baber/WOPTO huggingface dataset:
Patent GB-794165-A (GB)
Title: Liquefied m-phenylenediamine compositions for curing epoxy ether resins
IPC: C08G59/60
Filed: 1956-08-07
Abstract: Liquid curing agents for liquid epoxy resins consist of a mixture of 50-90 parts m-phenylene diamine and 10-50 parts of a compound having the formula: <FORM:0794165/IV (a)/1> where A is O, NH, N-vinyl, N-alkyl or a compound of formula: <FORM:0794165/IV (a)/2> where R is hydrogen or alkyl, R1 is hydrogen, allyl or alkyl and R2 is alkyl. Examples (a long list of which is given) include 2-pyrrolidone and N(alkyl and N(vinyl) substituted 2-pyrrolidones; N(alkyl) and N(allyl) substituted formamides, acetamides, propionamides, butyramides, caprylamides and capramides; butyrolactone.  Mixtures of the above may be used, e.g. 2-60 parts N-methyl-2-pyrrolidone and 40-98 parts N-alkyl-formamide.  The compositions are melted to give mixtures liquid at room temperatures and thus can be added to the epoxy resin without exothermic action occurring; mixtures of m-phenylene diamine and N-methyl-2-pyrrolidone in ratio from 7.5-25 are all liquid at room temperatures.  Tables are given of casting resin mixtures varying from 100 parts epoxy resin with 15 parts m-phenylene diamine and 6.5 parts N-methyl-2-pyrrolidone to 100 parts epoxy resin, 12.2 parts m-phenylene diamine and 3.05 parts N-methyl-2-pyrrolidone.  Specification 759,225 is referred to.
Patent GB-770395-A (GB)
Title: Apparatus for effecting countercurrent contact of a liquid with adsorbent particles
IPC: B01J8/20
Filed: 1952-06-30
Abstract: Apparatus for effecting countercurrent contact of a liquid with a downwardly-moving column of adsorbent particles comprises an upright contacting vessel, means for supplying liquid to the lower section of the contacting vessel through a plurality of uniformly-distributed orifices spaced horizontally apart at equal intervals across the cross-section of the vessel, <PICT:0770395/III/1> <PICT:0770395/III/2> a plurality of uniformlyadsorbent - distributed laterally - spaced withdrawal conduits extending downwardly through the bottom of the contacting vessel, a vertical tube centrally-positioned of a plurality of laterally spaced uniformly distributed vertical tubes situated within the upper section of the vessel, the tube or tubes having lateral dimensions amounting to only a small fraction of the corresponding dimensions of the vessel so that only a small fraction of the horizontal cross/sectional area of the vessel is occupied by the tube or tubes, means for supplying adsorbent to the treated liquid arranged for withdrawaly upper ends of the tubes and an outlet for treated liquid arranged for withdrawal of liquid from the space in said vessel around the tube or tubes at a level between the upper and lower ends thereof.  The apparatus may be employed in the treatment of lubricating oils and lower-boiling petroleum fractions which are of low asphalt content with solid adsorbents for the purpose of removing small amounts of impurities of undesirable contaminants therefrom.  Thus, the apparatus may be used in the decolorizing of hydrocarbon lubricating oils with the aid of solid adsorbents.  In Fig. 1, adsorbent from conduit 12 enters vessel 10 through a plurality of pipes 18 and drops through tubes 20, which are suspended from the ends of pipes 18, into the body of treated liquid.  The adsorbent column 55 is supported on partition 30, spent adsorbent being withdrawn through conduits 37. The liquid is introduced through pipe 36 and passes through holes 50 in conduit 35 and then through nozzles 33 into the adsorbent column.  Treated liquid is withdrawn through pipe 23.  An alternative method of introducing the adsorbent into the apparatus is illustrated in Fig. 5.
Patent GB-790411-A (GB)
Title: Improvements in or relating to composite fabrics and methods of and apparatus for making same
Inventor: GABOR DENNIS
IPC: H01J9/16
Filed: 1954-08-20
Abstract: 790,411. Metallic fabrics. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 28, 1955 [Aug. 20, 1954], No. 24367/54. Class 45. [Also in Groups VIII, XVI and XL(a)] A fabric for an electrode array in a cathoderay tube consists of metallic strips 1, Fig. 1, crimped on to glass threads 2. Thin metal strips e.g., cupro-nickel 0À002 in. thick are formed on a carrier foil, e.g., nitro-cellulose 0À001 in. thick by a printing or photographic process. The composite foil is corrugated, fed with the glass threads and crimped by passing between successive pairs of rollers, or suitably shaped flat plates may be used. Finally the nitrocellulose is dissolved away in amyl acetate. Specification 739,496 [Group XL(a)] is referred to.
Patent GB-1155027-A (GB)
Title: Amino-Thiazolidine Compounds and process for their manufacture
Inventor: WOODWARD ROBERT BURNS
IPC: C07D499/00
Filed: 1966-08-30
Abstract: 1,155,027. Amino-thiazolidine derivatives and process for their preparation. R. B. WOODWARD. 30 Aug., 1966 [10 Sept., 1965; 9 Dec., 1965], No. 24388/68. Divided out of 1,155,020. Heading C2C. Compounds of the formula wherein Ac represents an acyl group, X represents the disubstituted carbon atom of the thiazolidine ring and R 1  stands for a free or functionally converted carboxyl group, may be obtained by converting the azido group in a 2,2-disubstituted-3-acyl-5-azidothiazolidine-4- carboxylic acid derivative of the formula into an amino group. The reduction may be effected with catalytically activated hydrogen, e.g. in the presence of a catalyst containing a metal of a Group VIII of the Periodic Table, under atmospheric or superatmospheric pressure, or with a chemical reducing agent such as nascent hydrogen, generated, for example, by reacting metals, metal alloys or amalgams with substances capable of yielding hydrogen. The reducing agent may also be a metal hydride, e.g. an alkali metal aluminium hydride, an alkali metal trialkoxy-aluminium hydride or an organo-tin hydride, a reducing metal salt, e.g. chromium-(II) compounds, metal stannites, metal arsenites or thioarsenites, or a sulphide possessing reducing properties, e.g. an alkali metal sulphide. The azido group in the starting material may also be converted to the amino group by first converting it into a phosphineimino group, e.g. by treatment with a phosphine, followed by hydrolysis. The above reaction may be effected in the presence of a diluent in a closed vessel under superatmospheric pressure and/or in an atmosphere of an inert gas. A resulting mixture of isomers may be resolved by conventional methods, e.g. fractional crystallization or distillation, adsorption chromatography; resulting racemates may be resolved by forming a mixture of diastereoisomeric salts with optically active salt-forming agents, separating the mixture into the diastereoisomeric salts and converting the isolated salts into the free compounds. In specific examples, the only examples of the radicals Ac and X which are described are the t-butyloxycarbonyl radical and a dimethyl-substituted carbon atom respectively. The products of the invention may be chemically modified by conventional methods, for example, an ester group R 1  may be converted to the free acid, or a free acid group R 1  may be converted to a functional derivative, many of which are described, e.g. ester, amide, azide, hydrazide, nitrile, azocarbonyl, or azidocarbonyl.
Patent GB-481132-A (GB)
Title: Improvements in or relating to television receiving systems
IPC: H01J29/18
Filed: 1936-09-07
Abstract: 481,132. Television. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Sept. 7, 1936, No. 24394. Convention date, Sept. 7, 1935. [Class 40 (iii)] [Also in Group XX] A television receiver comprises a screen which is made luminous by the continuous or intermittent incidence of ultraviolet light, the luminescence being modified in accordance with received image signals by means of a beam of energy incident upon the screen and controlled by the signals. In the arrangement shown in the Figure, a screen 1 coated with a compound of uranium or didymium, or the like, is irradiated by ultra-violet light from a lamp 2. A beam of infra-red light, modulated by a light valve 8 in accordance with received picture signals, is caused by a Nipkow disc 5 to scan the screen. If the irradiation from the source 2 is allowed to operate only during- picture framing intervals, the afterglow produced is extinguished locally by the scanning beam, and by arranging that the picture signals are reversed in phase before being applied to the light valve 8, a positive picture is produced on the screen. The quenching action of the infra-red rays may be assisted by maintaining the screen at a raised temperature. The average brightness of the picture may be controlled by varying the intensity of the irradiating source. In a modification, the invention is applied to a cathode-ray receiver, the screen of which is irradiated continuously or periodically by ultra-violet light from an external source. In this case the screen may be coated with a preparation such as zinc silicate or zincmanganese silicate, which emits orange-red light when irradiated with ultra-violet rays. The cathode rays change the colour of the light to green, tracing a negative picture on the screen, and the positive is seen by observing the screen through a red filter.
Patent GB-281428-A (GB)
Title: Improvements in or relating to pianoforte and like keyboards and transposing devices
IPC: G10G1/04
Filed: 1926-10-04
Abstract: 281,428. O'Neill, D. G. Oct. 4, 1926. Pianofortes, keyboard for; transposing-means; chord and note indicators.-To facilitate playing in different keys and transposing, the colouring of the keyboard is modified, and an indicatordevice is arranged behind the keyboard. Keys C, D and E are made black, and C#, D# white. The colouring of the raised (short) keys C#, D#. F#, G#, B#, is extended as an edging or edgings to the adjacent unraised keys as shown at S. The black and white colourings may be reversed. Each key is numbered as at H. The transposing device comprises a board W moved by a knob M along folding guides Y secured to the ends of the keyboard. The board W is marked with numbers I corresponding to those on the keyboard, with the names of the notes as at J, and with major and minor key-signatures at K. In transposing, the number I of the old key signature J is moved opposite that number H which corresponds to the new key-signature J, the difference between the numbers indicating the number of semitones transposed. A set of pointers Z is movable by a knob N on the board W to indicate the keynote, and also indicates the relative major and minor, and related keys. The board W may be moved by an endless chain, or a ra-ck and pinion.
Patent GB-761823-A (GB)
Title: Improvements in or relating to bipolar electrolysers
Inventor: BERGHAUS EWALD OBERSTE
IPC: C25B9/20
Filed: 1954-08-24
Abstract: 761,823. Electrolysis. PINTSCH BAMAG AKT.-GES. Aug. 24, 1954, No. 24586/54. Class 41. A bipolar electrolyser, e.g. for decomposing water, comprises a plurality of cells having insulating frames 1 holding electrodes 3 and diaphragms 4, each frame 1 having holes 5, 6, 8 ... 11, 17 and grooves 12, 13 in its face, the openings forming a plurality of chambers at two different levels and at least one duct 17 extending through the frames 1, the grooves 12, 13 in adjacent frames forming a plurality of channels through which electrolyte and gas passes to the chambers 8, 9 for filtering, the electrolyte being returned through the duct 17 and at least one channel 22 to the cells. The electrodes 3 and diaphragms 4 are held in openings 2 in alternate frames 1 which are bolted between end plates 7. Electrolyte and gas rise up the channels 12, 13 (which are in opposite faces of the frame 1 and hence deal separately with catholyte and anolyte) and pass along the chambers 8, 9, which contain removable filters for electrolyte, and through openings 14 in the end frame 1 to the chambers 5, 6 which contain cooling means for the electrolyte which leaves by a pipe 16 and is returned to the cells by duct 17 and associated channels 22 before or after mixing of catholyte and anolyte. Gas leaves chambers 6, 6 by holes 18 in the end frame 1 and enters chambers 10, 11, which contain cooling means, and is discharged to atmosphere. Fresh electrolyte is delivered to the electrolyser and electrolyte is discharged from it by a duct formed by holes 19 in the frames 1, the duct containing a rotatable, insulating tube having openings adapted to connect the cells with the interior of the tube. The centre planes of the electrodes 3 and diaphragms 4 may be equally offset from the plane of the frames 1.
Patent GB-199347-A (GB)
Title: Improvements in or relating to lock washers
IPC: F16B39/24
Filed: 1922-09-11
Abstract: 199,347. National Lock Washer Co., (Assignees of Golden, R. F.). June 14, 1922, [Convention date]. Washers.-An elastic washer 1 for use in locking nuts, is so designed as to distribute uniformly all the stresses to which it is subject, and comprises a split ring, forming a plain or undulating helical segment, radial lines in the upper and lower surfaces 2, 3 of which would meet at two common centres in the axis of the washer. The lines 4, 5 are projections from the upper and lower surfaces respectively. The washer may be of keystone cross-section instead of that shown. HelicaL washers cut from a continuous coil are given the desired form by pressure between two dies. The dies are cast from a pattern made from a plaster of paris model prepared by means of a wax model, which is made as follows. The edge of a thin brass cylinder is mounted vertically upon a base having an axial rod extending into the cylinder as far as the centre of the helical end. The cylinder is filled with wax, and the wax surface is then shaved down by a strickle pivoted in the end of the central rod and guided by a helical edge of the cylinder wall.
Patent GB-160202-A (GB)
Title: Improvements in and relating to gas manufacture
IPC: C10B7/10
Filed: 1920-07-10
Abstract: 160,202. Gratze, E. V. Hayes-. July 10, 1920. Retorts; coking processes.-In the distillation of powdered coal &c. by means of the exhaust heat of internal-combustion engines, the coal is fed from a perforated cylinder e and falls through tubes b arranged within a chamber a through which the exhaust gas passes. The distillation gas flows through a non-return valve c<2>, and washer c<3>, and the coke collects in a receptacle d. Part of the gas may be utilized in the chamber a to increase the temperature. The conveyer g within the perforated cylinder may be driven by the engine consuming the gas.
Patent GB-1078925-A (GB)
Title: Improvements relating to image reproduction systems
Inventor: HUMPHREY JOHN WILLIAM LEWIS
IPC: H04N1/407
Filed: 1965-06-11
Abstract: 1,078,925. Local copying by scanning. CROSFIELD ELECTRONICS Ltd. April 25, 1966 [June 11, 1965], No. 24811/65. Heading H4F. [Also in Division G1] In an image-reproducing apparatus in which a signal derived by the point-by-point scanning of an image is applied (e.g. via a computer for introducing corrections) to a synchronously scanned light source which is exposed to a photographic emulsion, the required exposure is determined by means of a gate circuit 6 which is controlled by a generator 10 synchronized with the scanning operation to extract an adjustable portion of the signal in each transverse scan, the selected signal portions being applied to a digital voltmeter 18 via an integrating circuit 14 and a non-linear circuit 16 which establishes a linear relationship between the voltage applied to the voltmeter and the density values represented by the voltage. The portion of signal selected is determined by a control 12 which adjusts generator 10. The generator is controlled by a deflection generator 8 which is synchronized with the scanning in the reproducing apparatus and supplies a horizontal time-base to a monitoring oscilloscope 4 connected to receive the image signal on the vertical deflection plates 2. In order to indicate the signal portion selected by gate 6, the output of generator supplies a brightening pulse to the oscilloscope grid. For apparatus in which the scanning is effected by means of a rotating drum, the signal selection by gate 6 may be controlled by a signal applied to generator 10 from a coil which is influenced by an adjustable magnetic polepiece carried by the drum. A second polepiece, which is not adjustable, and a second coil may be used to synchronize the oscilloscope time base with the drum rotation.
Patent GB-443576-A (GB)
Title: Improvements in centrifugal separators
IPC: B04C5/30
Filed: 1934-08-29
Abstract: 443,576. Centrifugal gas cleaners. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, WILKINS, G. J., Fraser & Chalmers Engineering Works, Erith, Kent, and CHELTNAM, C. H. W., and CHELTNAM, C. H., 188, Adelaide Road, Brockley, London. Aug. 29, 1934, No. 24853. [Class 23] In a separator of the cyclone type, the vessel 1 is divided into a number of separating chambers by transverse partition plates 5 which have central apertures for the passage of the clean gas, anc which leave an an nular gap 6 at the periphery for the passage of dust laden gas. The mixture passes in by a tangential entry 3 and the clean gas leaves by the outlet 4. A duct 7 con nects the upper peri phery of the upper chamber to the upper periphery of the lower chamber. Dust which would otherwise collect in the angle 10 then passes through a tangential passage to the duct 7 and drops to its lower end, from which it is drawn through a tangential passage into the lower chamber by the action of the vortices.
Patent GB-1471695-A (GB)
Title: Detecting defects in needles in knitting machines
IPC: D04B35/18
Filed: 1974-06-05
Abstract: 1471695 Proximity switches INSTITUT TEXTILE DE FRANCE 5 June 1974 [19 June 1973] 25027/74 Heading G1N [Also in Division D1] Apparatus for detecting defective needles in a, e.g. circular, knitting machine comprises magnetic detecting means 7, Hall effect or magnetoresistance, which are mounted so that the needles pass in front thereof, normal needles producing signals 11 while defective needles produce either larger signals 12, bent hooks or shanks, needles closed at the wrong time, broken latches resulting in accumulation of switches and, consequent displacement of the needles, or smaller signals 13, broken hooks, a first electronic circuit 14 identifying the signals 12 and emitting a control signal 18 to stop the machine, a second circuit 21, 22, 23 producing signals 26 in response to signals 11 or 12 and emitting a control signal 29 to stop the machine when there is a gap, indicative of a signal 13, in the chain of signals 26 of a duration dependent on the speed of the machine. The signals 18, 29 are fed through an OR gate 19 to a circuit 37 which extends their duration sufficiently to stop the machine. The detecting means may comprise a single probe, two probes as shown or four probes in bridge connection. Circuit 14 is a comparator, e.g. a Schmitt trigger, with a reference voltage 17. The output of a second comparator 21 is reshaped at 22 and fed to a retriggerable monostable circuit 23. The triggering time of the latter, i.e. the duration of the gap in signals 26 required to produce a signal 29, is set by an RC network 30, 31. To make that time dependent on the machine speed, an electronic control member 32 applies a voltage dependent on the frequency of pulses 26.
Patent GB-282514-A (GB)
Title: Improvements in surgical socks or insoles for boots and shoes
IPC: A43B7/22
Filed: 1926-10-09
Abstract: 282,514. Neal & Sons, Ltd., D., and Neal, H. J. Oct. 9, 1926. Foot - arch supports.-A foot - arch support is made without a toe portion and the upper surface 8 is inclined at the heel end from the inner towards the outer side 2 and also upwardly to an arch-support 7. The front part 9 of the device tapers off to a thin edge. The support may be made of spongy rubber and may be covered with asbestos, &c., the base 4 being of fabric or dampproof composition.
Patent GB-1459232-A (GB)
Title: Cigarette stripping
IPC: A24C5/36
Filed: 1974-06-07
Abstract: 1459232 Cigarette stripping machinery IMPERIAL GROUP Ltd 25 June 1974 [29 June 1973 7 June 1974] 31050/73 and 25365/74 Heading A2C A cigarette stripping machine comprises two parallel rollers 20, 21 mounted on different axes and spaced apart to form a nip less than the minimum diameter of a cigarette 12 to be stripped, and means for rotating the rollers 20, 21 in opposite senses at different circumferential speeds, each roller 20, 21 being provided with a helical rib 23 on its working surface, each rib 23 having an uneven outermost surface. In a modification (Fig. 4) the helical rib is provided by a pair of compressed intertwined helical springs 33, 34. The ratio of circumferential speeds may be between 1:1.25 and 1:6.
Patent GB-765487-A (GB)
Title: Sound reproduction apparatus for kinematographic projoctors
Inventor: ANTOINE HEURTIER
IPC: G11B15/34
Filed: 1954-09-01
Abstract: 765,487. Magnetic reproducing apparatus. ETABLISSEMENTS HEURTIER & CIE. SOC. A R.L. Sept. 1, 1954 [March 25, 1954], No. 25421/54. Class 40 (2). In or for use in a kinematographic projector, an apparatus, Fig. 1, for reproducing sound from a magnetic sound track carried by a kinematographic film 12 comprises at least one magnetic sound-reproducing head 9 against which the track is urged by resilient holding means 15, and, respectively before and after the head in the normal forward direction shown by the arrow, of the film, a first guide means 1,3  adjustable to receive various widths of film, and a second guide means comprising a freely rotatable shaft 20. As shown in Fig. 6, two heads 9 are secured in a casing 8 by plates 10, 11 which permit adjustment of the heads in directions respectively across the width of and towards and away from the plane of the film, the film is guided by V-shaped notches 13<SP>3</SP> in two support sections 13, 13<SP>1</SP> respectively fixed and pivoted to the casing 8, and the film is pressed against the heads by spring blades 16 attached to a film-pressing plate 15 pivoted on the casing 8 and urged by a spring 17 towards the film to an extent adjustable by a screw 18. The first guide means, Fig. 2, comprises a cylindrical carrier 1 axially adjustably secured by nuts to the frame 2 of the projector and recessed at 1<SP>2</SP> to receive an axially slidable member 3 between a V-notch 3<SP>3</SP> of which and a V-notch 41 of a cylindrical member 4 films of various widths may be guided with a pressure depending upon the force of a compression spring 6 acting between the carrier 1 and the member 3. Such force is adjustable through a screw-threaded engagement between an extension 3<SP>4</SP> of the member 3 and a cap 5, and a locking screw 7. The freely rotatable shaft 20 of second guide means, Fig. 12, carries a flywheel 22 and is engaged by a pressure roller 26 mounted on a lever 28 which is pivotally arranged and spring biased.
Patent GB-265499-A (GB)
Title: Improved means for supporting mosquito nets on bedsteads
IPC: A47C29/00
Filed: 1926-10-12
Abstract: 265,499. Malet, M. L. W. Oct. 12, 1926. Curtain poles and rods.-Corner posts a for attachment to bedsteads for supporting a framework carrying a mosquito &c. net, are each provided with a base b having a screwed projection c which is passed through a hole in one corner block g of the side irons &c. and secured by a wing nut d. The upper face of the corner block g is formed with a boss f to engage a recess in the base b.