baber/WOPTO huggingface dataset:
Patent GB-1070992-A (GB)
Title: Manufacture of hydrogen peroxide
IPC: C01B15/03
Filed: 1965-03-10
Abstract: 2-Ethylhexanoic acid, tertiary mono-carboxylic acid "Versatic" 911 (Registered Trade Mark) and naphthenic acid are regenerated from solutions of their calcium salt in an organic solvent by shaking with an aqueous inorganic acid or by bubbling CO2 or SO2 into a two-phase mixture with water.ALSO:Aqueous hydrogen peroxide is prepared by contacting an alkaline earth metal peroxide in the presence of water with a water-immiscible organic solvent and an organic acid which is substantially insoluble in water and substantially inert towards peroxide and which forms with the metal of the peroxide a derivative substantially insoluble in water and soluble in the organic solvent, and thereafter separating the aqueous phase, which contains the hydrogen peroxide.  The water-immiscible solvent may be subsequently contacted with an aqueous solution of an inorganic acid, to regenerate the organic acid, which may be recycled, and the metal extracted as a water-soluble salt.  The metal salt may be used in the form of a slurry; exemplified are calcium peroxide octahydrate, calcium peroxide dihydrate, anhydrous calcium peroxide, and anhydrous barium peroxide. Suitable acids are branched chain organic acids containing at least eight carbon atoms and which are substantially water-insoluble and may be aliphatic or aromatic carboxylic, phosphoric and sulphonic acids.  Exemplified are naphthenic acid, di-(2-ethylhexyl)phosphoric acid, 2-ethylhexanoic and tertiary monocarboxylic acids with nine to eleven carbon atoms known as "Versatic" 911 ("Versatic" is a Registered Trade Mark), and may be used as 10-50% by weight solution in the organic solvent. Suitable solvents contain 6 or more carbon atoms such as xylene, toluene, n-hexane, cyclohexane and kerosene or mixtures of these. Alcohols containing at least 6 carbon atoms such as n-hexanol may also be used.  The extraction may be at room-temperature and the organic solvent may be further extracted with water which latter extract is added to the first aqueous extract.  The aqueous acid extraction may employ sulphuric acid, sulphurous acid, phosphoric acid, hydrochloric and nitric acid.  Carbon dioxide may be used and the metal carbonate calcined to produce carbon dioxide which may be re-used.  The extractions may be in countercurrent extraction apparatus or in mixing-settling tanks.
Patent GB-569420-A (GB)
Title: Tubular air or gas heater
IPC: F28D7/08
Filed: 1943-06-28
Abstract: 569,420. Tubular air and gas heaters; steam generators. AKT.-GES. FUR TECHNISCHE STUDIEN. June 28, 1943, No. 10431. Convention date, July 6, 1942. [Classes 64 (i) and 123 (ii)] In an air or gas heater for use particularly in thermal power plants, the air, &c., tubes 4 are arranged vertically between inlet and outlet headers 3, 5 around the combustion chamber 1 of the heater with the parts of the tubes in the immediate vicinity of the heater fire protected by water-circulating tubes 10, which form part of a hot water or steam generating system including a boiler 11. Air is supplied to the inlet header 3 through a pipe 2 and leaves the outlet header 5 by a pipe 6. Some of the air, however, may be directed through a heat-exchange tube 8 disposed within the flue of the combustion chamber, and said flue may also locate a superheater 15 through which steam from the outlet 14 of the boiler 11 is adapted to flow.
Patent GB-1085346-A (GB)
Title: A pulley
IPC: B66D3/04
Filed: 1965-03-11
Abstract: 1,085,346. Rope gearing. C. O. H. WALLIN. March 11, 1965 [March 11, 1964], No. 10433/65. Heading F2Q. A rope pulley is of V-section and on the inner flank surfaces tapering grooves 4 of arcuate cross-section are formed which are angularly spaced to conform with the pitch and surface contour of an associated rope 7. The grooves may radiate from the pulley centre or they may be tangential with a hub portion. The grooves on one flank-surface preferably are angularly displaced with respect to those on the other, and one pulley half may be secured to a shaft and the other freely rotatable with respect thereto. A stripper 16, Fig. 5, and a pin 15, for forcing the rope on to the pulley, may be provided.
Patent GB-473296-A (GB)
Title: Improvements relating to suction operated wind screen wipers for motor vehicles
IPC: B60S1/06
Filed: 1936-04-09
Abstract: 473,296. Windscreen-cleaners. LUCAS, Ltd., J., and LUCAS, O. April 9, 1936, No. 1479. [Class 138 (i)] [Also in Group XXVI] Suction-operated mechanism for actuating a windscreen-cleaner of a motor vehicle comprises a valve adapted to regulate the rate of operation of the cleaner when moved from one to another of at least two predetermined positions. When moved to a third position the valve is adapted to bring the wiper arm to rest in an unobstructive position. As shown, the suction motor comprises a cylinder a containing pistons b connected by a rack-bar c which engages a toothed pinion j mounted on the rock-shaft i of the wiper. The opposite ends of the cylinder are adapted to communicate through pipes g with a valve chest d which is provided with a pipe e communicating with a source of suction. The connections of the pipes g to suction are under the control of an oscillatory valve h. The valve for regulat. ing the rate of operation of the cleaner comprises a rotary disc r carried by a spindle s, the disc being formed with arcuate grooves 2, 3. The disc is spring-pressed against the wall of the valve chest which is also formed with arcuate grooves 4, 5, 6 and with ports 7 .... 11. The ports 7, 8 lead to pipe e connected to the source of suction ; the port 9 communicates with the pipe g leading to the right-hand side of the cylinder, and the ports 10, 11 extend through the chest d. The ports 10, 11 are adapted to be covered by a recessed part of the valve h which may also be adapted to cover a port 14 communicating with the left-hand pipe g. The port 7 is smaller than the port 8. With the valve r in the position shown in Fig. 1, both ports 7, 8 communicate with the source of suction and the pistons are adapted to reciprocate quickly within the cylinder a. When the valve r is moved to the position shown in Fig. 2, only the port 7 communicates with the source of suction so that the motor operates at reduced speed. The valve in a third position (not shown) places the right-hand side of the cylinder always open to suction irrespective of the position of the valve so that the cleaner comes to rest with the wiper arm in an unobstructive position.
Patent GB-550811-A (GB)
Title: Improvements in lathes and similar machine tools
IPC: B23Q1/01
Filed: 1941-08-21
Abstract: 550,811. Turning. NICHOLSON, V. R. Aug. 21, 1941, No. 10650. [Class 83 (iii)] A lathe or like machine tool has a pillar headstock A carrying the spindle B and secured to a bed E which extends over the spindle without being additionally supported from the ground and which supports one or more tool saddles F, F<SP>1</SP>, fitted with tool or turret-carrying cross slides G, G<SP>1</SP>. A tailstock may also be supported on the bed. In some cases an outboard steady, Fig. 1, may be provided. The construction allows swarf to fall clear of the machine without interference.
Patent GB-1109469-A (GB)
Title: A spark generator
IPC: H01T2/02
Filed: 1966-03-10
Abstract: 1,109,469. Spark gaps. COMPAGNIE GENERALE D'ELECTRICITE. 10 March, 1966 [12 March, 1965], No. 10665/66. Headings H1D and H1X. One of the electrodes of an enclosed or unenclosed spark-gap is of inductive form, includes an auxiliary spark-gap, and is magnetically coupled with an inductor connected to a source of triggering pulses. The auxiliary spark gap is formed by a gap between two parts of the electrode. The two parts may consist of a helically coiled portion 24, Fig. 2, having one end attached to the electrode stem 22 and its free end 25 spaced from the free end 23 of the other part 21 which extends axially from the electrode stem. Alternatively, the first part may be in the form of a planar spiral (Fig. 4, not shown) or a single ring (Fig. 5, not shown) interrupted by a gap, the latter forming the triggering gap, and the peripheral edge of the ring constituting the electrode surface for the main gap. The looped part of the electrode may be embedded in a mass of fibre-glass, Fig. 3, and the main electrode stem may have a core of ferrite 28 and a longitudinal slot 27 to reduce eddy currents. The coil for providing the triggering magnetic field may be incorporated in an end wall of an enclosure for the generator, or in the lateral wall if both main electrodes incorporate an auxiliary gap.
Patent GB-106910-A (GB)
IPC: C10B43/10
Abstract: 106,910. Bark, W. T. Aug. 21, 1916. Retort and like doors.-The door b* is provided with a valved opening b<1> for the supplying air to burn off deposits formed on the walls of a retort. The door may be fitted with lugs b<4>, Fig. 3, by which it is hung on ears on the retort and is secured by the bar b'. It is provided with a sight hole b<3>. Instead of a valved opening a part of the door may be cut away.
Patent GB-1402317-A (GB)
Title: Machine for surface treatment of concrete panels
IPC: B28B11/08
Filed: 1972-07-08
Abstract: 1402317 Concrete smoothing machines LARSEN & NEILSEN CONSULTOR A'S 8 July 1972 10702/72 Heading E1G [Also in Division B5] A concrete slab 1 cast between side forms 3 is smoothed by the lower runs of oppositely-moving transverse bands 7, 8 extending between driving rollers 9 on a travelling frame 13-14 running on side rails 5, the lower band runs being engaged by overlying height-adjustable pressure plates 11. As shown for casting a panel the side forms 2 are connected by a bottom form 2 carrying vibrators 6. The pressure plates 11 also carry vibrators 12, and each lower belt run is transversely curved under its pressure plate between underlying edge guide rails, Fig. 3 (not shown). The smoothing band rollers 9 are mounted in a height-adjustable sub-frame 22, and each side frame member 14 is in two height-adjustable parts. The machine may have a vibratory feed hopper 16, Fig. 2, supplying surface rendering or surface-drying material through an adjustable discharge slot, possibly associated with a distributing worm and possibly controlled by an electronic depth feeler. The smoothed surface may be finally glazed by one or more height-adjustable steel plates 19 suspended across the machine - e.g. on weighted parallelogram linkages not shown. It is stated that the bands 7, 8 may be adjustalbly inclined to the direction of travel, using cranks to swing the bands and pressure plates about a vertical axis at one side of the machine, and that the machine may advance in steps related to the band width, with intermittent lifting of the bands.
Patent GB-399862-A (GB)
Title: Improvements in air pre-heaters for furnaces and similar heatexchanging devices
IPC: F23M20/00
Filed: 1932-04-14
Abstract: 399,862. Heating air. UNDERFEED STOKER CO., Ltd., HARLOW, W. F., and BINGHAM, A. E., Aldwych House, Aldwych, London. April 14, 1932, No. 10714. [Class 64 (i).] In a heat-exchanger such as a recuperative air-heater for a furnace in which some of the heated air is led back to the cold air inlet A, the re-circulated air is led from the hot air outlet C through passage D to an additional heater or heaters F and thence through passage G to fan chamber I which supplies air to inlet A. The flap valve J which controls the flow is disposed so that the sum of the quantities of cold air and already heated air admitted to the fan are the same although the proportions can be altered.
Patent GB-539214-A (GB)
Title: Improvements in or relating to measuring gauges
IPC: G01B5/08
Filed: 1940-06-22
Abstract: 539,214. Linear-dimension gauges. BOOTH, L. B., and BOOTH, M. B. June 22, 1940, No. 10739. [Class 106 (ii)] [Also in Group XXII] Plug and ring gauges of the type in which the leading or receiving end is provided with a pilot b having a maximum diameter equal to that of the gauge a are also provided with a groove c in the end into which a tool may be introduced while the gauge is rotated to rectify wear. The groove may be formed in the periphery in the case of a ring gauge. The pilot is thus expanded to dimension and reground to size.
Patent GB-309996-A (GB)
Title: Feed water supply apparatus for high pressure steam boilers
IPC: F22D3/00
Filed: 1929-04-08
Abstract: 309,996. Friedmann, L., Friedmann, M., and Schopp, N., (trading as Friedmann, A., [Firm of]). April 19, 1928, [Convention date]. Drawings to Specification. Feedwater, supplying. - In gravity-feed apparatus comprising two chambers which are alternately filled with feedwater at a pressure below the boiler pressure, and which are then placed in turn in communication with the boiler steam space to allow the water to flow into the boiler, the chambers are provided with pressure controlling devices which prevent the pressure from being raised at the same time in both containers beyond that of the supply to the containers from the feed pump or injector. The supply and discharge of boiler steam to and from the chambers are controlled by compound valves, and the water in each container is allowed to flow over into an auxiliary container after a certain pressure is reached, as described in Specification 309,995. An auxiliary container may be formed by dividing a main container by a transverse partition having an opening at the top and a non-return valve at the bottom.
Patent GB-695947-A (GB)
Title: Improvements in and relating to the production of xylenes
IPC: C07C5/27
Filed: 1949-04-25
Abstract: p-Xylene is continuously produced by feeding a xylene mixture containing it to a cooling zone together with an isomerizate as hereinafter defined, p-xylene separating as crystals on cooling and being removed, the remaining material then being contacted in vapour phase with an isomerization catalyst to obtain the said isomerizate. Preferably, part of the vapour is purged prior to the isomerization zone, and the isomerizate is fractionated to remove benzene and toluene, and to separate xylenes which are passed to the cooling zone.  The feed is preferably maintained at substantially constant composition with a total xylene content of 30-70 per cent.  p-Xylene is preferably separated by freezing out p  at -75 DEG  C. or less. The use as diluent of a component of the feed or product of the isomerization is advantageous.  Ethylbenzene may be used, as described in Specification 687,405, [Group III], or toluene or trimethylbenzenes up to 200 per cent of the total xylenes. Isomerization may be effected with alumina-silica gel or alumina treated with fluorine or its compounds, at 400-500 DEG  C. Other catalysts include products of contacting metal oxides with interhalogen compounds, fluorine or its compounds, as in Specifications 666,812, 666,927, 669,160, 676,801, 680,122, and 680,138.  The alkali content should be less than 0.1, preferably less than 0.01 per cent.  The catalyst may move counter-current to the ascending vapours.  Cooling is preferably conducted in a series of vessels, pentane being a suitable coolant, the temperature difference between the liquid and cooling surface not exceeding 5 DEG  C., and the minimum temperature being above that at which eutectic separates.
Patent GB-1088113-A (GB)
Title: Cyclohexanol derivatives
Inventor: NAUTA WIJBE THOMAS
IPC: C07D295/088
Filed: 1965-03-15
Abstract: The invention comprises compounds of formula <FORM:1088113/C2/1> wherein R1 and R2 are C1- 6 alkyl groups and R3 is a hydrogen atom or a C1- 6 alkyl group, salts thereof, and their preparation by reaction of a 2-R1-cyclohexanone with a compound of formula <FORM:1088113/C2/2> wherein M is an alkali metal atom or a group -Me-Hal wherein Me is a bivalent metal atom and Hal is a halogen atom, and hydrolysing the metal complex formed.  2 - Isopropyl - and t - butyl - cyclohexanones are prepared by hydrogenation of 2-isopropyl-or 2-t-butyl-phenol to give 2-isopropyl- or 2-t-butyl-cyclohexanol, and oxidizing this with potassium bichromate. The compounds of the invention have coronary vasodilatant, sedative, hypnotic and musclerelaxant activity and may be used in pharmaceutical compositions in combination with a carrier, for example in forms suitable for oral, parenteral or rectal administration.
Patent GB-673365-A (GB)
Title: Improvements in the stabilization of microwave oscillators
IPC: H03L7/26
Filed: 1949-04-25
Abstract: 673,365. Automatic frequency control systems. RADIO CORPORATION OF AMERICA. April 25, 1949 [Sept. 18, 1948], No. 10927/49. Class 38 (iv). A microwave oscillator frequency is stabilized by beating a portion of the frequency output with one or a pair of modulating frequencies to produce side-band frequencies lying on opposite flanks of a highly selective absorption/frequency curve, or identical pair of such curves, produced by one or a pair of gaseous cells and by deriving from the relative variation in amplitude or phase of the side-bands transmitted through and acted on by the cells as the oscillator frequency varies a D.C. voltage correcting frequency drift. In Fig. 1, two modulators 12A, 12B, and gas cells 15A, 15B, are used and drift of oscillator frequency differentially alters the amplitude of one at least of the side-band frequencies in each of waveguide or coaxial line channels A and B, the outputs of which are fed by oppositely-poled rectifiers 17A, 17B to, and differentially combined in, a comparison network 18M. Attenuators 14 and matching transformers 13, 16 prevent back coupling of the channels. Alternatively the oscillator frequency and a low modulating frequency may be applied to a balanced modulator 11, Fig. 6 (not shown) and the side-bands passed through a single gas cell, then beat down to low frequencies by a, common oscillator 23, finally being separated by filters 35 and passed to comparison circuit 18. Alternatively a single modulating frequency applied to two limbs of a balanced " magic T," symmetrically with respect to the oscillator frequency applied to another limb may be used, the gas cell being then positioned in a fourth output limb. If phase difference detection is used one channel, say B, is transposed in frequency to that of A by beating its frequency with the difference in frequency of the two channels, Figs. 3 and 5 (not shown), derived preferably from the two modulators, or if two side-bands are produced by a single modulator, Fig. 6 (not shown), by beating one with twice the modulator frequency. The carrier frequency to be controlled may lie inside or outside the frequency interval of the gas line. In the former case two side-bands may be influenced by the gas cells in each of channels A and B; in the latter case one side-band only is used in the channels A and B. It is shown that after passing the side-bands through a gas cell and then demodulating the resultant with the original carrier frequency modulation frequencies are obtained, each with an angular phase shift, which vary differentially with drift of oscillator frequency. One modulation output is converted to alternate positive and negative pulses and applied to a combining and phase difference detecting rectifier bridge circuit, Fig. 4 (not shown), along with the output of the other channel previously converted into a reference saw-tooth wave, so that a D.C. control voltage is derived.
Patent GB-1361405-A (GB)
Title: Means for controlling fluid flow
IPC: F16K7/06
Filed: 1971-04-23
Abstract: 1361405 Administering parenteral fluids E W CLARKE 10 Sept 1971 [11 Sept 1970 23 April 1971] 43513/70 and 10934/71 Heading A5R [Also in Divisions B5 E2 and F2] A medical administration set comprises a tube 1 carrying a hollow needle 2 for inserting through a membrane (not shown) of an inverted reservoir, an air venting branch 3, a litter bag 4, a transparent drip chamber 5 and an outlet tube 6 fitted with a clamp 7 (see Division F2).
Patent GB-1495577-A (GB)
Title: Spark erosion machine
IPC: B23H7/06
Filed: 1975-03-17
Abstract: 1495577 Spark erosion AEG-ELOTHERM GmbH 17 March 1975 [21 March 1974] 11069/75 Heading B3V [Also in Division G3] A spark erosion machine for machining a conical opening in a metal workpiece comprises a wire electrode 14 suspended between guide elements 2, 3 provided on a carrier member 10 which is pivotable about two horizontal axes 7, 9 contained in a plane between the guide elements 2, 3; and an eccentric drive 16 for moving the guide elements 2, 3 so as to change the orientation of the electrode 14, the drive 16 being controllable by a feed means for relatively moving the electrode 14 and a worktable positioned between the guide elements 2, 3. The guide elements 2, 3 are provided on a E-shaped member 10 which is pivotally connected at 9 to a L-shaped member 8 which is in turn pivotally connected at 7 to a F-shaped member 4. The members 4, 10 are connected together by an eccentric drive 16 consisting of a shaft 17 rotatably mounted in the member 4 and a shaft 23 rotatably mounted in the member 10 and integral with a block 22 slidable in a part 19 which is integral with the shaft 17. A change in the feed direction of a worktable (36) (Fig. 3,, not shown) which is moved under the control of an optical reading head (37), causes a pinion 18 on the shaft 17 to be rotated by a motor (41) resulting in a change in the orientation of the electrode wire 14. When the pinion 18 is rotated, the electrode 14 describes a double cone having its vertex at the intersection of the two axes 7, 9. The eccentricity of the drive 16 can be varied by adjustment of a screw 24.
Patent GB-126628-A (GB)
Title: Improved Process for the Conjoint Manufacture of Zinc Sulphide and Barium Sulphate.
Inventor: DESACHY PAUL
IPC: C09C1/06
Filed: 1919-05-05
Abstract: 126,628. Desachy, P. Oct. 19, 1917, [Convention date]. Pigments.-A process for the manufacture of a pigment comprising the sulphate of a metal of the alkaline earths and zinc sulphide utilizes the process described in Specification 126,625, [Class 1 (iii), Oxides &c., Metallic], of producing zinc sulphide alone by causing a hot solution of sodium sulphide to react on an insoluble zinc product such as the oxide, carbonate, sulphite, &c. In preparing a mixture of barium sulphate and zinc sulphide, for instance, a mixed precipitate of barium sulphate and hydrated oxide, carbonate, or sulphite of zinc is first produced by treating a zinc sulphate solution with barium hydroxide, carbonate, or sulphite. The oxide or insoluble salt of zinc in the mixed precipitate is then converted into zinc sulphide by adding a hot solution of sodium sulphide or barium sulphide. The resulting mixture of barium sulphate and zinc sulphide is finally filtered, washed, calcined in a closed vessel with a small quantity of sulphur, and allowed to cool with the exclusion of air.