baber/WOPTO huggingface dataset:
Patent GB-621468-A (GB)
Title: Improvements in or relating to process of obtaining riboflavin from a precipitate containing a riboflavin precursor
IPC: A61K31/525
Filed: 1944-12-19
Abstract: Crystalline riboflavin is obtained by treating with a polar solvent a riboflavin precursor present in the precipitate produced by either the action of a chemical reducing agent on a riboflavin-containing solution or of reducing bacteria on a nutrient riboflavin solution, subjecting the resulting solution to oxidizing conditions to form a supersaturated solution of riboflavin and crystallizing the latter from the solution. Specified solvents are water, aliphatic alcohols such as methanol, ethanol and butanol, acetone, the methyl, ethyl, propyl and butyl ethers of ethylene glycol, the methyl and ethyl ethers of diethylene glycol, 2-methyl-2 : 4-pentanediol and aqueous solutions thereof.  The temperature factor is not critical and may range from about 25 DEG  C. to approximately the boiling-point of the particular solvent utilized.  Experiments are described to demonstrate the dissimilar nature of riboflavin and the precursor precipitate, the solubility of riboflavin and the effect of varying the concentration of water on the efficiency of certain solvents.  In practicing the invention, the precipitate containing the riboflavin precursor, either in a wet or dry condition, is placed in an appropriate solvent and the mixture is preferably heated and filtered to isolate riboflavin.  The method of forming the riboflavin precursor which forms the starting material for the present invention is disclosed in Specification 621,469 which deals with the formation by means of the action of reducing bacteria, and in Specification 621,552 which deals with the formation by the action of chemical reducing agents.
Patent GB-1163795-A (GB)
Title: Over-Voltage Protection Circuit
Inventor: MUSHAM JOHN ROBIN
IPC: H02H9/04
Filed: 1967-06-02
Abstract: 1,163,795. Overvoltage protection. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 10 April, 1968 [2 June, 1967], No. 25479/67. Heading H2H. An overvoltage protection arrangement for a load L which may comprise semi-conductor devices comprises a fixed resistor R in series with a non-linear impedance M shunting the load L, a voltage breakdown device T being connected across the resistor R, the characteristic of the impedance M being such that as the voltage thereacross increases the impedance thereof decreases. Thus when the voltage between lines 1, 2 is excessive the voltage across the resistor reaches a value large enough to cause breakdown of the device T. The full-line voltage is then applied to the impedance M which then assumes a low-impedance state such that a lowresistance path is created which absorbs the overvoltage between the lines 1, 2. The device T may be an untriggered thyristor or bi-directional device such as a TRIAC. Alternatively a bridge circuit of thyristors or thyristors and diodes may be used.
Patent GB-502543-A (GB)
Title: Improvements in and connected with the control of atmosphere in furnaces
IPC: C21D1/76
Filed: 1937-09-20
Abstract: 502,543. Furnace atmospheres. CHUBB, W. F. Sept. 20, 1937, No. 25482. [Claes 61 (ii)] In the heat treatment of metals an atmosphere gas is passed through a body of material located within the heat-treating chamber and of such a nature that it will react with moisture or other harmful constituent it may be desired to remove from the gas before it contacts with the metal. Carbon, e.g. in the form of charcoal, and finely divided steel and iron in the form of turnings, borings, &c. are suitable for the removal of moisture. The apparatus shown consists of an open-topped container 1 having a gas supply pipe 5 welded thereto and extending down to the bottom of the container.
Patent GB-865693-A (GB)
Title: Improvements in or relating to means for the removal of solid impurities from liquids by sedimentation
IPC: F01M1/10
Filed: 1958-11-05
Abstract: 865,693. Gravity-separation apparatus. NEWTOWN MOTORS (GREAT YARMOUTH) Ltd., and TOFT, E. July 28, 1959 [Nov. 5, 1958], No. 35534/58. Class 46. [Also in Groups XXII, XXIII and XXVII] A sludge collecting chamber below a sump communicates with the sump whilst the liquid in the latter is at rest, but is automatically cut off from the sump when the liquid is being circulated. The invention is applicable to electroplating liquids, and cutting fluids for machining or wet grinding, but particularly to lubricating oil in internal combustion engines. When liquid in a sump 1 is at rest, a movable obturator plate 6 is positioned by a spring 16 so that slots 9 in it are aligned with slots 3 in a false bottom 1a of the sump overlying a sludge-collecting chamber 4. When the liquid is circulated elsewhere from the sump the plate is slid to the right automatically so that the slot series 9 and 3 are out of alignment to prevent re-suspension of collected sludge. As shown, the moving means consists of a piston assembly 11, 12 operated by liquid from the delivery side of the liquid-circulating pump (not shown). The piston may be operated by suction, or electrical moving means may be employed. In an alternative embodiment the false bottom 1a is dispensed with the obturator being an assembly of pivoted vanes which in the first position are vertical and in the second position are horizontal and over-lapping. If the invention is applied to a cast crankcase sump the obturator means may be in the form of a part-cylindrical member oscillatable to open or close a slot formed by downwardly converging walls of the sump.
Patent GB-1336214-A (GB)
Title: Nonwoven material
IPC: D06M15/244
Filed: 1971-04-19
Abstract: 1336214 Water proofing KIMBERLYOLARK CORP 19 April 1971 [25 March 1970] 25560/71 Heading DIP [Also in Division B5] Single or multiple ply cellulose wadding having a basis weight of at least 9lbs and a burley porosity of at least 1 in the form of a non- woven material is impregnated with an aqueous solution or dispersion of a water-repellant e.g. a fluorochemical, wax dispersion, pyridinium salt or a curable resin. The non-woven material may be in the form of a laminated structure consisting of alternate layers of cellulose wadding and reinforcing material bonded together by an adhesive with a low level of surfactant e.g. PVC in dioctyl phthalate plasticiser. The reinforcing material may be non- woven scrim consisting of crossed over sets of threads bonded at their points of intersection, webs of continuous thermoplastic filaments, drafted webs and carded fibre webs. The reinforcing material may consist of nylon, glass fibres, polypropylene, rayon and cotton.
Patent GB-256220-A (GB)
Abstract: 256,220. Malzacher, W. July 29, 1925, [Convention date]. Cleaning, fluid-pressure processes for. - The outside of a hose-pipe is cleaned by drawing it through an open-ended double-walled cylindrical chamber from which jets of water are directed on to the outside of the hose. The chamber comprises an outer wall 1 with a connection 2 for the water supply and with screw-threads 3 in which engage two end-pieces 4 with apertures 8 for the passage of water and a space 7 between their adjacent ends.
Patent GB-643653-A (GB)
Title: Refractory or abrasive materials and methods for their manufacture
IPC: B24D3/08
Filed: 1946-08-27
Abstract: An abrading material is prepared by subjecting a substance composed of or containing an oxygen-containing compound of silicon to heat treatment in the presence of a reducing metal, particularly aluminium or magnesium, whereby at least a part of the silicon is replaced by an alloy of silicon with the reducing metal, this alloy embedding the grains of the metallic oxide produced by the oxidation of the reducing metal.  The heat treatment is preferably effected by immersing the substance in a bath of molten aluminium or magnesium. The substance may be treated in the form of a shaped object or as a powder such as sand, and powders obtained by treating sand may be agglomerated with silica or an aluminium silicate and used to make grindstones.ALSO:A refractory material is prepared by subjecting a substance composed of or containing an oxygen-containing compound of silicon, such as a silica-containing bauxite or clay, to heat treatment in the presence of a reducing metal, particularly aluminium or magnesium, whereby at least a part of the silicon is replaced by an alloy of silicon with the reducing metal, this alloy embedding the grains of the metallic oxide produced by the oxidation of the reducing metal.  The heat treatment is preferably effected by immersing the substance in a bath of molten aluminium or magnesium. The substance may be treated in the form of a shaped object or a powder.  The product resulting from the heat treatment may be subjected to further treatment for the removal of at least part of the alloy, whereby a porous object is obtained consisting wholly or partly of metallic oxide.
Patent GB-1141213-A (GB)
Title: Process for impregnating red phosphorus with a hydrophobic agent
IPC: C01B25/00
Filed: 1967-06-05
Abstract: 1,141,213. Hydrophobic phosphorus. KNAPSACK A.G. 5 June, 1967 [24 June, 1966], No. 25851/67. Heading C1A. A stabilized hydrophobic red phosphorus is made by treating an aqueous suspension of red phosphorus with Mg(OH) 2  or Al(OH) 3 , precipitated in situ, as stabilizer, immediately treating the stabilized red phosphorus with an aqueous dispersion of a liquid paraffin, a wax, or an organo-silicon compound, containing 0À2% to 5À0% by weight of the hydrophobic or agent, referred to the weight of phosphorus used, filtering the mixture obtained and drying the filter cake, preferably at 100 to 135 C., if desired under reduced pressure, to give a substantially dry product. The hydrophobic agent is one capable of producing stable dispersions in water and stable at pH values of up to 11. If the stabilizing agent is Mg(OH) 2  0À6% by weight calculated as MgO is the preferred amount; if Al(OH) 3 , 1À5- 2À0% by weight is preferred. The preferred amount of a liquid paraffin or a wax is 0À9% to 1À8% by weight; that of an organosilicon compound is 0À6% to 1À2% by weight. The aqueous dispersion of hydrophobic agent preferably contains 30 to 45% by weight of hydrophobic material. The organo-silicon compound may be a silicone, siloxane or silane.
Patent GB-1071384-A (GB)
Title: Method for manufacture of field effect semiconductor devices
IPC: H01L29/78
Filed: 1964-06-23
Abstract: 1,071,384. Semi-conductor devices. HITACHI SEISAKUSHO KABUSHIKI KAISHA. June 23, 1964 [June 24, 1963], No. 25927/64. Heading H1K. The conductance of the channel layer of a field effect semi-conductor device is modified by heat treating the device whilst subjecting the layer to an electric field. As described the device is a field effect transistor having two N-type surface regions 2, 2a formed in a P-type silicon body 1, ohmic source and drain electrodes 5, 6 in these regions and two gate electrodes. The gate electrode 8 is attached to the P-type body 1 and a gate electrode 7, which overlies an N-type channel layer 4 bridging the regions 2 and 2a, is connected to an oxide insulating surface layer 3. In the process, the electrodes 5, 6 and 7 are connected as shown to a potentiometer circuit and on heating the body whilst so connected, the conductivity distribution in channel layer 4 is modified and the extent of this region may also be altered, to produce a device (Fig. 2, not shown) of the form shown in Fig. 4 of Specification 1,071,383. Characteristic curves, Figs. 3 and 5 (not shown), are presented to show that the treated device has superior operating characteristics to an otherwise identical but untreated device.
Patent GB-259996-A (GB)
Title: Improvements in or relating to dynamo electric machines
IPC: H02K23/18
Filed: 1926-10-18
Abstract: 259,996. International General Electric Co., (Assignees of Allgemeine Elektricitõts Ges.). Oct. 16, 1925, [Convention date]. Brush - holders; dynamos, regulating. - Displacement of the brushes for reverse running in small lighting dynamos having one pole " earthed " to the frame is made without disconnecting the brush leads. As shown, a cable connotor band insulating plate care mounted on one side of the bearing shield a, brush-holders e, f and an insulating plate g being mounted on the other side. These parts are connected to the bearing shield by detachable conducting screws i, h engaging holes m<1>, l<1> or n<1>, k<1> and m, or n, k respectively. The head of either one screw or the other is connected to the cable connector b or shield a, depending upon which way the brushes are rocked. The direction of rotation is indicated by arrows p on the plate g.
Patent GB-897503-A (GB)
Title: A dynamo-electric machine rotor
Inventor: HAVELKA KAREL
IPC: H02K3/24
Filed: 1958-08-13
Abstract: 897,503. Cooling and securing dynamoelectric machine rotor coils. ZAVODY V.I. LENINA PLZEN, NARODNI PODNIK. Aug. 13, 1958, No. 26019/58. Class 35. On a dynamo-electric machine rotor having arranged on a body, not shown, a plurality of salient poles, each carrying a respective field coil 2 whose length in the direction of the rotor axis exceeds its width circumferentially of the rotor, there is positioned between the coils of each pair of adjacent poles a baffle 1 which is parallel to the rotor axis, symmetrical about a radial plane passing midway between adjacent poles, and has side walls converging towards each other at their radially inner edges at a greater rate than do the surfaces of the coils so as to form with the coils radially outwardly converging ducts through which flows a cooling medium stream. The baffle may comprise two flat sheets or a V- or a U- shaped sheet, Fig. 2, and may have axiallyextending ends 4, Fig. 9, bent toward the direction of rotation to scoop air into the ducts, and it may be combined with spacers 5, Fig. 11, which maintain the coils in their proper place. The baffle may be of metal, of an electrically insulating or a non-magnetic material, or of metal with an electrically-insulating layer. Reference has been directed by the Comptroller to Specification 845,750.
Patent GB-158531-A (GB)
Title: Improvements in process of dyeing
IPC: D06P3/60
Filed: 1920-09-10
Abstract: Cotton goods containing motes, shives, or leaf, are first dyed and then submitted to the action of an alkaline oxidizing-agent, preferably added to the same bath, to destroy the impurities. Suitable alkaline oxidizing-agents are mixtures of soda ash, caustic soda, sodium silicate or phosphate, with sodium peroxide, p percarbonate, perborate, persulphate, or persilicate, or hydrogen peroxide; or sodium peroxide may be used alone.  The substantive dyes, or mixtures thereof with vegetable dyes, are suitable. Specification 103,445 is referred to.ALSO:Cotton goods containing motes, shives, or leaf, are first dyed and then submitted to the action of an alkaline oxidizing-agent, preferably added to the same bath, to destroy the impurities. Suitable alkaline oxidizing-agents are mixtures of soda ash, caustic soda, sodium silicate or phosphate, with sodium peroxide, percarbonate, perborate, persulphate, or persilicate, or hydrogen peroxide; or sodium peroxide may be used alone.  The substantive dyes, or mixtures thereof with vegetable dyes, are suitable. Specification 103,445 is referred to.
Patent GB-1420508-A (GB)
Title: Roof and wall consstruction
IPC: E04B1/35
Filed: 1973-05-31
Abstract: 1420508 Method of constructing roofs or walls S A H ISSA and A A E ALMANAI 31 May 1973 [2 June 1972] 26110/73 Heading E1S A roof, e.g. of dome-like form, or a wall, e.g. of a cooling tower, is made up of interconnected shell elements 14, and is constructed by a method comprising arranging shell elements in a course beneath a previously-erected part 30 of the structure, raising the elements by one edge to the level of the upper edge of the previously-erected part, by means of a multiple hoist/device 6 having cables 9 connected to the respective elements, pivotally attaching the elements to the upper edge of the previouslyerected part, further raising the elements to pivot them about that upper edge into their final positions, and securing the elements; this course then forms the previously-erected part for attachment of the next course in the same way. Adjacent shell elements in a course are connected by interengaging frusto-conical projections 16 and recesses 17. Shell elements are pivotally connected to the previous course by hooks 20 engaging pins 21, and after pivoting up the elements they interengage with the previous course by hemispherical projections 18 and recesses 19. The hoist device includes individual capstans 8 driven through gearing, with the cables 9 passing round pulleys 10, 11, 13, of which the upper pulleys 13 are detachably mounted on the elements of the previous course.
Patent GB-188482-A (GB)
Title: Improvements in detachable buttons
IPC: A44B1/34
Filed: 1921-10-03
Abstract: 188,482. Mendler, C. Oct. 3, 1921. Buttons and button-fasteners; studs.-Relates to means for securing buttons, particularly lapel buttons, in which the shank 22 of a button after insertion through the fabric, is passed through a central aperture 8 in the gripping member 1, which frictionally engages the shank, and consists in making the central portion of the member 1 offset from the plane of the rim 3 and forming it into two. gripping portions 4 by cutting along diagonal lines 6 tangential to the aperture 8, the offset portion being severed from the rim 3 for the greater part of its circumference leaving attaching-strips 9. Extensions 11 on the portions 4 provide means by which the gripping elements can be sprung outwardly to release the shank. A backing element 2 is secured to the member 1 by crimping the flange 16 of the ring 14 over the rim 3, a band 17 with aperture 19 extending between opposite sides of the ring 14.
Patent GB-773642-A (GB)
Title: Pressure regulating device for a fluid pressure distribution system, particularly for brakes
IPC: G05D16/10
Filed: 1955-09-13
Abstract: 773,642. Hydraulic brakes. TEVES, H., and TEVES, E. A., [trading as TEVES MASCHINEN - UND ARMATURENFABRIK KOMM-GES., A.]. Sept. 13, 1955 [Oct. 2, 1954], No. 26232/55. Class 103 (1). A pressure regulating device is inserted in the conduit of an hydraulic braking system so that the pressure output from the master cylinder 27 is divided between the two branch conduits 3 and 4 in such a way that the pressure in one conduit is increased and in the other reduced, and so that the sum of the pressures in the two pipes rises linearly in proportion to the output from the master cylinder. The characterization is obtained by the use of a control device, as shown in Fig. 1, wherein the supply pressure 2 acts against the pistons 5 and 15 having ports therein controlled by ball valves 9 and 19. The piston 5 bears against a spring 6 which requires a greater than linearly increasing force to compress it while the spring 13 tending to open ball valve 9 is of linear force compression type. Piston 15 on the other hand bears against a spring 16 of linear force-compression type the ball valve 19 being acted upon by a non-linearly increasing force to compress it. By a suitable choice of springs it is possible to obtain the characteristics outlined above such that the mean of the two branch pressures, shown in thick lines in Fig. 2c is linear.
Patent GB-1273680-A (GB)
Title: Apparatus to produce an intermittent conveying motion
IPC: F16H35/16
Filed: 1970-06-01
Abstract: 1,273,680. Railway systems; chain drives. MASCHINENFABRIK SACK G.m.b.H. 1 June, 1970 [13 June, 1969], No. 26264/70. Heading B7L. [Also in Divisions C1, F2 and F3-F4] Movement through a continuous furnace of glass sheets 10 suspended by tongs 11 from a carriage 12 is varied smoothly and controlled by a reciprocating carriage 14 attached to an endless sprocket chain 15 driven by electric motor 24 through an infinitely variable gear-box 23 and a transmission incorporating a crank 21 with means for varying the speed of said carriage according to a desired pattern. The chain 15 is driven by a sprocket 17 on a shaft 18 which also carries a pinion 19 rotated by teeth 34 on a rod 20 reciprocated by said crank 21. The latter is driven by a worm gear 22 connected to the gearbox 23 and its speed is controlled by a cam 25 mounted on the crankshaft and engaged by a roller 29 on a pivoted lever 26 tensioned by a spring 30 against the cam and connected by a variable linkage 27 to a control arm 28 of said gear-box 23. The length of the propelling stroke of the carriage 14 may be contorlled by adjustment of telescopic sections 32 and 33 of the crank 21. The speed of the carriage 14 at any particular point is thus controlled by the cam 25 which may comprise a flexible steel band shaped by a series of radially disposed adjusting screws (Figs. 4 and 5). The apparatus may also be applied to vertical movement of the glass sheets into or out of the furnace.
Patent GB-321010-A (GB)
Title: Improved means for delivering gases at measured rates
IPC: G01P5/00
Filed: 1928-09-13
Abstract: 321,010. Howles, F. Sept. 13, 1928. Liquids, treating with gases.-An apparatus for ascertaining the rate of flow of gas suitable for use in controlling the flow of chlorine for the purification of water comprises a nozzle a, Fig. 1, delivering the gas into a tube b so as to lift in a manner similar to an air lift pump a liquid such as sulphuric acid from a vessel c into a transparent vessel d. The gas and liquid separate in the vessel d, the gas passing off through apertures h to the delivery pipe j and the liquid syphoning back through a pipe e into the vessel c as often as a certain level is reached in the vessel d. The frequency of the syphoning operation indicates the rate of gas flow and by varing the gas inlet pressure the rate of flow can be adjusted. The syphon tube e is provided at the entrance to its divergent discharge portion f with a small air-hole g which ensures the complete removal of liquid from the tube. Fig. 3 shows an apparatus in which the gas supplied through a tube a is completely absorbed partly by the liquid in passing up the tube b to the syphon vessel d and the remainder in a chamber to whict the gas it led from the vessel d. Liquid tc dissolve the gas is sprayed through a nozzle n onto a disc o in the chamber m and is conveyed through a pipe p to the vessel c which is connected to the vessel d by a syphon tube e. The liquid leaves the vessel c by a pipe q. A tube r connected to the atmosphere prevents a reduction of pressure in the vessel c.