baber/WOPTO huggingface dataset:
Patent GB-980973-A (GB)
Title: Process for the separation of a mixture by means of a selective solvent
IPC: B01D3/42
Filed: 1962-03-21
Abstract: <PICT:0980973/C4-C5/1> <PICT:0980973/C4-C5/2> In separating organic mixtures containing hydrocarbons by selective solvent extraction using a higher boiling solvent, the extract phase is distilled in a column wherein less soluble materials which may be used as a reflux in the extraction are removed overhead (line 12, Fig.1), more soluble materials are obtained as a vapour sidestream 24, and solvent is recovered as bottoms 20, the column is fitted with a draw-off tray 22, allowing passage of vapours but impervious to liquid and situated below the point of introduction of extract 8, liquid accumulating on the tray is withdrawn (line 23) and reintroduced at least one theoretical stage below the tray and contacted with vapours present there and with a liquid material introduced between the tray and the point of reintroduction of liquid which liquid material comprises one or more main constituents of the side stream 27 and/or 28, or is a liquid boiling above the feed mixture and comprises at least one compound less readily soluble in the solvent.  When an extraneous liquid material is introduced this preferably boils 30-50 DEG  C. higher than the mixture and is recovered from the bottoms or by using a further draw-off tray 29, Fig. 2, when any solvent removed is recovered by decantation. The feed mixture may be a reformed gasoline, the liquid by-product obtained in cracking hydrocarbons to produce olefins, or the liquid by-product in the production of coke from coal and preferably has an end point not higher than 220 DEG  C. and an initial boiling point about 65 DEG  C.  Extraneous liquid material if used may be a raffinate obtained in the sulphur dioxide extraction of kerosine.  Suitable solvents are of the glycol or sulpholane type and may contain water.  The column may be packed or contains valve trays (Belgian Specification 591,929) or trays having zones with preferential discharge (Specification 764,650).  Steam may be injected into the bottom of the column when water will be recovered in line 27.  The liquid in line 23 may be heated, when vapours are removed and returned to the upper part of the column; liquid is re-introduced about 3 theoretical stages below the tray. The or each tray may comprise a series of two or more trays to prevent overflow.  Specifications 625,505, 659,241 and 717,725 also are referred to.
Patent GB-585471-A (GB)
Title: Improvements in or relating to electric measuring apparatus
IPC: G01R21/00
Filed: 1944-06-07
Abstract: 585,471. Wave-guides. FERTEL, G. E. F., BATT, R. W. L., and WRIGHT, C. S. June 7, 1944, No. 10958. [Class 40 (v)] [Also in Group XXXVI] Apparatus for measuring the energy in a high - frequency electric feeder or resonator 1, comprises a metal probe 3 for insertion in an opening 2 in a wall of-the feeder, a metal sleeve 4a surrounding with clearance at least that part of the probe extending through the wall, and means D connected between the probe and metal sleeve for detecting and measuring the high-frequency energy picked up by the probe. The probe is mounted inside a metal block 4 which can be slid along the wall of a wave guide for exploring the field distribution, the sleeve 4a being an extension having a length equal to the wall thickness. Alternatively the sleeve 4a may be in the form of a metal tube passing through an insulating block which rests on the guide wall. The constant clearance between the probe and the sleeve reduces variations in the reading due to variable capacity effects. The detector D may be a crystal, thermocouple or a thermistor bolometer.
Patent GB-255555-A (GB)
Title: Improvements in or relating to the dyeing of leather
IPC: D06P3/32
Filed: 1925-04-27
Abstract: 255,555. Lamb, M. C. April 27,1925. Emulsions, making.- Hydrogenated naphthalenes, such as the tetrahydro compound, are emulsified with or without the presence of halogen hydrocarbons, such as trichlorethylene or tetrachlorethane, by means of sodium, potassium, or ammonium ricinoleate, hydrogenated phenol or cresol soaps, sulphonated or soluble vegetable, animal or mineral oils, or salts of aromatic sulphonic acids or aromatic acids.
Patent GB-543673-A (GB)
Title: Improvements in respirators and the like
IPC: B60T11/22
Filed: 1940-06-29
Abstract: 543,673. Respirators. KINGAN, R., SADD, J. A., and TROTMAN, C. G. June 29, 1940, No. 11066. [Class 81 (ii)] The shapes of flexible face pieces of respirators are modified to enable them to fit faces of irregular contour by applying externally in the neighbourhood of the irregularity a patch of a shape suited to the adjustment required.
Patent GB-230663-A (GB)
Title: Improvements relating to cellulose-derivative compositions
IPC: C08L1/08
Filed: 1924-05-05
Abstract: 230,663. Lindsay, W. G. May 5, 1924. Cellulose-derivative compositions are rendered non-inflammable by incorporating in them calcium sulphate and a liquid phenolic phosphate such as tricresyl phosphate or a mixed cresylphenyl phosphate. Suitable proportions are 100 parts of hydroxylin, 50-100 parts of tricresvl phosphate, and 100-200 parts of calcium sulphate. The usual volatile solvents such as alohols, ether, acetone, amyl acetate, &c. are used. Specification 206,770 is referred to.
Patent GB-1105662-A (GB)
Title: Infrared radiation detector
IPC: G01S3/789
Filed: 1965-03-16
Abstract: 1,105,662. Logarithmic circuits. HUGHES AIRCRAFT CO. 16 March, 1965 [25 June, 1964], No. 11119/65. Addition to 1,071,121. Heading G4G. [Also in Divisions H3 and H4] In an infra-red position finder (see Division H4) a bearing error pulse signal is logarithmically amplified by amplifiers in cascade the first of which comprises an input differentiator 66, 68 and or transistor pair 71, 74 having a feedback circuit incorporating resistors 76, 77, diodes 79, 80 and Zener diodes 81, 82; for very low input signal levels the amplification is linear, for higher input signal levels the amplification is logarithmic, and for high input signal levels the Zener diodes break down to result in unity gain. The second stage, 88, is the same except that input differentiation may be omitted. The final stages 90, 91 omit the Zener diodes.
Patent GB-288979-A (GB)
Title: Electro-magnetic transmission gearing
IPC: H02K51/00
Filed: 1928-04-14
Abstract: 288,979. Jackson, L. Mellersh-, (Maschinenfabrik Esslingen). April 14, 1928. [A Specification was laid open to inspection under Sect. 91 of the Acts, April 17, 1928]. Electromechanical power-transmission systems. -In a transmission gear comprising two dynamoelectric machines of which the slip currents generated in one machine, acting as an electromagnetic coupling between driving and driven shafts, are supplied to the second machine to assist the driving, the slip currents of the first machine are also used to charge a battery supplying current for lighting or excitation or both. The battery B is in parallel with the field F and the first machine K and switch S, which may operate automatically at a given value of the slip current, places the field F, and armature M of the second machine in circuit as required. A switch S, may also be employed, this, in its lower position, causing a braking effect. A compound winding may be provided on the first machine to keep its torque constant within practical limits.
Patent GB-180520-A (GB)
Title: Mud splash guard for vehicle wheels
IPC: B60B7/00
Filed: 1921-04-18
Abstract: 180,520. Stewart, J. C., and McCune, R. April 18, 1921. Mud - guards rotating with wheels consist of an annular screen C of flexible material secured to the side of the wheel and held extended by a helical spring B enclosed in a pocket A. The means for attaching the guard to the wheel preferably consist of clips D.
Patent GB-549744-A (GB)
Title: An improvements in or relating to the production of splines
IPC: B24B53/065
Filed: 1941-09-04
Abstract: 549,744. Producing splines by grinding. BROWN & SONS (HUDDERSFIELD) Ltd., D., and ELLAM, L. Sept. 4, 1941, No. 11315. [Class 60] In the production of splines by grinding an abrasive wheel a, Fig. 1, having its flanks a' trued to the desired angle and having at the extremity of each flank a<SP>1</SP> a projection a<SP>3</SP> extending beyond the concave periphery a<SP>2</SP> corresponding to the root face of a gap between an adjacent pair of splines is fed into the spline gap a sufficient distance to form a longitudinal recess or groove b<SP>1</SP> at the root of each flank b<SP>2</SP>. The face a<SP>2</SP> is trued by a diamond c, Fig. 2, set to the required radius and limited in its swing by adjustable stops e engaging the lever f.
Patent GB-1158534-A (GB)
Title: Isocyanate containing Compositions and Processes for their Production
Inventor: KONIG KLAUS
IPC: C08G18/80
Filed: 1968-03-08
Abstract: 1,158,534. Diisocyanated compositions. FARBENFABKIKEN BAYER A.G. 8 March, 1968 [8 March, 1967], No. 11491/68. Heading C2C. A process for the production of diisocyanates which are liquid at room temperature comprises reacting 1 mol of 4,41- and/or 2,4<SP>1</SP>- diphenylmethane diisocyanate with 0À1 to 0À3  mol of a branched dihydroxy compound, e.g. a poly-1,2-propylene ether glycol of molecular weight 134 to 700 or a 1,3-propanediol having at least two alkyl groups. The isocyanate content of the products amounts to between 15 and 25%.
Patent GB-1248481-A (GB)
Title: A method of increasing the mechanical strength of a glass object
IPC: C03C21/00
Filed: 1969-03-04
Abstract: 1,248,481. Strengthening glass. COMPAGNIE DE SAINT-GOBAIN. 4 March, 1969 [4 March, 1968], No. 11508/69. Heading C1M. Compressive stresses are created in a surface layer of a glass object by, in a first stage, replacing alkali metal ions in at least one surface layer of the glass by smaller alkali metal ions by ion exchange at above the strain point of the glass, and, in a second stage below the strain point, introducing, by electromigration, into a surface layer alkali metal ions larger than those introduced in the first stage. The glass may be a soda-lime-silica glass, in which case Na ions may be replaced by Li ions at above 500‹ C., followed by introduction of Na or K ions by electromigration at below 450‹ C. The first stage ion exchange may be carried out by immersing the glass wholly or partly in a molten salt bath, e.g. of 66 wt. per cent LigSO 4  and 34 wt. per cent MnSO 4 . The bath may be contained in a borosilicate glass vessel jacketed with stainless steel. The second, electromigration stage is carried out in the apparatus shown, wherein a layer 1 of paste is placed on an aluminium support 2. The paste may be 48% (by weight) Al 2 O 3  and 52% KNO 3  or NaNO 3 . A platinum ring electrode 3 is inserted in the paste, and the glass sample 4 laid over the paste (the glass is referred to hereafter as a Na glass). Further paste 5 is added on top of 4, and a platinum disc electrode 6 applied. The electrodes are connected to a D.C. source so that Na or K ions migrate into the glass from the anodic layer 1. Ion migration occurs on a plane front through the glass. The four main variants of the process are, with reference to sheets of Na-containing glass:-(i) first stage ion exchange (replacing Na by Li) in both surfaces, followed by electromigration of K ions in one surface only, giving the stress profile Compression - Tension - Unstressed - Compression through the sheet; (ii) replacement of Na by Li in only one surface, followed by K electromigration into the same surface, giving a Compression-Tension-Unstressed profile; (iii) replacement of Na by Li in one surface only, followed by K electromigration into the opposite surface, giving a Compression-Unstressed-Compression profile; and (iv) replacement of Na by Li in one surface only, followed by electromigration of Na ions into the opposite surface, giving an Unstressed - Compression profile, wherein the compressed surface layer has the same composition as the remainder of the sheet.
Patent GB-646868-A (GB)
Title: Improvements relating to travelling carrier apparatus for ladders required to traverse sloping roofs or the like
IPC: E06C7/50
Filed: 1948-04-27
Abstract: 646,868. Ladders; roof scaffolding. RUNCIMAN, J. G. April 27, 1948, No. 11532. [Class 20(ii)] Travelling carriers readily attachable to ladders of standard construction required to traverse sloping roofs particularly for repair of greenhouses, comprise twowheeled bogies, one 7 running on the roof ridge and the other 8 on the ground or in the gutter 5 between two spans. The bogey 7 supports the upper end of the ladder in a cradle 14, Fig. 2, mounted on trunnions 24. The angle of the ladder is adjusted by means of a vernier adjustment comprising a single tooth on a clamping disc 32 which engages sets of radial teeth on the trunnion 24 and the bearing 23. Laterally adjustable L-shaped guides 26 keep the bogey on the ridge beam. The bogey 8 in the gutter 5, in place of the cradle 14, carries a jointed elbow device 12, Figs. 1 and 8, comprising two socket members 36, 37 pivoted together by bolts 40 and having a vernier adjustment by means of a bolt 44 passing through holes in the two socket members, the upper of which carries the ladder in the sockets 38 and the lower of which is carried by trunnions 41 in the bogey and is shaped at 42 to engage the bogey so that it can be locked firmly in position. The bogey 8 on the ground is provided with a socket device for the ladder locked firmly in position by the adjustable trunnions 41.
Patent GB-947254-A (GB)
Title: Pipe curing apparatus and method
IPC: F26B15/12
Filed: 1962-03-27
Abstract: 947,254. Rope railways, A. O. SMITH CORPORATION. March 27, 1962 [April 3, 1961], No. 11595/62. Heading B7L. [Also in Division F4] Reinforced synthetic plastic pipes 1, Fig. 2, on mandrels 2 pass through a curing oven 3 whilst simultaneously rotating about their axes, each mandrel being coupled to and supported by carriages 8, 9, Fig. 3, which move along laterally spaced beds 6, 7 respectively by means of rollers 26 mounted on one side of each carriage which run in channel tracks 21 and also by inverted channel guides 24 secured to a base-plate 23 at the other side of each carriage which are slidably supported on a rail 19 on each bed. Each mandrel has a mounting shaft 39 secured at each end by a clamp 40 to the inner end of a connecting shaft 32 of each carriage mounted in a journal 30 secured to the base-plate 29 of each carriage. Thrust and lock collars 35, 36 encircle the shaft 32 on carriage 8 to lock the shaft against axial movement but the collar 35 is omitted on carriage 9 to allow axial expansion of the mandrel to be taken up by lateral movement of the shaft 32 of the carriage 9. The outer end of the shaft 32 of the carriage 8 carries a sprocket 50 aligned with an endless drive chain 18 mounted in the oven 3 on sprockets 53, 54, and driven by a motor 61 for rotation of the mandrels. The mandrels are moved through the oven by upstanding blocks 46 secured to a drive chain 43 extending beneath the base plates 23 of the carriages for engagement with plates 48 thereon. The chain 43 is mounted for reciprocal movement between loading and unloading stations adjacent to entrance and discharge openings 4, 5 respectively of the oven to allow the chain to be driven, after unloading of the mandrels, toward the loading station or the carriages may be removed from the beds 6 and 7 and returned to the loading station by a suitable truck.
Patent GB-1171207-A (GB)
Title: Process for Manufacturing Sheet Materials having a Good Gas Permeability
IPC: D06N3/14
Filed: 1967-03-13
Abstract: 1,171,207. Coated sheet materials. KURASHIKI RAYON K.K. 13 March, 1967 [12 March, 1966; 22 March, 1966], No. 11632/67. Heading B2E. A sheet material having good gas permeability consists of a film of a polyurethane elastomer associated with a fibrous substrate, prepared by a method comprising coating a substrate, either the fibrous substrate itself or a transfer substrate, with a solution of polyurethane elastomer in organic solvent, coagulating the polyurethane elastomer solution with which the substrate is coated, washing, and drying the substrate, and, if the substrate is a transfer substrate, transferring the film of polyurethane elastomer formed on the transfer substrate to the fibrous substrate, the polyurethane elastomer being obtained by reacting a high molecular weight aliphatic polyester glycol having terminal hydroxyl groups, an organic diisocyanate, and a glycol having not more than 6 carbon atoms in the molecule and the polymer solution is adjusted to a viscosity of from 10 to 300 poise at 30 and a concentration of from 15 to 30% by weight. The polyurethane elastomer with which the substrate is coated is coagulated in a coagulation bath composed of a mixture of a solvent and a non-solvent for the polymer having a temperature of not more than 60C, but below the boiling point of both the solvent and the non-solvent, the solvent is an amount of not more than 9% by weight of the total amount of the mixture. The polyurethane elastomer solution may contain a filler such as carbon black.
Patent GB-666283-A (GB)
Title: Device for producing non-circular profiles
IPC: B24B19/08
Filed: 1949-05-02
Abstract: 666,283. Copy-milling. MANITFACTURE DE MACHINES DU HAUT-RHIN SOC. ANON. May 2, 1949 [May 8, 1948], No. 11697/49. Class 83 (iii). [Also in Group XXIII] Non-circular profiles are produced on work 1, Fig. 7, rotating at constant angular velocity by a flat-faced cutter 42 which receives axial displacements through a tappet 9a, Fig. 4, from an eccentric 4. This. eccentric comprises two separate eccentrics 21, 22, Fig. 5, which.are of equal eccentricity and arranged for relative angular adjustment in order that the effective eccentricity may be continuously varied between zero and twice that of one eccentric. The adjustment is effected by a hand wheel 23 connected by a gear train with the eccentric 22. A screw-operated clamp 28 locks the eccentrics together after adjustment. The speed of the eccentric is adjusted by a variable-ratio drive to suit the profile to be cut. The cutter 42 may be connected with the tappet 9a through a bushing 34 for the spindle of another tool with which it is held in contact by a spring 41. A motor 18 drives the cutter through belts and a worm drive 37, 38. The work is mounted between a headstock and tailstock (not shown) on a sliding table while the cutter 42 is mounted in a tool block which is free to swivel about a vertical axis so that one of a number of tools may be brought into operation and is adapted for adjustment in the direction of the axis of the work.
Patent GB-1002280-A (GB)
Title: Elastic wave generator and amplifier
IPC: H03F7/02
Filed: 1962-03-27
Abstract: 1,002,280. Electromechanical delay lines and amplifiers. RAYTHEON CO. March 27, 1962 [Sept. 1, 1961], No. 11766/62. Heading H3U. A delay line for use in the kilo-megacycle range makes use of a body of microwave gyromagnetic material in which are produced resonant magnetic spin modes of oscillation, these being coupled to longitudinal or shear-mode elastic waves in the body. As shown (Fig. 1), a microwave field h is excited in a rectangular cavity 15 coupled to an input waveguide by an iris 14. Situated opposite the iris is a disc 16 of yttrium iron garnet subject to a biasing field H produced by an electromagnet 29. The so-called " spin-modes " utilized in the invention are associated with the non-linear saturation effects obtained during ferromagnetic resonance and are to be distinguished from the uniform spin precession mode. The wave member (or inverse wavelength) of such modes is given by   Dk<SP>2</SP> sp  = He - H, where D is a constant, k sp  is the wave member and He is a limiting value of H for the spin modes and corresponds to the value of biasing field necessary for ferromagnetic resonance. The frequency of the spin mode generated depends upon the frequency of the microwave field and, under the conditions shown, is one half of the latter. It is stated in the Specification that coupling takes place between the spin waves and elastic waves in the body when the frequency and wave member of the two waves are substantially equal. Since the wave member of the spin wave depends upon the biasing field, this may be adjusted until coupling takes place and a magneto elastic waves are generated. The waves are substantially independent of the dimensions of the body 16. They give rise to shear or longitudinal mechanical waves in a quartz rod 19 which extends into a re-entrant cavity 22 where microwave oscillations are generated piezoelectrically. The quartz rod (which acts as a delay line) is supported in a tube 21 of PTFE which also surrounds the YIG disc 16. The disc and the rod are welded together with indium. In a modification described as an amplifier, two quartz rods respectively providing input and output mechanical-wave transducers are used. Both are coupled to a YIG disc situated in a microwave cavity. It is stated that, in all cases, the apparatus may be cooled by a liquid gas in order to reduce attenuation.
Patent GB-536004-A (GB)
Title: Improvements in audio-frequency amplifiers employing potential-variable capacity devices
IPC: H03G5/20
Filed: 1939-11-13
Abstract: 536,004. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., RUST, N. M., BRAILSFORD, J. D., OLIVER A. L., and RAMSAY, J. F. Nov. 13, 1939, No. 11779/40. Divided out of 522,476. [Class 40 (v)] [Also in Group XXXIX] An audio amplifier for obtaining automatic contrast so that with increase in high frequency interference the low audio frequencies are increased in amplitude, includes across the input of an amplifying valve a potential variable capacity device, biasing means and a control circuit. The Figure shows an amplifying valve V1 and a potential variable capacity VC, which may be of the kind described in Specifications 522,476 and 522,564, [both in Group XXXVI], together with a bias source. B and with a controlling voltage applied over resistance R<SP>11</SP> and obtained by rectifying the output of isolator valve V<SP>11</SP>, the output XC of which responds to the high audio frequencies or is a high pass filter.
Patent GB-949714-A (GB)
Title: Process for the production of highly-halogenated copper phthalocyanines
IPC: C09B47/10
Filed: 1961-03-30
Abstract: Halogenated copper phthalocyanines containing an average of 12 to 16 chlorine or chlorine and bromine atoms per molecule are made by heating copper phthalocyanine at a temperature of up to 100 DEG C. with a pyrosulphuryl chloride of the formula <FORM:0949714/C3/1> in the presence of thionyl chloride, and optionally in the presence of chlorine and/or bromine. Phthalyl chloride or phthalic anhydride may also be present when chlorination may be effected without using elementary chlorine. When bromine is used, copper phthalocyanine containing both chlorine and bromine is obtained. Halogenation catalysts such as iodine and antimony pentachloride may be used. Examples are given.