baber/WOPTO huggingface dataset:
Patent GB-422287-A (GB)
Title: Manufacture of mordant dyestuffs
IPC: C09B35/46
Filed: 1933-08-24
Abstract: Mordant trisazo dyes are made by coupling H acid first in an acid medium with diazotized aniline or a derivative thereof (R1) and then in an alkaline medium with a diazotized aminoazo compound of the type R3--N = --R2--NH2 in which R2 = a sulphonated benzene nucleus and R3 = a benzene nucleus which contains a hydroxyl group and a carboxyl group in o-position and may also contain further substituents, e.g. methyl or halogen.  They yield in chrome printing on cotton green to blue-green shades having good fastness properties, particularly to chlorine.  In examples the following dyes are described 3-amino-4-sulphobenzeneazosalicylic acid --> (MgCO2) H acid \sM 4-nitraniline-2-sulphonic acid or 2-nitraniline-4-sulphonic acid; 4 - amino - 2 - sulphobenzene - azo - salicylic acid may also be used. Other components specified are 3-nitraniline-4-sulphonic acid, 4-nitraniline-3-sulphonic acid, p-nitraniline, 4 - chloraniline - 2 - sulphonic acid, sulphanilic or metanilic acid, 4-chloraniline-3-sulphonic acid, 2-chlor-4-nitraniline and 4-chlor-3-nitraniline; instead of salicylic acid there may be used, e.g. cresotinic acid, chloro-salicylic acids and b -resorcylic acid. Specifications 15725/91, 15056/92, [both in Class 2], and 231,885, [Class 2 (iii)], are referred to.  The Specification as open to inspection under Sect. 91 also specifies 4-amino-3-sulphobenzene-azosalicylic acid as the aminoazo compound. This subject-matter does not appear in the Specification as accepted.
Patent GB-1209834-A (GB)
Title: Operational amplifier
IPC: H03F1/08
Filed: 1968-05-17
Abstract: 1,209,834. Operational amplifiers. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 17 May, 1968 [22 May, 1967], No. 23629/68. Heading H3T. This invention relates to an operational amplifier comprising two differential amplifiers coupled together in cascade one of the outputs of the second amplifier providing a negative feedback to both inputs of the second amplifier, the output of the combination being taken from one of the outputs of the first amplifier. In Fig. 3, the two differential amplifiers comprise transistors T 1 , T 2  and T 3 , T 4  respectively with current sources S 1 , S 2  in their respective common emitter lines and impedance Z in the collector circuit of T 3  providing the negative feedback to that same amplifier. The output from this operational amplifier, providing improved drift and stability characteristics, is taken from the base of T 4 . Fig. 2 (not shown) has T 5  in the feedback path to T 3  instead of that to T 4  while Fig. 1 (not shown) is without a transistor in either feedback path.
Patent GB-1022932-A (GB)
Title: A dihydropyranyl propiolactone and polymers thereof
IPC: C08G65/22
Filed: 1964-06-08
Abstract: Lactone-containing polymers are prepared by polymerizing or copolymerizing b -(31,41-dihydro -21H-pyran-21-yl)-b -propiolactone <FORM:1022932/C3/1> in the presence of an ionic initiator.  Specified initiators include BF3, BF3 etherate, acetyl perchlorate, AlCl3, ZnCl2, TiCl4, FeCl3, CF3COOH, FeCl3/propylene oxide complex, and organo-aluminium compounds.  Solvents may be used.  Specified comonomers are styrene, a  - methylstyrene, isobutene, vinyl acetate, acrylonitrile and methyl methacrylate.ALSO:The invention comprises b -(31,41-dihydro-21H-pyran-21-yl) -b -propiolactone. <FORM:1022932/C2/1> It is prepared by reacting 3,4-dihydro-2H-pyran-2-carboxaldehyde (acrolein dimer) with ketene.
Patent GB-760868-A (GB)
Title: Method and apparatus for mining selected earth strata materials from overburden supporting columns
IPC: E21C25/68
Filed: 1954-08-16
Abstract: 760,868. Mineral-mining methods and apparatus. UNION CARBIDE & CARBON CORPORATION. Aug. 16, 1954 [Aug. 26, 1953], No. 23727/54. Class 68 (1). In a strata of selected earth material partially excavated by the boring in it of adjacent parallel passages 12 the overburden-supporting pillars 18 left between the passages 12 are subsequently removed by a remotely controlled, pillarcutting machine 10 being introduced into the passages in sequence to cut away one or both of the pillars bounding the passage as it is withdrawn outwards from the inner end of the passage. The machine 10 loads this excavated material on to an associated conveyer 16, that extends back through and out of the passage advances and withdraws through the passage with the machine 10. The pillar-cutting operation may be carried out at the same time as new passages are bored. The machine 10 includes a pair of members 14, which can be swung independently of each other to project laterally of the sides of the chassis of the machine. Pick-carrying endless chains 24 circulate about the members 14 in horizontal planes. The machine is guided through the passage by shoes 20 engaging the pillars.
Patent GB-850663-A (GB)
Title: Substituted piperazines and process for their production
IPC: C07D295/033
Filed: 1957-10-21
Abstract: The invention comprises compounds of the formula : <FORM:0850663/IV(b)/1> (wherein R and R1 are bromine, chlorine, alkyl of 1 to 3 carbon atoms or alkoxy of 1 to 5 carbon atoms, or R may additionally be an alkylmercapto group of 1 to 5 carbon atoms, R1 being in the 3- or 5-position) and acid-addition salts thereof; and the preparation thereof by reacting an appropriately disubstituted aniline with diethanolamine in presence of at least a slight excess of a mineral acid, or with an acid addition salt of a bis(haloethyl)amine.  Preferably an excess of the aniline compound is employed and the reaction is carried out at elevated temperature. Examples describe the preparation of the 2 : 3-dichloro, 2 : 3-dimethyl, 3-chloro-2-methyl, 2 : 5-dimethyl, 2 : 5-dichloro, 2-methyl-5-chloro, 2-methyl-5-isopropyl, 2 : 3-dimethoxy, 5-chloro-2-isopropoxy, 5-chloro-2-ethylmercapto, 2 : 5-dimethoxy, 2 : 5-diethoxy, 5-chloro-2-methoxy and 2-methoxy-5-methyl compounds of the invention.  Hydrochlorides and hydrobromides of some of the products are described and a list of further salt-forming organic and inorganic acids is also provided.
Patent GB-857503-A (GB)
Title: Improvements in or relating to vessels including vacuum jacketed containers
IPC: A47J41/02
Filed: 1958-07-24
Abstract: 857,503. Vacuum-jacketed vessels. BRITISH VACUUM FLASK CO. Ltd., and HASSID, M. A. July 23, 1959 [July 25, 1958], No. 23853/58. Class 64(2) A vacuum - jacketed vessel 1 is supported in a synthetic resin canister by a necked portion 9 The canister described is a blow-moulding and has an upper part formed as a jug top (not shown) which is a force- or screw-fit in the lower, necked part 6 of resilient polyethylene.
Patent GB-803363-A (GB)
Title: Improvements in or relating to tanks for bituminous compounds and the like
Inventor: HOON FRANK
IPC: E01C19/10
Filed: 1954-08-17
Abstract: 803,363. Batch mixing-machines. MUNICIPAL APPLIANCES CO., Ltd. Nov. 14, 1955 [Aug. 17, 1954; Feb. 24, 1955], Nos. 23875/54 and 5507/55. Class 86  In a mixer for bitumen comprising a double-walled container 11a, 11b having a centrally disposed shaft 14 to which mixing blades 15, 16, 17, 18 are attached by radial arms 21c, the blades 15, 16 consist of oppositely wound helical strips attached to the ends of the arms 21c and the blades 17, 18 comprise oppositely wound helical strips located between the strips 15, 16 and the shaft 14. The space between the walls 11a, 11b is heated by one or more burners 12, a flue 13 being provided. An outlet 23 is located at the end of the container.
Patent GB-532175-A (GB)
Title: Improvements in or relating to tools for the incision of trees
IPC: A01G23/12
Filed: 1939-08-18
Abstract: 532,175. Horticultural knives. JACKSON, L. MELLERSH-. (Naamlooze Vennootschap Maatschappij ter Exploitatie der Pamanoekan en Tjiasemlanden. Aug. 18, 1939, No. 23898. [Class 30] A tool for incising the bark of rubber &c. trees consists of a curved body a joined across the ends by a handle c and provided with a number of cutting blades b.
Patent GB-1115626-A (GB)
Title: Copolymers
IPC: C08F210/00
Filed: 1966-05-31
Abstract: A copolymer of ethylene and at least one mono-olefin of the structure RCH=CH2 where R is a C1 to C10 alkyl group, having an intrinsic viscosity in benzene at 25 DEG  C. below 0.8, is made by copolymerizing ethylene and the monoolefin in an inert organic solvent in the presence of a Ziegler Natta-type catalyst and from 0.01 to 0.04 mole per litre of the reaction mixture of bicyclo-[2.2.1] hepta-2,5-diene.  The copolymers are prepared and recovered by conventional "low-pressure" methods. In the examples a copolymer of ethylene, propylene, and bicycloheptadiene is made by effecting the copolymerization in benzene, in the presence of ethyl aluminum sesquichloride and vanadium oxybis (acetylacetonate).
Patent GB-240921-A (GB)
Abstract: 240,921. Forman, A. A., and Weir,. G. N. July 9, 1924. Radial-flow bladed type; rotors; casings; regulating; reversing.-In a radial-flow turbine of the inward-flow type, the fixed guide vane rings 20, 21 have pairs of steam passages 22, 23 in radial line with each nozzle 19. The rotor may consist of two discs 34, 35 placed back to back. Bellshaped discs 26 adjacent to the sides of the rotor direct the steam from the innermost ring of 'blades 25 to exhaust steam conduits 41. Valves 16, which may be interconnected, control the admission of steam to nozzles. One side of the rotor may be used for reverse running. Provision is made for draining condensed liquid.
Patent GB-481025-A (GB)
Title: Improved operating means for sliding windows, ventilation panels, and the like, in motor vehicles
IPC: E05F11/38
Filed: 1936-09-03
Abstract: 481,025. Vehicle - window regulators. HOOPER & CO. (COACH-BUILDERS), Ltd., and BOOTH, G. S. Sept. 3, 1936, No. 24108. [Class 20 (iii)] A panel or window for a vehicle, situated between the driver and passengers and sliding into an inclined well in the back of the front seat when open, is adapted to be raised and lowered by an electric motor underneath the seat and a non-reversible worm gear and chain H. The motor may comprise separate field windings K<1>, K<2>, one for raising and the other for lowering, the circuits being closed by relays and a switch in a suitable position. Automatic break switches N<1> N<2> worked by the window in raised and lowered positions, may be provided. As shown in Fig. 4, separate switches L<1>, L<2> for driver and passenger say, may be provided, the switch first used breaking the circuit of the other by means of the double contact relays O<1>, 0<2>. A master switch R to cut out the switch L<1> may be provided.
Patent GB-1499670-A (GB)
Title: Detection of degree of opacity in light paths
IPC: G01N21/53
Filed: 1975-06-02
Abstract: 1499670 Photo-electric detection of fog, intruders &c. ENVIRONMENT SECRETARY OF STATE FOR THE 2 June 1975 [31 May 1974] 24178/74 Heading G1A An apparatus which monitors the transmission of light along a path, e.g. to detect fog, smoke or an intruder in the path, has a light source 10, Fig. 1, which transmits light along the path to a concave mirror 12 and thence to a detector 14, the output of which is compared with that of a detector 17 receiving light from the source along a reference path. The mirror has its centre of curvature at point 33 where its axis intersects a line joining lenses 11 and 13; if the apparatus is supported at 33 this geometry minimizes the effects of distortion due, e.g., to wind, fatigue or temperature changes. If the lenses are not used, the centre of curvature is at the intersection of the mirror axis and a line joining source 10 and detector 14. Baffles 18, 19, 20 trap dirt and prevent entry of external light; the mirror and lenses are heated to prevent condensation. The detectors are of similar type and are close together, to minimize temperature effects. The source may be a Ga As P diode, which can be amplitude modulated; in this case it is supplied with current via a PTC thermistor so that ambient temperature does not affect its brightness, and the signals from the detectors, which are balanced in the absence of fog &c., are subtracted and phase detected against the source current to drive a visibility indicator, or to give a visual or audible alarm when visibility drops to a pre-set  level, Fig. 2, (not shown). The reference path to detector 17 may be along an optical fibre 16.
Patent GB-167399-A (GB)
Title: Improvements in and relating to arc welding compositions
IPC: B23K35/04
Filed: 1920-08-20
Abstract: 167,399. British Thomson - Houston Co., Ltd., (General Electric Co.). Aug. 20, 1920. Uniting by fusion.-Relates to arc-welding and consists in compositions or coatings for electrodes containing titanium and an alkali or alkaline earth, which enable lower voltages to be employed. A suitable composition contains rutile 25 parts by weight, manganese dioxide 15, calcium carbonate 10, potassium carbonate 30, sodium carbonate 18, borax 10, and cobalt oxide (black) 20. This mixture is fused, causing the formation of a titanate. A fluxing material may be added to the fused mixture after it has been ground and mixed with water to form a thin paste. The electrodes are coated with this paste and when dry are baked at a bright red heat, or the electrodes may be coated by dipping them into a fused mass containing a titanium compound and a compound of an alkali metal. When the electrodes are to be fed by rollers the composition may be used as a core or placed in a groove or channel.
Patent GB-1262184-A (GB)
Title: Improvements in power system filter
IPC: H02J3/01
Filed: 1969-05-13
Abstract: 1,262,184. Harmonic filters for A.C. power lines; static converters. GENERAL ELECTRIC CO. 13 May, 1969 [16 May, 1968], No. 24276/69. Heading H2F. A harmonic filter for an A.C. power system particularly where connected to static converters in an H.V.D.C. link, comprises LC shunt filters 8, 9, 10, 11 (Fig. 1) to suppress individual characteristic harmonics i.e. harmonics at N times the fundamental frequency where N = 6KŒ1 for six phase converter operation and K is a positive integer, e.g. 5th, 7th etc. respectively, and an additional filter 12 to suppress non-characteristic harmonics i.e. all the remaining harmonics which can arise and produce parallel resonance. The shunt filters 8, 9, 10, 11 are tuned to provide a low impedance for predetermined frequencies to be suppressed. However, at frequencies below that for which a filter is tuned the dominant impedance will be that of the capacitive element. This impedance together with that of power factor correction capacitors 32, 33 etc. may interact with the system inherent inductance 2 to produce parallel resonance. If this occurs at a non-characteristic harmonic frequency even a small current can produce a large harmonic distortion of the system voltage. The filter 12 includes a series LC circuit 26, 25 (selected to provide a low impedance to a specific non-characteristic harmonic e.g. 4th at which parallel resonance may be expected) in which R27 represents the resistance of L26, a blocking filter 29 tuned to the fundamental f and a resistor 28 to damp the non-characteristic component of system voltage. In another embodiment, Fig. 2 (not shown), the filters are connected to the A.C. lines by way of tertiary windings of a transformer which couples a rectifier bridge to the A.C. lines. The converter bridges may be controllable valves or solid state semi-conductors.
Patent GB-909041-A (GB)
Title: Apparatus for measuring an electrical signal and an integral thereof
IPC: G06G7/188
Filed: 1960-07-12
Abstract: 909,041. Voltage measurement; integrating circuits; determining relative quantities of fluid moisture constituents. LEEDS & NORTHRUP CO. July 12, 1960 [Sept. 28, 1959], No. 24325/60. Class 37. Apparatus both for measuring and integrating an input voltage E x  comprising a measuring system 12, 13 delivering an output voltage E p  proportional to E x  to an integrator 25, 32 which provides an output E i  (=#E x dt), the arrangement being that the voltage E x  is first recorded on a chart 19 by a pen 17 connected to slider 13a, switch contacts 33 are then opened and simultaneously (or just before) switches 47, 48 are changed by cams 42, 44 to disconnect the input of the integrator from the output of the measuring system 12, 13 and to connect the output of the integrator to the input of the measuring system, so that E i  (proportional to the charge on capacitor 32) is now measured and recorded. Subsequently, cam 45 first closes switch 54 to discharge capacitor 32 completely, and the cams then restore the circuit to the condition shown so that another measuring cycle can begin. E x  can be integrated over more than one cycle of operation by opening a switch 56 so that 32 will not discharge at the end of each cycle, and integrations over selected time cycles may be omitted by opening and closing switch 61. Integrator comprises a chopper amplifier 26, including a phase-sensitive converter 29 in its output, a capacitor 32 and a resistor 25. The output current from the converter 29 will produce a voltage across resistor 25 opposing the input E p , and difference being reduced to zero due to the feed-back loop of amplifier 26, the reference signal with which said difference is compared being zero due to shorting of amplifier in one position of chopper 27. Specification 865,224 is referred to.
Patent GB-598842-A (GB)
Title: Improvements in or relating to belt joints or coupling devices for flexible driving belts
IPC: F16G7/00
Filed: 1945-09-20
Abstract: 598,842. Belt fastenings. LINDSAY, Ltd., H., and LINDSAY, H. Sept. 20, 1945, No. 24361. [Class 80(i)] The jointing ends A, B, Fig. 9, of a belt are split longitudinally and intertwined to form overlapping portions inclined alternatively in opposite directions so as to co-act with similarly inclined serrated gripping surfaces J, K, Fig. 5, on lateral thrustresisting clamping bars C, D of the type having inclined ends L for engagement with V-pulleys, tilting of these ends being thus minimised. As shown, there are three inclined surfaces, and the bars are clamped together by four bolts passing through holes P, one in each end and two in the centre portion. A single bolt in each portion may be used. Strengthening ribs N are provided between each surface.
Patent GB-1223257-A (GB)
Title: Improvements in or relating to collets
Inventor: GOLD DEREK LAWRENCE
IPC: B23B31/20
Filed: 1967-05-25
Abstract: 1,223,257. Chucks. G.I.B. PRECISION Ltd. 13 May, 1968 [25 May, 1967], No. 24365/67. Heading B3B. The subject matter of this Specification is similar to the subject matter in Specification 1,223,258, except that the claims are directed to a collet having only three operative jaws provided with flat bar engaging faces.
Patent GB-1007685-A (GB)
Title: Improvements in or relating to catalyst compositions
Inventor: HADLEY DAVID JAMES
IPC: B01J23/18
Filed: 1963-06-20
Abstract: Oxidation catalysts consisting of or containing SnO2 and Sb2O4 in combination or admixtures are activated by contacting the catalysts subsequent to calcination at 500-1100  DEG C. with boiling water or aqueous solutions of an acid or a base e.g. CH3COOH, HCl or NH4OH.
Patent GB-912599-A (GB)
Title: Cores for dynamoelectric machine
IPC: B21H3/00
Filed: 1961-07-06
Abstract: 912,599. Laminated cores. WESTING- HOUSE ELECTRIC CORPORATION. July 6, 1961 [Aug. 23, 1960], No. 24530/61. Class 35. [Also in Group XXII] A laminated core for a dynamo-electric machine comprises a wedge-sectioned helicallywound strip 56 of silicon steel or grain-oriented steel having winding slots 52 which is compressed to form a core 54 and suitably secured by welding or riveting &c. in which the spaces between the laminations are filled with an insulating material 60. Specification 811,183 is referred to.
Patent GB-1384987-A (GB)
Title: Separate drawing instrument for geometric and engineering drawing
IPC: G01B3/56
Filed: 1973-05-23
Abstract: 1384987 Protractors E S BOOCOCK 23 May 1973 24675/73 Heading G1X A protractor comprises a blade a pivotally mounted at pivot f on an elongate member having a straight edge b, so as to enable the blade a to be lockingly set at any desired angle to the edge b. A mark k indicates on scale j the set angle, the locking being effected by a screw device g.
Patent GB-950934-A (GB)
Title: Improvements in or relating to locomotive type boilers
IPC: F22B13/14
Filed: 1959-07-20
Abstract: 950,934. Steam boiler fire-boxes; firing doors. B. W. DAWKINS. Oct. 3, 1960 [July 20, 1959], No. 24793/59. Headings F4A and F4B. The rear wall of a fire box for use in a locomotive type boiler comprises a back plate 1 and a back head 2 and has a firing opening 3 which extends for substantially the full width of the fire box interior adjacent the fire box rear wall and may extend for the full height of the wall thereby facilitating firing and more even distribution of fuel over the floor of the fire box. One or more doors or sets of doors close the opening. Thus as shown in Fig. 3 the opening is closed by three sliding doors 10 running on rollers 11. The lower edge 5 of the opening may be defined by the fire box assembly itself or by a floor or grate (not shown), in the latter case the foundation ring 6 being deviated to form at arch 6<SP>1</SP> over the opening.
Patent GB-208227-A (GB)
Title: Improvements in and relating to the "d" of haulage ropes, shackles, and in all cases where a d is being used to connect two or more things together
IPC: F16G15/06
Filed: 1922-09-14
Abstract: 208,227. Howell, A. R. Sept. 14, 1922. Couplings, non- automatic. - The eyes of D-shackles are elongated to enable the collar e of the pin f to be disengaged from the stop a by a lateral movement of the pin. This movement is normally prevented by the hitching-plate k engaging a stop g. A recess l beneath the stop g receives the end of the plate k when the pin is to be manipulated.
Patent GB-1171829-A (GB)
Title: Benzene Polycarboxylic Acid Esters Plasticisers
Inventor: THOMPSON MORICE WILLIAM
IPC: C07C69/76
Filed: 1967-05-30
Abstract: 1,171,829. Coated steel panels. IMPERIAL CHEMICAL INDUSTRIES Ltd. 20 May, 1968 [30 May, 1967], No. 24926/67. Heading B2K. [Also in Divisions C2 and C3] Steel panels are coated with a composition comprising polymethyl-methacrylate, cellulose acetate butyrate and phthalyl bis(beta-propylacetate or octoate).
Patent GB-1535029-A (GB)
Title: Timepiece mechanism
IPC: G04B33/10
Filed: 1977-06-15
Abstract: 1535029 Electronic watches DAINI SEIKOSHA KK 15 June 1977 [18 June 1976] 25041/77 Heading G3T A timepiece train wheel 8 which is driven by the rotor 16 of a stepping motor under control of a (quartz) crystal oscillator and which directly drives the arbor 6 of a time indicator such as a seconds hand (not shown) is coaxially coupled to an index wheel 7 having a larger number of teeth than the wheel 8 and engaged by a pawl 9, 10 or other means periodically to arrest the wheels 7, 8 and thus ensure stepwise movement of the time indicator. The wheel 8, which must have accurately formed teeth, thus has fewer teeth and can be made small, while the teeth of the wheel 7 do not transmit power and need not be so accurately made. A battery 15 is adjacent the wheels 7, 8 and the radius of circular base-plate 1 is made equal to the battery diameter plus the radius of wheel 8 plus the necessary clearances and can be reduced to 12À8 mm.
Patent GB-1459939-A (GB)
Title: Cross-linked polymers containing siloxane groups
IPC: C08G73/00
Filed: 1974-06-06
Abstract: 1459939 Siloxane-group containing polyamides or polyimides and foams thereof CIBAGEIGY AG 6 June 1974 [7 June 1973 2 Aug 1973] 25156/74 Headings C3R and C3C Cross-linked poly(amides, imides, or amideimides) containing siloxane groups, Si content being 0À1-17À0% wt.; are obtainable by heating to 50-350 C. the prepolymers (P) of Specification 1,459,940.  In Example 33 a polyamide prepolymer derived from isophthalic acid dichloride, mphenylenediamine, triethylamine and (γ-aminopropyl) - di - n - propoxymethylsilane was foamed by heating in a mould. Uses.-Fibres, films, coatings, foams, laminates, impregnating, moulding powder, mouldings.