baber/WOPTO huggingface dataset:
Patent GB-618425-A (GB)
Title: Improvements relating to pressure control valves for hydraulic systems
Inventor: ASHTON BENJAMIN N
IPC: F15B11/02
Filed: 1945-12-13
Abstract: 618,425. Fluid-pressure servomotor-control systems. JENNINGS, H. W. K. (Electrol, Inc.). Dec. 13, 1945, No. 33810. [Class 135] In an unloader valve, for maintaining a predetermined range of working pressure in a hydraulic system, liquid flows from the pressure inlet port 16, Fig. 1, past a non-return valve 47 to the system port 18, until the system pressure acting through a passage 14 on a spring-loaded ball control valve 26 rises sufficiently to lift the latter from a lower seat 24 to an upper seat 27, and liquid passing through a port 80 operates a piston 57 which actuates a ball valve 58 to open a byepass connection between the inlet port and an exhaust port 17. When the system pressure falls to a value at which the control valve drops on to the lower seat, which is of less area than the upper seat, a spring 59 closes the byepass valve and the liquid behind the piston exhausts to the port 17 through the port 80, the upper seat 27 and a passage 15. The effect on the control valve of the surge of liquid through the passage 15 occurring when the byepass valve is opened is neutralized by making the diameter of a rod 28 carrying the control valve loading spring equal to that of the upper seat 27.
Patent GB-1075199-A (GB)
Title: New 2-oxo-tetrahydro-imidazole and processes for its preparation
IPC: A61K31/00
Filed: 1965-08-06
Abstract: The invention comprises 1 - [5 - nitro - thiazolyl - (2)] - 2 - oxo - 4,4 - dimethyltetrahydroimidazole, and its preparation by (a) cyclising an N - [5 - nitrothiazolyl - (2)] - N1-b -X-tert.-butyl-urea, in which X is a reactive esterified hydroxy group, or (b) nitrating 1-[thiazolyl - (2)] - 2 - oxo - 4,4 - dimethyl - tetrahydroimidazole, or (c) cyclising 2-amino-5-nitrothiazole and a reactive functional derivative of a b -X-tert.-butyl-carbamic acid in an acid medium.  b  - Chloro - tert. - butylisocyanate is prepared by reacting b -hydroxy-tert.-butylamine with thionyl chloride to form b -chloro-tert.-butylamine hydrochloride and reacting this compound with phosgene. Pharmaceutical compositions having antiparasitic activity, for enteral or parenteral administration, comprise the compound of the invention together with a pharmaceutical carrier.  The compositions may be in the form of an animal feedstuff.
Patent GB-467169-A (GB)
Title: Improvements in set screws
IPC: F16B39/30
Filed: 1935-12-06
Abstract: 467,169. Locking set-screws. STANDARD PRESSED STEEL CO. Dec. 6, 1935, No. 33861. Convention date, April 26. [Class 89 (i)] A set-screw, particularly of the hollow and headless type, has at least a portion of its thread transversely expanded or upset at the apex, the said expanded portion being adapted to jam in a normal thread in which the said screw is mated thereby relatively to lock the said threads. A set-screw, Fig. 1, has threads 1 at the inner working end of normal formation, and a relatively small section 2 of thread at the outer end is subjected to a knurling operation by which it is serrated with the formation of beads on the inner and outer faces of the thread, whereby the threads are increased in width ; this thickening is limited to a narrow area at the peripheral edge of the thread. In a modification, Fig. 3, the serrations are inclined to the longitudinal axis of the screw, extending from the lower to the upper face of the thread in the unscrewing direction ; the knurling results in the formation of beads on one side only of the serrations, namely that side which slopes inwardly towards the rising portion of the helix ; the fin and beads formed on the lower face of the thread may be removed by machining, so that the thickening occurs on the upper face only. The serrations may have the form of backwardly directed saw-teeth ; alternatively, serrations may be dispensed with, the thickening being effected by a smooth-faced roller. The Specification as open to inspection under Sect. 91 was not limited to the application to set-screws.
Patent GB-167713-A (GB)
Title: Improvements in fuses for electrical circuits
IPC: H01H85/045
Filed: 1920-12-01
Abstract: 167,713. Turnock, G. Dec. 1, 1920. Contacts.-In an electric fuse holder the fuse terminals have an extension which is pressed into contact with the fusible element and the clamping means also secure the terminal contact blades in place on the fuse carrier. The fuse carrier comprises two parts a, c each having a cavity containing an asbestos &c. pad. The fuse terminals have contact blades h, projections h<4> around which the fuse wire is bent, and strip extensions h<3> against which it lies. The blades h pass through slots in the member c and bolts and nuts f clamp all the parts together, compressing the wire and its terminal connections between the asbestos pads j, l.
Patent GB-379933-A (GB)
Title: Improvements in and relating to metal screw propellers
IPC: B64C11/24
Filed: 1931-12-07
Abstract: 379,933. Screw propellers. JUNKERS, H., 21, Kaiserplatz, Dessau, Anhalt, Germany. Dec. 7, 1931, No. 33919. Convention date, Dec. 20, 1930. [Class 114.] In a hollow metal screw propeller composed of two cast or pressed, dished halves a, b, one or more webs d, e are formed in each part and extend to the shank. The edges of the blade may be joined by riveting, welding, soldering, &c. and screw bolts n pass through the webs. A ring p may be inserted in recesses in the faces of the webs g, h as shown in Fig. 8 to relieve the bolt n from shear stresses. The tips of blades are formed solid.
Patent GB-497880-A (GB)
Title: Electric incandescent lamp
IPC: H01K1/30
Filed: 1937-12-08
Abstract: 497,880. Electric incandescent lamps with internal reflectors. VEREINIGTE GLUHLAMPEN UND ELEKTRIZITATS AKT.-GES. Dec. 8, 1937, No. 33993. Convention date, Dec. 8, 1936. [Class 39 (ii)] In order to increase the efficiency of an electric incandescent lamp by increasing the proportion of input energy that is converted into visible radiation an optical arrangement is provided, either contained within or forming part of the lamp bulb and, in a measure which increases with increasing wave length, throws back the radiation on to the incandescent body. The optical arrangement consists of a device or devices having two different effects, namely, the dispersion of the light and the reflection back on to the incandescent body of the undeflected and undispersed part of the radiation. The dispersive media used may comprise opal glasses or opal quartzes the particles of which are of such small dimensions that the intensity of the dispersed radiation is at least proportional to the reciprocal of the square of the wave length of the radiation. The arrangement is preferably rotationally symmetrical, and may comprise a system of reflecting-prisms or pyramids with plane or, preferably, curved reflecting surfaces, arranged to form the surface of a cylindrical body with the lamp filament arranged along the axis thereof. The reflecting-members may themselves be made of opal glass or opal quartz, or alternatively, they may be made of transparent material and mounted on the outside of a rotation body made of opal material or of opal-flashed transparent material. In another arrangement a sheath of opal material is arranged around an incandescent body, and two or more layers of reflecting strips with gaps between them are provided in or upon the sheath, the arrangement of the strips being such that the gaps in one layer are covered by a strip in the other layer, so that the visible light is dispersed through the gaps and the infra-red radiation is reflected back on to the incandescent body. The device may be arranged in vacuum lamps or gas or vapour filled lamps.
Patent GB-174820-A (GB)
Title: Improvements in and relating to pulley blocks
IPC: B66D3/04
Filed: 1920-12-02
Abstract: 174,820. Robertson, T. R. Dec. 2, 1920. Pulley-blocks.-Cheek plates of pulley-blocks, of the type made of stamped sheet metal, are formed with sheaths or guides for preventing jamming of the rope between the pulley and the cheeks by pressing the metal inwardly round the curved top of the cheek plates. Fig. 2 shows a construction in which the sheaths 2 are formed by pressing up the metal plates to form a crescent-shaped ridge. Fig. 3 shows a modification in which a curved slit is made in each plate and the upper edge 2<a> pressed inwardly. Fig. 4 shows a tab 1<a>, left on the metal blank, which can be bent over to form an inwardly-projecting flange 1<b>. Fig. 7 shows cheek plates of very thin metal which are strengthened by corrugating and ridging. Radial ridges or corrugations 4 and annular corrugations 6 are employed, while the edges of the plates are beaded as at 5. A pressed ridge 7, extending across the top of each plate, forms the sheath. Ir. all the above-described constructions the edges of the lower portions of the plates may be turned outwardly away from the pulleys to prevent abrasion of the rope.
Patent GB-823004-A (GB)
Title: Improvements in or relating to fastening devices
IPC: F16B5/06
Filed: 1957-10-31
Abstract: 823,004. Stud and socket fastenings; spring clips. UNITED-CARR FASTENER CORPORATION. Oct. 31, 1957 [Nov. 2, 1956], No. 34085/57. Class 44 A fastening device for securing a panel 12 to an apertured support 14 comprises a pair of opposed legs 22, 24 for engaging the panel 12 and a snap fastener stud member extending from one of the legs for engagement in an aperture 16 in the support 14, the stud member comprising a pair of relatively yieldable legs 28, 30 disposed in vertical relationship to each other the upper 28 of said legs being transversely curved to provide an outer surface of convex shape with its longitudinal side edges extending laterally beyond the longitudinal side edges of the lower leg 30. To engage the surfaces of the support 14 the upper leg 28 is provided with an embossed shoulder 34 and the lower leg is provided with a bent end 36 which provides a snap shoulder 38. The leg 22 is provided with tabs 40 and 42 (not shown) for engagement with the panel 12. The convex shape of the leg 28 allows any water to drip from the side edges and prevents it draining towards the panel 12.
Patent GB-1394056-A (GB)
Title: Contact lenses
IPC: G02C7/04
Filed: 1971-07-21
Abstract: 1394056 Contact lenses NATIONAL RESEARCH DEVELOPMENT CORP 18 July 1972 [21 July 1971] 34231/71 Heading G2J [Also in Division C3] Contact lenses comprise a physiologically inert, transparent, oxygen permeable plastics material having a hydrophilic surface and a glass transition temperature between ambient temperature and normal eye temperature. The plastics material may be poly 4-methyl-pentene-1 or a copolymer of 4-methylpentene-1 with 2-methylbutene-1, and may be rendered hydrophilic by coating with silica or titanium dioxide or by compounding with an alkyl titanate, by treating with a strong oxidizing agent, e.g. chromic acid solution, or a sulphanating agent and base, or by copolymerizing with an olefinically unsaturated hydrophilic monomer, e.g. alkenols, glycol acrylates and methacrylates and N-vinyl pyrrolidone. The physical properties of the polymer may be varied by incorporating other monomers, e.g. acenaphthylene.
Patent GB-206395-A (GB)
Title: Lifting jack
IPC: B66F1/06
Filed: 1922-12-15
Abstract: 206,395. Ragazzini, S. Dec. 15, 1922. Jacks.-The lifting pillar a of a jack is provided with racks c, d one of which is engaged by the nose f<1> of a pivoted actuating handle f and the other of which is engaged by a pawl e mounted eccentrically in a rotatable disc g. An arm i, Fig. 4, attached to the disc is normally held in position between studs l by a spring m, but can be released by a member o connected to the handle f when it is desired to release the pawl e for lowering. The tubular pillar a is closed by a plug u and contains a perforated piston s mounted on a rod q fixed to the base. The space between the piston and plug is filled with a viscous fluid.
Patent GB-769434-A (GB)
Title: Improved method for casting single-flight stairs and stairs produced thereby
IPC: E04F11/022
Filed: 1953-12-09
Abstract: 769,434. Casting concrete stairs. FORSSELL, K. I. Dec. 9, 1953 [Dec. 30, 1952], No. 34311/53. Class 87(2). [Also in Group X] In a method of casting single-flight stair units each string-piece 1 is cast separately and surface ground after solidifying and a pair of precast stringpieces are placed upside down in a mould at a stair-width distance apart and united by casting the steps in reinforced concrete layers 4, 6 separated by sound-insulating material 5 ; slabs 2, 3 having been placed in such positions that they form the bottom of the mould and form treads and risers the surfaces of which are previously ground. The slabs 2, 3 may be of artificial stone or of natural stone, e.g. marble and the stringpieces 1 are preferably of artificial stone with an appearance matching that of the slabs 2, 3. The filling material 5 may be clinkers. The reinforcement 9, 10 is supported by projections from reinforcement embedded in the stringpieces. Finally the whole casting is vibrated and its surface polished. Fig. 2 shows an assembly of two prefabricated stair units 12, 13 extending between beams 18, 19 on which they rest, each at one end, their other ends meeting and being formed as tread halves 2a, 2b with recesses 14, 15 which together form a groove in which a supporting beam 17 fits (see Group X).
Patent GB-1080754-A (GB)
Title: Improvements in or relating to building components
IPC: B28B23/00
Filed: 1964-08-21
Abstract: 1,080,754. Laminates. E. METZGER. Aug. 21, 1964 [May 11, 1964], No. 34376/64. Heading B5N. [Also in Division E1] A flat, curved or corrugated building board comprises a layer of expanded clay particles 11 bound together by hydraulic cement 12 which also acts as an adhesive to secure on one or both sides a facing 13 comprising a sheet of glass fibre impregnated with cement.
Patent GB-876065-A (GB)
Title: Improvements in or relating to pivot hung windows and similar structures
IPC: E06B3/34
Filed: 1956-11-09
Abstract: 876,065. Windows. AUSTIN, F. B. Nov. 11, 1957 [Nov. 9, 1956], No. 34416/56. Class 20(3) In a pivoted window the sash frame 6 is of the same depth face to face, as the outer frame 17 and a weather strip 8 is provided on each face of the window about the periphery of the sash frame, each weather strip being in two portions 9, 10, 12, 13, one of which covers half the periphery of the sash frame and is secured thereto, the other covering the other half of the periphery and being secured to the outer frame, the two portions 9, 10 on preferably the inside face of the window being hinged together at 11 thus pivotally mounting the sash within the frame. The outer weather strip portions 12, secured to the outer frame, and 13 secured to the sash have reduced parts 14 interengaging so as not to interfere with the opening of the window. As shown, the outer frame 17 is of a size to fit a standard subframe. Where a number of such sashes are hung side by side or above each other the intervening mullions or transomes may be dispensed with.
Patent GB-1040798-A (GB)
Title: Process and apparatus for milling
Inventor: HODGSON JOHN
IPC: B02C17/16
Filed: 1964-08-22
Abstract: 1, 040, 798. Wet grinding; continuous mixing appliances. BRITISH TITAN PRODUCTS CO. Ltd. Aug. 2, 1965 [Aug. 22,1964], No. 3444/64. Headings B1C and B2A. Apparatus for milling a particulate solid in a liquid comprises a closed vessel 1 having inlet and outlet orifices 7, 8 and a shaft 6 carrying a rotatable impeller 10, the angle between the plane of the impeller and the longitudinal axis of the shaft 6 being an angle other than a right angle. The angle is preferably in the range 70 degrees to 89¢ degrees. The impeller is provided with holes 13 which are preferably at 45 degrees to the faces of the impeller. The impeller and vessel may be made from, or coated with, polyurethane rubber, polyethylene or polypropylene. The inlet orifice may, alternatively, be in the periphery of the vessel. The surface of the impeller and the interior of the vessel may be serrated. The distance between the surface of the impeller and the interior wall of the vessel may be in the range 0. 25 to 6 inches. The impeller may have a flat central portion the plane of which is at right angles to the longitudinal axis of the impeller shaft and an outer portion the plane of which forms an angle other than a right angle with the longitudinal axis of the impeller shaft. There may be more than one impeller. The apparatus may comprise a plurality of mills the outlet of one being connected to the inlet of another by means of a conduit and means are provided for introducing into the conduit a diluting liquid or a chemical e.g. a dispersing or flocculating agent and means are provided for cooling the conduit. The particular solid may be milled in the presence of a particulate grinding medium e.g. zircon or silica sand, which has a particle size in the range 25 to 3000 microns. The peripheral speed of the impeller is preferably in the range 10 to 120 ft/sec. The particles are introduced into the vessel in the form of a slurry preferably at a concentration in the range 250 to 2000 grams/litre. The dispersing agent may be present in the slurry in a concentration in the range 0.05% to 2.5%. The amount of particulate milling medium introduced into the vessel may be 0. 5 to 3 times that of the volume of the slurry of liquid and particulate solid to be milled. The particulate solid to be milled may consist of titanium dioxide particles which have been leached. The average retention time of the particulate solid to be ground is preferably in the range 10 to 50 seconds.
Patent GB-1399785-A (GB)
Title: Electric cables
IPC: H01B13/26
Filed: 1973-07-19
Abstract: 1399785 Seaming non-metallic sheet material INTERNATIONAL STANDARD ELECTRIC CORP 19 July 1973 [26 July 1972] 34453/73 Heading B5K [Also in Division H1] In the manufacture of a telecommunication cable of the kind in which a multi-conductor core K is surrounded by a longitudinally applied overlapping screen and/or moisture barrier in the form of a metal tape 5 coated on at least one side with a substance which will bond to itself, upon heating, at the overlap and to an adjacent thermoplastic sheath, the overlapping edges of the coated tape S are welded by, immediately before the closing of the overlap of the tape S, subjecting those surfaces near the edges which subsequently lie one above the other to linear or band-shaped heating by infra-red radiation. After heating, the tape edges are firmly pressed together. The tape S is formed longitudinally around the core K by slide bars or rollers so that the outer tape edge extends perpendicular to the inner edge lying on the core K. Two infra-red radiators having infra-red sources J1, J2 and reflectors R1, R2 are arranged at right-angles to each other so that the paths of their rays impinge as a point or short line B1, B2 on the surfaces to be heated to produce linear or bandshaped heating as the tape S moves past. If parallel rays, Fig. 2, are produced by the reflectors R1, R2, converging lenses L1, L2 are provided to focus the rays. The infra-red radiators and the lenses may be axially adjustable. The sources J1, J2 are point sources and the reflectors R1 R2 are concave mirrors but, in a modification, linear infra-red sources are provided with cylindrical reflectors and, in Fig. 2, cylindrical convex lenses. To prevent overheating, the radiated power may be made variable by inserting between the power supply and each infra-red radiator a regulating transformer synchronized with the manufacturing drive via a servomotor.
Patent GB-1473524-A (GB)
Title: Fluid containers especially but not exclusively to containers  of the fluid dispenser type
IPC: B65D83/00
Filed: 1974-08-06
Abstract: 1473524 Fluid dispensers; hydraulic accumulators PLANT INDUSTRIES Inc 6 Aug 1974 34483/74 Headings F1D and F1R In a fluid dispenser 2 or a pressure accumulator (not shown), the fluid is stored and expelled under pressure by means of two resilient bladders 82, 86, the inner bladder 82 being formed from a material which is impermeable to the fluid, and the outer bladder 86 being formed from a material which has sufficient elasticity to expel substantially all the fluid from the inner bladder. The bladders nestle one within the other both when empty and when filled, and a friction-reducing material may be provided between the bladders. The inner bladder is preferably a butyl-type elastomer and the outer bladder a latex-type elastomer. In the dispenser 2 shown in Fig. 1 a mandrel 62 having fluidconducting channels 70 is provided to initially stress the bladders. The mandrel may be cruciform or oval in cross-section.
Patent GB-647278-A (GB)
Title: Improvements in or relating to the production of sintered steel
IPC: C22C33/02
Filed: 1947-12-29
Abstract: In a method of producing sintered steel by pressing bodies of iron powder, the pressed body is gas carburized at 800 DEG -1000 DEG C., the partial pressure of the carburizing gas being variably controlled to adjust the carbon content of the steel, and then sintered at 1050 DEG -1300 DEG C.  Iron powder may be pressed at 3 to 4 tons per sq. in., gas carburized by heating to 800 DEG -1000 DEG C. in an atmosphere obtained by the partial combustion of propane or illuminating gas or producer gas, and finally sintered at a higher temperature.  The article may be subjected to a second pressing, which may be a hot pressing, at 6-10 tons per sq. in. after carburizing and before sintering.  Alloyed iron powders may also be treated.  The Specification as open to inspection under Sect. 91 comprises also the use of hydrogen to which propane or CO has been added. This subject-matter does not appear in the Specification as accepted.
Patent GB-1022552-A (GB)
Title: Preparation of tetrafluoroethylene
IPC: C07C17/20
Filed: 1962-09-11
Abstract: Tetrafluoroethylene is obtained by reacting a mixture of CH4 recycled CH3Br and CH2Br2 and bromine at 300-700 DEG  C. in a pyrolysis furnace, dissolving HBr from the products by contact with an azeotropic solution of HBr in water, at 20-60 DEG  C. under pressure, separating the resulting CBr4, CHBr3, CH2Br2 and CH3Br, recycling the CH2Br2 and CH3Br, reacting the CHBr3 with HF at 150-500 DEG  C. in the presence of a fluorination catalyst, separating the resulting HBr and CHBrF2 by distillation, pyrolysing the CHBrF2 at 500-1000 DEG C., separating the resulting C2F4 and HBr by contact with an azeotropic solution of HBr in water, at 20-60 DEG  C. under pressure, recycling unconnected CHBrF2, oxidizing HBr and CBr4 formed above with molecular oxygen, at 300-600 DEG  C., and separating and recycling the resulting bromine.  Detailed processes are described for each step.
Patent GB-521867-A (GB)
Title: Improvements in or relating to the mixing concrete
IPC: B28C5/36
Filed: 1938-11-29
Abstract: 521,867. Concrete mixers. NATIONAL STONE & GRANITE PAVING CO., Ltd., and BUTLER, O. E. S. Nov. 29, 1938; No. 34683. Drawings to Specification. [Class 86] A concrete mixer comprises an endless belt conveyer to which the dry ingredients are supplied and mixed by fixed blades or rotary mixers, water being then supplied after which the materials are again mixed. -The blades extend diagonally from opposite sides alternately of the belt which is furnished with upwardlydirected side extensions forming a trough.
Patent GB-823731-A (GB)
Title: Improvements in or relating to masonry drills
IPC: E21B10/44
Filed: 1956-11-13
Abstract: 823,731. Drills; making drills. MASON, R. E., HEIR, A. H., and ALDRIDGE, H. Nov. 13, 1957 [Nov. 13, 1956], No. 34685/56. Classes 83 (2) and 83 (3). A masonry drill comprises a tip 2 of tungsten carbide secured, as by brazing, to a shank 1, of round section, having at least one helical rib 3 integral therewith. The shank, of hardenable nickel-molybdenum-chromium alloy-steel and preferably having three or four ribs, may be extruded and then twisted to give the ribs a helical form. The stock is then cut into drill lengths, machined and hardened. The depth of the ribs is between 0.02-0.06 ins., and the tip preferably projects slightly further, radially, than the ribs.