and that the casing (11) of the hydraulic cylinder abuts the second end (15) of the clasp.
Patent DE-4132158-A1 (DE)
Title: Opto-electronic identification process - has transmitter and receiver in communication with transponder via reflective signal path
Inventor: BUECHTEMANN WOLF DR
IPC: G07C9/00
Filed: 1991-09-27
Abstract: A transpomder unit (8) is in communication with a read/write station (11) via a laser transmission link (1, 2'). The transponder may be fixed to an object for an individual and has a signal reflector (5) for the laser beam. The transponder has a memory, e.g. EPROM that stores a response sequence. This is coupled to a modulator (10) that can be in the form of a LCD matrix. The power supply for the transponder can be provided by a solar cell (3) that receives an input from a source (6). USE/ADVANTAGE - Improved transmission of identification signals.
Patent DE-4139649-A1 (DE)
Title: Thick-walled plastic tube - obtd. by extruding two tubes vertically down into cooling bath and comprising thick scrap plastic outer and virgin polyethylene@ inner
Inventor: SACHSSE LOTHAR
IPC: B29C48/09
Filed: 1991-12-02
Abstract: The invention relates to a thick-walled plastic tube and a process and appts. for mfr.. The pipe comprises at least two concentric coextruded pipes fused together in the molten state. Ungraded plastic scrap, chiefly polyethylene, forms the external pipe, while the inner pipe is mfd. in virgin polyethylene. Both pipes are coextruded in a vertically downward direction and below the extrusion die is a fluid container which receives the extrudate. By coordinating the densities of the polymer and the fluid in the container, the haul-off of the extruded pipe can be performed under predetermined tension and compression loading to prevent deformation. USE/ADVANTAGE - The process and appts. produce a thick-walled plastic tube, e.g. waste water tube, with adequate properties and reuses scrap polymer from many sources.
Patent DE-4200052-A1 (DE)
Title: Direct current-scavenged two=stroke engine - involves slot in one cylinder connected by channel to slot in other cylinder
Inventor: FISCHER BERND
IPC: F02B75/18
Filed: 1992-01-03
Abstract: The scavenging slots of both cylinders (11, 12) of the engine are connected on each side of the cylinder plane (1a) to a common scavenging air conduit (3). Between the two cylinders, in the region of the cylinder plane, are two union channels (5) sepd. by a narrow bridge (5a),joining directly a scavenging slot of the one cylinder with that of an adjoining cylinder. The union channels are slightly curved, and their curvature central point (5b) is located on the opposite side of the cylinder plane to the channels. When the piston of the one cylinder (12) is at TDC, that of the other cylinder (11) is at BDC, therefore in the middle of the scavenging phase. USE - As a scavenging channel arrangement for a two-stroke engine.
Patent DE-4200941-A1 (DE)
Title: Combination load carrier for surfboard - consists of frame for board retention straps, and frame bars with seat and back rest
Inventor: NAUJOKS VOLKER DIPL ING
IPC: B63B35/79
Filed: 1992-01-16
Abstract: The single-axle boat carrier is for boats, especially surf boards. It has a rectangular frame, with wheels on both sides. The frame is connected to the surfboard via strap retainers. It has lengths of fabric, to serve as the seat and backrest. Holders are located on either side of the frame (2), for straps (31), which engage around the surfboard (1). The longitudinal bars of the frame have, or may be connected to, a seat (17) and a backrest (18). The bars also have a pivot bearing (16). The wheels are removable, the frame may be supported by removeable and-or height adjustable feet (10).
Patent DE-4201763-A1 (DE)
Title: Non-crosslinked expanded polyolefin foam - prepd. by melting polyolefin, mixing under pressure with propane as main blowing agent, and extruding into lower pressure zone
Inventor: PONTIFF THOMAS M
IPC: C08J9/00
Filed: 1992-01-23
Abstract: Largely uncrosslinked polyolefin foam (I) with gel content not above 20% is claimed, contg. (a) a polyolefin moulding material and (b) a blowing agent contg. at least 20 wt.% propane. Also claimed is a polymer compsn. (I) (as above) under a pressure of at least 300 p.s.i., which can be extruded and expanded under atmos. pressure. Also claimed is a process for the prodn. of closed-cell, uncrosslinked foam (I), by heating and melting (a), adding (b) under pressure to form an expandable melt and extruding the melt into a lower-pressure zone to give expanded foam. (I) also contains (c) a permeability regulator to reduce the rate of permeability of propane and thus prevent the foam collapsing, pref. a partial ester of long-chain fatty acid with polyols, higher alkylamine, fatty acid amide and/or unstad. carboxylic acid copolymer, esp. pref. glycerol monostearate and/or distearate; (b) contains at least 50 (pref. at least 90) wt.% propane; (I) is in the form of film 0.397 mm-1.27 cm thick, or sheet 2.54-15.24 cm thick; (a) is poly-propylene or -ethylene (PP or PE); (I) contains 1-15 wt.% propane and 85-99 wt.% (a); pref., the melt is mixed with 0.1-2 wt.% (c) (w.r.t. amt. of melt), then liq. propane is added at 1000-4000 p.s.i., and the mixt. is cooled to a suitable temp. for blowing (107-110 deg.C). USE/ADVANTAGE - The invention enables the prodn. of stable, expanded polyolefin foam using a non-CFC blowing agent which escapes relatively quickly without the foam collapsing; the foam requires no `ageing' or stripping to remove the highly inflammable blowing agent (contrast prior-art systems).
Patent DE-4204870-A1 (DE)
Title: Disposing of soil or water loaded with arsenic - by passing soln. through anion exchange resin, eluting resin to recover arsenic, sepg. arsenic from eluate and regenerating resin
Inventor: RIETZLER JOHANN DR
IPC: B01J41/04
Filed: 1992-02-18
Abstract: Disposal of soil or water loaded with As involves (a) transferring the As cpds. into an aq. soln., (b) treating the aq. soln. of anionic cpds. of As with an anion-exchange resin, (c) eluting the As-loaded resin with an eluant to recover a soln. contg. As, (d) regenerating and conditioning the resin with a buffered slat soln., and (e) processing the As-loaded eluant to separate and recover the arsenate ion and/or the As. The pH and opt. the ion strength of the aq. soln. are adjusted, before treatment with the resin, by addn. of a base, acid or buffer. Treatment with the ion-exchanger is in an ion-exchange column, and is preceeded by filtration, esp. on active C, to remove particles and organic impurites. The anion-exchanger is pref. a polystrene crosslinked with divinylbenzene. The As-lean soln. from the anion-exchanger is treated with a cation-exchanger, to separate metal cations, esp. Cu(+), Cu(3+), Ag(+), Au(+) and Au(3+), opt. after adjusting the pH of the soln., by addn. of acid, alkali or buffer, to a value suitable for adsorption of metal ions on the cation-exchanger. The As cpd. to be removed is an arsenate anion. ADVANTAGE - There is no As-contg. waste to be disposed of. The process is simple, may be continuous and automatic, and allows for the isolation of pure As, for use, e.g. in special glasses and as dope on semiconductors, and a soln. with greatly reduced As content, which can be concentrated and recycled, or disposed of.
Patent DE-4206710-A1 (DE)
Title: De-watering sludge using optimal procedure for different dry-matter contents - where circular filter troughs rotate past sludge inlet and outlet, and sludge is subjected to filtration and vibration and is compressed by pressure plates
Inventor: KASTEN HEINZ
IPC: C02F11/12
Filed: 1992-03-04
Abstract: In a new device and procedure for de-watering sludge, the sludge is treated in accordance with its consistency or dry-matter content with the most effective de-watering process for this condition, whereas previous de-watering procedures have made use of only a single process. USE/ADVANTAGE - Esp. for de-watering sewage sludge. Mfg. costs are low, a high degree of de-watering is achieved, and standing and filling periods are kept to a minimum
Patent DE-4208765-A1 (DE)
Inventor: ALTES BALANA JOSEP MA
IPC: H05K3/34
Filed: 1992-03-19
Abstract: A process for the production of service boxes comprised of a set of PCB's to which have been inserted and soldered the corresponding electrical components is characterised in that the production process includes at least some of the following: forming the printed conductors, insertion of conductive bridges, insertion of short pins and long pins in apertures in the PCB's, soldering of the short pins and long pins, checking the printed circuits, bending or angling of PCB's by milling of bases, "sewing" of PCB's along perimeter edges, assembly of covers and fuses, final checking and encasing. Details of the bridges, pins, PCB's, connectors and fuses are given.
Patent DE-4212969-A1 (DE)
Inventor: ESCHWEY MANFRED DR
IPC: B29C49/46
Filed: 1992-04-18
Abstract: For producing barrier layers on the surfaces of thermoplastics, the surfaces are exposed to the action of a fluorine-containing treatment gas. The barrier layers are effective against mixtures of polar and non-polar substances, for example methanol-containing fuels. To improve the barrier effect, the treatment gas is allowed to act in a cooled state on the surface, whose temperature at the commencement of the action is kept at 60 DEG C to 250 DEG C. 
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Patent DE-4213065-A1 (DE)
Title: Self-identifying physical or physiological telemetering system - includes implanted double-resonant transponder switched to receive strong power supply signal and transmit weaker measurement signal in turn
Inventor: KOSTER NORBERT H L DR ING
IPC: G08C17/04
Filed: 1992-04-21
Abstract: The telemetering system identifies untethered animals are identified unambiguously and e.g. their body temps. and pulse rates transmitted over distances of centimetres to hundreds of metres from the transponder implanted into each animal for wireless transmission to a stationary processor. The transponder incorporates a tapped coil wound on a ferromagnetic core in a reactance circuit which resonates alternately at two frequencies for reception of HF energy from a generator and for transmission of the HF modulated signal. USE - In animal-feeding on demand with automatic medication, process control in foodstuff and pharmaceutical industries, and monitoring of ovulation for animal-breeding purposes.
Patent DE-4220973-A1 (DE)
Title: Plastics rolling bearing cage - has resilient connecting sections between end faces of cage to avoid premature breaking
Inventor: HEEMSKERK RUT
IPC: F16C33/46
Filed: 1992-06-26
Abstract: The two end faces which make up the axially aligned slit in the non-installed position are connected together by moulded elastic sections (12) which can be undulating with their troughs (16,17) and peaks (14,15) opposite one another. At least one position (6) starting from the end sides (10) the cage has incisions (8) and between these a circumferentially rigid connector (11).  Circumferentially on one or both sides next to the incisions there is a recess (9) extending over the width of the cage and defining the elastic sections. ADVANTAGE- The cage can be economically mass produced by casting and has a longer service life.
Patent DE-4223625-A1 (DE)
Inventor: SCHWOTZER GUENTER
IPC: G01D5/26
Filed: 1992-07-17
Abstract: A fibre-optic sensor working according to the Fabry-Perot principle has an open capillary piece (5) into which at least one optic fibre (1) is inserted in such a way that its inserted end surface forms with an optic reflecting surface a gap with parallel faces perpendicular to the axis of the fibre. The optic fibre (1) is designed as a multimode fibre and has a numeric aperture lower than 0.2.
Patent DE-4225758-A1 (DE)
Title: Controller having host computer with fuzzy logic coprocessor and knowledge based memory - has knowledge stored in memory and accessed by descriptions to provide data and rules for use by system
Inventor: EICHFELD HERBERT DIPL ING
IPC: G06N5/04
Filed: 1992-08-04
Abstract: The controller has a host computer (MC) coupled to a fuzzy logic coprocessor (FLC) and a knowledge base (KBM) memory. The fuzzy logic coprocessor has a control register (CREG) that contains addresses to locate a knowledge base descriptor in memory. The descriptors provide a start address for input variables, a start address for output variables and a start address for sequence of rule segments. The fuzzy logic coprocessor uses the rules accessed to provide values that are used by the main computer unit. ADVANTAGE - Provides efficient use of memory unit.
Patent DE-4238918-A1 (DE)
Title: Glass pressing plug with thin skin
IPC: C03B11/10
Filed: 1992-11-12
Abstract: Glass moulding plug has a thin e.g. 0.3-0.5 mm thick skin which, because of 0.3% heat and 0.2% tension expansion, is sepd. from the core plug by a pressure medium after or shortly before the plug comes to rest. Pressure medium is supplied through bores (2,3,7) also for removal of heat and thus removal of deformation after the plug is sepd. from the glass.
Patent DE-4243576-A1 (DE)
Title: Inductive sensor used in automobile
Inventor: SKARPIL HARRY
IPC: H01F5/02
Filed: 1992-12-22
Abstract: The inductive sensor has a dished housing (1) with an opening (10) receiving a permanent magnet (7) between 2 pole shoes enclosed by a circular cross-section coil (14) carried by a coil former (12). The packet (6) provided by the permanent magnet and the pole shoes has a rectangular cross-section, with the coil former fitted around it and having a slot in its inner mantle surface receiving a projection (11) extending from the base (2) of the housing.Pref. the projection engages the permanent magnet and pole shoe packet on the opposite side to that engaging the inner mantel surface of the coil former.
Patent DE-4302292-A1 (DE)
Inventor: WESSELS JOSEF
IPC: G01R31/04
Filed: 1993-01-28
Abstract: The invention relates to a testing apparatus for alternatively displaying an electric voltage or the current passage through an electric conductor, having two hand grips (1a, 1b) connected to each other via a cable (3) and each provided with a probe (2a, 2b), having a measuring circuit and at least one display element (4, 5) for the detection and display of the voltage value present on the probes (2a, 2b), and having a voltage source for the provision of the current necessary for the measurement and display of the current passage. In order to provide a universally usable testing apparatus for the alternative display of an electric voltage or of the current passage through an electric conductor, which can be operated completely without maintenance over its complete lifetime, it is proposed that the voltage source is designed as a solar cell (9), which generates the voltage necessary for the operation of an LCD element (6) as a display element for the current passage. <IMAGE>
Patent DE-4306698-A1 (DE)
Title: Case for receiving a set of push-on wrench-type workheads
Inventor: RIESS GERHARD
IPC: B25H3/02
Filed: 1993-03-04
Abstract: In a case for receiving a set of wrench-type workheads (7 to 10), in particular ratchet heads, which are assigned to an actuating lever (6) fitted with a push-in spigot (11) and whose push-on ends (12) in each case have a receptacle (13) for the push-in spigot (11), a high package density and convenient removability of the workheads (7) are to be achieved. To this end, the case is fitted with a false bottom (3) onto which the workheads (7 to 10) can be laid on one flat side and which is provided, in the region of the push-on ends (12) of the workheads, with recesses (15) or depressions which are wider than the push-on end (12) of the assigned workhead and into which the push-on ends (12) can be pressed down by pivoting up the head ends of the workheads (7 to 10). <IMAGE>
Patent DE-4308411-A1 (DE)
Title: Interferometer of integrated-optical construction
Inventor: VENGHAUS HERBERT DR RER NAT
IPC: G02B6/126
Filed: 1993-03-12
Abstract: In interferometers with ridge waveguides of different path lengths and identical cross-section, constructive/destructive interferences for the transverse electric (TE) and the transverse magnetic (TM) components arise, slightly shifted in terms of wavelength. This phenomenon leads to unwanted crosstalk. This functional dependency on the polarisation is avoided with simple means and high accuracy already during the structuring by designing the longer waveguide (3) with a greater ridge height (H) in the interferometric region (4). There, the TE and TM components propagate with another difference in terms of their propagation speeds than in the case of a smaller ridge height (h). The desired phase positions of the two TE or TM components of the partial beams result from the difference in path length of the two waveguides, but in addition also the desired phase position between the TE and TM components of the partial beam which is guided in the waveguide at varying ridge heights (h, H). Such polarisation-independent interferometers can be used, for example, as a wavelength filter, as a hybrid network in the access connection element of an optical telecommunications system, etc. <IMAGE>