baber/WOPTO huggingface dataset:
Patent GB-626939-A (GB)
Title: Improvements in telegraphic transmitters
IPC: H04L25/02
Filed: 1946-02-14
Abstract: 626,939. Photo-electric telegraph transmitters. PELLE, P. Feb. 14, 1946, No. 4728. Convention date, Feb. 16, 1945. [Class 40 (iii)] In a telegraph transmitter a stable oscillator O illuminates a glow discharge lamp L in brief flashes once per cycle, the flashes falling on a photo-cell C, the current pulses from which operate a two position telegraph relay B. The relay armature connects line L<1> to one of two current sources, normally of the same value but of opposite polarity, supplying " mark " or " space " currents to the line according to the armature position, which changes over at each photo-cell pulse. A synchronous motor M driven by the oscillator output is geared down to drive a perforated disc D, the holes U being positioned to pass or interrupt the photo-cell illumination so as to pulse the line relay and supply a combination of " mark " or " space " currents to the line in accordance with a character of a predetermined code. The disc may have several concentric rows of holes, one of which is selected by a shutter or by radial displacement of the lamp and photo-cell. Mathematical expressions are given for determining the size of the perforations. Specification 526,826 is referred to.
Patent GB-713879-A (GB)
Title: Improvements in and relating to electron discharge devices
IPC: H01J17/06
Filed: 1952-02-22
Abstract: 713,879. Discharge apparatus. CHARLOTTE, H. F. Feb. 22, 1952 [Feb. 23, 1951], No. 4758/52. Class 39(1) A cathode suitable for a flash tube comprises a perforated cylinder 12 surrounded by a cylinder 14, with a wire spiral 13 between them. Cylinder 12 may be of activated tantalum, and 14 of nickel, the tantalum spiral 13 touching both cylinders. The outer cylinder has cooling fins at its lower end, and is rounded at its upper end so as to retain the spiral spring, prevent corona discharges, and assist in restricting the space discharge, further restricted by a disc 16. The filling may be a mixture of krypton, argon, and neon.
Patent GB-153219-A (GB)
Title: Process for the selective isolation of alkaloids
Filed: 1919-08-16
Abstract: Alkaloids are selectively isolated from drugs containing more than one constituent, by taking advantage of their varying basicities and their different solubilities in various solvents. The raw alkaloidal material containing more than one constituent, mixed if necessary with powdered vegetable tissue, is acidified and treated with a suitable solvent, whereby the weakly basic alkaloids are extracted, leaving the strongly basic alkaloids fixed in the tissue.  Further vegetable tissue is then added to the concentrated extract, and the weakly basic alkaloids fixed thereto by the addition of acid.  Both vegetable residues are then separately treated according to the methods described in the parent Specification and Specification 134,197.  By a choice of solvent, one alkaloid can be extracted from all the remainder. The isolation of morphine from opium and the separation of the remaining alkaloids into weakly and strongly basic components are described in the example.  Alkaloids of the narcotine group comprise the weakly basic components.
Patent GB-514885-A (GB)
Title: Improvements in and relating to electric current rectifying systems
IPC: H02M7/06
Filed: 1938-02-16
Abstract: 514,885. Rectifying alternating current. BRITISH THOMSON-HOUSTON CO., Ltd. Feb 16, 1938. No. 4861. Void. Convention date, Feb. 18, 1937. [Class 38 (ii)] A full-wave rectifier 13 is fed from a centretapped auto-transformer 6 which is in turn fed from a transformer 3 the secondary of which has tappings 5 whereby the voltage applied to the D.C. load 18, which'may be a traction motor, is regulated.
Patent GB-659196-A (GB)
Title: Improvements in snap fasteners for use with necklets, bracelets and like articles ofjewellery
IPC: A44C5/20
Filed: 1949-02-23
Abstract: 659,196. Catches. BRADLEY, S. G. Feb. 23, 1949, No. 4889. [Class 44] In a jewellery clasp of the kind comprising an ornamental body and a safety tongue sliding into and engaging the body with a snap action, the base 1 of the body carries integral upstanding lugs 6 having shoulders 8 providing-a sealing for the flat underside of a mount 2, the parts 1, 2 being secured together by extensions 9 of the lugs which pass through side grooves 10 and are clinched into lateral grooves 11 in the upper surface of the mount.
Patent GB-897146-A (GB)
Title: Thermionic valve grid electrodes
Inventor: HARRIS JAMES ELDRED
IPC: H01J19/00
Filed: 1960-02-11
Abstract: The grid of a thermonic valve, e.g. of tungsten or molybdenum, is coated with manganese and nickel by electro-deposition and the coating then formed into an alloy by heating preferably at 850 DEG C. in a hydrogen atmosphere.  The manganese content of the alloy with nickel may be 5% to 25% by weight.
Patent GB-285446-A (GB)
Title: An improved stop valve
IPC: F16K5/20
Filed: 1928-02-16
Abstract: 285,446. Schaffer & Budenberg Ges., (Assignees of Fischbach, R.). Feb. 16, 1927, [Convention date]. Wedging or jamming.-Relates to a stop valve having a rotatable full-way passage body 19, Figs. 1 and 2, which aligns with the inlet and outlet passages in the open position, and carries at right-angles to the passage axis closure discs or cones 17 which, after rotation of the passage body 19 to the aligned closing position, are forced by levers 11 against seatings on the inlet and outlet passages. The levers 11 are pivoted at 26 on the passage body 19 and engage at their lower ends auxiliary closure discs 14 which first close and then force the main closure discs 12 on to their seatings. With large valves pivoted supporting struts 12 resting on the body 19 are provided; with small valves these and the auxiliary discs 14 are dispensed with. The upper ends of the levers 11 have pins 25 operated upon by the lower end of a flattened guiding member 4<a> on the spindle 4. The guiding member pases through a guide plate 10, having an aperture in the form of a circle with side slots at diametral positions, these slots being engaged by upper side extensions on the guide member 4<a>, which prevent the rotation of the passage body when near the closing position. In the opening movement the rotation of the nut member 5 first lifts the spindle 4 and guide member 4<a>, thus causing the levers 11 to release the closure discs from the seatings, and ,also releasing the guide member from the guide plate 10 as in Fig. 1; when the end 28 of the spindle strikes the nut 5 the spindle and nut are coupled together, as by a clutch, and further rotation thereof rotates the whole valve structure until the body passage aligns with the inlet and outlet passages. This action is brought about by a clutch plate 32, which is raised into engagement at 35 with the nut member, and rolLers 8 thereon moved into inclined slots 33. In the reverse closing movement, therefore, the slots 33 ensure that 'the valve structure shall be first rotated to the closing position with the side projections on the guide member 4<a> in register with the side slots in the guide plate 10 ; further rotation is then arrested by vertical slots 34, the clutch plate 32 being released from the nut 5 so that the guide member 4<a> is moved downwards to effect the final pressing of the closure discs on to their seatings. To facilitate assembly the body 19 is divided into two parts on a central plane at rightangles to the axis of the passage, as shown in Fig. 2.
Patent GB-1451952-A (GB)
Title: Furnaces
IPC: H05B3/14
Filed: 1973-01-31
Abstract: 1451952 Heating resistors UNITED KING- DOM ATOMIC ENERGY AUTHORITY 25 Jan 1974 [31 Jan 1973] 4960/73 Heading H5H Electrical connectors 2, 3 between the N.T.C. refractory metal oxide furnace heating resistor 1 and terminal members 7 and 8 which are at room temperature are made of lanthanum strontium chromite. The connectors are preferably made by subjecting the oxide and a binder to isostatic pressure. The oxide may be made by mixing specified proportions of decomposable compounds of lanthanum strontium and chromium and calcining. The compounds may for example be in the form of solutions of salts, such as nitrates, of lanthanum, strontium and chromium. The resistor 1 comprises a tube of zirconia-yttria or zirconiacalcia, and it is initially rendered conducting by a withdrawable preheater 9 which comprises a nickel-chrome platinum or silicon carbide heating coil in an alumina tube 10. The terminal members 7, 8 are of water cooled copper. A spring (not shown) or gravity urges connectors 2, 3, resistor 1 and terminal member 7, 8 together. A zirconia heat shield 6 mounted in fire brick surround 4 encloses resistor 1.
Patent GB-1429615-A (GB)
Title: Surface grinding apparatus
IPC: B24B7/02
Filed: 1974-02-04
Abstract: 1429615 Grinding TOYODA-KOKI KK 4 Feb 1974 [23 March 1973] 04990/74 Heading B3D Apparatus for grinding a flat surface on a workpiece W comprises a bed 1 for holding the workpiece and having horizontal hydrostatic slide surfaces 1a, 1b a tool head 3 mounted on the slide surfaces for translatory movement in a horizontal circular path, means for moving the tool head in the path, a ram 25 vertically slidable in the tool head and rotatably supporting a shaft 32 provided with a cup-shaped grinding wheel 34 at its lower end, means 42 for angularly adjusting the shaft relative to the workpiece surface in a vertical plane, means 36 for rotating the shaft, and means for vertically moving the ram to effect infeed of the grinding wheel. A transfer device 2 is provided on the bed 1 for positioning the workpiece. The hydrostatic slide surfaces 1a, 1b co-operate with pockets 3a, 3b in the tool head for permitting horizontal movement thereof. Each surface 1a, 1b rotatably supports shafts 21, 22 eccentrically mounted on circular plates 19, 20 on drive shafts 17, 18. Each drive shaft is connected by worm gearing in blocks 7, 8 and by chains 15, 16 to a shaft 5 rotated in bearings 4 in the tool head by a motor 6 whereby the tool head is moved in a horizontal circular path. A head 23 is mounted on the tool head 3 and slidably receives a pair of vertical guide rods 24 secured to a support plate 35 for the ram 25. A rack on the ram is engaged by a pinion 28 driven by a wheel 27 and worm 26 from a motor to effect vertical movement of the ram. The ram 25 has an adjusting sleeve 29 which is held against rotation relative to the ram and is supported at its lower end by a spherical bearing 30 and at its upper end by a sleeve 39 having a spherical surface engaged by four members 40 adjustable by screws 42 in a sleeve 38 in the ram. The sleeve 29 rotatably supports the shaft 31 of the cupshaped grinding wheel 34 which is rotated by a motor 36 connected by a flexible coupling 37 to the shaft 31. Adjustment of the members 40 by the screws 42 laterally adjusts the sleeve 39 and thus the inclination of the wheel shaft 31 so as to be perpendicular to the surface of the workpiece which is ground by the orbital movement of the wheel as the ram is lowered by the motor driving worm 26.
Patent GB-1027676-A (GB)
Title: Improvements in or relating to refrigerating machines
IPC: F25D23/00
Filed: 1963-02-07
Abstract: 1,027,676. Refrigerating. DANFOSS A/S. Feb. 7, 1963 [Feb. 8, 1962], No. 5039/63. Heading F4H. The compressor of a refrigeration system is force-cooled by means responsive to the temperature of the compressor. As shown in Fig. 1, the compressor 5 is cooled by a fan 6 which is operated by a thermally-responsive switch 7 mounted on the compressor casing. In the embodiment of Fig. 2 the fan 14 is mounted on the compressor casing 13, the thermallyresponsive switch being incorporated in the fan motor housing (Fig. 3, not shown), and the condenser 11 of the system is disposed in contact with the outer walls of the refrigerator cabinet 9 which has a lid 10. Forced flow water cooling may be employed instead of a fan and the thermally-responsive switch may be operated by a member which also controls a switch for cutting out the compressor when its temperature exceeds a predetermined value.
Patent GB-575467-A (GB)
Title: Improvements in and relating to cutlery
IPC: B26B9/00
Filed: 1944-03-20
Abstract: 575,467. Making cutlery blades. MILLER, B. M. March 20, 1944, No. 5156. [Class 83 (ii)] [Also in Groups VI and XIV] A knife blade is made from a blade blank by the following steps : heating the blank and pressing it between dies to provide a hollow c in the blade alongside the edge e which is to form the cutting edge ; grinding the face d of the blade to form the cutting edge, but excluding the hollow c ; lightly grinding the hollow c ; mirror polishing the part of the face d at the back of the hollow c and finally buffing or fine glazing the hollow. The blade may be formed with a hollow on both sides or on one side only, a narrow portion h being left between the hollow and the cutting edge. The form of blade produced is stated to be suitable for butchers' knives or surgical knives.
Patent GB-875841-A (GB)
Title: 2-thioparabanic acids, and their preparation
IPC: C07D401/10
Filed: 1959-02-13
Abstract: The invention comprises compounds of the general formula: <FORM:0875841/IV (b)/1> (wherein R represents an alkoxy group having 4 or 5 carbon atoms, or an N,N-dialkylaminoalkoxy group, Py represents a pyridyl group, and n is 0, 1 or 2) and their physiologically tolerated acid addition salts, and pharmaceutical preparations containing them (see Group VI).  The compounds may be prepared by reacting a diphenylthiourea of the general formula <FORM:0875841/IV (b)/2> or an acid addition salt thereof, with oxalic acid or (preferably) a reactive functional derivative thereof, and, if desired, converting a resulting acid addition salt into the free base or a resulting base into a physiologically tolerated acid addition salt thereof.  Diphenylthioureas of the second general formula above are prepared by reacting an R-substituted phenyl isothiocyanate with a Py(CH = CH)n-substituted aniline.ALSO:Pharmaceutical preparations, useful as tuberculostatic or leprostatic agents, comprise, in admixture with a pharmaceutical carrier suitable for enteral or parenteral administration, a 1,3-diphenyl-2-thioparabanic acid of the general formula <FORM:0875841/VI/1> (wherein R represents an alkoxy group having 4 or 5 carbon atoms or an N,N-dialkylaminoalkoxy group, Py represents a pyridyl group, and n is 0, 1 or 2), or a physiologically tolerated acid addition salt (e.g. hydrohalide, sulphate, phosphate, acetate, propionate, glycollate, lactate, oxalate, malonate, succinate, maleate, fumarate, malate, tartrate, citrate, hydroxymaleate, dihydroxymaleate, benzoate, salicylate, p-aminosalicylate, or methane-, ethane-or hydroxyethane-sulphonate) thereof, with or without other therapeutically useful substances, especially other antitubercular agents, such as p-aminosalicylic acid, isonicotinic acid hydrazide, streptomycin or dihydrostreptomycin, or antileprotic agents, such as sulphones (e.g. thiazolsulphone). The preparations may take the form of tablets, dragees, capsules, solutions or emulsions, and may contain preserving, stabilizing, wetting or emulsifying agents, salts for varying the osmotic pressure, or buffers.
Patent GB-1098221-A (GB)
Title: Preparation of alkyladamantanes having an ethyl substituent
Inventor: JANOSKI EDWARD JOHN
IPC: C07C5/27
Filed: 1965-02-05
Abstract: Alkyl adamantanes having 12 to 15 carbon atoms and an ethyl substituent on the nucleus are prepared by contacting a three-ringed perhydroaromatic hydrocarbon having 12 to 15 carbon atoms at 50-200 DEG  C., with a HF-BF3 catalyst and stopping the contact before the adamantane formed has isomerised to polymethyladamantane. Perhydroacenaphthene, 2,3-cyclopentanoindene, hydrindacene or 6,7-cyclopentanoindane yield mainly 1-ethyl adamantane. Perhydrofluorene, 1,2-cyclopentanonaphthalene, 2,3 - cyclopentanonaphthalene, perinaphthene or homotetranaphthene yield mainly 1 - methyl - 3 - ethyl - adamantane.  Perhydro anthracene, indane-1-spiro cyclohexane, or tetraline-2-spiro cyclopentane yield mainly 1,3-dimethyl-5-ethyl adamantane.  Perhydro 1,2,3,4 - dibenzocycloheptatriene, 1 - cyclobutyl - 4 - cyclopentyl benzene, or 2-methyl anthracene yield mainly 1,3,5-trimethyl-7-ethyl adamantane. The ratio of hydrocarbon to HF is 100:1 to 1:100; the ratio of HF to BF3 is 1:100 to 100:1.  The hydrocarbon may be diluted with an alkyl naphthene. The progress of the reaction may be followed by gas chromatography of samples, and the product isolated by fractional distillation.  Perhydroaromatic hydrocarbons having 3 rings and 12-15 carbon atoms for use in the above process may be prepared by catalytic hydrogenation of the corresponding aromatic hydrocarbons. Suitable catalysts are Raney nickel, or any of the following deposited on alumina: platinum, cobalt molybdate, nickel tungstate, or nickel sulphide/tungsten sulphide. Suitable temperatures are 200-275 DEG  C. using Raney nickel, and 300-400 DEG  C. using any of the other catalysts mentioned.  The examples describe the hydrogenation of acenaphthene and phenanthrene using Pt/Al2O3 catalyst.
Patent GB-1409645-A (GB)
Title: Cutting machine for friction material
IPC: B23D59/00
Filed: 1974-02-06
Abstract: 1409645 Circular saws A H LAMBERT 6 Feb 1974 [9 Feb 1973] 05524/74 Heading B5L A cutting machine, e.g. for brake lining material, comprises a stand 10, 11 a driven circular saw blade 17 mounted on the stand, a tubular cutting table 20 having a curved outer surface, an opening 22 in the table 20 within which a portion of the saw blade is received, and an extractor for dust connected in communication with the interior of the cutting table. As described the table 20 has one end supported on the stand 11 and connected via pipes 24, 25 to the extractor, and the other end closed by an apertured plate 23. A pivotable plate 30 is mounted on the plate 23 and has apertures 31 which overlap the apertures 29 in the plate 23 by an adjustable amount to vary the extraction force. The saw blade 17, which engages in a slot 22 in the hollow tube, has a guard 26, and is driven from a motor 13 via a belt and pulley 16. The motor support 12 may be pivoted at 12<SP>1</SP> to enable the sawblade to be swung away from the hollow tube. Alternatively the support is fixed and the tube is in two parts 21a, 21b the part 21b being removable to permit access to the blade. An adjustable workpiece guide 28 has an arcuate edge corresponding to the tube surface.
Patent GB-1027691-A (GB)
Title: Improvements in or relating to the manufacture of reinforced plastic articles
Inventor: MERCER FRANK BRIAN
IPC: B29C51/08
Filed: 1962-02-13
Abstract: 1,027,691. Laminates and laminating. PLASTIC TEXTILE ACCESSORIES Ltd. Feb. 4, 1963 [Feb. 13, 1962], No. 5556/62. Heading B5N. A method of forming reinforced configured articles, i.e. other than flat or simply curved articles, comprises assembling together a sandwich of layers comprising one or more internal layers of a heat-softenable plastic net, in between layers of a coherent fibrous material, laminating layers together in the flat by heat and pressure, and transferring the laminate so formed while still hot or after reheating to an unheated mould of the desired configuration to shape and set the article under pressure. Suitable fibrous materials are textile fabric or glass fibre, and the sandwich assembly may be needled before laminating. After moulding, the multi-ply article may be treated, by spraying or dipping, with a settable adhesive such as liquid polyester or acrylic resin, and cured or allowed to cure into a rigid reinforced impermeable article. The initial laminating may be by passing continuous webs through heated rollers or by pressing discrete lengths in heated plattens. The plastic net may be woven, knitted, welded, loose strips or filaments, or foraminated or expanded sheet. Articles include baths, containers, boats and clothing articles.
Patent GB-943252-A (GB)
Title: Improvements in or relating to heat exchangers
Inventor: RYLANDS JOHN RICHARD
IPC: F23M20/00
Filed: 1959-02-18
Abstract: 943,252. Fluid heating systems. E. GREEN & SON Ltd. Feb. 18, 1960 [Feb. 18, 1959], No. 5612/59. Headings F4A and F4S. Air, feed water or other fluid is heated by heat from waste furnace gases in at least two stages 1, 2 between which the fluid receives further heat in an interstage heater 3. The latter may be heated by steam or other fluid from an external source, or by a burner or it may utilize a circulating liquid itself heated by the waste gases (Figs. 2 and 3, not shown). The -arrangement is such that the gas swept surfaces of the first stage 1 are maintained above the minimum temperature at which moisture condensation and consequent corrosion can occur, and the gas swept surfaces of the second stage 2 and subsequent stages are maintained above the lower limit of a higher temperature range (said to be between 220 and 260 F.) within which corrosion also occurs. The heat exchangers 1 and 2 may be either the plate or tube type.
Patent GB-850463-A (GB)
Title: Improvements relating to the manufacture of sheet glass by vertical drawing
IPC: C03B15/08
Filed: 1957-02-19
Abstract: 850,463. Apparatus for vertically drawing glass sheets. UNION DES VERRERIES MECANIQUES BELGES, and BRICHARD, E. Nov. 5, 1957 [Feb. 19, 1957], No. 5617/57. Class 56. An apparatus for vertically drawing glass in sheet form from a body of molten glass 14 comprises water cooled washing means 18 located on both sides of the drawn sheet 12 to initiate setting of the sheet above the meniscus 21 by radiation of heat from the glass towards the coolers, and gas burners 23 adapted to create by means of gas flames, which are effectively continuous in the direction of the length of the coolers, layers of hot gas 25 which by their buoyancy rise in contiguity with the surfaces of the coolers, the upwardly moving layers of hot air between the coolers and the glass being transparent to radiation from the glass. As shown, sheet 12 is drawn from surface 13 of the body of molten glass aided by a solid refractory drawbar 19 which may be slotted medially of its length. through drawing chamber 9 containing coolers 18, by traction rollers 11 housed in lehr 10 where the sheet is annealed. The burners may be carried on the coolers to cool the burners by effecting a heat exchange between the burners and the respective coolers. The coolers may be water box type or tube type which may be in serpentine or parallel form as shown. The cooler may comprise tubes 27 having burners 23 secured to the lower tubes as shown in Fig. 4. As shown in Figs. 5, 6 and 7, the burners may be, constituted by tubing 28 concentrically arranged about a water tube 27, the space 29 between the tubes forming a gas conduit. The drawing of the sheet may be effected using a drawback, or a debiteuse as in the " Pittsburgh " process, or neither may be employed as in the " Colburn " process.