baber/WOPTO huggingface dataset:
Patent GB-1332511-A (GB)
Title: Polyimides
IPC: C08G73/10
Filed: 1970-07-31
Abstract: 1332511 Laminates CIBA-GEIGY AG 31 July 1970 [1 Aug 1969 31 Oct 1969] 37201/70 Heading B5N [Also in Divisions B2 C3 and D1] Laminates or composites may be formed using impregnated fibres or fabrics impregnated  with a composition (C) comprising polyamic acid (P) having recurring unit  (P) can be converted, by heating or dehydrating, into polyimide (Q) having recurring units  R contains at least one carbocyclic or heterocyclic aromatic ring of 5 or 6 members, the 4 carbonyl groups being attached directly to different C atoms in the rings, the groups being in pairs, the two groups in each pair being attached to adjacent C atoms. R<SP>1</SP> is phenylene, biphenylene, naphthylene, anthracylene, C 2-8  alkylene, C 5-12  cyoloalkylene, or where X is S, O, sulphone, CH 2 , CO or C 1-8  alkylene, C 5-12  cycloalkylene or phenyl-substituted methylene group. R<SP>2</SP> is H, NH 2 , dialkyl amino, pyrrolidino, piperidino, anilino, N-alkylanilino, diphenylamino, phthalamino, C 1-10  alkyl, N-naphthylanilino, Cl, COOH, OH, phenyl, or phenyl substituted by NO 2 , halogen, COOH, CN, C 1-10  alkyl, or phenyl. n#3. m is 0 or 1. R may be where R<SP>3</SP> is -O-, -S-, -SO 2 -, -CONR 4 - -CO-, -NR 4 -, -SiR 4 R 5 -, or Composition (C) may be used to impregnate fabrics of glass, boron, metal oxide whiskers, and graphite, forming prepregs which may be cured to form rigid laminates or composites, forming bonds between Al, Ti, or stainless steel, In Example 14, 181E glass fabric (A1100 amino silane finish) is impregnated with (C) and heated at 150C to reduce solvent content to 12%. An 18-ply laminate containing 5 impregnated plies per dry ply is made by heating at 750 psi and 500C and then at 600C.
Patent GB-1491272-A (GB)
Title: Polymer adhesive compositions containing gelling agents
IPC: C08K5/20
Filed: 1975-09-10
Abstract: 1491272 Adhesive compositions containing gelling agent LINGNER & FISCHER GmbH 10 May 1976 [10 Sept 1975] 37212/75 Headings C3P C3U and C3R An adhesive composition of the stick or crayon type comprises at least one adhesive polymer, at least one non-toxic volatile solvent or liquid dispersant for the adhesive polymer, e.g. water glycerine, methanol, ethanol, isopropanol, and a gelling agent in an amount sufficient to reduce the tendency of the solution or dispersion to flow under the influence of gravity and having the formula where R is hydrogen or a C 1-18  alkyl group and R 1  is a C 1-18  hydrocarbon group. The salt preferably contains alkali metal, alkaline earth metal, ammonium or substituted ammonium and the adhesive polymer may be polyvinyl acetate, polyvinylalcohol, polyvinylchloride, polyvinylpyrrolidone, polyurethane, polyacrylic acid, polymethacrylic acid or esters thereof, polyacrylamides, methyl cellulose or ethoxylated starch derivatives. An ionic salt, e.g. NaCl, KCl, NH 4 Cl or Na 2 SO 4  may be added to increase the gel temperature. The gelatinization agents exemplified are sodium-N-hexylterephthalic acid amide, sodium-N-(n-octyl)- terephthalamide, and n-octyl-terephthalic acid amide, n-hexyl-terephthalic acid amide, and n-decyl-terephthalic acid amide in the presence of sodium hydroxide.
Patent GB-1417440-A (GB)
Title: Purification of selenium and selenium alloys by precipitation from a melt
IPC: C01B19/02
Filed: 1973-08-06
Abstract: 1417440 Zone freezing BOLIDEN AB 6 Aug 1973 [4 Aug 1972] 37269/73 Heading B1S [Also in Division Cl] Selenium is purified by removal of small amounts of foreign elements by keeping a small portion of the selenium at the transition temperature between the solid and liquid phases and maintaining the remainder at a higher temperature for a sufficiently long time to allow concentration of the foreign elements in the smaller portion at the transition temperature. The process is applicable to the purification of selenium alloys particularly arsenic selenide. The treatment may take place under partial vacuum whereby volatile matter can evaporate in a gas phase. After treatment the melt is quickly cooled to a temperature below the melting point and that portion which has been kept at the transition temperature is removed after cooling. The process may be carried out in apparatus such as that shown in Fig. 1. A gas tight cylindrical vessel 1 is filled with liquid selenium (or arsenic selenide) 2. The gas tight sealing hood 3 is connected to a vacuum source. The temperature of the selenium in the marked off area 5 is between 206C- 210C (i.e. round about the transition temperature. The temperature in area 5 is controlled by a temperature sensitive device 6 which is connected via a controlling device 7 to the heater 8. The vessel, except for the top (the area 5) is surrounded by insulating cladding 9. The temperature of the mass below the upper heater 8 is maintained by heat sources 10 controlled by temperature sensitive devices 12, that at the bottom of the vessel being about 300-310C. The temperature sensitive devices 12 are insulated from each other by insulating rings 13. After cooling that portion containing the impurities is separated using a glass knife, by heat radiation by melting with a fierce flame or by simply being broken off.
Patent GB-871995-A (GB)
Title: Improvements in or relating to moulded resistors and electrical switches and contacts therefor
Inventor: PAGE VICTOR ARTHUR WILLIAM
IPC: H01H1/40
Filed: 1956-12-06
Abstract: An electrical contact device for co-operation with a wiper contact comprises a moulded plastic base having contact elements flush with the surface thereof and moulded of a mixture of a metal powder, such as silver or a lead-tin alloy, and a resinous binder such as phenol formaldehyde.  A resistor track formed by carbon powder mixed with a resin moulding material may be arranged in connection with the said contact elements.ALSO:An electrical contact device for co-operation with a wiper contact comprises a moulded plastic base having contact elements flush with the surface thereof and moulded of a mixture of a metal powder, such as silver or a lead-tin alloy, and a resinous binder such as phenol formaldehyde.  A resistor track formed by a carbon powder mixed with a resin moulding material may be arranged in connection with the said contact elements.
Patent GB-374825-A (GB)
Title: Improvements relating to lamps for automobiles and like vehicles
IPC: B60Q1/068
Filed: 1930-12-10
Abstract: 374,825. Directing vehicle lamps. RENAUD, R. A. E. and ABRIC, G. E., La Bouble, St-Eloy Les Mines, Puy de dome, France. Dec. 10, 1930, No. 37310. Convention date, Dec. 10, 1929. Void [Published under Sect. 91 of the Acts]. [Class 75 (iii).] A rotatable vehicle lamp is operated by a cable 17 connected to a fixed point A, the lamp being turned from the forwardly-directed position by shortening the effective length of the cable by a lever-operated device 10 within reach of the driver. The headlight 1 is mounted either by a swivel joint as shown or fixedly, on a member 2 rotatable in a fixed bearing 5, axial movement being prevented by screws 4 engaging a groove on the member 2. A vertically sliding member 6 having helical grooves of long pitch engages a nut 3 fixed to the member 2 and is squared at its lower end which passes through a square hole in a guide 8. A spring 7 normally retains the member 6 in its upper position, the lamp then being directed forwardly. A bell crank 9 engages the member 6 and is operated by shortening the cable 17, attached to the fixed point A and passing over grooved pulleys 13 on a lever 10 pivoted in a casing 11 at 14 and operated by a pedal or handlever through a connecting rod 15.
Patent GB-344504-A (GB)
Title: Improvements relating to beer pumps and the like
IPC: B67D3/02
Filed: 1929-12-05
Abstract: 344,504. Nozzles with cut-off devices. HOOD, J. R., 69, Devonshire Street, Mile End, London. Dec. 5, 1929, No. 37391. [Classes 69 (iii) and 135.] Froth on liquids delivered from a beer pump or the like is produced by forcing the liquid through an expanding annular passage formed between a conical disc valve d and a conical valve seating, and against the inner surface of a nozzle j. The valve is held against its seating by a spring g bearing against a spider f and a nut i screwed on the valve stem e. The nut is provided with arms which engage the spider so that the tension of the spring may be varied by rotating the valve by a handle k. A terminal nut h prevents the nut i from disengaging the stem.
Patent GB-1276399-A (GB)
Title: Anti-skid braking systems
IPC: B60T8/1761
Filed: 1970-08-04
Abstract: 1276399 Anti-skid braking systems TOYODA KOKI K.K. and TOYOTA JIDOSHA KOGYO KK 4 Aug 1970 [12 Aug 1969] 37508/70 Heading F2F An anti-skid braking system has a rotary wheel speed sensor 25 generating a signal W which is differentiated in a circuit 26 the output signal D of which is fed to one input of a comparator citcuit 27 which compares signal D with a further signal proportional to the brake torque at the wheel as sensed by a device 23. When wheel deceleration exceeds the brake torque by a predetermined amount, the comparator circuit 27 delivers a signal P, which amplified at 28, and passed to an input 108 of a servo valve 29 controlling the supply of air pressure to a modulating valve 24 connected between a brake cylinder 18 and master cylinder 10 for controlling the release of pressure in the cylinder 18. On depressing a pedal 11, fluid is passed from master cylinder 10 to the brake cylinder 18 via conduit 15, valve inlet 141, passages 124a, 124 formed in a differential valve piston having larger and smaller sections 113, a chamber 119, outlet 142 and conduit 17. When a predetermined pressure is reached in cylinder 18, the pressure acting on the larger face area of the valve piston causes the latter to move rightwardly, to close communication between inlet 141 and outlet 142 by radial pressure 124a being covered by the cylinder bore 110. Under these conditions a signal fed to input 108 of servo valve 29 causes a diaphragm 100 to move upwardly and unseat a valve member 92 through a connection 103, and a ball valve 95, air pressure then passing through an inlet 105, passage 92 and outlet 101 to an inlet 143 of the modulating valve 24. A diaphragm 137 is then moved leftwardly carrying with it a piston-rod 127, the piston 134 of which is moved correspondingly to relieve the pressure in the brake cylinders and decrease the braking torque. The rotary wheel speed sensor 25 comprises a toothed wheel 36, Fig. 7 (not shown), through which, in the embodiment shown, air is passed through nozzles 37, 38, Fig. 6 (not shown), on opposite sides of the wheel, the pressure in nozzle 38 being dependent upon the speed of the toothed wheel. The brake torque sensor 23 comprises a piston (46), pivoted to brake shoe 20, which compresses a cup-shaped member 134, to vary the gap between itself and a nozzle 48 through which air from a reservoir 30 is passed to vary the pressure in the line connecting reservoir 30 and nozzle 48 as the brake torque varies.
Patent GB-1075251-A (GB)
Title: Cardenolide derivatives
Inventor: WILKINSON SAMUEL
IPC: A61K31/00
Filed: 1962-10-04
Abstract: The invention comprises compounds of the formula <FORM:1075251/C2/1> wherein R2 is a C1- 3 alkyl or alkenyl group and R is a hydrogen atom or a group R1CO, wherein R1 is a hydrogen atom or a C1- 3 alkyl or alkeny group, with the exception of compounds wherein R1 and R2 are both methyl groups, and their preparation by (a) acylation of cymarol or a 41-acyl-cymarol, or (b) reduction of a 41-acyl-cymarin. 41-Acyl-cymarins are prepared by acylation of cymarin.  Cymarol is prepared by reduction of cymarin.  The compounds of the invention have cardiotonic activity and may be used in pharmaceutical compositions in combination with a carrier, for example in form suitable for oral, parenteral or rectal administration.
Patent GB-759749-A (GB)
Title: Improvements in two-ply tubular fabrics and in methods and apparatus for producing the same on a circular loom
IPC: D03D37/00
Filed: 1954-12-30
Abstract: 759,749. Circular looms. SOC. D'APPLICATIONS GENERALES D'ELECTRICITE ET DE MECANIQUE. Dec. 30, 1954 [Dec. 30, 1953], No. 37667/54. Class 142 (2). [Also in Group XXVIII] A lining of non-textile material is applied to a tubular fabric in the form of two semi-circular sheets 3, 3a, overlapping each other at their edges, secured to the fabric 36 by adhesive. A rotating spider 13 houses spring-loaded plungers 22 carrying rollers 8 to press the lining on to the fabric as it passes through the weaving ring 33. If the sheeting is made of or coated with thermoplastic material, infra-red heaters 6 operate above the weaving zone; if the adhesive requires heat to set it, the weaving ring 33 is heated. In the case of non-adhesive sheeting, glue or bitumen may be applied to it above the heaters 6 by means of troughs and doctor rollers or by spraying.
Patent GB-929825-A (GB)
Title: Improvements in or relating to boxes
IPC: B65D5/70
Filed: 1961-10-20
Abstract: 929,825. Cigarette cartons. ARENCO A.B. Oct. 20, 1961 [Oct. 26, 1960], No. 37801/61. Addition to 841,349. Class 18. A rectangular box as described in the parent Specification is provided with an offset portion 50 in the outer face of the inner flap 8 of the lid, this portion being adhesively secured to the inner face of the outer front wall 23 of the lid. In a modification an offset portion may be provided in the inner face of the outer wall 23 instead of or together with the portion 50.
Patent GB-1194545-A (GB)
Title: An Arrangement for Regulating Winding Drive Means
IPC: B65H59/38
Filed: 1967-08-17
Abstract: 1,194,545. Automatic tension control. BARMAG BARMER MASCHINENFABRIK A.G. Aug. 17, 1967 [Aug. 18, 1966], No. 37932/67. Heading G3R. In a system for automatically controlling tension in material being wound, variations in the size of a loop cause adjustment of an electrical contactless transmitter which is associated with a pneumatic member introducing an integral or differential component into the control, through an amplifier, of a thyristor or transductor in the energizing circuit of a motor driving the winder. In Fig. 1, variations in tension of a thread 31 being wound on a spool 32 are detected by a rocker arm 11 which adjusts an induction regulator 3 to produce A.C. signals corresponding to variations in tension from a predetermined value. These signals are applied through an amplifier 14 to control a thyristor 17 energizing the armature 24 of a D.C. motor driving spool 32 so that winding speed is adjusted to correct the tension. The winding motor may be provided with electronic commutation. In a modification, the position of a semi-conductor relative to a light source or an electric or magnetic field is varied in dependence on loop size so that signals corresponding to variations in tension are produced by variations in semi-conductor conductivity. In this modification, the spool is driven by an A. C. slip ring motor controlled by a pair of thyristors or a triac. In each arrangement, movements of the looper follower are damped by a spring-loaded member (not shown) associated with dashpots which introduce differential and integral components of control and have a response which is different according to the sense of adjustment. Compensation for the increasing diameter of the package may be included.
Patent GB-917951-A (GB)
Title: Process for the production of copolymers of tetrahydrofuran and olefine oxides
IPC: C08G65/08
Filed: 1960-11-04
Abstract: Copolymers of tetrahydrofuran and olefin oxides of comparatively low molecular weight are prepared by polymerizing in the presence of a tertiary oxonium salt of hydrofluoboric acid as catalyst and a carboxylic acid orthoester, or an acetal or alcohol as molecular weight regulator.  The catalyst is added in the form of boron trifluoride etherate of tetrahydrofuran which disproportionates to give the tertiary oxonium salt of HBF4 and a boric ester.  Suitable regulators are orthoformic acid trimethyl ester, orthoacetic acid trimethyl ester, orthocarbonic acid tetramethyl ester and the ethyl esters; formaldehyde and acetaldehyde dimethyl and diethyl acetals, and formaldehyde methyl ethyl acetal; methanol, ethanol, propanol, ethylene glycol and benzyl alcohol.  Specified olefin oxides are ethylene-, propylene-, butylene-, styrene- and phenoxy propene oxides and epichlorhydrin, and mixtures may be used (Example 2).  The ratio of the monomers may be varied widely, e.g. from 10 to 90 mol. per cent of each.  The quantity of catalyst may be from 1 to 2 mol. per cent and the quantity of regulator from 5 to 20 mol. per cent based on the total mixture.  The catalyst may be removed from the polymer by aqueous alkali.  Examples are given including, for comparison, the use of bleaching earth as catalyst.  Uses: Lubricating oils and heat transfer liquids.
Patent GB-340747-A (GB)
Title: Improvements in or relating to screw jacks
IPC: B66F5/02
Filed: 1929-12-13
Abstract: 340,747. Lifting- jacks. LAKE, A. E., 113, Dunmow Road, Bishop's Stortford, Hertfordshire. Dec. 13, 1929, No. 38201. [Class 78 (iii).] A screw actuated lever jack has double pivotal mountings, giving a universal joint action, for the screw and for the nut. The crutch D is carried by a parallel motion linkage C, F<2> pivotally mounted on the frame A, the links C serving as the lifting lever. A trunnion J connecting the links C carries a sleeve J<2> through which the operating screw L passes and has a concave bearing face J<1>, Fig. 2, engaging a convex face on the nut K, the parts being secured together by plates S, Fig. 3. The screw L is mounted in a journal bearing M having a similar joint connection M<1> with a trunnion bearing P mounted in the frame. The screw is operated by the usual ratchet mechanism R.
Patent GB-1460643-A (GB)
Title: Combination of a roll of film a leader and an adhesive strip therefore
IPC: G03C1/765
Filed: 1974-09-03
Abstract: 1460643 Roll films AGFA-GEVAERT AG 3 Sept 1974 [7 Sept 1973] 38403/74 Heading G2X  A roll film 1 has a leader 2 to which is stuck the beginning 1a of the film by means of an  adhesive strip 4, holes 5 and 6 being provided in the leader whereby when the film is rolled up a part 7 of the leader is bonded to the strip 4 through the holes 5, 6 to releasably retain the film in the rolled condition. An incision 8 in the leader limits any tearing of the leader when the film is unrolled.
Patent GB-1361208-A (GB)
Title: Fuel cell stack
IPC: H01M8/24
Filed: 1971-08-16
Abstract: 1361208 Fuel cells ENGELHARD MINERALS & CHEMICALS CORP 16 Aug 1971 [17 Aug 1970] 38413/71 Addition to 1292709 Heading H1B A fuel cell battery similar in many respects to that disclosed in Specification 1,292,709, except that the cooling fins on the bi-polar plates separating the individual cells are preferably omitted, has the temperature of its cells made uniform throughout their extent by supplying the oxidant air so that it enters alternate cells or alternate groups of cells from opposite sides of the fuel cell stack to effect a counter-current flow of the oxidant gas within alternate cells of alternate groups of cells. Thus, since the bi-polar plates are thermally conductive the oxidant inlet end of one cell or group of cells receives heat from the oxidant outlet end of an adjacnet cell or group of cells. To maintain the cells at a constant temperature the air is supplied by a blower driven by a motor controlled by a thermocouple within the cells. The Specification describes with reference to Figs. 6, 7 (not shown) constructional features relating to the air inlets and outlets.
Patent GB-1361277-A (GB)
Title: Apparatus for sealing lyphilised products
IPC: B65B31/00
Filed: 1971-08-16
Abstract: 1361277 Packaging; applying internal stoppers L'AIR LIQUIDE SOC ANON POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 16 Aug 1971 [18 Aug 1970] 38420/71 Headings B8C and B8T [Also in Division F4] A product is frozen and lyophilized in a rotating vacuum chamber 1 by means of a refrigerating and heating tank 2 and a water vapour condenser 10 connected at 11 to a vacuum pump (not shown), and the dried product is then sealed under an inert gas at atmospheric pressure in a storage receptacle 33. After lyophilization, the chamber is filled with an inert gas, a stopper 24 is advanced by a slidable rod 25 to block the neck 5 (Fig. 2), the condenser 10 &c. is disconnected at 7 from the neck 5 and replaced by the storage receptacle 33, a vacuum is created in the receptacle 33 and then it is filled with the same inert gas as the chamber 1 by means of valves connected to it, the stopper 24 is withdrawn to the Fig. 1 position, the product is transferred to the receptacle by gravity, the stopper 24 is pushed through the neck 5 into the neck of the receptacle, and the rod 25 is unscrewed from the stopper 24. Further heating means 3 may be provided, and liquid product may be injected into the chamber 1 for freezing via an injector connected to a flange 12. A movable filter 16 is carried by a hollow rod 17 which also transmits the pressure to a vacuum gauge head 19.
Patent GB-1524052-A (GB)
Title: Polyoxalkylene copolymer mixtures and polysiloxane-polyoxyalkylene block copolymers
IPC: C08L71/02
Filed: 1975-09-19
Abstract: 1524052 Mixed polyethers; polyoxyalkylenepolysiloxanes; foamed polyurethanes UNION CARBIDE CORP 19 Sept 1975 [20 Sept 1974] 38560/75 Headings C3R and C3T A polyoxyalkylene copolymer mixture for reaction with a polysiloxane consists of 20- 80 wt. per cent of (A) a material of average molecular weight (AMW) 800-2300 which is a single copolymer or a mixture of copolymers of AMW's 500-2900, and 80-20 wt. per cent of (B) a material of AMW 3400-5500 which is a single copolymer or a mixture of copolymers of AMW's 3000-5500, each copolymer in (A) and (B) containing 20-60 wt. per cent of oxyethylene units, the remainder being oxypropylene units, and having hydroxy or alkenyloxy groups at one end of the chain and alkoxy, aryloxy, or aralkoxy groups at the other, or acyloxy when the first is alkenyloxy, the AMW of the mixture being 1600 -2900. Polyoxyalkylene by reaction of this mixture with a polysiloxane in a wt. ratio of 65 : 35 to 85 : 15, the polysiloxane having at most 4 units RSiO1À5, from 6 to 15 wt. per cent of units RLSiO and/or R2LSiO0À5, and the rest units R2SiO and R3SiO0À5, where each R is an optionally substituted hydrocarbyl radical free of aliphatic unsaturation and L is H, halogen, or an alkoxy or amino group, suited to react with the polyoxyalkylene copolymer mixture. The block copolymers are used as foam stabilizers for polyurethane foams. In Examples 8-12 and 19-23 polyethers of AMW 1640-2750 which are mixtures of polyethers of AMW's 1000 + 1750 + 4050 or (in Ex. 10) 570+2950+4050 or (in Exs. 19-22) 122750+4600, all containing 40 wt. percent -C2H4O- units and having methoxy and allyloxy end groups are added to hydrogen siloxanes having 2 Me3SiO0À15 units, 44-132 Me3SiO units and 5-15 MeHSiO units, i.p.o. H2PtCl6 to give block copolymers containing 17-32À4 wt. per cent siloxane; in Examples 13-17 polyethers of AMW 1630-2270 which are mixtures of polyethers of AMW's 1000+ 38001900 or 3200, all containing 50 wt. per cent -C2H4O- units and having butoxy and hydroxy end groups, are reacted with ethoxysiloxanes having 3À3 or 6 EtOMe2SiO0À5 units, 18 or 38 Me2SiO units and 1À3 or 4 MeSiO1À5 units, i.p.o. pyridinium dodecylbenzene sulphonate to give block copolymers containing 20À3-22À5 wt. per cent siloxane; in Example 18 an allyloxy polyether mixture is followed by a hydroxy polyether mixture. The block copolymers are evaluated as foam stabilizers with a poly-oxypropylene-oxyethylene glycerol, TDI, water, CCl3F, bis(dimethylaminoethyl)ether and Sn octoate foam formulation.