baber/WOPTO huggingface dataset:
Patent DE-2537463-A1 (DE)
Title: Reagent for dental enamel etching process - contg acid and indicator to turn colour in acid pH
Inventor: IBSEN ROBERT LOUIS
IPC: G01N33/50
Filed: 1975-08-22
Abstract: Aq. reagent for etching dental enamel consists of a mixt. of a dental etching acid (I) and an etching indicator (II), which is applied to the surface of the dental enamel to be etched. (II) gives the reagent a 1st colour, before it is applied to the dental enamel, and a 2nd colour, after etching the dental enamel. Used for treating teeth before application of an adhesive restoring material. An impeccable bond can be achieved between enamel surface and restoring material. Process allows dentist to observe progress of etching, end of process and presence of plaque.
Patent DE-2538450-A1 (DE)
Title: Etching polycrystalline silicon film with neutral aq. etchant - contg. iodine and fluoride gives reproducible results
Inventor: BRIEGEL JOSEF
IPC: H01L21/3213
Filed: 1975-08-29
Abstract: Polycrystalline Si (I) films are etched using a soln. of an etchant (II) contg. iodine as oxidant and a fluoride as an oxide solubiliser (III) in demineralised water. Pref. (III) is NH4F and (II) is an iodide, esp. KI or NH4I. The process is claimed for etching a (I) film on a SiO2 substrate. It is esp. useful for the prodn. of multi diode targets with (I) islets for 'Vidicon' (RTM) systems and can also be used in the prodn. of MOD semiconductors or CCD structures. The process is reproducible and allows (I) to be etched without attack of photo or electron resist materials. Very fine structures can be etched. The etching soln. has low toxicity and is relatively safe and does not attack SiO2, since it is almost neutral.
Patent DE-2541235-A1 (DE)
Title: Metal film application to substrate - by mechanical rubbing action in tumbler and bright annealing for boundary diffusion
Inventor: KARRER KORBINIAN
IPC: C23C24/04
Filed: 1975-09-16
Abstract: Thin metallic layers are applied to a substrate of metal, ceramics or plastics, by exposing the latter to a mechanical rubbing action of a coating material in granular or powder form. The substrate is then rinsed to remove excess material and annealed in a controlled inert. Specifically a substrate which may be an alloy of the Permanorm type (50% Ni, 50% Fe) is coated with a thin film of indium powder which is rubbed into the surface. When all loose particles have been flushed away, a bright annealing process causes the indium to diffuse between the grain boundaries of the Permanorm and to produce a layer with a good adhesion. This makes it possible to apply a coating process to material such as indium or gallium which cannot be electroplated. Substances with a low m.pt. can be used for coating. The appts. required is simple and the adhesion between coating and substrate is excellent.
Patent DE-2543554-A1 (DE)
Title: Denture production process using cast resin - uses hard plaster material poured in single operation in mould
Inventor: PLATEUS GUY
IPC: A61C13/00
Filed: 1975-09-30
Abstract: The pattern with the wax denture can be held in a fixed position in the warm water chamber, the plaster then being poured so as to fill it in a single operation, after which the operation is carried out using the cast resin technique. Cavities can be formed in the rear of the pattern for hooking onto the mounting, after which the runners and risers are placed in position. The plaster is poured, the pattern freed from the mounting, and mould and pattern placed in hot water for five minutes approximately. The pattern is separated and the whole scalded, isolated and replaced in position, after which the resin is poured.
Patent DE-2558515-A1 (DE)
Title: (N-3,4)-dimethylphenyl-D-ribamine prodn. - by catalytic hydrogenation of e.g. D-ribonic acid (3,4)-dimethyl anilide
Inventor: SCHOLZ HERBERT DIPL CHEM DR
IPC: C07D475/02
Filed: 1975-12-24
Abstract: Prepn. of N-(3,4-dimethylphenyl)-D-ribamine of formula (I): comprises catalytic hydrogenation in inert solvent at 100-155 degrees C of either (a) a mixt. of 3, -dimethylaniline and/or 3,4-dinitrobenzene and a D-ribonic deriv. (II) (where R' is H or one R' together with R" forms a bond; R" is OH or R'"-O-, or forms a bond with one R'; R'" is 1-10C hydrocarbyl opt. substd. by OH) or (b) D-ribonic acid 3,4-dimethylanilide (III) (I; -C(O)- is -CH2-). (I) is an intermediate to vitamin B2. Process gives good yields, of pure (I) more simply, and economically than prior processes. Pref. catalyst contains Cu and/or CuO. (II) is pref. D-ribonic acid gamma-lactone.
Patent DE-2611221-A1 (DE)
Title: Speed control for 3 phase motor - introduces power supply rotation w.r.t. windings by stationary segmental collector bridged by rotatable phase segments
Inventor: LANDSCHULZE ERNST-AUGUST
IPC: H02P25/12
Filed: 1976-03-17
Abstract: Appts. gives sub and super synchronous speed control to a three phase machine. The machine windings are connected to a stationary segmental collector which is bridged by rotatable phase segments. These in turn are supplied with power through slip-rings. With no phase segment rotation the machine runs at synchronous speed relative to the supply. Turning the segments against machine rotation reduces speed whilst movement with rotation increases speed with respect to the stationary synchronous value. Provided the relative motion is maintained the phase segments may be stationary and the windings rotating.
Patent DE-2613905-A1 (DE)
Title: Miniature glow discharge lamp - has horizontal electrodes in line and resilient side contacts projecting below casing
Inventor: KINDT ROLF
IPC: F21S8/00
Filed: 1976-03-31
Abstract: The miniature glow discharge lamp has a casing (13 or 14) with a lamp (15) enclosed between plates (16) and with its envelope (17) filled with e.g. neon gas and containing two channel shaped electrodes (18) in line mounted on the base which has the evacuation tube (19) extending downwards. These electrodes are situated about half way down the depth of the casing, and are connected by bent strips (20) to the side plates (16). Mounted on the outside of these side plates are the two contacts (21) which project downwards below the base to extend through the bottom (28) of the casing. These contacts have a bend (29) immediately below the side plates, and are resilient, to engage a component with a snap action.
Patent DE-2618487-A1 (DE)
Title: Subscriber stations for telephone systems - have common control unit which stops dialling device when line is changed
Inventor: SONNEMANN MANFRED
IPC: H04M9/00
Filed: 1976-04-27
Abstract: Telephone systems are constructed esp. as serial intercommunication or ante-chamber sets. Individual extensions have access to different extensions lines through separate connecting devices. When dialling equipment e.g. key dialling (WE) with current pulse series dialling, target dialling devices is used with intermediate storage of dialling signals for a connection build-up through one of the extension lines (e.g. LT1-LTn), a common control unit (Ne is used. When a line is changed, control unit automatically stops the dialling device (WE) and possibly erases the stored signals.
Patent DE-2619139-A1 (DE)
Title: Control system for plasma display panel - has switching cell at each matrix intersection point each enabled to establish transverse electrostatic field
Inventor: KNOLL ANTON
IPC: G09G1/20
Filed: 1976-04-30
Abstract: The control system for an image display panel, e.g. a plasma display, comprises a switching cell at each matrix intersection point. Each switching cell has means for providing a transverse electrostatic field and at both sides of each switching cell are means for providing a longitudinal electrostatic field. The two fields are used respectively to accelerate charge carriers in a plane parallel to the display and perpendicular to this plane. Pref. a cathode is positioned adjacent the inputs to each cell and an anode is positioned adjacent the outputs, with the cathode, the matrix and the anode positioned one above the other.
Patent DE-2620263-A1 (DE)
Title: Large dia. pipe made from thermoplastics - where plastic flows along heated bore of rotating pipe mould
Inventor: DORSCHNER OSKAR DR ING
IPC: B29C48/09
Filed: 1976-05-07
Abstract: An externally heated, rotating metal cylinder is used in which grains of plastic are heated to above their m.pt. by the hot inner wall of the cylinder and form the pipe. A cooled metal tube or core is pref. located concentrically in the metal cylinder; this tube is stationary, or may be rotated and is provided with a screw thread via which the plastic pipe is extracted; the thread is followed by a conical zone used to smooth and compact the pastic. The metal cylinder pref. contains an oil cavity ensuring uniform distribution of heat provided by electricity fuel-gas or -oil. The cylinder is followed by a concentric, double-walled cooling cylinder used to cool the plastic pipe. The plastic grains are pref. heated to >50 degrees C before entering the rotating cylinder. Used for mfg. pipe, 500-1000 mm dia. or more from practically all thermoplastics, e.g. PVC, polythene, polypropylene, polystyrene, polyamide. A simple plant with lower investment- and prodn. costs than conventional plant.
Patent DE-2636917-A1 (DE)
Title: Mat for supporting plants on wall - has foam material body with faces covered by grid fixed to frame
Inventor: BOECK ANDREAS
IPC: E04F13/08
Filed: 1976-08-17
Abstract: The mounting is for supporting foam material mats to carry green plants on steep walls or similar surfaces, the mat (1) being enclosed by a frame (5) on its periphery. The mat is covered on the front-and back face with a grating (10) fixed to the frame (5). The frame (5) has a U-profile, which grips over the edge of the front- and/or rear face of the foam mat. The top frame shank (6') has a hollow profile, connected to a water feed line. On the bottom of the box profile facing the mat, then are perforations (15). The frame is fixed via distance pieces (21) at a distance from a wall (20).
Patent DE-2640702-A1 (DE)
Title: Sealing plug for channel carrying several cables - has rubber seal with radial seats and split guide tubes
IPC: H02G9/06
Filed: 1976-09-10
Abstract: The sealing plug is used in cable channels carrying several cables. The plug seals the channel against gas or water. The sealing plug is pref. made from rubber. The sealing plug has several radial cuts (9). The radial cute end in round axial openings of the seal. The sealing plug has press fit components (6) with several semicircular openings (8) open outwards in radial direction. The system has split guide rings (5) which are placed into the seats on the outside circumference of the press fit components (6) and held there. The press fit components (6) have clamping screws (4) which pass through holes of the seal (3), for connecting these components together.
Patent DE-2645273-A1 (DE)
Title: Alcoholic vapours sepn. from carbon di:oxide from wine fermentation - by condensation, to prevent air pollution and allow recycle of condensate
IPC: C12G1/02
Filed: 1976-10-07
Abstract: Carbon dioxide, released from wine and pressed husks in prepn. towers, is freed from alcoholic vapours, partic. those of the higher alcohols and fermentation amyl alcohol in a condenser, mounted on top of the tower. Tubes pass through the deep-cooled condenser and funnels below and above them recycle the condensate. The purified carbon dioxide is discharged at the top. This eliminates air pollution by the vapours entrained by the carbon dioxide. The return of the condensate to the wine raises its titre from 3 to 4/10 degrees and gives it a finer bouquet.
Patent DE-2649792-A1 (DE)
Title: Solar energy collector with lens or mirror focussing - has reflective layer on reverse side of absorber element and corrects for change in incident radiation angle
Inventor: POELL MARTIN
IPC: F24S23/74
Filed: 1976-10-29
Abstract: The energy absorber tube through which the heat transfer liquid flows, lies at the focus of a parabolic mirror. The latter is moveable to correct for the sun-earth relative movement. The absorber is surrounded by a transparent glass tube attached by brackets to the mirror, and moving with it. The rear side of this glass tube, away from the incident radiation from the mirror, has a reflective layer, over an angle of 140 degrees, which prevents energy losses. Increased thermal efficiency and simple construction is obtd.
Patent DE-2650631-A1 (DE)
Title: High efficiency mixer - includes one central axial and one peripheral feed meeting at turbulence centre outside mixer itself
Inventor: HARDT EMIL JAKOB
IPC: B01F5/20
Filed: 1976-11-05
Abstract: A mixer vessel has two feed inlets, one at the centre and one at the periphery, the latter pointing towards the centre. The peripheral inlet is to a system of jets consisting of at least one slit-shaped jet and/or a number of holes or jets close together on at least one plane vertical to the main axis of the mixer; the outlets of these holes jets emerge at the bottom of the vessel into an area outside the vessel walls. System is suitable for mixing gas, liq. and soluble or insoluble solids in any degree of fineness, no energy is lost through friction at mixer walls, the energy used can be easily adjusted as required, it is partic. suitable for liqs. and fine powders (as it eliminates formation of lumps) e.g. in producing flocculating agent soln. contg. polyacrylamide and polyacrylate pptn. in zinc.
Patent DE-2658000-A1 (DE)
Title: Asymmetric non-magnetic parts magnetic sorting system - uses alternating magnetic field which directs parts to different conveyors
Inventor: ZOMMER JURY ARVIDOVITSCH
IPC: B07C5/344
Filed: 1976-12-21
Abstract: Asymmetric, nonmagnetic, electrically-conducting parts are sorted according to the position of th asymmetry, by being fed into an alternating magnetic field (AMF) with an induction vector which is at 90 deg. to the asymmetric plane of the part. The AMF generates electrodynamic forces due to the asymmetry of the part, and the AMF has the same density of both sides of the part, so each part is drawn towards one of two magnetic poles according to the asymmetry. Round discs (7) made of two different metals pass along a conveyor and the discs (7) are asymmetric due to the different conductivities of the metals. Vibrators (9) drive the discs (7) along the inlet track (6), and along an outlet track (8) with two paths separated by a partition. The discs are aligned by passing between the poles of a 'C' shaped electromagnet (5).
Patent DE-2658149-A1 (DE)
Title: Air conditioning duct fire screen flap mounting - has outer heat insulated and temp. resistant frame firmly connected to inner frame
Inventor: HOENMANN WINFRIED DR ING
IPC: E04B1/94
Filed: 1976-12-22
Abstract: The frame is mounted on, and surrounded in its closed position, by a frame pref. made of heat-insulating and high-temperature-resistant material. This frame (17) is in turn surrounded by a second frame (25), and there are connectors (20, 23, 22, 32) to join the frames firmly to each other. This frame may also be made, at least partially, of heat-insulating and high-temperature-resistant material. The space between the frames, and between frames and duct piece (19), may be filled with glass wool or similar heat-insulating material.
Patent DE-2702913-A1 (DE)
Title: Oil shale retorting at superatmospheric pressures - with hydrostatic sealing at both ends of the retort
Inventor: JENNINGS DON CALVIN
IPC: C10B53/06
Filed: 1977-01-21
Abstract: The process is an improvement of the known (e.g. from US 3361644) solids-upflow, gas-downflow retorting technique in which the crushed shale is fed upwards through a vertical retort by a reciprocating feed piston, the bed continuously exchanging heat with a downflowing, high specific heat hydrocarbon recycle gas, The improvement comprises carrying out the process at superatmospheric pressures (pr f. 5-50 psig), the pressure being maintained by a hydrostatic sealing arrangement through which solids are fed into and removed from the retort. Specifically, an elongated, upwardly extending feed conduit is provided which communicates at its lower end with the cylinder in which the feed pump reciprocates, and with the liquid reservoir of oil which accumulates at the bottom of the retort. Pref. a low-pour-point, relatively light fraction of the shale oil product is continuously recycled to the feed conduit to maintain an inventory of oil in it, filling the conduit to the level established by the retort pressure and excluding high-pour-point oil from the shale feed conduit. Operating the process under pressure drastically reduces the volume of recycle gas required, providing savings in recycle gas compressor facilities and improving heat exchange efficiencies.
Patent DE-2705827-A1 (DE)
Title: Electronic locking system with generator key - has frequency modulated carrier wave generator working with signal discriminator circuit
Inventor: PERRON ROBERT RICHARD
IPC: G07C9/00
Filed: 1977-02-11
Abstract: The electronic locking system has a key with a generator producing a large number of frequency-modulated carrier waves, and to which a first induction unit is electrically connected. A lock has a second such unit inductively coupled to the first when the key is in a predetermined position in relation to the lock. A signal discriminator circuit is connected in the lock circuit and compares a predetermined sequence of binary signals with that in the generator carrier wave. If they tally, a drive moves the lock between the engaged and the free position.
Patent DE-2716493-A1 (DE)
Title: Gearbox actuator pressure supply seal - comprises low friction slotted plastics piston rings and laminated steel ones
Inventor: HELMER JOSEF DIPL ING
IPC: F16H57/08
Filed: 1977-04-14
Abstract: The seal is for the pressure supply to the actuators of a motor vehicle gearbox, particularly an automatic one. The medium flows from an annular channel in a stationary diecast aluminium hub into holes in a rotary component; particularly an actuating ram of steel or similar material. Piston ring type sealing rings fit in grooves in the hub on each side of the transfer point. Slotted piston rings (22) of plastics having a low coefficient of friction are used, and between them and the ring groove shoulders on the sides furthest from the channel are slotted laminated steel sealing rings (23), slightly clear of the rotary component.
Patent DE-2717371-A1 (DE)
Title: Fluid sodium or potassium phenyl-glycine salt prepn. - by saponifying nitrile deriv. with mother liquors from alkali hydroxide and amide melts
Inventor: TOLKSDORF ERICH DIPL CHEM DR
Filed: 1977-04-20
Abstract: Fluid alkyl metal salts of phenylglycine and of phenylglycine-o-carboxylic acid are prepd. by (a) the stepwise saponification of the corresponding nitriles with aq. alkaline waste mother liquors, in the presence of aniline, at between 50 degrees C and b.pt. and (b) evaporation of the reaction mixt. The mother liquors are obtd. from alkali hydroxide/alkali amide melts and contain (by wt. wrt mother liquor) 7-30% NaOH/KOH mixt., 20% Na2CO3/K2CO3 and opt. 10% other components, in addition to smaller quantities of coloured components and organic decompsn. prods. The phenylglycine salt is used as the raw material for indigo prepn. Fluid, mixed phenylglycine salts are obtd. which form less dust in use than Na salts, prepd. by saponifying with NaOH solutions. Use of waste solutions reduces environmental pollution.
Patent DE-2719724-A1 (DE)
Title: Selective hydrocracking of hydrocarbon fractions - to raise octane value and obtain natural gas substitute as by=product
Inventor: CYBULEVSKIJ ALBERT MICHAJLOVIT
IPC: C10G45/64
Filed: 1977-05-03
Abstract: Selective hydrocracking of hydrocarbon fractions using molar ratio of hydrogen of 1:2.5-20, under 15-100 kp/cm2 at 280-520 degrees C is effected by use of a 4.5-6.0 A zeolite catalyst ion-exchanged to at least 30% with Cr (III) ions and contg. 0.1-5 wt.% Group VIII metal. Pref. ion exchange with Cr (III) is at least 50% and the catalyst contains 15-80 wt.% inorganic oxide, e.g. Al2O3 or SiO2, as binder to increase strength and resistance to temp. changes. Used for treatment of oil fractions to remove n-paraffins and improves octane or cetane ratings. A wide variety of fractions from light naphtha to oil may be used. The gaseous products from breakdown of the n-paraffins from a natural gas substitute. The catalysts are highly selective and no special equipment is required.
Patent DE-2723415-A1 (DE)
Title: Highly integrated MOS memory units prodn. - is performed so that distances between mask edges in two masks are independent from each other
Inventor: HOFMANN RUEDIGER DR
IPC: H01L21/761
Filed: 1977-05-24
Abstract: The unit (1) is produced by the use of silicon-gate technology, by which troughs are etched in an oxide layer on a substrate, in which switching circuits are produced. Zones between the troughs are produced, in which the substrate is doped through a first mask in order to obtain electric insulation. Then the troughs are etched in the oxide layer using a second (trough) mask. The distance between adjacent mask edges is in the trough mask independent from the distance of adjacent mask edges inside the first mask. It is determined only by the required distance between adjacent troughs, while the mask edges in the first mask are spaced only in accordance with the minimum distance required by the mask production.
Patent DE-2728836-A1 (DE)
Title: Skylight or roof solar energy panel frame sealant - comprises monolithic flexible weatherproof unit, foldable for transport
Inventor: GRAEFF RODERICH WILHELM DR ING
IPC: E04D13/147
Filed: 1977-06-27
Abstract: One-piece sealing frame (7) made of flexible and weather-proof material, has the inside edge of this frame fixed in the upper area of the skylight or solar energy panel frame with sealing battens (9) running round, and its inside edge area can form a sealant in the edge support of the covering pane (5). The cover frame (6) holding this pane can provide lateral cover to the fixture zone of the sealing frame on the window or collector frame. This is easily transported and installed, and suitable for application to installations of any dimensions. It can be transported folded and laid in one piece.
Patent DE-2745586-A1 (DE)
Title: Current supply circuit with switchable transformer tappings - has triacs in primary tap leads, initially made conducting very briefly, and then for longer periods
Inventor: FRANKE HANS-JOACHIM
IPC: H01F29/02
Filed: 1977-10-11
Abstract: Power semiconductor switches (triacs) controlled by a selector switch are inserted into the leads of transformer taps on the primary side. They are controlled by a starting up control circuit to limit the transformer switch on current. The triacs are made conducting during the second half of a half cycle of the voltage to be switched. Conduction is initially only brief, and then longer and earlier. The start up control circuit may contain an automatic element which puts the triac into continuous conduction when the start of conduction point has reached the voltage max. in a half cycle.
Patent DE-2746008-A1 (DE)
Title: Artificial stone for prodn. of light wt. play-bricks - obtd. from a slurry of gypsum, expanded clay, titanium di:oxide and perlite
Inventor: ROSBACH GEB HERBIG HANNELORE
IPC: C04B28/14
Filed: 1977-10-13
Abstract: Artifical stones are produced form a mixt. of about 100 g. gypsum, 60 g. expanded clay of particle size 0.01-2.0mm, 6 g. TiO2 and 60 cm3 of a porous mineral material of mesh size 1.0-3.0 mm. About 80 cm3 of water is stirred into this mixt. to give a slurry which is moulded and hardened. Pref. the mineral material is perlite. Artificial stone is produced which enables play bricks to be simply mfd. with a small specific wt. Drying and hardening time are short.