baber/WOPTO huggingface dataset:
Patent DE-4039104-A1 (DE)
Title: Semiconductor device prodn. by etching deep groove around device - except under lead to minimise leakage current
Inventor: KOENIG ULF DR ING
IPC: H01L21/203
Filed: 1990-12-07
Abstract: Prodn. of a semiconductor device involves growing planar monocrystalline semiconductor layer(s) on a prestructurised substrate and providing contact(s) and lead(s) on the surface.  The novel features are that a structurised  masking layer (5,51) is produced on the planar surface, covering the monocrystalline device zone (3,31, 32,33) and the lead; and a deep groove (6) is egched around the device, except at the position of the lead. Etching is carried out so that the edge of the masked area is etched more strongly than the zones further from the edge, pref.  by a wet process. Grooves pref. are etched along the edge of the lead at the same time. The structurised masking layer consists of metallic conductor, which remains on the planar surface of the finished device as lead and/or contact. In the area around the device, the surface layer consists of low ohmic material and the layer under this of high ohmic material. The low ohmic laye is removed in the unmasked areas, pref. in another etching stage; and another passive device is produced on the exposed high ohmic material. After etching the groove, it is also possible to coat other semiconductor layer(s) on the exposed high ohmic material, opt. after growing on oxide layer. The lead and/or contact are produced from silicides. The semiconductor layer(s) of the device and surrounding material are grown by differential epitaxy, pref. mol. beam epitaxy. ADVANTAGE - Leakage currents are very small.
Patent DE-4039432-A1 (DE)
Title: Industrial sewing machine - has swivelling pressor foot mechanism with auxiliary spring tension
Inventor: KLUGE PETER
IPC: D05B29/02
Filed: 1990-12-11
Abstract: On an industrial sewing machine the presser foot has an auxiliary and adjustable spring action working in conjunction. Pref. the sewing machine head contains the needle drive and the presser foot mechanism. The presser foot is held on the end of an arm which can be swivelled away from the stitch point. It is held on the pin held in the stud at the other end of the arm. This can only be moved when the fork is lifted by the release connected by the rod which has spring pressure to hold it. In a tube alongside and at the back of the forked rod, another spring exerts pressure to supplement the spring action on the foot. The point presses on the arm to hold the alignment steady as the presser foot moves in conjunction with the cloth advance mechanism in the machine table. When the presser foot release is raised, the fork is lifted clear of the arm and at the same time a pin on the fork contacts the shoulder of the tube thus releasing the spring pressure. ADVANTAGE - The presser foot is held steady at high speed working, which allows lightweight material to be seamed in a straight line.
Patent DE-4039492-A1 (DE)
Title: Tubular kaleidoscope insert - is formed as disc-shaped hollow body with two enclosed, differently coloured unmixable fluids
Inventor: EWALD ALFRED
IPC: G02B27/08
Filed: 1990-12-11
Abstract: In the disc-shaped hollow body (9) are fitted one or more fluid storage chambers (8), whcih are arranged inside the kaleidoscope in the intermediate hollow space between an angle mirror (3) and the kaleidoscope tube (1). Such chambers are formed as long tubular hollow bodies arranged at approximately 90 deg. to the dis-shaped hollow body (9). The contour of the disc-shaped hollow body matches that of the surface enclosed by the angle mirro (3). Since the angle mirror is triangular (3), the disc-shaped hollow body has the same contour, with two projections (6) which extend over the triangle (3) and in which the fluid storage chambers are provided. USE - As an insert for a tubular kaleidoscope.
Patent DE-4041846-A1 (DE)
Title: Forklift truck with laterally adjustable tines - has integral T=shaped blocks sliding in cross rails on front of fork slide
Inventor: KAUP OTMAR
IPC: B66F9/14
Filed: 1990-12-24
Abstract: The fork slide (1) has upper and lower cross-rails (4, 5) with T-section slots in which slide T-shaped blocks (6) integrally attached to the upright of the tine (8, 9). The pair of times is mounted on the fork slide in this way, and each can be moved along the cross-slide by a horizontally mounted cylinder driving onto a bracket (16, 20). A further version of the invention also has rear facing slots permitting bodily lateral movement of the time pair in addition to individual time adjustment. ADVANTAGE - Compact, rigid and low weight design. Easy to manufacture.
Patent DE-4042095-A1 (DE)
Title: Pipe inspection carriage transmission - has torsion dampers and slip clutches between motor and wheels
Inventor: BURGMEIER HORST
IPC: B60K5/08
Filed: 1990-12-28
Abstract: The torque transmission from a drive (1) to the drive wheels (6) in pipe-inspecting carriages consists of one or more torsion pieces (7) and slip couplings (8) being fitted between the drive and the drive-wheels (6). The drive torque is transmitted upwards via the torsion pieces (7) or slip couplings (8) and spur gears (2) onto a lengthwise axle (3), pair of bevel gears (5), drive axles (4) onto the drive wheels (6). USE/ADVANTAGE - The camera carriage for inspecting pipes has a large diameter of drive wheel and better friction between it and the pipe wall.
Patent DE-4103576-A1 (DE)
Title: Automatic analysis by titration - with titration unit cleaning regulated according to titration measurements
Inventor: KRAH ROBERT
IPC: G01N31/16
Filed: 1991-02-06
Abstract: (A) In an automatic analytical process, in each analysis operation of a series of analyses at preset intervals, samples are taken, fed to a titration unit, titrated and discharged, the titration unit then being cleaned before a new sample is analysed. The novelty is that the cleaning operation is regulated according to the measurement results. (B) Automatic analytical appts. includes a sampling device (10) for controlled taking of a sample from a process, a titration unit (11,12), a dosing device (16) for supplying titration reagent and for giving a titre signal, a measuring device (14, 15) for providing a titre measurement signal and a cleaning device (17, 18) for cleaning the titration unit (11, 12). The novelty being the provision of an evaluation unit (19) for controlling the cleaning device (17, 18) in dependence on the measurement signals. ADVANTAGE - Extremely accurate measurements are obtained in extremely short time intervals.
Patent DE-4108402-A1 (DE)
Title: Linear positioning system for heavy machine systems - has coarse movement to stop- with separate arrangement for adjustment of preset stops with high accuracy
Inventor: HALMOS ISTVAN DIPL ING
IPC: G05B19/39
Filed: 1991-03-15
Abstract: The linear positioning system has a toothed belt loop (5) that carries a support element (3) that moves on a guide rod (6). The support has a stop bolt (4) that is retractable. For coarse linear positioning the support element is moved relative to a detector (2). Fine positioning is provided by a rod (8) that has stops (9) positioned along the length. The positions of the stops can be accurately adjusted by a motor driving a threaded bar (12), with an encoder (13) providing accurate measurement. ADVANTAGE - Preset stops provide accurate positioning.
Patent DE-4109787-A1 (DE)
Title: Object identification code marking carrier - comprises rigid button with attached plastics material foil printed with bar code
Inventor: ZIJL SIETZE
IPC: G09F3/18
Filed: 1991-03-25
Abstract: The carrier, mechanically attached to the identified object, comprises a rigid button (2) supporting a plastics foil (4) which is printed with a bar code (1) for optical/electronic code identification, covered by a transparent foil cap. Pref. the bar code is printed via an offset printing process in mirror image on the foil (4) and is covered by a white screen printed layer and/or the rear face of the foil has a white foil layer (5) for improved contrast. USE - Object identification in automatic handling.
Patent DE-4110782-A1 (DE)
Title: Instrument for anglers to indicate when fish are biting - has luminous liq. indicator in tubular plastics container which fits telescopically inside cover tube
Inventor: HENNING GERD
IPC: A01K97/12
Filed: 1991-03-28
Abstract: The instrument is used by anglers to indicate when fish are biting. It is equipped with a light to give an optical signal. The light (4) is of luminous material and has a cover (3) which is directly connected to the line (13). The light (4) is contained in a two part concentric tubular casing (2,3) whereby the inner tube (2) has a void (4') to take the light (4), and the outer tube acts as its cover (3). The light (4) consists of a luminous fluid in a transparent plastics container. USE/ADVANTAGE - Less susceptible to disturbance and is economic to produce.
Patent DE-4113571-A1 (DE)
Title: Camera view finder with viewing field visual display - uses liquid crystal cell with electrodes supplied to define different fields of view
Inventor: NOZAKI KATSUHIKO
IPC: G03B13/12
Filed: 1991-04-25
Abstract: The viewing field visual display is provided by a liquid crystal cell (1) lying in the optical path of the viewfinder.  The liquid crystal cell (1) has a number of configuration electrodes (9,10,11) used to define different fields of view corresponding to different photographic  parameters. The electrodes are supplied with control voltages, for controlling the transparency of the liquid crystal cell.  Pref. the photographic parameter is also displayed. USE - For improving photographic reliability.
Patent DE-4113577-A1 (DE)
Title: Reference voltage circuit for personal computer capacitive discharge switch - uses reference voltage derived from primary side of computers isolating transformer to supply capacitive discharge switch
Inventor: BARTL ARTHUR
IPC: H03K17/955
Filed: 1991-04-25
Abstract: A variable reference voltage produced from a high-resistance variable potential divider (25, 27, 29) is fed to the secondary side (23) of a main isolating transformer (21, 11, 23) via a remotely controlled switch (31). The latter is governed by a relay (39) which ensures that the reference voltage is alternately added and subtracted from the alternating secondary voltage, this being in turn defined by a polarity switching current supplied via a triac (37) connected across the primary circuit. The reference voltage bypasses the PC power supply via two capacitors (73) and fed to a capacitive sensor circuit comprising a discharge plate (47), detector amplifier (51), integrating amplifier (53) and switching circuit (69). When the discharge plate is touched, the rise in potential caused by the stray charge flow to the plate is amplified and integrated to provide a signal to operate the switching circuit. ADVANTAGE - Provides accurate reference voltage that is not subject to variations found in earth/chassis reference circuits.
Patent DE-4116862-A1 (DE)
Title: Mfr. of plastic engaging pieces for washing machine drums - using additional plastic material to surround rod with grooves at rod ends covered with jacket
Inventor: BOLDUAN EDWIN DIPL ING
IPC: D06F37/06
Filed: 1991-05-23
Abstract: The mfr. of plastic engaging pieces made of a material with a high specific density and a melting point above that of the rod-shaped additional plastic substance surrounding it. The pieces are for use in washing machine drums. In the vicinity of each of the two rod ends, the additional substance is equipped with a groove. Each groove is covered by a jacket plane and at least one plane is equipped with a coating which also encompasses the groove. The substance is seized by two forks engaging into these grooves and held in its end position in a first pt. of the injection moulding tool. The forks are guided into a second pt. of the tool, which after the end positioning of the additional substance, is joined to the first pt. ADVANTAGE - The grooves on the rod-shaped substance permit an automatic seizing and positioning of the substance inside the injection moulding tool.
Patent DE-4120481-A1 (DE)
Title: Plastics chain with U=shaped links - is extruded in one piece with offset swivel arms
IPC: F16G13/16
Filed: 1991-06-21
Abstract: The arms (30,34;36,40) of adjoining chain links are offset relative to each other and towards their swivel axes (20,22) and are separated from each other. The swivel axes of the chain are arranged in the area of the abutting points of the bases (50 to 58) of adjoining chain links (50,52;52,54;54,56;56,58). The chains can comprise inner chain links (10,14,18) and outer chain links (12,16) wherein the arms (34,36,42,40) of the outer links swivel along the arms of the inner links. USE/ADVANTAGE - The chains can be made by extrusion and the arms of the adjoining links are then cut out.
Patent DE-4120737-A1 (DE)
Title: New attachment for spraying tunnel walls -  is pivoted to swing from transport position to working position alongside tractor
Inventor: PREIS HANS
IPC: A01M7/00
Filed: 1991-06-22
Abstract: The attachment is for spraying tunnel walls, it can be swung through one 180 deg. from a transport position to a working position where it lies parallel alongside the tractor which pulls it. Its transport position is in line with and behind the tractor, and the change of position is achieved by a forwards or reverse movement of the tractor with appropriate steering. Important characteristics are a console bracket (C), a pivot and coupler (G,F), three rollers (A) and a link arm (E). USE/ADVANTAGE - Tunnel wall spraying device is cheap to produce and is easy and trouble free in operation.
Patent DE-4121338-A1 (DE)
Title: Bi-fuel injector for rocket motor - has diaphragms in buffer vessels coupled to smaller diameter plunger and injection plunger
Inventor: STARGARD SIEGFRIED
IPC: F02K9/95
Filed: 1991-06-25
Abstract: At the opposite end of each buffer vessel (1) to an immersion pipe (4) delivering hydrogen or sulphur dioxide through the layer of liquid (3) is a diaphragm (5), coupled by a guide plunger (8) in the vessel cover (7) to a smaller-diameter injection plunger (9). A radial drilling (13) through the latter connects a feed pipe (14) for one of the media to the injection pipe (15) when the diaphragm is in the topmost position. From the injection pipe a drilling (16) immediately after the plunger leads to a chamber (10) above the latter, being connected to it when pressure from the combustion chamber via a differential-pressure valve on the injection plunger increases. The drilling is shut off from the chamber when pressure is released from the latter by a solenoid impulse valve, working in conjunction with the differential-pressure valve. ADVANTAGE - Ensures sulphur dioxide injection before than of hydrogen and in a greater volume.
Patent DE-4123996-A1 (DE)
Title: Music stand for keyboard instrument - has lower part against which music lower edge locates and upper foldable music rest
Inventor: READ ISOLDE
IPC: G10C3/00
Filed: 1991-07-19
Abstract: The support fillet (3) is fitted to the music holder (3), together with which it can be folded forwards and downwards against the locating part (1), so that the music holder with its music locating surface comes partly, and its support fillet completely beneath the plane running through the locating part surface (1). The locating part comprises a frame (1), and the axis (2') of this frame runs centrally under the music holder (3) with the folding link (2) connecting to the music holder at the level of the front frame rail (1'). The front frame rail (1') has an inclination defining the folded downwards inclination of the music holder (3). USE - As a music holder, partic. for grand pianos.
Patent DE-4125920-A1 (DE)
Title: Operating raster scan oscilloscope for indicating intensified zone - processing numerical values stored in address locations of read-write memory using two modification modes
Inventor: KURIAPPAN ALAPPAT PAUL
IPC: G01R13/26
Filed: 1991-08-05
Abstract: The modification units (70) receive numerical values from the memory store and return numerical values back to the store. The modification units have a first mode in which a numerical value is modified before returning to the store. In a second mode it modifies the value in a way, before returning it to the store. A selection unit (53) is provided for the selection of at least one set of addresses, and the formation of a signal which sets the modification units in the first or second mode, depending on whether a numerical value has influenced the modification units, the value being read out from a location within the set of addresses. ADVANTAGE - Increases information content of display and emulates fluorescent characteristics of analogue oscilloscope. Ensures clear, well-defined reprodn. of signal course on screen.
Patent DE-4130815-A1 (DE)
Title: Flexible bus=bar for electrical energy distribution - has two pivots joining three sections of flat parallel bus=bars, the unit forming 'Z' or 'V' shape
Inventor: HASSELT GEORG VON DIPL ING
IPC: H02G5/00
Filed: 1991-09-17
Abstract: The flexible system of low voltage, high current busbars is made up of two knee-jointed pivots (101) and three jointed sections. Each jointed section consists of a number of parallel flat busbars spaced from each other by insulating packing and retained within a housing of rectangular cross-section. At the pivot points, pairs of bars (the "fixed" bar and the "moving" bar) are held together with an insulating pill box-shaped casing. A common bolt holds the pivot joints together at the required angle to give a Z or U-shape. The middle section can be bent through a right angle and another variant has only one pivot joining a straight and a right-angled section. ADVANTAGE - Simpler transport and packaging. Suitable for negotiating obstacles in conductor path. More elements can be incorporated with one ground element.
Patent DE-4200665-A1 (DE)
Title: HV stabiliser circuit esp. for TV receiver - exploits capacitance of HV cable wound in grooves around casing contg. transporter windings and resistances.
Inventor: GOSEBERG WALTER DIPL ING
IPC: H04N3/19
Filed: 1992-01-14
Abstract: The HV stabiliser control output (Us) of a reference regulator circuit is derived from a high-resistance bleeder (R1) and a relatively low resistance (R2). The control output controls a HV transformer which produces 20 to 35 kV for the anode of a picture tube (7). The required parallel compensating capacitance is formed by the winding of a HV cable (6) around a conductive coating (15) on the outside of a casing (11) contg. the bleeder components (R1a, R1b) and a conductive rubber junction (14) between two tubular lead-ins (12, 13). ADVANTAGE - Capacitance is arranged parallel to high-resistance bleeder so that no encapsulation is necessary and special expensive capacitor need not be used. Outer electrode doubles as transformer screen.
Patent DE-4202814-A1 (DE)
Title: Ground water cleaner - has injector tube within the well tube below pressurised stripping gas
Inventor: HAGER EBERHARD
IPC: C02F1/28
Filed: 1992-01-31
Abstract: In the assembly to clean ground water by stripping with a gas, pref. air, the stripping gas is held under pressure over the injector tube (9) within the well tube (21) rising above the ground water level (GW). The well tube (21) is pref. a cylindrical tube with the water entry at its lower section (7a) with the water outlet (11) at the upper section (7b) below the sepn. zone (2) and above the ground water level (GW). The injector (9), coaxial to the well tube (21), opens under the ground water level (GW). The well tube (21) has a feed tube (7) with a mantle tube (12) of a larger dia. at the upper end (7b) of the feed tube (7). The water entry (6) is at the lower end (7a) of the feed tube (7) and the water outlet (11) is at the lower end (21a) of the mantle tube (12). The upper end (7b) of the feed tube (7) is secured to a cover (19) over the mantle tube (12) with water passages in its walls, or the upper end (7b) of the feed tube (7) is at a gap from the mantle tube (12) cover (19) for the water to pass into its open end (30). USE/ADVANTAGE - The technique is applied to remove light impurities from the well water by a gas which carries them away. The system has a highly effective cleaning action, in a simple assembly, with low energy requirements for the well operation.
Patent DE-4202939-A1 (DE)
Title: Device for removing floating sludge from circular flotation tanks - in which rotating spiral vanes extend from tank centre to walls and convey sludge over tank rim into collection channel
Inventor: EICHLER DIETRICH DR
IPC: C02F1/24
Filed: 1992-02-01
Abstract: In a device for removing floating sludge from the surface of a circular flotation tank (4), the sludge removal elements are in the form of spiral metal plates (7) extending from the centre of the tank to its wall (6) and supported on a rotating frame (5). The spiral plates form tapering spaces between themselves and the tank walls, and the sludge is forced upwards and over the tank rim (9) into a collection channel (10). Vanes (11) attached to the rotating frame extend into this collection channel and assist the flow of the sludge to an outlet opening (12). USE/ADVANTAGE - In the cleaning of industrial and communal waste water etc.. Can be used for tanks with surface areas of up to 200 m2 and achieves a high dry-matter content of the sludge removed.
Patent DE-4204559-A1 (DE)
Title: Limitation of switching voltage on connecting inductive load e.g. compensation reactor coil in AC loop - connecting voltage limiter during high voltage periods and disconnecting during stationary operation of load
Inventor: SLAMECKA ERNST PROF DR TECHN
IPC: H01H33/16
Filed: 1992-02-13
Abstract: The voltage limiter (6) is arranged on the load side of a system switch (2) in a current line (4) from a mains current bar (1) to an intermittent inductive load resistor (5). The voltage limiter (6) is made of resistive material with non-linear current-voltage characteristics. The voltage limiter (6) is electrically conductively connected to the current lead (4) and to earth (9) by a temporary controlled connection. During the operative period of the inductive load (5), this connection is interrupted by a controlled switch (7). The connection is made through the switch (7) during the period when the system switch (2) disconnects the load (5) from the mains (1). ADVANTAGE - Increases efficiency and life of voltage limiter while still effectively and safely limiting voltage.
Patent DE-4205309-A1 (DE)
Title: Prepn. of residual materials from old motor cars - involves sieving to produce fine, medium and coarse fractions, coarse fraction then being passed through several reducing and sorting stages
Inventor: GOLDMANN DANIEL
IPC: B03B9/06
Filed: 1992-02-21
Abstract: After the initial sieving process, the coarse fraction is mechanically prepd. in several redn. and sorting stages, and divided into iron metal concentrate, non-iron metal concentrate and various fuel concentrates. After sepn. of coarse material, the residual material of the medium fraction is sorted into iron metal concentrate, non-iron metal concentrate and various fuel concentrates. From the fine fraction, in a series of several separate sorting stages an iron metal concentrate, a non-iron metal concentrate, a fuel concentrate, and depositable residual material are obtd. Residual material of the medium fraction is joined to the broken-down material flow of the coarse fraction. Sepd. coarse material of the medium fraction is fed to a break-down stage. USE/ADVANTAGE - To sort and prepare for recycling, where possible, material obtd. from old motor cars.