baber/WOPTO huggingface dataset:
Patent GB-938880-A (GB)
Title: Polyacrylonitrile resins
Inventor: SHAW BERNARD LESLIE
IPC: C08F20/44
Filed: 1961-02-01
Abstract: Metals such as copper, silver, gold, rhodium, ruthenium and palladium are extracted from solutions of their salts by treatment with a polyacrylonitrile resin which contains combined oxygen and which is obtained by the polymerization of acrylonitrile in liquid ammonia containing an alkali or alkaline earth metal dissolved therein, followed by the addition of an alcohol to the reaction mixture.  The examples describe the application of the above treatment to aqueous solutions of: (4) cupric chloride; (5) sodium chloropalladate; (6) a mixture of ammonium chloroaurate and nickel chloride; (7) rhodium trichloride; (8) silver nitrate; and (9) ruthenium chloride, followed by the ignition of the resin to yield, in (5)-(9), the noble metal, and, in (4), cupric oxide. The process of (6) effects a separation of the gold and nickel.ALSO:Polyacrylonitrile resins containing combined oxygen are made by reacting acrylonitrile with a solution of an alkali or alkaline earth metal in liquid ammonia, and subsequently adding an alcohol to the reaction medium.  Preferred metals are lithium, sodium, potassium and calcium.  The preferred alcohol is ethanol.  Ether may be used as a solvent for the reactants.  The reaction mixture is treated with ammonium chloride prior to the addition of the alcohol.  The resulting polymers extract metals such as copper, silver, gold, rhodium, ruthenium and palladium from solutions of their salts.
Patent GB-923480-A (GB)
Title: Condensation process
IPC: C08F8/28
Filed: 1962-02-01
Abstract: A process for preparing polyvinyl acetals in an aqueous medium by reacting an aqueous solution of polyvinyl alcohol containing an acid catalyst with an aldehyde in the presence of an emulsifier, neutralizing the mixture and recovering the polyvinyl acetal is characterized in that the emulsifier is introduced into the reaction mixture in an amount of 0,04 to 0,2% by weight of the polyvinyl alcohol after at least 60% of the polyvinyl alcohol and at least 50% of the aldehyde have been added to the reaction medium and the temperature of the reactants has been raised to between 50 DEG  and 100 DEG C., the temperature being maintained within the said range while the mixture is agitated until the rate of reaction of the aldehyde with the alcohol is substantially reduced.  Preferably the emulsifier is added after the other ingredients have been completely added.  The emulsifier may be sodium or ammonium lauryl sulphate, dioctyl sodium sulphosuccinate, ammonium perfluorocarboxylates, sodium aryl sulphonates, adducts of chlorinated cyclopentadiene and maleic anhydride, partially neutralized polymethacrylic acid, alkylaryl sulphonates, sodium N-oleyl-N-methyl taurate, sodium alkylaryl polyether sulphonates, triethanolamine lauryl sulphate, di-ethylcyclohexyl ammonium lauryl sulphate, sodium secondary alkyl sulphates, sulphated fatty acid esters and sulphated aryl alcohols. Specified aldehydes are acetaldehyde, butyraldehyde and heptaldehyde. The acid catalyst may be sulphuric acid or para-toluene sulphonic acid.  The products may be compounded with plasticizers, e.g. triethylene glycol di-2-ethyl butyrate, dibutoxyethyl adipate and dibutyl sebacate, and used in the preparation of safety glass laminates.  Specification 566,004 is referred to.
Patent GB-861642-A (GB)
Title: Improvements in or relating to electromagnetically operated counter-actuating mechanisms
Inventor: WHITE ARTHUR BARWOOD
IPC: G06M1/10
Filed: 1958-02-06
Abstract: 861,642. Counting-apparatus. LANDIS & GYR Ltd. Jan. 29, 1959 [Feb. 6, 1958], No. 3906/58. Class 106 (1). In an electromagnetic pulse counter, means are provided to render the counter sensitive only to pulses exceeding a predetermined length. Energization of a solenoid 1 attracts an armature 2 against the action of a spring 11. The armature 2 carries a counter-actuating pawl (not shown) and an arm 18 bearing at its end a rotatable roller 16 adapted to co-operate with a cam surface 14 of an inertia member 12 pivoted at 13. A count is registered only when the pulse length is sufficient to allow the member 12 to be rocked about its axis and the roller 16 to drop into a recess 15 in the member 12. To avoid spurious counter-actuation by a short pulse of high voltage, the cam surface 14 is separated from the remainder of the bar 12 by a slot 19, so that such a pulse results in deflection of the cam surface 14 relative to the member 12, thereby reducing the torque applied to the member 12. The cam surface may be constituted by a separate element resiliently connected to the inertia member.
Patent GB-924912-A (GB)
Title: Improvements in or relating to the treatment of natural clays
IPC: C04B33/13
Filed: 1961-02-02
Abstract: The viscosity of natural clays is improved by ion exchange of the calcium or magnesium ions of the clay with sodium ions, usually by sodium carbonate in solution, and simultaneously adding 0,25 to 3% by weight of magnesium oxide powder.  The process may be effected by first humidifying the natural clay for example, hextonite with 10 to 20% water and then adding the magnesium oxide and sodium carbonate, after which the resulting mixture is pressed and dried.  The resulting clay may be used for, drilling sludges, sealing and as an agglomerant of foundry sands.
Patent GB-585305-A (GB)
Title: Display device
IPC: A47F5/08
Filed: 1945-02-17
Abstract: 585,305. Displaying. JOHNSON, F. S. Feb. 17, 1945, No. 4070. [Classes 3 (i) and 3 (ii)] A board for displaying articles and information comprises a backing 1 formed on its face with a plurality of holes 2 and/or slots 3. Over the face of the board is placed a selected one of a plurality of paper, textile &c. sheets 7, each sheet having some holes and slots which can be brought into register with some of the holes 2, 3 in the board. The location or number of the .holes is different in each sheet. Into the holes in the sheet, and the registering holes in the ooard, are inserted pegs 12 or tongues which support a bracket 13 on which an article 14 can be placed for display. The areas of the sheet 7 away from the holes and the articles 14 are available for advertising &c. matter. The sheets 7 may be in the form of a long strip wound on manually turnable drums 6, 8 at the upper and lower ends of the board. Idler rollers 5 guide the strip 7 between the drums 6, 8 and the face of the board 1. The strip 7 may be built up of a plurality of sheets hinged or linked together.
Patent GB-816718-A (GB)
Title: Pneumatic braking equipment, more in particular, in adjustable pipe connections inserted in said equipment
IPC: B60T17/22
Filed: 1957-02-08
Abstract: 816,718. Pneumatic brakes. FABRICA ITALIANA MAGNETI MARELLI. Feb. 8, 1957 [March 16, 1956], No. 4370/57. Class 103 (1). [Also in Group XXXVII] In order to prevent the likelihood of fluid leakage from joints, such as 1, 2, 3 and 4 in Fig. 1, where there is shown a branch pipe t to a pressure switch or indicating-device I in a pneumatic brake system, a pressure-switch, shown in detail in Fig. 4, is incorporated in existing pipe unions of known kind, such as that shown in Fig. 2. If the fluid pressure should fall below a predetermined value, the spring 18 moves plunger 15 to close contacts 13, 14, completing an electric circuit to an indicator or warning device. Italian Specifications 450,629, 480,529, 545,198 and 549,930 are referred to.
Patent GB-230248-A (GB)
Title: Improvements in or relating to fire bricks, crucibles or like articles required to withstand high temperatures
IPC: C04B33/02
Filed: 1924-02-22
Abstract: 230,248. Cobb, F. W. Feb. 22, 1924. Refractory substances.-Firebricks, crucibles, &c. are moulded from a composition consisting of one part of fireclay and two parts of glound pebble obtained from sand beds and comprising quartz, limestone, volcanic ash, and sandstone. Tessara may also be added, the proportions then being 3 parts of fireclay, 4 parts of ground pebble, and one part of ground tessara.
Patent GB-160640-A (GB)
Title: Improvements in oil cups
IPC: F16N7/04
Filed: 1920-02-14
Abstract: 160,640. Robinson, G. H. Feb. 14, 1920. Gravity-feed lubricators.-Shackle pins of vehicle springs are lubricated by an oil cup fitted with an outlet valve operated by vibration. The oil is delivered to a passage 16 in the upper pin. A stop adjusted vertically by a handle 13 limits the displacement of the valve, and a passage through the stem 12 admits air to the oil cup.
Patent GB-1143094-A (GB)
Title: Method and apparatus for controlling the acceleration of an electric motor
Inventor: WILLIAMSON KEITH HAROLD
IPC: H02P27/04
Filed: 1966-02-02
Abstract: 1,143,094. Control of A.C. motors. MULLARD Ltd. 2 Feb., 1967 [2 Feb., 1966], No. 4616/66. Heading H2J. When an induction motor is started, it is supplied at a frequency corresponding to maximum torque, and, before full speed is reached, the frequency is increased in accordance with the drop in motor current so that the motor continues to operate in the region of maximum torque. The motor may be supplied through controlled rectifiers associated with an oscillator comprising transistors 1, 8, pulses being produced on lead 9 to control the firing angles of the rectifiers. When the motor is accelerating, a signal representing the motor current is fed to the base of transistor 1. The current decreases as the speed of the motor rises, so allowing the frequency to increase. After the motor has reached full speed, a feedback signal may cause the current and frequency to increase together, thereby stabilizing the speed.
Patent GB-475569-A (GB)
Title: Process for the protection of transplanted cuttings and vegetables against cryptogamic diseases
Filed: 1936-02-17
Abstract: Ortho-oxyquinoline or its derivatives, salts, or homologues is used for treating seeds, cuttings, potatoes, onions or other tubers or bulbs to be planted, and the roots of transplanted plants so as to prevent attack by bacteria and fungi but to stimulate nitrogen bacteria in the soil.  The active substance may be used dry or in solution or mixed with other substances. Preparations referred to in examples are: (1) citrate of methyl-8-oxy-quinoline and kaolin; (2) the potassium salt of methyl - 8 - oxyquinoline - 5 - sulphonic acid and plaster; (3) an aqueous solution of o-oxyquinoline sulphate; (4) any salt of oxyquinoline or its substituted products followed by a coating of an inert substance.
Patent GB-1479544-A (GB)
Title: 1,2,3,4-tetrahydro-1-naphthylurea derivatives their preparation and their use
IPC: A23K1/16
Filed: 1975-02-03
Abstract: 1479544 Animal feed compositions AMERICAN CYANAMID CO 3 Feb 1975 [7 Feb 1974 (2)] 4621/75 Heading A5B [Also in Divisions A2 and C2] An animal feed composition for enhancing the growth rate of ruminant livestock, poultry and fur-bearing lanimals contains 25 ppm to 800 ppm of a compound of the formula wherein X is sulfur or oxygen; R, is hydrogen, C 1 -C 12  alkyl, C 1 -C 4  alkoxy, allyl, benzyloxy, (C 1 -C 4  alkoxy) carbonylmethyl, (C 1 -C 4  alkoxy) methyl, C 3 -C 7  cycloalkyl, benzyl, hydroxy, C 1 -C 4  hydroxyalkyl, monohalophenyl, mono (C 1 -C 4  alkoxy)-phenyl, 2-thiazolyl, 2-thiazolin- 2-yl, 2-pyridyl, dihalo-2-pyrimidinyl, pyridylmethyl, acetyl, benzoyl, amino, di(C 1 -C 4  alkyl) amino, (C 1 -C 4  alkyl) carbamoyl, anilino, (C 1 -C 4  alkyl) phenylsulfonyl, phenylsulfonyl, 1, 2, 3, 4-tetrahydro-1-naphthyl, or 2-[3-(1, 2, 3, 4- tetrahydro-l-naphthyl)ureido]ethyl; R 2  is hydrogen or C 1 -C 12  akyl; R 3  is hydrogen, C 1 -C 4  alkyl or hydroxy; R 4  is hydrogen or methyl; R 5  is hydrogen or iodine; R 6  and R' 6  are both hydrogen or both methyl; R 7  is hydrogen, amino, chlorine, cyano, C 1 -C 4  alkyl or C 1 -C 4  alkoxy; R 8  is hydrogen, chlorine, C 1 -C 4  alkyl or C 1 -C 4  alkoxy; R 9  is hydrogen, chlorine, C 1 -C 4  alkyl, C 1 -C 4  alkoxy, acetamido or -NH-CO-NHR 11  where R 11  is allyl, C 1 -C 12  alkyl or hydrogen; R 10  is hydrogen, C 1 -C 4  alkoxy or C 1 -C 4  alkyl; with the following provisos; (a) that when R 1  is H, R 2  and R 3  may be a C 2-4  alkylene group joined together to form with the intervening atoms a 5-7 membered saturated ring; (b) that when R 3  is hydroxy, then R 1  is other than hydroxy, benzyloxy or C 2-4  alkoxy; and (c) that at least four of R groups R, to R 10  are hydrogen; in a nutritionally balanced diet.
Patent GB-256870-A (GB)
Title: Improvements in inductances especially for wireless signalling
IPC: H01F27/00
Filed: 1926-02-18
Abstract: 256,870. Lissen, Ltd., and Richardson, R. P. Feb., 18, 1926. Inductances. - In a i r - spaced, air-cored, multi-layer inductances particularly for wireless signalling, the layers are spaced apart by winding them of different shapes or in different angular positions as viewed along the axis of the coil so that each layer touches the layer within it only at a few points, each layer comprising a number of succession turns are lying on, or forming, a smooth surface such as a prism. Each layer may be hexagonal, octagonal or of other polygonal form in crosssection with alternate layers parallel and adjacent layers displaced so that the angles of one layer are opposite the centres of the sides of the adjacent surrounding layer as shown. The conductors of one layer may be spaced apart with or without separators and may be wound in parallel, spaced turns or as in duolateral and honeycomb coils, or each turn may zig-zag not over the whole width of the layer so that two successive turns form a series of diamond shapes. Successive layers may be wound beginning from the same end of the coil. The coils may be made self-supporting by impregnation and may be mounted by a strap a on a plug-block c. The blocks c may have a transverse spring d extended to its faces at e and may be constructed as described in Specification 245,926.
Patent GB-696089-A (GB)
Title: Improvements in or relating to magnetron oscillators
IPC: H03C3/32
Filed: 1951-02-28
Abstract: 696,089. Magnetron oscillators. M-O VALVE CO., Ltd., and WILLSHAW, W. E. Feb. 27, 1952 [Feb. 28, 1951], No. 4937/51. Class 39(i) In a multi-cavity magnetron, a tuning auxiliary thermionic' cathode provided within one of the resonant cavities is slotted along its length to reduce eddy currents. The auxiliary cathode 22 is cylindrical and is arranged coaxially within a cylindrical resonant cavity 5. It is provided with end discs 19 through which the heater current is supplied. The slot 24 in the cathode cylinder 22 lies parallel to its axis. An example is given of suitable dimensions for the auxiliary cathode and slot in a particular magnetron. Simple circuits are given for modulating the magnetron and operating the auxiliary cathode intermittently, or continuously over a range of oscillator anode current where the change in the frequency shift due to the presence of the auxiliary cathode with oscillator anode current is found to compensate for the " frequency pushing" effect experienced when the oscillator anode current is varied from a given value. The magnetron may be strapped using two straps at one end of the anode block and four straps at the other end.
Patent GB-267689-A (GB)
Title: Improvements in internal combustion engines of the air-cooled type
IPC: F02B75/02
Filed: 1926-02-20
Abstract: 267,689. M³ller, G. W. Feb. 20, 1926. Spray carburettors. - A carburettor 9 is supplied with air under pressure through a pipe 8 from a cylinder cooling jacket 4 which is fed by a fan 3 driven by the engine. The carburettor is either arranged inside the jacket 4 or provided with a pipe 10 which transmits the pressure in the feed pipe 8 to the float chamber. The valve 7, controlling the exit 6 of the jacket, may be connected to a centrifugal governor. When the carburettor is arranged inside the casing 4, damage from back-firing is prevented.
Patent GB-769123-A (GB)
Title: Improvements in and relating to electric lamp sockets and adapters therefor
IPC: G03B15/04
Filed: 1955-02-18
Abstract: 769,123. Lamp caps and holders. GENERAL ELECTRIC CO. Feb. 18, 1955 [Feb. 19, 1954], No. 4957/55. Class 38 (1). [Also in Group XXI] An adapter for installing a photo-flash lamp 17 in a socket adapted to receive a larger lamp comprises a metal shell 10 having bayonetpins 11 and containing a hollow insulating insert 13 in the base of which is mounted a double-ended coil spring contact 18. This contact has a central portion 19 of reduced diaameter which is held in an aperture in the insert by end portions 21, 23 of larger diameter. Portion 21 engages the central contact of a socket and portion 23 the central contact of lamp 17, the cap 16 of which has a circumferential groove 29 engaged by a latch 30 on a strip 26 projecting through a slot 31 in the wall of insert 13 and retaining the lamp in position as well as forming the outer contact of the socket part of the adapter. To eject lamp 17 a portion of strip 26 extending outside the adapter is pressed, thereby releasing latch 30 and allowing spring 23 to eject the lamp. Fig. 6 shows a socket formed integral with a reflector 51 and having a central spring contact 55 mounted in the socket wall 56 similarly to the contact 18 in the previous embodiment. A latch and contact strip 57 similar to strip 26 is also provided.
Patent GB-1085572-A (GB)
Title: Electric store
IPC: G11C17/16
Filed: 1965-02-04
Abstract: 1,085,572. Semi-permanent matrix store. DANFOSS A.S. Feb. 4, 1965 [Feb. 5, 1964], No. 4974/65. Heading G4A. A digital data matrix read only store or translator comprises at each intersection of input and output lines a junctionless non- rectifying semi-conductor switching device (e.g. of 90% tellurium, 10% germanium) which can be set to a high or a low resistance state. A voltage exceeding a certain threshhold switches an element to its low resistance state, in which it remains until a current exceeding another threshold is passed through it, so that the store may be regarded as semi-permanent. The matrix may consist of a single layer of the material with conductors attached. The matrix may be used as a decimal to binary converter (Fig. 3, not shown). Switches in the input and output leads may be connected to a current source so that a required arrangement of switching devices can be rendered to their low resistance state to change the translating function of the matrix.
Patent GB-302835-A (GB)
Title: Improvements in counter-propellers for marine, submarine and aerial craft
IPC: B63H5/10
Filed: 1928-02-18
Abstract: 302,835. Meo, J. de. Feb. 18, 1928. Screw propellers. - The main screw propeller has a freely and oppositely-rotating counter screw propeller of the same dimensions and form, mounted axially behind it. The main screw propeller 3 is attached to a shaft 1 and the latter is extended to form a support for a counter propeller 5 which is freely mounted thereon. Between the two is a distance sleeve 9. Instead of being on the same shaft, the counter propeller may be mounted on a separate shaft in line with the main one.
Patent GB-1531817-A (GB)
Title: Continuous extrusion of thermoplastics materials
IPC: B29C48/32
Filed: 1976-02-10
Abstract: 1531817 Foamed extruded thermoplastics NOEL MARQUET & CIE SA 10 Feb 1976 [25 Feb 1975] 5187/76 Heading C3C [Also in Divisions B5 and E1] A tubular or solid section, of foamed thermoplastics material, is extruded from a die head in which, upstream of the die 1 from which the section is extruded, a liquid or paste medium is continuously applied to the outer surface of the material in a passage 4a in which the surface is then roughened by contact with a roughened surface of the passage 4a, e.g. comprising annular ridges or helical rifling, so that the medium penetrates the surface. The medium may produce a smooth or matt skin, or a coloration, or a coating of polymerizable reaction mixture, and may enable a foamed section to be drawn through a sizing die at higher speeds. The medium may comprise silicone oil which is water-soluble to facilitate its removal, or may comprise other specified substances. The medium is injected via ducts 5 which may open into an annular groove or extend radially or at an inclination, and a die mandrel 2 may also comprise a roughened surface and ducts for injection of the medium to produce a smooth internal skin in a tubular section, and ducts and a roughened surface may also be provided in mandrel supporting webs 3. In the examples: (1), a solid section foamed polystyrene rod is extruded with a 0À3 mm. silky-matt surface skin obtained from a watersoluble silicone oil medium; (2) the Fig. 5 section is extruded from foamed polystyrene, the silicone oil medium spreading around mandrel support webs to define planes of weakness 18 at which the section is separable into ceiling coverings 19; (3), and (4), a solid section foamed rod is respectively extruded from polystyrene and from polyethylene, with an exterior skin produced by the silicone oil.
Patent GB-1011277-A (GB)
Title: A mono-rail tractor
IPC: B61C13/04
Filed: 1964-02-07
Abstract: 1,011,277. Mono-rail locomotives. HEINRICH SCHARF G.m.b.H. Feb. 7, 1964 [Sept. 4, 1963], No. 5250/64. Heading B7L. A locomotive for mono-rail suspended railways in mines includes a propulsion motor 12, a control cylinder for a brake 13 and pressure cylinders 17 for counter-pressure rollers 18 all supplied from a common variable-output pump 16 which is driven by a diesel engine 15 or by an electric motor supplied by a battery and is controlled by a toothed contact element 19 engaging strikers 31 fixed to the track rail 10. . The motor 12 is connected by belt drives 22 to driving rollers 21 on two travelling mechanisms 11 connected to the locomotive by joints 23 to pivot about vertical and transverse axes. Bowden cables 35 or electric or hydraulic impulse transmitters connect the contact element 19 and the controls of the pump 16 to control starting, stopping, acceleration and deceleration of the locomotive. The brake 13 includes shoes 33 for engagement with a disc 34 on the shaft of the motor 12 and is applied when the cylinder 14 is exhausted to a reservoir 32 under the control of the contact element 19 or upon one of abutment surfaces 20 at each end of the locomotive meeting an obstacle. Braking may also be effected by restricting outflow from the motor 12. Couplings 24 provide for transmission of pressure fluid to trailers drawn by the locomotive for driving hoists &c. The diesel engine 15 is supplied with fuel from a tank 32 and is cooled by water supplied by a pump 26 from a tank 29 and a radiator 28 cooled by a fan 25.