baber/WOPTO huggingface dataset:
Patent GB-547853-A (GB)
Title: New perylene derivatives
IPC: C09B5/62
Filed: 1941-03-12
Abstract: 547,853. Dyes. HADDOCK, N. H., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. March 12, 1941, No. 3361. [Class 2 (iii)] Perylene derivatives. Thiocyano and xanthic ester derivatives of perylene-3:4:9:10-tetracarboxy-di-(phenylimide) are obtained by treating with thiocyanates or xanthates tetrazotized perylene-3:4:9:10-tetracarboxy-di-(m- or paminophenylimides) (cf. Specification 201,786, [Class 2 (iii)]), in which the phenylene nuclei may carry alkyl or alkoxy groups containing not more than 4 carbon atoms. The products are hydrolyzed by sodium sulphide to the corresponding mercaptans and are applicable for dyeing cotton, from a sodium sulphide vat, bright red shades, specially fast to light, chemick and boiling soap solution. The disulphides obtainable by oxidation of the mercaptans, e.g. with air or with sodium m-nitrobenzenesulphonate, are similarly applicable. In examples, (1) perylene-3:4:9:10- tetracarboxy - di - (m - aminophenylimide) is tetrazotized with sodium nitrite and sulphuric acid and the resulting diazonium sulphate is treated with an aqueous solution of sodium thiocyanate and warmed to 95‹C.; (2) the corresponding di-(p-aminophenylimide) is simiarly treated; (3) the diazonium sulphate of (1) is treated with an aqueous solution of potassium ethyl xanthate or the corresponding isopropyl or n-butyl esters and warmed to 50‹C. with addition of sodium carbonate ; (4) perylene- 3:4:9:10 - tetracarboxy - di - (m - amino - p - methylphenylimide) is tetrazotized with sodium nitrite and sulphuric acid and the solution is treated with an aqueous solution of sodium thiocyanate and slowly heated to boiling ; (5) perylene - 3:4:9:10 - tetracarboxy - di - (m - amino - p - methoxyphenylimide) is similarly converted into the di-(m-thiocyano) derivative ; (6) perylene - 3:4:9:10 - tetracarboxy - di - (m - aminophenylimide) is tetrazotized with sodium nitrite and hydrochloric acid and the solution is treated with an aqueous solution at 60-80‹C. containing potassium isopropyl xanthate and sodium carbonate.
Patent GB-454486-A (GB)
Title: Improvements in and relating to television transmitting apparatus embodying cathode ray tubes
IPC: H01J29/08
Filed: 1935-02-01
Abstract: 454,486. Television cathode-ray tubes. BROWN, W. S., 20, Lexham Gardens, Kensing- ton, London. Feb. 1, 1935, No. 3372. [Classes 39 (i) and 40 (iii)] In a television circuit including a cathoderay tube having a mosaic 5 of mutually insulated elements capacitively associated with a common signal plate and scanned by a cathode-ray, an auxiliary electrode system is arranged out of the path of the ray between the mosaic and the electron gun producing the ray or substantially in the plane of the mosaic and is biassed to produce a potential gradient transverse of the mosaic so as to minimize spurious signals generated in the signal plate. " Base-line wander " in the signal due to unequal collection of secondary electrons from the scanned mosaic by the second anode 11 of the electron gun, is thus reduced or other parasitic signals such as those described in Specification 431,207 are corrected for. As shown, a tube similar to that described in Specification 445,485 has the electron gun in a neck 3 and the mosaic 5 held obliquely to the gun between riveted mica sheets 4 and introduced through a neck 2. Springs 7 .. 9 support the mosaic, a lead 10 is provided for the signal plate and the auxiliary electrodes are wires 13 .. 15 raised above the plane of the mosaic by rivets 13<1>.. 151. The wires are parallel to and shorter than the sides of the mosaic and may be replaced by wires sealed through the bulb 1. The wires 13, 15 at the sides reached by the ray at the end of a scanning line or period are biassed positively relatively to the anode 11 and the wire 14 may be left idle or given a large negative potential with respect to the anode 11. In modifications, the lead 10 or one or more of the springs 7 .. 9 are biassed to act as auxiliary electrodes, the wires 13..15 being omitted. One or more of the auxiliary electrodes may also be used to generate auxiliary signals correcting for the spurious signals on mixing with the picture signals directly or after amplification : the positively biassed wires may be connected through a resistance and condenser to the signal plate or to a tapping on the resistance connected to the signal plate, or a supporting wire leading to the signal plate may be biassed to constitute the auxiliary electrode and to develop auxiliary signals directly superimposed on the picture signals. The tube may be arranged as described in Specification 442,666.
Patent GB-809549-A (GB)
Title: Improvements relating to adjustable chairs
IPC: A47C1/028
Filed: 1956-02-02
Abstract: 809,549. Seats. PETHYBRIDGE, E. G. Jan. 29, 1957 [Feb. 2, 1956], No. 3383/56. Class 52(2) An adjustable chair comprises a base 10 and a seat portion 11 pivoted to a front crossbar 14 of the base so as to be capable of movement transverse to the pivotal axis and angularly adjustable on the base by means of a series of hooks 36 which engage a rear crossbar 15 of the base. The front of the seat carries a pair of U-shaped brackets 27 which embrace the front crossbar 14. The back rest is preferably integral with the seat and the sides of the base are provided with arm rests. According to the Provisional Specification the seat and back rest may be hinged together and the seat pivoted to the base so as to be incapable of transverse movement, in which case adjustment is effected by the engagement of a crossbar carried by the seat back with toothed racks fixed to upward extensions of the base. A similar arrangement is described with the seat and back rest fixed together.
Patent GB-691878-A (GB)
Title: Improvements in or relating to apparatus for cutting pieces from a rope of toffee orlike material
IPC: A23G7/00
Filed: 1951-02-13
Abstract: 691,878. Cutting pieces from a rope of toffee or the like. FORGROVE MACHINERY CO., Ltd., and HARRIS, R. A. Dec. 4, 1951 [Feb. 13, 1951], No. 3475/51. Class 87 (ii).  A rope of toffee, caramel &c. is fed to a rotary cutting knife 31 by a pair of grooved feed rollers 11, 12. The rope passes from the rollers to a channelled guide 30 closed by a cover plate 38 which is hinged at 39 and rests by its weight or under spring pressure on the guide 30. If the rope of toffee exceeds a certain thickness the cover 38 is raised, rotating lever 43 and eccentric 46 and causing a rod 47 to actuate a switch 27 which stops the motor driving the feeding and cutting mechanism. The severed pieces are delivered to a wheel 37 which transfers them to a packing device.
Patent GB-563968-A (GB)
Title: Improvements in bag-feeding machines
IPC: B65B43/30
Filed: 1943-03-03
Abstract: 563,968. Packeting. AKTIEBOLAGET G. AREHNS MEKANISKA VERKSTAD. March 3, 1943, No. 3532. Convention date, March 20, 1942. [Class 94 (i)] A device for feeding bellows-sided paper bags to a filling machine, and for expanding them, comprises means for separating two oppositelydisposed members which grip the sides of a bag at its mouth, and means for inserting the sides of the bag in the gripping-members. The bags A, Fig. 1, each have a thumb notch B formed in one wall at the mouth. The flattened bags are delivered one at a time by a chain conveyer 3, Figs. 1 and 3, ,between rolls 6, 7 which crease the bags along the lines of final folding. Each bag comes to rest on a table 8, whence it is taken by a suction head 10 and transferred to a turret 11 which is rotated step-by-step by a Geneva gear 62, 63. The turret is provided with four sets of grippers, each of which consists of a fixed jaw 31, Figs. 3 and 9, and a jaw 32 that is moved radially along.slide rails 45 by a fixed cam as the turret rotates. The jaws 31, 32 are provided with spring-operated clamps 47, 48 respectively, and these clamps are moved away from the jaws by arms 51, 52 on a reciprocating rod 50 when a bag is to be inserted. In use, the suction head 10 grips a bag on the table 8 and swings it into the vertical position, the notch B allowing one side of the bag to pass the jaws 31, 32 while the other side is stopped by the jaws, thus opening the bag slightly as shown in Fig. 9. The head 10 is then raised by an oscillating lever 59 and lifts the bag so that the sides are gripped between the jaws and the clamping plates 47, 48. The head 10 then releases-the bag and moves backwards, and the movement of the turret carries the bag to the next station, the jaw 32 being drawn backwards during the movement to open the bag fully. As soon as the bag comes to rest, a plunger 67, Fig. 3, descends into the bag and expands the lower part. Subsequent movements of the turret carry the bag to a position below a filling- nozzle 71. Finally, the clamps 31, 32 are opened, by a rod similar to the rod 50, to release the filled bag and allow it to drop on to a conveyer 12.
Patent GB-726841-A (GB)
Title: Process and apparatus for contacting vaporized hydrocarbons with fluidised finely divided solid catalyst
IPC: B01J8/00
Filed: 1953-02-10
Abstract: In processes for the catalytic conversion of hydrocarbon vapours in presence of a fluidized solid catalyst, reduction in the size of the apparatus and improved conversion ratios are obtained by arranging the conventional cyclone <PICT:0726841/III/1> catalyst separators inside the reaction or regeneration zones and discharging them by gravity by pipes dipping into a fluidized catalyst bed, the level of which is lower than that of the catalyst bed in the reactor or regenerator.  The reactor 2 is divided by a sector plate 3 into reaction and stripping zones. Catalyst dust entrained in the gaseous reaction products is removed therefrom in a conventional two-stage cyclone separator 4, 5 and the separated catalyst is discharged by gravity through a pipe 8 into the catalyst bed in the stripping zone, the level of which is maintained lower than that in the reactor.  The regenerator 1 is similarly constructed.  The construction enables the height of the sector 3 to be increased, thus enabling the height of the catalyst bed to be raised as shown in hachured lines.  The addition depth of catalyst bed thus obtained is stated to double the reactor throughput capacity.  Alternatively, the stripping zone may be in the form of an annular zone surrounding the reaction zone.
Patent GB-382156-A (GB)
Title: Method for blackening or subsequently colouring pictures in graphite or the like on paper
IPC: B44D2/00
Filed: 1932-02-08
Abstract: 382,156. Treating paper and pulp. GRœNERT, A., 20, Marktstrasse, Weimar, Germany. Feb. 8, 1932, No. 3713. Convention date, Feb. 10, 1931. [Class 96.] In blackening or colouring pictures on paper, the paper or a waterproof layer thereon of cellulose esters or ethers &c., e.g. of nitrocellulose, is moistened with a grease-repellant, e.g. dilute acid or glycerine, and contacted with a grease or oil paint, or with a pigment in a grease solvent, so that only the picture absorbs the paint &c. The paper, e.g. pergamyn, parchment, oil, or paraffin paper, may be grease-proof or slightly pervious to water, and may be satined or frictioned, and then ground with wire brushes. Oil or paraffin paper may be treated with alkalies, acids, or other mordants or solvents, or with steam or gas. When employing pergamyn paper boric acid &c. may be added to the paper pulp, or montan wax &c. applied to the paper web.
Patent GB-1536027-A (GB)
Title: Preparation of pyrophosphates
IPC: C01B33/021
Filed: 1976-01-30
Abstract: 1536027 Preparing pyrophosphates CARBORUNDUM CO 30 Jan 1976 [7 Feb 1975] 03718/76 Heading C1A Pyrophosphates are prepared by heating a blend of an oxide or oxides with a stoichiometric excess of at least 40% of a source of P 2 O 5  to a reaction temperature at a rate of at least 200 C. degrees per hour, maintaining the temperature, preferably 700-750 C., for at least 4 hours and cooling. The preferred oxides are ZrO 2 , SiO 2 .¢H 2 O or a mixture of the two.
Patent GB-748276-A (GB)
Title: Manufacture of iso-and tere-phthalic acids
Inventor: GARDNER CYRIL
IPC: C07C51/265
Filed: 1953-02-11
Abstract: A modification of the processes claimed in the parent Specification and 735,074 is characterized in that the para-xylene is replaced by meta-xylene or by a mixture of metaxylene and para-xylene so that isophthalic acid or a mixture of isophthalic acid and terephthalic acid is obtained and that any catalyst which has been proposed for the catalytic liquid phase oxidation of alkyl benzenes to the corresponding carboxylic acids is used in the process for the oxidation of the meta-xylene or mixture of meta-xylene and para-xylene with oxygen, air or other mixture of gases containing oxygen.  Catalysts mentioned include oxides of cobalt, lead, barium, iron, manganese, chromium, copper and nickel or salts of the same metals and in particular suitable metals of which the oxides or salts may be used are to be found in Period 4, Groups 6, 7 and 8 of the Periodic Table of the elements. The catalyst should preferably be soluble in meta-xylene or in the mixture of meta- and para-xylenes. The mixture of acids may be separated into the two acids, e.g. by esterification with methanol and separation of the mixed esters by recrystallization from a suitable solvent, e.g. methanol, or the mixture of acids may be used in the manufacture of alkyd resins or fibre-forming or other polyamides.  In examples: isophthalic acid containing some toluic acid is obtained by oxidizing meta-xylene in the presence of cobalt naphthenate with air at elevated temperature, distilling unreacted xylene from the reaction product and heating the residue consisting essentially of meta-toluic acid, isophthalic acid and meta-xylyl-meta-toluate with dilute nitric acid under pressure (1) and in a similar process a mixture of terephthalic, isophthalic, para-toluic and meta-toluic acids is obtained from a mixture of para-xylene and meta-xylene, the products being esterified with and the esters recrystallized from methanol (2).  After the removal of dimethyl terephthalate the residue is fractionated to obtain dimethyl isophthalate and a mixture of methyl-para-toluate and methyl-meta-toluate and the latter mixture is oxidized with air to obtain a mixture of methyl hydrogen terephthalate and isophthalate.
Patent GB-1481666-A (GB)
Title: Low pressure drop filter medium
IPC: D04H1/72
Filed: 1975-01-29
Abstract: 1481666 Air filters MINNESOTA MINING & MFG CO 29 Jan 1975 [30 Jan 1974] 3884/75 Heading BIT [Also in Division B5] Room and respiratory air filters comprise a filter medium wherein porous webs, e.g. compacted non-woven polyethylene terephthalate fabrics, sandwich one or more layers of micro fibres of average diameter less than 0.5 micrometres (see Div B4-5). In a room air filter, a blower moves air from an inlet to an outlet and the filter medium is disposed across the air path, e.g. as a web which is advanced at 2 inch/day or less from a supply roll to a takeup roll. The microfibres may be air-attenuated solution-blown polymer fibres (suitable polymers being specified) and the layer(s) thereof may be formed in situ on one of the porous webs, may weigh less than 0.06 lb/yd<SP>2</SP>, and are generally non-self-supporting. Relationships between face velocity, particle penetration and pressure drop are specified.
Patent GB-1478984-A (GB)
Title: Gas carburusing
IPC: C23C8/22
Filed: 1974-11-27
Abstract: 1478984 Furnace atmosphere JOSEPH LUCAS Ltd 27 Nov 1974 [29 Jan 1974] 03986/74 Heading F4B [Also in Division C7] A carburizing atmosphere is produced in a furnace at 775‹-1025‹ C by introducing methanol which decomposes to form CO, which in turn produces C + CO 2 , wherein a hydrocarbon gas, e.g. propane or natural gas, is introduced to react with the CO 2  and maintain the desired carbon potential. An example refers to the carburizing of steel.
Patent GB-1222053-A (GB)
Title: Process for the manufacture of porous membranes
IPC: B29C44/00
Filed: 1969-01-24
Abstract: 1,222,053. Porous membranes. KALLE A.G. 24 Jan., 1969 [26 Jan., 1968], No. 4091/69. Heading B5B. [Also in Division C3] A porous membrane having an oriented capillary structure is made by diffusing multivalent cations having a coagulating effect into a fluid aqueous polyelectrolyte sol, followed by dehydrating a layer of the resulting gel on a porous support. Dehydration may be on a water-absorbent surface and be assisted by vacuum; pressure may also be used at this stage to deform the pores. Further dehydration may involve displacing remaining water with an organic solvent miscbile therewith. The product may be strengthened by impregnation with glycol, glycerol, a polyglycol or a polymer precursor, e.g. a urethane or melamine polycondensate. In examples, ions from CuNO 3  are diffused into an Na alginate sol, and the resulting gel is cut into layers and dried.
Patent GB-1061510-A (GB)
Title: Apparatus for producing seals in packaging film by the multipoint method
IPC: B29C65/02
Filed: 1966-01-31
Abstract: 1,061,510. Seaming non-metallic sheet material. DAREX G.m.b.H. Jan. 31, 1966 [Feb. 10, 1965], No. 4223/66. Heading B5K. Apparatus for producing multipoint seals in packaging films comprises a sealing bar 2 of insulating material provided with spaced perforations 4 through which a resistance wire 6 is threaded so that spaced apart portions of the wire 6 extend on each surface of the insulating material. Preferably, the wire portions on each surface form a discontinuous straight, angled or open or closed curved line, e.g. rectangular, circular, oval or almost punctiform shapes. Several mutually offset discontinuous lines may be formed. The sealing bar may be convex in shape, Fig. 4 (not shown), springs 26 being used to maintain it in outwardly bowed shape. The insulating material of the bar 2 may be an asbestos cement strip, a temperature-resistant and possibly somewhat flexible plastic plate, a fibre fabric or a laminated fabric. The wire 6 may be made of chrome nickel having a diameter of 0À2-0À4 mm. and may be supplied via a transformer or via an impulse generator. Hard and soft polyvinyl chloride and shrinkable and non-shrinkable polyethylene and polypropylene films are specified.
Patent GB-594064-A (GB)
Title: Compositions of matter for treating molten ferrous metals and methods of producing iron and steel therewith
IPC: C21C7/00
Filed: 1943-03-12
Abstract: A composition for refining molten steel consists of 25-60 per cent of one or more of the metals titanium, zirconium, vanadium, and niobium, 0.1-10 per cent of beryllium or boron or both, and the remainder iron.  The constituents are preferably pre-alloyed, but may be unalloyed or partly alloyed and fused in the form of a briquette, and some of the constituents may be in the form of easily decomposable compounds such as nitrides or nitrates.  The amount of addition agent used is less than 5 per cent of the steel.
Patent GB-287517-A (GB)
Title: Improvements in or relating to explosive priming mixtures
IPC: C06B41/08
Filed: 1928-02-10
Abstract: 287,517. Remington Arms Co., Inc., (Assignees of Burns, J. E.). March 23, 1927, [Convention date]. Explosives.-A priming mixture for ammunition comprises an initial explosive such as mercury fulminate, a non-corrosive ozidizing ingredient such as barium or lead nitrate, and normal lead trinitroresorcinate, to which may also be added a fuel such as antimony sulphide, for example in the following proportions :- mercury fulminate 10 to 40 per cent, antimony sulphide 20 to 45 per cent, barium nitrate 10 to 60 per cent, and lead trinitroresorcinate 5 to 35 per cent. Other non-corrosive oxidizing salts, such as lead chromate, lead nitrate, and potassium nitrate, and other fuels such as lead and copper sulphocyanate, may wholly or in part replace barium nitrate and antimony sulphide respectively. These compositions are stated to cause no corrosion of the gun barrel.
Patent GB-554995-A (GB)
Title: Improvements in and relating to bearings
IPC: F16C35/10
Filed: 1942-03-31
Abstract: 554,995. Bearings. JOY, R. E., and RAY ENGINEERING CO., Ltd. March 31, 1942, No. 4278. [Class 12 (i)] In a Mitchell-type bearing, the tilting pads have an external taper engaging a conical housing and are spring-pressed into their housing by a bush screwing into a sleeve. The casing 10 carries sleeves 15 forming housings for the pads 20, each sleeve having tapering ribs 22 which engage wider and tapering recesses in the pads. The pads have flanged ends 26 engaged by a thrust washer 31 and bush 30 threaded into sleeve 13 carried by the casing and provided with a disc 32 connected by a spring 34 to a casing bracket 35, so that spring-rotation of the disc 32 will adjust the pads against compression springs 27. External axial thrust is taken up at the other end of the spindle 16 by a similarly rotated bush 30 with thrust washer 40 engaging a spindle shoulder 16<SP>1</SP> which engages the front pads 20. The lubricant is force-fed and returns to a sump where the oil is kept at the level A, to cover a thermal control device 70 having an arm 71 connected by an oilpressure device to the discs 32 to maintain a temperature connection. Specification 554,769 is referred to.
Patent GB-542375-A (GB)
Title: Improvements in pressure gas generators comprising internal combustion engines and air compressors driven thereby
IPC: F04B25/02
Filed: 1940-03-07
Abstract: 542,375. Combustion-product plant. AKTIEBOLAGET GOTAVERKEN. March 7, 1940, No. 4307. Convention date, March 31, 1939. [Class 7 (i)] Two or more air compressors are provided for supplying an internal-combustion engine, the air being compressed through stages in one or more compressors and cooled while passing from one stage to the next, the other compressors being designed without this intermediate cooling. Fig. 1 shows two engine cylinders 1 fitted with opposed pistons 2, 3, the latter of which are connected to compressor pistons 4 operating in cylinders 5. The engine shaft drives a two-stage compressor 11, 12, the air being cooled while passing from the first to the second stage. This cooled compressed air, together with hot compressed air from the pumps 5, is passed through a heat-exchanger 28 and led by a conduit 30 to the engine inlet ports 31. Some of this air passes through the exhaust ports 32 and pipe 33, together with the exhaust gases, to form the combustion products. The compressor 11, 12 may be omitted, and one or more of the pumps 5 made two-stage with cooling-means. Some of the air may be passed directly to the exhaust pipe 33.
Patent GB-271784-A (GB)
Title: An illuminating system and means applicable to billiard tables or other tables
IPC: F21V7/05
Filed: 1927-02-16
Abstract: 271,784. Dollard, J. Feb. 16, 1927. Lighting, systems of.-Lights for illuminating billiard and other tables are provided with reflecting shades 1, 2 shaped and arranged so as to light the table top as uniformly as possible and so that outermost effective rays strike the outer edges or boundaries 3 or corners 4 of the table top. The inner sides of the end shades are less steeply inclined than the outer sides, as shown. The shades may be connected together by rods on which they can be slidden for adjustment of position.