baber/WOPTO huggingface dataset:
Patent GB-1301168-A (GB)
Title: Digital/analog multiplier
Inventor: LEIGHTON HOWARD NOYES
IPC: H03K7/02
Filed: 1970-11-09
Abstract: 1301168 Multipliers INTERNATIONAL BUSINESS MACHINES CORP 9 Nov 1970 [26 Feb 1970] 53155/70 Headings G4G and G4H [Also in Division H3] In a digital/analogue multiplier in which the analogue input (e i , Fig. 1, not shown) is passed via resistances R B , R A  to first and second input terminals of an operational amplifier having a feedback path connected to the second input terminal, a variable impedance (R V ) controlled by digital signals is connected between the second input terminal and a reference source so that the output (e 0 ) is the product of the input signal (e i ) and the digital signals. In the balanced modulator of Fig. 2 in which R A  = R V  = R F/2 , binary signals of 0 and 1 at input 20 applied to transistor 26 result in a respective voltage gain of + 0.5 and - 0.5. Circuit 30 may be included to compensate for the offset voltages of transistor 26 and operational amplifier 22 by introducing an offset current at a point 38.  In the embodiment of Fig. 3 a nine-bit parallel coded signal is applied to switching transistors Q1-Q9 to connect selected binary weighted resistances R 1 -R 9  between the second input terminal of the operational amplifier and the reference potential.
Patent GB-1483540-A (GB)
Title: Process for the production of moulded polyamide products
IPC: C08G69/00
Filed: 1974-12-10
Abstract: At least one lactam having at least 6 ring members is subjected to an activated anionic polymerisation in the presence of a combination of a strongly alkaline catalyst and a weakly alkaline catalyst. The molar ratio of the catalysts is between 2:1 and 20:1, the concentration of the weakly alkaline catalyst, based on the lactam, is between 0.01 and 0.5 mol %, and the molar ratio of strongly alkaline catalyst to activator is between 1:3 and 3:1. One part of the lactam, mixed with the activator, is melted in a reservoir vessel while the remainder, mixed with the catalyst combination, is melted in a separate reservoir vessel. The melts are metered by means of metering pumps and two injection nozzles into the moulding tool where they are mixed countercurrently and polymerised. This produces unshrunk polyamide mouldings having an excellent integral foam structure.
Patent GB-1137726-A (GB)
Title: Non-discoloring composite polyurethane foam and skin-forming material
IPC: C08J9/34
Filed: 1966-11-29
Abstract: 1,137,726. Polyurethane foam containing laminates; moulding foamed articles. GOODYEAR TIRE & RUBBER CO. 29 Nov., 1966 [3 Jan., 1966], No. 53392/66. Headings B5A and B5N. [Also in Division C3] A composite material comprises polyurethane foam having bonded thereto a skin or covering of plasticized polyvinyl chloride or a terpolymer of acrylonitrile, styrene and a C 4-8  diene, said polyurethane foam being the reaction product of material of at least 600 M.Wt., containing a plurality of reactive hydrogen atoms capable of reacting with isocyanate groups to form urethane groups, an organic polyisocyanate, a foaming agent and a catalyst of the formula R 1 NHRORNHR 2 , wherein R is C 2-10  alkylene and R 1 and R 2 are C 1-10  alkyl. The polyurethane foam may be formed from a polyester polyol, a polyether polyol, a polyesteramide or a hydroxyl-torminated hydrocarbon or polycarbonate, and a tin-containing catalyst may be used. The product may be moulded to form seat cushions or arm rests, e.g. by vacuum forming, rotary casting or flush moulding. In the examples, the outer layer is moulded, e.g. by vacuum forming, and a foamable polyurethane mix is poured into it and allowed to form in situ in a mould having a flat floating lid.
Patent GB-1444360-A (GB)
Title: Vinyl chloride polymerisation process
IPC: C08F2/00
Filed: 1972-11-20
Abstract: 1444360 Polymerizing vinyl chloride IMPERIAL CHEMICAL INDUSTRIES Ltd 25 Oct 1973 [20 Nov 1972] 53489/72 Heading C3P Vinyl chloride is polymerized in aqueous dispersion in the presence of a polymeric imine derived from an aziridine while maintaining the pH at at least 4. The polyimine prevents polymer build up on the walls and may be present as a coating on the walls or present in the aqueous medium; it is preferably a polyethylene imine formed by polymerizing ethylene imine in the presence of an acid. When added to the aqueous charge, amounts of 10-200 p.p.m., based on monomer, are used. An alkaline buffer is added to control the pH. Examples relate to suspension polymerization processes.
Patent GB-1139969-A (GB)
Title: Fuel assemblies for nuclear reactors
Inventor: GUMUCHIAN ANDRE
IPC: G21C3/326
Filed: 1967-11-27
Abstract: 1,139,969. Fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. 27 Nov., 1967 [5 Dec., 1966], No. 53773/67. Heading G6C. A nuclear fuel assembly comprises at least one bundle of fuel pins provided with expansion chambers and disposed in a coolant circulation duct, a tubular support located along the axis of the duct, and top and bottom end fittings respectively connecting the upper and lower ends of the duct and support, the latter supporting the fuel pins and defining an axial passageway which by-passes the space between the expansion chambers. The assembly for use in a fast reactor, shown in Figs. 1 and 2, comprises a central bundle 10 of pins loaded with fissile material disposed between a top bundle 12 and a bottom bundle 14 of pins loaded either with fertile material or with neutron-absorbing material. A tube 16 is secured at its lower end to a bottom end fitting 18 provided with coolant inlets 20 and an annular plate 22 is secured around the top of the tube 16. The pins of the central bundle 10 are of smaller diameter than those of the top and bottom bundles 12, 14 and are supported on rails secured to a grid 35. In order to permit of their free expansion, the upper ends of these pins are simply guided by another set of rails secured to a grid 34. The grids 34, 35 are provided with openings for the flow of coolant and are secured to the tube 16. The lower half of each fuel pin constitutes an expansion chamber and is separated from the upper fuel-containing half by a neck 36. A thin-walled sleeve 38 which may be formed from a spirally - wound strip surrounds the three bundles 10, 12, 14 and is attached to the bottom end fitting 18 and to the annular plate 22. At the level of the necks 36, the tube 16 contains a series of coolant outlets 44, and immediately above this level it is sealed off by a plug 42. Coolant is admitted through the inlets 20 and the greater part of the flow passes upwardly through the tube 16 and is discharged through the outlets 44, thus by-passing the bottom bundle 14 and that portion of the central bundle 10 comprising the expansion chambers. A fraction of the flow passes out of the duct 16 through ports 46 and enters the bottom bundle 14, cooling the pins of this bundle and the expansion chambers of the pins of the central bundle 10. A collector space 37 formed by the necks 36 permits uniform cooling of the fuelcontaining portion of the bundle 10. The total flow cools this portion and the top bundle 12 before passing out through openings 48 in the annular plate 22.
Patent GB-1108178-A (GB)
Title: Process for the separation of hydrocarbon compounds
IPC: C07C7/148
Filed: 1965-03-25
Abstract: p-Xylene is separated from admixture with o- and/or p-xylene by selectively transalkylating the mixture by means of an alkyl aromatic compound having a C3 or higher alkyl group in the presence of an alkylation catalyst, the p-xylene which is unchanged then being separated by distillation, and the residue subjected to further transalkylation with excess benzene in the presence of an alkylation catalyst to regenerate o- and/or m-xylene, which may be separated by a simple distillation. Suitable alkyl aromatic compounds are propyl benzene, mono- and di-tertbutyl benzenes, and tertbutyl naphthalene. Suitable alkylation catalysts are AlCl3, AlCl3/HCl and H3PO4
Patent GB-1332316-A (GB)
Title: Continuous particle-size analyzer and method
IPC: G06M11/02
Filed: 1970-11-13
Abstract: 1332316 Photo-electric particle size determination PROCEDYNE CORP 13 Nov 1970 [4 Dec 1969] 54070/70 Heading G1A [Also in Division G4] In a device for determining the particle size distribution in a liquid, the liquid flows through a test cell with transparent walls, which is optically scanned. The light source may be a helium neon laser 10 whose output is scanned backwards and forwards across the sample chamber 21. The light beam is focussed to a diffraction limited spot. The presence or absence of the particles is indicated by the interruption of the light beam. The light is detected by a photo-cell 23, whose output is a series of pulses of varying duration. This output passes first to a discriminator circuit which rejects unwanted pulses and then to a logic memory unit. In this unit the pulses are sorted into classes according to duration, (particle size), and the total number and the number in each class are counted.
Patent GB-542615-A (GB)
Abstract: 542,615. Emulsifying agents. SOC. OF CHEMICAL INDUSTRY IN BASLE. May 20, 1940, Nos. 8935 and 8936. Convention dates, May 24, 1939 and April 30, 1940. [Class 1 (i)] [Also in Group IV] Imidazoles having the formula in which A is an aromatic nucleus containing at least one sulphonic acid group and R, and R 2  are hydrogen or substituents, are treated with an alkylating agent containing less than seven carbon atoms or an aralkylating agent in the absence of water. When the product still contains a group capable of alkylation or acylation, it may be treated with other alkylating agents containing less than seven carbon atoms or aralkylating agents or with an acylating agent. In examples (1) the sodium salt of the sulphonated benzimidazol derived from_ o-phenylenediamine and coconut - fatty acids is alkylated with chloracetamide, chloracetic ethyl ester, formaldehyde-γ-chlorpropylene acetal and a-chlorbutyric ethyl ester in the presence of alcohol, xylene or toluene: (2) the sodium salt of the sulphonated benzimidazol derived from o-phenylenediamine and coconut-fatty acids is alkylated (a) with chloracetic ethyl ester and the product hydrolyzed, and treated with ethylene oxide, (b) with glycerol-α-chlorhydrin and then with ethylene oxide or diethyl or dimethyl sulphate, (c) with glycide and then with ethylene oxide: (3) sodium-Á-heptadecylbenzimidazol sulphonate is alkylated with ethylene oxide, at first with epichlorhydrin and then with ethylene oxide; (4) the sodium salt of the sulphonated benzimidazol derived from o-phenylenediamine and hardened blubber acids is alkylated with ethylenechlorhydrin, chloracetamide or formaldehyde-chlorpropylene acetal and then with ethylene oxide. The products, which may be used together with sodium acetate or other salt, solvents, soaps, protective colloids, finishes, weighting and matting agents are useful as emulsifying agents. The imidazol sulphonic acids may be derived from o-toluylenediamine, and ortho or 1:8-naphthylenediamines. The substituent at the nitrogen or Á-carbon may be any hydrocarbon or a hydrocarbon whose chain is interrupted by oxygen, sulphur, nitrogen or a carboxy or carboxy amide residue; Á-amino and Á-mercapto benzimidazol and reaction products of imidazoles having a Á-substituent containing an α-methylene group with aldehydes also mentioned. Butylenechlorhydrin, α-brombutyric acid and halogenalkylsulphonic acids are specified alkylating agents, and acetic anhydride and stearic acid chloride may be used for acylation of the products. The Specification as open to inspection under Sect..91 comprises also the treatment of the imidazolsulphonic acids with any alkylating agents. The use of bromlauric acid and diethanolamine is mentioned. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1539474-A (GB)
Title: Curable coating compositions
IPC: C09D11/10
Filed: 1976-12-30
Abstract: Curable coating compositions particularly suitable as a vehicle for printing inks, comprising a resin obtained by esterifying with acrylic or methacrylic acid a hydroxyl group-containing resin prepared either by reacting ingredients (A) and (B) to form a reaction mixture which is then reacted with ingredient (C) or by reacting the ingredients (A), (B) and (C). The ingredient (A) is a five-membered cyclic compound having conjugated double bonds or a Diels-Alder's reaction product thereof, the ingredient (B) a compound having both a polymerizable double bond and a hydroxyl group in the molecule and (C) a resol type phenolic resin.
Patent GB-1281936-A (GB)
Title: A winnowing blower
Inventor: MEIER HUBERT
IPC: A01F12/44
Filed: 1969-11-06
Abstract: 1281936 Winnowing blowers MASCHINENFABRIK FAHR AG 6 Nov 1969 [8 Nov 1968] 54462/69 Heading A1F [Also in Division F1] A winnowing blower for a combine harvester comprises a housing containing two axialflow impellers 5 each associated with a respective inlet and each discharging through a common lateral outlet 11. The outlet duct has converging top and bottom walls, but the side walls 10 diverge to provide a wide discharge flow. The location of the impellers at the ends of the housing reduces the possibility of damage when a machine fitted with the blower travels oven uneven ground.
Patent GB-1392611-A (GB)
Title: Synthetic plastic tapes
IPC: D01D5/42
Filed: 1971-11-25
Abstract: 1392611 Forming packages of thermoplastic tape JAMES MACKIE & SONS Ltd 2 Nov 1972 [25 Nov 1971] 54845/71 Heading B5B Packages of thermoplastic tapes are made by impressing at least 300 indentations per sq. inch in a film of a thermoplastic in an unstretched, partly stretched or split into individual tapes state, stretching or completing the stretching of the film, and in the case of the film splitting it into tapes, then winding the tapes into packages, preferably in accordance with the method of Specification 1,202,205. The indentation is preferably carried out when the film is in a molten or plastic state, e.g. soon after the film leaves the extruder. The indentations may be effected by a roller the surface of which is patterned with projections, e.g. diamond.
Patent GB-1135759-A (GB)
Title: Improvements in fastenings for doors and the like
IPC: E05B65/08
Filed: 1965-12-28
Abstract: 1,135,759. Fastenings. Y. NAKANISHI. 28 Dec., 1965 [27 Dec., 1964], No. 54946/65. Heading E2A. A fastening for doors and the like comprises a cylinder 6 in which moves a rod 17 which is projected against the action of a pretwisted spring 19 by pressing a knob 18 on one end of the rod to engage an opening 13 in a housing 9 the opening having slots for pins 27 on the rod to pass through the rod being rotated by the spring and the rotation being limited by a boss 25 on the rod engaged in a slot in the cylinder. The boss 25 moves in slot 22 in the cylinder 6, the end of the slot being enlarged to allow the rod to rotate a limited extent to retain the rod in engagement with the housing. The rod is withdrawn by the spring when the knob is turned. The rod may be secured in two steps by having the slot in the cylinder of zig-zag form and the housing with two spaced aligned openings each of which is engaged in turn by the pins in the end of the rod. In another embodiment the rod is projected by the spring, a sleeve 14 of a cover plate having an end stop which abuts the end of the knob when the rod is withdrawn and which engages in a slot in the knob when the knob is rotated to free the rod for projection. The end of the rod may support a tongue which when the knob is pushed rotates to latching position.
Patent GB-1279804-A (GB)
Title: Tachometer
Inventor: HARE MICHAEL JOHN
IPC: G01P3/486
Filed: 1968-11-20
Abstract: 1279804 Selective signalling COURTAULDS Ltd 19 Nov 1969 [20 Nov 1968] Heading G4H A rotating member (not shown) having an optical discontinuity is sensed by a probe 2 consisting of the ends of a bundle 1 of light fibres, which are bifurcated at their other ends 4, 5 so as to carry light from a source 6 to the member, and light reflected by the member to a photo-electric cell 7, output pulses from the cell passing to a counter 9 and being used to control the intensity of the light 6.
Patent GB-1363630-A (GB)
Title: Fabrication of permeable sintered artefacts
IPC: C04B35/634
Filed: 1971-11-19
Abstract: 1363630 Permeable refractory article UNITED KINGDOM ATOMIC ENERGY AUTHORITY 19 Nov 1971 [19 Nov 1970] 55143/70 Headings C1A and C1J [Also in Division B5] Permeable sintered articles which are electrically conductive are formed by granulating a first refractory material which is electrically insulating and which has previously been densified by firing, coating the granules with a slurry comprising a powdered second refractory, a third material, a resin binder and solvent therefor, removing the solvent, shaping the coated granules into a green artefact and firing, the second and third materials being reactive with each other to produce in situ an electrically conductive phase. The resin binder may be thermoplastic or thermosetting or may provide both thermoplastic and thermosetting properties, e.g. polyvinyl butyral. The refractory may be a ceramic, cermet, metal or a mixture thereof. The first refractory may be silicon nitride, the second silicon and the third material may be graphite. Firing may be carried out in two stages, the first stage converting silicon and graphite into silicon carbide and the second at a higher temperature to produce silicon nitride.
Patent GB-1476699-A (GB)
Title: Power supply system
IPC: G05F1/563
Filed: 1974-12-24
Abstract: 1476699 Electricity supply systems MAT. SUSHITA ELECTRIC INDUSTRIAL CO Ltd 24 Dec 1974 55714/74 Heading H2H [Also in Division G3] In a power supply system for operation on at least two different supply voltages, the number of secondary windings in circuit of a power transformer are automatically selected in response to the supply voltage so as to provide a substantially constant voltage for different predetermined values of applied voltage which substantially constant voltage is then rectified at 9 ... 12 and voltage stabilized at 14 ... 16. As described, when the supply voltage to primary 1 is changed from 100-200 V, relay 8 is energized so as to select tapping 2b on the secondary 2 and thus feed the same voltage to the bridge rectifier 9 ... 12. In Fig. 3A, relay 8 is energized from the secondary winding 2, tappings of which cater for supply voltages of 100, 120, 220 and 240. Figs. 2A, 2B and 3B-4B (not shown) relate to systems in which the number of secondary windings is selected, in some cases in response to the voltage at a tapping on the primary.
Patent GB-1275499-A (GB)
Title: Internal combustion engines having renewable valve seat members
IPC: F01L3/22
Filed: 1970-11-25
Abstract: 1275499 I C engine poppet valve seats SULZER BROS Ltd 25 Nov 1970 [2 Dec 1969] 56077/70 Heading F1B A renewable valve seat member 2 in a bore 3 in a cylinder head 1 is prevented from moving away from the cylinder by a shoulder 4 in the bore and towards the cylinder by at least one metal strip 7 supported between a shoulder 6' in the bore and a shoulder 8 on the outer surface of the seat member. The strip 7 has an end 7' accessible through an opening 16 in the seat member 2. Three strips 7 may be provided. A cooling water chamber around the seat member 2, communicating with the cylinder head cooling chamber through bores (13, 14), Fig. 2 (not shown), is bounded by resilient annular parts 10 and 11 containing soft seals 12, e.g. O-rings. The portion 3' of the bore 3 has a force fit with the seat member 2 and a clearance fit is provided for the remainder of the seat member.
Patent GB-1374975-A (GB)
Title: Preparation of trimanganese tetroxide
IPC: C01G45/02
Filed: 1970-11-30
Abstract: 1374975 Trimanganese tetroxide preparation KODAK Ltd 28 Feb 1972 [30 Nov 1970] 56793/70 Heading C1A Mn3O4 is prepared by oxidizing an aq. suspension of Mn(OH)2 with air, O2 or O2-enriched air at elevated temp. and pressure, preferably 90- 105‹ C. and 20-70 p.s.i.g. The Mn(OH)2 may be suspended in de-ionized water, or an aq. soln. of NH3, CH3COOH or CH3COONH4. The Mn(OH)2 may have been pptd. from (a) MnSO4/ (NH4)2SO4 liquor obtained in the oxidation of aniline into p-benzoquinone or (b) from MnCl2 soln., by treating the liquor or soln. with an alkaline reagent to a pH of 8À7-9À8. The product of the oxidation may be retreated as above, washed, filtered and dried.
Patent GB-1210687-A (GB)
Title: Nuclear reactor power system
Inventor: BOARDMAN CHARLES EDWARD
IPC: G21D5/06
Filed: 1967-12-19
Abstract: 1,210,687. Nuclear power plant. GENERAL ELECTRIC CO. 19 Dec., 1967 [11 Jan., 1967], No. 57645/67. Heading G6C. A steam cooled, fast reactor supplies superheated steam to a turbine after the removal of radio-active contamination. Saturated steam is introduced into the core 36 from the line 38 and is discharged, superheated, through line 40 to the heat excharger 12 and desuperheater 14. In 14, the superheated steam is brought into contact with turbine condensate and recirculated purified water is introduced by lines 46, 48 to produce wet saturated steam containing entrained water. The steam is dried in 16 and returned by the circulator 18 to the reactor. Contaminants are removed from the water in purifier 20, by filtration and ion excharge, and the purified water returned to 14 through line 54. A portion of the saturated steam from 16 is passed through line 82, to excharger 12, superheated, and supplied to turbine 28. In a modification, a number of desuperheaters and driers are connected in series.
Patent GB-1180779-A (GB)
Title: Yarn rupture detector.
IPC: B65H63/028
Filed: 1967-12-20
Abstract: 1,180,779. Yarn breakage detector. SOC. RHODIACETA. 20 Dec., 1967 [21 Dec., 1966], No. 57835/67. Heading D1F. A yarn rupture detector comprises a lever 1 rockable about a pivot 3 between a yarn detecting position (as shown) and an alarm position. The lever carries a yarn contact member e.g. a pin 5 and has means such as a weight 7 to apply a first force which urges the lever from the detecting position towards the alarm position, said force decreasing as the lever moves towards the alarm position. Magnetic means such as magnet 9, 10 on the lever and frame 4 respectively urge the lever towards the alarm position but are such that the magnetic force is negligible in the detecting position. The first force applied by weight 7 is such that the torque it applies on lever 1 is reversed when the lever moves more than a certain distance from the yarn and the magnitudes of the first force and the magnetic forces are such that there is a position of equilibrium between the detecting and alarm positions and the magnetic force is greatest when the lever is between the equilibrium position and the alarm position. The arrangement is such that the force of pin 5 on yarn 6 is very small and yet a very positive movement to the alarm position takes place on yarn breakage. The alarm e.g. an alarm bell or signal disc is operated by an abutment 12 on lever 1 closing contacts 11 on the frame 4. The weight 7 is eccentrically mounted and may be set in different positions to provide the required couple on the lever.
Patent GB-1110170-A (GB)
Title: Process for the isomerization of a hydrocarbon fraction
Inventor: BITTNER CLARENCE WALTER
IPC: C07C5/27
Filed: 1966-12-28
Abstract: C5- 7 hydrocarbon fractions containing n-paraffins and naphthenes are isomerized by contact at elevated temperature and pressure, and in the presence of hydrogen and 100-5000 p.p.m. by weight sulphur, with a catalyst comprising a Group VIII noble metal composited with a halogenated siliceous cracking component. Suitable catalysts comprise platinum or palladium composited with a fluorided siliceous material, comprising 50-95% silica in combination with alumina, zirconia or titania. The sulphur may be provided in the feed, as H2S in recycle hydrogen, or by separate addition, e.g. of tertiary butyl mercaptan. The catalyst may be pretreated with an M2/M2S stream prior to use. In an example, a straight-run C5- 6 feed comprising, inter alia, 22.3% n-pentane, 21.1% isohexane, 12.6% n-hexane and 20.7% methylcyclopentane, is isomerized, the main conversion being of n-paraffins to iso-paraffins.