baber/WOPTO huggingface dataset:
Patent GB-1216100-A (GB)
Title: Production of urea and melamine
IPC: C07C273/12
Filed: 1968-07-10
Abstract: 1,216,100. Production of urea and melamine. MITSUI TOATSU CHEMICALS Inc. 10 July, 1968 [19 July, 1967], No. 33001/68. Heading C2C. Urea and melamine are obtained in a process comprising reacting ammonia with CO 2  at a urea-forming temperature and pressure in a urea-synthesis zone, expanding and passing the resulting urea-synthesis effluent through a highpressure distillation zone kept at a head temperature of 90-130‹ C. and a still temperature of 130-170‹ C. under a gauge pressure of 10- 30 kg/cm.<SP>2</SP>, and then through a low-pressure distillation zone kept at a pressure lower than that of the said high-pressure distillation zone to separate in each stage unreacted ammonium carbamate as a gaseous mixture of ammonia, carbon dioxide and water vapour, thereby obtaining urea, at least a part of the urea being heated in the presence of ammonia and a catalyst, the resulting gaseous reaction product comprising melamine, ammonia and CO 2  being cooled with, as coolant, water or an aqueous solution of NH 3 , ammonium carbamate, or ammonium carbamate and melamine to separate melamine and, concurrently, to form an aqueous solution containing by-produced ammonia and CO 2  as ammonium carbamate, the aqueous solution of ammonium carbamate being subjected to distillation at a gauge pressure of 3-10 kg/cm.<SP>2</SP> to separate a gaseous mixture of ammonia, CO 2  and water vapour, the gaseous mixture separated from the said aqueous solution of ammonium carbamate and the gaseous mixtures separated by the said lowpressure distillation and the said high-pressure distillation from the said urea-synthesis effluent being recovered and recirculated to the said urea-synthesis zone, wherein there is absorbed in a medium pressure absorption column at a gauge pressure of 3 to 10 kg/cm.<SP>2</SP> the said gaseous mixture, by-produced in producing melamine, into the ammonium carbamate solution obtained by absorbing into an absorbent the said gaseous mixture separated in the low-pressure distillation zone to form a first absorbate, the pressure of the said first absorbate is increased, a part of the said first absorbate having the pressure increased is introduced into the said high-pressure distillation zone thereby the ammonium carbamate contained therein is decomposed together with the ammonium carbamate in the said urea-synthesis effluent to form a single gaseous mixture of NH 3 , CO 2  and water vapour and the thus separated gaseous mixture is absorbed into the remaining part of the said first absorbate in a high-pressur absorption column to form a second absorbate for recirculation to the said urea-synthesis zone. The absorbent employed may be water, an aqueous ammonia solution or an aqueous urea solution and the amount of the first absorbate which is introduced into the high-pressure distillation column may be varied depending on the composition of said first absorbate.
Patent GB-1472317-A (GB)
Title: Conveyors
IPC: B65G23/44
Filed: 1974-07-26
Abstract: 1472317 Tensioning conveyers R D JONES and J L HALL 26 July 1974 [21 Jan 1974] 33021/74 Heading B8A In a conveyer comprising a cable 13 carrying scrapers 14 for conveying material through a tube 12, the cable is trained round a pulley 17 biased by a spring 32 and means are provided to adjust the position of the pulley 17 and the spring 32 to vary the tension of the cable 11. As shown, the pulley 17 is mounted on a member 24 slidable on rods 26, 27 carried by ears 29, 31 of a bracket 28, the spring 32 acting beween the bracket 28 and the member 24. The bracket 28 is carried by rods 33, 34, the latter being threaded for adjusting the position of the bracket 28. A switch 19 carried by the bracket 28 has a button 37 which is pressed by a button 39 on the member 24 to stop a drive wheel 15 when the cable 11 is slack. The drive wheel 15 is positioned between two ends 42, 44 of the tube 12 and above a tray 20. Material falling from the end 42 and the cable 11 collects in the tray 20 and is carried into the end 44.
Patent GB-1495847-A (GB)
Title: Frequency stabilized laser
IPC: H01S3/139
Filed: 1975-08-07
Abstract: 1495847 Detecting frequency drift of laser HUGHES AIRCRAFT CO 7 Aug 1975 [16 Sept 1974] 33022/75 Heading G1A [Also in Divisions G2 and H1] A laser is frequency stabilized by a feedback system which includes one or more D.C. biased stark-effect absorption cells to detect frequency drift. In Fig. 1 a CO 2  laser 10 has resonator mirrors 14, 16 external of a laser tube 12, tuning stabilization being effected by an electro-  mechanical transducer 18 energized from an amplifier 48 in an error correcting feedback system. Output monitoring is effected by passing a part of the laser output 20 through a partially transmitting mirror 22 to a stark-effect absorption cell 28, the cell consisting of a glass tube terminated by NaCl windows 30, 32 and containing NH 2  D gas. A D.C. bias potential from a source 38 is applied to stainless steel electrodes 34, 36 within the cell to tune its absorption resonance to the required laser output wavelength, e.g. 10À6Á. Additionally the bias is modulated by a reference oscillator 40 so that a photo-detector 44 in the path of beam 42 from the cell can indicate any change of laser output wavelength in terms of phase and amplitude of the modulation. The photo-detector may be a Hg Cd Te photodiode. Detection of frequency drift is obtained by comparing the photo-detector and oscillator outputs at a phase sensitive detector 46, any error signal produced being applied to the D.C. amplifier 48 in the feedback path. In a modification, Fig. 4 (not shown), the photo-detector is replaced by a pressure sensitive microphone 149 in the Stark effect cell 128 which detects pressure waves produced by gas heating. An alternative frequency stabilizing arrangement, Fig. 5, uses two Stark-effect cells 228a, 228b which are individually and differently biased by D.C. sources 238a, 238b so as to have respective absorption resonances on opposite sides of the required laser output wavelength. The radiation passed by each cell is detected by a respective photo-detector 244a, 244b, any frequency deviation of the laser being denoted by a difference in signals from the two photo-detectors which is detected by a differential amplifier 288.
Patent GB-183773-A (GB)
Title: Improvements in or relating to handbags and the like
IPC: A45C13/04
Filed: 1921-12-09
Abstract: 183,773. Dunhill, A. Dec. 9, 1921. Bags.-A vanity bag, suit case, &c. is fitted with an electric lamp which is switched on when the bag is opened. As shown, the lamp e is fitted above a suspended mirror d and is connected to a dry battery f through contacts h, i, which are kept apart when the bag is closed by a projection g on the frame a. During the daytime the contacts may be kept apart by a pin k operated by an external knob. Specification 116,830 is referred to.
Patent GB-1023340-A (GB)
Title: Improved photopolymerisable elements and their production
IPC: C08F2/46
Filed: 1963-08-21
Abstract: 1,023,340. Photopolymerisable materials. E.I.DU PONT DE NEMOURS & CO. Aug. 21, 1963 [Aug. 21, 1962], No. 33135/63. Heading G2C. Improved photopolymerisable materials are prepared by treating the surface of a photopolymerisable layer 5 to 250 mils thick with an oxidising compound, the layer containing an addition polymerisable ethylenically unsaturated compound, a photoinitiator for such a compound and as a binder, a polymer. Specified oxidising compounds are hydrogen calcium or zinc peroxide, sodium hypochlorate, sodium perborate potassium peroxymonosulphate and urea peroxide which are applied to the layer in aqueous solutions. On image-wise exposure of the material and subsequent removal of the unhardened areas, the resultent resist is stated to give better reproduction of line and half-tone images. The photopolymerisable materials used are those of Specifications 741,294, 815,277 and 905,070.
Patent GB-191258-A (GB)
Title: Improvements in or in connection with tip-up and other chairs and seats having metal frames
IPC: A47B91/10
Filed: 1921-12-10
Abstract: 191,258. Caley, E. C., Rodmell, H., and Wray, C. C. Dec. 10, 1921. Seat adjustments; fixing furniture to floors.-Relates to means for adjusting the inclination with relation to the floor of tip-up or other chairs or seats having metal frames or sides. As shown in Figs. 1 and 2, the frame A is formed with a forked bottom, the front limb a of which is pivoted to or between the upright or uprights b of a plate B fixed to the floor, while the back limb a<1> is adjustably fixed to or between the upright or uprights b<1> at the rear end of the plate B. The uprights are provided with slots b<3> and have one side serrated, corresponding serrations being provided on a washer E, so that the frame A is securely fixed by a bolt F passing through the washer E, upright b<1> and limb a<1>. In the modification shown in Fig. 4, the washer E is dispensed with, the engaging serrations being formed on the upright b' and the limb a<1>. When two uprights b<1> are formed in the plate B, the bolt F presses the serrations into engagement with the serrations on the limb a<1> between the uprights. The slots b<3> may be provided in the limb a<1> instead of in the uprights.
Patent GB-1439460-A (GB)
Title: Tamperproof closures for containers
IPC: B65D41/34
Filed: 1972-07-19
Abstract: 1439460 Tamper-proof closures PARSONS BROS Ltd 19 June 1973 [19 July 1972] 33673/72 Heading B8T [Also in Division B6] A tamper-proof closure, comprising a cap 16 and a catch ring 18 having a plurality of tabs 36 located adjacent weakened portions 30, is used for closing a container 14 which has one or more teeth or recesses 21 enabling projections 28 on the inner-side-wall of the catch ring 18 to become locked when the cap is screwed on along with the ring 18. In this position the projections extend through spaces 26 between lugs 24 on the cap 16, and a rib 37 on the ring engages grooves 24A. The cap, ring and container may be of plastics material or of metal, e.g. tin plate. To take the closure off the container 14 the catch ring 18 is removed by pulling the tab 36, thereby breaking the weakened portion 30 and allowing the cap 16 to be unscrewed.
Patent GB-364746-A (GB)
Title: Improvements in or relating to the treatment of water for steam boilers
IPC: C02F5/08
Filed: 1930-11-08
Abstract: Boiler water is maintained within the desired limits of alkalinity to prevent corrosion and the calcium and/or magnesium are precipitated as non-adherent sludge, by the addition of a chemical containing a molecularly dehydrated radical which under working conditions is converted into a condition of greater alkali-neutralizing capacity. Such compounds may be metaphosphoric or pyrophosphoric acids, metaphosphates or pyrophosphates, or the corresponding arsenates. Under working conditions, these compounds which have a greater alkali-neutralizing capacity.  Deposition of calcium pyrophosphates or metaphosphates is not liable to occur in the feed water owing to their solubility, but conversion into orthophosphate and precipitation as such in the economizer may be retarded by adding cutch, quebracho extract or similar tannin body, citrates, lactates, gallates, alginates or gelatine. Conversion into orthophosphate is a time reaction, and the treated water may be passed into the boiler with sufficient rapidity to prevent deposition in the feed lines. The boiler water may be subjected to a preliminary treatment with lime-soda ash or zeolite to remove part of the scale-forming substances.
Patent GB-497252-A (GB)
Title: Improvements in and relating to a process for bookbinding and machines therefor
IPC: B65H45/30
Filed: 1937-12-06
Abstract: 497,252. Cutting paper sheets. HIROHASHI, T., and TAIPUSHOJI KABUSHIKI KAISHA. Dec. 6, 1937, No. 33757. [Class 31 (i)] [Also in Group XV] A bookbinding process consists in making spaced series of serrate cuts through a number of sheets of paper to produce intermeshing teeth or tongues, folding the sheets into a signature along the centre line of the series of cuts, gathering a number of signatures thus prepared into book form and glueing the teeth on the back of the book together, the bookbinding then being completed in known manner. A machine is provided for forming the serrate cuts and folding the sheets into signatures. As shown, the sheets, after being cut, are folded so that the serrations or teeth 5 of one half and those 6 of the other half are arranged alternately. A number of such signatures are gathered together and glued at the serrations on the back. The cutting and folding machine for the signatures comprises a frame 7, a guide 8 (not shown), secured thereon a cutter carrier 9 adapted intermittently to reciprocate vertically on the guide 8, and dies 35 which cooperate with cutters 11 on the carrier 9. The cutters 11 are detachably secured in spaced relationship on the carrier 9, and a folder 13 provided with a number of spaced folding- tongues 13<1> arranged between the cutters is also detachably secured to the carrier. The dies 35 are secured on a carrier 36 which is reciprocated horizontally in timed relationship with the carrier 9 by means comprising a pin 40 on the carrier 36 engaging in a slot in one end of a pivoted lever 37, the other end of the lever engaging in a stepped slot 41 in a plate 42 secured to the carrier 9. Beneath the cutter dies 35 are two constantly rotating shafts 49 on which are a number of delivery rollers 48, the bearings 50 of the shafts being resiliently pressed together. In operation, a number of superposed sheets is placed on spaced horizontal supporting plates 65, 6(i (the plate 66 not being shown), and the carrier 9 is made to descend against the action of a spring by depressing a foot-pedal 26 which controls a one-revolution clutch, whereby an eccentric 16 is driven one complete revolution by a constantly rotating shaft 15, the eccentric being connected by means of a strap 17 and rod 18 to the carrier 9. The cutters 11 co-operate with the dies 35 to form a series of serrate cuts in the sheets, the dies are then retracted by the lever 37, and on the carrier 9 continuing its downward movement the folding- tongues 13<1> fold the sheets into the bite of the delivery rollers 48. The shafts 49 of the delivery rollers 48 are geared together, and one of them is driven from the shaft 15 by means of a belt and a pulley arrangement.
Patent GB-866704-A (GB)
Title: Improvements in or relating to a device for developing photographic negatives
IPC: G03D3/06
Filed: 1959-10-06
Abstract: 866,704. Developing tanks. ZINDLER, W., [trading as LUMOPRINT ZINDLER KOMM.- GES.]. Oct. 6, 1959 [Oct. 10, 1958; Aug. 20, 1959], No. 33811/59. Class 98(2) A bath 12 for holding developing liquid is mounted above a supply container 1, the liquid being pumped up from the container to the bath through a duct, and returned (by siphon action) when the pump is stopped. The bath is in a housing 2 which stands on the container 1, separated from it by feet 21, 22 to allow circulation of cooling air. The liquid is driven up through duct 10 by a gear pump 7, and is carried down into a sump 13 in the bath 12. An overflow duct 15 maintains the liquid at a constant level. When the apparatus is no longer required, the pump is switched off, and the feed duct then acts as a siphon, the liquid in the bath flowing back into the container 1. The container is formed with a removable frame 6, to facilitate cleaning and repairs. In the modification of Fig. 3 (not shown), the bath is supported on a work table, below which is the supply container. The duct conveying the liquid to the bath passes round the outside of the container. The pump is placed in this duct, so that the liquid actually passes through the pump. The liquid in the container has a floating cover of cellular rubber or PVC, to protect the liquid surface from contamination. Instead of this cover, a number of hollow plastic balls may be provided, which float on the surface.
Patent GB-1212174-A (GB)
Title: Process for the production of new 2-oxo-1,2-dihydroquinoline derivatives
Inventor: BEYERLE RUDI
IPC: A61K31/47
Filed: 1969-07-04
Abstract: 1,212,174. Quinoline derivatives. CASSELLA FARBWERKE MAINKUR A.G. 4 July, 1969 [5 July, 1968], No. 33860/69. Heading C2C. Novel compounds I in which R is H or 1-4 C alkyl ; R 1  is H, 1-4 C alkyl, alkenyl, aralkyl, aryl or dialkylamino, wherein the alkyl groups may be linked together directly or via a hetero atom to form a 5-7 membered ring with the N; R 2  is H, 1-4 C alkyl or aryl; R 3  is 1-4 C alkoxy; X is H, halo or 1-4 C alkyl; m is 1, 2 or 3; A 1  and A 2  are straight or branched 2-4 C alkylene and Y is H, OH or are prepared (1) by reacting a compound III with a compound IV or a functional derivative thereof (2) by reacting a compound V with a compound VI or (3) by reacting a compound VII with a compound VIII Intermediates isolated are compounds of Formulµ III and V, 2-oxo-3-R 1 -4-R 2 -7-(γ- chloro - propoxy) - 8 - X - 1,2 - dihydroquinolines and 2-oxo-3-R 1 -4-R 2 -7-(2<SP>1</SP>,3<SP>1</SP>-epoxypropoxy)-8X- 1,2-dihydro-quinolines. Pharmaceutical, compositions comprise a compound I in admixture with a suitable carrier or diluent, are administered orally and parenterally and are used as coronary dilators.
Patent GB-185689-A (GB)
Title: Improvements in or relating to gas fires
IPC: F24H7/00
Filed: 1921-12-16
Abstract: 185,689. Danin, J. Dec. 16, 1921. Gas-fires; dampers; baffles; covers.-In incandescent gas-fires of the type in which the combustion products pass through passages in a heat-storing chamber on their way to the flue, a flue damper is connected to the gas cock so as to be closed to conserve the heat when the gas is shut off. In the stove shown the combustion products, after heating the radiants d, pass through zigzag passages in refractory material b in which heat is stored. The pivoted flue damper k is connected by a rod n to the gas-cock m, both being simultaneously operated by the handle o. In order further to conserve the heat, a panel p may enclose the front of the stove when the gas is extinguished. The heat-storing chamber may be situated above the stove, and in a modification consists of a more or less solid block with transverse passages for the gases.
Patent GB-860246-A (GB)
Title: Improvements in or relating to electric circuit interrupters
IPC: H01H33/56
Filed: 1958-10-23
Abstract: 860,246. Gas-blast switches; hydraulic actuation of switches. WESTINGHOUSE ELECTRIC CORPORATION. Oct. 23, 1958 [Oct. 30, 1957], No. 33938/58. Class 38 (5). In a high-voltage switch having hydraulic operating mechanism, the operating cylinder and piston of the mechanism and an hydraulic accumulator are arranged to be at the same potential as the moving switch contact. Fig. 3 shows part of a double-break gas-blast switch in which each break includes a moving contact 28 and an orifice member 33 carried by a cylinder 34 movable about a fixed piston 41 and connected by a rod 44 to an operating piston 47 of the hydraulic mechanism. When the contacts 11, 28 are closed, the spaces 51, 52 on both sides of the piston 47 are connected to the hydraulic accumulator 56, Fig. 4, the differential action of the piston maintaining the contacts closed. To open the contacts, a coil 77 is energized to release a latch 78 so that a spring 73 moves the valve element 72 of a pilot valve 71 to the position shown in Fig. 4. Oil under pressure is then supplied to the space below a plunger piston 76 which raises a sleeve valve 80 from the position shown to shut off the supply of oil from the accumulator 56 to the space 51 and to connect this space to a sump 8. The resulting reduction in pressure in space 51 permits the pressure oil in the space 52 to move the piston 47 to open the contacts 11, 28, the movement of the cylinder 34 about the piston 41 causing a blast of gas to flow through the orifice 33. Reclosure of the contacts 11, 28 is effected by energizing a coil 86 which resets and relatches the pilot valve element 72 in the position in which it connects the pipe 75 to the sump 8. The spring 90 then moves the sleeve valve 80 down to disconnect the space 51 from the sump 8 and connect it to the accumulator 56. The oil pressure is then restored to the space 51 and by acting on the larger effective face of the piston 47 closes the contacts. Manually-operable valves 118, 119 are provided to enable the moving contacts to be "inched" for maintenance purposes. The gas in the interrupter chambers 22 and the supporting insulating column 5 and above the oil in the sump 8 may be sulphur hexafluoride at a pressure of 60 lb./sq. inch. The contacts may be shunted by impedances 104. In the modified arrangement of Fig. 5 contacts 152, 153 are arranged in series with the shunt impedances 164, each movable contact 153 having an associated piston 156 and orifice member 153<SP>1</SP> to provide a gas blast when the contacts are opened by a piston 154. This piston moves in a cylinder 155 which is connected to the hydraulic system in the same way as the operating cylinders 128 for the main moving contacts 131, restrictions in pipes 199 causing the opening of the contacts 152, 153 to occur after that of the main contacts 131, 132. Specifications 736,090 and 860,245 are referred to.
Patent GB-1508460-A (GB)
Title: Manufacture of diethylenetriamine and triethylenetetramine from ethylenediamine
IPC: C07C209/22
Filed: 1975-08-15
Abstract: 1508460 Diethylene triamine and triethylenetetramine BASF AG 15 Aug 1975 [16 Aug 1974] 34018/75 Heading C2C Diethylenetriamine and triethylene tetramine are made by the self condensation of ethylene diamine with elimination of ammonia at 100- 150‹ C. in the presence of Fe, Co, Ni, Ru, Rh, Pd, Os, Ir or Pt and possibly another metal, e.g. Cu. Preferably reaction is effected under a hydrogen pressure of from atmospheric to 250 bars.
Patent GB-372703-A (GB)
Title: Improved gripping appliance particularly for withdrawing h section steel mine roof supports
IPC: E21D15/60
Filed: 1931-12-09
Abstract: 372,703. Lifting-dogs &c. BROOMHEAD, R. G., 63, Skellow Road, Carcroft, Doncaster. Dec. 9, 1931, No. 34111. [Class 78 (iv).] A gripping device, particularly for withdrawing H-section mine roof supports, comprises jaws a, b pivoted on a pin d of a shackle c engaging slots f The jaws -are opened by pushing the pin in the direction of the arrow 1 and, when inserted behind a flange of the support, may be closed so as to grip the support by pulling the shackle in the reverse direction by a chain connected thereto.
Patent GB-189364-A (GB)
Title: An improved spring wheel
IPC: B60B9/00
Filed: 1921-12-20
Abstract: 189,364. Brain, T. Dec. 20, 1921. Spring wheels. - Two wheels of the type in which the outer wheel is connected by spokes to an inner ring which slides between discs carried by the wheel hub, a single convolute spring 11 encircles the hub 1 and is held between discs 2 formed on the wheel hub. The spring 11 is of flat section, fitting closely between the discs 2 with its outer coil engaging the inner face of the inner ring 8.
Patent GB-780153-A (GB)
Title: Improvements in fuel injectors for internal combustion engines
IPC: F02M61/10
Filed: 1955-11-30
Abstract: 780,153. Fuel injectors. TESSIER, G. Nov. 30, 1955 [Dec. 21, 1954], No. 34261/55. Class 7(3) In a fuel injector having a spring- loaded valve 2 lifted by the fuel pressure acting upon a piston portion 3, the cylinder in which the piston 3 slides is free of contact with the injector body along a major portion of its length and is carried by the upper flanged end 1b of the nozzle member 1 in which the valve 2 is received with substantial clearance, the upper face of the flange 1b being provided with an annular groove 1c which registers with a fuel supply passage 15 in the body member 6 and is connected with the space around the valve 2 by a plurality of equally spaced oblique passages 1d. The valve 2 is loaded by a spring acting through disc 8, a fuel leakage escape passage 11 being provided in a guide rod 10 for the spring 7. A fuel filter 13 is provided in the inlet passage 12.