baber/WOPTO huggingface dataset:
Patent NL-2034407-A (NL)
Title: A digital teaching system based on big data cloud platform
Inventor: TIANJIAO CHEN
IPC: G09B5/08
Filed: 2023-03-22
Abstract: The invention provides a digital teaching system based on big data cloud platform, and relates to the technical field of education and teaching system, comprising a digital teaching platform containing a login system, which further comprises an identity identification system module that includes a teacher end module, a student end module and an administrator end module. The digital teaching system of the invention is based on the network teaching resource database,and the three system. modules of common use module, teaching management module and teacher—specific module are arranged, improving the teaching efficiency of the whole teaching system and facilitating the administrator to manage and maintain the whole digital teaching system.It is convenient for teachers to make targeted teaching, which improves the learning efficiency of students, whereby the network distance teaching mode is more efficient.
Patent NL-6908042-A (NL)
Title: Pile carpet production
IPC: D04H11/00
Filed: 1969-05-27
Abstract: The felt of the pile threads and of the subsequent series are attached to each other by a hardening agent. This is intermittently fed to the pile at its foot after the series of fibres has been pushed in the correct position in relation to the previous series employing a support forming a stationary plateau. The series of pile fibres is intermittently moved in the direction of an intermittently moving conveyor belt where the agent is hardened.
Patent NL-7102116-A (NL)
Title: Directly bonded refractory article
Inventor: DE AZA S
IPC: C04B35/48
Filed: 1971-02-17
Abstract: Directly bonded, basic refractory article consists of a zirconate of an alkaline earth metal which can be present simultaneously with a high temp. resistant solid refractory phase, while a high degree of solids-solids contact with the refractory phase remains in the presence of the liquid phase for the formation of a zirconate bonded refractory skeleton at high temps. Pref. zirconate is calcium zirconate. The zirconate may be produced by baking zirconium oxide and an alkaline earth metal compd. in the presence of a basic refractory material.
Patent NL-7107276-A (NL)
Title: Alumina pellets - by alk silicate, alk aluminate and acid ppt ion spray drying,prewetting and extruding
IPC: B01J2/20
Filed: 1971-05-26
Abstract: An alkaline aluminate, an acidic reagent, and from 0-20% based on the dry wt. of Al2O3 produced of an alkali silicate are continuously reacted in an aqs. mediul while maintaining a pH of from 5-12; filtering the resultant precipate drying at 200-1000 degrees F.; recovering the dry powder; washing the powder prewetting the powder to form a slurry mixt; extruding the slurry mix and recovering the extruded pellet.
Patent NL-7114025-A (NL)
IPC: F16L59/02
Filed: 1971-10-12
Abstract: 1300730 Cold liquefied gas storage tanks CONCH INTERNATIONAL METHANE Ltd 23 Aug 1971 [14 Oct 1970] 48749/70 Addition to 1203496 Heading F4P In a cold liquefied gas, e.g. methane storage tank as claimed in parent Specification 1,203,496 wherein the tank 4 is surrounded by heat insulation material 7 lining the inner face of an outer rigid shell 2, e.g. the inner hull of a ship and wherein the upper less stressed portion B of the heat insulation material is of foamed plastics material, e.g. polyurethane sprayed in situ on the inner face of shell 2 whilst the lower more highly stressed portion C of the insulation is of load bearing material, the latter comprises members C1, e.g. of balsa wood faced with plywood rigidly fixed to and spaced over the shell bottom with the intervening spaces C 2  filled with sprayed-on rigid foam plastics material; the junction planes between C1 and C2 being inclined to the shell bottom. As shown tank 4 rests on pinewood blocks 17 supported by insulation members C1. The insulation material B at each side of the shell 2 which is chamfered is of nylon mesh and polyurethane except at the corners D where the insulation comprises balsa panels held by wood strips 9. The top insulation A comprises fibreglass 21 faced with plywood 22. The tank has ribs 5, a bulkhead 6 and keyforming brackets 18, 19 at opposite sides of blocks 17.
Patent NL-7310431-A (NL)
Title: Yarn package - radial opening through centre enables materials to be removed without trouble
IPC: B65H55/04
Filed: 1973-07-27
Abstract: The former has removable discs on each end with a shallow taper. The material is wound onto the spindle using a guide piece which moves automatically along, to and fro, the width of the spindle, to ensure regular and even distribution of the coils. After the winding operation is completed, the spindle can be collapsed and removed from the coil. The tapered discs on the outside are now pressed flat, to enable the coil to be enclosed inside a container, which has a radial opening through which the material inside can be removed without a wire.
Patent NL-7417025-A (NL)
Title: Portable seed drill - has rod working in pipe to thrust seeds into soil in turn
IPC: A01C7/02
Filed: 1974-12-31
Abstract: The drill comprises a blowpipe-shaped section in two parts sliding in relation to each other. The outer one is fixed to a tapered seed holder (2), and the inner one has a handle coupled to a sliding rod (16). This, together with the tapered holder tip, thrusts the seed into the soil after it has fallen out of the holder. Operation is by lifting and dropping the drill as the operators walks along. There can be a disc (3) fixed to the end of the taper tip, bearing against the ground, the rod thrusting a seed into the latter while a further one is held ready in the holder to drop down in turn.
Patent NL-7500754-A (NL)
Title: Sheet gathering mechanism for printing press - has conveyor passing sheet over braking rollers with suction means
IPC: B65H29/04
Filed: 1975-01-22
Abstract: The mechanism is of the type in which an endless chain conveyor transports each sheet (4) to above the dispensing point (1) where it is released and its forward speed braked by a device (5) which comprises two or more rotary braking rollers (9, 10) arranged at short distance one behind the other in the direction of transport and before the rear edge (6) of the pile of dispensed sheets (1). Pneumatic means are provided to attract each sheet into contact with the braking rollers. For this purpose a suction tube (12) may be provided below the rollers and parallel therewith, the tube having a number of suction bores (17) directed towards the gap (28) between the rollers.
Patent NL-7504195-A (NL)
Title: Biodegradable diphenylalkane insecticides - contg. 1-(p-tert butylphenyl)-1-(p-alkyl or alkoxyphenyl)- alkanes and chloroalkanes
IPC: C07C45/46
Filed: 1975-04-08
Abstract: Biodegradable insecticides contain cpds. of formula (I): (where R is1-3C alkyl or 1-4C alkoxy; and R1-3 are H, Cl or 1-2C alkyl). (I) may be prepd. by reacting tert-butyl benzene with a cpd. ClCOCR1R2R3, in the presence of aluminium chloride, to give an inter. of formula (II), which is reduced, using 'RED-AL' (RTM:Aldrich), to (II: -CO- is -CH.OH-) which is then reacted with R-Ph in sulphuric acid.
Patent NL-7509857-A (NL)
Title: Removal of root and stalk remnants from plant bulbs - using sloping rollers in contact with a moving belt
IPC: A23N15/08
Filed: 1975-08-19
Abstract: The machine has a number of parallel rollers. These can rotate about their longitudinal axes. They are spaced with their outer surfaces closer together than the dia. of an average bulb. A moving band is in contact with the underside of the rollers and moves at right angles to their long axes. The rollers and band slope at the same angle so that all the rollers have their long axes at the same angle to the horizontal. The rollers and/or the moving band are driven and pull the roots and stalks of the bulbs off by trapping them between the band and the rollers. The bulbs are turned by the rollers so that all protruding parts are removed with minimal damage to the rest of the bulbs.
Patent NL-7512975-A (NL)
Title: Pivoted automatically locking mooring slip hook - has spring element which, on impact following opening, returns hook to locked position
IPC: B63B21/58
Filed: 1975-11-05
Abstract: The hook (1) is pivotable about an horizontal axis (7) and in operation returns to the latched position after having been opened. A spring (6) is provided which is engaged by an extension (2) of the hook, the arrangement being such that it absorbs the kinetic energy of the hook on impact and returns this so that the hook pivots back into its latched position. The hook may be held in the locked position by a latch (31) provided with a re-set cam (41) which acts on the hook when this approaches its locked position so as to move the latch into its locked position.
Patent NL-7612895-A (NL)
Title: De-centralised off=line hand-written computer input - uses letters traced by electronic pen on writing surface and displayed for check before recording on tape
IPC: G06V30/224
Filed: 1976-11-19
Abstract: The method is for decentralised, off-line, entry of input data to a computer by a 'handwriting' technique. An input 'message pad' comprises lines built up of a series of square elements, each consisting of a baseplate carrying a pattern of linear and curved conductors, over which any block-style letter of the alphabet or numeral can be traced using an electronic pen. The movement of the pen generates a series of pulses representing an electrical representation of the letter or figure traced out, which is fed to a buffer memory. The contents of the memory are displayed on a screen, and erase and rewrite controls permit the accuracy of the recorded data to be checked, after which the contents of the memory can be transferred to magnetic tape for transfer to the computer input point.
Patent NL-7800478-A (NL)
Title: High yield hydrolysis of acrylonitrile to acrylamide - using a catalyst obtd. by cooling volatilised copper and organic solvent
IPC: B01J23/72
Filed: 1978-01-16
Abstract: A finely divided metallic Cu catalyst obtd. by volatilising Cu, cooling the vapour in contact with an organic solvent and heating to ambient temp. is used for the prodn. of acrylamide from acrylonitrile and water. In an example acrylonitrile is reacted with water at 120 degrees C under nitrogen (up to 70 psi) for 6 hrs. using a catalyst obtd. by vaporising Cu on a liq. N2 temp. controlled wall on which THF is also condensed, heating the prod. to room temp. and removing the THF in vacuo. Conversion to acrylamide = 40%. Acrylamide is a flocculent, paper strengthening agent and additive for tert. oil recovery. Improved yields of acrylamide are obtd. without the attendant worry of disposal of unwanted side prods. or undesirable separation steps. The catalyst is not rapidly poisoned by polyacrylamide formation.
Patent NL-7802693-A (NL)
Title: Feeding workpiece through machine tool - by using support table as stator and workpiece as rotor of linear induction motor
IPC: B23Q7/00
Filed: 1978-03-13
Abstract: The arrangement for feeding a workpiece (3) through a machine tool (1) comprises placing the workpiece on the stator (2) of a linear induction motor and moving it as rotor (linor) with the stator serving as support surface. The workpiece may, in this way, be fed, positioned and secured, e.g. for grinding, sawing or milling.
Patent NL-7808599-A (NL)
Title: Armoured vehicle periscope optical system - has line of sight positively cut off to prevent internal light escaping
IPC: G02B23/08
Filed: 1978-08-18
Abstract: The periscope is particularly for armoured vehicles. IT is designed to prevent their position being given away at night by interior light shining through it. The line of sight (4) between the inside and the outlet (3) outside the vehicle is positively cut off, typically by a shutter (11) movable in front of the eyepiece (2) inside. The system ensures that the line of sight is opened only when the observer or driver in the vehicle has his eye to the eyepiece.
Patent NL-7906290-A (NL)
Title: Protective covering for underground unarmoured cables - is transported as flat tube into which cables are drawn before laying in ground (BE 18.3.80)
IPC: H01B13/10
Filed: 1979-08-18
Abstract: The application is to unarmoured cables laid underground e.g. TV distribution cables. The protective plastics covering is formed from a flat sheet bent about a folding line (20). The two sides (12, 13) thus formed are fastened together, and have a pulling cord (11) included between them. Hinge lines (4) are formed into the plastics before folding. The sheath is transported flat in coils. On site it is unrolled and the cable pulled through by means of the cord (11). The flattened tube readily expands by action of the hinges (4) as the cable is drawn in thus no great effort is required for threading.
Patent NL-8101203-A (NL)
Title: Elbow rest for car driver - has cushion on L-bracket securable to carrier hooked over door window sill and/or stuck to inside of door
IPC: B60N2/75
Filed: 1981-03-12
Abstract: The elbow rest for a car driver comprises a support surface or cushion (2) which is secured or formed on the inside of the door on the driver's side. The cushion may be carried by an L-shaped bracket (1) securable (4,5; 3,9,6) to the door e.g. via hooks (4) on the bracket engaging eyes (5) on a plate (3) which can be suspended (9,6) on the lower horizontal window frame member. The plate (3) may have an adhesive layer for fixing it to the door.
Patent NL-8203691-A (NL)
IPC: D06C7/02
Filed: 1982-09-23
Abstract: In the production of decorated tufted carpet tiles, a tufted carpet web is made by tufting a pile yarn in a substrate, precoating and backing the tufted substrate on the backside, followed by dyeing, imprinting with a pattern, steaming, washing and drying the carpet web, and thereafter by punching or cutting tiles from the carpet web in the process, the carpet web, prior to the dyeing step and preferably after precoating, is heat treated by being exposed to a temperature of 120 DEG -200 DEG  C., preferably 140 DEG -170 DEG  C., for 1-8 minutes, preferably for 3-5 minutes, while it is freely supported on an auxiliary carrier, and then subjected to cooling to below 50 DEG  C.
Patent NL-8300065-A (NL)
Title: Poultry drawing spoon actuated to move vertically and swivel - has crop drawer movement cam-controlled via rod and normal shaft
IPC: A22C21/06
Filed: 1983-01-10
Abstract: The mechanism for drawing poultry comprises a number of radially swivelable drawing spoons each carried by a member vertically slidable (cam track) on two parallel rods to enter an opening between breastbone and tail of a fowl suspended by the legs and resting against a drum. Each spoon has a bracket with its upper end fixed to a carrier with cam follower roller to swivel it whilst its lower end carries a crop drawer which is parallel to the bracket on insertion and at right angles thereto when withdrawn. The crop drawer is swivelled by a rod actuated (e.g. via lever or accentric) by a connecting rod or a shaft at right angles to the rod.
Patent NL-8801474-A (NL)
Title: Environmental kinetic to electrical conversion using magnetic flux - energy from kinetic particles or photon field into electron current in conductor surrounding permanent magnet
IPC: H01L39/20
Filed: 1988-06-08
Abstract: The energy conversion method uses a permanent magnet (11) which is installed in the space within a sec. coil (13) which lies within and concentric with a pref. superconducting prim. winding (12). The axis of magnetisation lies in a plane parallel to the upper and lower boundary planes of the coils (12, 13), which are accommodated between thermally conductive plants (14, 16) of e.g. Cu or Al with outwardly projecting ribs (15, 17) of the same material. Alternating current through the prim. coil (12) generates an alternating magnetic field at right angles to that of the magnet (11). The resultant field traverses the sec. coil (13) and induces a useful voltage in it. Energy drawn from the sec. coil (13) is replaced by heat transfer from the surroundings through the plates (14, 16) and ribs (15, 17) on either side of the structure.
Patent NL-9000368-A (NL)
Title: High power loudspeaker with forced air cooling - has air which passes through holes in magnetic assembly to cool speech coil
IPC: H04R9/06
Filed: 1990-02-15
Abstract: The loudspeaker (1) has three main components: an outer support frame (2), magnetic assembly (3) and the cone and speech coil assembly (4,5,6). The magnetic assembly consists of a ring-shaped permanent magnet (11), soft iron back plate (10), cylindrical central pole piece (8) and a ring-shaped front pole piece (9). The cylindrical speech coil (6) is attached to the inner end of the cone (5) and passes through the gap (7) between the front pole piece (9) and the central pole piece (8). Air is forced into the hollow in the central pole piece (8) and passes through rows of radial holes (17) into the space (19) around the speech coil and out of the unit through a circular ring of holes (20) in the back plate (10). @(14pp DWg.No.1/5)@.
Patent NL-9101409-A (NL)
Title: Motor reduction gearbox with crown wheel transmission
IPC: F16H1/20
Filed: 1991-08-20
Abstract: A motor reduction gearbox comprises an output shaft 13, an input motor shaft 17, which is at right angles to the output shaft, and two or more gearwheel transmissions 14, 15, 16 which are accommodated in a gearbox and via which the output shaft is coupled to the input motor shaft. The first gearwheel transmission 14, as seen from the motor 11, is a right-angled crown wheel transmission, with a cylindrical pinion 19 attached to the motor shaft 17 and a crown wheel 18 which interacts therewith and the shaft 20 of which is at right angles to the motor shaft 17. <IMAGE>
Patent NL-9400459-A (NL)
Title: Combined cross-/transverse-current heat exchanger
Inventor: FEIKEN TAMMO
IPC: F28D9/00
Filed: 1994-03-23
Abstract: The invention relates to a cross-/transverse-current heat exchanger which comprises partition plates which are connected to one another in an airtight manner alternately at the top and bottom or the sides and are provided with passages through which there runs a tube which is attached to these partition plates = lamellae. Two gases which are at different temperatures flow past one another in cross-current and circulate around the transversely running point in which liquid at different temperatures flows. The two flue-gas flows and the liquid flow exchange thermal energy with one another.
Patent NL-9600024-A (NL)
Title: Twin-tube system
Inventor: GILS WILLEM JOHANNES NICOLAAS
IPC: F16L11/22
Filed: 1996-11-04
Abstract: The invention relates to a "TWIN-TUBE" central-heating hot-water two-pipe system, in which two plastic/al. lines 1 are encased in double blue "HDPE" 2 lines which are welded to one another by weld 5, of which one line is provided with a red marker strip 3. The length of the rolls is 2 x 50 m, mounting taking place on the floor, without connections, from central heating radiator to central-heating boiler. The right-angled bends are bent by pushing a bending spring into the TWIN-TUBE lines, these vertical bends remaining in this position in order to be connected to radiator valves etc. Clips are fitted at one-metre intervals using enlarged, single line saddle 4.
Patent PT-69759-A (PT)
Title: A method for the production of alumina
IPC: C01F/
Filed: 1979-06-12
Abstract: is made by: comminuting Al2O3-contg. raw material in a soda soln. so that the fraction above 0.08 mm. is over 12 wt.%; mixing with carbonate raw material and soda soln. to provide in the charge a mol. ratio of alkali metal oxide to Al2O3 of at least 1:1 and a mol. ratio of CaO:SiO2 of 2+-0.03:1; comminuting to a solids fraction above 0.08 mm. of 2-15 wt.%; correcting the charge; sintering at 1250-1300 deg.C; leaching in the soda-alkaline soln. to obtain an aluminate soln.; de-silicating; forming Al hydroxide by carbonation; and calcining the Al hydroxide. A limestone-nepheline charge may be obtd. in which the limestone and nepheline particles are the same size, thus enhancing sinter kiln productivity by 10-15%.
Patent PT-71440-A (PT)
IPC: C07D501/20
Filed: 1980-06-20
Abstract: Cephalosporins of the formula   <IMAGE>   wherein A is phenyl, 4-hydroxyphenyl, cyclohexyl, cyclohexene-1-yl, cyclohexa-1,4-diene-1-yl, 2-thienyl, 3-thienyl, 2-furyl, 3-furyl or 3,4-disubstituted phenyl, where the substituents, which may be identical to or different from each other, are each chlorine, hydroxyl or methoxy; Y is hydrogen or methoxy; D is hydrogen, hydroxyl, acetoxy, aminocarbonyloxy, pyridinium, aminocarbonyl-pyridinium or the group S-Het, where Het is 1-methyl-tetrazol-5-yl, tetrazol-5-yl, 3-methyl-1,2,4-thiadiazol-5-yl,1,2,4-thiadiazol-5-yl, 1,3,4-thiadiazol-5-yl, 2-methyl-1,3,4-thiadiazol-5-yl, 2-methylamino-1,3,4-thiadiazol-5-yl, 2-dimethylamino-1,3,4-thiadiazol-5-yl, 2-formylamino-1,3,4-thiadiazol-5-yl, 2-acetylamino-1,3,4-thiadiazol-5-yl, 2-methyl-1,3,4-oxadiazol-5-yl, 1,2,3-triazol-4-yl or 1,2,4-triazol-3-yl; R is hydrogen, methyl, cyclopropyl, hydroxyl, methoxy, ethoxy, mercapto, morpholino, thiomorpholino, thiomorpholino-S-oxide, thiomorpholino-S,S-dioxide, <IMAGE>  +TR  <IMAGE>  E is hydrogen or a protective group which is easily removable in vitro or in vivo; and non-toxic, pharmacologically acceptable salts thereof.
Patent PT-77764-A (PT)
Title: Treatment of containers for biological prods. - by addn. of preservative and bactericidal solns. and drying
IPC: B65B/
Filed: 1983-12-02
Abstract: Containers for transport, preservation and pre-conditioning of biological prods. for laboratory examination are pre-treated by inserting a preservative and bactericidal soln. which is then dried inside the container. Drying is pref. at 30-45 deg.C for 15-36 hrs., and the additive is converted to a stable, dry residue resistant to centrifuging.
Patent PT-84260-A (PT)
Title: Improved locking mechanism with actuator
Inventor: SEDLEY BRUCE S
IPC: E05B47/00
Filed: 1987-02-09
Abstract: A coded card key (14) is insertable through a slot (15) to bring into alignment coded magnetic areas on the card with magnetic pins (28) of the lock to unlock a core (24) relative to a locking plate (21) and enable the core (24) to be driven downwardly by the card engaging its lower flange (26) and to actuate an apparatus, typically a door-lock.   The core (24) has a cam having a first cam part (54) which is engageable by the card (14) and a second cam part (55) which abuts a limit spring (56) when the core (24) has reached the unlock position, whereby the core (24) keeps the unlock position as long as the card (14) engages the cam part (54). Withdrawal of the card (14) by the user allows return movement of core (24). The user can release the card for actuating e.g. a door-knob, instead of having to hold the card down in the lock while rotating the door-knob. <IMAGE>
Patent PT-84841-A (PT)
Inventor: WEITHMANN KLAUS ULRICH
IPC: A61K31/20
Filed: 1987-05-08
Abstract: These preparations are used for producing medicaments which are suitable for remedying prostaglandin deficiencies in humans and animals, for example curing or preventing diseases of the gastrointestinal tract.
Patent PT-89012-A (PT)
Inventor: BREUER EDGAR
IPC: B23C5/10
Filed: 1988-11-16
Abstract: The tool (1) has a conically convex end face. During the machining of a workpiece (2), the tool (1) is inclined transversely to the feed direction so that the tool (1) lies with a contact line (5) on the workpiece (2). Since the same relationships thus arise as in the rotary milling of convexely curved surfaces, superfine surfaces on the workpiece (2) are also achieved during the machining of concave surfaces of the workpiece (2). <IMAGE>