baber/WOPTO huggingface dataset:
Patent GB-1279221-A (GB)
Title: Process for producing polyamide acids without use of solvents, and polyimides therefrom
Inventor: STRICKRODT JORG
IPC: C07D487/04
Filed: 1970-01-30
Abstract: 1279221 Polyamide acids; polyimides E I DU PONT DE NEMOURS & CO 30 Jan 1970 [30 Jan 1969] 4640/70 Heading C3R A polyamide acid A is produced by reacting a dianhydride B and a diprimary diamine C at 20-120‹ C. with continuous intense mixing in the absence of solvents. B and C may have grain size # 0À8 mm., and grain size variation #0À5 mm. The mixers used may operate on the rotating and centrifuging principle. In an example 1 mole pyromellitic dianhydride and 1 mole dodecamethylene diamine were heated in a mixer at 50‹ C. yielding a product of grain size 1-10 mm. Polyimide D may be produced by heating A to a temperature T I  0-20‹ C. above the temperature T M  showing a maximum temperature difference in differential thermal analysis of A. For pyromellitic dianhydride, with ethylenediamine, T M  is 150‹ C.; with dodecamethylene diamine, T M  is 160‹ C. and T I  may be 170‹ C., yielding, after 90 minutes, a polyimide with softening point 395‹ C. Differential thermal analysis is performed by simultaneously heating a sample of A and a sample of an inert substance and determining the temperature difference between the samples.
Patent GB-1288336-A (GB)
IPC: C21C7/10
Filed: 1970-01-30
Abstract: 1288336 Refining with supersonic oxygen HOESCH AG 30 Jan 1970 [30 Jan 1969] 4666/70 Heading C7D A process of refining metal melts comprises blowing oxygen at supersonic velocity on to the surface of the metal which is under reduced pressure, in a vacuum chamber. The method is suitable for refining iron and steel melts especially chromium steel. The pressure of the gas jet at the point it enters the vacuum chamber may be less, preferably 25% less than the pressure in the vacuum chamber. A suitable apparatus comprises a vacuum chamber, for example a vacuum lift vessel 18, means for evacuating the chamber and an oxygen lance 25 having a Lavall nozzle projecting into the chamber and capable of producing a supersonic velocity jet of oxygen. A flap 27 may be provided to protect the nozzle 26 when not in use.
Patent GB-247971-A (GB)
Title: Improvements in or relating to apparatus for converting alternating electric currentinto direct current
IPC: H02K47/06
Filed: 1926-02-18
Abstract: 247,971. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Shand, E. B.). Feb. 18, 1925, [Convention date]. Systems for conversion employing rotary converters.-Means for converting alternating current to high voltage direct current comprise two or more rotary converters 7, 8 mounted on the same shaft as an induction motor 3, the stator windings 4 of which are connected to the alternating current supply lines 17 whilst the rotor is provided with a number of separate windings 5 connected respectively to the windings of the rotary converters, the latter being connected in series on the output side. The ratio between the pole numbers of the machines and the ratio between the numbers of turns in the windings 4, 5 is so chosen that the voltage generated in each of the windings 5 corresponds to half the voltage of the direct current lines 15, 16 in the case of two rotary converters. In the case of a 60-cycle supply and in which all three machines are provided with six poles, the set operates at 600 r.p.m. so that the frequency of the current supplied to the rotary converters 7, 8 is 30 cycles, and one-half of the power is transmitted by this current and one half is transmitted mechanically through the shaft causing the converters to operate as direct current generators. The field windings 10, 11 of the rotary converters are connected in series and energized by a separate exciter 9, and in order that the set may operate at unity power factor, compounding windings 12, 13 are provided.
Patent GB-832703-A (GB)
Title: Improvements in and relating to fluid analysis
IPC: G01N27/416
Filed: 1957-02-12
Abstract: 832,703. Electric tests. UNION CARBIDE CORPORATION. Feb. 12, 1957 [Feb. 13, 1956], No. 4722/57. Class 37. The concentration of a constituent in a gas is determined by mixing the gas with a reagent which changes in ionic content when reacting with the constituent to be determined, feeding the treated stream of reagent between and in contact with one of a pair of parallel electrodes and passing untreated reagent between the electrodes and in contact with the other so as to form a liquid interface between the solutions and measuring the potential between the electrodes as an indication of the concentration of the constituent. The invention is described with reference to determining the oxygen content of a gaseous mixture which with a solution of ammoniacal ammonium chloride enters a U-shaped passage 5 filled with glass beads in a block of plastics material. Some of the cuprous ammonium ions are ionized to cupric. The treated solution then passes through passage 7, passage 8 containing glass bead packing 9 and then through perforated or pervious electrode 1. Other gaseous constituents escape through vent 10. The untreated reagent enters passage 11 and passes between the electrodes and in contact with electrode 2, thus forming the liquid interface of a concentration cell. The potential between the electrode is amplified and indicated or recorded. The treated and untreated reagent mix in passage 13 and are fed to reservoir 18 containing metallic copper 19 which reduces the cupric ions to cuprous. Pump 26 then feeds the solution to conduit 4 to mix with the incoming gas to be tested and to conduit 11. The hydrogen chloride content of a gas mixture may be determined by scrubbing with water.
Patent GB-1373833-A (GB)
Title: Load distribution members for screw threaded fixing members
IPC: F16B43/00
Filed: 1972-02-01
Abstract: 1373833 Nuts; anchoring bolts W VON WOLFF and D BERTELSMANN [trading as MAX LANGENSIEPEN KG] 1 Feb 1972- [5 Feb 1971] 4732/72 Heading F2H An internally-threaded load bearing and distributing member 7 for use in a soft structural material 1 has a substantially frusto-conical body of plastics material and its outer surface 8 has slots 9. The slots stop a little short of the inner end 31 of the member so that when used with an anchor bolt 2, set using a two-component adhesive K, the member 7, together with a protective sleeve 5 seals the bore 3 to prevent the escape of adhesive. Sharp edges 20 cut into the material 1 as the bolt 2 is screwed into the bore to mix the adhesive. Alternatively, for use in harder materials, metallic cutting edges (27) may be wedged in grooves in the outer surface 8. In either case the slots 9 are shaped to take up excavated material. The outer end surface may include recesses 40 or projections (45) for engagement by a tool or for mounting other fastening members. As in Fig. 12 (not shown), by countersinking a member 7 at each end of a through bore in a wall, a bolt can be anchored in the wall without the use of adhesive.  The member 7 is preferably formed in two symmetrical complementary halves which are locally hinged together, the halves being snapfitted together as in Figs. 5-7 or Fig. 8 (not shown) for use.
Patent GB-216492-A (GB)
Title: Modification to the radiator of the lewis light machine gun to increase the cooling of the barrel, and adaptable to all guns
IPC: F41A21/24
Filed: 1924-02-25
Abstract: 216,492. Pelicano, M. F. May 22, 1923, [Convention date]. Void [Published under Sect. 91 of the Act]. Machine guns.-A finned radiator of the type used in the Lewis gun has internal longitudinal recesses E provided in the fins F adjacent to the barrel so that the induced current of cooling air may pass over the barrel as well as between the fins. The radiator, which is composed of an alloy of aluminium and zinc, has the radiation surface increased by transverse cuts G, as shown in Fig. 1.
Patent GB-477666-A (GB)
Title: Improvements in or relating to anti-dazzle devices for motor head lights
IPC: F21V11/00
Filed: 1937-02-17
Abstract: 477,666. Vehicle lamps. FRIPP, S. T. Feb. 17, 1937, No. 4757. [Class 75 (iv)] In a vehicle lamp fitted with a front extension comprising downwardly sloping transverse partitions disposed one above the other, the partitions are arranged in two or more tiers, one behind the other, with the partitions of one tier above or below those of an adjacent tier. The partitions may have reflecting undersurfaces and non-reflecting upper surfaces, those in one tier sloping at a different angle from those in an adjacent tier. The front extension may be of circular or oval cross-section, and it may be formed integrally with or be removably attached to the lamp casing. In the form shown in Fig. 1, the partitions 8, 9 are arranged in two tiers inside a tubular front extension 3 which has a slotted rear flange 5 whereby it is removably attached to a clamping ring 4 secured to the front of the lamp casing 1. The extension 3 may be provided with an opening 10 to permit some light to pass downwardly to the near side curb. In the form shown in Fig. 4, the partitions extend sideways through openings formed in the sides of the extension 3, whilst in the form shown in Fig. 5, the partitions are extended a sufficient distance sideways to enable the extension to be dispensed with. In these two last forms, the partitions are supported by rods 11 and are spaced apart by distance washers 12.
Patent GB-968875-A (GB)
Title: Improvements in or relating to the recovery of polymers
Inventor: COOPER WILFRID
IPC: C08F136/08
Filed: 1961-02-09
Abstract: Trans-polyisoprene is separated from a polymerizate by treating it in the presence of oxygen with a water-soluble organic liquid hydroxylic compound in an amount insufficient to precipitate trans-polyisoprene, adding water to the mix, and separating the phase containing the polyisoprene from the aqueous phase.  The polymerizate containing trans-polyisoprene is made by contacting isoprene in the presence of a hydrocarbon solvent or diluent, with a catalyst formed from a compound of a transition metal compound and an organometallic compound. Trans-polyisoprene may be recovered from the non-aqueous phase by cooling to precipitate the polymer, and filtration.  Prior to precipitation of the polymer the non-aqueous phase may be further treated to remove catalyst residues e.g. with a chelating agent such as ethylene diamine tetraacetic acid, or in an ion-exchange column. The hydroxylic compound is preferably a lower alcohol such as isopropanol.  The preferred catalyst is TiCl3 or VCl3 with Al(C2H5)3.
Patent GB-1003102-A (GB)
Title: Improvements in or relating to high-voltage rectifiers comprising a plurality of semiconducting elements
IPC: H02M7/06
Filed: 1964-02-05
Abstract: 1,003,102. Rectifying. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Feb. 5, 1964 [Feb. 8, 1963], No. 4849/64. Heading H2F. In order to improve the voltage distribution along a series stack of semi-conductor rectifier elements 4, a conductor neutralizing cable 5, connected at the high voltage end of the stack is arranged so that the capacitances between the stack and this cable neutralize the parasitic capacitances occurring between the rectifier elements and earth. To provide a linear distribution the conductor 5 may flare away as shown. Reference has been directed by the Comptroller to Specification 936,176.
Patent GB-408430-A (GB)
Title: Improvements in bogie frames for rolling stock and in the manufacture thereof
IPC: B61F5/52
Filed: 1933-02-17
Abstract: 408,430. Railway vehicle axle-trucks. METROPOLITAN-CAMMELL CARRIAGE WAGON & FINANCE CO., Ltd., and BAILEY, G. H., Metropolitan Road, Saltley, Birmingham. Feb. 17,1933, No. 4868. [Class 103 (vi).] The side frames of railway vehicle trucks are built up by welding together steel component members which comprise essentially a channelsection upper horizontal member a, preferably formed into a tubular section at its central portion b, a lower member d which is also preferably of tubular section at its central.portion, and upwardly and outwardly extending members g connecting the upper and lower members a, d and welded to the ends of the upper member either directly or through the medium of corner and side plates. In the construction shown in Figs. 2 and 3, each of the members a, d is of inverted channel section, the upper member being closed at its central part only by a welded strip c, while the lower member d is closed throughout its length by a strip f which is bent diagonally upwards to form the members g and then horizontally again at h where it is joined to vertical plates j closing the ends of the channels a. In addition vertical strips m connect the members a, d near the centre and receive the guides n for the ends and springs of the truck bolster, while the frame is completed by side plates k. In a modification Figs. 5 and 6, the channel a is upright and is covered throughout by the strip c, while the members d, g are made of inverted channel section by welding together two angle members t or v, and a flat strip s or u. Other modifications are described in which the bottom member is formed from a thick strip only, except at the central part where it is made tubular, and in which the inclined members g are replaced by members having a vertically extending part connected to an horizontally extending part. The axle-boxes may either be welded to the side frames or be made removable therefrom.
Patent GB-405805-A (GB)
Title: The manufacture of condensation products of castor oil and maleic acid esters
IPC: C08G63/50
Filed: 1933-02-17
Abstract: Plastic or syrupy materials obtained by heating castor oil with a half ester of maleic acid are compatible with nitrocellulose and may replace drying oils in oleo-resinous varnishes.  In an example, the reaction product of maleic anhydride, a -terpinol and castor oil is mixed with a natural or synthetic resin, a drying oil and cobalt resinate to yield a varnish.ALSO:Plastic materials are obtained by heating castor oil with a half ester of maleic acid obtained by condensing equimolecular proportions of a monohydric alcohol and maleic anhydride or acid. Suitable alcohols include cyclohexanol, cetyl, hexyl, capryl, benzyl alcohols, borneol, fenchol, a -terpineol, glycol or diethylene glycol monobutyl ethers, diethylene glycol monoethyl ethyl ether, oleic alcohol, cetyl alcohol, octadecanol and the higher alcohols obtained in the manufacture of methanol.  The products are syrupy, soluble in benzene, toluene, acetone, butyl acetate, petroleum naphtha and linseed oil and heat reactive. They are compatible with nitro cellulose and may be used therewith in the manufacture of coatings for fabrics, artificial leather, natural leather, paper, linoleum, rubberized fabric and regenerated cellulose, they may replace drying oils in oleo-resinous varnishes, or they may be mixed with natural or synthetic resins such as ester gum, resin, dammar, fossil gums or alkyd resin to make them more flexible.  Their properties may be modified by heating with fatty oils such as sardine oil, olive oil, cotton seed oil, rape seed oil, linseed oil, tung oil or soya bean oil.  In examples castor oil is heated with (1) mono-N-octylmaleate; (2) maleic anhydride and the mono-N-butyl ether of diethylene glycol; (3) maleic anhydride and a -terpinol; (4) maleic acid, N-cetyl alcohol and japan wax; (5) monohexyl maleate and sardine or other drying oil such as linseed oil; (6) maleic anhydride and cyclohexanol and (7) maleic anhydride and the higher alcohols obtained in methanol synthesis.  The product of example 3 may be mixed with a natural or synthetic resin, a drying oil and cobalt resinate to yield a varnish.
Patent GB-249831-A (GB)
Title: Improvements in or relating to flexible couplings
IPC: F16D3/72
Filed: 1926-02-20
Abstract: 249,831. PeignÚ, H. March 27, 1925, [Convention date]. Rivets.-In making a butt joint for uniting the sections of a built-up helix for use as a flexible shaft or universal joint, there may be employed a flat-headed bifurcated rivet I, Fig. 9, the prongs I<1> of which engage substantially semicircular holes in the coil parts C and in a circular butt-strap J, Fig. 13, those in the part J being countersunk.
Patent GB-656871-A (GB)
Title: Improvements in apparatus for generating wavelength modulated waves
IPC: H03C3/30
Filed: 1943-03-26
Abstract: 656,871. Frequency and phase modulation. PHILIPS LAMPS, Ltd. March 26, 1943, No. 4966. Convention date, March 26, 1942. [Class 40 (v)] [Also in Group XL (a)] Frequency or phase-modulated oscillations are obtained by subjecting a carrier-modulated electron beam, in a zone between an entry O and a collector A, to a variable magnetic field extending over a major portion of the zone and which deflects it in an arc and produces in it a variable time delay; if the variation is proportional to the integral of the intelligence to be transmitted, a frequency modulation is obtained. The beam from cathode K is modulated at G with a pure sine wave of stabilized frequency and at O enters a region of crossed magnetic and electric fields H and E respectively, describing a cycloid before impinging on anode A with a time delay depending on the value of the magnetic field. To reduce the length of the anode, the magnetic field is made up of a fixed part and a variable part. The electric field E may be omitted. The coils Q1, Q2 which produce the magnetic field may be part of the anode inductance of an integrator of the type in which an inductance of high impedance forms the anode load of a thermionic valve of low impedance. The alternative form of integrator in which a condenser of low impedance loads a high impedance pentode is also referred to.
Patent GB-490750-A (GB)
Title: Electro-dynamic devices for interconverting electrical oscillations and sound waves
IPC: H04R9/06
Filed: 1937-02-19
Abstract: 490,750. Loud-speakers; microphones. YOUNG, L., and YOUNG, A. Feb. 19, 1937, No. 4997. [Class 40 (iv)] An electrodynamic loud-speaker or microphone incorporates a diaphragm assembly which includes a member adapted to engage with the outer bounding surface of the centre pole proper of the magnetic system of the device in such a manner that upon movement of the diaphragm assembly as a whole whilst it is being fitted to or removed from the magnetic system the member functions to guide the coiled conductor, carried by the assembly, with respect to the said centre pole of the magnetic system. The diaphragm 8 has a cylindrical portion 7 on which the speech-coil is mounted and a flange portion carrying rings 10 which are located by means of a stepped portion 11 in the pole-plate 3. The guiding member 12 which is formed as a conical ring with apertures 15 and a cylindrical flange 14 co-operating with the centre polepiece 2 is clamped to the pole-plate 3 by screws 13 which also pass through the rings 10. The pole-plate 3 which is secured to a magnetic ring 4 by screws 5, is provided with holes 17 in which screws 16, normally carried by the base-plate 1, are rotated to effect the separation of the pole-plate 3 from the ring 4. Alternatively, Fig. 3 (not shown), the apertures through which the fixing screws pass are enlarged and provided with screw threads engaged by a threaded pin employed to effect the separation of the pole-plate and the magnetic ring. As shown in Fig. 2, the leads 18 from the speech coil are connected to insulated metal tabs 19 forming part of the diaphragm assembly and having apertures 21 which are engaged by associated terminal posts on the pole-plate when the diaphragm assembly is mounted in the recessed portion 11 of the poleplate 3. Specification 400,343 is referred to.
Patent GB-754702-A (GB)
Title: Improvements in or relating to automatic telecommunication exchange equipment
IPC: H04Q3/00
Filed: 1950-01-16
Abstract: 754,702. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. Jan. 16, 1950 [June 30, 1949], No. 4997/56. Divided out of 754,652. Drawings to Specification. Class 40 (4). The description is identical with that of Specification 754,652, but the claims differ. Specifications 700,088 and 754,655 also are referred to.
Patent GB-389970-A (GB)
Title: Improvements in electric signalling circuits with thermionic valves
IPC: H04L27/08
Filed: 1932-02-19
Abstract: 389,970. Valve amplifying circuits. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and ESPLEY, D. C., c/o General Electric Co., Wembley, Middlesex. Feb. 19, 1932, No. 5025. [Class 40 (v).] In a trigger relay circuit of the kind described in Specification 148,582, [Class 40 (iv), Telephones &c.], in which the output is independent of the input so long as this is above a critical value, the connection between the mutually.. reinforcing elements is inductive. The Figure shows valves VI, V2 arranged as anode-bend and leaky-grid detectors, respectively, and coupled by condenser C1 so that a signal applied to V1 is caused to change the grid bias of this valve due to change in the anode current of V2. The arrangement is completely self restoring since the signal is passed from valve V1 to valve V2 mainly by the signal frequency and not with the carrier frequency. Other forms of rectifiers and amplifiers may be used and a transformer coupling may be used instead of a capacitative coupling.
Patent GB-1457271-A (GB)
Title: Swing seat
IPC: A63G9/00
Filed: 1973-02-01
Abstract: 1457271 Swing seats CHARLES WICKSTEED & CO Ltd 13 March 1974 [1 Feb 1973] 5138/73 Heading A6M A swing seat comprises an oblong platform having a channel or channels 13 formed in its underside which receive a reinforcing rod or wire 17, held. therein by eyed chain bolts 18 by which the swing is suspended. The channel 13 may describe a rectangle in plan, the sides of which are near to the .sides of the platform. The platform may be made of polythene and may have strengthening ribs 12 and a flexible lip 14.
Patent GB-180027-A (GB)
Title: Process for the production of fertilisers containing phosphoric acid and potash
IPC: C05B13/02
Filed: 1921-02-15
Abstract: Alkali metal compounds, obtaining from complex silicates.  A fertilizer containing assimilable potash and phosphoric acid is obtained by melting together by means of coke, in a water-cooled blast furnace, a sufficient depth of a charge consisting of a mixture of a phosphate and a natural alkali silicate, such a leucite, phonolite, or feldspar, with the addition of limestone or marble or both, the proportions being preferably such as to give a product resembling Thomas slag.  The charge is completely fused, and, as it is drawn off, is disintegrated by a blast of high-pressure steam, air, water, &c.  The disintegration may be effected in a chamber constructed of wire netting so as to retain the dust but allow the gases to escape.  The column in the furnace is high enough to retain most of the potash and phosphoric acid volatilized in the melting zone, but a dust containing potash and phosphoric acid which may be added to the disintegrated melt may be obtained by filtering the furnace gases, which may then be used for heating the blast.  Oxygen may be used in the blast for raising the temperature.ALSO:A fertilizer containing assimilable potash and phosphoric acid is obtained by melting together by means of coke in a water-cooled blast furnace a sufficient depth of a charge consisting of a mixture of a phosphate and a natural alkali silicate such as leucite, phonolite, or feldspar, with the addition of limestone of marl or both, the proportions being preferably such as to give a product resembling Thomas slag.  The charge is completely fused, and as it is drawn off is disintegrated by a blast of high pressure steam, air, water, &c. The disintegration may be effected in a chamber constructed of wire netting so as to retain the dust but allow the gases to escape.  The column in the furnace is high enough to retain most of the potash and phosphoric acid volatilized in the melting zone, but a dust containing potash and phosphoric acid which may be added to the disintegrated melt may be obtained by filtering the furnace gases, which may then be used for heating the blast. Oxygen may be used in the blast for raising the temperature.