baber/WOPTO huggingface dataset:
Patent GB-892139-A (GB)
Title: Process for manufacturing pure aromatic substances from industrial hydrocarbon mixtures
IPC: C10G21/20
Filed: 1958-10-17
Abstract: <PICT:0892139/III/1> Aromatic hydrocarbons are separated from industrial hydrocarbon mixtures containing them by extracting the mixture with aqueous formamide or its N-alkyl derivatives and then separating the aromatic hydrocarbons from the extract solution by distillation at reduced pressure.  Distillation is preferably carried out at a pressure of 100-400 Torr and a temperature of 40 DEG -130 DEG C.  In a preferred embodiment, the extract solution obtained in the extraction of a benzene or petrol consisting of 75,7 parts of monomethyl formamide, 8,5 parts of water and 15,8 parts of benzene, toluene and xylene flows through pipe 1 via preheater 2 to distillation column 3 where the aromatic hydrocarbons are distilled off with the greater part of the water at a pressure of p  150 Torr produced by means of a steam jet blower 4 and at a temperature of 120 DEG C. while the monomethyl formamide is drawn off at the end of the evaporator 5 through the pipe 6.  The escaping vapours are liquefied in the water cooled condenser 7 and are conveyed to the container 9 via the pipe 8.  Uncondensed vapours are conveyed into the secondary condenser 10 and flow as a liquid through pipe 11 to the container 9. The distillate consists of 7,8 Kg/hour of aromatic hydrocarbons and 3,7 Kgs/hour of water, and the sump product consists of 38,5 Kg/hour of monomethyl formamide with 1,6% of water and 0,15% of aromatic hydrocarbons.ALSO:Aromatic hydrocarbons are separated from industrial hydrocarbon mixtures containing them by extracting the mixture with aqueous formamide or its N-alkyl derivatives and then separating the aromatic hydrocarbons from the extract solution by distillation at reduced pressure.  Distillation is preferably carried out at a pressure of 100-400 Torr and a temperature of <FORM:0892139/IV (b)/1> p  40 DEG C.-130 DEG C.  In a preferred embodiment, the extract solution obtained in the extraction of a benzine or petrol consisting of 75.7 parts of monomethyl formamide, 8.5 parts of water and 15.8 parts of benzene, toluene and xylene flows through pipe 1 via preheater 2 to distillation column 3 where the aromatic hydrocarbons are distilled off with the greater part of the water at a pressure of 150 Torr produced by means of a steam jet blower 4 and at a temperature of 120 DEG C. while the monomethyl formamide is drawn off at the end of the evaporator 5 through the pipe 6.  The escaping vapours are liquefied in the water cooled condenser 7 and are conveyed to the container 9 via the pipe 8.  Uncondensed vapours are conveyed into the secondary condenser 10 and flow as a liquid through pipe 11 to the container 9.  The distillate consists of 7.8 Kg/hour of aromatic hydrocarbons and 3.7 Kgs/hour of water, and the sump product consists of 38.5Kg/hour of monomethyl formamide with 1.6% of water and 0.15% of aromatic hydrocarbons.
Patent GB-207051-A (GB)
Title: Improvements in tie-presses
IPC: A47G25/78
Filed: 1922-12-05
Abstract: 207,051. Snell, E., and Snell, H. Dec. 5, 1922. Presses. - A multiple tie-press comprises a series of pressure plates 1 mounted on vertical rods 2 and pressed together by nuts 4. Springs 5 are interposed between the plates so that a tie 7, folded on a card 7<1>, may be inserted or withdrawn whilst other ties in the preas are still under pressure. The press is mounted in a box 8 which has ends 9 hinged to the base 3 to give ready access to the press and a lid 10 provided with pads 12, as for tie pins, and a compartment 15 for loose articles such as studs, trinkets, &c. The ends 9 are held in place by the lid, or the latter may be closed and locked with the ends in open position.
Patent GB-192871-A (GB)
Title: An improved device for attaching handles to brooms, brushes and other similar articles
IPC: B25G3/12
Filed: 1921-12-12
Abstract: 192,871. Davies, E. Dec. 12. 1921. No Patent granted (Sealing fee not paid). Fixing by detachable sockets with locking and securing devices.-A device for attaching the handle to a broom, brush or the like, comprises a plate a formed for attachment, to the stock a', and a socket b for the handle c having clamping lugs d and bolt e, the part connecting the plate and socket being formed with strengthening ribs h, and the socket being formed with longitudinal corrugations i to grip the handle and prevent rotation. The corrugations i may be cut or formed in the thickness of the metal as shown in Fig. 4, or they may be stamped by bending the full thickness of the metal.
Patent GB-1526645-A (GB)
Title: Intrauterine contraceptive device
IPC: A61F6/14
Filed: 1977-08-09
Abstract: 1526645 Intrauterine contraceptive INTERNATIONAL PROJECTS ASSISTANCE SERVICES INC 9 Aug 1977 [10 Aug 1976] 33337/77 Heading A5R An intrauterine contraceptive comprises a stem 11 connected at its upper end to the mid-point of a resilient, bowed cross bar 12 which curves downwardly from its mid point to ends which are each continued downwardly and inwardly towards the stem by a respective resilient arm 13, 14. The arms stop short of the stem but have axes which when extended form an included angle of 40-70 with the stem. The arms may be displaced 10 in opposite directions from a plane containing the stem and cross bar and may end in flat fins 16. The upper end of the stem may be 4.0- 6.0 mm, the stem length may be 20 mm and the cross bar may span 30 mm with a curvature of 30 mm.
Patent GB-924470-A (GB)
Title: Improvements in or relating to transistor circuits
IPC: H05B39/09
Filed: 1959-10-01
Abstract: 924,470. Photo-electric control systems. R. E. DIETZ CO. Oct. 1, 1959 [June 2, 1959], No. 33342/59. Class 40 (3). [Also in Group XL (c)] A transistor circuit for energizing a flashing warning lamp and comprising two reciprocally coupled transistors of opposite conductivity types so arranged as to become alternately both conducting and both non-conducting to cause the lamp 16 to flash, also incorporates a selenium photo-cell 44 which during daylight hours absorbs the current flowing from the junction of resistors 32, 34 towards the base of transistor 20 so maintaining the transistor cut-off and preventing the lamp from flashing. Specification 884,301 is referred to. Reference has been directed by the Comptroller to Specification 801,453.
Patent GB-466719-A (GB)
Title: Improvements in and relating to dynamo electric machines
IPC: H02K19/14
Filed: 1935-12-02
Abstract: 466,719. Motors. BRITISH THOMSONHOUSTON CO., Ltd., and HOLLAND, W. R. Dec. 2, 1935, No. 33372. [Class 35] A motor provided with a polyphase armature winding and two field-windings, viz.: a shortcircuited pole face secondary winding and a salient-pole winding separately excited, so that it can run either as an induction motor or a synchronous motor, is so arranged that all three windings can be connected to give different pole numbers so that the motor can run in each manner at different speeds. The Figures show such an arrangement for a motor with a rotary field-winding. In Fig. 1, the armature winding 1, the pole face windings 2, and the salient-pole windings 3 are shown connected to give a certain number of poles and Fig. 2, by reversing half of each set of windings to give double the number. The salient-pole windings 2 are provided with adjustable starting-resistances 4. Specifications 25858 /03, 196,750, [both in Class 35], 357,225, and 361,369 are referred to.
Patent GB-333899-A (GB)
IPC: G07B13/04
Abstract: 333,899. Soc. Generale des Compteurs de Voitures, Taximetres. Oct. 6, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Addition to 305,663. Taximeters.-An improvement in the invention set out in the parent Specification comprises an arrangement for the automatic switching on of lamps for illuminating the taximeter flag and the taximeter dial. The spindle of the flag 18 has keyed upon it a cam 18<1> capable of operating a thrust rod 21 coming into contact with a rotatable finger 22 of insulating material, pivoted 'at 23 and acting upon a resilient blade 24, which moves between two contacts, one of which, 25, is connected with the lamp for the dial and the other, 26, with the lamp for the flag. The blade 24 is in connection with a current supply through the plug 27, and connects with the contact 25 or the contact 26 according as the flag 18 is lowered or raised. In a modification shown in Fig. 3 a pin 29 is placed upon the hub of the flag 18 and operates a resilient blade 30 to make contact with the blade 31 or 32 to illuminate the lamp 17 or 15 according as the flag 18 is raised or lowered.
Patent GB-674103-A (GB)
Title: Improvements in or relating to the production of colour photographic images
Inventor: MERCK PHILIBERT LEOPOLD JOSEPH
IPC: G03C7/36
Filed: 1949-12-31
Abstract: 2-Benzthiazolylacethydrazide is prepared by refluxing together ethyl 2-benzthiazolylacetate and hydrazine hydrate in ethanol. b -Quinolylacethydrazide is similarly prepared.  Benzaldehyde 2-benzthiazolylacethydrazone is prepared by reacting 2-benzthiazolylacethydrazide and benzaldehyde in methanol. 2-Benzthiazolylacethydroxylamide is prepared by adding hydroxylamine hydrochloride to a solution of sodium in methanol, and mixing with ethyl 2-benzthiazolylacetate.  3 - p - Tolyl - 1 : 2 : 4 - oxodiazolyl - 5 - acethexadecenylsuccinylhydrazide is prepared by heating together 3-p-tolyl-1 : 2 : 4-oxodiazolyl-5-acethydrazide and hexadecenylsuccinic acid anhydride in tetrachlorethane.  3 - p - Tolyl - 1 : 2 : 4 - oxodiazolyl - 5 - acet - phthalhydrazide is similarly prepared.
Patent GB-668662-A (GB)
Title: Improvements relating to electric welding machines
Inventor: MACDONALD DONALD
IPC: B23K11/31
Filed: 1949-12-31
Abstract: 668,662. Welding by pressure. LUCAS, Ltd., J. Dec. 19, 1950 [Dec. 31, 1949], No. 33485/49. Class 83 (iv). [Also in Group XXXIV] A bearing a for the rotary electrode of an electric resistance welding machine comprises an electrically insulating bush or bushes c, supporting an electrode spindle d, and a plurality of tapered carbon brushes i located in a recess in the end of the bearing remote from the electrode and supported on a conical sleeve f on the spindle, spring j behind the brushes holding them against the bearing and the sleeve in close electrical contact. The springs are supported by an annular cap k attached to the bearing. The cap may have an attached water supply pipe n for delivering cooling water to the electrode via a pipe o in the spindle. From the electrode the water passes through the annular space between the pipe and the spindle, then through a hole p in the spindle to the annular space between the spindle and the bearing from whence it passes to an outlet-hole q in the bearing attached to a drain-pipe.
Patent GB-1056394-A (GB)
Title: Improvements in or relating to a glass composition suitable for lubricating dies in the course of working hot metals
IPC: C03C3/112
Filed: 1965-08-05
Abstract: Glass composition, for the lubricating of dies in the hot extrusion of metals, consist essentially in percentages by weight of SiO2, 52-60; Al2O3, 5-14; CaO, 3-7; Na2O, 23-35; F, up to 2.  Additional ingredients may be K2O, up to 10; Li2O, up to 3; B2O3, up to 5; PbO, up to 5; MgO, up to 6; BaO, up to 5; with total K2O + Li2O maximum 10; total PbO + MgO + BaO maximum 6.
Patent GB-1352091-A (GB)
Title: Saw chain
IPC: B27B33/14
Filed: 1972-07-18
Abstract: 1352091 Saw chain cutter tooth D J LEMERY 18 July 1972 [26 July 1971] 33535/72 Heading B5L A cutter tooth, Figs. 3 and 4, for a saw chain comprises a pair of cutter elements 26a, 26b each of which is the mirror image of the other, the elements being arranged to form a bifurcate cutter tooth the two arms of which are flexible so that during cutting they flex apart under cutting loads. As described the elements 26a, 26b each comprise a flat body portion adapted to be connected with adjacent links of a saw chain, a depth gauge portion 27 and a side cutter element 28. The cutting edge 32 of the element 28 is set at 4À5 degrees to the direction of travel of the saw chain and has a rate of 10 degrees longitudinally. Each element 28 extends normally at 7 degrees to the vertical. The elements 26a, 26b are preferably formed from 0À29 inches thick steel. The saw chain may also include raker teeth, Fig. 5, each of which comprises a horizontal portion 34 connected by a radiused section 33 to a vertical portion. The raker teeth also include integral depth gauges. The portions 34 preferably have the same 10 degree rake as the cutter teeth and their edges, which lie within the kerfs cut by the cutter teeth, preferably have the same 4À5 degree rake. The raker teeth are preferably connected with the cutter teeth by side links and spacer links and the portions 34 of adjacent raker teeth preferably extend in opposite directions.
Patent GB-1198053-A (GB)
Title: Improvements in or relating to Vehicle Guidance Means
Inventor: WARNER MICHAEL GEORGE REEVE
IPC: A01B69/04
Filed: 1966-07-26
Abstract: 1,198,053. Position-finding. NATIONAL RESEARCH DEVELOPMENT CORP. 26 July, 1967 [26 July, 1966], No. 33634/66. Heading H4D. [Also in Division G3] In a system for causing a vehicle to follow a physical contour, the contour is detected by repeated scanning transversely to the direction of travel and the point in the scan at which the contour occurs is utilized to control the vehicle steering automatically. As applied to the automatic guidance of an agricultural tractor to follow one furrow edge when ploughing another parallel to it, the output of a high frequency oscillator 55, pulsed by a generator 51 and amplified at 59, is applied to an ultrasonic transmitter 45 which together with an associated receiver 47 is directed downwardly and continuously reciprocated on the tractor transversely to the direction of travel so that when the tractor is in a desired position relative to the previously ploughed furrow the latter is below the centre of reciprocation. Each pulse from generator 51, after delay at 77, also operates a flip-flop 75 which is later re-set by the signal reflected from the ground received at 47 and amplified, demodulated and shaped by stages 63, 65, 69 and 73. Flip-flop 75 is thus operated for a period corresponding to the reflection distance and charges a condenser in a Transistor circuit 81 to a corresponding voltage so that a pulse of corresponding amplitude is produced by a differentiating circuit 82. Pulses exceeding an amplitude determined by the setting of a potentiometer 85A biasing a diode 87, corresponding to the increased distance to the bottom of the furrow, are applied to a logic circuit AGA which also receives pulses from a switch 95 operated when the ultrasonic transmitter passes the centre of reciprocation. The logic circuit determines whether the furrow is to the right or left of the centre of reciprocation and energizes the appropriate solenoid SA or SB to operate an hydraulic steering motor 121 in such sense and for such a time that the tractor is brought to its correct position. Mechanical feedback may be arranged between the steering mechanism and the ultrasonic transmitter to prevent overshoot. Undue incorrect operation of the steering if a reflected pulse is not received is prevented by applying the pulses from generator 51, without delay, to re-set flip-flop 75. Instead of reciprocating the ultrasonic transmitter and receiver, a plurality of fixed transmitters and receivers, operating at the same or different frequencies, may be arranged across the vehicle and switched into operation in succession.
Patent GB-823176-A (GB)
Title: Improvements in the production of polymers of unsaturated polymerisable ethylene derivatives
IPC: C08F2/22
Filed: 1957-10-29
Abstract: Polymerizable unsaturated ethylene derivatives are polymerized in aqueous dispersion in the presence of a dispersing agent of the general formula <FORM:0823176/IV (a)/1> in which R and R1 represent identical or different aliphatic radicals with at least six carbon atoms, e.g. C9-C18 alkyl radicals, and X is an alkali metal or ammonium cation.  Polymerizable compounds specified are vinyl and vinylidene halides, vinyl acetate, methyl acrylate, acrylonitrile, butadiene and styrene and mixtures thereof, e.g. mixtures of vinyl chloride with vinyl acetate or vinylidene chloride. Polymerization may be carried out with the aid of catalysts such as benzoyl peroxide, lauroyl peroxide, hydrogen peroxide, persulphates, perborates and azo-bis-isobutyronitrile; in Example (3) a mixture of hydrogen peroxide and potassium persulphate is used.  The polymerization medium may also contain protective colloids such as starch, suspension stabilizers such as barium sulphate, salts such as sodium phosphates, carbonate and acetate and magnesium sulphate and regulators such as dodecyl mercaptan di-isopropylxanthate disulphide and chlorohydrocarbons.ALSO:Compounds of the formula <FORM:0823176/IV (a)/1> in which R and R1 represent identical or different aliphatic radicals with at least 6 carbon atoms and X is a cation of an alkali metal or ammonium, are prepared by sulphochlorination of a hydrocarbon fraction, reacting 2 mols. of the resulting sulphochloride with ammonia and neutralizing the acid hydrogen attached to the nitrogen with an alkali or ammonium hydroxide. There are disclosed sodium bis-alkyl sulphonimides in which the alkyl groups are C9 to C12, C12 to C15 and C16 to C18.
Patent GB-470736-A (GB)
Title: Remote control systems particularly for tuning radio receivers and transmitters
IPC: H03J1/22
Filed: 1936-12-08
Abstract: 470,736. Electric selective signalling systems. STANDARD TELEPHONES & CABLES, Ltd. Dec. 8, 1936, No. 33692. Convention date, Feb. 8. [Class 40 (i)] Series of impulses step a shaft for coarse and fine adjustment, reduction gearing being brought into use for the fine adjustment, the same magnet being used to respond to each impulse train. The invention is applied to the remote tuning of a wireless receiver. As shown, the magnet 5 responds to the first impulse train and pawl 3 steps shaft 2 against the action of restoring spring 12. The ratchet wheel 1 is held by pawl 13. At the end of the train magnet 11 rotates shaft 7 so that pawl 3 is withdrawn and pawl 19 becomes effective. The next impulse train steps ratchet wheel 17 so that cam 16 is turned and holding pawl 13 is moved forward <1>/10 of a step for each impulse. For still finer tuning, a third ratchet wheel and pawl may be provided which moves holding pawl 21 <1>/10 of a step for each pulse and so moves ratchet wheel 1 <1>/100 of a step for each pulse. To reset the apparatus the holding pawls 21, 13 are withdrawn by a release magnet. A further pawl-and-ratchet wheel may be provided to control waveband switching.
Patent GB-194420-A (GB)
Title: Improvements in wheel castors for furniture
IPC: B60B33/00
Filed: 1921-12-15
Abstract: 194,420. Cescinsky, H., Catesby, T. W., and Beardmore, J. D. K. Dec. 15,1921. Castors.-The castor horn is made in two parts J with semi-cylindrical upper ends K which are screwed to fit a socket L attached to the post M, steady pins N being used to facilitate assembly. The wheel A has a detachable side flange B and is fitted with a bush F which works on a pin G with squared ends. The post M is head in place by a grub screw W passing through tubes P, V into a channel X. The tube P carries at its lower end a wear-resisting mount such as a chill T, for the bedstead &c. leg V; the upper end is screwed to receive a fibre &c. cap R carrying a hard steel bearing S. A similar bearing 0 is mounted on the rod M.
Patent GB-945223-A (GB)
Title: Improvements in or relating to refrigerators
Inventor: LONDON HEINZ
IPC: F25B9/12
Filed: 1961-09-22
Abstract: 945,223. Refrigerating. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Sept. 17, 1962 [Sept. 22, 1961], No. 34004/61. Heading F4H. A volume of helium 3 is continuously diluted with helium 4, heat being absorbed from a load to provide the heat of mixing. As shown in Fig. 1, the system comprises a fixed condenser 9 disposed in a chamber 7 and a conduit 8 which contains liquid helium 3 and leads, via a heat exchanger 83 to a working chamber 1 surrounding a space 2 to be cooled. A phase boundary 48 is established in the chamber 1 between the helium 3 and a volume of superfluid helium 4 which is contained in a U-tube 3 and into which the helium 3 dissolves. This latter step is stated to be analogous to an evaporative cooling process since the helium 3 in the helium 4 behaves as an ideal gas and is conveyed through the U-tube 3 to a boiler 4 due to a pressure gradient set up in the U-tube by a heater 5 which distils helium 3 from the mixture in the boiler. The helium 3 vapour is passed to the condenser 9 via a conduit 6, the condenser being cooled to a temperature of 0.3 K by the evaporation of pure liquid helium 3 supplied from an external source through a valve 10. The conduit 6 contains a restriction 6a to prevent superfluid helium from creeping up the walls and out of the boiler. A temperature of 0.65  K. is maintained in the boiler and a temperature of less than 0.3 K. is achieved in the working chamber 1. The system is contained in an evacuated jacket 16 which is immersed in a flask 12 containing liquid helium 4 at a temperature of 1.1  K. In a modification of the above process (Fig. 2, not shown) the vapour from the boiler is led out through the jacket 16 and is compressed in an external diffusion pump to a sufficiently high pressure to enable it to be condensed by the helium 4 in the flask 12. The constructional details of the apparatus are illustrated in Figs. 3 to 9 (not shown). At temperatures less than 0.08 K. in the working chamber 1 the concentration of the helium 3 in the boiler becomes too low for it to be distilled off. Thus, in the embodiment shown in Fig. 10 the helium 4 in the U-tube 3 is made to flow at a velocity greater than 10 cm/sec. in order to transport the helium 3 from the working chamber to the boiler. This is effected by employing two " superleaks " 18 and 21 which are impermeable to helium 3 but which offer as flow resistance to superfluid helium 4, the latter being able to flow through the superleaks against a pressure gradient provided that the temperature at the entrance to the superleak is lower than that at the exit. Helium 4 passes from the boiler 4 and through the superleak 21 to the flask 12 which contains helium 4 at a temperature of 1.25 K., then through a valve 20 to a vessel 20 where the helium temperature is maintained at 1  K. by evaporation. Thence the helium 4 passes through the second superleak 18 to the working chamber end of the U-tube 3 so that a circulatflow of helium 4 is set up.