baber/WOPTO huggingface dataset:
Patent GB-717998-A (GB)
Title: Process for the manufacture of potassium sulphate
IPC: C01D5/10
Filed: 1952-08-14
Abstract: Potassium sulphate is manufactured by reacting practically stoichiometric quantities of potassium chloride and calcium sulphate at about normal temperature (25 DEG  C.) in a concentrated aqueous ammoniacal medium, the concentration of ammonia in which is higher than the concentration corresponding to saturation at normal temperature and pressure, whereby the reaction is effected in a single step without intermediate or side formation of a double salt. The concentration of ammonia may be 50 per cent. or more and ammonia may be added during the reaction to maintain or increase the pressure.  Industrial potassium chloride containing up to 11 per cent. sodium chloride may be used and the calcium sulphate may be gypsum, semi-hydrate, or anhydrite.  The reactants are agitated in aqueous ammonia in an autoclave for one hour under an absolute pressure of 3 kg./sq. cm. which falls to 2.5 after reaction.  The potassium sulphate is filtered off, is washed with 50 per cent. ammonia, is freed from ammonia by reducing the pressure and/or by heating, and is dried.  The mother liquor and wash liquors may be treated to recover ammonia, which is redissolved, by reducing the pressure and/or by heating. Alternatively, the mother liquor may be freed from calcium chloride by cooling to -5 DEG  C., while maintaining the ammonia saturation, when a solid hydrated ammonate of calcium chloride is formed which is filtered off, and the residual concentrated ammonia solution after adjustment may be reused in the process. Ammonia may be recovered from the ammonate by heating with or without vacuum, e.g. at 100-150 DEG C. in vacuo, to yield 70 per cent. calcium chloride.  Where the residual solution is re-used sodium chloride may be removed from time to time by distillation of a fraction.
Patent GB-1304594-A (GB)
IPC: G02F1/33
Filed: 1970-04-29
Abstract: 1304594 Acousto-optic devices WESTERN ELECTRIC CO Inc 29 April 1970 [5 May 1969] 20560/70 Heading H4F An acousto-optic diffraction device, e.g. a light deflector or intensity modulator, comprise an insoluble crystalline body with a composition corresponding to (Tl 2 O) x .B or (PbO) y B or mixtures thereof, where B is Re 2 O 7  (x=y=1); or M<SP>VI</SP>O 3  (M<SP>VI</SP> is W, Mo, S, Se, or Te, x=1, y=1 or 2); or M<SP>V</SP> 2 O 5  (M<SP>V</SP> is P, As, Sb, V, Nb, Ta, x=1, 2 or 3, y=1-8); or M<SP>IV</SP>O 2  (M<SP>IV</SP> is Si, Ge or S, x=1-3, y=1-8); or M<SP>III</SP> 2 O 3  (M<SP>III</SP> is B or Bi, x= 1-3, y=1-8). Apart from the material used, the embodiments are identical to those described in Specification 38217/69 and constructional details of a light deflector are also described and illustrated. Preferred materials are PbMoO 4 , PbWO 4  and mixtures thereof, and Pb 2 MoO 5 , Pb 2 WO 5  and mixtures thereof. At least the first two of these materials may be used in devices wherein the magnitude of the acousto-optic interaction is required to be independent of the optical polarization state, by passing the optical and elastic waves along the a and c axes respectively.
Patent GB-1137148-A (GB)
Title: Improvements in refrigerator
IPC: F25D17/06
Filed: 1966-05-10
Abstract: 1,137,148. Refrigerators. GENERAL ELECTRIC CO. 10 May, 1966 [12 May, 1965], No. 20586/66. Heading F4H.  A refrigerator comprises a one-piece liner 1 and a horizontal partition 2 dividing the refrigerator into an upper freezer compartment 3 and a lower storage compartment 4. The partition comprises a sheet member 10 having flanges secured to liner 1, a recessed body 16 of foamed plastics material, an evaporator 7 in said recess, a removable cover 21 of foamed plastics material supported on the body 16, a removable sheet member 22 overlying the cover 21, and a fan 32 having its supporting frame 33 moulded in the body 16. The evaporator chamber is in communication with the storage compartment through passages 56 in body 16 and with the freezer through the space between the front portions 41 and 20 of cover 21 and body 16 respectively, said space being provided with louvres 45 formed in a mullion 46. The fan discharges to compartment 4 through a passage 58 in body 16 and an opening 59 in member 10, and to compartment 3 via a tunnel 49 which accommodates an ice-tray 52. A metal pan 26 having an opening 27 is provided beneath the evaporator for discharging defrost water through a passage 28 in body 16 to a channel 29 in member 10 which directs the water over the rear wall of compartment 4. A drain 30 discharges the water to the machinery compartment.
Patent GB-597128-A (GB)
Title: Process for the catalytic manufacture of aldehyde derivatives
IPC: C07D323/04
Filed: 1945-08-10
Abstract: Aldehyde polymers and acetals are prepared respectively by polymerizing acetaldehyde or one of its homologues and by reacting acetaldehyde or one of its homologues with an alcohol, using as a catalyst a neutral ammonium salt, for example, the chloride, sulphate or oxalate.  Thus, acetaldehyde may be polymerized to paraldehyde and metaldehyde or converted into acetals of methanol, ethanol and other alcohols.  Preferably, 0.2 to 0.5 grams of the salt are used per gram-mole. of acetaldehyde.  In examples, ammonium chloride is used as the catalyst in the preparation of diethyl acetal and of paraldehyde.  The Specification as open to inspection under Sect. 91 relates also to the use of salts of amines as catalysts in the above reactions and includes an example of the preparation of diethyl acetal using ethylamine hydrochloride as catalyst.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1008721-A (GB)
Title: Improvements in or relating to polishing
Inventor: RAFFE JOSEPH PETER
IPC: A47L23/05
Filed: 1962-05-20
Abstract: 1,008,721. Cleaning pads; shoe cleaning apparatus; brush and pad combinations. CHISWICK PRODUCTS Ltd. April 22, 1963 [May 30, 1962], No. 20721/62. Headings A4F and A4K. A polyurethane foam pad 13 impregnated with wax shoe polish is mounted on a holder 14 provided with a cover 15 the rim of which may be engaged in a groove 14b in the holder 14 when the pad is not in use, and in a groove 14c when the pad is used for applying polish, the cover 15 then serving as a handle. In a modified construction the holder 14 is provided on one side with a pad 13 and on the other with a bristle brush 17, and two covers 15 are provided. The brush 17 may be replaced by a cloth duster.
Patent GB-614358-A (GB)
Title: Improvements in or relating to the production of hollow articles by dipping
IPC: B29C41/14
Filed: 1946-07-11
Abstract: 614,358. Conveyer chains. LATEX INDUSTRIES, Ltd., and LANDAU, L. July 11, 1946, No. 20793. [Class 24] [Also in Group V] A biplanar chain conveyer for supporting formers 11 on which articles are moulded by dipping (see Group V), comprises links each consisting of parts 10A, 10B, 10C, the central part 10B being free to pivot in one plane with respect to the part 10A and in a plane at right angles with respect to the part 10C. The parts are connected together by pins 17, 19 and the links are connected to each other by swivel pins 16 which engage in corresponding bearings 18. Each former is rotatably mounted on the underside of a link by means of a rod 20 and a flexible sleeve 21.
Patent GB-965176-A (GB)
Title: Preparation of diene polymers
IPC: C08F36/04
Filed: 1962-05-30
Abstract: A conjugated diene is polymerized in the presence of a salt of the adduct of a drying oil, a semi-drying oil or a long oil alkyd resin and an alpha-beta ethylenically unsaturated dicarboxylic acid or an alpha-beta-ethylenically unsaturated dicarboxylic acid anhydride. Specified dienes are butadiene, isoprene, chloroprene, 2-3-di-methyl butadiene and myrcene and their mixtures with styrene, alpha-chloro-styrene, vinyl acetate, methyl methacrylate, acrylic acid, acrylonitrile and N-butoxy-methyl acrylamide. The unsaturated acid may be maleic acid or anhydride and the drying oil linseed oil while the adduct may be neutralised, e.g. with 2-methyl -2- amino-1-3-propanediol. U.S.A.  Specification 2,941,968 is referred to.
Patent GB-1358255-A (GB)
Title: Production of non-woven material for tobacco smoke filters
IPC: A24D3/02
Filed: 1971-05-13
Abstract: 1358255 Tobacco-smoke filters CELANESE CORP 13 May 1971 [13 May 1970] 20829/72 Divided out of 1355519 Heading A2C [Also in Division D1] Tobacco smoke filters are made from a web produced by extruding molten polypropylene, polyethylene, polyesters or polyamide having a melt index of 5 to 60 and an intrinsic viscosity of 0.4 to 1.25 through an orifice, attenuating the polymer stream by means of a gas stream to produce a continuous filament, collecting said filament upon a cylinder 19 or an endless belt to form a random autogeneously bonded web and forming grooves in the web by rollers 24. Rolls 24 are maintained at a temperature of 25‹C to 225‹C and produce longitudinal, sinusoidal or zig-zag grooves. The web may be withdrawn from cylinder 19 by rigidly, hinged or spring mounted calendering rolls 23 which apply a pressure of up to 2000 Ibs./linear inch to compress but not glaze the web. The web may be dusted with activated carbon, silica gel, granular polyurethane, cellulose acetate flake, wood pulp, flock or liquid additives. The web is converted into tobacco smoke filter rods at 28.
Patent GB-621144-A (GB)
Title: Improvements in or relating to a perfecting offset press
IPC: B41F7/06
Filed: 1946-07-12
Abstract: 621,144. Rotary offset printing-machines. HARRIS-SEYBOLD CO. July 12, 1946, Nos. 20895 and 20896. Convention dates, July 13, 1945. [Class 100 (ii)] A perfecting offset press has two printing units arranged side-by-side, each comprising plate, offset and impression cylinders 23, 22, 21 and corresponding cylinders 27, 26, 25 rotating in the opposite direction, inking mechanisms 30, 31 situated above the plate cylinders, sheet conveying devices, such as transfer cylinders 50, 51, conveying sheets partly around each impression cylinder, the sheets travelling in a path lying between the plate cylinders, partly above one and partly below the other, the layout of the machine being such that the offset cylinders in each unit are disposed on opposite sides of the press and outward of the impression cylinders, and that the offset cylinders are outermost in each unit, whereby easy access is obtained to the plate and offset cylinders for operators standing on the outside of each unit. Sheets are fed from a pile 11 over a table 40, 41, and associated travelling belts 44, 45 to transfer - cylinders 17, 18, and from cylinder 18 the sheets are taken by the impression cylinder 21, which carries them past the first offset cylinder 22. The sheets then travel to impression cylinder 25 of the other unit and are printed on the other side by offset cylinder 26 and are finally taken by a stripper cylinder 34 delivering the sheets to a travelling band 54 travelling below an operator's table 39 to a delivery stack 38. The two units are synchronized, and the layout of the machine and the hinging of the tables 40, 41 gives access simultaneously to large areas of both plate and offset cylinders. In modifications, Fig. 1 (not shown), the machine has two additional cylinders transferring the sheets from one impression cylinder to the other; in Fig. 3 (not shown), the sheets are fed from below the impression cylinders and delivered upwardly between the two units, the plate cylinders are vertically above the offset cylinders, the impression cylinders being disposed centrally and below the offset cylinders, and the feed cylinder is below the impression cylinders but towards the outer side of the machine, and in Fig. 4 (not shown) feed is from below and the impression cylinders are of double size with'two sets of grippers each holding one sheet.
Patent GB-1366753-A (GB)
Title: Lock-operated valves
IPC: B60R25/042
Filed: 1972-05-05
Abstract: 1366753 Locks EMCA REG TRUST 5 May 1972 [19 May 1971] 20930/72 Heading E2A [Also in Divisions Fl and F2] A valve in a vehicle fuel pipe is operated by a barrel lock 7. The moveable closure member 20 is operated through a diaphragm seal 15 through a thrust member from a member 9 which is threaded into the casing to move axially on rotation by the lock cylinder. The valve seating 14 is replaced through closure 21. In a modification, (Fig. 3, not shown), the valve comprises a spring-loaded ball which is pushed off its seating by the lock-operated thrust member.
Patent GB-1519125-A (GB)
Title: Methods of manufacturing amorphous alloy
IPC: C25D3/56
Filed: 1977-05-18
Abstract: 1519125 Amorphous alloys by electro-plating SONY CORP 18 May 1977 [20 May 1976 5 Feb 1977] 20931/77 Headings C7A and C7B Amorphous alloys containing predominantly Fe and P with or without Ni, Co, Cr and/or Cu are made by electro-deposition from an aqueous acid bath based on Fe<SP>2+</SP> and hypophosphite. Conditions for ensuring amorphous conditions relative to bath properties and electric conditions are given. Buffers, brighteners and stabilizers e.g. L-ascorbic acid may be included in the bath. The deposited film may be removed from the substrate e.g. by dissolving the latter. The alloy may contain (in wt. per cent) Fe 84-90; P 10-16; Ni and/or Co up to 14; Cr 1À4-2À8; Cu of the order of 1À5.
Patent GB-275988-A (GB)
Title: Improvements in gas compressors of refrigerating apparatus
IPC: F25B31/00
Filed: 1927-08-09
Abstract: 275,988. Jones, J. W. Aug. 9, 1927. [A Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 13, 1927]. Stuffing-boxes, substitutes for.-A flexible tubular corrugated wall 17 is secured to the lower end of the cylinder 1 of a refrigerator gas pump, and at its lower end to the piston rod. The corrugated vessel contains sealing oil. Any gas leaking into it past the piston 4 is returned through a bye-pass 32 having a check valve 34 and opening into the compressor inlet. The piston is actuated by an eccentric 10 turning in a sliding block in the block 6, which slides in a guide 7 and is lubricated from a chamber 11. The pump inlet and outlet are connected with low and high pressure coils through ports 30, 28 controlled by needle valves. During the preliminary exhaustion of air from the system, to fill it with gas, the port 30 is closed and a valve 35 in the bye-pass 32 is closed or partly closed to prevent oil from being drawn into the cylinder. The pump is driven through a combination fly-wheel and fan.
Patent GB-1078352-A (GB)
Title: An improved cleansing system for discharging clenasing liquid under pressure
Inventor: HARE GEORGE FRANK
Filed: 1964-05-21
Abstract: 1,078,352. Cleaning apparatus. G. F. HARE. May 19, 1965 [May 21, 1964], No. 21003/64. Heading A4F. [Also in Division F1] Apparatus for cleaning poultry houses with hot water containing a detergent or germicide, comprises an electric motordriven pump and reservoir assembly mounted on wheels, the pump 9 delivering to a discharge lance (16), Fig. 2 (not shown), having a control valve (17). A pressure-relief valve (21) and recirculatory pipework are provided to return the delivery to the pump inlet when the lance control valve is closed. An electric immersion heater 10 is mounted in a chamber 11 in the reservoir. A two-way valve (12) is provided for connecting a water supply to the reservoir, and for connecting the reservoir to the pump. A filter (22) and a pressure gauge (23) are provided.
Patent GB-463917-A (GB)
Title: Improvements in continuously variable friction wheel change-speed gears
IPC: F16H15/04
Filed: 1936-07-29
Abstract: 463,917. Variable - speed friction gearing. BERGER, F. G. M. July 29, 1936, Nos. 21007 and 21008. Convention dates, Aug. 16, 1935 and June 30, 1936. [Class 80 (ii)] A continuously - variable friction gear comprises a wheel composed of friction shoes arranged on levers which nest together to produce a variable aperture in the manner of the iris diaphragm of a camera. In the form shown in Figs 1 and 3, the driving shaft 1 is connected by an Oldham coupling 3 to a shaft 6 carrying a grooved roller 9, which engages inside the contracting gearwheel, the casing 15 of which is fast on the driven shaft 19. The bearing 7 of the shaft 6 slides in guides 8 and is urged by a spring towards the position of maximum eccentricity. The contracting gear - wheel comprises a number of parallel sets of levers 10, four in each plane, each set being angularly displaced with respect to the adjoining set, so that for all apertures there is an almost continuous ring of friction shoes 35, although as the roller 9 rotates contact will occur in different planes. Each member of a set of levers 10 is pivoted at one end 11 to a ring 12 and at'the other end has a slot 11<a> engaging a pin 13 on a ring 14. The rings 12 are toothed to engage a common pinion 16, and the rings 14 to engage a pinion 17. To adjust the diameter of the wheel the sets of rings 12, 14 are rotated in opposite directions by the pinions 16, 17. This is effected by sliding axially a control sleeve 21 formed on the inside with a flat thread 23 engaging the hub 20 of the contracting gearwheel and with a further thread 24 on the outside engaging a sleeve 26, which is thus rotated relatively to the hub 20 and casing 15 of the wheel. Teeth 27 on the sleeve 26 drive gear trains 28 ... 32 on the casing 15 to rotate the pinions 16, 17. Shoes 35 carry at the side rollers 33, Figs. 1, 1a, held in position by wires 34 and seating on curved surfaces 33a so as to produce a grip between the levers 10 and the sides of the grooves on the roller 9. The levers 10 are offset for half their lengths to economize space. In a modified form, the rings 12, 14 carry projections connected to the casing or to each other by springs, so as to tend to urge the parts towards the position of smallest diameter. Movement of the rings is synchronized by connecting each set by a pin to one of a pair of intermeshing segments pivoted on the casing 15.
Patent GB-460279-A (GB)
Title: Improvements in and connected with road coverings
IPC: E01C7/12
Filed: 1935-07-24
Abstract: 460,279. Roads. HALBACH, K. July 24, 1935, No. 21079. Convention date, Sept. 18, 1934. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 25, 1936.] [Class 107] A method of making mortar-bound roads consists in applying thereto, before the mortar has set, a temporary covering of a substance capable of taking up water but having little or no perviousness to mortar, and in effecting the compression of the road through the intermediary of this covering. The covering, which may for instance be of comminuted slag or foam-lava, absorbs excess water in the mortar and also ensures an even compression of the road during the rolling operation. The road may be constructed by first applying a layer of mortar to the foundation, spreading broken stones or pebbles over the mortar, and then rolling. A further quantity of mortar is then added and worked in by elutriation. The temporary covering layer of lava sand is then applied and the surface rolled. The Specification as open to inspection under Sect. 91 describes also a road construction having a concrete foundation, an upper layer of macadam, and an intermediate cushioning layer of lava-sand, foam-lava or the like. The macadam layer may be covered by a temporary layer of foam-lava or the like, for the reasons stated above. This subject-matter does not appear in the Specification as accepted.
Patent GB-1317843-A (GB)
Title: Flameproofing of polyurethane foams or polyurethane coatings
IPC: C08K5/5353
Filed: 1971-04-19
Abstract: 1317843 Polyurethane coating CIBA-GEIGY AG 19 April 1971 [11 Feb 1970 8 Jan 1971] 21104/71 Heading B2E [Also in Divisions C2 and C3] Substrates, particularly those of a fibrous nature, may be coated with a polyurethane containing as flame-proofing agent a phosphorus compound having the formula: wherein A represents -COOH, -CONH 2 , or -CONHCH 2 OR''', R 1 , R 2 , R 3  and R 4  each represent C 1-18  alkyl, C 1-4  halogenoalkyl, cycloalkyl or aryl, R', R" and X each represent hydrogen or methyl, R"' represents hydrogen or C 1-4  alkyl and n and p are 1 or 2. In particular Examples, woven cotton cloth is coated with various compositions by knife-coating and "release" techniques.
Patent GB-1473828-A (GB)
Title: Seven-segment display arrangement and liquid fuel dispensing pump embodying the same
IPC: F04B49/10
Filed: 1973-05-03
Abstract: 1473828 Lamp failure alarms DRESSER EUROPE SA 3 May 1974 [3 May 1973] 21139/73 Heading G4N In a seven-segment display device of the type having a common anode 2 and a cathode 3 for each segment with a cathode driver 4 connected to each cathode, or vice versa, a respective circuit connection 6 including a series diode 7 is connected to each cathode (or anode) and a detector 8 is connected to each connection so as to draw current through the respective diode from the respective cathode driver (or anode driver) in the event of a segment failure, the output from the detector being arranged to give a warning indication. This indication may be given by a visible and/or audible warning device 10 and/or by causing all the cathodes to be energized. In the arrangement described with reference to Fig. 2 (not shown), thirteen display devices are provided respective cathodes being connected in common to the cathode drivers and to the circuit connections 6. This arrangement is activated in a time-division multiplex manner. The display device arrangement may be provided on the dispensing nozzle of a fuel pump as described with reference to Figs. 3 and 4 (not shown).
Patent GB-1294539-A (GB)
Title: Improved straining device
Inventor: SYRJANEN AHTI
IPC: B01D29/11
Filed: 1970-05-02
Abstract: 1294539 Pulp strainer J OSAKEYHTIO 2 May 1970 21192/70 Heading BID A paper pulp strainer, comprising at least one pair of concentric screens 3, 4 located in a housing with an accepts outlet connected to the space between the screens and an inlet to the spaces outside the outer screen and inside the inner screen, has conventional rotary blades 6, 7 moving adjacent to the upstream faces of the screens to clean them by producing successive pressure and vacuum pulses, and each blade 6 adjacent the outer screen is mounted radially overlapping relationship with corresponding blade 7 adjacent the inner screen so that the comparatively weak vacuum pulse produced by blade 7 on account of its lower linear speed is reinforced by the pressure pulse produced by blade 6 and propagated across the intervening space. The screens may be cylindrical or frusto-conical, and blades may be straight and vertical or extend along conical spirals or helices to match the screens.