baber/WOPTO huggingface dataset:
Patent GB-461589-A (GB)
Title: Improvements in or relating to the production of hydrogen peroxide
IPC: C01B15/023
Filed: 1936-02-05
Abstract: Amino-substituted aromatic hydrazo compounds are obtained by the reduction of the corresponding azo compounds, for example by means sodium amalgam and water; or zinc and aqueous sodium hydroxide, preferably in a solvent such as benzene or toluene. The reduction can be effected in an inert atmosphere, e.g. of hydrogen or nitrogen. The solution of the hydrazo compound is separated from the aqueous phase after reduction, and is freed from sodium hydroxide by washing with water as an acid aqueous medium or by filtration through a solid acid salt, preferably while maintaining an oxygen free atmosphere by means of carbon dioxide or hydrogen.  Examples describe the reduction of 4 - amino - 3 - methyl - benzene - azo - 2<1> - methyl - benzene, 4 - dimethyl - amino - 1 - azobenzene, 2 - amino - 3,5 - dimethyl - benzene - azo - 2<1>, 4<1> - dimethyl - benzene, 4 - dimethyl - aminobenzene - 1 - azo - 1 - naphthalene, 4 - amino - benzene - 1 - azobenzene, and 4 - amino - 3 - methoxy - benzene - azo - 2<1> - methoxy benzene by sodium amalgam in the presence of water.ALSO:Hydrogen peroxide is obtained by the controlled oxidation of an amino-substituted aromatic hydrazo compound to the corresponding azo compound in the presence of an aqueous medium. The hydrazo compound is prepared by the reduction of the corresponding azo compound, for example by means of sodium amalgam and water, or zinc and aqueous sodium hydroxide, preferably in a solvent such as benzene or toluene.  The reduction can be conducted in an inert atmosphere, e.g. of nitrogen or hydrogen. The solution of the hydrazo compound is separated from the aqueous phase after reduction, and is freed from sodium hydroxide by washing with water or an acid aqueous medium or by filtration through a solid acid salt, preferably while maintaining an oxygen free atmosphere by means of carbon dioxide or hydrogen.  The oxidation is effected in the presence of water, for example by means of oxygen or air.  The water may be rendered more acid by the addition of sulphuric or phosphoric acids.  Preferably the pH of the reaction medium should not exceed about 8.  The oxidation may be conducted at 20--25 DEG  C.  The resulting aqueous hydrogen peroxide solution may be freed from colouring matter by filtration through an absorbent such as charcoal.  The resulting azo compound is reduced for re-use in the process.  The examples describe the reduction and subsequent oxidation in the presence of water of 4-amino-3-methyl-benzene-azo-2<1>-methyl benzene, 4-dimethylamino-1-azobenzene, 2-amino-3, 5 dimethyl-benzene-azo-2<1>, 4<1> dimethyl-benzene, 4-dimethylamino-benzene-1-azo-1-naphthalene, 4-amino-benzene-1-azobenzene and 4-amino-3-methoxy-benzene-azo-2<1>-methoxy benzene.
Patent GB-101580-A (GB)
Title: Improved Apparatus for Grinding and Sharpening Cutting Edges of Arcuate Outline.
Inventor: MORGAN JOHN HENRY
IPC: B24B3/48
Filed: 1916-03-10
Abstract: 101,580. Morgan, J. H. March 10, 1916. Cutting-edges, treating. - Apparatus for grinding and sharpening cutting-edges of arcuate outline, such as that of a safety-razor blade x, comprises a blade-holder c or a body carrying a blade-holder arranged to swing in an arc of a circle transversely of the plane of a grindstone a having a convex face, the holder or its support being resiliently mounted upon its pivot b<1>. A pad of absorbent material w may be used to apply moisture to the edge of the wheel. The apparatus may be arranged for grinding concave blades.
Patent GB-871085-A (GB)
Title: A process for the production of n-trialkyl borazanes
IPC: C07F5/00
Filed: 1958-02-04
Abstract: N-trialkyl borazanes are produced by reacting trialkylamine compounds of boron halides (i.e. N-trialkyl B-trihalogenoborazanes), including compounds of trialkylamines which contain cycloalkyl radicals attached to the nitrogen, at room temperature or elevated temperature with alkali metal or alkaline earth metal hydrides, borohydrides or complexes of the metal hydrides with boric acid esters.  A solvent may be used, such as a hydrocarbon or ether or the N-trialkyl borazane which is being produced.  A ball mill is a suitable reaction vessel.  A trialkylamine-boron trichloride compound may be used with a wide range of hydrides.  The trialkylamine-boron trifluoride compounds react readily with lithium hydride or alkaline earth metal hydrides but with sodium or potassium hydrides or borohydrides a sodium or potassium borofluoride is formed in addition to the borazane and trialkylamine, which borofluoride is decomposed, by heating, into boron fluoride and sodium fluoride and the resulting boron fluoride is reacted with the trialkylamine to form the trialkylamine-boron fluoride compound which can be used again.  A trialkylamine-boron fluoride compound reacts with a borohydride of an alkali metal or alkaline earth metal in the presence of an excess of trialkylamine to give a borazane and a metal fluoride and some of the borazone is reacted with an alkali or alkaline earth metal hydride to form the borohydride and trialkylamine which can be used again.  In one method of operation, the trialkylamine-boron fluoride compound is mixed with a trialkyl borazane as a solvent and calcium hydride is added in finely powdered form, preferably in suspension in an inert solvent.  This process may be operated continuously.  Specification 855,881 is referred to.
Patent GB-413402-A (GB)
Title: Improvements in or relating to modulated carrier wave receivers
IPC: H03D1/16
Filed: 1933-02-08
Abstract: 413,402. Valve circuits for wireless reception. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Feb. 8, 1933, No. 3903. Convention date, Feb. 8, 1932. Addition to 393,415. [Class 40 (v).] A detector, arranged to give constant rectified signal despite changes in radio-frequency input, comprises a grid-leak rectifying valve having a plate-current grid-voltage characteristic of approximately logarithmic form convex towards the zero plate current line. The curve I of Fig. 2<a> shows the logarithmic curve, grid voltage E being measured horizontally, and plate current J vertically. The theoretical curve rises asymptotically to the ordinate V but in practice the characteristic curve bends off as shown at II. On the assumption that a grid-leak rectifier biasses itself to an extent equal to the amplitude of the incoming carrier, the Specification shows mathematically that the rectified signal is independent of the strength of the incoming carrier, but is dependent solely on its depth of modulation. Volume control on the occurrence of fading is thus automatic. The actual valve characteristic may with advantage lie in the position III below the theoretical curve I, as this counterbalances the tendency for the grid to assume positive voltage during positive peaks of input. The valve should be a screen-grid or pentode valve of high internal resistance compared with its external resistance, and with an amplification factor greater than 20. The inner grid mesh may differ in different sections, as described in the parent Specification.
Patent GB-522181-A (GB)
Title: Windmills
IPC: F03D11/02
Filed: 1939-02-06
Abstract: 522,181. Wind-motors. DEHN, F. B. (Stover Manufacturing & Engine Co.). Feb. 6, 1939, No. 3906. [Class 110 (iii)] A wind wheel shaft 19 drives a pump rod 65 through gearing 27, 76, pitmans 78 and a forked crosshead 80. The crosshead carries a roller 98, which runs between the guide columns 89, 90 and also a scraper 99 which is arranged to remove some oil from the guide 90 on each upstroke, to lubricate the crosshead bearings. Oil is deposited on guide 90 by a loose-fitting sleeve 100 dipping into trough 106 which is filled by discs 104 secured to the immersed gear wheels 76, riding over the wipers 105. When the mill is pulled out of the wind by means of chain 52, the vane 32 operates the rod 43 which applies a brake of the expanding hub type to the hub 34 of the wind wheel 12.
Patent GB-162815-A (GB)
Title: Improvements in bottle washing and brushing machines
IPC: B08B9/36
Filed: 1920-02-09
Abstract: 162,815. Dyson, A. Feb. 9, 1920. Bottles, cleaning.-Machines in which the bottle while revolved by a friction roller is brushed internally and externally are given, (1) improved adjusting-means for the external brush and friction-roller and, (2) a spring-clutch for holding the internal brush. The external brush b and friction-roller i are mounted on pivoted arms n held in brackets o<1> on the base of the machine, rigid adjustment of the brush being effected by a screw g and nut p, while an additional spring r renders the roller adjustment resilient. The internal brush a is held in a clutch with spring jaws d<1> having grooves g to receive the brush stem, in order to allow of easy withdrawal and slipping should the brush jam.
Patent GB-1085002-A (GB)
Title: Improvements in and relating to the preparation of organotin compounds
IPC: C07F7/22
Filed: 1966-01-28
Abstract: Organotin compounds are prepared by reacting SnX4 (X = Cl, Br or I) with R3Al (R = alkyl) in the ratio 0.76 to 1.0 moles of SnX4 per mole of R3Al in the presence of at least 1.0 mole per mole of R3Al of an alkali or alkaline earth metal (including magnesium) halide to form a mixture comprising an organotin compound and an aluminium trihalide-alkali or alkaline earth metal halide complex; drowning the mixture with water to form an aqueous phase containing the halide complex and a nonaqueous phase containing the organotin compound and separating the two phases.  The organotin compounds typically have the formula RaSnX4- a, where a is 1 to 4 but preferably 3 or 4.  X is preferably chlorine and the metal halide preferably sodium chloride. The alkali or alkaline earth metal halide may be present in the amount of 1 to 4 moles per mole of R3Al. R preferably contains less than 9 carbon atoms and more preferably is butyl or octyl.  The reaction may be carried out in the presence of a liquid inert solvent which may have a boiling point of 30 DEG  to 100 DEG  C. so that the reaction temperature may be maintained at a value within this range by refluxing the solvent.  The reaction product is preferably drowned with at least 300 parts by weight of water per mole of R3Al to form the aqueous phase.  Any solids remaining after the drowning may be filtered off or redissolved by addition of dilute aqueous hydrohalic acid.  The organic phase may be separated, washed with dilute acid and water and dried, e.g. with sodium sulphate. Solvent if any may be stripped off in vacuo to yield the organotin product.
Patent GB-1345639-A (GB)
Title: Conversion aids
IPC: G06G1/08
Filed: 1972-01-28
Abstract: 1345639 Conversions between unit systems D U ROBINSON 28 Jan 1972 [28 Jan 19711 4027/72 Heading G4B A device for making conversions between different systems of units comprises a base 14, bearing a circular logarithmic scale, and a disc 15, pivotal with respect to the base and bearing at least three indicators 16, the angular spacing of the indicators being such that they intersect values on the scale 14 corresponding to one and the same quantity expressed in different systems of units. Instead of the units of currency shown, the indicators may correspond to units of weight, area, length, volume, speed or pressure, Fig. 2 (not shown).
Patent GB-655075-A (GB)
Title: Improvements in plate elements particularly for plate type heat exchangers and filter presses
IPC: F28F3/08
Filed: 1948-02-12
Abstract: 655,075. Plate heat-exchangers. CHERRY-BURRELL CORPORATION. Feb. 12, 1948, No. 4126. Convention date, Feb. 24, 1947. [Class 64(iii)] [Also in Group I] Relates to plate apparatus such as heat exchangers, filter presses and the like of the kind comprising juxtaposed plates 42 spaced apart by gaskets which also define the flow spaces between adjacent plates. According to the invention, each plate, which is generally rectangular in shape, has four triangular ports 95, a gasket-receiving groove 96 extending around the four ports and four additional gasket - receiving grooves positioned inwardly of the ports whereby a closed gasket 99 laid around two diagonally opposite ports and parallel to the base line of the two other ports, defines a substantially rhomboidal flow space between adjacent plates. In the form shown, two spaced grooves 97, 98 are provided extending parallel to each other and to the base line of each port and within the rhomboidal flow space defined by the gasket 99, these grooves act as flow disturbing means adjacent to the ports within the flow space. Specification 655,076 is referred to. According to the Specification as open to inspection under Sect. 91, a double flow path between adjacent plates may be provided by the insertion of an additional gasket 101 (see Fig. 12, Cancelled), extending centrally in a modified form of plate. This subject-matter does not appear in the Specification as accepted.
Patent GB-1439710-A (GB)
Title: Portable gas injector
IPC: F04B33/00
Filed: 1974-01-29
Abstract: 1439710 Gas storage containers NIPPON PISTON RING CO Ltd 29 Jan 1974 [3 Feb 1973] 04213/74 Heading F4P A portable gas injector includes a casing 1 housing a gas container holding gas under pressure. An injection head 4 has screw engagement with the casing and at its outer end has injection mouth 20 and at its inner end a needle 12 which punches a hole in seal 6 when the head and the casing are screwed together. The injection head includes a primary gas expansion chamber 7 with which bore 23 of the needle communicates, a secondary expansion chamber 8 communicating with the primary chamber and a valve arrangement 10 controlling flow of gas from the secondary chamber to the injection mouth. The primary chamber includes a surface so arranged opposite the bore 23 of the needle that gas issuing from the needle impinges on the surface and is reduced in velocity so that the gas expands into the primary chamber before passing to the secondary chamber. This secondary chamber 8 is defined by a casing 15 having a cup-shaped portion which projects into the primary chamber 7 to define the impingement surface at the base of the cup.
Patent GB-448647-A (GB)
Title: Improvements in magnetometers
IPC: G01R33/038
Filed: 1935-02-09
Abstract: 448,647. Magnetometers. WATTS & SON, Ltd., E. R., and TOWNS. V. W. H., 123, Camberwell Road, London. Feb. 9, 1935, No. 4253. [Class 37] A balance system for a magnetometer has its central body part b and the magnet blades a formect as a casting in cobalt steel. Temperature compensating rods d, e are provided with adjustable weights f, g, these rods being of aluminium and the material known under the Registered Trade Mark " Invar," the weights f, g being of brass and steel.
Patent GB-345309-A (GB)
Title: Improvements in or relating to automatic clutch-operating mechanism
IPC: F16D23/12
Filed: 1929-12-11
Abstract: 345,309. Operating motor-vehicle clutches. JANDER, H., 51, Emdenerstrasse, Berlin. Dec. 11, 1929, No. 4321/31. Convention date, Dec. 11, 1928. Divided on 343,642. Drawings to Specification. [Class 80 (ii).] The engine-suction device for operating motorvehicle clutches is identical with that described in the parent Specification, but the claims relate to the rotary-type servomoter employed.
Patent GB-1246941-A (GB)
Title: A method and apparatus for manufacturing plastics cushioning material
Inventor: SATO WASUKE
IPC: B32B27/00
Filed: 1970-01-29
Abstract: 1,246,941. Laminated embossed thermoplastic materials. SHOWA DENKO K.K. 29 Jan., 1970 [1 Feb., 1969; 25 Feb., 1969; 22 Jan., 1970 (2)]. No. 4325/70. Heading B5N. [Also in Division A4] Cushioning material is produced by feeding a first film of thermoplastic material to the surface of a moulding drum having a plurality of moulding recesses formed on its surface, a gas exhausting means communicating with the recess and a cooling means disposed at the bottoms of the recesses, heating the first film to a temperature above its softening point, embossing it by means of the pressure of compressed gas applied to the outside surface of the first film on the moulding drum, feeding a second film of thermoplastic material to the surface of the moulding drum so as to be superposed on the first embossed film, heating the second film to a temperature above its softening point, integrally bonding both films together while at a temperature above their softening points so that the second film closes the opening of embossments formed on the first film to hermetically seal the embossments of the first film, cooling the integrally bonded film assembly while it is supported on the moulding drum and removing it from the moulding drum. In Fig. 1, moulding rotating drum 1 is detachably fitted with an engaging ring 2, e.g. of metal, on the outer surface of which are spatially arranged recesses 4 for embossing film 18, there being vertically perforated at the bottom of each recess a narrow exhausting bore 5 which communicates with an air exhausting duct which extends all around the outer surface of the drum, so that air present in the moulding recess escapes when the film is pressed into the recess. A cooling water passage is formed on the outer surface of the drum. Pressure chamber 6 is provided with compressed air pipe B containing heater A, heating means 7 and reflecting boards 8 and 8a. Film 18 is pressed against the outer periphery of drum 1 by rollers 9 and 10 which contact seal board 11. Embossed film 18 leaving compression chamber 6 is contacted with film 19 with pressure by roller 13, both films plasticized in laminating chamber 15 by heating means 14, pressed to form cushioning material by means of water coolable roller 16 and the cushioning material cooled by blowing air on to it between rollers 16 and 17 and taken up as product 20 by means of discharge roller 17. In an alternative arrangement film 19 is contacted with embossed film 18 at the outlet of chamber 6 at which are arranged juxtaposed guide rollers 10. In other alternative arrangements the compression chamber 6 may be divided into two zones, in the first zone of which the first film is heated under pressure insufficient to deform it and in the second zone of which it is heated under pressure sufficient to cause embossment.
Patent GB-968790-A (GB)
Title: Constant speed feed rollers drive
IPC: B21D43/08
Filed: 1963-02-04
Abstract: 968,790. Feeding webs. D. F. CUNNINGHAM. Feb. 4, 1963 [March 26, 1962], No. 4420/63. Heading B6B. Shafts 84 carrying the feed rollers of a partition assembling machine are driven by an electric motor 12 through shafts 82 and universal joints 80. The shafts 82 are driven through bevel gears 70, 72 by a common shaft 66 driven through gears 42, 46 and 52. The speed of the motor 12 is adjustable by a rheostat 86, Fig. 4, adjustable by a handle 90 in a circuit including a switch 88.
Patent GB-764377-A (GB)
Title: Improvements in or relating to the manufacture of crimped or cockled cellulose textile fabrics
IPC: D06Q1/02
Filed: 1955-02-15
Abstract: Patterned cockles or undulations are produced in cellulose textile fabrics by subjecting the fabric to the local action of a chemical shrinking agent and then to mechanical deformation in a pattern before the shrinking process is complete.  The shrinking agent generally used is an alkali metal hydroxide such as sodium hydroxide, and may be employed as a paste made by thickening a 30 DEG -100 DEG Tw. solution with starch; this paste is applied by printing or stencilling or, if the fabric has previously been treated in the appropriate pattern with a resist, for instance gums, waxes or starches, it is sprayed or impregnated with a solution of the shrinking agent.  After this treatment, the fabric is subjected to the deforming force, such as crimping or creasing, before the shrinking has proceeded to any considerable extent, i.e. preferably within 30 seconds of treatment.  The shrinking agent is allowed to remain in contact with the fabric for a further sufficient length of time, usually 5 to 10 minutes, for shrinkage of 5-25 per cent, preferably 10-18 per cent, to occur, after which the shrinking agent is removed by washing and the fabric is dried.  The shrinking agent or the resist, if used, may contain dyes or dye dischargers.  In preferred embodiments, the fabric is treated with shrinking agent in stripes extending warp-wise, and the deformation is applied in striped patterns in the transverse direction.  The mechanical pattern disappears in the shrunk parts of the fabric, which is left with a uniform plisse finish.  The fabrics to be treated may be of natural or regenerated cellulose, or of natural cellulose coated with regenerated cellulose.
Patent GB-926190-A (GB)
Title: Improvements in electric plugs
IPC: H01R13/56
Filed: 1960-02-09
Abstract: 926,190. Two-part couplings. LIGHT & POWER ACCESSORIES CO. Ltd., and J. EDWARDS. Feb. 8, 1961 [Feb. 9, 1960], No. 4512/60. Class 38 (1). A fluid-tight fused electric plug constructed of thermoplastic or thermosetting materials consists of a base 5A, in a circular recess 5 of which is fitted a sub-assembly 1, comprising a disc-like plastic moulding carrying two current pins 4B, an earth pin 2D, a pilot pin 3 and one or two cartridge fuses 4, the recess being closed by a hard-rubber cover 6, clamped to the base 5A by a screw 6D. Integral with the cover is a tapering spout-like extension 6A to receive and protect a cable. In its preferred form the extension 6A has a soft rubber lining (not shown) to provide a fluid-tight seal between the cable and the extension 6A, and to provide a flexible cable support. The cover 6 has an inwardly projecting lip 7 which engages a groove 7A in the base 5A to provide a fluid-tight seal, alternatively the base 5A may have a pop-bead for engagement with a groove in the cover 6. The current pins 4B are sheathed by sleeve 5E which may be integral with the base 5A and the base may be provided with opposite protuberances 5B over which the sub-assembly 1 may be sprung so that it is positioned in the grooves 5C formed by the protuberances. The base 5A may be provided with a neoprene 0-ring 7B which engages a recess in the wall of a socket (not shown) into which the plug fits, to provide a fluid-tight seal.
Patent GB-986503-A (GB)
Title: Stable, storable crystalline potassium sorbate and process for its manufacture
IPC: C07C51/43
Filed: 1963-02-04
Abstract: Stable, storable, crystalline potassium sorbate is obtained by atomizing a potassium sorbate solution with a pH higher than the equivalence point of potassium sorbate and drying the atomized solution so that the water content is less than 0.2% by weight. The drying may be by incorporating a heated gas, such as air, with the solution at a temperature not above 155 DEG  C. and a pressure below the atmosphere.
Patent GB-362245-A (GB)
Title: Improvements relating to flushing cisterns
IPC: E03D5/092
Filed: 1931-02-13
Abstract: 362,245. Water - waste preventers. SHANKS & CO., Ltd. and SHANKS, G. M., Tubal Works, Barrhead, Renfrewshire. Feb. 13, 1931, No. 4573. [Class 26.] The actuating lever of a flushing cistern comprises internal and external members 2, 3, and a pin 4 preferably passing through a bush 5; the member 3 has projections 7 adapted to engage stops 8.
Patent GB-563263-A (GB)
Title: Improvements in or relating to delivery mechanism for printing machines
IPC: B65H29/16
Filed: 1943-03-22
Abstract: 563,263. Delivery apparatus. DAWSON, PAYNE, & ELLIOTT, Ltd., and PAYNE, R. March 22, 1943, No. 4597. [Class 100 (i)] A sheet delivery mechanism for printing-machines of the kind in which the sheets are deposited on spaced platforms formed of tapes or strings 1 carried by chains 2, the sheets being removed on to a pile by stripping devices which hold the sheets while the platforms slide under the sheets which finally drop on to a pile board, is constructed to give a better view of the printed sheets by supporting the tapes 1 on holders 5 carried bv tubes 4 attached to supports on the chains. The sheets are stripped by adjustable devices 6 on arms 8 which are mounted so that the strippers 6 can be moved aside for removal of the pile. The sheets are prevented from lifting by tapes 10 passing over bowls 7 and driven by a bowl 9 on the shaft of one of the chain sprockets.