baber/WOPTO huggingface dataset:
Patent GB-581995-A (GB)
Title: Improvements in or relating to the manufacture of co-polymerisation products
IPC: C08F214/06
Filed: 1943-12-09
Abstract: A process for the manufacture of vinyl chloride/ethylene alpha-beta-dicarboxylic ester copolymers, comprises the step of adding to the mixture of vinyl chloride and ester, during the polymerization reaction, such an amount of said ester as to maintain a substantially constant ratio between it and the monomeric vinyl chloride in the reaction mixture.  Preferably, the ester is added gradually or stepwise to the reaction mixture as the reaction proceeds.  The final ester content of the copolymer may be from 1 to 40, but preferably from 5 to 25 per cent by weight.  Specified esters are those of maleic or fumaric acids with aliphatic saturated alcohols or aromatic alcohols, such as ethyl, butyl, isobutyl, hexyl, benzyl or cyclohexyl alcohols. The copolymerization may be carried out in single phase with or without a diluent, or in emulsion, and can be accelerated by the presence of a peroxide catalyst such as benzoyl peroxide or crotonyl peroxide, or a persulphate such as ammonium persulphate, with or without heat to 20 DEG  to 65 DEG  C., but preferably between 30 DEG  and 45 DEG  C.  A portion of the total quantity of the ester required for the formation of the copolymer may be admixed with the whole of the required amount of monomeric vinyl chloride, the residue being added during polymerization so as to maintain the ratio of ester to monomeric vinyl chloride substantially constant.  An example describes the aqueous emulsion polymerization of diethyl maleate/vinyl chloride, the emulsion also containing the sodium salt of a sulphated mixture of cetyl and stearyl alcohols, di-sodium hydrogen phosphate, citric acid, ammonium persulphate and crotonyl peroxide.  The diethyl maleate is added in four stages.  The resulting copolymer gave a smooth sheet on rolling with dibutyl phthalate.
Patent GB-613809-A (GB)
Title: Magnetron and circuit therefor
IPC: H01J25/587
Filed: 1944-10-24
Abstract: 613,809. Magnetrons. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 24, 1944, No. 20675. Convention date, Dec. 31, 1942. [Class 39 (i)] [Also in Group XL (c)] In a magnetron, the anode structure 5, Fig. 2, defines a plurality of cavity resonators and surrounds a cold secondary emissive cathode 2, and one or more thermionic cathodes 4 are provided for the initial supply of primary electrons. The cold cathode 2 may be hollow, Fig. 2, two thermionic cathodes 4 and a control electrode 3 being disposed within it, or one thermionic cathode only may be used, the control electrode 3 being dispensed with, Figs. 3, 4 (not shown) and Fig. 6, or a single thermionic cathode 27, Fig. 5, may be disposed outside the cold cathode 26-anode space. In the arrangement of Fig. 2, oscillation is started by pulses from the source 11 which is connected across the control grid 3 and thermionic cathodes 4 and oscillation continues until the condenser 13 is discharged to a certain extent. Oscillation then stops, the condenser 13 is charged up again and the cycle of operations is repeated indefinitely. In a modified arrangement, Fig. 3, (not shown), the edges of the cold cathode are curved inwardly so that the curved ends also emit secondaries, and the control pulses are applied between the cold cathode and a single thermionic cathode. In a further modification, Fig. 4, the condenser 13 is replaced by an artificial line and the magnetic field is tapered along the axis being a minimum at the centre to prevent electrons reaching the end walls of the device. In another embodiment, Fig. 5, the cold cathode 26 is a rod or hollow cylinder and the cathode 27 is indirectly heated. In a further form, Fig. 6, the cold cathode 30 is hollow, is formed with a plurality of circumferential slots 32 and has a thermionic cathode 31 therein. Oscillation is started by control pulses in the same manner as in the arrangement of Fig. 3, but is stopped at the required instants by positive pulses applied to ring-shaped " absorber " electrodes 33. The cold cathode may be aluminium or an alloy, or of metal coated with barium or strontium oxides formed by the reduction of the carbonates in vacuum. Specifications 450,423, 582,489, 588,186, 590,549 and U.S.A. Specification 2,217,745 are referred to. The Specification as open to inspection under Sect. 91 describes an alternative form of anode structure, wherein interdigitated anode segments are connected alternately to the inner edges of upper and lower annular plates, the outer edges of the plates being connected by a cylindrical wall so as to constitute a single cavity resonator. This subject-matter does not appear in the Specification as accepted.
Patent GB-845304-A (GB)
Title: A clip for attaching a pipe assembly to a shaft
Inventor: FERNBERG ERIC BIRGER
IPC: F16L3/12
Filed: 1957-07-01
Abstract: 845,304. Pipe joints. F. T. PRODUCTS Ltd. June 4, 1958 [July 1, 1957], No. 20732/57. Class 99(1). [Also in Group XXV] A clip, for attaching to a hollow shaft 23 so as to hold a pipe assembly thereto, comprises a strip of C-shaped spring-material having a slotted body 11 extending to arms 12, 13, the former having a dish-shaped cap 16 formed therein and the latter having inwardly-directed flanges 19, 20 with roundededges 21, 22 respectively. The assembly consists of pipes 28, 31 integrally connected to a spigot 29 engageable with a hole 26 in the shaft 23. On attaching, the pipe 28 is threaded through the slot 14 and the arms 12, 13, having flared and lipped portions 17, 18 respectively, are forced open when pressed around the shaft 23. The cap 16 snaps over the spigot and presses it into the hole 26 and the pipes 28, 31 are held to the shaft 23. A helical spring 25 on the shaft 23 has at least one turn 33 positioned between the flanges 19, 20. The pipe 28 clears the slot 14 which is flanged outwardly at 15 to protect the pipe should it vibrate.
Patent GB-242237-A (GB)
Title: Improvements relating to the production of water gas
IPC: C10J3/00
Filed: 1925-08-19
Abstract: 242,237. Humphreys & Glasgow, Ltd., (Assignees of Chrisman, C. S.). Oct. 31, 1924, [Convention date]. Producers.-In order to maintain a more uniform temperature in a water-gas carburettor. steam is not allowed to extract heat therefrom, and the down-run gas is led directly to the holder. During the down-run, saturated or low temperature steam is supplied to an inlet 9 at the top of the producer 5, and the gas is led through a pipe 11 to the wash-box 8. During the up-run, the gas is passed through the carburettor 6 and fixer 7. In a modification, the plant includes an additional fixer or superheater and a waste heat boiler. Specification 230,217 is referred to.
Patent GB-856719-A (GB)
Title: Improvements in roof supports for underground mines
Inventor: COWLISHAW FRANK
IPC: E21D23/00
Filed: 1956-07-05
Abstract: 856,719. Mine roof supports. DOBSON Ltd, W. E. & F. June 24, 1957 [July 5, 1956], No. 20819/56. Class 20(2) A mine roof support comprises a forward hydraulic prop 4 and rearward hydraulic props 2, 3 connected by a hydraulic jack 6, 7 adapted to advance the props step-by-step in turn, the necessary contraction and extension of the props being controlled by relief valves 16, 17 operated by control means 14, 15 operated by movement of the jack under the control of the control valve 9. The valve 16 is operated to release the jacks 2, 3 by a lever 21 in which is pivoted a lever 22 carrying a stop arm adapted to be engaged, to open the valve 16, by a stop plate 18 on the jack cylinder 6 when lost motion connection 10 between the jack and the rear prop is taken up, on the initial contracting movement of the jack to move the props 2, 3. When the jack is fully contracted a rod 23 on the lever 22 engages a rod 28 on the forward jack which moves the stop arm to inoperative position and the valve 16 closes. The engagement of the rod 28 by the rod 23 moves into operative position a stop arm on the operating lever 26 of the valve 17 which is opened similarly to the valve 16, when the control valve 9 is operated to extend the jack to move the prop 4. The valve 17 recloses when the jack extension ceases and release of pressure on the stop arm allows the rod 28 and the valve 17 to be spring-returned. Liquid bleeds from the control valve 9 and the jack through non-return 'valves SV, SV1 Fig. 7 to reset the props 2, 3 and the prop 4 respectively. The control valve 9 comprises a cam 33 Fig. 6 which when moved in anti-clockwise direction opens valves VI, V4 to supply liquid from the supply line SL by a port O1 to the jack cylinder space 6b and to release fluid from the space 6a by the valve V4, to contract the jack and allows liquid from the release valve 16 to escape by the jack cylinder space 6a, the interior 7a of the ram jack and the valve forks V4 to the return line RL. Clockwise movement of the cam opens valve V2, V3 to supply liquid through the valve V2 and the interior 7a of the ram to the jack cylinder space 6a and release fluid from the space 6'b by the valve V3, to extend the jack, the relief valve 17 exhausting direct to the line RL. The relief valves 16, 17 also relieve fluid from the props when subject to excessive weight. Specification 854,967 is referred to.
Patent GB-788677-A (GB)
Title: Improvements in or relating to the preparation of soil improving agents
Filed: 1955-07-19
Abstract: A soil improving agent comprises a water-soluble salt, e.g calcium and sodium-calcium salts, of a copolymer of acrylic and/or methaacrylic acid with an ester or esters of either or both of these acids, e.g. the lower alkyl esters, together with a polymerizable monomer or monomers which are more water-soluble than methyl methacrylate, e.g. the amides and nitriles of acrylic and methacrylic acids, the copolymer being one which forms a water-soluble calcium salt, and an inert diluent therefor, e.g. kieselguhr, sand or soil. Preferred copolymers are those derived from methacrylic acid, methyl methacrylate and acrylonitrile and which have a molecular weight greater than 300,000.  Reference has been directed by the Comptroller to Specification 730,464.ALSO:Soil for cultivation is improved by applying thereto a water soluble salt, e.g. calcium and sodium-calcium salts, of a copolymer of acrylic and/or methacrylic acid with an ester or esters of either or both of these acids, together with a polymerizable monomer or monomers which are more water-soluble than methyl methacrylate, e.g. the amides and nitriles of acrylic and methacrylic acids, the copolymer being one which forms a water-soluble calcium salt.  Preferred copolymers are those derived from methacrylic acid, methyl methacrylate and acrylonitrile and which have a molecular weight greater than 300,000.    Reference has been directed by the Comptroller to Specification 730,464.
Patent GB-1528535-A (GB)
Title: Timepiece
IPC: G04B27/00
Filed: 1976-05-20
Abstract: 1528535 Clocks SEIKOSHA KK SEIKO KOKI KK and SUWA SEIKOSHA KK 20 May 1976 [23 May 1975] 20887/76 Heading G3T Rotary part(s) of a timepiece movement are mounted in facing portions of back and front case parts 1, 2, the conventional frame plates being eliminated. The clock described is driven by an electric stepping motor having a rotor 7 and a stator 6 carrying a coil 4. The coil is wound on a bobbin 5 a portion 5a of which supports electronic circuitry to pulse the coil. The spacing of the case parts is aided by the bobbin and by posts 35, 37 which also hold the stator. The latter carries a bearing 24 for a gear 8 which couples the rotor pinion to a wheel 9 fast on seconds shaft 14. A pinion on this shaft drives a gear 10 and thus cannon pinion 11, the latter driving minute wheel 12 and thus hour wheel 13. The case parts are of plastics and snap-fitted together, but they may alternatively be of aluminium and held together by posts with deformable ends Figs. 5, 6 (not shown). The hour and minute hands may be set by turning a knob 17, slip occurring between the wheel of gear 10 and its shaft 10b. The slip mechanism is described in detail Fig. 3 (not shown).
Patent GB-771893-A (GB)
Title: Improvements in or relating to blended textile yarns
IPC: D02G3/04
Filed: 1954-07-19
Abstract: 771,893. Yarns and threads; blending textile fibres. YARROW WOOL SPINNERS, Ltd., COLLEDGE, D.K., COLLEDGE W. M., and COLLEDGE, J. D. July 4, 1955 [July 19, 1954], No. 20954/54. Class 120 (3). A yarn is spun from a blend of lambswool, cashmere e.g. "cashmere noils ", real silk e.g. a first or second combing from the cocoon, and fur e.g. angora or opossum, in the proportions by weight of 15-40 per cent., 4+ per cent, 5-15 per cent., 45-65 per cent., e.g. 28 per cent., 5 per cent., 10 per cent., and 57 per cent., respectively. The components may be dyed separately and then blended by first blending the cashmere and silk together with an equal weight of lambswool, running this mixture through a teazing machine at a very slow rate, mixing this blend with the balance of the lambswool and the whole of the fur and adding an oil and water emulsion, and again teazing the whole of the fibre. If one fibre tends to form neps, such fibre may be teazed separately and added to the others during carding : if the fur tends to nep, then it may be separately blended with the lambswool and the full blend completed during carding.
Patent GB-1224567-A (GB)
Title: Room temperature curing resin and foundry sand composition containing same
IPC: C08G18/10
Filed: 1968-05-03
Abstract: 1,224,567. Phenolic resin compositions. HOOKER CHEMICAL CORP. 3 May, 1968 [19 May, 1967], No. 21109/68. Headings C3N and C3R. A composition comprises (A) a compound of formula where n is an integer for each molecule and has an average value of 0À2-6 for all molecules, each x is 1-25, each R 1  is H, F, Cl, Br, hydrocarbon, hydrocarboncarbonyl, or hydrocarboncarbonyloxy, each R 2  or R 3  is H, hydrocarbon, hydroxyhydrocarbon, halohydrocarbon, formyl or heterocyclic and each R 4  is organic such that the adjacent oxygen atoms are separated by 2 carbon atoms, and (B) a resin having an initial b.p. of at least 150 C., a viscosity of at least 100 cps. at 30 C. and an acid number of at least 20 prepared by distillation from carbonized pine wood. Component (A) may be prepared by condensing 1 mole of a phenol with less than 1 mole of an aldehyde or ketone and then oxyalkylating the product with an alkylene oxide, alkylene chlorohydrin or alkylene carbonate. Alternatively the phenol may be oxyalkylated before reaction with the aldehyde or ketone. The phenol may be phenol itself, the aldehyde formalin or the ketone acetone. Aldehyde/ ketone condensation catalysts specified are oxalic, sulphuric and hydrochloric acids. An alkyl benzene sulphonate wetting agent may be present during this reaction. Oxyalkylenation reagents specified include ethylene oxide, propylene oxide, ethylene chlorohydrin in ethanol and ethylene and propylene carbonates under nitrogen. Oxyalkylenation catalysts specified include NaOH, and K 2 CO 3 . Excess NaOH may be neutralized with oxalic acid. The composition may contain up to 10 times as much (B) as (A) and also a solvent and a hydroxy-containing polymer. The solvent may be xylene with or without diethylene glycol monoethyl ether monoacetate. 20-60% may be present based on the weight of (A). The hydroxy-polymer may be a polyester of chlorendic acid and trimethylol propane. Foundry cores and moulds may be made by mixing this composition and a polyisocyanate with foundry sand until the sand is coated with 1-5% of the mixture, shaping the product and curing it to a polyurethane. The polyisocyanate may comprise 3-5 phenylisocyanate residues linked by methylene groups. The composition may also include a polyurethane catalyst, e.g. NEt 3 , and cobalt naphthenate.
Patent GB-238388-A (GB)
Title: Improvements in machines for moulding bricks and like building blocks
IPC: B28B7/10
Filed: 1924-09-08
Abstract: 238,388. Banger, H. Sept. 8, 1924. Moulds. - In a portable block moulding machine of the type in which the moulded blocks are ejected by vertic ally - reciprocable plungers, the plungers are arranged to come into action successively, singly or in pairs, so that the resistance is overcome in stages. As shown applied to the machine described in Specification 180,505, the plunger stem F, carries a series of ejecting-plungers d<1> - - - d<4> which diminish successively in height so that upon operation of the lever G, the plunger d<1> comes first into operation and is followed by the others in sequence. Preferably the plungers are disposed in symmetrical pairs to avoid lateral strains on the stem E.
Patent GB-1460407-A (GB)
Title: Hydraostatic drive arrangement
IPC: B62D11/04
Filed: 1975-05-19
Abstract: 1460407 Hydrostatic transmission control CATERPILLAR TRACTOR CO 19 May 1975 [28 Aug 1974] 21209/75 Heading F2W In a hydrostatic drive system for a tracked vehicle wherein two hydrostatic transmissions 11, 12 each comprise a variable displacement swash-plate pump 13; 24 in closed circuit 17, 18; 33, 34 with a fixed displacement motor 14; 29, the motor speeds are maintained identical during low load straight travel by a pressure equalizing valve 38 which interconnects the high pressure lines of the transmissions when the pressures therein are below a predetermined value and blocks flow between the high pressure lines when the pressure in one of the lines exceeds the predetermined value. A spool 66 of the valve 38 is biased by a spring 72 to a position in which it provides a throttled connection between lines 44, 46 respectively connected through shuttle valves 39, 42 with the high pressure lines of the transmissions. The pressures in the transmission high pressure lines act through a line 90 and shuttle valve 91 on the end of the valve spool 66 which, when the pressure in one of the high pressure lines exceeds the predetermined value, is moved against the spring bias to block flow between the lines 44, 46. Thereafter the transmissions operate independently until the high pressures fall below the predetermined value and the valve 38 reopens. When the displacements of the pumps 13, 24 are adjusted differentially for steering purposes the flow through the valve 38 increases and produces a pressure differential between the lines 44, 46. The higher pressure in the line 44 or 46 acts through the line 90 and shuttle valve 91 on the end of the valve spool 66 to move the latter to a position in which it blocks flow between the lines 44, 46 and thus permits independent operation of the transmissions for steering purposes.
Patent GB-317207-A (GB)
Title: Improvements in combination gas and water valves
IPC: F24H9/20
Filed: 1928-07-24
Abstract: 317,207. Wiatt, J. P. July 24, 1928. Fluid-actuated fuel valves for water heaters.- A combination valve for the interdependent control of the supply of gas and water to a gas-fired water heater comprises a gas chamber and valve 5, 8, an intermediate or water-leakage chamber 10, and a water receiving chamber 11, the latter being provided with an internally tapered union member 16 and a floating disc 14 disposed on a spindle 9 extending from the gas valve. When water is passed 'through the water-chamber 11, the disc 14 is lifted and the gas valve 8 opened. The union member 16 is provided with hexagonal faces 19 or a knurled edge, whereby, when the cover 22 is removed, the union may be adjusted externally in relation to the water chamber 11, so as to determine the extent to which water is admitted to the heater before the gas is supplied. The intermediate chamber 10 acts as a reliefmeans in the event of leakage from the water chamber, the packing between the two chambers consisting of a hat or cup-leather 25 disposed on the spindle 9, as shown.
Patent GB-434901-A (GB)
Title: Improved frame construction for sheaf-binding harvesting machines
IPC: A01D67/00
Filed: 1934-07-23
Abstract: 434,901. Harvesting-machines. INTERNATIONAL HARVESTER CO. OF GREAT BRITAIN, Ltd., 259, City Road, London.- (International Harvester Co.; 606, South Michigan Avenue, Chicago, U.S.A.) July 23, 1934, No. 21447. [Class 6 (iii)] A sheaf-binding machine, adapted to be drawn by a tractor, is provided with a main frame member 3 of relatively deep and narrow box-like or tubular shape, the ends of this member being closed by brackets 4 provided with projections 5 that pass into the member 3 and are secured thereto by bolts 6. Frame bars 13, 14 secured to ears 9, 9a, at the upper part of the brackets, extend on the stubbleward side of the machine and support the binding mechanism ; these bars also extend a short distance on the other side of the member 3 to carry the pipe 15 to carry the seat. Other frame bars 16, 17, attached to ears on the lower portion of the brackets extend grainwardly to carry the platform 1. The main road wheel 2 is mounted on an axle carried at one side on a bar 22 extending between the bars 13, 14 and at the other in a bearing adjustable on the member 3. Rectangular apertures 11 are provided in the brackets 4 to take the stub axles of temporary transport wheels.
Patent GB-615898-A (GB)
Title: Improvements in voltage supply devices
IPC: H02M3/18
Filed: 1945-08-22
Abstract: 615,898. Electricity supply. GENERAL ELECTRIC CO., Ltd., and BROOKS, N. W. Aug. 22, 1945, No. 21456. [Class 38 (iv)] Condenser arrangements.-Condensers are charged in succession from one circuit and discharged in succession into a separate circuit or circuits to obtain electrically separate output voltages, or the arrangement may multiply the voltage. Each condenser c is connected to corresponding segments S1 and S2 on two commutators mounted on a common rotating shaft and pairs of brushes are connected respectively to the charging terminals DC and output terminals O. Additional output circuits may be obtained by providing additional pairs of output brushes displaced around the commutators. Voltage multiplication may be obtained by a series connection of the output circuits which may include the input brushes. The frequency of the output ripple may be increased by connecting in parallel pairs of output brushes so placed around the commutators that each condenser commences to discharge at a different instant. The condensers may rotate with the commutators or be connected to the segments through slip rings.
Patent GB-222289-A (GB)
Title: Improvements in automatic apparatus of the continuous type for purifying industrial oil
IPC: F16N39/06
Filed: 1923-08-25
Abstract: 222,289. Mertz, F. Aug. 25, 1923. Mineral oils, purifying; recovering waste lubricants.-In apparatus for the continuous purification of oils used in transformer tanks, tempering vessels, or the like, or for lubricating turbines, steam engines, &c., the oil on its course from the reservoir 1 of the machine M to a settling tank 11 and filter chamber 15 is passed in a thin horizontal film through a sighting device comprising a receptacle 4 having top and bottom windows disposed over or below an electric lamp L or other illuminant. Should the depth of oil in the receptacle 4 increase, as by stoppage of the outlet pipe 5, the light from the lamp can no longer pass through. The oil in the settling tank 11 is heated by a coil 12, and rises slowly along inclined baffles 13 until it overflows to the filter chamber 15. Separated water or other heavy bodies fall to the bottom and are discharged through a pipe 14. The oil passes by gravity through filtering elements 16, and is forced through a pipe 28 to the reservoir 1 by a pump 27. Each filter comprises a valve 19 mounted in a partition 17 of the chamber 15, a basin 20 to which is screwed a steel tube 21, and a wiregauze sleeve 22 and a hooded sleeve 23 of fabric secured as by rings 25, 26. The chamber 15 may be replaced by a manifold supplying the various filters 16. In a modified apparatus., the oil descends to the bottom of a cylindrical settling tank by a central tube, and rises along helical baffles; after filtration it passes to a storage receptacle that is immediately below the settling tank and is connected through a pump to the oil reservoir of the machine.