baber/WOPTO huggingface dataset:
Patent GB-695610-A (GB)
Title: Process of preparing a tetra alkyl or aryl tin
IPC: C07F7/22
Filed: 1951-09-05
Abstract: Tetra alkyl or tetra aryl tin compounds are prepared by reacting an alkyl or aryl halide with tin tetrachloride and magnesium in the presence of an inert hydrocarbon and of an ether in catalytic quantities.  The magnesium may be activated, e.g. by adding thereto iodine or ethyl bromide.  The ether may be employed in an amount of at least 5 to 20 mol. per mol. of alkyl or aryl halide.  Ethyl ether is particularly referred to.  The alkyl or aryl halide, the tin tetrachloride and the magnesium may be reacted in the approximate molar ratio of 4 : 1 : 4.  The reaction temperature may be within the range 65-185 DEG  C., within the range 85-95 DEG  C. being particularly suitable.  Suitable inert hydrocarbon solvents mentioned are toluene, xylene, decane, hexane and octane.  Compounds of the type R3SnX, where R is an alkyl or aryl radical and X is a halogen, are also formed as by-products.  In the example tetra-n-butyl tin and tri-n-butyl tin chloride are prepared together with a small amount of di-n-butyl tin dichloride.
Patent GB-654859-A (GB)
Title: Distributing and measuring apparatus for fluids
IPC: B67D7/30
Filed: 1948-08-10
Abstract: 654,859. Dispensing liquids. S.A.T.A.M. SOC. ANON. POUR TOUS APPAREILLAGES MECANIQUES. Aug. 10, 1948, No. 21054. Convention date, Aug. 12, 1947. [Class 116] Apparatus for measuring and dispensing fluid embodying an indicating device, a predetermining device and a measuring device adapted to drive the predetermining device through the intermediary of the indicating device is provided with a transmission connecting the indicating device to the predetermining device which transmission includes a uni-directional transmission device and a ratchet mechanism, the driving element 34 of the ratchet mechanism being connected to the driven element 33 of the uni-directional transmission device and the driven element 35 of the ratchet mechanism being rigidly connected to the drum of lowest denomination 29<SP>1</SP> of the predetermining device. The predetermining device 29 is set, by means of a handle 37 on its shaft 36, to the quantity of liquid to be delivered, the movement of the shaft 36 advancing cams 28 and so raising levers 27, the ratchet wheel 35, also on the shaft 36, clipping under the pawl 34. Raising the levers 27 opens a valve 18 through linkage 24, 25, 26. Under the action of a pump liquid enters the inlet conduit 1 and flows through pipe 6, 12, and the valve 18 into a chamber 15 and thence through the hollow stem 16 of a valve 2. The pressure on the upper face of a device 4 (which is sensitive to pressure and is subjected to the action of a spring 5 which tends to close it) is then less than the pressure on its lower face and it and the valve 2 open in spite of the spring 5 and liquid flows into the delivery tube. As the liquid flows from the pump it passes through a measuring device (not shown) which drives the indicating, device 23 and, through a worm 32, a worm wheel 33 free on the shaft 36 but carrying the pawl 34. The indicating device rotates a cam 22 which lifts a lever 40 and, through linkage 19, 20, 21 opens a valve 17 through which liquid also flows into the enclosure 15. The drive from the indicating device rotates the shaft 36 through the ratchet and pawl until the notches or the cams 28 are in a straight line (the position where the preset drums 29 indicate zero) and the levers 27 fall, closing the valve 18. The pressure in the pipe 9 and on the upper face of the device 4 increases, and the valve 2 closes. Liquid continues to flow at reduced speed through the pipe 11, the valve 17 and the hollow stem 16 up to the moment when the lever 21 falls into the notch of the cam 22 of the indicating device 23, a moment which corresponds to the end of the delivery. Specifications 649,082 and 649,087 are referred to.
Patent GB-572782-A (GB)
Title: Improvements in or relating to arc welding electrodes
IPC: B23K35/04
Filed: 1943-12-15
Abstract: A solution consisting of 15 per cent of polyvinyl chloride in 85 per cent of xylene or toluene is mixed to paste from with a powdered flux consisting of 45 per cent of titanium oxide, 10 per cent of kaolin, 15 per cent of ferromanganese, 10 per cent of felspar, 10 per cent of magnesite, 5 per cent of anhydrous sodium silicate, and 5 per cent of magnetic oxide of iron and applied to the steel core of an arcwelding electrode by extrusion or dipping.  After drying, the surface is coated with a layer of polyvinyl chloride from a solution containing 15 per cent of polyvinyl chloride and 5 per cent of a plasticizer such as equal parts of dibutyl phthalate and tricresyl phosphate in 80 per cent of benzene or toluene.  The polyvinyl chloride may be replaced by polyvinyl acetate, styrene, polymethyl acrylate or methacrylate. Specifications 513,267, 553,553 and 559,033, [Group XI], are referred to.
Patent GB-864031-A (GB)
Title: Valves for milking machines
IPC: A01J5/04
Filed: 1957-07-03
Abstract: 864,031. Milking machines. SEABOURNE, T. L. July 3, 1957, No. 21085/57. Class 5(1). A valve for connecting into the systems of vacuum-operated milking machines, to enable automatic circulatory washing or flushing to be performed at the conclusion of milking operations, has passages to allow washing liquid introduced into the milk line to pass to the teat cups and return through the air line to the releaser, a restriction in the valve restricting passage of the returning washing liquid to the release and thus promote flooding or partial flooding of the milk and air lines with washing liquid. As shown in Fig. 1 the valve comprises a body part 1 with rotatable plug 2 with connections as follows in one part of the valve, 8 to a source of vacuum, 9 permanently connecting the source of vacuum to the releaser, 11 to the releaser pulsator, 12 to the air line from the teat cups or bail pulsators, 13 a restricted connection to the releaser. In another part of the valve there are connections 17 to the milk line from the teat cups, 18 to the releaser and 24 to a source of washing liquid. During milking the valve plug is disposed as shown in Fig. 5 and 6, milk flowing through connections 17 and 18 to the releaser and vacuum being applied from connection 8 to the air line, the releaser pulsator and the releaser. For a preliminary rinse prior to washing the plug is disposed as shown in Figs. 7 and 8, the connection from the vacuum source to the air line being closed, rinse water being drawn from connection 24 through a spiral groove 23 in the surface of the plug passes through the air line to the teat cups and returns through the milk line and connections 17 and 18 to the releaser. For washing the plug is disposed as shown in Figs. 9 and 10, the passage from connection 24 to the spiral groove 23 being closed, detergent solution passes from connection 24 to the milk line through passages 19 and 20 in the plug and is drawn through the teat cups, air line, passages 12 and restricted passage 13 to the releaser.
Patent GB-699713-A (GB)
Title: Improvements relating to television
IPC: H04N5/20
Filed: 1951-09-06
Abstract: 699,713. Valve non-linear amplifying circuit. EDISON SWAN ELECTRIC CO., Ltd. Sept. 6, 1951 [Sept. 8, 1950], No. 21106/51. Class 40 (vi). In a television system, contrast-distortion due to the brightness/grid voltage curve of the C.R.T. of the receiver is reduced by interposing a differential amplifier V2, V1<SP>1</SP>, one valve V2 being fed directly with the input V while the other is fed from a variable-mu cathode follower V1. The valves V2, V2<SP>1</SP> are coupled over resistor R3 and the output is taken from the anodes of terminals 3, 4. Specification 536,089 is referred to.
Patent GB-718906-A (GB)
Title: Improvements in or relating to plastic material
IPC: C08J9/10
Filed: 1951-09-07
Abstract: Gas expanded organoplastics are prepared by using as a blowing agent, which on heating releases nitrogen and carbon dioxide, an N-N1-dinitroso- N-N1- dicarbalkoxy-1, 2-diamino - alkane.  Specified organoplastics are poly-2-chloro - butadiene - 1, 3, butadiene - styrene, butadiene-acrylonitrile, butadiene-methyl methacrylate, polystyrene, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-dicarboxylic acid terpolymers, polyvinyl chloride, urea-formaldehyde, phenol-formaldehyde, alkyds and isocyanate modified polyester amides.  Plasticizers may also be present.ALSO:N,N1 - dinitro - N,N1 - dicarbalkoxy - 1,2 - diaminoalkanes are used as blowing agents for organoplastics. An example discloses the preparation of N,N1-dinitroso-N,N1-dicarbethoxy-1,2-diaminoethane by reacting an aqueous sulphuric acid solution of N,N1-dicarbethoxy-1,2 - diaminoethane with saturated aqueous sodium nitrite.ALSO:Gas expanded natural rubber is prepared by using as a flowing agent which on heating releases nitrogen and carbon dioxide an N-N1-dinitroso-N-N1-dicarbalkoxy-1,2-diaminoalkane.
Patent GB-460521-A (GB)
Title: Improvements in or relating to seed grain disinfection
Filed: 1935-07-25
Abstract: Hydroxyphenylhydrazines and their sulphonic acid salts, for use as seed disinfectants are prepared from the corresponding phenols by diazotization, treatment with potassium sulphite and reduction of the diazophenyl sulphonic acid salt obtained.  The salts may then be transformed into the hydrazines by decomposition with alcoholic hydrochloric acid.  Wetting-agents for addition to preparations of the hydroxyphenyl hydrazine compounds are soaps, alcohol sulphonates, condensation products of higher carboxylic acids with amino- or hydroxy-carboxylic or sulphonic acids, butyl naphthalene sulphonic acid or its condensation product with formaldehyde, reaction products of alkylene oxides and compounds of high molecular weight containing reactive hydrogen atoms, and condensation products of higher fatty acids and polyvalent amines.ALSO:Seed grain is disinfected by wet or dry treatment with hydroxyphenyl - hydrazines, or derivatives or substitution products thereof.  The active substances may be used in aqueous solution or emulsion, or mixed with a dry filling agent. Emulsifying and wetting agents, other fungicides, stabilizing agents, and dust-binding agents may be added.  Numerous active compounds are specified, typical examples being: 1-hydroxy-3-chlorphenyl-4-hydrazine sulphonic acid sodium salt; the oxalic acid salt or hydrochloride of 1-hydroxyphenyl-4-hydrazine; acetone-p-hydroxyphenylhydrazone; benzoyl - p - hydroxyphenyl hydrazine; thymol-4-hydrazine sulphonic acid sodium salt; and 4 - hydroxydiphenylmethane - 3 - hydrazine sulphonic acid sodium salt. Filling-agents referred to include talc, wood flour, sodium carbonate and bicarbonate, and clay.  Wetting-agents specified are: soap, alcohol sulphonates, condensation products of higher carboxylic acids with amino- or hydroxy-carboxylic or sulphonic acids, butyl naphthalene sulphonic acid or its condensation product with formaldehyde, reaction products of alkylene oxides and compounds of high molecular weight containing reactive hydrogen atoms, and condensation products of higher fatty acids and polyvalent amines. The active substances may be stabilized by addition of sodium hydrosulphite or hydroxylamine hydrochloride.  Dust-preventing agents for addition to dry preparations are paraffin oil, petroleum jelly, glycerine, or concentrated solutions of calcium chloride. Hydroxyphenyl sulphonic acid salts may be prepared from the corresponding phenols by diazotization, treatment with potassium sulphite and reduction of the diazophenyl sulphonic acid salt obtained.  The salts may then be transformed into the hydrazines by decomposition with alcoholic hydrochloric acid.
Patent GB-450055-A (GB)
Title: Improvements in or relating to radial plain bearings having centrifugal lubrication
IPC: F16C33/10
Filed: 1935-07-25
Abstract: 450,055. Bearings. AKTIEBOLAGET SVENSKA KULLAGERFABRIKEN, 17, Artillerigatan, Gothenburg, Sweden. July 25, 1935, No. 21194. Convention date, Nov. 29, 1934. [Class 12 (i)] In a radial plain bearing comprising an inner ring having an inner flange mounted on the shaft and connected by a web with an outer flange working in an outer ring and comprising channels to convey lubricant to the working surfaces, the parts constituting the bearing assembly are so formed as to provide communication between the unloaded zone of the bearing clearance space and the atmosphere. The inner ring 1, Figs. 2 and 2a has an inner flange 2 connected by a web 6 with an outer flange 4 having a spherical surface 5 co-operating with a similar surface on the outer ring 7. Channels 9 through the flange 4 convey lubricant to the surfaces 5 ; by providing for a certain degree of radial play in the bearing, any air which may enter the channels can escape between the cooperating bearing surfaces at the unloaded zone. End thrust is taken by plane surfaces 10 on the flange 4 co-operating with side rings 11, lubricant being conveyed to the thrust surfaces by channels 12 ; at each side of the mouth of a channel 12 the side surface of the flange is chamfered so as to provide wedge pockets. The discs 11 are provided with circumferential chamfers 13 communicating with grooves 14 whereby the mouths of the channels 12 are constantly opened to atmosphere. Oil enters through holes 15 in the side rings from an enclosing oil bath and after centrifugal circulation finally escapes through the grooves 14. In a modification, Figs. 4 and 4a for lubrication by grease, end caps 17 are provided to prevent escape of lubricant. Channels 9 convey lubricant to the radial bearing surfaces, and grooves 18 to the thrust surfaces. Inclined channels 19 convey lubricant to the radial and thrust surfaces, the mouths of channels 18, 19 being chamfered. To facilitate assembly, the outer ring has cut-away portions 22 and these extend inwardly beyond the side edges of the flange, whereby the clearance space is put into communication with the atmosphere.
Patent GB-1035016-A (GB)
Title: Lightning arrester
IPC: H01T1/04
Filed: 1965-05-19
Abstract: 1,035,016. Protective arrangements. GENERAL ELECTRIC CO. May 19, 1965 [June 2, 1964], No. 21289/65. Heading H2H. A lightning arrester comprises a plurality of units 1 each comprising a spark gap unit 2 serially connected with at least one voltagedependent resistor 3, 4, one of which resistors has connected in shunt therewith a unit 5 having a number of switching spark gaps in parallel with one of which is connected an electromagnetic coil. The spark gap in each unit 2 is in the form of a pair of diverging horns enclosed in a chamber formed from a pair of ceramic discs having a window therein by means of which the gap may be pre-ionised by a device shunting the gap, a voltage grading resistor also being connected across the gap. The switching spark gap units 5 are constructed similarly to the units 2, the ceramic discs enclosing the spark gaps having toothed inner edges providing an elongated path for the arc when directed to such edges by an electromagnetic coil which shunts the gap. Preionisers and voltage grading resistors are provided as in the units 2 together with shuntconnected capacitors of differing capacitance to ensure that the voltage distribution across the various spark gaps due to steep-fronted voltage transients is non-uniform.
Patent GB-358592-A (GB)
Title: Improvements in or relating to the manufacture of articles from cork
IPC: B29C48/09
Filed: 1930-07-15
Abstract: 358,592. Moulding cork. HOLT, A., 10, Guildford Lawn, Dover, Kent. July 15, 1930, No. 21349. [Class 87 (ii).] In a method of manufacturing articles from cork, the cork is granulated, mixed with a binding agent, fed into a. mould H by a screw device G which has a frusto-conical entry, baked in the mould without pressure and then ejected therefrom. The cork is mixed in a drum which has openings at the top and bottom and a central rotating shaft carrying paddles. The mixture, dried, if necessary, is then placed in the hopper G<2> which has rotating paddles g<1> to feed the material into the frusto-conical end of the screw device G. The screw forces the material into the mould H which fits on the end of the housing G and has its far end closed by a plug. The mould is supported on a carriage H<1> which slides on rails J and is urged towards the screw by a weight K. When filled, the mould is removed and placed in an oven in a frame N, Fig. 5. The mould is then placed in a bearing block and the shaped mass is ejected by a hydraulic plunger which bears against the end plug. Discs can be made from the rod by cutting it transversely.
Patent GB-1138233-A (GB)
Title: Process for the preparation of uranium dioxide-zirconium dioxide aquasols
IPC: B01J13/00
Filed: 1966-05-13
Abstract: 1,138,233. UO 2 -ZrO 2  aquasol. W. R. GRACE & CO. 13 May, 1966 [19 May, 1965], No. 21392/66. Addition to 1,108,316. Heading C1A. A UO 2 -ZrO 2  aquasol is prepared by heating at 80-120‹ C. until peptization occurs a mixture, having a pH of 0À5 to 4, of (a) an alkaline-precipitated electrolyte-free hydrous oxide which is zirconium dioxide, uranium dioxide or a mixture of the two, and (b) an aqueous solution of one or both of a U<SP>4+</SP> salt and a (ZrO)<SP>2+</SP> salt, and, if necessary to produce the desired pH, an acid, the amounts of said salts being such that the aquasol contains the desired proportion of UO 2  to ZrO 2 . The salts are preferably salts of monobasic acids, and where acids are employed they are preferably monobasic. The hydrous oxide may be prepared by mixing an aqueous solution of a uranous salt, a zirconyl salt or mixture of the two with an excess of water soluble alkaline reagent which is NH 4 OH 3 , a metal hydroxide, hydrazine or an amine having a base constant K 6  greater than 10<SP>-8</SP> at 25‹ C., and separating and washing it. The washed precipitate may be mixed with water to a concentration of up to 150 g. per litre to provide part (a) of the mixture. Peptization may be aided by ultrasonic generators or shear mixtures. Reference has been directed by the Comptroller to Specifications 973,839 and 988,982.
Patent GB-853464-A (GB)
Title: Method of obtaining service (tap) waters
IPC: C02F1/28
Filed: 1958-07-04
Abstract: 853,464. Filters ; purifying water. SEITZWERKE G.m.b.H. July 4, 1958 [July 5, 1957], No. 21457/58. Class 46. Water, particularly surface water containing, e.g., radioactive fission products, chemical warfare substances, bacteria and like organisms and mechanical impurities, is withdrawn by a pump 15, Fig. 1, through a suction strainer 11 and a container 13 charged with e.g. steel wool which acts as a filter and imparts ferrous ions to the water. Air is then drawn in at 16 and the water passes on to a vessel 18 shown in detail in Fig. 2. The water enters at 34, and flows first upwards, and then downwards between two cylindrical containers 32, 33. It then flows upwards through a pipe 35 into container 33 and out at 38. The water level is maintained constant by a float-operated vent valve device 37. In vessel 18 oxygen is absorbed and ferric hydroxide formed with consequent precipitation and flocculation of colloids. The water next passes through a multi-layer filter 21, each layer consisting of organic and/or inorganic fibrous and/or granular substances (e.g. asbestos kieselguhr and cellulose as prepared cardboard). The water next passes through active carbon 23 and an ion exchanger 25 followed by a saltcontent-indicating meter 27 (which may act as an impulse generator to control a shut-off device). Finally the water passes through a container 28, a sterilising filter 29 consisting of layers of fibrous and/or granular substances, and a container 30 where salt is added. The steel wool in container 13 may be partially or wholly copper-plated, or it may be replaced by aluminium splinters initially partly corroded with mercury or its compounds.
Patent GB-827833-A (GB)
Title: Improvements in or relating to automatic electric arc welding
IPC: B23K35/368
Filed: 1956-07-12
Abstract: A flux for the core of a low carbon steel electrode consists of 4-20% deoxidizing agents, e.g. ferromanganese, and 75-96% slag forming material composed of 60-85% titanium oxide 4-20% manganous oxide, 8-25% silica and the remainder being mainly of ferrous oxide, aluminium, lime, magnesia and alkalis.  A specific composition is 12% ferromanganese and 88% slag forming mixture consisting of 66% TiO2, 19% SiO2, 6% MnO and 9% FeO + Al2O3 + CaO + MgO + Na2O + K2O.  The slag forming material is prefused.  The electrode is used in a gas shielded arc welding process (see Group XXII)
Patent GB-276034-A (GB)
Title: Improvements in and relating to high voltage circuit interrupters
IPC: H01H9/44
Filed: 1927-08-16
Abstract: 276,034. British Thomson-Houston Co., Ltd., (Assignees of Hewlett, E. M.). Aug. 16, 1926, [Convention date]. High-potential switches; magnetic blow-outs. -A high-potential air-break switch comprises a movable switch arm 11 pivoted to a support 13 and adapted to engage a fixed contact 15 connected to the support 13 by an insulator 20, an arcing member 22 mounted between insulators 21, 23 and adapted to receive the arc when the arm 11 opens, and an air-core magnetic blowout coil 25 which is included in circuit with the arc as soon as the latter forms. In the arrangement shown, the contact 15 is connected to the line conductor L1 by a conductor 24 and the coil 25 is connected between the conductor 24 and the member 22. The switch is arranged in series with a similar switch connected to the line conductor L2 and the two switches are operated simultaneously by the operating members 17, 18 through linkage mechanism 19. In a modification, the lines L1, L2 are connected to each other by means of two switch arms in parallel.
Patent GB-1435439-A (GB)
Title: Method of and apparatus for weaving a row of slide-fastener links into the edge of a tape
IPC: D03D35/00
Filed: 1974-05-15
Abstract: 1435439 Woven zip fasteners SUPLEX AG 15 May 1974 [6 June 1973] 21633/74 Headings D1E and D1K A helical coil zip fastener has two weft loops 6, 7 inserted into the same shed by needles 4, 5 which pass above and below a guide 2 for the helical coil 3 which is bound to the tape by two threads 9, 10 taken into the shed above and below the coil by the wefts 6, 7 and shed between picks to reverse their positions. Beating up, before shedding the threads 9, 10, causes the threads to pass over the end of the guide 2 and to enter between the convolutions of the coil to bind it tightly to the tape. At the far selvedge the weft loops are temporarily held by a wire 15. The threads 9, 10 may be shed twice between each pick so that one thread is always on top and one always under the coil (Figure 8, not shown).
Patent GB-1482191-A (GB)
Title: Apparatus for gasification of liquids
IPC: B01F33/40
Filed: 1973-05-07
Abstract: 1482191 Dispersing gases in liquids J J TODD 31 July 1974 [7 May 1973 8 June 1973 27 July 1973] 21661/73 27483/73 and 35964/73 Heading B1C A gas diffuser for immersion in a liquid comprises a hollow ring-shaped member with an inwardly facing surface which defines a passage for the liquid, which surface alone is apertured to permit passage of gas, the crosssection of the passageway for liquid being progressively increased by the non-apertured surfaces. Fig. 1 shows a toroidal sparger having apertures 4 in the inwardly facing surface 3; the apertures may be various arrangements of holes and slits. In Fig. 6 the ring-shaped member 8 is adjustably located in a draft tube 9 which can be supported in the bottom of the vessel containing the liquid by a suitable heavy base (see Fig. 5, not shown). A flow restricting member 17 increases the rate of flow and turbulence of the gasified liquid.