baber/WOPTO huggingface dataset:
Patent GB-1441732-A (GB)
Title: Ferrimagnetic ferrites and their manufacture
IPC: C04B35/26
Filed: 1974-01-10
Abstract: 1441732 Mn Ni Zn ferrites GENERAL ELECTRIC CO Ltd 17 Dec 1974 [10 Jan 1974] 01200/74 Heading C1J A ferrite has essentially the composition where a=0À46 to 0À68, b=0À03 to 0À12, c=0À20 to 0À42, a+b+c=1À00 and x=0À95 to 1À05. The ferrite may contain minor amounts of additives, e.g. 0À02 to 0À05 wt. per cent CaO. The ferrite may be prepared by forming an intimate mixture of manganese oxide, nickel oxide, zinc oxide and ferric oxide, each oxide being in its free form or in the form of a compound decomposable by heat to the oxide, heating to effect partially a ferrite forming reaction, and subjecting the partially reacted material in powder form, to pressure and heat, either successively or simultaneously to complete the ferrite forming reaction and to produce a dense ceramic ferrite body. The starting mixture may be obtained from a mixture of oxalates precipitated in aqueous solution. The final heating step may be carried out by prepressing of the partially reacted powder at room temperature, and sintering, e.g. hot pressing in one or more stages such hot pressing, together with the use of neutral and slightly oxidizing atmospheres is described in detail. The ferrite material produced may have a high density and a low porosity and be of use in magnetic recording heads.
Patent GB-695932-A (GB)
Title: Transfer mechanism for counters
IPC: G06M1/16
Filed: 1952-01-16
Abstract: 695,932. Transfer mechanism; zeroizing mechanism. VEEDER-ROOT, Inc. Jan. 16, 1952 [Feb. 7, 1951], No. 1240/52. Class 106 (i). Transfer mechanism between a pair of counter wheels of successive order comprises support means (19) disposed between the wheels (12,13), a transfer pinion (23) journalled by the support means within the peripheries of the counter wheels, driving means (transfer tooth 25) adjacent the axis of the counter wheel of lower order intermittently engageable with the transfer pinion to drive it during advance of the counter wheel of lower, order, a driven gear (32) disposed adjacent the axis of the counter wheel of higher order and engaged by the transfer pinion in driving relation, and means (33) interconnecting the counter wheel (13) of higher order and the driven gear (32) during rotation of the latter in one direction to advance the counter wheel of higher order. The engagement of the gear 32 with the spring- urged pawls 33 pivoted on the counter wheel, provides a positive drive during transfer; when the shaft 11 is rotated clockwise for zeroizing, and the groove 40 therein engages the tails of spring-biased pawls 41 on each counter wheel to return each of the latter to zero position, the pawls 33 are cammed out of locking engagement with the gear 32. The transfer pinion is in Geneva-type engagement with the lower order counter wheel.
Patent GB-1024195-A (GB)
Title: Production of finely divided expandable thermoplastics
Inventor: STAHNECKER ERHARD
IPC: C08J9/20
Filed: 1963-01-11
Abstract: A finely-divided expandable thermoplastic is produced by polymerization of monomers in fine dispersion in an aqueous medium, a liquid or liquefiable gas expanding agent being added when the final spectrum of polymer particles sizes has been established the addition being completed at the latest when polymerization is 95% complete. Specified monomers are:  styrene, vinyl chloride, vinylidene chloride, vinyl ethyl ether, vinyl acetate, N-vinyl carbazole, ethyl acrylate, acrylonitrile and methacrylamide.  Specified expanding agents which are non-solvents for the polymer are: propane, butane, pentane, hexane, cyclopentane, cyclohexane, dichlorodifluoromethane and 1 : 2 : 2-trifluoro-1 : 1 : 2-trichloro-ethane. The process may be carried out at 50-100 DEG  C. in the presence of 0.2-0.5% of a catalyst, e.g. benzoyl peroxide or azoisobutyronitrile.  Pressure due to the vapour pressure of the reactants may be applied. Additives may be dyes, plasticizers, flame retardants, e.g. chloroparaffins or brominated oligomers of butadiene, and/or protective colloids.  The expanding may be added to the extent of 3-15% of the monomer and may contain a solvent, e.g. methanol or ethanol but one component should have a b.p. below the softening point of the mixture.  In Example 1, sodium pyrophosphate, styrene acrylonitrile, n-butyl stearate, benzoyl peroxide and a copolymer of N-vinylpyrrolidone and methyl acrylate are mixed in water and heated. Pentane is added as expanding agent.  In the other examples, (2) the acrylonitrile and n-butyl stearate are omitted, (3) hexabromocyclododecane is added in place of acrylonitrile and n-butyl-stearate and the expanding agent is a pentane/1 : 1 : 2 - trifluoro - 1 : 2 : 2 - trichloroethane mixture, (4) methyl methacrylate is added in place of acrylonitrile and n-butyl stearate and the expanding agent is a pentane/methanol mixture.
Patent GB-548904-A (GB)
Title: Improvements in or relating to the installation of electrical instruments on aircraft
IPC: H02G3/12
Filed: 1941-01-31
Abstract: 548,904. Two-part couplings ; plug boards. TRIGGS, W. W. (Lapco Soc. Anon.). Jan. 31, 1941, No. 3616. [Class 38 (i)] Interconnection of the wiring installation of an aircraft is effected by a junction box 1, the internal connections of which are brought out to multiple socket fittings to receive multiple plugs 2 attached to cables 3 leading to a source of current 4 and the various instruments 5, 6, 7. The box is built up of readily separable parts, a base 10 attached to a support, a polygonal wall 11 carrying the socket fittings, and a cover 12, all secured together by a stud 16 and nut 18. When the nut is removed the internal connections are accessible from both sides of the part 11.
Patent GB-1411185-A (GB)
Title: Method for the manufacture of alkali metal hydrosulphites
IPC: C01B17/66
Filed: 1973-01-10
Abstract: 1411185 Alkali metal hydrosulphites PENNWALT CORP 10 Jan 1973 [3 Aug 1972] 1352/73 Heading C1A Alkali metal hydrosulphites are made by reacting an alkali metal sulphite, bisulphite (including metabisulphite), or hydroxide with sulphur dioxide and an alkali metal formate in a liquid medium consisting of one or more of dimethylformamide, dimethylacetamide, N- methylacetamide and diethylacetamide, optionally in admixture with up to 30% by weight of water, based on the total solvent medium.
Patent GB-1002362-A (GB)
Title: Thermal treatment of pitch
Inventor: MCKEAN JOHN BOWIE
IPC: C10C1/19
Filed: 1963-01-11
Abstract: <PICT:1002362/C4-C5/1> <PICT:1002362/C4-C5/2> Pitch is rendered suitable for use a binder for shaped carbonaceous bodies, such as carbon electrodes, by passage through a heated tube whose inner surface is scoured by scrapers.  The pitch may be heated to 360-480 DEG  C. and maintained at the desired temperature until it has attained the required characteristics. The pressure may be atmospheric or increased sufficiently to prevent volatilization.  The treated pitch may be cooled by heat exchange with untreated pitch. Liquid pitch from 1 is pumped by 2 through pipe 3 to heat exchanger 4; it then passes through pipe 5 to heating unit 6 which consists of a number of heating tubes, each as illustrated in Fig. 2, i.e. having at least one scraper element 15 supported on rotatable shaft 15, which is sealed at the end wall of the tube by 17 and may be supported on a bearing 18 and having an inlet 19 and an outlet 20. The pitch flows in series through the stacked tubes, which may be heated by electric heating jackets, by hot combustion gases or by a heated fluid, and hot pitch then passes via pipe 7 into reaction unit 8, similarly fitted with tubes, where it is maintained at the desired temperature for the required time.  Treated pitch leaves 8 through pipe 9 and passes again through heat exchanger 4 and then through pipe 10 (which may contain a restricting device 11 if increased pressure is desired) to cooling unit 12 and thence through discharge pipe 13 into, for example, moulds.  "Pitch" as used herein includes pitches derived from coal tar and from any tar produced by thermal decomposition of naturally occurring carbonaceous material such as petroleum oil, wood or shale, of natural bitumens and of bitumens obtained as residues in the distillation of petroleum.
Patent GB-834918-A (GB)
Title: Improvements relating to vacuum operated braking apparatus
IPC: B60T13/46
Filed: 1957-01-15
Abstract: 834,918. Vacuum brakes. GRESHAM & CRAVEN Ltd., and MARSH, G. C. Jan. 14, 1958 [Jan. 15, 1957], No. 1500/57. Class 103 ( 1 ). In a vacuum brake quickaction valve device comprising a pressure-sensitive element in the form of a diaphragm 14 subject on one side to vacuum present in the first chamber 15 arranged to be open permanently and without restriction to the vacuum brake pipe through connection 16a and subject on the other side to vacuum present in the second chamber 17 arranged to be open permanently without restriction to the lower chamber of the associated vacuum brake cylinder (not shown) through passage 18a and port 53, a check valve 40a comprising the sole means of communication between the vacuum-brake pipe and the lower chamber and permitting flow only from the latter to the former so as to enable evacuation of the lower chamber, a third chamber 23 arranged to be interposed between the lower chamber and the check valve 40a valve means 29a controlling the opening and closing of the third chamber 23 to atmosphere and arranged to be actuated by the pressure-sensitive element 14 in such a manner as to be opened only on the degree of vacuum in the second chamber 17 exceeding that in the first chamber 15 by more than a predetermined amount, and first (35a) and second (44a) flow-restricting means effective to restrict flow respectively to the third chamber 23 from atmosphere and from the third chamber 23 to the lower chamber whereby to ensure accurately controlled feeds of atmospheric air to the lower chamber and to the brake pipe through connections 16a. A strainer 36a is provided to filter atmospheric air admitted into the valve device and is provided between the first flow restricting means in the form of a choke 35a and the atmosphere.
Patent GB-264844-A (GB)
Title: Improvements in aircraft with pusher propellers
IPC: B64D33/08
Filed: 1927-01-19
Abstract: 264,844. Rohrbach Metall-Flugzeugbau Ges. Jan. 20, 1926, [Convention date]. Propelling; tanks, arrangement of. - Aircraft engines mounted in nacelles and driving pusher propellers are provided with forced air cooling means. A fixed radial engine e is mounted in a nacelle c supported by struts b from a plane a, an engine plate e<1> being supported from the struts b by other struts. A passage f is formed through the nacelle and divides into branches f<1> leading to each cylinder, the outlets being narrower than the cylinders. A fan gin the passage is driven from the engine through a change speed gear h. Other branches f<2> are directed to the bases of the cylinders from which the air is sucked by fan blades d' on the propeller hub. The passage may be closed by a cap m at high speeds when the external slip stream is sufficient to cool the engine. Petrol tanks i and tanks k for circulating oil are provided around the passage, the tanks being cooled by the airstream for which purpose they may have inwardly projecting fins. Two modifications are described for vertical cylinder engines, partitions being formed in the air passage to direct the air past the cylinders and discharge it at the top or side of the nacelle.
Patent GB-1493201-A (GB)
Title: Double heterostructure junction laser
IPC: H01S5/227
Filed: 1975-01-14
Abstract: 1493201 Double heterostructure lasers WESTERN ELECTRIC CO Ltd 14 Jan 1975 [17 Jan 1974] 1634/75 Headings H1C and H1K A double heterostructure junction laser comprises a semiconductor body 10 having wide band gap layers 14 and 18 with a contiguous and relatively narrower gap active layer 16 in between, layer 16 having a P-N junction and a stepped region of greater thickness the dimensions of which are chosen to allow oscillation of only the fundamental transverse mode when the P-N junction is forward biased. Using wave equations, ratios of the thickness of the active layer 16 at its stepped as compared with peripheral portions are plotted against maximum stepped portion width and against transverse wave numbers for the stepped and the peripheral portions. From these families of curves dimensions are chosen for continuous wave operation at room temperature and for pulsed high power operation. A stripe geometry contact 24, of a width chosen relative to the width of the stepped region 32 and the transverse wave number for the peripheral field, helps further to confine the optical field. The layers 14, 16, and 18, may be n Al x Ga 1-x As, p GaAs, and p Al y Ga 1-y As, respectively, on an n GaAs substrate. To avoid problems of contact adhesion a p GaAs layer 20 may be used with zinc diffused on its top surface to get high conductivity. A heat sink may be coupled to the top surface of the laser through the contact 24.
Patent GB-852649-A (GB)
Title: Improvements in and relating to the manufacture of waterproof unwoven fibre strips
IPC: D04H1/587
Filed: 1958-01-17
Abstract: 852,649. Agglutinated fibrous materials; laminates, coated fabrics. ELOD, E. and SZENTPALY L. VON, [trading as FABERG-PRODUKTE V. SZENTPALY & CO., KOMM.- GES.]. Jan. 17, 1958 [Jan. 18, 1957; Oct. 29, 1957], No. 1743/58. Class 140. A method of manufacturing waterproof unwoven fibre strips of high strength comprises placing non-twisted carded or combed strands composed of parallel staple fibres in parallel relationship so that the outer fibres of adjoining strands are in contact with each other substantially over their whole length to form a fibre fleece, impregnating said flange with an aqueous dispersion or emulsion of a thermoplastic resin having a solids content of 25 to 75% and containing an organic swelling agent for said resin in an amount sufficient to adjust the viscosity of said dispersion, measured in a Ford viscosity cup with a 4 mm. nozzle to an outflow time of from 15 to 18 seconds, heating the impregnated fleece to remove water and the swelling agent, pressing said fleece to form a flat fibrous band and cutting the band into strips. Specified fibres are those of viscose rayon, cuprammonium rayon, polyamides and polyesters, hemp or ramie. Specified thermoplastic resins are polyvinyl chloride, polyvinyl acetate of low hydroxyl content, polyvinyl ethers, polystyrene, polyvinylidene chloride, polyacrylic compounds and polyisobutylene and copolymers and mixtures of these compounds. Protective colloids e.g. gelatine or polyvinyl alcohol may be added and also an emulsifying agent. The dispersions or emulsions of the bonding agents may be converted to foam and the fibres impregnated therewith. Specified swelling agents are toluene, acetone, ethyl acetate and trichloroethylene. The fibres may first be passed through a combing roll. The fleece may be impregnated by passing through the dispersion or emulsion, squeezed between rollers and then passed through one or more drying chambers, and finally calendered between hot rolls. To the emulsions or dispersions of the bonding agent there may also be added aqueous solutions of pre-condensates of aminoplasts and curing catalysts to impart crease-resistance, octadecylene urea, paraffin or wax emulsions, ammonium zirconyl carbamate and ammonium oleate to impart water repellency, ammonium salts, chlorinated paraffins and antimony oxide to impart flame-resistance and dibutyl phthalate, polyadipates, polypropylene and glycol adipate to impart improved hand. The fibrous strips made according to the invention may be woven on looms to form fabrics, which may then be coated with a thin synthetic resin layer by applying a thin film or foil of polyvinyl chloride or polyamides. The film may be applied by hot pressing on hot rollers. Polyethylene paste may be spread on to the fabric.
Patent GB-467851-A (GB)
Title: Process for the treatment of ladies' hats of plaited viscose fibre
IPC: D06M13/188
Filed: 1936-01-20
Abstract: Ladies' hats of plaited viscose fibre are rendered immune to the effect of rain or moisture by treatment with a solution of a synthetic resin to which has been added a small amount of formic acid and rosemary oil.  In an example a mixture is prepared containing a resin known under the trade name "Mowilith," acetic ether, alcohol, formic acid, rosemary oil, and a plasticizer.
Patent GB-821471-A (GB)
Title: Improved dough sheeting machine
IPC: A21C3/02
Filed: 1957-01-18
Abstract: 821,471. Dough-sheeting machines. VICARS Ltd. T. & T., and NAYLOR, J. F. Jan. 10 1958 [Jan. 18, 1957], No. 1858/57. Class 87(2). A dough - sheeting machine comprises a beating roller E cooperating with a driven feed roller C to draw dough from a hopper A, and an anvil I, the spacings between the beating roller E and both the feed roller C and anvil I being continuously variable. The beating roller E moves in an oval or "egg shaped" path as seen in Fig. 3 (not shown). The feed roller C is adjustably mounted to vary the distance between it and the beating roller E and has a visual indication device to show that distance, and may have transverse peripheral ribs. The anvil I comprises a travelling belt B supported on a roller, having end flanges K to control the width of the dough sheet, located under the beating roller E and the speed of the belt B relative to the feed roller C is variable. The beating roller E is mounted on blocks F adjustably supported on rods G to vary the distance between the roller E and the anvil I, the rods G passing through pivoted blocks J and connecting with a rotable eccentric H which, on rotation, imparts the oval motion to the beating roller E. In operation, dough from the hopper A is deposited as a sheet by the rollers C, E onto the travelling band B and, on passing beneath the roller E is beaten and consolidated by its vertical reciprocation.
Patent GB-1356263-A (GB)
Title: Modified double-stranded rna
IPC: C07H21/00
Filed: 1971-01-14
Abstract: 1356263 Antiviral compositions containing modified double stranded RNA BEECHAM GROUP Ltd 11 Jan 1972 [14 Jan 1971] 1940/71 Heading A5B [Also in Division C3] A pharmaceutical composition useful generally in the prophylaxis of viral infections comprises a modified form of a natural ds. RNA having antiviral activity and a reduced acute toxicity relative to the normal form of ds. RNA from the same natural source which is obtained by (a) treating the natural form of ds. RNA with an alkali metal hydroxide at a pH between 11.0 and 12.5 in an aqueous electrolyte solution, under conditions of temperature, time and electrolyte concentration such that partial separation of the polynucleotide strands of each ds. RNA molecule commences immediately and no more than 25 phosphate di-ester linkages per strand are hydrolysed during the period of the reaction and then (b) neutralising the resultant solution. Detailed physical chemical and medicinal properties are given.
Patent GB-572662-A (GB)
Title: Process for the production of anhydrous magnesium chloride
IPC: C01F5/32
Filed: 1941-02-12
Abstract: 572.662. Anhydrous magnesium chloride. ABBEY, A. (Consolidated Mining & Smelting Co. of Canada, Ltd.). Feb. 12, 1941, No. 1948. [Class 1 (iii)] Anhydrous magnesium chloride is produced, in a molten state suitable for direct addition to an electrolytic cell for the manufacture of magnesium, by sintering magnesium oxide at a temperature, e.g., 1,250 to 1,400‹C. sufficiently high to cause incipient fusion into a strong porous structure which is broken into pieces “ to 1¢ inches across and charged into a chlorinating furnace together with pieces of coke, e.g., 20 per cent. of petroleum or metallurgical coke of similar size, in which it is maintained at a temperature, e.g., 1,100‹C., above the melting point of magnesium chloride but below that at which much volatilization thereof occurs. The furnace 1 may be heated by vertical carbon resistances 6, drilled axially, and positioned to give uniform temperature. Chlorine is injected through a nozzle 7, magnesium chloride is drawn off at 4, residue is removed through a door 8, and exit gases leave through openings 10 in the cover 9; the walls may be of silica bricks. The magnesium oxide may be obtained by calcining, e.g., at 700‹C., magnesium bearing ores or concentrates. e.g., from dolomite, brucite, or magnesite.
Patent GB-933964-A (GB)
Title: Luminous advertising and display means
IPC: G09F13/26
Filed: 1960-01-20
Abstract: 933,964. Moving signs. S. D. PIETERS. Jan. 20, 1960 [Jan. 28, 1959], No. 2017/60. Class 3 (1). In a moving display device comprising a tubular indicator 4 through which gas-charged liquid is circulated by a compressor 12, the liquid, which may have a glittering substance dispersed therein, is either illuminated by a light source, or else contains fluorescent material which is rendered luminous by ultraviolet light. Liquid is fed from a container 8 through a control valve 14 and indicator tubes 4, and is recirculated through a tank 19 having a float-controlled outlet leading to the container 8. Compressed air is fed to the liquid distribution stream by the. compressor through a valvecontrolled inlet 15, 16. Preferably, a screen is provided just behind the indicator tubes, which screen may be of glass or polymethylmethacrylate coated with an opaque or weakly translucent substance except for those portions which are covered by the tubes, or may be of an opaque material, e.g. sheet metal, wood or hardboard, apertures being cut which are transparent and may be glazed with coloured glass or plastic. In a modification (Fig. 4, not shown), a mixing vessel is incorporated within the container, compressed air and the liquid are supplied to the vessel through apertures, and flow through the liquid supply aperture is varied by an adjustable needle valve. Different coloured liquids, or liquid and gas, may be circulated in succession in both embodiments.
Patent GB-1408324-A (GB)
Title: Agents for the treatment of molten iron
IPC: C21C1/10
Filed: 1973-01-15
Abstract: 1408324 Ni-Mg alloy INTERNATIONAL NICKEL Ltd 15 Jan 1973 [27 Jan 1972 29 Dec 1972] 2085/73 Heading C7A An alloy, which can be used to add Mg to metallic melts, consists of:-
Patent GB-289170-A (GB)
Title: Improved process for the activation of carbon or carbonaceous material
IPC: C01B32/336
Filed: 1927-01-24
Abstract: 289,170. Carpmael, W., (I. G. Farbenindustrie Akt.-Ges.). Jan. 24, 1927. Right to Patent relinquished. Carbon.-Carbon or carbonaceous material is activated by gases containing no free oxygen which may be caused to diffuse through a diaphragm into the activating chamber, or may be introduced diredtly into the chamber. In both cases the gaseous products of activation diffuse out of the chamber through the diaphragm and, after oxidation, may pass back into the chamber and take part in the activation. In one form, the carbon is placed in a fire-clay tube, which may be rotated, enclosed in an externally heated wider iron tube. The activating gas, e.g., steam, is passed into the space between the tubes and diffuses through the fireclay tube forming water gas with the carbon during activation. The water gas diffuses out and is withdrawn, or is burned in the outer space, the gases produced diffusing back into the activation chamber. In modification, water vapour is passed directly into the activation chamber in which a slight excess pressure is maintained, and the water gas diffusing out is burned by air circulated through the outer space, the heat produced maintaining the activation temperature. In other forms, the outer space may be used as the activation chamber, or the process may be made continuous by employing long slightly inclined tubes, and the tubes may have longitudinal ribs. A revolving furnace may also be used. Reference has been directed by the Comptroller to Specification 269,477.