baber/WOPTO huggingface dataset:
Patent GB-863845-A (GB)
Title: Separation of u by extraction
IPC: G21F9/12
Filed: 1946-01-25
Abstract: 863,845. Separation of uranium 233. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Jan. 25, 1946 [Jan. 9, 1945], No. 2593/46. Drawings to Specification. Class 39(4). Uranium 233 is separated from thorium which has been bombarded with neutrons and contains protoactinium 233 by subjecting a solution of the thorium to a plurality of precipitations and redissolving steps with a carrier which carries Pa<SP>233</SP>, redissolving the Pa<SP>233</SP>, allowing the solution to stand for the Pa<SP>233</SP> to disintegrate to U<SP>233</SP>, and extracting the U<SP>233</SP> with a solvent in the presence of nitrate ions. Thorium which has been irradiated with slow neutrons is dissolved in nitric acid, any, insoluble stearic acid or siliceous materialremoved, and the Pa<SP>233</SP> carried down by a precipitate of manganese dioxide. The manganese dioxide may be formed in the solution by adding manganese nitrate and potassium permanganate or sodium chlorate, or preformed manganese dioxidemay be used. The precipitate is separated and dissolved in a hydrogen peroxide-nitric acid solution, excess peroxide being removed by boiling; hydrazine or hydroxylamine may be used as a reducing agent in place of hydrogen peroxide. Addition of potassium permanganate produces another manganese dioxide precipitate and the cycle is repeated several times until the Pa<SP>233</SP> is separated from fission products, natural uranium, and most of the thorium. Preferably the potassium permanganate is added in two or more portions for each precipitation. The final solution is allowed to stand for about two months for the formation of U<SP>233</SP>; manganese nitrate or an alkali metal nitrate is then added and the U<SP>233</SP> extracted several times with diethyl ether. Dibutyl carbitol or hexone may be used in place of the ether. The U<SP>233</SP> may be returned to aqueous solution and further purified by processes involving ferric hydroxidehydroxylamine cycles, ammonium uranate precipitation, uranium peroxide precipitation, or precipitation with acridine hydrochloride and thiocyanate. Specification 860,753 is referred to.
Patent GB-160623-A (GB)
Title: A tool for use in repairing boots and shoes
IPC: A43D5/04
Filed: 1920-01-27
Abstract: 160,623. Gill, H. Jan. 27, 1920. Nailing, hand-tools for.-The handle of a paring- tool for boot soles is provided with a gauge 12 for setting out a line on the inside edge of the work and with pins or projections 13 for marking and spacing holes for rivets, nails, &c., and for use as scribers. The pins 13 may be replaced by a wheel or roller carrying teeth or points spaced apart.
Patent GB-730911-A (GB)
Title: Improved method and apparatus for manufacturing diaphragms and separators for electric cells
IPC: H01M50/457
Filed: 1953-01-29
Abstract: 730,911. Forming laps of glass fibres. AKTIEBOLAGET TUDOR. Jan. 29, 1953 [Jan. 30, 1952], No. 2650/53. Classes 120(1) and 120(3). [Also in Group VIII] Separators or diaphragms for electric cells comprising at least a first layer of glass fibres and a second layer are manufactured by spraying glass fibres, formed by feeding a glass thread across a stream of hot gas, onto the second layer in the form of a sheet. The second layer may be a glass wool mat, microporous rubber, or thermoplastic synthetic resinous material. A band of glass wool mat 2 consisting of coarse fibres, which may be bonded, is fed from roll 1 round guide rolls 3, 4 past a spraying device. The spraying device has a furnace 7 connected to a compressor and feed rolls 9a, 9b and guide member 10 for leading glass thread 11 across beam 8 of hot air from furnace 7, so that thread 11 is blown out into fine fibres which settle and form a layer on band 2. Water cooled plate 13 is provided behind band 2. Thermoplastic binding medium, which may be in powder form, e.g. starch, or binding medium dissolved in water may be supplied simultaneously through another spray jet 12 onto band 2 to increase adherence of the fibres, Powdered wood or other substances which improve the properties of the electric cell may also be sprayed through jet 12 or an additional jet. The coated band 2 is cooled by air suction through funnel 14 the air being distributed by screen 15, and passes round guide roll 5 in contact with driven roll 16, which ensures constant speed of movement of the band and compresses the sprayed layer of glass fibres, to roll 6. The separators are then cut from the band. In an alternative apparatus the glass fibres are sprayed between two glass wool mats to form an interlayer. The band may be passed stepwise through the spraying zone.
Patent GB-371845-A (GB)
Title: Means for securing the secrecy of electrically transmitted intelligence, signals and the like
IPC: H04K1/04
Filed: 1931-01-27
Abstract: 371,845. Secret telephony. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Jan. 27, 1931, No. 2677. Convention date, Feb. 28, 1930. Drawings to Specification. [Class 40 (iv).] In a system in which speech is divided into sub-bands, e.g. for scrambling or for transmission by separate channels, e.g. wire and wireless, or for transmission with different amounts of delay, the ranges of the initial filters overlap slightly, but where the subbands are sent over the same channel they are spaced by the usual modulating arrangements in a scrambler system or by auxiliary modulators in a differential delay system so that they do not overlap in the line &c,
Patent GB-693346-A (GB)
Title: Improvements in or relating to magnetic recorder head assembly
Inventor: CAMRAS MARVIN
IPC: G11B15/60
Filed: 1952-02-01
Abstract: 693,346. Magnetic recording and reproducing apparatus. INTERNATIONAL RESEARCH & DEVELOPMENT CORPORATION. Feb. 1, 1952. No. 2728/52. Class 40 (ii). A magnetic transducer head assembly comprises a number of heads; the; pole-pieces of each succeeding head being narrower than that of the previous head. In the embodiment described with reference'to Fig. 1, a construction is shown for recording two pairs of bi-aural tracks. The recording heads 12, 13 are in staggered relationship to each other, and the erasing head has poletips wider than those of both the recording heads together. The non-magnetic casing 14 is provided with a shoulder 31 to act as a guide enabling the tape to be accurately registered, one pair of tracks being recorded while the tape is travelling in one direction, and the other pair of tracks being recorded while the tape is travelling in the opposite direction. Strips 23, 24, 25 of high permeability material are embedded in the casing 14 to prevent cross-talk and pick-up between adjacent channels.
Patent GB-537928-A (GB)
Title: Improvements in the treatment of photographic films
IPC: G03B15/00
Filed: 1940-02-13
Abstract: 537,928. Intensifying photographic latent images. TECHNICOLOR MOTION PICTURE CORPORATION. Feb. 13, 1940, No. 2749. Convention date, May 5, 1939. Drawings to Specification. [Class 98 (ii)] - A picture is produced in a silver halide emulsion layer by forming an under-exposed latent image therein, intensifying the image by flashing the layer with infra-red radiation, and then developing it. The flashing may be applied for a fraction of a second only. Apparatus for flashing an exposed kinematograph film comprises a drum, preferably rubbercovered, over which the film is led from a supply reel to a take-up reel, and a fan-ventilated lamp-house provided with an aperture closed by a Corning infra-red filter No. 254 or Wratten filter No. 87, and located close to the drum surface. The method may be applied to sets of colour-record films, or to films bearing images in differently colour-sensitive emulsions either in superimposed layers or in a mixed-grain layer. Reference is made to intensifying the latent image by flashing the layer with visible light.
Patent GB-697897-A (GB)
Title: Improvements in circuit-arrangements for automatic gain control
IPC: H04N5/53
Filed: 1952-02-01
Abstract: 697,897. Television. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 1, 1952. [Feb. 5, 1951], No. 2750/52. Class 40 (iii). [Also in Group XL (c)] An automatic gain control (A.G.C.) circuit for a television receiver for negatively-modulated signals, in which the D.C. component is lost after the detector stage and subsequently restored, is characterized in that a stage of the receiver prior to the detector is periodically cut off, the A.G.C. potential being derived by peak detection of the modified video signal so obtained and subsequent to restoration of the D.C. The signal detector 7 is direct-coupled to a video amplifier 10, which is R.C. coupled to a further amplifier 13 direct coupled to the picture tube 17. Pulses derived from the line scanning generator 23 are applied to an I.F. stage 5 so as to cut it off for a short period (32, Fig. 3) subsequent to each line synchronizing pulse 28. This provides a reference level (i.e. zero carrier level) upon which D.C. restoration can be effected in the valve 13, which is provided with grid-leak and condenser bias for this purpose. A peak rectifying diode 19 is coupled to the anode circuit of the valve 13 and produces across load resistance 20 a D.C. output proportional to the height of the synchronizing pulses with respect to zero carrier level. The potential across resistance 20 is applied as A.G.C. to stages 2, 6 of the receiver. To prevent the impulses 32, which comprise " peak white " picture modulation, from appearing on the tube 17 corresponding blocking pulses are applied to the grid 27 from the generator 23.
Patent GB-716211-A (GB)
Title: Means for ascertaining the rate of flow of pulverised fuel
IPC: C10J3/30
Filed: 1952-02-02
Abstract: 716,211. Measuring fluid flow. FALLON, J. Feb. 2, 1953 [Feb; 2. 1952], No. 2824/52..Class 97(2)-[Also in Group XXIX] Means for ascertaining the rate of flow of pulverized fuel to a gas producer or other apparatus wherein the material is fed down a conduit has a feed channel positioned within the flow path of the fuel passing through the conduit at predetermined intervals to remove a proportion of the fuel to a by-pass which incorporates an automatic apparatus for indicating the weight of said proportion of fuel, said proportion of the fuel being returned by means forming part of the weighing apparatus into the main flow at a point beyond the feed channel. As shown pulverized fuel is fed down a shoot 4 to an endless belt 6 driven by a variable speed motor 7 which conveys it to a conduit 8 the lower end of which is connected to a conical member 9 within which is disposed a further conical member 10 connected to a conduit 11. Within the space defined. by these cones are disposed four equi-spaced feed channels 14 carried by a shaft 15 rotatable about its axis by motor 16. The space between the cones is closed as at 12 except for an aperture registering with a shoot 13 leading to an endless belt conveyer 18 supported by the load counter balancing mechanism of an automatic weighing machine 19. In use, the channels 14 are rotated and each conveys a certain amount of the fuel from conduit 8 to the weighing machine, this amount of fuel being returned to the conduit I by the conveyer 18. If the area of each feed channel 14 is arranged to be such that 1 per cent of the fuel is extracted from conduit 8, then the rate of flow through the conduit 8 can be determined by multiplying the weight on the conveyer 18 by 100.
Patent GB-547104-A (GB)
Title: Improvements in and relating to valves for bibcocks and the like
IPC: F16K3/26
Filed: 1941-03-03
Abstract: 547,104. Valves. COCKETT, J. A. March 3, 1941, No. 2826. [Class 135] A valve member for a bib-cock comprises a plate 3 with a ported depending tubular part 4 slidably engaging the seat aperture and with an upstanding spindle 1 adapted to engage a socket formed in the end of the screwed actuating spindle 2. An annular lead washer 6 encircles the tubular part and is prevented from spreading by a ring 9 frictionally engaging the plate 3.
Patent GB-196121-A (GB)
Title: Improvements in or relating to electrical resistances for use as generator field regulators or for other purposes
IPC: H01C10/38
Filed: 1922-01-31
Abstract: 196,121. Hodges, H. C. Jan. 31, 1922. Variable resistances.-A variable resistance for use as a generator field regulator or for other purposes comprises parallel cylindrical coils A. B with which contact is made by resilient members G', H' attached radially to a spindle E mounted between and at right-angles to the coils. A second pair of contact members G<2>, H<2> may be mounted below the coils. Opposite ends of the two coils are connected by a conductor, and the opposite contact members are connected by conductive screws J. The spindle E is provided with a hand-wheel E<1> and pointer E<2> above the casing F. The resilient contact arms may be replaced by separate brushes mounted with interposed springs near the end of supporting arms. Accord. ing to the Provisional Specification contact arms curved to fit the coils may be pivotally mounted in slots in supporting arms.
Patent GB-162752-A (GB)
Title: Improved material for sharpening and polishing razors and the like and process for making the same
IPC: C09K3/14
Filed: 1920-01-30
Abstract: 162,752. Egerton, J. Jan. 30, 1920. Sharpening-materials; metal polishes. - A material for use on a razor strop, which forms a sharpening and polishing composition when used with any razor paste, is obtained by burning (at a low temperature and with a restricted admission of air) vegetable fibrous matter producing a large amount of impalpable ash, for example, paper, Arundo arenarix, Equisetum aenarisera or Equisetum marilinium, or wood. A suitable apparatus consists of a fire chamber 2 with a door 3 and chimney 4, and a combustion chamber 6 with a feeding hopper 7 having a lid 8, an outlet 9 to the chimney 4 and provided with a regulator 10, and a door 11 with an air inlet regulator 12.
Patent GB-781685-A (GB)
Title: Improvements in or relating to pouring devices for containers
IPC: B65D47/12
Filed: 1956-01-30
Abstract: 781,685. Spouts for portable containers. CONTINENTAL CAN CO., Inc. Jan. 30, 1956 [April 22, 1955], No. 2978/56. Class 66. A metal top 6 for a container is formed with a tubular neck 12 into which a plastic nozzle 8 is pushed from below until a bottom flange 10 on the nozzle abuts the underside of said top 6, the nozzle 8 having an upper inturned edge 13 and being held against rotation by a plurality of circumferentially spaced indentations 15 in the neck 12. The top of the nozzle 8 is threaded to take a screw cap. The nozzle may have a recess 16 to accommodate the inturned edge 13.
Patent GB-681564-A (GB)
Title: Improvements relating to the cooling of fuel injection systems for compression-ignition, internal combustion engines
IPC: F02M55/00
Filed: 1950-02-06
Abstract: 681,564. Cooling fuel injectors. BRYCE FUEL INJECTION, Ltd., and GREEN, G. R. Jan. 23, 1951 [Feb. 6, 1950], No. 2995/50. Class 7 (iii). Part of the fuel delivered by a feed pump 4 to fuel injection pumps 1 is by-passed from the lowpressure chambers of the pumps through pipes 5 to cooling passages in the injectors 3 and is returned to the suction side of pump 4 through a pipe 8a connected to a pipe 86 returning excess fuel from the delivery pipe 8 to the storage tank, the delivery pressure of pump 4 being maintained constant by a non-return valve 9. The cooling fuel flows through an inlet 3a in the injectors, down a passage 6 connected to an annular space 7a formed in the needle valve stem 7, and passes around the upper part of the stem to the usual fuel leak-off branch 3c which is connected to the return pipe 8a. The injection fuel is fed to the injectors through pipes 2.
Patent GB-428599-A (GB)
Title: Improvements in keys for typewriting machines
IPC: B41J5/12
Filed: 1935-01-30
Abstract: 428,599. Typewriters. FAIRWEATHER, W. C., 65, Chancery Lane, London.-(Underwood Elliott Fisher Co. ; 342, Madison Avenue, New York, U.S.A.) Jan. 30, 1935, No. 3024. [Class 100 (iv)] Keys.-The character-disc is secured to a cup on the key-stem by means of a cap having a narrow internal flange or bead which is flush with the upper surface of the characterdisc, the arrangement providing a flush keytop of the same area as the cup. In the key shown in Fig. 2, a cup 13 supports a moulded disc 15 of celluloid, shellac, or the like having a character 16 embedded in the concave upper face. The disc has a rim 17 resting on the cup, and may have a part 18 fitting closely in the cup. The disc is secured by means of a cap 20 having a flange 19 flush with the disc, and ears 21 which are bent underneath the cup. The cup, being housed in the cap and cup, is protected against scratching and ignition. A neck 12 on the cup is driven on to the key-stem 11, and the disc has a slot 24 engaging the end of the key-stem. The disc may be replaced by a two-ply concave disc, the upper ply being transparent, and the character being printed on the lower ply. The lower ply is forced into the cap and rests on the cup, the flange of the cap being flush with the upper ply. In the key shown in Fig. 9, a two-ply concave disc 15 is formed with a brim 151 which rests on a thick cardboard bed 31 in the cup 13, and is engaged by a bead 30 on a cap 20 having securing- ears 21, the top of the bead being flush with the disc. The bead may be replaced by a flat flange.
Patent GB-442970-A (GB)
Title: Improvements in or relating to automatic fuzes for grenades
IPC: F42C14/02
Filed: 1935-01-30
Abstract: 442,970. Grenade fuzes. SOC. ALSACIENNE D'EXPLOSIFS, SOC. A.R.L., Richwiller, Haut-Rhin, France. Jan. 30, 1935, No. 3100. Convention date, Feb. 6, 1934. [Class 9 (i)] [See also Group XXII] Relates to grenade fuzes having a pyrotechnical portion comprising a detonator 18, a time fuze 14 and a percussion cap 24 in a tube 4, and a mechanical portion comprising an external lever 35 holding a spring striker cocked in a tubular body 1 adapted to be screwed to the grenade. According to the invention, the pyrotechnical portion when attached to the mechanical portion is sealed by a disc 9, made for example of tin, which is clamped between the two portions. As shown, the percussion cap end of the tube 4 fits into a sleeve 6 formed with an annular seat for a flange 8 on the tube, and the sleeve 6 presses the sealing disc 9 at 13 against a shoulder 10 in the body 1 when the bottom edge 11 of this body is beaded in. Waxed joints are preferably provided at 10 and 12. The tube 4 contains, starting from the bottom, a felt washer 21, the detonator 18 having a fulminate charge 20 in a perforated cup over a picric acid charge 19, a perforated felt wad 22 over the detonator, the time fuze 14 slipped into the end of the detonator tube and provided with conical priming plugs 16 at both ends, and the percussion cap 24 in a beaded frame 25. The spring striker has a stem 26 guided in a bearing 27 in the body 1, this bearing being open at the end to give visual indication that the striker is cocked. The flange 29 of the striker has a diametral rib 32 with a firing-point 33. Recesses 34 are formed in the rib to prevent it abutting against the beaded frame 25 of the percussion cap ; and grooves 31 are formed at the side of the flange to allow the gases to escape to and through the lateral slot 41 in the body 1. The external lever 35 is pressed from sheet metal with two cheek members 36 adapted to project through the slot 41 to hold the striker cocked. The lever is pivoted by a pin 38 in open trunnions 39, and is locked in the cocked position by a safety pin 44. The lever is made of pressed sheet metal with the two cheeks 36 pressed down and stayed by a metal plate 37, Fig. 2, secured by electric welding at a few points or otherwise.
Patent GB-100153-A (GB)
Title: Improved Manufacture of Perborate of Sodium.
IPC: C25B1/32
Filed: 1916-03-01
Abstract: 100,153. Deutsche Gold- &. Silber- Scheideanstalt, vorm. Roessler. March 10, 1915, [Convention date]. Sodium perborate, obtaining.-A solution of sodium carbonate and borax is electrolyzed in the presence of solid sodium perborate. This may be produced spontaneously or by temporarily cooling after electrolyzing some time. Preferably, however, the solid substance is added at or soon after the beginning of the electrolysis. The solution is also kept as nearly as possible saturated with borax by having solid borax present, or by adding it continuously or at intervals, stirring being advantageous. The raw materials are as free as possible from catalyzers, but if these are present, their effect may be neutralized by protective substances or substances assisting the reaction, for instance stannic acid, alkali bicarbonates, or mag nesium silicate. Substances producing such agents may also be used. Specification 14,292/15 is referred to.
Patent GB-451914-A (GB)
Title: Improvements in drains for gulleys, gutters and the like
IPC: E03F5/06
Filed: 1936-02-03
Abstract: 451,914. Gully grates. WOODROW, W. J., WOODROW, W. J., WOODROW, J. W., and WOODROW, A. C., (trading as WOODROW & CO., A. C.), 21, Farringdon Road, London. Feb. 3, 1936, No. 3191. [Class 107] A gully grating is pivoted at one end on an axis which passes through the opening between the end of the grating and the frame, the opening being provided with a number of grating elements, such as short bars, for preventing the entrance of foreign bodies. In the construction shown, the grating is formed in three sections 5, 6, 7, hingedly interconnected by pins 11. The section 5 is hinged to the frame 1 by two short coaxial pins 13 which engage in open ended slots 14 provided in the end two of a number of short bars 15 formed integrally with the frame and extending at right angles to the bars 12 of the grating. The frame is provided with a flange 2 on three of its sides, the remaining side 3, which is arranged against the kerb, being so constructed that its upper edge constitutes a support for the grating. The opposite edge of the grating is supported on a ledge 9 formed on the frame. In a modification the pins 13 extend outwards from end lugs formed on the section 5, one pin being mounted in an end bar 15 and the other in an enlargement of the frame.