baber/WOPTO huggingface dataset:
Patent GB-1504278-A (GB)
Title: Extruders
IPC: B29C48/08
Filed: 1975-03-05
Abstract: 1504278 Extrusion-calendering apparatus FARREL BRIDGE Ltd 5 March 1975 [7 Dec 1973] 42217/77 Divided out of 1504277 Heading B5A [Also in Division G3] The description is substantially identical with that of parent Specification but the claims relate to a control member which is responsive to the volume of material in the connecting portion between the extruder and the rolls, to control the speed of the extruder screw of of the rolls, e.g. to maintain the volume of material within predetermined limits. The control member comprises the pivotal member (34), defining a wall of the channel of the connecting portion, and which is pivotable away from and towards the channel in response to variations in the volume of the material in the connecting portion.
Patent GB-1237697-A (GB)
Title: Semi-transparent plates for increased image contrast
IPC: G03B27/54
Filed: 1968-09-05
Abstract: 1,237,697. Controlling contrast. RANK XEROX Ltd. Sept.5, 1968 [Sept.7, 1967], No.42317/68. Headings G2A, G2C, G2H and G2J. The contrast of an image on an opaque imagebearing member 6 is increased by placing the member 6 in intimate contact with a semitransparent plate 4, e.g. a semi-silvered mirror, and illuminating the image through the plate, by means of a light source 2, so that a portion of the light will be reflected several times between the member 6 and the adjacent face of the plate 4 (the silvered face) before being picked up by lens system 10. Light which is reflected from the first surface of the plate 4 before reaching the image is returned to the combination 4, 6 by a mirror 8. The plate 4 may alternatively comprise a plurality of plates each of high refractive index. The apparatus may be used in, for example, electrophotographic copiers, projection printers microscopes, projectors and in examining prints.
Patent GB-1487379-A (GB)
Title: Thyristors
IPC: H01L25/18
Filed: 1974-09-30
Abstract: 1487379 Semiconductor devices GENERAL ELECTRIC CO 30 Sept 1974 [9 Oct 1973] 42448/74 Heading H1K A thyristor provided with a pilot thyristor arrangement to facilitate turn-on of the main device also has a gate turn-off facility. In the device illustrated the pilot thyristor includes a pilot cathode region 27 carrying a pilot cathode 37 shortend to the gate region 25. To obtain gate turn-off via the gate electrode 36 current is withdrawn from the vicinity of the main cathode region 26 laterally through the gate region 25 to the electrode 37 and thence through a by-pass diode 62 to the gate electrode 36. The presence of the diode 62 avoids the need for the turn-off current to be withdrawn through the relatively high resistance portion of the gate region 25 underlying the pilot cathode region 27 which, in conventional devices, prevents sufficient current to permit turn-off from being withdrawn. The diode 62 may be diffused into the body of the thyristor. Coupling of the electrodes 36 and 37 may be by a conventional electromechanical switch or by an electronic switch such as a transistor or another thyristor. Alternatively an auxiliary gate contact lead may be connected directly to pilot cathode electrode 37 to draw off the current necessary for turn-off. The device may have a simple annular or an interdigitated configuration.
Patent GB-1513621-A (GB)
Title: Self-managing variable field storage system for handling nested data structures
IPC: G06F9/45
Filed: 1976-10-13
Abstract: 1513621 Data storage BURROUGHS CORP 13 Oct 1976 [9 Feb 1976] 42469/76 Heading G4A Data is written on or read from a medium 10 via a shift register 28 and a data input/output bus 21. When data is to be inserted between two adjacent data segments on the medium 10 the second data segment is read out and temporarily stored in a shift register 29 until the additional data has been written, the second data segment then being rewritten on medium 10. Data is formed from four characters (, ), 1, 0 and each data segment may be nested to any level, a balance count register 37 counting the difference between the number of opening brackets and the number of closing brackets, and hence the level of nesting, for each data segment. Free space may be provided between data segments or at certain specified locations within data segments and is represented by 0's if unassigned or by 1's if assigned for expansion of an adjacent data segment. Data segments may be expanded or contracted by application of appropriate commands to a command register 30. When a certain field is to be read out its name vector may be supplied to a register 41 to be compared at 43 with the name vectors contained in the data segments read from medium 10, coincidence causing the appropriate field to be supplied to data bus 21. A context stack 47 holds properties which are inherited by a field from a previous field, such properties not being repeated in each field of a data segment. A local origin stack 35 retains information about the positions of recently accessed fields.
Patent GB-962307-A (GB)
Title: Improvements in or relating to crimping cellulosic yarns
IPC: D02G1/02
Filed: 1962-11-09
Abstract: Crimped yarn is produced by temporarily high-twisting e.g false-twisting, heat setting and back twisting and/or intertwisting one or more chemically modified natural cellulose textile e.g. cotton, yarn(s) or roving i.e. yarn &c. of natural cellulose which has been partially esterified and/or etherified e.g. by acetylation, cyanoethylation or benzylation, with retention of the fibre structure of the yarn, so as to increase the thermoplasticity of the yarn. Heating means for setting the yarn may comprise an electric coil which heats the air in a tube through which yarn passes, a box with heating coils through which yarns pass at different points, or a metal contact surface.  The crimp may be fully developed by immersion of skeins of yarn in hot water under tension-free conditions.
Patent GB-1319394-A (GB)
Title: Process for stabilizing acrylic polymer fibres
IPC: D01F9/22
Filed: 1971-09-13
Abstract: 1319394 Acrylonitrile polymer filaments MONSANTO CO 13 Sept 1971 [14 Sept 1970] 42499/71 Heading B5B [Also in Division C1] Heat-stabilized acrylic fibres are made by introducing the fibres into a treating bath maintained at a temperature in the range of 165‹ to 210‹ C. and containing a solution comprising an aliphatic polyol and dissolved therein a catalytic amount of either or alkali metal salt of the polyol or an alkaline-earth metal salt of the polyol, the polyol being characterized by a boiling point in excess of 165‹ C. and by solubility in water; permitting the fibres to remain in the treating bath for a period of from 1 to 15 minutes, after which the fibres are water washed; and thereafter heating the fibres under tension in an oxygen-containing atmosphere in the range of from 270‹ C. to 350‹ C. for a period of from 1 to 3 hours. Specified polyols include ethylene glycol, propylene gycol, 1À4 butanediol, diethylene glycol, glycerin and diglycerol. Suitable basic catalysts include basic alkali metal salts, alkali metal substituted polyols and tertiary amines, e.g. triethanolamine, morpholine and substituted pyridines. Sodium glyceroxide is preferred, and the catalyst is desirably present in an amount of from 0À005 to 0À15 m. e.g. of solution, treatment time in the hot solution suitably being up to 15 mins., especially 2 to 5 mins. The fibres may be heated from the polyol bath temperature to a temperature above 270‹ C. in less than 30 mins, preferably less than 15 mins, and stabilization of the fibres completed by heating in air or oxygen for 1 to 2¢ hours. Fibres so treated are characteristically dark reddish brown or black, free of all interfilamentary and surface fusion, show no flash-off in a Meker burner flame and no visible skin-core delineation in their microscopic fibre cross-section. For a method of making carbon fibres therefrom, see Division Cl.
Patent GB-877661-A (GB)
Title: Polymerization of conjugated dienes
IPC: C08F36/04
Filed: 1959-12-15
Abstract: A modification of the process of the parent Specification comprises contacting one or more conjugaged dienes, with or without one or more polymerizable hydrocarbons, at-70 DEG  to + 80 DEG C. in an inert atmosphere, and in a hydrocarbon medium, with a catalyst prepared by combining a trihydrocarbon aluminium and a titanium tetrahalide, the medium containing an amine.  A non-polymerizable ether may also be present.  Specified dienes include butadiene, isoprene, piperylene and 2-phenyl-butadiene, while lists of amines, organo-aluminium compounds, hydrocarbon diluents and ethers are given.  The catalyst may be destroyed and the product separated with an alcohol, acetone, a carboxylic acid, water, complexing agents and large amounts of amines.  The rubbery product may be vulcanized.
Patent GB-1056826-A (GB)
Title: Fan apparatus for exhausting fumes
Inventor: MORRISON JOHN MAYNARD
IPC: F04D17/16
Filed: 1963-10-29
Abstract: 1,056,826. Cooling electric motors. CENTRIFLO PTY. Ltd. Oct. 29, 1963, No. 42644/63. Heading H2A. [Also in Divisions F1 and F4] In an apparatus for exhausting fumes, e.g. gas or vapour or air charged with poisonous or irritating substances from factories, laboratories, paint spraying booths and the like, a casing 1, having an inlet 2 and an outlet 3 in axial alignment, has mounted therein a motordriven fan wheel 22 and a chamber 5 housing and shielding the motor 19 from fumes passing through the casing. Auxiliary blades 23 on the fan wheel 22 draw air through a port 15 in an inspection cover 13, over the motor 19 and through an opening 16 into the main stream. This cools the motor 19 and prevents fumes from entering the chamber 5. The outer wall 11 of the chamber 5 is removable for installation of the fan and motor. A drip deflector 8 and a water-sealed drain-off pipe 28 are provided.
Patent GB-1535531-A (GB)
Title: Pharmaceutical compositions
IPC: A61K31/57
Filed: 1976-10-15
Abstract: 1535531 Composition for asthma treatment WILLIAM R WARNER & CO Ltd 15 Oct 1976 [17 Oct 1975] 42741/75 Heading A5B A pharmaceutical composition comprises at least one micronised thymol derivative: wherein R is alkyl with up to 11 carbons or alkoxy (R'O) where R' is alkyl with up to 10 carbons, and/or a salt thereof, and optionally a micronised antiallergenic steroid (defined), together with an aerosol propellant.
Patent GB-1092549-A (GB)
Title: Method for hardening proteins or proteinaceous substances
Inventor: SELS FRANCIS JEANNE
IPC: G03C1/30
Filed: 1965-10-08
Abstract: Proteins, e.g. gelatin and proteinaceous layers are hardened by incorporating therein 4-chloro-1,3 - dioxolanone - 2 or 4,5 - dichloro - 1,3-dioxolanone-2.
Patent GB-1189520-A (GB)
Title: Gas Chromatography
IPC: B01D15/08
Filed: 1967-09-20
Abstract: 1,189,520. Gas chromatography. CORNING GLASS WORKS. 20 Sept., 1967 [26 Oct., 1966], No. 42810/67. Heading B1L. Gas chromatography columns comprise as support material particles of a glass consisting exclusively of 50-95, preferably 80-90, mole % silica and 50-5, preferably 20-10, mole % alkali metal oxide (calculated from the batch on the oxide basis). The alkali metal oxide may be lithium, sodium or potassium oxide, or mixtures thereof. Preferably the particles are substantially spherical and have a size of 20-150 mesh (U.S. Standard sieve), individual particles in any column not varying by more than 20 mesh from each other. Such support material is stated not to exhibit peak tailing, and, if leached in a 1-10% ammonium bifluoride solution for 5-15 minutes before use, to exhibit sharper peaks albeit with longer elution times.
Patent GB-1072251-A (GB)
Title: Improvements in or relating to parachutes
Inventor: DAVIES IVOR JOHN
IPC: B64D17/34
Filed: 1962-11-13
Abstract: 1,072,251. Parachutes. HAWKER SIDDELEY AVIATION Ltd. Nov. 12, 1963 [Nov. 13, 1962], No. 42925/62. Heading B7G. A parachute comprises a canopy 12 formed with radial slits to provide flaps 13 which are initially connected at the apex by a frangible tie 11. Intermediate the length of the flaps an extensible cord 16 and an inextensible cord are secured to the flaps, the length of the inextensible cord being greater than the unextended length of cord 16. Upon deployment, tie 11 breaks to provide a vent, and as the speed of descent and loading on the canopy increases, the cord 16 extends to provide a larger vent.
Patent GB-1526235-A (GB)
Title: Preparation of pyrimidines
IPC: C07D239/48
Filed: 1975-10-20
Abstract: 1526235 Pyrimidine derivatives ASTRA PHARMACEUTICALS AB 20 Oct 1975 [21 Oct 1974] 42995/75 Heading C2C Compounds of Formula I may be prepared by reacting 2,4-diamino-6- hydroxypyrimidine with 3,4,5 - trimethoxybenzaldehyde in a solvent to form an intermediate reaction product of probable formula followed by reduction of the above intermediate product. When the first reaction step is carried out in the presence of water, the intermediate is obtained in the form of a complex of formula
Patent GB-1530300-A (GB)
Title: Temperature transducer arrangement
IPC: G01K7/24
Filed: 1975-10-22
Abstract: 1530300 Temperature control N V PHILIPS GLOEILAMPENFABRIEKEN 22 Oct 1975 [25 Oct 1974] 43343/75 Heading G3R In an arrangement whereby one and the same temperature sensor 23 controls two (or more) on/ off outputs 35, 36 to operate at different temperatures, the sensor comprises one arm of a bridge 23, 24, 30, 31 connected as shown to two (or more) differential amplifiers 20, 21. The latter have a common reference input 22 but their other inputs 29 and 32, though derived from the same point on the bridge, are different. The difference may be ensured by a potential divider 33, 34 associated with one of them or Fig. 2 (not shown), by a bias potential applied to one of them. In Figs. 1 and 2, one of the outputs may operate the fan of a storage heater and the other may operate a supplementary heater. Fig. 3 (not shown), depicts an arrangement whereby a fan and a supplementary heater not only have different operating temperatures but also change these temperatures in different tariff periods (e.g. day and night).
Patent GB-1509884-A (GB)
Title: System and method of measurement of electrical insulation qualities of alternating current equipment
IPC: G01R27/18
Filed: 1976-10-20
Abstract: 1509884 Insulation monitoring of AC equipment JAMES G BIDDLE CO and NORTHEAST UTILITIES SERVICE CO 20 Oct 1976 [21 Oct 1975] 43489/76 Heading G1U The insulation of an A.C. equipment 10, Fig. 2, under test, the insulation impedances to earth being shown as RC combinations 14A, 16A; 14B; 16B; and 14C, 16C, for each of three phases, is monitored by comparing the earth current that flows with that which flows through three standard impedances Cl, C2, C3 selected to match the insulation impedances of the equipment under test when the equipment was known to be in good order. In practice, an impedance ZR associated with the standard impedances is adjusted, when the equipment is known to be good, to achieve balance, and when the equipment is subsequently tested the change required in ZR to achieve balance again is noted. By recording such changes in a regular manner, e.g. on a graph, the steady deterioration of the insulation can be followed and appropriate action taken before a fault occurs.
Patent GB-1178248-A (GB)
Title: An Improved Pipe Coupling.
Inventor: LINDSAY ROBERT ARCHIBALD GORDO
IPC: F16L17/04
Filed: 1966-09-29
Abstract: 1,178,248. Pipe couplings. R. A. G. LINDSAY. 4 Sept., 1967 [29 Sept., 1966], No. 43587/66. Heading F2G. A pipe coupling comprises a rubber or synthetic resin sleeve sealing ring 12, Fig. 6, chamfered at its ends and having inwardly turned internal flanges to receive the pipe ends which together with the sleeve form an annular chamber and a pair of opposed collars 14, 15 which have means by which they can be coupled together and can be fitted on each pipe end to house the two ends of thesleeve. The arcuate tongue 19 of collar 14 engages in bayonet fashion within a slot formed in a lug 17 extending from collar 15, the cooperating faces being inclined relative to a plane normal to the pipe axis. The tongue extremities (19a), Fig. 4 (not shown), are outwardly inclined to lock the collars against unintentional rotary movement. In another embodiment each coupling has a lug with a slot and a tongue, the tongue of each collar mating with the slot of the other. Each collar may have a plurality of lugs and tongues.
Patent GB-1048308-A (GB)
Title: Improved support stand
IPC: A47G23/02
Filed: 1964-10-28
Abstract: 1,048,308. Stands. S. R. WEISBERG. Oct. 28, 1964, No. 43941/64. Heading A4H. [Also in Division B8] A support stand for flexible bags may be folded from a flat position (Fig. 6, not shown) to the form shown in Fig. 1 when the bases of the legs 26, 26<SP>1</SP> engage apertures in cross members 2b, 2b<SP>1</SP>. In the form shown extensions 21 on one wall of the upper stand portion 20 are passed through slits in the bag to engage apertures in the other wall 20 b and so support the bag. In one embodiment (Fig. 8, not shown) the cross members 2b<SP>1</SP> are integral with two of the legs 24' and have sockets in their free ends 42 to receive the other pair of legs. Alternatively the cross members 2b may be separate (see Fig. 1) with apertures at each of their ends to engage the leg members. To dispense the contents of the bag portion 4a (Fig. 1) may be cut away and the bag tilted in a vertical plane.
Patent GB-1132879-A (GB)
Title: Improvements in or relating to electric pressure-sensitive switches
IPC: H01H35/34
Filed: 1966-10-03
Abstract: 1,132,879. Fluid actuation of switches. CONTROLS CO. OF AMERICA. 3 Oct., 1966 [22 Oct., 1965], No. 44019/66. Heading H1N. In a switch similar to that of Specification 884,686, the diaphragm 14 is formed with hollow lugs 54 which in the " reset " position, abut the casing to limit relaxation of a spring 26. Reference has been directed by the Comptroller to Specification 884,686.
Patent GB-1031582-A (GB)
Title: Machine tool spindle mechanism
IPC: B23B31/26
Filed: 1964-10-29
Abstract: 1,031,582. Machine tool details. CINCINNATI MILLING MACHINE CO. Oct. 29, 1964 [April 2, 1964], No. 44252/64. Heading B3B. [Also in Divisions F2 and H2] A power drawbolt 12 of a milling or boring machine tool spindle 10, driven through gears 21, 22 for high or low speeds, is rotated relatively to the spindle to load or unload a tool holder 11 through a screwed connection 13, such rotation being effected by a reversible electric motor 33, 34, driving through a sun-wheel 41, fast on the motor shaft 35, of an epicyclic reduction gear having an outer ring gear 58 fixed to the electric motor housing 32, the planet gear carrier 57 being part of an axially movable clutch member 53 formed with facial teeth 60 which during disengagement are spring-biased at 49 out of positive mesh with teeth 31 of a bushing 24 in which the drawbolt 12 is axially movably splined, the arrangement being such that centrifugally operated balls 62, spaced in a freely mounted cage 63 between a flywheel 40, fast on the shaft 35, and a frusto-conical cam face 61 of the clutch member 53, roll outward and axially thrust the clutch member into driving engagement with the bushing 24 of the power drawbolt 12. A shoulder 15 on the axially movable drawbolt 12 is normally spring-biased at 25 outwards against a thrust bearing 14 in the tool spindle 10, the drawbolt moving backward against the spring bias in the event of jamming of the tool holder 11 in the spindle 10 during removal thereof, or, if on assembly, the tool holder 11 is thrust fully home before the threaded connection 13 is engaged prior to energization of the motor 33, a limit switch 69 (not described) being operated by an actuator 66 engaging the rear end of the drawbolt and a switch lever 68 to provide signals at desired times in the cycle of drawbolt operation.
Patent GB-1486839-A (GB)
Title: Apparatus for manufacturing plastics blanks
IPC: B29C49/06
Filed: 1974-10-11
Abstract: 1486839 Injection moulding preforms HEIDENREICH & HARBECK ZWEIGNIEDERLASSUNG DER GILDEMEISTER AG 11 Oct 1974 [21 Dec 1973] 44259/74 Heading B5A Apparatus for injection moulding preforms 25 comprises a mandrel 11, an outer mould 10 and a retractable sleeve 14 which is displaceable within the mould cavity at a rate dependent on the rate of injection into the cavity. The mandrel 11 and sleeve 14 extend through a bore in a mould part 15 which is retractable longitudinally independently of the outer mould 11. Two split ring mould parts 17, 18 for forming the neck of a blow-moulding preform are housed in a recess 16 in the mould part 15. The mould parts 17, 18 are mounted on pivoted arms (28, 29) Fig. 3 (not shown) and can be moved apart by means of a parallelogram linkage (31) and hydraulic mechanism (35). In operation, a chamber 20 in a cylinder 19 is filled with plastics material by means of an injection nozzle 22. During this filling the chamber 20 is closed by a longitudinally displaceable shaft 23. The shaft 23 is then pulled back to engage a stop 24 and the mould part 15 is simultaneously pushed forwards together with the outer mould 10 by hydraulic means (not shown). This causes plastics material to enter the mould cavity by overcoming a biasing force acting on the sleeve 14. The sleeve 14 is used to remove the moulded preform from the mandrel 11.
Patent GB-1221182-A (GB)
Title: Azo colouring matter containing imide groups
Inventor: BERRIE ALISTAIR HOWARD
IPC: C09B43/15
Filed: 1967-09-29
Abstract: 1,221,182. Dyes containing cyclic imide groups. IMPERIAL CHEMICAL INDUSTRIES Ltd. 11 Sept., 1968 [29 Sept., 1967], No. 44470/67. Heading C4P. The invention comprises dyes free from sulphonic and carboxylic acid groups and having the general formula wherein X is a direct link or a divalent radical, A is an optionally substituted trivalent aryl radical, the carbonyl groups being in ortho or peri positions, B is a coupling component radical and D is an optionally substituted divalent aryl radical. Preferably A is an optionally substituted benzene or naphthalene ring, B is a coupling component of the acetoacetarylamide, 2 - hydroxy - 3 - naphthoic acid arylamide or 5-pyrazolone series and D is an optionally substituted phenylene radical. They are prepared by (a) reacting one mole of an acid X-[-A-(COOH) 2 ] 2  or the anhydride or cyclic imide thereof with two moles of an aminoazo compound H 2 N-D-N=N-B preferably in an inert solvent, or (b) coupling two moles of a coupling component H-B with a tetrazotized diamine of the formula Intermediate dyes are prepared. The dyes give yellow, red and orange shade paints and synthetic polymers, e.g. P.V.C. polyethylene, polystyrene and cellulose acetate.
Patent GB-1329065-A (GB)
Title: Colour-developer compositions
IPC: C09D11/00
Filed: 1971-09-23
Abstract: 1329065 Pressure-sensitive recording sheets FUJI PHOTO FILM CO Ltd 23 Sept 1971 [24 Sept 1970 23 Oot 1970 15 Dec 1970 26 Dec 1970] 44518/71 Heading D2B [Also in Divisions C4 and G2] Pressure- or heat-sensitive recording sheets are coated with a colour-developer composition comprising (i) an aromatic carboxylic acid or anhydride and (ii) a metal compound selected from Gp II, III or IV metal oxides, hydroxides or carbonates, or basic lead or aluminium acetate. The composition is colourless but develops colour in contact with a conventional colour-former. The developer is dissolved or dispersed in water and/or an organic solvent; further ingredients may be (iii) an inorganic pigment (iv) a binder (v) a plasticiser and (vi) a stabilising alkali. The developer is coated by conventional means on to the surface of a support sheet, and is used in conjunction with conventional colour-formers coated on the same or opposite surface of the same support or on a different support. For heat-sensitive recording sheets a thermofusible material such as acetonanilide may be applied with the colour former and subsequently melted.