baber/WOPTO huggingface dataset:
Patent GB-331110-A (GB)
Title: Improvements relating to electrical contact pins
IPC: H01R13/05
Filed: 1929-07-08
Abstract: 331,110. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Oct. 19, 1928, [Convention date]. Vacuum tubes.-A hollow resilient contact pin is formed with convex laminations 10 pressed from sheet metal, made integal at the tip and held together at the base by a sheet metal cap 15. The cap may have a projecting angular rim 16 that assists in holding the pin in a mass of moulded material such as the base of a radio valve or vacuum tube. A hole 18 in the cap permits passage of a wire to be soldered in a hole 13 at the tip of the pin.
Patent GB-1471870-A (GB)
Title: Tape record units
IPC: G11B23/06
Filed: 1973-05-03
Abstract: 1471870 Tape cassette brake TELEVISION RESEARCH Ltd 24 April 1974 [3 May 1973] 20998/73 Heading B8M A tape cassette 1 comprises a clamping arm 6 pivotable about an axis 8 parallel to the axis of a roll of tape 2, the arm being biased towards a position (shown in dotted lines) in which a surface of a brake shoe 7 which extends transversely from the arm bears on the roll of tape in a direction perpendicular to its axis, an extension piece 16, Fig. 2, being provided which may be fitted over the brake shoe to increase its effective length. As shown the spring 11 is the biasing means which causes the roll of tape to be braked when the cassette is not inserted in a recorder or player. When the cassette is inserted a capstan 15 presses against pinch roll 10 with a force (3 to 6 lbs.) sufficient to rotate arm 6 into the play position shown.
Patent GB-1515743-A (GB)
Title: Wave action energy harnessing apparatus
IPC: F03B13/18
Filed: 1975-05-16
Abstract: 1515743 Utilizing wave energy M G TORNABENE 16 May 1975 21048/75 Heading F1S A wave energy utilization device comprises a wave responsive float 16 and shaft mechanism 26a, 26b, in which the float is freely rotatable around the shaft on which it is mounted, the shaft being substantially upright and passing through the floats central axis such that the forces of water waves and currents are at least partially absorbed by free rotation of the float thereby substantially obviating a torque acting on the shaft which might otherwise inhibit free reciprocating motion of the shaft upwardly and downwardly within its bearing supports 27, 28. As shown the shaft portion 26a comprises a rack which drives a generator 39. In a modification (not shown), the float is connected to a piston of a reciprocating pump which supplies liquid to a turbine. Various shapes of floats may be employed. A weight may be associated with the float.
Patent GB-948063-A (GB)
Title: Foamed polymers of vinyl aromatic hydrocarbons
Inventor: RUBENS LOUIS CHARLES
IPC: C08J9/12
Filed: 1960-06-16
Abstract: A composition of thermoplastic polymer and expanding agent is heated above the softening point of the polymer and the boiling point of the expanding agent and is subjected to a dose of ionizing radiation sufficient to cause slight cross-linking without rendering the polymer non-swellable in organic solvents The polymer is derived from a monomer or monomer misten containing at least 70% by weight of monovinyl aromatic hydrocarbon. Examples are polystyrene polyvinyltoluene or a copolymer of styrene or vinyltoluene with another monomer such as acrylonitrile, methyl methacrylate or a -methyl styrene.  The expanding agent is carbon dioxide or a volatile organic compound boiling below 100 DEG C., e.g. ethylene, propylene, pentane, hexane, heptam, petroleum ether, dichlorodifluoromethane, monochlorodifluoromethane, or symdichloro-tetra-fluoroethane, The ionizing radiation may be b -rays, g -rays, acclerated electrons, neutrons, heavy particles or X-rays.  Generally a dose of 5-300 megareps is satisfactory.  In examples (1) Styrene mixed with dichlorodifluoro-methane was polymerized with benzoyl peroxide to a solid product, granules of which were irradiated with electrons from a Van de Graaff accelerator and then foamed by immersion in a silicone oil bath at 130 DEG C. (2) is similar, using vinyl toluene. (3) Polystyrene granules were irradiated, treated at room temperature with carbon dixoide under pressure and foamed by heating (4) is similar to (3) using polyvinyltoluene.
Patent GB-902359-A (GB)
Title: Mixed esters of citric acid and polymers thereof
IPC: C08F18/08
Filed: 1960-06-16
Abstract: Homopolymers and copolymers of mixed esters of citric acid of formula <FORM:0902359/IV(a)/1> where R is an acetyl radical and R1 is an allyl radical or an alkyl radical containing from 1 to 18 carbon atoms, at least one R1 being an allyl radical and at least one an alkyl radical, are obtained by heating at from 100 DEG  to 140 DEG C. in the presence of perbenzoic acid or hydrogen peroxide and comprise clear viscous liquids soluble in alcohols and organic solvents. Copolymers with compounds such as diallyl phthalate, ethyl acrylate, acetyl triallyl citrate and unsaturated polyesters may also be prepared by bulk or solution polymerization.  An example describes the preparation of acetyl triallyl citrate-acetyl diallyl monobutyl citrate, to yield a free-flowing powder soluble in acetone, aromatic hydrocarbons and esters, and insoluble in aliphatic solvents.  It can be hardened by the action of heat and/or catalysts such as perbenzoic acid, to yield a transparent thermosetting film.ALSO:The invention comprises mixed esters of formula: <FORM:0902359/IV (b)/1> where R is an acetyl radical and R1 is an allyl or an alkyl radical containing from 1 to 18 carbon atoms, at least one R1 being an allyl radical and at least one R1 an alkyl radical.  The esters may be prepared by step-wise esterification with, for example n-butyl, 2-ethyl hexyl and octadecyl alcohols, in the presence of a p-toluene sulphonic acid catalyst and toluene as solvent and then with allyl alcohol.  The mixed esters, purified and decolorized by oxidising agents e.g. hydrogen peroxide or sodium hypochlorite, and inhibited with hydroquinone or methylene di-b -naphthol, are finally acylated with acetic anhydride.  Examples describe the preparation of acetyl monoallyl dibutyul, diallyl monobutyl, and diallyl mono-2-ethyl hexyl citrates.  The esters may be polymerized or copolymerized with, for example, dialkyl phthalate, ethyl acrylate, acetyl trialkyl citrate and unsaturated polyesters to form resins suitable as "internal" plasticizers.
Patent GB-391656-A (GB)
Title: Improvements relating to the precipitation of cellulose esters
IPC: D06M15/07
Filed: 1932-07-28
Abstract: Cellulose organic esters are precipitated from solution by means of an ether containing a higher alkyl group, e.g. iso-propyl ether, n-propyl ether, various butyl and amyl ethers, methyl tertiary-butyl ether, ethyl tertiary-butyl ether, iso-propyl tertiary-butyl ether and methyl tertiary-amyl ether.  Precipitated cellulose organic esters may be washed free from solvent by means of the higher ethers. In examples: (1) a cellulose acetate dope obtained after the hydrolysis step of an acetylation process is poured into iso-propyl ether and purified by extraction or washing with the precipitant; (2) a cellulose acetate-stearate dope containing ethoxy-acetic acid is diluted with iso-propyl ether and then poured into an excess of the ether.  In place of the higher ether alone as precipitant, a mixture of the higher ether with a solvent, e.g. acetic acid or ethylene chloride, may be used.  The process may be applied to the production of artificial filaments, films or coatings from esterification mixtures directly, e.g. a cellulose acetate esterification mixture may be diluted with iso-propyl ether and extruded in the form of filaments or poured as a film into a coagulating bath comprising iso-propyl ether. Again, solutions of precipitated and washed cellulose esters may be extruded or poured in a similar manner. Articles to be coated, for example, glass bottles or sheets, are first dipped into a solution of cellulose ester, preferably containing an addition iso-propyl ether, and then into a bath of the ether.  To obtain a moulding powder, a solution of the cellulose ester is precipitated by means of the higher ether whilst rapidly stirring.  Lower esters are preferably precipitated by adding the ether to the solution, and higher esters by adding the solution to the ether. Specifications 287,880 and 313,408, [both in Class 2 (ii), Cellulose &c.], are referred to.
Patent GB-356869-A (GB)
Title: Methods of removing deposits from boilers and of preventing the formation of scale and apparatus therefor
IPC: F22B37/54
Filed: 1930-07-14
Abstract: 356,869. Steam boiler scum apparatus ; blow-down valves. CZECZOTT, A., Targowa, Warsaw. July 14, 1930, No. 21336. Convention date, July 13, 1929. [Class 123 (ii).] Scum is discharged from a catcher P through a valve V which is opened for two or three seconds at intervals of a few minutes. The valve is operated automatically by a moving part of the engine or by a moved part of the boiler. The catcher is supported at the water level by a float P<1> and is connected to the discharge valve by a flexible tube C. The float may contain a liquid having a boiling point below that of water and may be fitted with a pressure gauge to indicate damage to the float causing entrance of boiler water. The float may contain coloured liquid or a small quantity of water. Damage to the float is indicated when it contains water by the continuous discharge of steam through a tube projecting through the boiler shell and fitted with a cock K, which is normally closed. The tube C contains a thin wire so connected to the catcher and to a rod in the valve V that, when the tube is damaged, the thin wire is broken and the rod is forced out the valve to indicate the damage. A cutting blade F, Fig. 6, on the boiler blow-down valve is rotated, when the valve lever R is turned, by a pawl Z, which engages a toothed wheel on the valve stem. Dirt collecting in a recess n in front of the valve seating is ground up by the blade.
Patent GB-1135828-A (GB)
Title: Circuit arrangement for controlling the level of a signal
IPC: H04N5/14
Filed: 1966-05-13
Abstract: 1,135,828. Transistor gain control circuits. FERNSEH G.m.b.H. 13 May, 1966 [14 May, 1965], No. 21350/66. Heading H3T. In a circuit arrangement for controlling the level of a signal transmitted by way of an amplified stage comprising first and second amplifier elements having oppositely non- linear transmission characteristics, the two elements are coupled by way of a circuit arrangement of which the resistance varies with applied voltage, varying in accordance with changing potentials applied to the amplifier elements to vary their working points. An embodiment comprises two transistors 1, 2 with the input applied to the base of transistor 1 and the base of transistor 2 earthed, the output being taken from either or both collector circuits. The emitter circuits comprise individual resistors 7, 8 and a coupling resistor (9, Fig. 1, not shown) connected from emitter to emitter, the gain being varied by means of a potentiometer (12) which varies the emitter bias. According to the invention, the coupling resistor (9) is also made variable and comprises a fixed resistor 9 in series with two voltage-variable diodes 23, 24 the impedances of which are varied by means of a bias derived from the potentiometer 31 over resistors 27, 28. The frequency response is corrected by means of a capacitor 30 shunting resistor 9.
Patent GB-1211526-A (GB)
Title: Fast breeder reactors
IPC: G21C1/02
Filed: 1969-04-25
Abstract: 1,211,526. Controlling reactors. SIEMENS A.G. 25 April, 1969 [27 April, 1968], No. 21369/69. Addition to 1,211,255. Heading G6C. In a steam or liquid metal cooled fast breeder reactor, the core is shaped to reduce the probability of a reactivity increase induced by coolant loss, i.e. the coolant void effect. The core shape induces an increase in the neutron leakage at the core centre,where the maximum void effect occurs. Breeder blankets 3, 4 surround the core 1, 2 in the fissile material is uniformly enriched.
Patent GB-1496024-A (GB)
Title: Mowing implement
IPC: A01D34/80
Filed: 1975-05-20
Abstract: 1496024 Rotary mower MULTINORM BV 20 May 1975 [31 May 1974] 21496/75 Heading A1F A rotary mower comprises at least one set of two cutter members 7 above and rotatably journalled on a housing 3 to rotate in opposite directions and driven via a driving gear 63, the cutter members having cutter supports 36 with at least one cutter 37 pivotally mounted at its periphery, the cutters of adjacent cutter members being offset by 90‹ so that they pass underneath the adjacent cutter supports, and a hydraulic, pneumatic or electric motor 29 is arranged beneath the cutter support of preferably one or each of the outermost cutter members, the motor communicating through a duct system with the vehicle driving member. The cutter members with motors have hoodlike cutter supports. The motor output shaft has upper and lower ends connected to the cutter support 36 and a gear wheel 10 of the driving gear 63 respectively. Gear wheels 11 couple with the driven gear wheel 10 and those of cutter members not driven by motors. The duct system includes a switching member which switches off the motors when the mower strikes an obstacle or is overloaded. In an alternative embodiment the mower is suspended from the front of a vehicle by supporting bars 69 (Fig. 7) extending through hollow driving shafts 91 of motors 29 arranged beneath the cutter supports of each of the outermost cutter members.
Patent GB-1499549-A (GB)
Title: Deposition of ruthenium
IPC: H01H1/02
Filed: 1975-05-20
Abstract: 1499549 Depositing ruthenium INCO EUROPE Ltd 14 May 1976 [20 May 1975] 21497/75 Heading C7F Ru is deposited on a hot substrate e.g. sintered carbides, high speed steel, Ti, glass, diamond, by decomposing in a substantially static partial vacuum, the vapour of a complex of Ru with a # dicarbonyl R 1 -CO-CHR 2 -CO-R 3  where R 1  and R3 are alkyl, haloalkyl, alkoxy, aryl or alkyl, nitro or halo substituted aryl groups and R 2  is hydrogen or an alkyl or haloalkyl group. The preferred Ru complexes are those with acetylacetone CH 3 -CO-CH 2 -CO-CH 3 , trifluoro (acetylacetone) CF 3 -CO-CH 2 -CO-CH 3 , and hexafluoro (acetylacetone) CF 3 -CO-CH 2 -CO-CF 3 . The substrate is heated to 550-650‹C or 700- 750‹C and the Ru complex to 200-210‹C or 130-150‹C according to the complex used to vaporize the complex which is then decomposed on the heated substrate. A static vacuum i.e. where pumping has ceased, of 10<SP>-1</SP> - 10<SP>-3</SP> torr is preferred during deposition. The coated substrate may be heated to 1250-1400‹C to effect diffusion or the substrate may be removed by chemical dissolution e.g. to form Ru enucilites. The process may be used for coating the faces  and cutting edge of cemented carbide or H.S.S. cutting tools, coated soldering irons or coated electrical contacts.
Patent GB-365982-A (GB)
Title: Manufacture of artificial threads
IPC: C08L1/24
Filed: 1931-07-28
Abstract: Artificial threads are obtained from solutions containing cellulose xanthate and a xanthate of a water-insoluble higher alcohol, alcohol-acid or ester thereof, or of a partially substituted water-insoluble derivative of a body of the type of polyvinyl alcohol.  The xanthates may be derived from fat alcohols p  such as lauryl, stearyl, or oleyl alcohol, or from polyhydric alcohols obtained by reduction of hydroxy-fatty acids.  Partially esterified water-insoluble polyvinyl alcohols, such as polyvinyl acetates, butyrates, and oleates, or partially etherified or acetalized derivatives such as water-insoluble polyvinyl-formal may be used.  By spinning the xanthate mixtures in acid precipitating baths there are obtained regenerated cellulose and a water-insoluble alcoholic body. The threads produced have improved softness, and suppleness with increased resistance to water.  In examples, oleyl alcohol, octodecane-diol prepared by reduction of ricinoleic acid, and the mixture of primary alcohols obtained by reduction of the fatty acids of palm nut oil are converted into xanthates in known manner and mixed with solutions of viscose.  The mixed xanthate solutions are spun in known manner.  In another example, castor oil is converted into a xanthate and mixed with viscose which is then spun into a strongly acid precipitating bath.  In other examples, a polyvinyl formal, polyvinyl acetate saponified to such a degree that it is still insoluble in water, and polyvinyl oleate containing free hydroxy groups, are treated with caustic soda and carbon disulphide and the xanthates are mixed with viscose solutions.  The mixtures are spun with or without ripening.
Patent GB-423595-A (GB)
Title: Improvements in lock nuts
IPC: F16B39/32
Filed: 1933-08-01
Abstract: 423,595. Locking nuts. GENERAL AUTOMATIC LOCK NUT CORPORATION, 1819, Broadway, New York, U.S.A.-(Assignees of Dickerhoff, S. C. ; 1775, Broadway, New York, U.S.A.) Aug. 1, 1933, No. 21589. Convention date, Aug. 1, 1932. [Class 89 (i)] The nut 1 is locked to the bolt by the pin 2 which is held in the longitudinal hole in the nut by the indentation 6. This indentation is formed when the wire is held so that the arm 3 is radial The free end of the arm 3 is chamfered. Specification 206,217, [Class 89 (i)], is referred to.
Patent GB-1498733-A (GB)
Title: Diaphragms for electrolytic cells
IPC: C25B13/04
Filed: 1975-05-20
Abstract: 1498733 Asbestos coated cathode HOOKER CHEMICALS & PLASTICS CORP 20 May 1975 [9 April 1975] 21594/75 Heading C7B [Also in Division B2]  A diaphragm-coated cathode for an electrolytic cell, comprising a foraminous cathode bearing on the cathodically active surfaces thereof an adherent and coherent dimensionally stable diaphragm consisting essentially of asbestos fibres bound together with a discontinuous polymer coating, the concentration of polymer decreasing from the outer surface of the diaphragm to the cathode-diaphragm interface, is produced by placing a foraminous cathode member in a slurry of asbestos fibres and drawing a layer of asbestos on to the cathode by suction through the cathode, removing the coated cathode from the slurry while maintaining suction to abstract slurry liquid from the asbestos layer, placing the coated cathode in a slurry of thermoplastic polymer particles ranging in size between 0À2 and 100 microns, drawing polymer particles into the asbestos layer by suction through the coated cathode, removing the cathode from the polymer slurry and heating it to a temperature sufficient to soften the polymer particles and thus join adjacent asbestos fibres together, and then cooling the coated cathode. The cathode member may be in the form of a can or box of wire mesh, foraminous sheet metal, expanded metal or woven metal. The asbestos slurry may be in water or solutions of brine or other cell liquor, and suitably is applied at a thickness of 25-125 mms, i.e. 0À18-0À3, preferably 0À22-0À26 pounds per square foot. Preferred polymers are fluorine-containing polymers having a softening point between 105C and 400C, e.g. polytetrafluoroethylene, polyhexafluoropropylene, polychlorotrifluoroethylene, polyvinylidene fluoride, alone or as copolymers with each other or with ethylene vinyl chloride or other hydrocarbon monomers. The preferred polymer is polyvinylidene fluoride or a 1:1 copolymer of ethylene and chlorotrifluoroethylene. The polymer slurry may contain a wetting agent, preferably non-ionic, and is drawn into the asbestos layer until a polymer concentration of 1-20% of the weight of asbestos is reached. The coated cathodes may be used in chlor-alkali cells for electrolysis of brine.
Patent GB-418613-A (GB)
Title: Improvements relating to trawl boards for trawl fishing
IPC: A01K73/045
Filed: 1933-08-02
Abstract: 418,613. Trawling. DRYBURGH, D., 2, Bangholm Park, Leith, Edinburgh. Aug. 2, 1933, No. 21687. [Class 48.] The net and tow rope connections of a trawl board are slidably adjustable in the fore and aft directions. Towing brackets 11 are mounted in blocks 10 which are bolted to the board by bolts 9 passing through slots 8. The net rope is connected to U-shaped bolts 20 passing through inclined slots 18. The slots 8, 18 can be formed as T-shaped rails set in the board. A scale 17 is provided for setting the position of the blocks 10.
Patent GB-583586-A (GB)
Title: Improvements in and relating to the manufacture of nitriles
IPC: C07C317/14
Filed: 1944-11-06
Abstract: Benzoic acid and substituted benzoic acids, or anhydrides thereof, but excluding compounds carrying as substituents hydroxyl amino, alkoxy, aryloxy and carboxyl groups, are converted into the corresponding nitriles by heating with a sulphonamide, e.g. benzene-or p-toluenesulphonamide, at an approximate temperature range of 220-240 DEG  C.  The reaction is especially applicable to the production of substituted benzonitriles carrying as substituent a sulphone group, R.SO2-, wherein R may represent an alkyl, aryl or aralkyl group.  In examples, the following nitriles are obtained by heating the reactants at 225 DEG  C. for an optimum period, e.g. 1 1/2 hours, determined by a preliminary test: (1) p-cyanophenyl methyl sulphone, from benzenesulphonamide and p-carboxyphenyl methyl sulphone; p-cyanoethyl-, and p-cyanophenyl propyl sulphones are prepared similarly; (2) pp1-dicyanodiphenyl sulphone, from benzenesulphonamide and pp1-dicarboxydiphenyl sulphone; (3) benzonitrile, from benzenesulphonamide and benzoic acid; (4) p-nitrobenzonitrile, from benzenesulphonamide and p-nitrobenzoic acid; (5) p-nitrobenzonitrile, from toluene-p-sulphonamide and p-nitrobenzoic acid anhydride; (6) 2 : 4-dichlorbenzonitrile, from benzenesulphonamide and 2 : 4-dichlorobenzoic acid; (7) o-nitrobenzonitrile, from benzenesulphonamide and o-nitrobenzoic acid; (8) ammonium p-cyanobenzenesulphonate, from benzenesulphonamide or toluene p-sulphonamide and p-sulphamidobenzoic acid, heated together at 235 DEG  C.
Patent GB-1254108-A (GB)
Title: Venturi scrubber
Inventor: RUSSELL JOHN EDWARD
IPC: B01D47/10
Filed: 1968-05-08
Abstract: 1,254,108. Venturi scrubber. BRITISH TITAN Ltd. 16 April, 1969 [8 May, 1968], No. 21770/68. Heading B1R. In a venturi-scrubber liquid is introduced into the gas through at least three jets 11 inclined to the longitudinal axis, preferably at an angle between 10‹ and 30‹, and directed towards the throat of the venturi in the direction of gas flow. As shown, the jets 11 are mounted in a support tube 6.
Patent GB-808583-A (GB)
Title: Improvements in or relating to the formation of moulded articles from sinterable materials
Inventor: STRIVENS MAURICE ANDREW
IPC: B28B1/24
Filed: 1956-07-13
Abstract: Sinterable material is mixed with a non-thermosetting moulding vehicle comprised of at least one component insoluble in, and at least one component soluble in, a prescribed solvent in its vapour, shaped by heat and pressure, treated with the solvent to remove the soluble part of the vehicle, and fixed to remove remainder of vehicle, and densify the shape.  Specified sinterable materials are the ceramics disclosed in Specification 779,242, e.g. alumina, rutile, steatite, wollastonite, and also carbides.
Patent GB-1180711-A (GB)
Title: Improvements in Heated Static Port Apparatus
IPC: H05B3/00
Filed: 1968-05-08
Abstract: 1,180,711. Electrically heated static port apparatus. GENERAL ELECTRIC CO. 8 May, 1968 [5 June, 1967], No. 21807/68. Heading H5H. [Also in Division G1] In a device for heating ports 50, such as are provided in the side of an aircraft for supplying static air pressure to an instrument 16, the ports 50 are provided in a flanged body 36 secured to the aircraft skin and, surrounded by a flanged 26, 28 heater body 24 surrounded by a hollow heater member 22 enclosing a cavity 25 having header elements 32 coated with a cured polymeric type dielectric impregnated or embedded in a sufficiently temperature resistant polymeric material, such as epoxy resin mixed with 30 to 70% by weight powdered refractory oxide such as electrically fused alumina powder.