baber/WOPTO huggingface dataset:
Patent GB-1448082-A (GB)
Title: Process for prufiying isoprene
IPC: C07C7/148
Filed: 1975-04-22
Abstract: 1448082 Purifying isoprene STERLITAMAK OPYTNO - PROMYSHLEN ZAVOD PO PROIZVODSTVU ISOPREN KAUCHUKA 22 April 1975 16574/75 Heading C5E Isoprene, which has been prepared by the catalytic decomposition of dimethyldioxane and contains carbonyl compounds and cyclopentadiene as impurities, is purified by (a) passing at 40-70‹ C. through a bed of solid material which comprises an anion-exchange resin or an alkali and (b) fractionating the isoprene for (a) using at least 50 theoretical plates and a reflux ratio of at least 3. The alkali may be LiOH, NaOH or KOH which may optionally be supported on an inert carrier, such as alumina gel, silica gel, corndum, pumice and silicon carbide. Preferably 20-80 wt. per cent of the purified isoprene obtained from (b) is recycled to (a). The resin may be a reaction product of a chloromethylated copolymer of styrene and divinylbeznene with trimethylamine or a reaction product of epichlorohydrin with polyethylenepolyamine.
Patent GB-1171622-A (GB)
Title: Improvements in and relating to Electrical Connectors
Inventor: GODFREY WILLIAM THOMAS
IPC: H01R12/72
Filed: 1966-04-15
Abstract: 1,171,622. Edge connectors for printed circuit boards. BELLING & LEE Ltd. 14 April, 1967 [15 April, 1966], No. 16581/66. Heading H2E. In an edge connector body 1 contact-housing recesses 5 communicate with a central panelreceiving slot 2 through narrow slots 3 each contact having a portion 8 projecting into the central slot 2 through a slot 3, and having portions 7 which engage shoulders in a recess 5. Each contact comprises a resilient strip with two parallel slits near its upper end defining outer portions 7 and a central strip which is expanded to form a panel-engaging loop 8. A retaining aperture on the contact strip engages a projection 10 on the body 1, and a rigid terminal post 6 secured to the contact strip receives a wrapped connection. In modifications of the contact (Figs. 6, 7, 11, 12, not shown) the retaining aperture is replaced by a resilient locking lance (15) and the terminal portion 6 is integral with the contact strip. The terminal portion may be channelshaped with a struck-out tongue (13) engaging a shoulder on the body 1, or the strip may be folded double to form a terminal loop portion (6-6a). Insulating polarizing pegs may be located in some of the slots 3.
Patent GB-1414755-A (GB)
Title: Mixing apparatus
IPC: B01F3/04
Filed: 1974-04-17
Abstract: 1414755 Mixing and aerating apparatus; froth flotation apparatus BOLIDEN AB 17 April 1974 [19 April 1973] 16737/74 Headings B1C and B2H An immersion mixer comprises a rotary disc agitator 14 having on its underside radial straight or helical vanes 21, and at least one elastic self-closing nozzle 22 with a preferably vertical slot - shaped opening 24 for supply of a gas or liquid treating medium. There may be a ring of stator vanes 23. The vanes 21 extend at least 50% and preferably 60-90% of the distance between the centre and periphery of the agitator; the nozzle opening is arranged 0.1 R to 0.5 R from the agitator axis and 0.1 R to 0.33 R below the lower edge of the vanes 21, where R is the agitator radius. As shown there is a plurality of downwardly-sloping nozzles 22 detachably arranged on an annular manifold 25 (see also Figs. 3-5, not shown); they may be of neoprene rubber. The vessel 10 may have a rubber lining 13, the fluid supply pipes 26 be rubber covered, and the manifold 25 be of rubber with a metal reinforcing ring (34). The vanes may decrease in height towards the periphery of the agitator, preferably to such an extent that the cross-section of the channels between them also decreases. The apparatus may be used for aeration of sewage or in froth flotation.
Patent GB-950486-A (GB)
Title: Heat-treated photographic emulsions and their use
IPC: G03C1/498
Filed: 1960-05-12
Abstract: 950,486. Photographic emulsions and processes. KODAK Ltd. May 12, 1960 [May 13, 1959), No.16801/60. Heading G2C. The invention is based on the discovery that a photographic silver halide emulsion containing a chemical desensitizer can be rendered more sensitive by heating. Thus, a chemically desensitized silver halide emulsion layer may be uniformly heated and then given an imagewise exposure followed by normal photographic development. Alternatively, the desensitized emulsion may be heated imagewise and then given a uniform exposure. The emulsion layer may be heated by passing over a heated metal bar, e.g at 250C. or by contacting it with a surface which absorbs radiation uniformly or imagewise and irradiating the surface with infra-red rays. Alternatively, a substance absorbing infra-red rays such as carbon black may be incorporated into the emulsion. In this case, if the emulsion is inherently sensitive to infra-red, a single imagewise infra-red exposure will serve to heat-sensitize the layer imagewise and subsequently to expose it. The chemical desensitizer may be a nitrostyrylderivative of a heterocyclic quaternary ammonium salt, such as 1-methyl-2(p-nitrostyryl)-6-ethoxyquinolinium p-toluene sulphonate. Other densitizers specified are mercuric chloride, (NH 4 ) 3 RhCl 6 , 3, 5-dinitrobenzhydrazide, 4-or 5-nitro-benzo-1, 2, 3-triazole and their 5- or 6-chloro derivatives, 2; 3-dimethyl-6-nitrobenzthiazolium p-toluene sulphonate, 2-phenyl-benz-1, 2, 3-thiadiazolium bromide, N, N<SP>1</SP> -decamethylene -bis (quinoxalinium) perchlorate, methylene blue chloride, 2-(pdiethylaminophenyliminomethyl)-1, 6-dimethyl - quinolinium chloride, 2-(p-dimethylaminophenyliminomethyl)-3-ethyl-benzthiazolium ethosulphate, phenosafranine chloride, pinakryptol green chloride, 1, 3-diamino-5-methyl-phenazinium chloride and 3-methyl-2-bis (phenylazo)methylene-benzothiazoline. The invention may be used in the silver salt diffusion process. Specifications 447, 109, 465, 343 and 935, 290 are referred to.
Patent GB-485423-A (GB)
Title: Safety device for gas apparatus, and gas apparatus incorporating such device
IPC: F23N5/10
Filed: 1937-06-17
Abstract: 485,423. Valves. ASKANIA - WERKE AKT.-GES. VORM. CENTRALWERKSTATT DESSAU UND C. BAMBERG-FRIEDENAU. June 17, 1937, No. 16900. Convention date, June 17, 1936. [Class 135] A safety device for gas-heated liquid heaters of the kind in which the gas valve is held in the open position by an electromagnet so long as the magnet is energized by the thermo-current derived from one or more thermo-elements heated by a pilot burner has the electromagnet secured to the operating member of a water deficiency device and is arranged so that in the initial position of this device the magnet is pressed into contact with an armature carried by the valve member. This arrangement ensures that the gas valve can only be opened when the water is turned on after the pilot burner has been lighted. The water deficiency actuating device comprises a diaphragm 10 subject to the pressures on either side of an adjustable throttle 33 in the water conduit. Secured to the lower face of the diaphragm is a valve member 11 adapted, after the gas valve has been opened, to co-operate with a seat aperture 12 to regulate the water flow. Extending upwardly from the diaphragm is a spindle 7 secured to a plate 26 which carries the electromagnet 23 and also serves as an abutment for springs 8 and 24. The spring 8 serves to move the diaphragm towards its initial position while the spring 24 by pressing against an abutment 22 tends to separate the armature 21 carried by the valve 4 from the poles of the electromagnet. A diaphragm-actuated gas pressure regulator is arranged above the main gas valve 4. One pole of the electromagnet winding is connected to the casing and thus to the thermoelectric element 14 by way of the pipe 17 supplying the pilot burner 12. The other pole is coupled to the thermo-electric element by a cable 28 passing through a packed aperture 29.
Patent GB-905764-A (GB)
Title: Temperature control apparatus for electric heating elements
IPC: G05D23/24
Filed: 1960-05-13
Abstract: 905,764. Automatic temperature-control systems. RANCO Inc. May 13, 1960 [May 13, 1959], No. 16934/60. Class 38 (4). In an automatic temperature-control system for a heating element 10, an alternating current supply from terminals L1, L2 to the element is controlled by a switch 12 actuated by a hot-wire 18. The hot-wire is energized from lines L2, L3 through a step-down transformer 30 and a switch 22 having a contact mounted on a bi-metallic member 24 and a contact mounted on a frame 25. The member 24 carries a heating coil 27 on a leg 24a energized through a resistor 34, sensing the temperature of element 10, a a coil 28 on leg 24b, energized through rheostats 40, 43, and a coil 29 on leg 24b energized in series with the hot-wire 18. At low element temperatures the resistance of resistor 34 is low and the deflection of arm 24a due to coil 27 is greater than the opposing deflection due to coils 28, 29 so that the switch 22 remains closed and the element 10 is fully energized. At a pre-determined temperature the deflection due to coil 27 is reduced below that due to coils 28, 29 so that switch 22 are opened and coil 29 and the hot-wire 18 are deenergized. The temperature is maintained constant at the desired temperature by the opening and closing of the switch 22 under the action of coil 29. The rheostat 43 is manually adjusted by a dial 16 to set the desired temperature and the rheostat 40 is pre-set to adjust the boil-rate calibration.
Patent GB-965639-A (GB)
Title: Improvements in and relating to continuous forms
IPC: B41L1/32
Filed: 1963-05-01
Abstract: 965,639. Manifolding stationery. H. BIEL. May 1, 1963 [May 3, 1962], No. 17072/63. Heading B6A. Continuous form stationery comprises a number of superimposed webs 1 which are fastened together by punching out tongues 6 through the longitudinal margins, the tongues having side edges which extend in the longitudinal direction of the webs, and projecting end portions 6a which extend transversely. The margins of the webs are perforated at 2 and have feed holes 4 therein, and cross perforations 5 divide the webs into forms and allow the webs to be folded into a zig-zag or fanfold pile. The tongues 6 can be located in each set of forms as shown, or between adjacent holes 4. The webs can be glued together at the places where the tongues 6 are struck out, so that the tongues are glued together.
Patent GB-571010-A (GB)
Title: Improvements in the production of organic esters of cellulose
IPC: C08B3/22
Filed: 1943-10-18
Abstract: Cellulose esters of organic acids, obtained by esterifying cellulosic material with an organic acid anhydride in the presence of sulphuric acid as catalyst, are subjected to a preliminary ripening in solution in the presence of sulphuric acid, after which they are precipitated, redissolved, and then further ripened in solution in presence of an aliphatic polycarboxylic acid in an amount between 0.1 and 5 per cent of the original cellulose.  Cellulose material such as cotton, cotton linters, wood pulp, regenerated cellulose, or cellulose from grasses, straws, or hulls, may be employed.  The cellulose may be pretreated with acetic or formic acid, or a mixture of these acids, with or without sulphuric acid.  The polycarboxylic acid used for the ripening may be a saturated or unsaturated compound, and it may contain substituents such as hydroxyl groups or halogen atoms. Oxalic, malonic, succinic, dibromo-succinic, glutaric, maleic, fumaric, malic, tartaric, aconitic, tricarballylic, or camphoronic acid may be used.  When esterification is completed, the excess of anhydride is destroyed by adding water, and the cellulose ester is allowed to ripen in solution in presence of water and all or part of the sulphuric acid used as catalyst. This first ripening may be carried out until a cellulose acetate of acetyl value of 56.0 to 58.5 per cent calculated as acetic acid is obtained.  The cellulose ester is then precipitated by adding water and is well washed.  It is redissolved in aqueous acetic acid or other solvent and then an aliphatic polycarboxylic acid is added.  The second stage of ripening is then carried out.  The ripened ester is precipitated by adding water.  The cellulose ester obtained has a high degree of stability and may be employed directly without any further stabilizing treatment.  The process is applicable to the treatment of cellulose acetate, propionate, butyrate or other cellulose ester.
Patent GB-422908-A (GB)
Title: Improvements in the production of carbonates of the alkali metals other than potassium
IPC: C01B21/12
Filed: 1933-06-15
Abstract: The carbamates of the alkali metals, other than potassium, are produced by the reaction of carbon dioxide, ammonia and a salt of the metal the carbamate of which is to be produced, the reaction being conducted in aqueous ammonia containing water in the proportion of at least 10 per cent by weight on the quantity of ammonia and water and the carbon dioxide being supplied in the form of a solid compound of carbon dioxide and ammonia, e.g. ammonium carbamate, ammonium bicarbonate, ammonium carbonate, ammonium sequicarbonate or ammonium bicarbonatecarbamate.  The reaction may be conducted at 15 to 30 DEG C.  The examples relate to the production of sodium carbamate from sodium chloride, carbon dioxide being supplied as ammonium carbamate. Specifications 332,584, [Class 1 (iii)], 363,218, and 386,351 are referred to.  The Specification as open to inspection under Sect. 91 comprises also the production of carbamates of the alkali metals and the alkaline earth metals, the amount of water to be employed not being restricted, or a mixture of water, a diluent liquid such as ethyl alcohol and ammonia being employed; and the production of sodium carbamate by the reaction of sodium chloride with ammonium carbamate in aqueous ethyl alcohol, methyl alcohol or acetone. This subject-matter does not appear in the Specification as accepted.
Patent GB-656794-A (GB)
Title: Improvements in and relating to data-transmission systems and apparatus
Inventor: JOHNSON ERIC ARTHUR
IPC: G05D3/14
Filed: 1948-06-25
Abstract: 656,794. Electric follow - up systems. MINISTER OF SUPPLY. June 25, 1948, No. 17165. [Class 40 (i)] In a data transmission system, an input shaft rotates two 90 degrees spaced sliders 3, 4 (Fig. 1), over a potentiometer 2 energized from a balanced reference alternating supply, to pickoff signals whose amplitudes are respectively proportional to the sine and cosine of the angular displacement of the input shaft from a datum. The sine and cosine signals are respectively applied to the input of a degenerative amplifier 5, through a resistive impedance R differing in phase angle from the feedback impedance C2 of the amplifier by 90 degrees; and through a capacitative impedance C1 having the same phase angle as the feedback impedance. The phase angle of the amplified combined signal to the reference signal is equal to the displacement of the input shaft from datum, and the reference and amplified signals are transmitted over lines 6, 7 or otherwise to a remote station (Fig. 2) where a potentiometer 12 similar to that of the transmitter is balance energized by the reference signal. 90 degrees spaced sliders 13, 14 rotated by the output shaft pick-off signals proportional to the sine and cosine of the shaft displacement, which are combined and amplified at 16 after phase displacement to produce an output signal whose phase angle relative to the reference signal is the angle of shaft displacement from datum, as in the transmitter. The displacement signal from the latter is fed to a phase error detector 22 of the kind described in Specification 592,835, which also receives the receiver displacement signal. A direct output voltage proportional to the misalignment between the input and output shafts is developed and applied to a velodyne system comprising an amplifier 20 feeding a servomotor 18 which drives the output shaft into correspondence with the input shaft, and also drives a tachometer generator 19 whose output is fed back to the amplifier input to prevent hunting. The potentiometers may be linear. For coarse-and-fine transmission, two similar units employing the same reference signal may be geared together at the transmitter and receiver, and at the latter the servomotor may be automatically switchable for initial control by the " coarse " unit signal, and subsequent control by the " fine unit signal as the misalignment decreases. The phase error detector and velodyne circuit are replaceable by a two-phase A.C. servomotor driven by the transmitter and receiver displacement signals, which may be produced by magslip units operating as phase-shifting transformers.
Patent GB-1530099-A (GB)
Title: Magnetic reader
IPC: G11B5/588
Filed: 1977-04-25
Abstract: 1530099 Automatic control INTERNATIONAL BUSINESS MACHINES CORP 25 April 1977 [3 May 1976] 17185/77 Heading G3N A magnetic reader, particularly a reader having a rotating head for reading an oblique track on a stationary tape wound on a helical mandrel, is provided with an arrangement for moving the tape to compensate for a skewed track. The arrangement is initiated by failure after a succession of passes, to read the track and the tape is moved by an offset distance 116 during a non-transducing position of the head travel and returned by steps along a transducing path 35' to read the skewed data track. Facilities can be provided for calling-up one of a plurality of offset distances and a variable number of de-skewing pulses.
Patent GB-1356654-A (GB)
Title: Foam generators
IPC: A62C3/02
Filed: 1971-05-26
Abstract: 1356654 Foam delivery apparatus CHUBB FIRE SECURITY LTD 24 May 1972 [26 May 1971] 17193/71 Heading ASA [Also in Division F2] Foam delivery apparatus for fire fighting purposes includes a foam generator arranged to supply foam to a foam delivery tube 10 from the delivery end of which foam will be ejected when the apparatus is in use, wherein the foam delivery tube is provided with upstanding protuberances 16 at the bottom of its internal surface. The tube 10 is connected by a pivot joint 4 to a pipeline 2 whereby it can be swept through an arc of from 20‹ to 40‹; the axis of rotation of the pivot joint 4 being between 5‹ and 40‹ to the vertical. The protuberances may be formed by a sheet of expanded metal arcuate in section and adapted to lie in the bottom of the tube so that it extends around 0.1 to 0.2 times the inner circumference of the tube, and the protuberances, the upturned walls of the expanded metal extend upwardly in the range of 2% to 4% of the tube diameter. A further sleeve of expanded metal (18) Fig. 3 (not shown) may be inserted in the tube 10 remote from the end portion thereof containing the expanded metal sheet 16.
Patent GB-333975-A (GB)
Title: Improvements in the manufacture and production of organic compounds by dehydrogenation
IPC: C07C5/367
Filed: 1929-06-05
Abstract: 333,975. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). June 5, 1929. Catalytic agents, preparation, and treatment of; dehydrogenated organic compounds, catalytic production of.-Catalysts for the dehydrogenation of organic compounds comprise mixtures selected from cobalt, iron, metals of groups 5 to 7 of the periodic system, such as vanadium, molybdenum, tungsten, niobium, tantalum, chromium and manganese, and compounds of these metals particularly oxides, in admixture with each other or with additional substances such as lead, tin, zinc, cadmium, or their compounds, or solid oxides of the non-metals of the 5th group e.g. phosphorus, arsenic and antimony, or the corresponding acids or their salts, which are used after a pretreatment at temperatures above 200‹ C. with gases or vapours comprising compounds, particularly hydrogen compounds, of the non-metals of the 5th to 7th groups which are solid at room temperature, with or without hydrogen. Suitable compounds include hydrogen sulphide, hydrogen selenide, hydrogen phosphide, carbon disulphide and hydrogen iodide. Organic compounds which may be treated include mineral oils, benzines, napthenes, and products of the destructive hydrogenation of distillable carbonaceous materials, such as coal, tar &c. The process is carried out in the gaseous phase, and additions may be made of gases which take part in the reaction, or act as heat carriers, or maintain a partial pressure favourable to the reaction, e.g. nitrogen, carbon. dioxide, water vapour &c. Temperatures of 200‹ -300‹ C. and over, and increased, ordinary or reduced pressure may be employed. The process may be combined with the distillation of benzine by leading the constituents thereof boiling above 80‹ C. over the catalyst. The catalysts may be deposited on carriers, such as active charcoal or silica. Specific examples are: (1) Active charcoal is impregnated with ammonium molybdate, lead nitrate and phosphoric acid, and pretreated with hydrogen selenide at 300‹ C. (2) Ammonium tungstate, cobalt nitrate and antimonic acid is applied to active charcoal and pretreated with hydrogen sulphide at 350‹ C. (3) Ammonium vanadate, cobalt nitrate and phosphoric acid on active charcoal is pretreated with hydrogen and carbon disulphide at 350‹ C. (4) A mixture of uranium oxide, and cobalt oxide is treated with hydrogen and carbon disulphide at 350‹ C. (5) Ammonium molybdate, cobalt nitrate and phosphoric acid is applied to active charcoal and treated at 370‹ C. with hydrogen and carbon. disulphide. Specification 293,906 is referred to.-
Patent GB-477280-A (GB)
Title: A process for the production of waxes or mixtures of waxes
IPC: C10G73/40
Filed: 1936-06-22
Abstract: Waxes are obtained in the form of a fine powder by treating the molten wax with an aqueous solution or dispersion of an emulsifying agent, to form a wax emulsion which is then diluted and cooled to a temperature below the melting point of the wax. Natural or artificial waxes or mixtures thereof may be treated. Example, Molten paraffin wax is slowly poured into a boiling soap solution with stirring. Cold water is then slowly added with stirring.  Finely powdered wax separates and rises to the surface, from which it is removed, washed, and dried.  The soap may be formed in situ, for example by treating oleic acid with excess of alkali.  The soap liquor, after removal of the wax, is treated with hydrochloric acid and heated, whereby the fatty acid is recovered.  Specification 422,568 is referred to.
Patent GB-403393-A (GB)
Title: Improvements relating to vehicle washing apparatus
IPC: B60S3/04
Filed: 1932-06-18
Abstract: 403,393. Actuation of switches. LUCAS, Ltd., J., Great King Street, Birming- ham, and PYRAH, W. S., Hilltop, Mount Nebo, Taunton. June 18, 1932, No. 17298. [Class 38 (v).] In vehicle-washing apparatus of the kind in which water is supplied to a nozzle from a pump driven by an electric motor a switch controlling the motor is provided with operating means whereby the switch is opened when the pressure at the delivery side of the pump exceeds a predetermined amount. In the construction shown, the delivery pipe f of a rotary pump a driven by an electric motor b is connected to a pipe h leading to a flexible chamber i. The chamber is connected through a bell crank lever m to a switch k controlling the operation of the motor b. When the nozzle g is closed the pressure in the chamber i gradually increases until it is sufficient to open the switch and stop the motor.
Patent GB-314206-A (GB)
Title: Improvements in and connected with weights or sinkers for use with line fishing tackle
IPC: A01K95/00
Filed: 1928-06-14
Abstract: 314,206. Rawson, H. C. S. June 14, 1928. Sinkers. - A sinker comprises a hollow, and preferably transparent or translucent, body 1 of cylindrical form with hemispherical, conical or other shaped ends, having an opening 2 through which water enters. Small shot may be added to load the sinker. A wire 3 is secured to the side of the sinker and its ends 4 are arranged to hold the line.