baber/WOPTO huggingface dataset:
Patent GB-1017987-A (GB)
Title: Halogenated polycarbonates
IPC: D01F6/64
Filed: 1964-07-02
Abstract: A polycarbonate is made by reacting phosgene with a halogenated bisphenol of formula <FORM:1017987/C3/1> where X and Y are each hydrogen, chlorine, bromine or C1-C4 alkyl.  Reaction may be effected by a solution process in the presence of a tertiary amine and a solvent for the polycarbonate or by an emulsion process in the presence of an aqueous solution of an alkali metal hydroxide and a water-immiscible organic solvent for the polycarbonate.  The latter process may be effected in two stages in the first of which an intermediate polymer having chloroformate end groups is produced. The intermediate is then mixed with additional sodium hydroxide to increase the pH to 10-12 and a quaternary ammonium phosphonium or arsonium catalyst and phosgenation continued. The reaction may be effected in the presence of (a) a chain-terminator (e.g. phenol, p-cumyl phenol, p-N-methyl acetamidophenol, chlorophenol, nonyl alcohol or butyl alcohol) which is preferably added between the first and second stages or (b) an antioxidant, an additive to prevent the decomposition of phosgene or an additive to react preferentially with phosgene decomposition products (e.g. sodium dithionite, potassium bisulphite or carbon monoxide). The polycarbonates are soluble in methylene chloride, ethylene chloride, pyridine and acetone and are useful in the manufacture of coatings, fibres and films.
Patent GB-634458-A (GB)
Title: Improvements in or relating to egg collecting carriers
IPC: B65D85/32
Filed: 1947-10-14
Abstract: 634,458. Egg boxes. WILLIAMS, A. J., and RANNOCH, Ltd., J. Oct. 14, 1947, No. 27512. Addition to 616,093. [Class 18] A modified form of a tray-supporting device forming the subject-matter of the parent Specification has two arms 1 pivotally mounted on a plate 2. Each arm consists of an open frame element of substantially square G form having vertically aligned portions 3, 4 above and below the gap in the G. These portions are engaged in holes 14, 15 in the plate 2, the arms thus being swingable close to the side of the box to which the plate is attached or projecting out substantially parallel or slightly inclined inwards to each other. A tongue 9 on each frame element contacts the plate to resiliently locate the arms in their opened out position.
Patent GB-1499900-A (GB)
Title: Apparatus for separating particles from a gas
IPC: B01D46/02
Filed: 1975-06-30
Abstract: 1499900 Filtering tar from gas stream TAISEI KENSETSU KK 30 June 1975 [8 April 1975] 27586/75 Heading B1T  Entrained tar is filtered from a waste gas in a bag filter 1 wherein each bag 3 is given a coating of 'filter aid' which retains the tar and can be shaken from the bags by means 2 and discharged by screw conveyor 12 and valve 13. Fig. 1 shows three filters operating in parallel having respective valves 5, 7 and 11 to control inlet and outlet of gas and inlet of 'filter aid'. After a period of filtration the bags in one housing will clog, whereupon valves 5; 7 are closed and the bags shaken by means 2. Valves 7 and 11 are then opened to deposit a new layer of 'filter aid' on the clean bags, valve 11 is closed and valve 5 opened to start filtration. The 'filter aid' and tar which has collected in hopper 1a is discharged by conveyor 12. 'Filter aid' may be clay, slag, talc, diatomaceous earth, coal, coke or dust obtained from making coal gas. Used 'filter aid' can be cleaned and recycled or discarded, or in the case of coal and coke recycled to the gas or coke-making plant.
Patent GB-1121718-A (GB)
Title: Improvements in or relating to microphones
Inventor: GAYFORD MICHAEL LAWRENCE
IPC: H04R1/38
Filed: 1966-06-21
Abstract: 1,121,718. Microphones. STANDARD TELEPHONES & CABLES Ltd. 21 June, 1966, No. 27601/66. Heading H4J. A microphone includes an electroacoustic transducer unit 1 suspended in a hollow casing 2 by two spaced resilient members 3 and 4 each attached to the inside of the casing 2 and to the transducer unit 1, the members 3 and 4 insulating the unit 1 from mechanical vibration and shock and providing acoustically isolating internal walls in the casing 2. The casing 2 is preferably of circular section and each member 3 and 4 is a flat annulus. Members 3 and 4 are of rubber or plastics. Bolts 5, 8 and 12, 13 secure the members 3 and 4. The transducer unit 1 is a moving coil unit comprising a magnet and a, diaphragm 16. A wind and breath shield comprises an inner fine gauze 17 and an outer coarse gauze 18. The members 3 and 4 define a phase-changing chamber 20. Apertures 21 are covered internally with acoustic resistance material 22. A bass equalizing tube 23 leads inwardly from a side aperture 24 in the casing 2. A bass chamber 25 is connected to the rear of the diaphragm 16 by a tube 28, which may contain acoustic resistance material. The rear end of chamber 25 is closed by a transformer 26 and a connecting plug 27.
Patent GB-729833-A (GB)
Title: Process and apparatus for cooling and solidifying soap
IPC: C11D13/18
Filed: 1952-11-03
Abstract: 729,833. Extruding soap. PISONI, R. Nov. 3, 1952 [April 26, 1952; Sept. 5, 1952], No. 27609/52. Class 87 (2). Soap is formed into bars by a continuous process wherein hot liquid soap coming from the boiler is displaced through a conduit having cooled walls and the soap so consolidated is forced under pressure through an extrusion conduit from which it emerges in the form of a solid bar. The hot liquid soap is introduced under pressure through an inlet 12 to a channel 13, actuates a revolving drum 6 and a fixed cylinder 2 and is carried round by vanes 8, 9 to an outlet 15 at the end of which is an extrusion die. A housing 1 encloses the cylinder 2 and coolant, e.g. brine, is circulated through the intervening space. Coolant is also circulated in the inside of the revolving drum, entering and leaving a smaller fixed drum 7<1> through holes in the wall thereof. Between the inlet 12 and the outlet 15 is a block 11, slidably mounted and kept in contact with the drum 6 by springs 14 so as to form a seal. The blades 8, 9 are urged against the inside of the cylinder 2 by springs 10. The soap is carried round by the vanes and is cooled and compressed as it traverses the channel 13 and is forced to the extrusion die in the solidified state. A heater 16 slightly melts the surface of the soap bar and facilitates its extrusion. In a modification, Fig. 5, the vanes are designed to suck liquid soap into the channel 13a as well as to force it through the channel, the soap in this case entering at 12a and leaving at 15a. Each vane 17<1> projects from a cylindrical member 17a rotatably seated in the periphery of the revolving drum 6a. An arm 25 projects from each end of a cylinder 17a and is fitted at its other end with a roller 26 which engages in a cam groove 19 in the adjacent end cover of the housing. As the drum 6a revolves the cylinder 17a are rocked by the cam action to cause the vanes 17<1> to take up positions so that a partial vacuum exists behind the vanes as they move away from the inlet 12a. The sliding block 11a, between the inlet and outlet, may be urged against the drum by a screw 18. A mixer may be inserted between the outlet from the casing 1 and the extrusion conduit 15. Soap leaving the casing 1 enters the mixer at 28, Fig. 10, and passes through a series of perforated tubes to the outlet 29 leading to the conduit 15. Tubes 30, 32 are fixed and tubes 31, 33 are rotated or oscillated by a crank 37. The tubes are perforated by radial holes in their sectors which face the passages 28, 29. The holes in the outer tube 30 may be oblong. The soap, as it passes through the tube walls, is divided into small pieces which are intimately mixed. Passages for coolant may be incorporated in the mixer. There may be several apparatuses with a common extrusion outlet. Perforated discs may be used in the mixer instead of tubes.
Patent GB-520428-A (GB)
Title: Improvements in fireproof rubber and its production
IPC: C08L21/00
Filed: 1938-09-22
Abstract: 520,428. Rubber compositions. DUNLOP RUBBER CO., Ltd., TWISS, D. F., KEMP. I., and WARREN, F. W. Sept. 22, 1938, No. 27614. [Class 70] Fireproof rubber compositions formed of rubber, gutta percha, balata &c. mixed with incombustible halogenated organic compounds, are treated so that the action of flame upon them produces a charred mass which resists fusion, by incorporating before or after vulcanization substances which give residues of boric acid or phosphoric acid or fusible heatresistant compounds of these acids or of sulphuric acid. Ammonium borate or disodium hydrogen phosphate may be used. The substances may be added to a vulcanized sponge by impregnating with an aqueous solution and drying.
Patent GB-1390114-A (GB)
Title: Catalysts and their use in catalytic processes for producing acrolein
IPC: H01H1/14
Filed: 1972-06-13
Abstract: 1390114 Olefin oxidation catalysts SUMITOMO CHEMICAL CO Ltd 13 June 1972 [14 June 1971] 27633/72 Heading B1E [Also in Division C2] Oxidation catalyst for use in the preparation of acrolein from propylene and oxygen comprises (a) a catalytically-active composition having the empirical formula: wherein X is one or more of magnesium, manganese and cobalt and Y is one or more of copper, calcium, strontium, zinc, cadmium, tin and lead and wherein a is 12, b is 0.1 to 5, c is 0.1 to 12, d is 0.1 to 12, e is greater than 0 but not more than 1, f is 0 to 5, g is 0 to 12, h is 0.1 to 12 and i, the value of which depends on the number of atoms other other than oxygen present in the composition, usually is 36 to 112 and, optionally, (b) carrier material, for example selected from silica, alumina, titania and silicon carbide, in an amount constituting less than 90 weight per cent, for example from 5 to 90 weight per cent, of the catalyst. The specification gives details relating to the preparation of the catalyst by a generally conventional procedure. Examples relate to catalysts which contain phosphorus (as a component of the catalytically-active composition) and silica (as support material) and wherein constituent (X plus Y) is either Ca or Sr or Zn or Cd or Sn or Pb or Ca+Zn or Zn+Sn or Mg+Zn or Mg+Cu+Zn or Mn+Cu+Zn or Co+Cu+ Zn or Mg+Co+Zn; comparison examples relate to catalyst containing molybdenum, bismuth, iron, nickel, phosphorus, silica (as support material) and either (i) neither thallium nor component X nor component Y or (ii) cobalt but neither thallium nor component Y or (iii) either Ca or Sr or Zn or Cd or Pb or Zn+Cd+ Sn but neither thallium nor component X or (iv) Mg and Cu+Zn but not thallium or (v) thallium but neither component X nor component Y or (vi) thallium and zinc but not component X, the thallium being present in a proportion in excess of that proportion permitted by the empirical formula.
Patent GB-310062-A (GB)
Title: Improvements in or relating to nitrocellulose solutions or compositions
IPC: C08L1/18
Filed: 1927-10-18
Abstract: 310,062. Jenkins, W. J., and Imperial Chemical Industries, Ltd. Oct. 18, 1927. Plastic compositions containing amorphous cellulose.-Nitrocellulose solutions or compositions are prepared by incorporating water wet pigments and water wet nitrocellulose, which contains about 5-60 per cent of water, with a solvent having a boiling point above about 120‹ C. and substantially volatile in air, that is a solvent which will dry off substantially in air from lacquers and enamels at normal temperatures. The wet pigment may be mixed directly with wet nitrocellulose or with a lacquer or the like made from wet nitrocellulose and from which the water has not been removed. Suitable solvents comprise butyl acetate, ethyl lactate and the mono-ethyl ether of ethylene glycol. When the water content of the composition is more than 6 per cent a proportion of solvent of still higher boiling point may be added, for example about 10 per cent of methyl cyclohexanone reckoned on the total bulk. Pigments which may be employed comprise not only the mineral earths and inorganic pigments, but also organic dyestuffs insoluble or substantially insoluble in water. The pigment may be incorporated in the form of a water wet paste with the water wet nitrocellulose on metal rolls in the presence of a plasticizer or linseed oil or other softening agent as described in Specification 309,964, but in the present process the selected solvent is also present and no attempt is made substantially to remove the water. In examples, suitable compositions comprise water wet nitrocellulose, water wet prussian blue, ester gum, tricresyl phosphate, butyl alcohol ethyl acetate toluol and butyl acetate or the mono-ethyl ether of ethylene glycol. In place of ester gum, any suitable natural or synthetic resin may be employed and in place of tricresyl phosphate any suitable plasticizer, such as dibutyl phthalate.
Patent GB-635607-A (GB)
Title: Improvements in or relating to shock absorbers
IPC: B64C25/60
Filed: 1947-10-16
Abstract: 635,607. Hydraulic shock-absorbers. ELECTRO-HYDRAULICS, Ltd., and HOARE, R. G. Oct. 16, 1947, No. 27773. [Class 108 (iii)] In a shock-absorber of the type in which fluid is contained in a deformable chamber within the shock-absorber cylinder, the chamber being in communication with a second chamber through an orifice or orifices which may be valved, and in which the space in the second chamber is spring controlled in such a way that if the first chamber is deformed to force fluid through the orifices into the second chamber, the spring is strained and will, on the removal of the deforming force or part thereof, drive all or part of the fluid back into the first chamber, a third chamber is provided which is also spring controlled and is in ported communication with the second chamber, the arrangement being such that in the event of fluid pressure in the second chamber rising to a predetermined level, further damping is effected by communication between the second and third chambers. In the arrangement shown, a main cylinder is divided into first and second chambers by a fixed diaphragm 6 having a valved damping-orifice 7 and restrictor orifices 8a. A hollow piston-rod 9 slidable in the cylinder constitutes a third chamber and carries a hollow piston 12 to which is attached a hollow counter piston-rod 15 which is slidable through the diaphragm 6 and terminates in an annular type counter piston 16 in the second chamber. The hollow piston-rod 9 comprises spaces 3 and 3a which are formed by a floating piston 23 therein. The piston 16 is provided with one or more ports 17 which establish communication between spaces 2 and 2a formed by the piston in the second chamber. Ports 20 and 21, preferably having spring- loaded valves 20a and 21a in a secondary diaphragm 19 within the piston 12, allow communication between the spaces 2 and 3a. The cylinder including the space 3a is filled with oil to a predetermined level above the piston 16 and compressed air is admitted into spaces 2a and 3. Some oil may be admitted to space 3. In operation, compression of the shock-absorber is resisted initially by oil in the first chamber, due to the damping action of orifices 7, after which damping is reduced due to further compression of oil in space 2. Continued increase in oil pressure in space 2 opens valve 20a in the diaphragm 19 to force piston 23 against the air pressure in space 3. On extension of the shock-absorber oil is forced back to space 2 through valve 21a, by air pressure in space 3. Oil in the second and third chambers may be separated from the air therein by a floating piston or bellows device. The piston-rod 15 may be grooved at 18 over a portion of its length to provide additional communication between each side of the diaphragm 6 during movement of the piston-rod 15. In an alternative construction according to the Provisional Specification, the piston 23 may be attached to the piston-rod 15 so that the piston-rod 15, piston 23, piston 16 and the diaphragm 19 are floating.
Patent GB-519586-A (GB)
Title: Feeder for glass furnaces
IPC: C03B7/098
Filed: 1938-09-23
Abstract: 519,586. Glass manufacture. FERGUSON, J. Sept. 23, 1938, No. 27817. [Class 56] The temperature of glass issuing from a melting furnace is controlled so that it can be cut into gobs of a suitable size and temperature for working independently of the furnace temperature and without the use of a plunger. As shown, the outlet passage 20 can be cooled by feeding fluid through a tubular coil 21 or heated by feeding the coil with high frequency current from a valve oscillator to induce heating currents in the glass and in a metal inset 22 (if provided) in the outlet passage. The issuing glass may be further heated by passing current through it from a transformer 31 between an orifice ring 25 and an electrode in the furnace (e.g., one of the main electrodes). By this means a considerable amount of heat is generated at the surface of the ring. The internal diameter of the ring increases towards the outside and after a gob has been cut the glass recedes momentarily into the enlarged outer part of the ring. Where the ring is of considerable depth it may be made of several insulated' annular portions connected to separate tappings on the transformer. The range of temperature control is preferably sufficient for stopping and restarting the flow. The orifice may be air cooled and only one heating means may be provided. The invention may be applied to systems in which the furnace or passage or both are heated non- electrically. Specification 258,228, [Class 56], is referred to.
Patent GB-1061889-A (GB)
Title: Steam power plant including a forced-flow steam generator having a reheater
IPC: F01K7/24
Filed: 1964-07-06
Abstract: 1,061,889. Forced flow steam boilers. SULZER BROS. Ltd. July 6, 1964 [July 23, 1963], No. 27817/64. Heading F4A. In a steam power plant comprising a forced flow boiler supplying a turbine having a high pressure stage 9 and a low pressure stage 15 with an intermediate stage reheater 5, the boiler plant is started by first pumping water from a feed tank 19 through an economizer 2, an evaporator 3, a superheater 4 and a separator 21 to return to the feed tank 19 through the valve 41. The boiler is fired at 10% of full load rate and the steam that evolves in the separator as pressure reduces through the valve 20 flows through the pipe 42 to the reheater 5 and then to the high pressure turbine 9 via pipe 25, cooling the reheater and warming the high pressure turbine 9, the steam exhausting from the high pressure turbine 9 into the feed tank 19 to de-aerate water entering the tank from the condenser 16. The valve 14 is then opened to warm the low pressure turbine 15 and when the high and low pressure section are adequately warmed the turbine is run-up to speed with the firing still at 10% full load rate. As the steam temperature rises the steam from the superheater 4 is fed directly to the high pressure turbine 9 via pipes 7 and the reheater is fed with expanded steam from the said turbine 9. By reversing the above procedure a rapid shut down time is achieved. In a modification the turbine may be subdivided into three parts with a reheater between the high and medium pressure stages and between the medium and low pressure stages, during starting the latter reheater being connected to the entry to the high pressure or to the medium pressure stage.
Patent GB-655338-A (GB)
Title: Filtering apparatus
Inventor: MILLER GEORGE
IPC: B01D24/22
Filed: 1948-10-26
Abstract: 655,338. Filter-bed tiles. HANKIN & CO., Ltd., F. Oct. 26, 1948, No. 27833. [Class 87(i)] [Also in Group I] A filter bed tile 10 of inverted channel shape e comprises divergent side walls 14 and a bridging wall 13 provided with upstanding filter box 16 having lateral drainage ports 19. The filter box may be divided into compartments 18 by transverse walls 17. Rabbets 22 may be formed at the upper edges of the ends of the tile.
Patent GB-1382021-A (GB)
Title: Prevention of foot rot
IPC: A61K31/08
Filed: 1973-06-12
Abstract: 1382021 Microbiocidal application of paraformaldehyde CELANESE CANADA Ltd 12 June 1973 [12 June 1972] 27904/73 Heading A5E A method of combating foot-rot of livestock (cattle or sheep) comprises spreading an effective amount of paraformaldehyde (e.g. 8 to 20 lbs. per 1000 square feet) over a ground area occupied or frequented by the livestock.
Patent GB-908195-A (GB)
Title: Improvements in and relating to methods and apparatus for machining metal by spark erosion
IPC: B23H1/00
Filed: 1960-08-12
Abstract: 908,195. Electro.erosion. COLE, M. July 18, 1961 [Aug. 12, 1960], No. 27972/60. Class 83 (4). In the machining of a metal workpiece 13 by spark erosion within a dielectric fluid 11, a rotary electrode 14 is used to assist flow of dielectric through the gap, and the energy of the discharges is progressively reduced whereby the machined surface is made progressively flatter and smoother. A brass or tungsten electrode 14 has on its lower surface a plurality of radial grooves 25, Fig. 2 (not shown), and is rotated through a belt drive 19 by an A.C. motor 20. For some purposes when contamination is to be avoided the electrode may be of the same metal as the workpiece. A servomotor 30 responsive to the average voltage in the gap, adjusts the electrode spacing through gearing 17. Direct current is supplied through resistor 23 to charge a capacitor 22. Both the resistance and capacitor may be variable for progressively reducing the spark energy, or they may comprise a plurality of components with selective switching. The potential of the D.C. source may also be variable. Kerosene, light transformer oil or distilled water is used for the dielectric and due to the rotation of the electrode, debris is continuously removed from the gap. The surface of the machined workpiece may be given a light mechanical or electrolytic polishing when metallographic examination is necessary. A specific example is given.
Patent GB-1415694-A (GB)
Title: Attaching sliding clasp fastener stringers to garment material
IPC: A41H37/06
Filed: 1972-06-15
Abstract: 1415694 Sewing LIGHTNING FASTENERS LTD 10 Mav 1973 [15 June 1972] 28072/72 Heading D1G Two unassembled sliding clasp fastener stringers 6 are arranged with the coupling elements 7 facing in the same lateral direction and sewn by a twin-needle sewing machine to two lengths 3, 3a of garment material with the greater width portions of the lengths 3, 3a extending away from one another. As shown the sewing machine is provided with a basically Y-shaped flat tube with legs 8, 9 (Fig. 4) which separates an assembled fastener at C (Fig. 5), crosses over the stringers at I) if the coupling elements are not symmetrically arranged on the stringers and twists one of the strings at E to deliver the two stringers as required for sewing. The edge 12 of one stringer may be turned up to pass through a groove in the lower face of the presser foot 10.
Patent GB-205340-A (GB)
Title: Improved moving advertising apparatus for shop windows
IPC: G09F11/02
Filed: 1923-06-01
Abstract: 205,340. Osborne, R. June 1, 1923. Cylinders, prisms, and like elements, rotating.- Glass panels k bearing advertising matter are detachably mounted by spring-held members m in a rotatable casing a having within its interior a driving motor f, and an illuminating lamp e. Both the motor and the lamp are carried by a platform d suspended from a central spindle b, the motor actuating the drum through a series of pulleys and rubber bands. A brake (not shown) may be pro vided to regulate the speed of the apparatus.