baber/WOPTO huggingface dataset:
Patent GB-783768-A (GB)
Title: Improvements in neoprene cement
IPC: C08L11/00
Filed: 1954-02-25
Abstract: A fast-curing neoprene cement contains rubbery chloroprene polymer dissolved in a solvent and, as an accelerator, a mixture of a saturated aliphatic amine, carbon disulphide and an alkylene polyamine.  Specified neoprenes are polychloroprene and the copolymers of chloroprene with styrene, acrylonitrile, vinyl pyridine, vinyl chloride, vinylidene chloride, chlorotrifluoroethylene, butadiene, isoprene, dichlorobutadiene, and pentadienes and the reaction product of polychloroprene with sulphur. Specified solvents are benzene, toluene, xylene, ethylene dichloride, trichloroethylene, amyl acetate, butyl formate, butyl acetate, ethyl acetate and propionate, methyl ethyl ketone, isophorone and mixtures thereof.  Specified amines are morpholine, t-butylamine, propylamine, di- or tri-amyl, butyl, ethyl or propyl amine, di-(2-ethyl-hexyl) amine, dibenzylamine, cyclohexylamine, dicyclohexylamine, benzyldiethylamine, tri-n-propylamine, and piperidine.  Specified alkylene polyamines are ethylene, propylene, butylene, hexylene, and amylene diamines, diethylene triamine, triethylene tetramine, tetraethylene pentamine, and pentaethylene hexamine.  Retarders such as zinc butyl xanthate, zinc amyl xanthate and zinc propyl or isopropyl xanthate may also be present.
Patent GB-463167-A (GB)
Title: Improvements in kep gear for hoist conveyances
IPC: B66B17/34
Filed: 1936-08-12
Abstract: 463,167. Holding lift-cages at noors &c. ; charging cages from hoppers. JAECKEL, F. O. Aug. 12, 1936, No. 22218. [Classes 78 (iii) and 78 (iv)] Hydraulic braking-mechanism, used in place of the usual keps for bringing skips and mine cages to rest at the loading and unloading points in the shaft, comprises pairs of opposedbrake shoes 12 fixed in the shaft and adapted to contact with guide-engaging channelled members 5 on the cage. Each brake shoe is operated by multiple superposed hydraulic cylinders 11 connected to a common actuating main cylinder 14. Projections 50 on a descending cage or skip rock the lever 19 and force the rod 20 upwards to operate the slide valve 16 to admit pressure fluid to raise the ram 15 to apply the brakes against the action of springs. A spring-controlled piston 31 moving in a reservoir 30 compensates for differences in the application caused by variation in thickness of the brake shoes or in the spacing apart of the brake surfaces on the cage. Immediately after rising, the rod 20 falls again slowly under the control of a weight 21 and a dash-pot 22, which is cut out by a valve 26 on the up-stroke. Thus by the time loading is completed, the brakes are released and the weight of the cage is transferred gradually to the hoisting-rope. The lever 19 as shown is not connected to the rod 20, so that it is free to be moved aside by an ascending skip from a lower level, but it may be connected thereto and operated by hand, with or without the dash-pot 22. The apparatus, as shown, is combined with a charging-mechanism in which a weighted door 36 of the hopper 35 is opened when the brakes are applied. The upward movement of the ram 15 causes the tail-piece 44 to relieve the pressure in the system 45, 42, 39 thus allowing the piston 38 to fall and the weight 43 aided by the contents of the hopper to open the door 36 by swinging it about its pivot. Conversely, the release of the brakes re-applies the pressure to close the door. During the rising of the member 44, a spring piston 47 follows up and keeps the door closed until prevented from further movement by the stop 48. This ensures that the brakes are applied before the door is opened. On the return stroke the initial pressure on the piston 47 due to the springs raises the pressure in the door-operating system earlier in the stroke and so closes the door before the brakes are fully off.
Patent GB-875668-A (GB)
Title: Hydroxy carboxy amino-carboxylic acid amides and process for their manufacture
Filed: 1958-07-10
Abstract: Hydroxy-carboxylamino-carboxylic amides which contain the grouping <FORM:0875668/IV (b)/1> wherein R represents a divalent radical remaining after deduction of the amino- and carboxylic groups from a beta-amino-carboxylic acid, and R1 represents hydrogen or the radical of an amino-acid or a peptide, are prepared by molecular rearrangement of esters of betaaminocarboxylic acids and aliphatic alphahydroxy-carboxylic amides with the grouping <FORM:0875668/IV (b)/2> the rearrangement being effected by means of a strongly basic agent such as sodamide, potassium tertiary butylate, sodium-phenyl or lithium-phenyl, in a suitable solvent.  By esterifying the hydroxy-group with a beta-amino acid and repeating the molecular rearrangement, the polypeptide chain can be extended by the addition of any desired number of the same or different beta-amino acid radicals.  In an example, a solution of potassium in tertiary butanol is added to a solution of O-(b -alanyl)-glycollic acid amide in a mixture of dioxane and tertiary butanol, and the mixture is agitated for two hours at room temperature.  The mixture is then poured into water, and a small proportion of an ion-exchange resin is added. When the solution is neutral, it is evaporated in vacuo.  By crystallization from a mixture of methanol and ether there is obtained glycollyl-b -alanine amide.  The O-(b -alanyl)-glycollic acid amide is obtained by catalytic hydrogenolysis of O-(carbobenzoxy-b -alanyl)glycollic acid amide.  This latter is obtained by reacting carbobenzoxy-b -alanine with glycollic acid amide in the presence of phosgene, triethylamine and pyridine. Specifications 831,973 and 867,572 are referred to.
Patent GB-1075287-A (GB)
Title: Vinylidene chloride copolymer emulsions
IPC: C09D127/08
Filed: 1966-05-19
Abstract: Aqueous emulsions for coating absorbent materials are obtained by the aqueous emulsion polymerization of a mixture of vinylidene chloride and vinyl chloride in a weight ratio of 0.6-4 also containing 1-100 grams per kilogram of a plasticizing monomer chosen from alkyl, cycloalkyl or aryl ester of an unsaturated dicarboxylic acid the alcohol residues of which contain 4-18 carbons and/or a vinyl ester of a saturated carboxylic acid of 6-18 carbons. In a preferred embodiment the plasticizing monomer is introduced after the copolymerization is 20-80% completed. There may also be added a keying monomer, e.g. acrylic acid, maleic anhydride, acrylamide or itaconic acid, and as emulsion stabilizer vinyl sulphonic acid.ALSO:Aqueous emulsions for coating absorbent materials are obtained by the aqueous emulsion polymerisation of a mixture of vinylidene chloride and vinyl chloride in a weight ratio of 0.6-4 also containing 1-100 grams per kilogram of a plasticising monomer chosen from alkyl, cycloalkyl or aryl ester of an unsaturated dicarboxlic acid the alcohol residues of which contain 4-18 carbons and/or a vinyl ester of a saturated carboxylic acid of 6-18 carbons. In a preferred embodiment the plasticising monomer is introduced after the co-polymerisation is 20-80% completed. There may also be added a keying monomer, e.g. acrylic acid, maleic anhydride, acrylamide or itaconic acid, and as emulsion stabiliser vinyl sulphonic acid.  Kraft paper, carboard, fabrics, regenerated cellulose or coated paper is coated with the above emulsions.  In examples two coats are applied to kraft paper, drying after each coat.
Patent GB-407253-A (GB)
Title: Improvements in writing implements
IPC: B43K21/00
Filed: 1933-03-10
Abstract: 407,253. Pencil leads. WAHL CO., 1800, Roscoe Street, Chicago, U.S.A. March 10, 1933, No. 22310. Convention date, Aug. 24, 1932. Divided on 407,824. [Class 146 (iii).] A thin lead for propelling pencils is made of octohedral cross-section and has four equal longer straight sides and four equal shorter curved sides arranged alternately. The four shorter sides 10<b>, Fig. 3, of the lead 10 are preferably curved to an equal radius from the centre of the lead. Owing to its oross-section the lead consistently presents a finer writing surface to the paper than one of circular cross-section ; e.g. one of the sides 10<b> may first be used and when this is worn down a second fine surface may be presented by a rotation of the lead through, say, 45‹. If the lead is slightly over size it is still usable, since the faces 10<b> are easily shaved away and the resultant dust can escape through the passages between the faces 10<a> and the tip, thus preventing clogging. When used with a resilient split socket which may be distorted from the true circular shape, the co-operation of the non-circular part K, Fig. 5, of the socket and the flats of the lead prevents rotation of the lead. The lead is also adapted for convenient use with tips of the rigid type, in which ridges on the tip bite into the lead, and has a greater strength against breakage than a polygonal lead with a smaller number of sides.
Patent GB-531784-A (GB)
Title: Improvements in or relating to apparatus for the electrical precipitation of suspended particles from gaseous fluids
IPC: B03C3/70
Filed: 1939-08-01
Abstract: 531,784. Electrical precipitation apparatus. LODGE-COTTRELL, Ltd. (Siemens-Lurgi-Cottrell-Elektrofilter-Ges. fur Forschung und Patentverwertung.). Aug. 1, 1939, No. 22347. Drawings to Specification. [Class 39 (i)] In electrical gas-cleaning apparatus of the type in which the gas treating chamber is sealed by liquid which is also an insulator for the leading in conductor and in which the space above the seal is scavenged by dry, clean gas, for example, SO 2 , the scavenging gas is pre-heated by interchange of heat with the gases undergoing treatment. For this purpose the scavenging gas is led to the space above the seal by a pipe which passes through the gas treating chamber.
Patent GB-750679-A (GB)
Title: An arrangement of exhaust valves in a two-stroke cycle internal combustion engine
IPC: F02B75/02
Filed: 1954-07-30
Abstract: 750,679. Cylinders. MITSUBISHI SHIPBUILDING & ENGINEERING CO., Ltd. July 30, 1954 [Aug. 8, 1953], No. 22387/54. Classes 7(2) and 7(3) Exhaust passages 6, 7, 8 having individual outlets at one side of a two-stroke engine cylinder head 1 lead from valves of which one, 4, is on the same side of the cylinder axis as the outlets and two, 2, 3, are on the opposite side. The cylinder 16 has inlet ports 18 supplied by a scavenge air receiver 19, and the head 1 has a fuel injector 15, starting valve 12, safetfy valve 13 and pressure indicator valve 14.
Patent GB-653286-A (GB)
Title: Improvements in or relating to hydraulic shock absorbers
Inventor: HOGG WILLIAM
IPC: F16F9/49
Filed: 1948-08-26
Abstract: 653,286. Hydraulic shock absorbers. GIRLING, Ltd. Aug. 26, 1948, No. 22491. [Class 108(iii)] In a direct-acting hydraulic shock absorber, a passage 21 for liquid through the piston 17 is controlled by a valve or plunger 31 which is adapted to be moved into a position to close the passage by engagement with a part 32 of the cylinder 10 on an excessive return or rebound movement of the piston 17. The plunger 31 is stepped as shown, and is outwardly pressed by a spring 33 which however may be dispensed with. The plunger 13 is maintained in the passage-opening position (Fig. 1, not shown), by differential pressure acting on its ends. The remainder of the shock absorber may be as described in Specification 613,960.
Patent GB-662212-A (GB)
Title: Improvements in spring seat constructions
IPC: B60N2/70
Filed: 1949-08-31
Abstract: 662,212. Spring upholstery. COX & CO. (WATFORD), Ltd., and TOON, C. Aug. 31,1950. [Aug. 31, 1949] No. 32023/49. Class 52 (iv). In a spring cushion comprising an assembly of sinuous wire springs spanning a frame the springs and their resilient end supports are bent from the same length of wire 1 which is annealed at the points of bending and the respective limbs relatively displaced through substantially 180 degrees and secured together by clips or like securing devices 5, 7 applied to the superposed transverse parts of the spring adjacent the bend. A border wire 2 can be provided which is clipped to the springs and the latter may also be connected by transverse helical wires 4.
Patent GB-664465-A (GB)
Title: Improvements in the manufacture of cellulose esters of organic acids
IPC: C08B1/02
Filed: 1949-08-31
Abstract: Fibrous cellulose is rendered more reactive towards organic esterifying agents by fibrillating it in a liquid medium, and is then subjected to esterification so as to form an organic ester of cellulose.  Fibrillation is defined as the breaking down of the fibres in such a way that partial or complete separation of the fibres into their constituent fibrils occurs and predominates over any transverse cutting or breaking that may also occur. Fibrillation may take place in a hollander or other paper-pulp beater, or in a pulp-refiner comprising two plates having opposing corrugated or otherwise roughened faces which are rotated relative to each other at a high speed and with a small degree of clearance, preferably less than 0.075 in.  The treatment may be applied to cotton linters, chemical wood-pulps, and cellulose derived from bamboo, reeds, esparto, jute, straws, e.g. linseed and hempseed straw, grasses, peanut hulls, and barks.  The liquid medium may be a fatty acid, e.g. formic, acetic, propionic, or a butyric acid, preferably in a concentration of 75-100 per cent and in an amount of 25-1000 parts by weight for each 100 parts of cellulose.  The fatty acid solution may contain a small proportion of esterification catalyst such as sulphuric acid.  Water alone may be used, e.g. in amount 50-100 times the weight of the cellulose, or the water may contain a small proportion of sulphuric acid.  Other liquids which may be used are: nitro-paraffins such as nitro-methane, alkylene chlorides such as methylene chloride, and aqueous solutions of alkalis.  If fibrillation is carried out in water, it is preferred to replace the water by a lower fatty acid without allowing the cellulose to dry before it is treated with the esterifying medium.  The esterification may be carried out by means of an organic acid anhydride, a catalyst, and a solvent for the cellulose ester or a non-solvent diluent such as benzene or toluene.  The esterification time may be as short as 4 minutes.  Cellulose acetate, propionate, butyrate, benzoate, aceto-propionate, aceto-butyrate, or aceto-stearate, may be produced. In an example, cotton linters are fibrillated by beating them for 1 hour in a paper-pulp beater in presence of more than 5 times their weight of water.  The water is displaced by acetic acid, and the cellulose is then esterified with a mixture of acetic anhydride and sulphuric acid which has been pre-cooled to -5 DEG  C.  The temperature rises during the acetylation to 64 DEG  C. and a clear solution of cellulose acetate is obtained.
Patent GB-1143767-A (GB)
IPC: G04B19/30
Filed: 1966-05-20
Abstract: 1,143,767. Illuminating scales. HONEYWELL Inc. 20 May, 1966 [1 June, 1965], No. 22691/66. Heading F4R. [Also in Divisions G1 and G5] In indicating-apparatus the curved surface of a dial 32 is illuminated by edge lighting a curved transparent wedge 36 by a lamp 40 and preventing glare by spacing an inverted wedge 38 in front so that any stray light from wedge 36 is trapped in wedge 38 and absorbed by a light-absorbing strip on the bottom edge of wedge 38. Dial mechanism 28 pivoted on a support 26 has three curved dial faces 30, 32, 34. The wedges 36, 38 may be glass or plastics and the light-absorbing strip may be paint.
Patent GB-1151351-A (GB)
Title: An Apparatus for Playing Board Games Simulating Searches
Inventor: WHITE WALTER JAMES
IPC: A63F3/00
Filed: 1965-05-28
Abstract: 1,151,351. Indoor games. W. J. WHITE. 26 Aug., 1966 [28 May, 1965], No. 22712/65. Heading A6H. . In apparatus for playing board games one or more electrically conducting moveable pieces on each of a pair of electrically resistive boards, Fig. 9, are connected into an electric circuit with an electrical indicating device, the boards are provided with contacts and corresponding contacts on the boards are connected together whilst contacts on each board are connected to adjacent contacts by means of resistances or a resistive coating on the board. As the movable pieces on one board approach positions corresponding to positions occupied by pieces on the other board the resistance is reduced and alters the frequency of a note from an oscillator or the reading on an ammeter. When corresponding positions are occupied lamps are lit.
Patent GB-492621-A (GB)
Title: Process for the treatment of materials containing metallic sulphides
IPC: C22B3/06
Filed: 1937-08-19
Abstract: Lead, mercury, or silver are extracted from ores or other materials containing sulphides thereof, it may be selectively, by lixiviation with a neutral or weakly acid dilute aqueous solution of a ferric salt, such as the nitrate, acetate, or borate, adapted to form a salt with the metal to be extracted which is soluble in cold water. Sulphur is set free and precipitated.  Examples relate to the treatment of a mercury sulphide ore and of a complex zinc lead ore. In the latter case, zinc sulphide remains undissolved.  In an example, a ferric nitrate solution is circulated in countercurrent through a complex zinc lead ore, and the lead nitrate-ferrous nitrate solution electrolysed in a cell with lead cathodes and graphite anodes using a high current density and efficient circulation. Crystalline lead is deposited and the ferric nitrate solution reformed recirculated through the ore.  The Specification as open to inspection under Sect. 91 comprises also the extraction of metals other than lead, silver, and mercury whose chlorides are insoluble or only slightly soluble in cold water, and includes examples of extracting ores containing metallic silver and mercury.  This subject-matter does not appear in the Specification as accepted.
Patent GB-224335-A (GB)
Title: Improvements in and relating to electrical discharge devices
IPC: H01J5/02
Filed: 1923-09-13
Abstract: 224,335. British Thomson-Houston Co., Ltd., (General Electric Co.). Sept. 13, 1923. Vacuum tubes. - Discharge apparatus having large rigid conductors is provided with easily demountable seals making gastight insulating connections to a metal con. tainer, provision being made for displacement of the parts due to expansion. A copper or other enclosing tube 1 forming the anode is joined at opposite ends to glass tubes 2, 3 by conical thimbles 4, 5 formed of a coppercoated alloy of nickel and iron having a coefficient of expansion approximately equal to that of glass. These thimbles are joined to the tube 1 by inserting the rim of the thimble in a groove in the tube 1 and applying a solder to make a tight seal, in a similar manner to that shown in Fig. 3 in connection. with the bottom seal. The cathode consists of a tungsten or other refractory rod 6 joined by swaging or otherwise to threaded caps 7, 8 of molybdenum or other machinable refractory metal which are screwed into heavy copper or other tubular conductors 9, 10. The enlargements 11, 11' act as shields to prevent electrons from striking the glass or seals. Additional shields 12, 12' may be provided. The conductors 9, 10 are cooled by water supplied by tubes 13, 14, 15, 16. The glass tube 2 is fused at its upper end to a thimble 19, which is let into a groove in a conical metal closure 20 and joined thereto by solder. The glass tube 3 is fused at its lower end to a thimble 21, which is fitted into a groove in a ring 22 and secured by solder, as shown in Fig. 3. The ring 22 is attached by means of a resilient diaphragm 23 of crimped copper &c. to a ring 24 fixed to the tube 10, thus permitting relative movement between the cathode 6 and the anode 1. A weight or spring 25, Fig. 3, may be provided to assist the cathode in holding the diaphragm extended. Shields 26, 26<1> may be provided between the thimbles 19, 21 and. the cathode leads 9, 10. The anode 1 is surrounded by a brass or other jacket 27, which is provided with an expansible diaphragm 31 and inlet and outlet tubes 28, 29 for the circulation of cooling-fluid. A removable closure 28<1> may be provided to permit inspection of the anode 1. Fluid-cooled collars 29<1>, 30 are interposed between the seals 4, 5 and the anode section of the tube 1 to permit heating the anode by operating the tube to drive out gas without over heating the seals. The space current may be controlled by the choking action of the magnetic field due to the cathode current. For example, a powerful high-frequency current may be produced from a direct current by impressing current of half the desired frequency on the cathode and connecting the cathode and anode to a source of direct current. The cathode terminals 36, 37 consist of a copper ring 38 connected to a split clamp 39 by flexible radial wires 40. The ring 38 engages a channel in an arc-shaped fixed terminal, not shown, to which it is bolted. Longitudinal motion of the cathode is thereby permitted, while offering a low resistance to highfrequency currents.
Patent GB-804028-A (GB)
Title: Improvements in and relating to centrifugal couplings
IPC: F16D37/00
Filed: 1956-07-25
Abstract: 804,028. Powder clutches. RANZI, U. July 25, 1956 [Aug. 3, 1955], No. 23010/56. Class 80(2). A centrifugally engaged powder clutch between driving and driven shafts F, G comprises a toroidally-shaped casing A containing powdered or like material C and a driven rotor R integral with the driven shaft, the plane M of the rotor being inclined to the plane per. pendicular to the main axis of the gear so that relative rotation between the two parts of the clutch causes the powder &c. to be subjected to axially directed impulses. As shown, the periphery 46 of the rotor R may be equiangular in cross-section, but alternatively the apex of the surfaces forming the periphery may be offset to one side or the other of the central plane M of the rotor, Figs. 3, 4 (not shown). Annular grooves N in the hubs of the casing A and of the rotor R contain resilient rings P which act as seals to prevent the escape of the powder.
Patent GB-1335448-A (GB)
Title: Chairs
IPC: A47D1/00
Filed: 1971-04-19
Abstract: 1335448 Chairs GERRY DESIGNS INC 19 April 1971 [2 March 1970] 23017/71 Heading A4J A readily disassembled and portable chair usable in a plurality of different positions comprises a pair of side-wall members 10, shaped so as to be stable in different positions and held in spaced relation by at least three shouldered dowels 15 releasably secured in holes in the members 10, and a flexible seat member 13 supported by the dowels to provide a seat in any of the positions of the chair. One or more of the edges of the members 10 may be curved to give a rocking action; in a chair of such form one additional dowel similar to the others but clear of the seat member may be provided to serve as a hand-hold for a child, who may stand on the seat instead of sitting. The seat member may, as shown, be in the form of an endless loop, which may surround all the dowels freely or may be secured to one of them; alternatively, Fig.13 (not shown), it may be of T form with loops at each of its three ends to receive the dowels. The members 10 may have a number of holes to provide for alternative positions of the dowels.