baber/WOPTO huggingface dataset:
Patent GB-407963-A (GB)
Title: A process for concentrating all kinds of precious metal ores by frothflotation
IPC: B03D1/002
Filed: 1932-09-23
Abstract: Precious metals or their minerals such as tellurides, selenides &c. are concentrated by flotation in a pulp containing a small amount of one or more of the sulphides or sulpho-salts or mixtures of sulphides and sulpho-salts of lead, mercury, silver, and p  copper, a portion of each sulphide or sulpho-salt being initially present in or added to the pulp in granular or crystalline condition and another portion being added to or generated in the pulp in highly divided or colloidal condition.  The term "sulpho-salt" is used to define a compound of the metal with sulphur and arsenic or antimony. Naturally occurring sulphides may be used, reduced by disintegration to a mixture of crystalline and colloidal particles, or the mixture may be produced artificially by slow precipitation of the sulphide from a soluble salt such as the acetate with sulphuretted hydrogen or an alkali sulphide.  The mixture may be produced in the pulp by adding a soluble salt of the metal and precipitating with sulphuretted hydrogen, artificially prepared or natural sulphide in a crystalline condition being added separately if necessary, if not initially present in the pulp.  If pyrites is present in the ore, this may either be floated with the precious metal or may be depressed, e.g. with potassium cyanide.  In the flotation process the pulp may be slightly alkaline, xanthate may be used as a collecting agent and aerofloat or cresol as frothing agent.  It is stated that the sulphides, when present as a mixture of crystalline and colloidal particles, form linked compounds by adsorption with the precious metals or their minerals.
Patent GB-604774-A (GB)
Title: Improvements relating to synchronous alternators
IPC: H02J3/38
Filed: 1945-10-12
Abstract: 604,774. Alternators. MAcFARLANE ENGINEERING CO., Ltd., MAcFARLANE, J. C., and MAcFARLANE, W. I. Oct. 12, 1945, Nos. 26796 and 35135. [Classes 35 and 38 (iv)] Running generators in parallel.-An alternator has a distributed, polyphase type exciting winding energized from a quick response D.C. generator itself excited in proportion to the alternator output. In the form shown, each alternator has a primary winding 20 and an exciting winding 21 fed by an exciter 23 having field windings 26 energized from the main machine output through rectifiers 25 and a non-linear resistance 28. The exciters may be of the type described in Specifications 566,168 or 593,817 and their compensating windings 24 may be connected in parallel by leads 30. One of these leads may include an inductive or non- inductive resistance. The invention is applicable to a single machine.
Patent GB-225205-A (GB)
Title: Improvements in or relating to discharge devices for shaft furnaces working with compressed air
IPC: F27B1/21
Filed: 1924-11-11
Abstract: 225,205. Buhler Geb. Nov. 20, 1923, [Convention date]. Void [Published under Sect. 91 of the Act] Discharging. - In a discharge device for shaft furnaces &c. of the kind comprising a shoot with a pair of valves d, e, which are operated alternatively to prevent the escape of gases, the feed of material from the furnace to the shoot is controlled, for example, by an oscillating gate c. The movements of the gate are so timed that the feed is interrupted during the closing of the valve d.
Patent GB-483006-A (GB)
Title: Process for the manufacture of rubber, rubber substitutes and like elastic masses or intermediate products
IPC: C08K5/01
Filed: 1936-10-05
Abstract: The slightly unsaturated hydrocarbons soluble in concentrated sulphuric acid and obtainable from the acid sludge of the mineral oil industry are used as filler or plasticizer in the manufacture or regeneration of rubber, rubber substitutes or like elastic masses. The mixtures may be vulcanized.  In examples the hydrocarbons are worked up with (1) rubber or (2) smoked rubber, vulcanization accelerator, sulphur, stearic acid, chalk and zinc oxide.
Patent GB-463479-A (GB)
Title: Method for removing liquid from thixotropes or masses of like nature
IPC: B01D37/00
Filed: 1935-09-30
Abstract: Liquid is removed from thixotropes or masses of like nature in a filter in which the filtering surfaces are caused to oscillate rapidly.  The filter surfaces may comprise filter papers, cloths, woven wire, porous rubber, or ceramic masses.  The oscillations may have an amplitude of several millimetres, a frequency of several thousand a minute, and may be produced mechanically.  The masses include viscous sludges and stiff dispersions of dyestuffs or dyestuff intermediates.
Patent GB-221677-A (GB)
Title: Improvements in and relating to milking machines
IPC: A01J5/10
Filed: 1923-10-30
Abstract: 221,677. Marks, E. C. R., (Burton Page Co.). Oct. 30, 1923. Lids and covers.-A milk can B is formed with a flared mouth 10 and its lid has a downturned flange 13 and is held above the rim of the can by a number of offsets 14.
Patent GB-1362159-A (GB)
Title: Fasteners
IPC: F16B19/00
Filed: 1973-06-07
Abstract: 1362159 Fasteners USM CORP 7 June 1973 [8 June 1972] 27207/73 Heading E2B A fastener suitable for use in holding elongate members in position relative to a support 22 comprises a base 28, two legs 40, 42 projecting from the base 28 in spaced relation and an arm 48 projecting from the base 28 and having a free end portion 50 receivable between the legs 40, 42 so as to form with the base and legs a closed loop for encircling the elongate members. The free end portion 50 of the arm 48 and at least one 42 of the legs are shaped for interengagement to restrain relative longitudinal movement between the at least one of the legs and the free end portion and relative lateral movement between the legs and the free end portion being prevented by engaging non-planar surfaces of the legs and free end portion (Fig. 3, not shown). A seaming means 26 is also provided for securing the base 28 to the support 22. The securing means 26 comprises a V-shaped member one limb 30 of which is integral with the base and the other limb 32 having a free end 34. The arm 48 is provided with a strengthening rib 54 and a hinge portion 56. The fastener is of a plastics material such as polypropylene.
Patent GB-906458-A (GB)
Title: Improvements in or relating to humidifiers
IPC: F24D19/00
Filed: 1960-08-05
Abstract: 906,458. Air humidifiers. GIRAUD, H. P. Aug. 5, 1960 [Aug. 10, 1959; Jan. 23, 1960], No. 27234/60. Class 55 (2). An air humidifier for use with radiators comprising a series of spaced vertical elements has a number of tubes 5 each containing water or other liquid and a wick dipping in the water or liquid and exposed to the atmosphere at its upper end, the tubes being suspended between the elements of the radiator from a plate 1 formed with longitudinal slots 3 and 4 by flanges on the upper ends of the tubes. A detachable cover-plate 11 is provided. In a modification a supporting plate with one longitudinal slot is mounted between a cover plate and a plate mounted on the radiator, the arrangement being such that the supporting plate and its attached tubes may be pulled out for inspection.
Patent GB-228486-A (GB)
Title: Improvements in and relating to liquid level indicators
IPC: G01F23/02
Filed: 1924-11-14
Abstract: 228,486. Kalmann, R. von. Nov. 14, 1924. Gauge glasses.-To prevent water collecting in the holes 7 of a tubular metal gauge glass which are closed by glass stoppers 6, draining channels 9 leading from a point near the stopper are provided. The channels may be oblique or vertical, and may connect one hole 7 with another.
Patent GB-646041-A (GB)
Title: Improvements in or relating to apparatus for the production and storage of ice-cream
IPC: A23G9/28
Filed: 1947-10-10
Abstract: 646,041. Ice-cream plant. GIUSTI, R. B., GIUSTI, T., and GIUSTI & SON, Ltd., T. Oct. 10, 1947, No. 27258. [Class 28(i)] A plant for the production and storage of ice-cream comprises a single frame unit 1 in which are mounted a vat 2 for the mixing, homogenizing and pasteurizing of a batch of ice-cream ingredients, having heating means, e.g. a gas burner 21, a.water jacket 3, and a homogenizer 10, and a storage container 12 for the cooling and storage of the batch of mixture treated in the vat, having refrigerating means, e.g. pipes 13 carrying a refrigerant liquid, and a stirring paddle 17, and a conduit having a valve 4 direct from the vat to the container. Specification 583,082 is referred to.
Patent GB-1110082-A (GB)
Title: Machine base
IPC: B01F15/00
Filed: 1966-06-17
Abstract: 1,110,082. Mixing appliances. BLOMQVISTS VERKSTADSAKTIEBOLAG. 17 June, 1966 [1 July, 1965], No. 27285/66. Heading B1C. A machine base (as described for a dough mixer) comprises two elongated feet 4, 5 of inverted triangular cross-section supported at their ends by pads (7, Figs. 3 and 4, not shown) so that the lower edges 12 are clear of the floor; the feet are splayed and their inner ends are separated to leave a clear space 6 below the mixer.
Patent GB-408527-A (GB)
Title: Improvements in and relating to longitudinal sieve machines for the manufacture of paper, cardboard, fibrous building plates and the like
IPC: D21J1/00
Filed: 1933-10-04
Abstract: 408,527. Deckle straps of machines for making paper, cardboard, building-plates, &c. FIBROPLAST GES., 151, Ostwall, Krefeld, Germany. Oct. 4, 1933, No. 27344. Convention date, Oct. 17, 1932. [Class 96.] The deckle straps c of a longitudinal-sieve machine for extracting water from thick webs of stuff, pass round guide rollers d, d<1>, the axes of which are vertical. The deckles c rest on the sieve b, the return run being in the same horizontal plane.
Patent GB-907164-A (GB)
Title: Improvements in or relating to the doping of semi-conductor crystals
IPC: C30B31/10
Filed: 1960-08-08
Abstract: 907,164. Electrically heated apparatus for doping semi-conductor crystals. SIEMENS & HALSKE A.G. Aug. 8, 1960 [Aug. 7, 1959], No. 27387/60. Class 39 (3). [Also in Group XXXVI] Apparatus for doping semi-conductor crystals includes a vacuumtight container 13 having mounted therein a reaction vessel 1 for retaining at least one semi-conductor crystal 3 and a doping substance, electrical means for heating the vessel, and a movable sealing member 9 for sealing the vessel 1 within the container 13, at least that surface of the member 9 adapted to lie in the interior of the vessel 1 and at least the inner surfaces of the vessel 1 itself consisting of tantalum. The vessel 1 is heated to a temperature at which the doping substance is converted to the gas phase. As shown, crystals 3 are supported on a tantalum frame 2 in a tantalum tube 1 between closure members 4 and 5 also of tantalum. Heating current from a variable transformer 16 is passed through the material of the tube 1 by electrodes 11 and 12. A tantalum tube 6 passing through closure member 4 contains a thermocouple 8 connected to a galvanometer 17 for measuring the temperature of the crystals 3. A doping substance 10 is contained in a tantalum housing 9 mounted on a movable tube 19 containing a thermo-couple 23 connected to a galvanometer 17<SP>1</SP> for measuring the temperature of the doping substance 10. The housing 9 can be moved to close the end of a tantalum tube 7 passing through the closure member 5. A heating coil (not shown) may be provided for the housing 9, and axially displaced apertures 9<SP>1</SP> in two walls of the housing prevent too rapid evaporation of the doping substance 10 by heat radiated from the interior of tube 1. A tantalum screening tube 24 surrounds the tube 1 and further screens may be provided at the ends of the tube 1, or in the interior of the tube, to increase the uniformity of the temperature. The electrodes 11 and 12 pass slidably through the wall of the container 13 which may consist of quartz or steel, and is connected to a vacuum pump 14 and a manometer 20. A movable shield 22 co-operating with an apsrture in closure member 4 enables the pressure in the interior of the tube 1 to be adjusted.
Patent GB-1155722-A (GB)
Title: Semiconductor Structure
Inventor: GODEJAHN GORDON CHARLES
IPC: H01L23/29
Filed: 1966-06-20
Abstract: 1,155,722. Semi-conductor devices. NORTH AMERICAN ROCKWELL CORP. 20 June, 1966, No. 27496/66. Heading H1K. A monolithic structure suitable for the manufacture of solid circuits consists of a series of mutually insulated monocrystalline semi-conductor bodies of opposite conductivity types. A typical structure is formed by grooving a uniform resistivity N-type silicon wafer, oxidizing or nitriding the grooved surface and then burying the grooves in vapour deposited silicon, beryllia or alumina. The ungrooved face is next lapped down to the grooves to isolate the regions of the wafer defined thereby and holes cut through other regions of the assembly. One face of a corresponding oxidized P-type silicon wafer provided with mesas to mate with the holes, is fitted to the N-type wafer and silicon deposited in the holes to form the monolithic structure shown in section in Fig. 8. The back face of the P wafer 35 is then lapped to leave the mesas as oxide coated islands and to reexpose the N-type islands at the same face of the structure. In an alternative method, mesas are formed on a P-type wafer, mated with corresponding holes in an N-type wafer and the holes filled with vapour deposited silicon, the wafers having previously been oxidized. The P-types mesas are isolated and the N-type material exposed by lapping as before and isolated bodies of N-type formed subsequently. This is done by grooving the exposed N-type material down to the vapour deposited silicon, oxidizing the grooved surface, burying it beneath vapour deposited silicon and lapping from the opposite face of the assembly down to the grooves to expose both the N and P-type islands. Where the vapour deposited material is adequately insulating the oxide or nitride layers may be dispensed with.
Patent GB-1248994-A (GB)
Title: Laundry products
IPC: C11D3/37
Filed: 1969-05-30
Abstract: 1,248,994. Detergent composition. COLGATE-PALMOLIVE CO. 30 May, 1969 [31 May, 1968], No. 27554/69. Heading C5D. A laundry product comprises agglomerated coloured granules of a detergent builder salt, a water-soluble agglomerating agent which is a polyvinyl alcohol or an alkali metal carboxyalkyl cellulose or a mixture thereof, and a dye or pigment. The alkali metal carboxyalkyl. cellulose is preferably sodium carboxymethylcellulose or sodium carboxyethylcellulose. The product preferably contains 0À3-10 parts by weight of the agglomerating agent and 60-85 parts by weight of the detergent builder salt. The detergent builder salt may be organic, such as an alkali metal salt of N.T.A. or E.D.T.A. or inorganic such as an alkali metal polyphosphate, borate or silicate. Numerous dyes and pigments are specified, those of a blue or purpleblue colour, e.g. ultramarine, being preferred. Fluorescing colouring agents may also be used. Small amounts of plasticizers such as propylene glycol or glycerin may be added. The agglomerates may be formed by contacting the builder salt with a solution of the agglomerating agent and which contains a dye or pigment and agitating to form agglomerates. This may be carried out in a rotary drum, on a Dravo pan, or in a twin-shell blender. The product may be suitably dried by passing a stream of air over the product during or following agitation. At least 85% by weight of the agglomerated particles formed in such a way have a particle size within the range 0À25-2À5 mm. The agglomerated laundry product may be postadded to spray dried detergent components which may comprise conventional anionic, nonionic and cationic surface-active agents, of which numerous examples are specified, to produce a finished detergent. Typically, the agglomerated laundry product is mixed with the remaining detergent components in an amount of 1-65 parts by weight per 100 parts by weight of the finished detergent. Preferably, coloured agglomerates comprise up to 8 parts by weight per 100 parts of the finished detergent. The surface-active agent, which is preferably anionic, is typically present in an amount 2-95% by weight of the detergent, preferably 2-15% by weight in pre-soak detergents and 7-35% by weight in washing detergents. The detergent components may also include additional builder salts and the builder salt in the finished detergent composition is generally in the range 20-90% by weight, preferably 30- 90% by weight in pre-soak detergents and 20-65% by weight in washing detergents. The detergent composition may also contain brighteners, perfumes, preservatives and also sodium sulphate.
Patent GB-689657-A (GB)
Title: Process and apparatus for continuous butter-making
IPC: A23C15/02
Filed: 1950-11-13
Abstract: 689,657. Butter. WESTFALIA SEPARATOR AKT.-GES. Nov. 13, 1950 [Nov. 21, 1949], No. 27651/50. Class 84 In a process for continuous buttermaking, wherein, from a mixture of buttermilk and butter granules, the buttermilk is separated and the granules then being compressed and kneaded, water for washing the butter and/or additives, e.g. salt, flavouring, are added during the compressing and prior to the kneading of the butter. As shown in Fig. 1 the cream flows through a funnel 1 into a butter-making cylinder 2 where a rotary beating shaft 3 revolving at high speed turns the cream into butter granules which are conducted through a hood 4 to a compressing cylinder 5 where two worms 6 rotating in opposite directions compress the granules into butter. The buttermilk is collected in a pocket 7 and drained through a bent tube 8. The butter is pressed through perforated plates 9, 10, 11 between which it is kneaded by rotating vanes 12 and then discharged through a nozzle 13. Additives are introduced through a pocket 15 on the compressing cylinder to which also a salt mill 16 is attached. In a modification of the apparatus (not shown) the salt mill may be replaced by a sprinkler device for incorporating additives or by a distributing device for adding powdery or granular substances. In other modifications (not shown) the washing water may be added by a sprinkler or direct from the main or passed through a heat exchanger to the compressing cylinder and drained off through a tube to a filter.
Patent GB-672205-A (GB)
Title: Improvements in or relating to television pick-up tubes or the like
IPC: H01J29/39
Filed: 1950-11-14
Abstract: 672,205. Cathode-ray tubes. COMPAGNIE POUR LA FABRICATION DES COMPTEURS ET MATERIEL D'USINES A GAZ. Nov. 14, 1950 [Nov. 14, 1949], No. 27816/50. Class 39 (i). In a television pick-up tube or the like of the kind in which an electron image corresponding to an optical image to be transmitted is incident on a storage target electrode, the target electrode comprises a conducting mesh electrically connected to the output circuit of the tube and a continuous insulating layer disposed in close proximity to the mesh on one side thereof so as to cover both the mesh and the interstices therein, and adapted to be rendered locally conducting under the control of an electron beam which is arranged to scan over the mesh side of the target electrode, the electron image being arranged to be incident on the side of the said electrode opposite to that scanned by the electron beam. As shown, the storage target comprises a metallic mesh 1 supporting a thin film 2 of aluminium or beryllium which is easily permeable to the fast electrons in a cathode-ray beam 6 emitted by the electron gun. A thin layer 3 of a good insulator, for example quartz or magnesium fluoride, is deposited on the film 2, and the film 2 and mesh 1 are.connected to the output impedance 7. An optical image is focused on a transparent photo-cathode 9 and the electrons produced by photo-electric emission are accelerated by means of the cylindrical anode 10, the electron image being focused on the layer 3 by means of the coil 11. Charges are stored on the layer 3 which are a function of the illumination of each image element, these charges being positive if the secondary emission is greater than unity. When an element of the layer 3 is traversed by the beam 6 it becomes instantaneously conductive, the neighbouring elements retaining their insulating property, but as soon as the beam has left an element the insulation is re-established with a time-constant which is a function of the substance employed and its thickness. If the film 2 is made highly negative with respect to the anode 10, the production of a conductive path in an element of the layer 3 provides an intense video signal. In a modification the mesh 1 is filled with a substance which fluoresces with a short afterglow under the impact of the beam 6, and instead of the layer of quartz a thin layer of cadmium sulphide or other material exhibiting photo-conductivity, covers the surface of the mesh 1 on the electron image side. There will be a storage of positive charges at the surface of the cadmium sulphide layer as in the previous case, but at the instant of scanning an element of the layer is strongly illuminated by the light produced in the fluorescent layer and the resistance of the cadmium sulphide layer at that point falls to provide a conductive path. The photo-conductive target can be improved by depositing at the surface a metallic mosaic, for example comprising silver in the form of microscopic islets insulated one from another.
Patent GB-361045-A (GB)
Title: Improvements relating to press boards for use in book binding
IPC: B42C13/00
Filed: 1930-09-18
Abstract: 361,045. Embossing - presses. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Met-L-Wood Corporation; 6755, West 65th Street, Chicago, U.S.A.) Sept. 18, 1930, No. 27884. [Class 100 (ii).]. A press-board for use in a book-finishing press comprises a body portion 10, Fig. 7, of fibrous material, which may be laminated, which is disposed between metallic laminations or veneers 11, 12 adapted to form the exterior surfaces of the board and to provide, or assist to provide, a beading 14, 15 along the marginal edge of the board, for emphasizing the grooves forming the hinge connections of the book covers. Interposed between the metallic layers 11, 12 and the body portion 10 are fabric sheets 13 preferably of Canton flannel, and all the layers are bound together by adhesive. The beads 14, 15 are formed by turning up a flange portion 16 along the marginal edges of the metallic sheets 11,12 to co-operate with a connecting-strip 17. The latter is provided with flanged edges to grip over the marginal flanges 16 and is preferably depressed at each corner for the reception of the legs of an angle-bracket 190, Fig. 3, which bracket is held in the depressions by screws. In the form shown in Fig. 6, the metallic layers 31, 32 are bent around an insert-strip 36 to form the beading 34, 35 and secured by soldering. In another modification, the edging of the board and the beading are provided by the metallic layers only and the ends which meet along the edges of the board may be offset from one another and soldered, or turned inwardly and embedded in the body portion of the board and subsequently soldered.
Patent GB-677407-A (GB)
Title: Improvements in and relating to single-phase series commutator motors
IPC: H02K27/04
Filed: 1950-11-15
Abstract: 677,407. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 15, 1950. [Nov. 21. 1949] No. 27941/50. Class 38 (iii). [Also in Group XXXV] A single phase series commutator motor has a resistor (which may be variable) connected in shunt with its main field winding, and the value of the resistor is so related to the electrical characteristics of the motor that the power factor under normal running conditions is substantially improved. In the diagram MN represents the current in the shunt resistance, OM the excitation current, and ON the current IA in the armature. OC<SP>1</SP> represents the voltage U at the terminals of the motor, OA<SP>1</SP> the electromotive force E<SP>1</SP> B<SP>1</SP>C<SP>1</SP> the total reactive drop wLIA, and A<SP>1</SP>B<SP>1</SP> the total ohmic drop wLIA, and A<SP>1</SP>B<SP>1</SP> the total ohmic drop IAR. The phase angle #<SP>1</SP> between the total current and voltage is therefore reduced by the shunting of the series field winding. The compensator windings may also be shunted by a resistive or inductive impedance.