baber/WOPTO huggingface dataset:
Patent GB-535175-A (GB)
Title: Improvements relating to polymerizable compounds
IPC: C08F20/20
Filed: 1939-08-22
Abstract: 535,175. Vinyl polymerization products; acrylic esters. NORTON GRINDING WHEEL CO., Ltd. Aug. 22, 1939, No. 24142. Convention date, Nov. 8, 1938. [A Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 28, 1940.] [Class 2 (iii)] Synthetic resins, suitable for optical purposes, for electrical insulation, and in the manufacture of grinding wheels, are prepared by co-polymerizing by heat and/or light a compound containing the group CH  2  =C = with ethylidene diacrylate or dimethacrylate. The compound containing the group CH  2  =C = may be an ester, amide or halide of acrylic or methacrylic acid, a vinyl aromatic hydrocarbon, a vinyl ester, a vinyl ketone, a vinyl ether or a vinyl aldehyde. A co-polymer of methyl methacrylate with 0.5 per cent. by volume of ethylidene dimethacrylate is harder than polymeric methyl 1 methacrylate but is mouldable under pressure, and a co-polymer of methyl methacrylate with 10 per cent. by volume of ethylidene acrylate or diacrylate is suitable for shaping by cutting or grinding to form optical elements such as lenses. A co-polymer of styrene and ethylidene dimethacrylate may be cast to form an electric insulator. A grinding wheel may be produced by mixing abrasive grain with the monomeric mixture and polymerizing in a mould ; alternatively a co-polymer which is materially softened by heat may be prepared in granular form, mixed with abrasive grain and a plasticizing medium consisting of one of the ingredients of the co-polymer in monomeric form, and the mixture heated in a mould. The optical properties of the resins, e.g. refractive index and/or dispersion value, may be modified by the addition to the monomeric mixture of a further polymerizable substance, e.g. styrene, nitroethylene, triphenyl methyl acrylate or methacrylate, o, m, or pnitrostyrene, vinyl chloride, vinyl acetate or the acrylic and methacrylic acid esters of the hydroxyquinolines, the hydroxydiphenyls, the nitrophenols and the chlorophenols ; a hardness improving agent, e.g. methacrylic acid, allyl methacrylate, ethylene glycol dimethacrylate and other substances having two CH 2 =C = groups per molecule may also be added to the monomeric mixure. Specification 512,806 is referred to. The Specification as open to inspection under Sect. 91, comprises also the preparation of ethylidene diacrylate or dimethacrylate by the action of acetylene on acrylic or methacrylic acid in the presence of a catalyst, e.g. mercuric sulphate or boron trifluoride. In an example, ethylidene dimethacrylates, together with vinyl methacrylate, is prepared by adding methacrylic acid containing pyrogallol as a polymerization inhibitor to mercuric sulphate in glacial acetic acid, and passing acetylene into the heated mixture. The reaction mixture is filtered, extracted with ether and the extract distilled to separate the products. This subjectmatter does not appear in the Specification as accepted.
Patent GB-242412-A (GB)
Title: Improvements in windscreens for use on motor vehicles
IPC: B60J10/02
Filed: 1924-10-13
Abstract: 242,412. Riley, A. Oct. 13, 1924. Wind-screens.-A pillar 2 of a transverse wind-screen 3 has a right-angle strip 4, 6 attached to it and formed of or lined with rubber 5 within which the edge of the side screen is adapted to engage. The flange 4 may be a plain strip and the strip 5 may be spongy rubber as shown, a rubber tube, or an inverted channel. The flange 4 may be formed integral with the rubber strip and be of vulcanized rubber. The rubber strip and rearward flange may be covered with leather.
Patent GB-171772-A (GB)
Title: An improved air purifying apparatus
IPC: F24F3/12
Filed: 1920-08-20
Abstract: 171,772. Porteus, G. Aug. 20, 1920. Air, heating and treating; forced ventilation.- Air is drawn through a purifying apparatus by a fan 7 and passed to a room &c. The purifying apparatus comprises a casing 1 in which wire cages containing porous asbestos material are fitted, one section 10 being sprayed from atomizers 20 with purifying liquid and the upper section 11 serving to dry the air drawn upwardly through the casing by the fan 7. Water is sprayed down the air inlet tube 4 to remove suspended matter. The purified air may be warmed or dried by a steam or hot water coil 29. Liquid collecting in a chamber 3 is circulated by a pump 19, admission of a strong solution from a vessel 21 being controlled by a valve 22. To clean the apparatus, boiling water and steam are admitted through a pipe 27 having an atomizer 28 and discharged through a pipe 14, after which antiseptic from the vessel 25 is introduced with the steam to sterilize the asbestos pieces.
Patent GB-1222237-A (GB)
Title: Resistance welding of copper parts
Inventor: HOEFFLEUR ALBERT
IPC: B23K1/00
Filed: 1968-05-21
Abstract: 1,222,237. Welding by pressure. A. HOEFFLEUR. 21 May, 1968 [23 May, 1967], No. 24218/68. Heading B3R. [Also in Division C7] In resistance welding copper parts, the area to be welded of at least one of the parts is coated, prior to welding, with a paste which comprises either powdered silver solder or powdered silver and a soldering flux. The face of at least one of two copper sheets is coated with the paste, preferably along the whole length of the sheets, and the sheets are pressed together and spot stitch or seam welded using copper electrodes. The paste initially offers a high resistance and the flux prepares the surfaces for welding. The paste may comprise (a) 40 parts silver solder (45% Ag, 18% Cu, 20% Cd, 17% Zn), 60 parts flux (50% rosin, 38% tallow, 12% sal ammoniac); (b) 50 parts silver solder (12% Ag., 45% Cu, 7% Cd, 36% Zn), 50 parts flux (45% rosin, 45% tallow, 10% sal ammoniac); or (c) 25 parts powdered silver, 75 parts flux (55% rosin, 30% tallow, 15% sal ammoniac). In each case up to 20% of the flux may be replaced by an adhesive e.g. polyiso-butylene, polybutadiene, polyvinyl ether, polyvinyl acetate or polyvinyl propionate.
Patent GB-998034-A (GB)
Title: Cross-bottom bag of synthetic plastic foil
IPC: B65D30/18
Filed: 1963-06-18
Abstract: 998,034. Block-bottom bags. K. H. HONSEF. June 18, 1963 [June 29, 1962], No. 24272/63. Heading B8K. The folded-in side flaps 16 . . . 19 (Fig. 5) of a cross-bottom bag of plastics foil do not meet, and the bottom is completed by a closure sheet 8, 8a which may lie either over or under the side flaps. To facilitate welding the closure sheet to the flaps, without welding the bottom of the bag to its walls, the thickness of whichever portion of foil is outermost on the bottom is less than that of the underlying foils. In the arrangement illustrated, the closure sheets 8, 8a are formed by a length of plastics tubing so providing a double thickness for the closure sheet. The bottom sheet may, however, consist of a laminate with the outer layer thinner and having a lower welding temperature. Where the closure sheet overlies the side flaps 16. . . 19 it may be a laminate with a thinner layer adjacent the side flaps. The closure sheet is also welded at 9... 12 to the end portions of the cross bottom. A valve sheet 15 (Fig. 7), may be welded at 13, 14 to the closure sheet 8a before this is placed on the bag bottom.
Patent GB-1339529-A (GB)
Title: Coagulation of plasma
IPC: G01N33/86
Filed: 1972-05-23
Abstract: 1339529 Coagulating plasma SOC GENERALE DE RECHERCHES ET D APPLICATIONS SCIENTIFIQUES 23 May 1972 [26 Oct 1971] 24280/72 Heading B1X A method of effecting coagulation of plasma comprises adding to platelet-free plasma an aqueous solution of cephalin and a watersoluble substantially neutral salt of ellagic acid with an organic base. The base may be diethanolamine, tris(hydroxymethyl)amino methane or N-methyl glucamine. The solution may also contain glucose; a calcium salt may be added to the reaction mixture.
Patent GB-321982-A (GB)
Title: Improvements in or relating to the purification of industrial gases with the recovery of by-products
IPC: C10K1/12
Filed: 1928-08-23
Abstract: 321,982. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). Aug. 23, 1928. Materials for purifying.-Industrial gases are washed with a liquor comprising ammonium polythionate and ammonium thiosulphate and sufficient ammonia completely to absorb hydrogen sulphide and fix the hydrogen cyanide. In most cases the ammonia content of the gas requires supplementing for this purpose and owing to the excess of ammonia which is required to effect the reaction between ammonia and hydrogen sulphide, additional sulphur is also necessary for conversion of all the ammonia into ammonium sulphate. This is preferably supplied in the form of sulphur dioxide during regeneration of the liquor. To obtain ammonium sulphate and thiocyanate the wash liquor is boiled and after filtration from the separated sulphur is subjected to fractional evaporation. Ammonium sulphate is thereby separated almost completely from the ammonium thiocyanate solution. In an example crude coal gas containing 1.2 per cent of ammonia, 0.8 per cent of hydrogen sulphide and 0.1 per cent of hydrogen cyanide is treated with the wash liquor. 0.74 per cent of ammonia and 0.22 per cent of sulphurous acid being added. The two-stage process described in Specification 292,669 may be utilized by removing in the first stage an additional quantity of hydrogen sulphide corresponding to the hydrogen cyanide content of the gas so that the ammonia available in the second stage completely suffices for combining with the remainder of the hydrogen sulphide and the hydrogen cyanide.
Patent GB-1309704-A (GB)
Title: Slurry process for coating particulate material upon a surface
IPC: H01J9/22
Filed: 1971-04-19
Abstract: 1309704 Coated cathode ray tube faceplate R C A CORPORATION 19 April 1971 [2 March 1970] 24317/71 Heading B2E [Also in Division C4] The concave surface of a cathode ray tube face plate is coated with particulate material, e.g. phosphor powder by dispensing a puddle of slurry comprised of the particulate material and mixed with a liquid vehicle on to the central portion of the concave surface while the face plate is rotated about an axis substantially normal to the central portion of the concave surface and at a small angle to the vertical and (a) spreading the slurry to the margin of the face plate by rotating the face plate about the axis and decreasing its speed while tilting the face plate to move the axis away from the vertical, (b) spreading the slurry back to the central portion of the face plate surface by either tilting the face plate to move the axis back towards the vertical and increasing the speed of rotation of the face plate, or by retaining the face plate in its tilted position and decreasing the speed of rotation of the face plate, and (c) again spreading the slurry to the margin of the face plate by either tilting the face plate to move the axis away from the vertical and decreasing the speed of rotation of the face plate, or by retaining the face plate in its tilted position while increasing the speed of rotation of the face plate.
Patent GB-476102-A (GB)
Title: Improvements in or relating to apparatus for steaming, smoothing and shrinking webs of textile material
IPC: D06C7/00
Filed: 1937-09-07
Abstract: The web of fabric to be steamed and smoothed in accordance with the process described in the parent Specification is moistened, in order to shrink it, by wetting the travelling apron h by a wetting device placed in its path in front <PICT:0476102/IV/1> of the part where the fabric k travelling to the drum a comes into contact with it, so that moisture is transferred thereby to the fabric.  The wetting device may comprise a roller 2 dipping into liquid in a trough 3, and intermittently rotated by a pawl 9 and ratchet teeth 8, the pawl being mounted on a lever 5 rotatable on the axle 4 of the roller 2 and having a roller 6 at its free end which is engaged by a cam 7 on the axle of the feed roller i<1>.  Alternatively, the roller 2 may be rotated by friction with the apron h.
Patent GB-640825-A (GB)
Title: A method of and means for protecting thermionic oscillators and amplifiers
IPC: H03F1/54
Filed: 1946-08-16
Abstract: 640,825. Valve-generating circuits. MURPHY RADIO, Ltd., and TOMES, S. R. Aug. 16, 1946, No. 24492. [Class 40 (vi)] In an oscillation generator for supplying loads of different value with high-frequency power, the valves are protected by a circuit which is dependent on the ratio of grid potential to anode potential and comprises a relay C associated with a rectifier 2, 3 which permits current to flow to earth and an oppositely arranged rectifier 1, connected to the anode supply through a resistance R12 of such value that the junction of this resistance and the grid leak R8 is at earth potential when the voltage ratio is a minimum. As shown, this circuit comprises two resistors R12 and R8, connected in series between HT+ and the grids of the valves V3 and V4 biassed by grid current. Current flow from the junction of the resistors R8 and R12 through the relay C closes holding contacts C" and at contacts C<SP>1</SP> operates a cut-out A.
Patent GB-184395-A (GB)
Title: Improvements in and relating to ventilators and the like
IPC: B63J2/10
Filed: 1921-09-15
Abstract: 184,395. McKerrow, F. W. Sept. 15, 1921. Ventilators; valves.-In a ship's ventilator, the shaft b is surrounded by a sleeve valve d running on rollers s and provided with valve faces j, which rest upon valve seats f, h on rings e, g when the valve is closed. The rings e, g are preferably formed of one casting connected by stays i, and secured to the cover-plate a and to the end of the shaft b, respectively. The valve d forms part of a float k, which, when the valve is open, rests by feet m on the bottom l of the float chamber, the side walls n of which are fitted to the cover-plate a and are provided with air openings o. A baffle-wall q is provided in the float chamber, and an outer shield p may be added. In the event of water entering the float chamber, the float k rises and closes the valve d until the water escapes by the drain holes r. A valve t, operated by hand, controls the opening at the end of the shaft b. The float k may be counterweighted and means may be provided to close it by hand. The float may be separate from the sleeve valve, and may take the form of an open-topped vessel provided with drain holes, and be so arranged that water entering the openings o enters the tank and causes it to fall, in which case it is connected to the valve by ropes passing over pulleys. In the form shown, the ventilator is above the deck c, but it may be located below it, with the cover-plate a flush with the deck. In this case the openings o are replaced by a grating round the cover-plate beyond the wall q, which can be closed by a sliding shutter, and a pipe is provided to carry off water from the float chamber.
Patent GB-743815-A (GB)
Title: Improvements in or relating to vices
Inventor: HAMPTON CHARLES WILLIAM
IPC: B25B1/08
Filed: 1953-09-05
Abstract: 743,815. Vices. HAMPTON, Ltd., C. & J. Sept. 3, 1954 [Sept. 5, 1953], No. 24607/53. Class 61. In a vice in which the screw spindle 8 is threaded through a nut 11 in the base carrying the fixed jaw 4, and projects through the sliding jaw 6 where it is provided with a bar 25 by which it is rotated to open and close the sliding jaw, a sleeve 14 slidable on the projecting spindle is pro vided between the jaw 6 and the head 23 of the spindle, the head 23 having a transverse pivot 24 for the bar 25 that has a cam surface bearing on the outer end of the sleeve 14. A spring surrounding the spindle within the sliding jaw urges the jaws apart. One or more plungers are prcvided to engage any of a number of locating recesses in the sleeve 14 in order to retain the bar 25 in desired angular relation to the spindle 8. The construction of the cam, sleeve and plungers is similar to that disclosed in Specification 743816. The base 1 of the vice carries side wings 3 bridged by the fixed jaw 4. The inverted U-slide 5 for the jaw 6 may have an open end 37 as shown, a washer 38 being carried by the end of the spindle to limit the forward movement of the jaw 6 or the slide may be solid at the end, Fig. 8 (not shown).
Patent GB-532404-A (GB)
Title: Improvements relating to electric switch cover plates
IPC: H02G3/14
Filed: 1939-08-28
Abstract: 532,404. Switch covers. JONES, A. V., and ROANOID, Ltd. Aug. 28, 1939, No. 24633. [Class 38 (v)] A flat or flat-edged cover plate for a sunk switch comprises an apertured metal plate 3 to which is united by heat and pressure a non-metallic plastic insulating covering 5, which extends round the back margin of the plate for a short distance, the material comprising a thermo-plastic compound, such as cellulose acetate or synthetic resin, and being applied in a moulding press having die elements for forming the aperture in the material.
Patent GB-443436-A (GB)
Title: Manufacture of condensation products
Filed: 1934-08-27
Abstract: Condensation products are manufactured by heating a product obtainable by the action of an alkylene oxide on ammonia or on an organic compound containing hydroxyl, carboxyl, an amino- or oxyalkylamino-group, with urea, thiourea or guanidine, or a derivative thereof, e.g. diethylurea, isopropylurea or methylguanidine.  The products may be employed as cleansing and foaming agents, as agents for emulsifying fats, waxes and hydrocarbons, as sizes for viscose artificial silk, as assistants for the textile printing industry, e.g. for printing with vat-dyestuffs, as emulsifying and through-dyeing agents for the dyeing industry, and as fungicides and insecticides.  Examples describe the interaction of: (1) monoethanolamine with urea; (2) the reaction product of oleic acid and ethylene oxide with thiourea; (3) the reaction product of ethylene diamine and propylene oxide with guanidine; (4) the reaction product of urea and ethylene oxide with ethylurea; (5) di-(oxypropyl) glycol ether (prepared from glycol and propylene oxide) with methylguanidine; (6) tri-(oxyethyl)-sorbitol (prepared from sorbitol and ethylene oxide) with isopropylurea; (7) the reaction product of ethylene diamine and propylene oxide with urea; (8) the reaction product of urea and ethylene oxide with urea.ALSO:As agents for emulsifying fats, waxes, and hydrocarbons may be employed the products obtained by heating a product obtainable by the action of an alkylene oxide on ammonia or on an organic compound containing hydroxyl, carboxyl, an amino- or oxyalkylamino-group, with urea, thiourea or guanidine, or a derivative thereof.
Patent GB-870519-A (GB)
Title: Improvements relating to wide-angle objective lens
IPC: G02B13/04
Filed: 1958-07-31
Abstract: 870,519. Wide-angle objective lens. NEDERLANDSE ORGANISATIE VOOR TOEGEPAST NATUURWETENSCHAPPELIJK ONDERZOEK TEN BEHOEVE VAN DE RIJKSVERDEDIGING. July 31, 1958 [Aug. 7, 1957], No. 24745/58. Class 97(1) A wide objective lens comprises a field compresser system in front of a stop and a positive lens system behind, the latter system comprising, in order from the front, (a) a positive doublet consisting of a biconcave and a biconvex part cemented together, spaced at a distance 0.04f<SP>1</SP>-0.16f<SP>1</SP> (f<SP>1</SP> is the equivalent focal length) from the stop, (b) a positive biconvex lens, (c) a triplet lens consisting of a biconcave, a concave-convex and a biconvex part cemented together, and (d) a positive biconvex lens having a focal length of 9f<SP>1</SP>-13f<SP>1</SP>, the axial thickness of the triplet lens being between 0.8f<SP>1</SP> and 1.80f<SP>1</SP>; the former system comprising at least two negative menisci having semi-spherical concentric back surfaces the centre of which being in the centre of the stop. A detailed example is given in which the second positive lens of the positive system comprises two elements cemented together, the AbbÚ number of the biconvex part of (a) is 1.3 - 2.5 times that of the biconcave part and the axial distance between (b) and (c) is 0.35-0.75f.
Patent GB-505430-A (GB)
Title: A new or improved process for the disintegration and pulverisation of wheat or other cereals and apparatus therefor
IPC: B02C4/24
Filed: 1937-09-10
Abstract: 505,430. Abrading cereals. TUNMER, N. G. Sept. 10, 1937, No. 24757. [Class 59] Cereals &c. are ground by an abrasive action by a moving body against which the grains are fed by a gravitational movement, means being provided whereby the flour can pass out of contact with the abrasive surface. As shown a roller 1 covered with an abrasive surface 2 is mounted in a container 6 and adjustable side plates 5a, 4a on the side walls are arranged to provide a small gap with the periphery of the roll through which the material, ground by the surface of the roll, passes to a discharge hopper 7. The material may be fed continuously or may be ground in batches. The material may be ground on opposite sides of a disc or on a plate or belt. The weight of the material may be such as to allow a circulation of the grains about the abrading surface. The speed of the surface may be constant or have a periodic or aperiodic variation.
Patent GB-1460231-A (GB)
Title: Semi-rotary piston power unit
IPC: F01C9/00
Filed: 1975-06-10
Abstract: 1460231 Semi-rotary piston machines  R JAMES 10 June 1975 [10 June 1974] 24852/75 Heading F1F A semi-rotary I.C. engine has two curved pistons 15, 16 which oscillate on a shaft 10 and two crankshafts 22, 23 connected to the pistons so that piston 16 uncovers an exhaust port 14 before the piston 15 uncovers an inlet port 13. In one arrangement the cranks 22, 23 are in phase and gudgeon pin 32 is nearer the shaft 10 than gudgeon pin 31. In a modification the pins 31, 32 are equally spaced from the shaft 10 and the crank 28 is ahead of crank 27; and in a further arrangement the throw of crank 28 is greater than that of crank 27. The two crank-shafts carry meshing synchronizing gears 24, 25.
Patent GB-1025624-A (GB)
Title: Electronic temperature regulators
IPC: G05D23/30
Filed: 1963-06-21
Abstract: 1,025,624. Automatic temperature control. R. ROHLF. June 21,1963 [June 22, 1962], No. 24901/63. Heading G3R. An automatic temperature control system comprises a bridge network which includes a variable resistor P1 by means of which a desired temperature may be selected and a resistance thermometer Th which measures the temperature of the controlled apparatus, the bridge output being used to control a two state (ON-OFF) amplifier comprising two transistors T1, T2 subsequently controlling an output stage transistor so as to control the energization of a relay rel. 1 which, by way of its normally open contact, controls the apparatus heating circuit and thus the heating of an element H associated with a negative temperature coefficient resistor Tr connected, in parallel with a fixed resistor R 1 , in a further arm of the bridge, the resistor Tr functioning to bias the bridge to a higher than normal value thus providing the system with a measure of "anticipation". A connection GK from the bridge output to the base of the output transistor T3 provides a safety device in the event of a short circuit of the resistance thermometer Th. A further output stage comprising a fourth transistor and a second relay r.e.1. 2, together with a variable resistor P 2 , may be provided to follow the first output stage, the resistor P 2  being connected in series with the resistor Th. Thus should the apparatus reach a selectable critical value the further output stage becomes operative, for example, to provide an alarm or operate a cooling system.