baber/WOPTO huggingface dataset:
Patent GB-1097212-A (GB)
Title: Current control systems including controllable semiconductor rectifiers
Inventor: POPPINGER HERBERT
IPC: H02P9/30
Filed: 1965-03-02
Abstract: 1,097,212. Automatic voltage control. SIEMENS-SCHUCKERTWERKE A. G. March 2, 1965, No. 8958/65. Heading G3R. The field circuit of a generator 17 is controlled in dependence upon output voltage variations by a thyristor 5 in series with the field winding 6. The trigger circuit for the thyristor includes transistors 8, 9 and a capacitor 7 which charges up over a resistor 10 when the generator is started up. When the potential on the capacitor reaches a certain value thyristor 5 is triggered on by way of transistors 8 and 9; capacitor 15 then charges up to switch off transistors 8 and 9, but the thyristor 5 remains conductive until the next zero current point in the voltage supply to the field winding. If the output voltage exceeds a desired value, a transistor 11 is rendered conductive by a sensing circuit constituted by a voltage divider 2, 3 and a reference Zener diode 12, whereby the capacitor 7 discharges through the transistor 11. The time taken for the capacitor 7 to recharge through resistor 10 is thus varied by the action of transistor 11, so that the instant in the halfcycle at which thyristor 5 is triggered varies in a manner to keep the average excitation current at a value sufficient to maintain a constant output voltage. The control system may also be applied to rectifiers and inverters.
Patent GB-350602-A (GB)
Title: A collapsible hen coop and sitting box
IPC: A01K31/16
Filed: 1930-03-21
Abstract: 350,602. Poultry coops. HUDSON, G. T., Ardenville, Pickford Green, Allesley, near Coventry. March 21, 1930, No. 9019. [Class 5 (ii).] A collapsable sitting-box or coop is made from sheet metal, the edges of each part being folded so that the box may be assembled or disassembled by sliding movement of the parts. The arrangement of the parts is shown in the drawings, Fig. 1 being a horizontal and Fig. 2 a vertical section. The base G comprises a metal frame covered with wire netting. The front C has slots to accommodate bars, serving to retain the hen while allowing the chickens their liberty, and is provided with a door hinged to open upwards to provide shade and shelter in front of the coop.
Patent GB-476016-A (GB)
Title: Improvements in and connected with vertical steam boilers
IPC: F22B13/02
Filed: 1937-03-30
Abstract: 476,016. Vertical steam boilers. JOHANSSON, B. March 30, 1937, No. 9027. Convention date, Sept. 3, 1936. [Class 123 (ii)] A boiler with an internal furnace chamber 4 is supplied with water from a superposed feed heater B separated from the top of the boiler by a flue space 11 through which the furnace gases from the boiler flue 7 pass to a flue 12 extending through the heater. The flow of water from the heater to the boiler is controlled by a float valve 17 operated by the rise and fall of the boiler water level. The top and bottom plates of the furnace chamber are curved to facilitate the connection of inclined water tubes 1 which extend through the chamber. The heater may contain coiled tubes connected to the boiler steam space.
Patent GB-578116-A (GB)
Title: Improvements in crystal contacts of which one element is silicon
IPC: H01L21/00
Filed: 1941-07-18
Abstract: 578,116. Detectors. GENERAL ELECTRIC CO., Ltd., JONES, D. E., RANSLEY, C. E:, RYDE, J. W., and WILLIAMS, S. V. July 18, 1941, No. 9108. [Class 40 (v)] [Also in Group III] The crystal contact of a detector is formed from substantially pure silicon to which is added about one atomic per cent of magnesium. The silicon is heated in a pure magnesia crucible at a temperature of about 50‹ C. above its melting point in an atmosphere of pure hydrogen. Pieces cut from the cooled melt have a contact surface prepared by polishing with fine emery paper and subsequent etching to improve the ratio of back to forward impedance. Etching with 40 per cent hydrofluoric acid decreases the impedance, while etching with a hot 10 per cent solution of caustic soda causes an increase of impedance. The property of being able to withstand voltage applied across the crystal is increased by controlled oxidation of the surface by heating in an atmosphere of air at about 1050‹ C. for two hours.
Patent GB-526618-A (GB)
Title: Zinc engraving plates
IPC: B41N1/06
Filed: 1939-03-22
Abstract: 526,618. Alloys. EDES MANUFACTURING CO. March 22, 1939, No. 9109. Convention date, July 26, 1938. [Class 82 (i)] Rolled engraving plates are made from zinc alloys consisting of zinc of high purity with 0.1-1.75 per cent. of aluminium and one or more of the following: 0.001-0.035 per cent. of magnesium, 0.002-0.25 per cent. of manganese, and 0.01-0.2 per cent. of copper. The zinc may contain less than 0.01 per cent. of lead, iron and cadmium impurities.
Patent GB-980372-A (GB)
Title: Improvements relating to spring arrangements
IPC: F16F1/18
Filed: 1963-03-07
Abstract: 980,372. Springs. DAIMLER-BENZ A.G. March 7, 1963 [March 20, 1962], No. 9163/63. Heading F2S. A leaf spring arrangement comprises at least one parallel-sided or rhomboidal leaf spring of uniform thickness or of a thickness increasing towards the middle and incorporates, in its middle region, one or two transverse eyes to facilitate connection e.g. to a shaft. As shown in Fig. 1 a parallel-sided leaf spring 1, whose thickness increases from the ends to the middle of the spring, has a transverse eye 6 to facilitate clamping to a member, the ends of the spring being provided with rolled lugs 3 or eyes 4. The spring may be mounted on a pivot pin 14 with an interposed resilient layer 16 and in addition may be held by clamps 15 bearing on resilient layers 16 as shown respectively on the left and right hand halves of Fig. 4 which is a section through a leaf 11 in a twin-spring arrangement 11, 12, Fig. 3. The eyes 17 at each end of the springs receive pivot pins 18, 19 which may have parts 18<SP>1</SP> of enlarged diameter with a transverse bore for attachment to a sprung part or, the latter may be connected through a resilient bearing sleeve 20 to the pin 19. The eyes 6 may be of non-circular cross-section. A leaf spring may also have two eyes equally spaced on either side and adjacent the centre of the leaf.
Patent GB-791813-A (GB)
Title: Improvements in or relating to measurement by optical means
Inventor: LYNCH ARNOLD CHARLES
IPC: G01B11/02
Filed: 1955-03-29
Abstract: 791,813. Measuring dimensions photo-electrically. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 29, 1956 [March 29, 1955], No. 9187/55. Class 40 (3). The dimension of an object to be measured extends transversely to a beam of parallel light in which the object is placed and the time is determined during which narrow bundles of light, selected successively from the beam in the direction of the dimension to be measured, or included in the beam and moved in that direction, are interrupted by the object. In one arrangement, see Figs. 1 and 2, a moving thin band of parallel light is produced by slits 10 in rotatable drum 4 in conjunction with components stationary within the drum, viz. lamp 1, having a filament large enough to fill lens 3 with light passed through a slit in plate 2. The object 5 is placed in aperture 6a, larger in the direction of movement of the light bands than the dimension being measured, of plate 6. Lens 7 and photo-cell 9 complete the arrangement. In an alternative arrangement, see Figs. 3 and 4, rotating disc 17 carries lenses 18, and photo-cell 20 is placed behind slit 19 with an interposed condensing lens if necessary. In both arrangements an auxiliary lens may be placed between the lamp and its associated slit; and the object may be displaced from the aperture in plate 6 (or 16) in the light beam direction and a graticule such as is shown in Fig. 5 used to cover the aperture to provide light pulses which can be counted as a measure of the dimension of the object. A rotating prism may alternatively be used to cause the light bundle to sweep across the object in the direction of the dimension to be measured. The ratio of time taken by the selected narrow light bundle to traverse the parts of the light beam interrupted by the object, to the time taken to traverse the two uninterrupted parts of the beam can be determined from the signals transmitted by the photo-cell; and if the dimensions of the aperture in plate 6 (or 16) are suitably related to the required dimension of the object, the above ratio of times is unity when the measured dimension equals the required dimension. In an apparatus described (see Fig. 6, not shown) for determining the ratio of times, the photo-cell signals after amplification and phase-splitting are applied to a pair of similar pentode valves whose anodes are connected each through a resistance-capacitance smoothing circuit to the grids of two triodes across the cathodes of which is connected an indicating meter from whose reading the dimension being measured can be determined. In a particular embodiment for measuring the diameter of a cable, a drum rotates behind a main aperture itself behind the cable, the drum having horizontal slits in its surface and a photocell, stationary within it.
Patent GB-1270886-A (GB)
Title: Process for the single-bath dyeing of mixtures of polyester and cellulose fibres
IPC: D06P3/54
Filed: 1970-02-26
Abstract: 1,270,886. Dyeing polyester/cellulose mixtures. FARBWERKE HOECHST A.G. 26 Feb., 1970 [26 Feb., 1969], No. 9280/70. Heading D1B. Mixtures of polyester and cellulose fibres are dyed simultaneously with disperse and reactive dyes by the thermosol process the fibre mixture being padded with padding liquors which contain the dyes, alkali and a polyglycol. The heat treatment may be effected by hot air, steam or heated cylinders at 180-230‹C. The polyglycol is preferably polyethylene glycol of MW 200 to 1500 and is used as 5 to 50 gms per litre. The reactive dye may contain a vinylsulphene group or a group which forms a vinylsulphene group in alkali or a # - (2,2,3,3 - tetrafluoro - cyclobutyl) - acryloylamino group which may be substituted in the 4 position by an alkyl group.
Patent GB-1517494-A (GB)
Title: Method for the manufacture of soil modifiers
IPC: C05D9/02
Filed: 1977-03-04
Abstract: 1517494 Ferric oxide-ferric sulphate soil modifiers SOC ITALIANA RESINE SIR SpA 4 March 1977 09327/77 Headings C1A and C1B A soil modifier, consisting of from 80 to 95 weight per cent of a mixture of ferric oxide and ferric sulphate in an oxide to sulphate weight ratio of from 0À25:1 to 1:1, is prepared in a process which comprises an initial step in which the soil modifier is formed by calcining in an oxidizing gas at 500 to 600‹C a blend of (i) the by-product, essentially FeSO 4 , 7H 2 O, obtained in the production of TiO 2  from ilmenite by the sulphate process, with (ii) a material containing at least 80 weight per cent of ferric oxide and ferric sulphate to convert from 80 to 95% by weight of the by-product into ferric oxide and ferric sulphate, wherein the said material is present as at least 20 weight per cent of the blend with respect to the by-product, the production of the soil modifier is continued by continuously feeding the blend to the calcination under the same conditions except that the material added to the byproduct is replaced by a fraction of the discharged soil modifier which is recycled.
Patent GB-432379-A (GB)
Title: Improved method of and means for the combustion of powdered or granulated fuel
IPC: F23C99/00
Filed: 1934-03-24
Abstract: 432,379. Pulverulent-fuel furnaces. WHITEHOUSE, J. M., 13, Alexandra Road, and HADDAN, A. J. H., 11A, St. Andrew's Road, both in Bedford. March 24, 1934, No. 9330. [Class 51 (i)] Pulverulent fuel is fed upwardly from a hopper 13 through a conduit 12 by compressed air admitted thereto from a jacket 12a in the manner described in Specification 413,372, [Group XXX], the air-fuel mixture being deflected downwardly by a cap 8 on to an imperforate hearth 2 where combustion takes place. The cap 8 is supported on the upper end of the extension 5 of the conduit 12 by a ring 11 carrying spacing lugs 11<a>. In the form shown in Fig. 1, the hearth 2 is fixed and slag is removed therefrom by a rotary scraper 16 carried by a casting 18 which surrounds the hearth-supporting tube 4 and is rotated by worm gearing 19..22. The discharged slag is collected in a hopper 25 carried by a sleeve 26 surrounding the casting 18. Fig. 2 shows a modification provided with a rotary hearth 2 and fixed scraper 38, the hearth 2 and cap 8 being both cooled internally, the former by air supplied at 31 and delivered by pipe 39 to the fuel-conduit jacket 12<a>, and the latter by water supplied at 40 and withdrawn through pipes 41, 42. The hearth is rotated by a worm 36 engaging a worm-wheel 35 on the supporting tube 4. In a further construction having an air or water cooled rotary hearth and a fixed scraper, the cap 8 is solid and is vertically adjustable to vary the size of the annular outlet 7.
Patent GB-567894-A (GB)
Title: Improvements in or relating to valves for cisterns and the like
IPC: F16K31/20
Filed: 1944-07-10
Abstract: 567,894. Float valves. SUTTON, C. J. July 10, 1944, No. 9366/43. [Class 135] A float - actuated cistern supply valve has a reciprocating valve guided by a discharge pipe secured to the valve member. As shown ir the Figure, a valve head C coacts with an out wardly bevelled seat E and is carried by a dis charge pipe D provided with inlet ports d<1> and slidably mounted in the casing A. The valve if actuated by an annular float E guided by the discharge pipe and coupled by links G, G<1> and levers H, H<1> to a flange J on the discharge pipe. The inlet is fitted with a flow-regulating device comprising a hollow shell F with a central inlet opening f<1> and a number of spaced outlet openings f<2>.
Patent GB-559242-A (GB)
Title: Improvements in or relating to means for controlling water heating apparatus
IPC: G05D23/08
Filed: 1942-07-07
Abstract: 559,242. Regulating air supply to water heaters. COOKSON, T. H. July 7, 1942, No. 9370. [Class 126] [Also in Group XII] A thermostat 11 subject to the temperature of the water in a water-heating apparatus is connected by a chain 13 to a shutter or damper 14 controlling the bottom draught to the furnace and by a link 19 to an arm 17 on a rod 16 which operates the chimney damper 20 by means of an arm 21 and link 22, the link 19, arm 21, and/or link 22 being fitted with right- and left-hand screw adjusting devices.
Patent GB-1220038-A (GB)
Title: Reduction of iron ores
IPC: C21B13/06
Filed: 1969-02-21
Abstract: 1,220,038. Active carbon. F.M.C. CORP. 21 Feb., 1969 [28 Feb., 1968], No. 9405/69. Heading C1A. [Also in Division C7] Iron and active carbon, which latter may be used for water purification, are prepared by mixing iron ore, in the form of powder or an open-pored easily powdered agglomerate thereof, with at least 25% stoichiometric excess of a powdered char of a coal below the rank of anthracite, which char has a CO 2  reactivity at the reduction temperature of over 10% by wt. per hour and heating the mixture at 1775- 1875‹ F. long enough for substantially complete reduction, the iron being recovered in the same particle size range as the ore used. The ore may be high grade haematite or magnetite ore, the reductant may be a char of a bituminous or lignite coal and the CO 2  reactivity thereof may be raised by addition of a metal salt (e.g. Na 2 CO 3 ) during the production thereof. The heating is preferably carried out in a multiple hearth or travelling grate furnace by means of hot gases passed across the path of the moving mixture and the products may be separated mechanically (e.g. by screening for which process the size of the ore and reductant feeds are preferably different) and then magnetically. The char may preferably be made in a series of fluidized beds. An apparatus for determining the CO 2  reactivity of a char is also disclosed.
Patent GB-591477-A (GB)
Title: Devices for freezing foods
IPC: A23L3/36
Filed: 1945-04-16
Abstract: 591,477. Refrigerators. BURGESS, A. F. (Dole Refrigerating Co.). April 16, 1945, No. 9433, [Class 29] Staggered refrigerating plates 2a, 2e on which food is placed in a cabinet 1 comprise thin metal sheets 3, 4 enclosing a refrigerant coil 5, the plates being hermetically sealed and exhausted so that the sheets make good thermal contact with the coil. Air is circulated over the plates by a fan 22 and refrigerant is supplied to the coils, which' are connected in series, by a refrigerating machine 24. A further plate 2 is arranged under the roof of the cabinet, and a storage space 36 has a plate 2f at its upper part. Access to the cabinet and storage space is had by doors 43, 44. The plates are exhausted through nipples 7 with ball valves, and may be filled with eutectic solution. The cold air may pass from the lowermost shelf 2e to the storage chamber 36 and back to the fan. Angle brackets 39 on the walls of the cabinet support the plates.
Patent GB-203011-A (GB)
Title: An improved stopping and turning signalling system for vehicles
IPC: B60Q1/34
Filed: 1922-04-03
Abstract: 203,011. McElliott, J. P. April 3, 1922. Illuminated stencil and transparency indicators.-In a stopping and turning signalling apparatus for vehicles, of the type in which lamps, mounted in signal boxes, are automatically and d selectively illuminated by the actuation of the brake pedal or steering post, the extremity of each signal box is closed by a lens and a perforated indicator plate spaced at a distance from the lens. The signal unit 7 is divided into compartments, each of which has a lamp 12 and is closed by a transparent lens 10 and a perforated indicator plate 9.
Patent GB-840099-A (GB)
Title: Variable coupling transformer devices
IPC: H01F29/12
Filed: 1958-03-25
Abstract: 840,099. Transformers; selsyn machines. SPERRY RAND CORPORATION. March 25, 1958 [May 13, 1957], No. 9568/58. Classes 35 and 38 (2). A variable-coupling transformer comprises two relatively displaceable members with parallel adjacent plane surfaces having windings so distributed as to produce a concentrated flux pattern printed on their adjacent opposed faces, a small air gap between them, and means for providing a portion of the magnetic flux path with a low reluctance. The displaceable members may be discs 18 and 27 of aluminium, with a very thin dielectric layer 22 and 26 on opposing faces, the windings 23 and 25 being printed thereon e.g. by the photo-etch process. Annular cores 20 and 29 of magnetic material, e.g. a ferrite, reduce the reluctance of the working flux path. Stator current is supplied through leads 60 and 61 and rotor current is brought out through leads 47 and 48 to slip rings 49 and 50. The windings form spirals 40 and 41, the radial elements thereof being spaced to provide a sinusoidal flux pattern of one complete cycle. Further very thin insulating layers having similar windings printed thereon may be superimposed over the first layer of windings and angularly displaced therefrom to provide more than one output so that the device may function as a " resolver " (Fig. 8, not shown). Instead of having magnetic cores the discs themselves may be magnetic; the windings being printed directly thereon (Fig. 7, not shown). An alternative arrangement in which the relative displacement of the members is linear, the windings forming square spirals, is described (Figs. 9 and 10, not shown).
Patent GB-888472-A (GB)
Title: Improvements in motor-driven winch blocks
IPC: B66D3/18
Filed: 1958-03-25
Abstract: 888,472. Pneumatic winches. MAIRE, C. A. March 25, 1958 [March 26, 1957[, No. 9612/58. Addition to 819,512. Class 78 (5). The pneumatically-driven winch as set forth in the parent Specification, is provided with a pulley 6 carried by arm 9 pivoted at 10, whereby the centre may be guided on to the winch drum 2. The winch casing 4 substantially encloses the winch drum to prevent ingress of dust and moisture thereto.
Patent GB-826963-A (GB)
Title: Turbine engine power plant
Inventor: RAINBOW HORACE SINCLAIR
IPC: B64C29/00
Filed: 1956-03-28
Abstract: 826,963. Gas turbine power plant. ARMSTRONG SIDDELEY MOTORS Ltd. March 14, 1957 [March 28, 1956], No. 9642/56. Class 110(3). A power plant including one or more gas turbine engines, the exhaust from which may be diverted from one or more effluent pipes terminating in a propulsive jet nozzle to supply a free power turbine has the effective outlet area of the jet nozzle or nozzles and the effective area of admission to the free power turbine arranged to be varied simultaneously and inversely so that the sum of the two divided mass flows of gas is kept substantially constant. This allows a change-over from maximum free turbine power with zero jet nozzle opening to zero free turbine power with maximum jet nozzle opening to be effected without varying the turbine engine operating conditions. Air compressed in a compressor 12 is fed to one or more combustion chambers 13 supplying gas to a turbine 14 driving the compressor 12. The exhaust from the turbine 14 may pass through a pipe 15 either to a free power turbine 16 which drives a lift fan (not shown) of the aircraft or to a propulsive jet 17 or to perform both of these functions simultaneously. The free power turbine 16 has variable area admission which may be of the kind described in Specification 825,547, in which pivoted nozzle vanes may be moved from the fully open to the fully closed position by a cam-ring 26, Fig. 2, rotatable by a reversible electric motor 27. A bullet 28 is mounted in the exhaust-pipe 15 by struts 29. The exhaust pipe 15 terminates in a circular arrangement of pivoted flaps 30 which may be moved by jacks 39 operated by reversible electric motors 42 from a position in which they define the outer periphery of the maximum area nozzle to a position in which their downstream edges effect a seal with the bullet to close the nozzle. The jacks 39 are connected to the flaps 30 through a ring member 38. Power is supplied to the motors 27, 42 through a control switch 45 and a change-over switch 44. Closing of the switch 45 causes the motors 42 to open the flaps 30 and to close the nozzle vanes 19. Operation of the switch 44 causes this operation to be reversed. The switch 45 can be used to inch the motors 27, 42 to replace the flaps 30 and nozzle vanes 19 in any intermediate position between the fully open and fully closed positions. The flaps 30 and vanes 19 are arranged to move so that the instantaneous sum of the nozzle area and the turbine admission area is kept substantially constant so that the sum of the mass flows is also substantially constant. In a modification, Fig. 4 (not shown), two gas turbine engines supply working fluid to a single free power turbine.
Patent GB-880338-A (GB)
Title: Polymer latex and method for its production
Inventor: VITKUSKE JOHN FRANCIS
IPC: C08F2/22
Filed: 1960-03-18
Abstract: A latex of a polymer of a vinylbenzyl halide may be prepared by dispersion or emulsion polymerization in the presence of a water-soluble peroxide and a water-soluble reducing activator at a temperature which does not exceed 30 DEG C.  The vinylbenzyl halides may be polymerized alone, in admixture, or with monomers such as styrene, acrylonitrile, methyl acrylate or methacrylate, acrylic acid, acrylamide and butadiene, or they may be cross-linked with monomers such as divinyl benzene.  Catalysts specified are K2S2O8, Na2S2O8 (NH4)2S2O8 and H2O2 in conjunction with alkali metal pyrosulphites, sulphites, bisulphites or formaldehyde sulphoxylates and alkyl mercaptans. The emulsifiers specified are of the sulphonate or sulphate type. The examples also illustrate the use of dodecyl mercaptan, deionized water and sodium bicarbonate.  The washing of the product with water or alcohols, or the freeze coagulation or spray drying of the latex, gives a product which may be used as a thickener in aromatic hydrocarbon solvents or in chlorinated solvents such as methylene chloride, e.g. for application as paint removers.