baber/WOPTO huggingface dataset:
Patent GB-522539-A (GB)
Abstract: 522,539. Dyeing; synthetic resins. I.G. FARBENINDUSTRIE AKT.-GES. Dec. 14, 1938, No. 36438. Convention date, Dec. 24, 1937. [Classes 2 (iii) and 15 (ii)] The fastness to water of dyeings on textiles is improved by after-treating the dyed material in a bath containing a small quantity of a product of the reaction of an alkylenediamine or a polyalkylene-polyamine with dicyandiamide. The reaction may be effected by melting a polyalkylene-polyamine or a salt thereof, e.g. a hydrochloride, with dicyandiamide, when ammonia is evolved and resinous, water-soluble products are formed, probably with primary formation of the biguanides of the amines. In the example, a technical mixture of polyethylenepolyamines, consisting mainly of triethylenetetramine, is boiled under reflux with n- or isobutyl alcohol and dicyandiamide, the resin isolated in the usual manner and used in solution for the after-treatment of fabrics dyed with Chicago blue 6B or Brilliant-benzo-fastviolet BL.
Patent GB-1471970-A (GB)
Title: Exposure time control circuit for a camera
IPC: G03B7/093
Filed: 1974-12-04
Abstract: 1471970 Shutter control circuit ASAHI KOGAKU KOGYO KK 4 Dec 1974 [5 Dec  1973] 52503/74 Heading G2A A digital exposure time control circuit for a camera comprises a bi-directional counter 8 and means for applying to the counter digital signals dependent on the log of photographic exposure parameters, namely, B, A, S, T, Apex indices B V , A V , S V , T V . The apparatus works as follows: light falls on a CdS element or photodiode 2, the resulting current flowing through a log conversion diode 4 (V α Bv), and a variable resistor 3 produces V α A V . These two voltages are applied to A-D converter 6, see Fig. 2 (not shown) to convert pulses from a clockpulse generator 7 into pulses the number of which α Bv, Av for application to the counter 8. S v  is applied to the counter 8 from switch group 9 to arrive at a value for T v  which is memorized in the counter 8 and indicated digitally at 11, see Fig. 6 (not shown). Depression of the shutter release button produces a signal to stop further computation by the counter 8. The T v  value is converted to T by the timer counter 13 which comprises bi-stable multi-vibrators, see Fig. 4 (not shown) connected to a clockpulse generator 14.
Patent GB-1135037-A (GB)
Title: Improvements relating to the recovery of oil from gaseous effluents of vacuum pumps
IPC: F04F9/00
Filed: 1965-12-10
Abstract: 1,135,037. Rotary vacuum-pumps. LEYBOLD HOLDING A. G. Dec. 10, 1965 [Dec. 12, 1964], No.52627/65. Heading F1F. [Also in Division B1] Air discharged by a vacuum pump passes by exhaust branch 2 to a glass wool filter 32, from the downstream side of which coalesced oil is returned to the pump. In Fig. 2 the collected oil is returned by float-operated valve 4 and pipe 5 to a nozzle 8 through which the pump exhaust valve discharges into the pump casing, nozzle 8 providing a suction to assist gravity flow of the returning oil. In Fig. 1 (not shown), valve 4 opens into the suction side 6 of the pump. In Fig. 3 (not shown) a breather valve (9) replaces valve 4 and intermittently discharges oil and air into the space upstream of the pump exhaust valve when the pressure therein falls below that downstream of the filter. Or gravity alone may return the oil.
Patent GB-1437679-A (GB)
Title: Preparation of secondary alkyl primary amines from crude  n-paraffin oximes
IPC: B01J23/74
Filed: 1974-12-09
Abstract: 1437679 Secondary alkyl primary amines TEXACO DEVELOPMENT CORP 9 Dec 1974 [2 Jan 1974] 53054/74 Heading C2C A process for the manufacture of a secondary alkyl primary amine having from 10 to 50 carbon atoms comprises hydrogenating, in a polar solvent and in the presence of ammonia and a supported metal hydrogenation catalyst, a composition comprising an n-paraffin oxime having from 10 to 50 carbon atoms contaminated with the corresponding ketone and gem nitroso halide, the polar solvent being one which is capable of absorbing ammonia, which is non-reactive with ammonia and which is capable of at least partially solubilizing the oxime. Preferred solvents are C 1 -C 6  alkanols, C 3 -C 8  ethers and mixtures thereof. Preferred catalysts are platinum, rhodium, nickel or cobalt on an alumina, silica alumina, carbon or kieselguhr support.
Patent GB-1159818-A (GB)
Title: Light Source.
IPC: H01J9/227
Filed: 1966-11-28
Abstract: 1,159,818. Lamps. NATIONAL VIDEO CORP. 28 Nov., 1966 [10 Dec., 1965], No. 53166/66. Heading F4R. [Also in Divisions G2 and H1] Light source apparatus for use in lighthouse structures for forming phosphor dot patterns in shadow mask colour TV tubes comprises a source of light 40 (e.g. a mercury arc lamp at prime focus 41) within a housing including reflector 31, preferably elliptically shaped, and a lens positioned in opening 50, the configuration of the lens being such as to cause the light directed toward the edges of the tube face to be of substantially greater intensity than the light directed toward the centre of the tube face. Preferably the configuration and refractive index of the lens is such as to produce a cardiod radiation pattern (Fig. 6a, not shown). In embodiments, the maximum amount of light is deflected by no more then 45 degrees, e.g. 35 to 45 degrees from axis 42, the angle of the entry surface (155, Fig. 4, not shown), of a quartz lens is 18 degrees 30 minutes to the longitudinal axis for 3650 radiation, and the exit surface, chosen to intersect the narrowest portion of the emergent beam, may be at 30 to 45 degrees to axis 42. The entry surface may be extended (to point 58, Fig. 4, not shown) to form a cone-shaped configuration yielding less light parallel to axis 42 compared with the truncated cone configuration; intermediate variations allow control of the light distribution.
Patent GB-1329436-A (GB)
Title: Safety devices responsive to leakage in piping
IPC: F17D5/00
Filed: 1970-11-10
Abstract: 1329436 Fluid-pressure servomotor control systems CUPEDOS OCTROOI MIJ N V 10 Nov 1970 [10 Nov 1969] 53477/70 Heading G3P A main valve 2 in a pipeline 1 e. g. for natural gas, is closed automatically in the event of leakage by a device connected through a connection 4 to the pipeline. The device comprises a pressure vessel 23 connected through a non-return valve 9 with the connection 4, the non-return valve being by-passed by a flow restrictor 20. Opposite sides of the non-return valve are connected to opposed ends of a double-diaphragm actuator having two diaphragms 36, 37. This actuator operates a vent valve 54 to release pressure from one end of a piston valve 64 which moves to a position where it connects a pressure inlet 70 to an operator 85 of the main valve 2, and simultaneously closes a return line 69. As shown, the diaphragms act through stems 40, 41 on a spring-biased lever 42 engaging the vent valve 54. The pressure is vented into a space surrounding this lever and thence through clearances round the stems 40, 41 to the spaces on the inner sides of the diaphragms which open to atmosphere through holes 33'. The restriction 20 is formed by a helically coiled tube. The loading spring 46 is adjustable.
Patent GB-1496680-A (GB)
Title: Flame retardant polycarbonate composition
IPC: C08L69/00
Filed: 1974-12-16
Abstract: 1496680 Flame retardant polycarbonate compositions GENERAL ELECTRIC CO 16 Dec 1974 [28 Dec 1973] 54242/74 Heading C3R A fire retardant composition comprises a polycarbonate and an alkali metal or alkaline earth metal salt of a sulphonic acid containing a 5- or 6-membered heterocyclic ring wherein the hetero atom is nitrogen, oxygen or sulphur. The salt is preferably present in an amount of from 0À01 to 10% by weight based on the polycarbonate. Many salts are specified, e.g. sodium 2,5 - dichlorothiophane - 3 - sulphonate and sodium 2,6-dichloropyridine-3-sulphonate.
Patent GB-1206482-A (GB)
Title: Improvements in or relating to mechanical presses
IPC: B30B15/00
Filed: 1967-11-29
Abstract: 1,206,482. Mechanical presses. PINAT & CIE S.A.R.L. 29 Nov., 1967 [30 Nov., 1966], No. 54396/67. Heading B5F. [Also in Division B3]  In a mechanical press including a ball-andsocket assembly 19, 20 connecting a drive rod 17 to a slide 10, a sealed capsule 24 completely filled with liquid is inserted between the socket 20 and the slide 10 and can be perforated to liberate liquid therefrom to facilitate unjamming of the press. A threaded plug 30 can be removed to permit perforating of the capsule. The capsule comprises a circular metal container with an internally threaded sealing member (27) and is filled with oil under vacuum.
Patent GB-1184289-A (GB)
Title: Process for the Production of 4,4'-Dihydroxytetraphenyl Methane
Inventor: BEHR ERICH
IPC: C07C37/18
Filed: 1968-11-18
Abstract: 1,184,289. 4,4<SP>1</SP>-Dihydroxytetraphenyl methane. DYNAMIT NOBEL A.G. 18 Nov., 1968 [7 Dec., 1967], No. 54715/68. Heading C2C. A process for preparing 4,4<SP>1</SP>-dihydroxytetraphenyl methane comprises mixing pure dichlorodiphenyl methane and at least 90% pure phenol in a molar ratio of 1:2 to 2: 4 at room temperature or up to 40‹ C. with agitation, heating the resulting mixture of reactants to a temperature of from 105‹ to 160‹ C. until evolution of HCl ceases treating the resulting solidified crude product with a lower C 1-4  alcohol, e.g. ethanol, washing the crystals of 4,4<SP>1</SP>-dihydroxytetraphenyl methane, thereby obtained with water and optionally further washing them in the cold with the lower alcohol until the eluate discharges in colourless form. Pure forms melting at 295‹ C. or in the range 301-306‹ C., are stated to be novel.
Patent GB-1326000-A (GB)
Title: Detergent compositions
IPC: C09B69/10
Filed: 1971-11-25
Abstract: 1326000 pH Indicative polymers DAINICHISEIKA COLOR & CHEMICALS MFG 25 Nov 1971 [25 Nov 1970] 54808/71 Headings C3P and C3R [Also in Division C5] A pH indicative polymer in which a polymeric group is bonded to a pH indicator and which sharply changes colour at a specific range of pH is prepared by any one of the following processes. (A) A pH indicator having a radical capable of condensation or addition condensation, is condensed with a polymer or polymerizable monomer having a suitable radical. (B) A pH indicator having a diazonium radical is admixed with an α, #-ethylenic unsaturated monomer and the monomer is addition polymerized using the pH indicator having a diazonium radical as a polymerization initiator. (C) A pH indicator having α,#-ethylenic unsaturated radical is mixed with any α,#-ethylenic unsaturated monomer and is addition polymerized therewith. In examples: (I) thymolphthalein-4-carbamide polyethylene glycol is prepared by process (A), the polyethylene glycol reactant having a molecular weight of 4000, the colour change being blue (alkaline solution) to reddish-brown (acid solution) over pH 8À9 to 9À5. (II) Co-condensate of p-xylenol-4-carboxy-phthalein-naphthalene sulphonic acid-formaldehyde-Rhodamine B (15 : 74 : 11 : 0À1) is prepared by process (A), the colour change is blue (alkaline solution) to red (acid solution) over pH 8À8 to 9.5. (III) Dibromothymolphthalein bonding copolymer of acrylic acid-hydroxyethylmethacrylate (1 : 2 : 2) is prepared by process (B), the colour change is bright blue (alkali) to colourless (acid) over pH 8À5 to 9À5. (IV) Dibramo-4- copolymer of methacrylamidephthalein-acrylamide-hydroxyethyl methacrylate (1 : 2 : 2) is prepared by method (C), the colour change is bright blue (alkali) to colourless (acid) over the pH 8À5 to 9À5. (V) Co-condensate of dibromophenol - 3,4,5,6 - tetrachlorophthalein - melamine - formaldehyde - Rhodamine B (8 : 47 : 45 : 0À12) is prepared by method (A), the colour change is blue (alkali) to red (acid) over pH of 10À5 to 9À5. (VI) Co-condensate of p-xylenol-4- carboxyphthalein - naphthalene sulphonic acid-formaldehyde (15 : 74 : 11), the colour change is blue (alkali) to colourless (acid) over pH of 8À8 to 9À5.
Patent GB-1337009-A (GB)
Title: Spindle attachment for use in spinning
IPC: D01H7/18
Filed: 1970-11-19
Abstract: 1337009 A spindle attachment to reduce ballooning MASOHINENFABRIK RIETER AG 19 Nov 1970 [21 Nov 1969] 54984/70 Heading D1D An attachment for spindles in ring spinning machines comprises a shaft 26 for connection to the spindle and a yarn-engaging head 27 with longitudinal grooves 31 and a portion 34 which tapers towards the shaft 26 and makes an angle of from 8‹ to 13‹ with the attachment axis. The maximum attachment diameter is less than 2.8 times the shaft diameter. A further less tapered portion 33 may be provided and a portion 41 tapering the other way may be provided between portion 34 and shaft 26. A conical cap 50 may be provided or alternatively a hemispherical cap Fig. 7 (not shown). Circumferential grooves may be provided as shown in Fig. 5 and Figs. 6 and 7 (not shown). The extension fits in a releived bore in the spindle top and its shaft diameter is less than one third of the diameter of the spindle to which it is attached. A guide 11 may be provided, Fig. 1, at a distance of 3 to 6mm above the attachment. Dimensions and proportionality of most parts of the attachment are given.
Patent GB-1197627-A (GB)
Title: Fluid Pressure Control Valve.
IPC: F16K11/10
Filed: 1967-12-04
Abstract: 1,197,627. Valves. BENDIX - WESTINGHOUSE AUTOMOTIVE AIR BRAKE CO. 4 Dec., 1967 [15 Dec., 1966], No. 55015/67. Heading F2V. A valve for unloading a compressor 14 supplying fluid pressure to a reservoir 18 via passages 20, 22 and non-return valve 32 has a valve 36 between the inlet passage 20 and an exhaust chamber 60 connected to a piston 26 responsive to the pressure differential between passages 20, 22. The exhaust chamber 60 is connected to atmosphere via aperture 43 in end closure 44 and a slide valve formed by a lip cup 48 on the valve 36 and a sleeve 59 which moves downwardly against spring 68 when the inlet pressure rises due to connection 82. The latter movement positions the lip cup against flange 84 closing communication between the exhaust chamber 60 and atmosphere which previously was via flutes 58 opposite the lip cup. When the outlet pressure rises to overcome spring 56 the exhaust valve 36 opens to allow fluid pressure from the inlet to pass into chamber 60 in which it acts on lip cup 48 to again move it opposite flutes 58 and open the exhaust valve wide and to atmosphere. When the inlet pressure is substantially atmospheric spring 68 returns sleeve 59 to its upper position and when the outlet pressure drops exhaust valve 36 closes.
Patent GB-1126599-A (GB)
Title: Method and apparatus for processing of ophthalmic lens
Inventor: RUDD MILO OLSON
IPC: B24B9/14
Filed: 1965-12-31
Abstract: 1,126,599. Spectacle lenses. UNIVIS Inc. Dec.31, 1965, No. 55369/65. Heading G2J. [Also in Division B3] A lens blank having one finished surface of spherical form has its other surface and edge formed in apparatus (see Division B3) using parts 20, 22 which are secured to the finished surface of the unfinished blank in predetermined alignment with the ultimate mechanical centre and ultimate optical centre, respectively, of the finished lens, a reference 24 also being provided to provide a horizontal alignment reference which is used to align the lens blank according to the cylinder axis of the finished lens. The lens may be of the single vision type having a front surface of spherical form and a rear surface formed with a spherical or toric surface, or, as described, may be of the bifocal type having a segment 12 with a horizontal upper edge which is located by the parts 20, 22 during the production of the lens in a predetermined position relative to the mechanical and optical centres and in predetermined angular relation to the cylinder axis of the toric surface as determined by the reference 24 according to the prescription of the prospective user. The edge of the lens is rough ground to slightly larger than the finished size before the rear surface is ground and is then finished with a bevel edge.
Patent GB-1488150-A (GB)
Title: Method of manufacturing semiconductor devices
IPC: H01L21/67
Filed: 1974-12-23
Abstract: 1488150 Splitting semi-conductors GENERAL ELECTRIC CO 23 Dec 1974 [8 Feb 1974] 55515/74 Heading B5E A process of manufacturing semi-conductor devices comprises processing a semi-conductor wafer to form, upon subdivision, a plurality of semi-conductor pellets, and subdividing the wafer into the pellets which are separated by stretching a deformable membrane to which the pellets are coupled by variable coupling means such that the pellets are less firmly coupled to the membrane following membrane stretch than prior to membrane stretch. The wafer 21, which may be monocrystalline silicon, germanium or gellium arsenide, has a plurality of regions 22 of P-type conductivity therein to form P-N diode pellets 27 when the wafer is subdivided. Alternatively, the pellets may form transistors. SCRs, integrated circuits or the like instead of diodes. A major surface 24 of the wafer may have a metallic contact 25 to which the coupling means in the form of a ductile variable coupling material 26 is affixed, the material being preferably a synthetic resin and applied as a liquid cured at room temperature and preferably 0À1 to 0À5 mil. thick. The wafer is then scrubbed and divided into pellets, the layer 26 remaining in one piece and holding the pellets together. A stretchable membrane 30 is then fixed to the layer 26 by an adhesive or by heating to approximately 225‹ F. so that the layer is adhered more strongly to the membrane then to the coupling layer 26 and pellets. When the membrane 30 is stretched, the pellets are separated, Fig. 5, and breakdown of adhesive occurs between the layer 26 and the metallic coating 20 first around the periphery of the pellets and moves inwardly so that the pellets are held only by pedestals, the pellets then being easily removed from the membrane, for example, by a vacuum probe. In apparatus for stretching the membrane, an outer cylinder 33, Fig. 9, is mounted on a base 32 and slidably receives an inner cylinder 34 which is vertically movable by cams 37 on a shaft 36 rotated by a handle 35 to engage a rounded upper surface with a membrane 46 carrying the pellets 47 and clamped to the upper end of the outer cylinder 33 by a pivoted frame 39.
Patent GB-1439009-A (GB)
Title: Primary insulation for filled abble polymeric compositions and process for their manufacutre
IPC: C08L7/00
Filed: 1973-12-03
Abstract: 1439009 Ethylene polymer compositions UNION CARBIDE CORP 3 Dec 1973 [4 Dec 1972] 55888/73 Heading C3P Compositions useful for primary insulation in contact with moisture barrier filler and copper conductor in electric wires and cables comprise (1) a solid ethylene polymer of density 0À928 to 0À955 g./cc., (2) copper deactivating amounts of at least one oxalyldihydrazide, alkyl hydroxyphenyl alkanoyl hydrazine or substituted amido triazole and (3) effective amounts of an antioxidant other than (2) having a molecular weight of at least 550 and selected from sulphurfree compounds containing at least three hindered phenolic hydroxyl groups and compounds containing divalent sulphur and at least two hindered phenolic hydroxyl groups, components (2) and (3) together constituting more than 0À1 per cent by weight of the composition. The ethylene polymer may be a homopolymer or copolymer with up to 10 weight per cent of propylene, butene-1, pentene-1 or hexene-1. The compositions may also contain pigments, e.g. carbon black and titanium dioxide, and blowing agents. Examples describe compositions comprising (1) ethylene/butene-1, copolymers, (2) copper deactivators selected from N,N<SP>1</SP>-dibenzyl oxalyl dihydrazide, N,N<SP>1</SP>-bis-#- (3,5 - di - t - butyl - 4 - hydroxyphenyl)propionyl hydrazine, 3-salicyloylamido-1,2,4-triazole and alkyl derivatives thereof, and (3) antioxidants selected from pentaerythritol tetra-3,5-di-tbutyl-4-hydroxyphenylpropionate, a polymeric hindered phenol, 1,3,5-trimethyl-2,4,6-tris-(3,5- di - t - butyl - 4 - hydroxybenzyl)benzene, 1,3,5 - tris - (3,5 - di - t - butyl - 4 - hydroxybenzyl) - s i triazine - 2,4,6(1H,3H,5H)trione and the di-(3,5-di-t-butyl-4-hydroxyphenol propionic acid) ester of dihydroxymethyl thioether.
Patent GB-1495254-A (GB)
Title: Edible fat compositions
IPC: A23D9/00
Filed: 1973-12-04
Abstract: 1495254 Edible fat compositions UNILEVER Ltd 2 Dec 1974 [4 Dec 1973] 56166/73 Heading C5C [Also in Division A2] An edible fat composition suitable for use in confectionery, having a randomly distributed fatty acid composition of a blend of a lauric fat with a smaller weight of a stearine fraction of a non-lauric edible C 16 -C 18  fat, the composition having a maximum slip melting point of 45 C., a maximum dilatation at 20 C. of 900 and a maximum Iodine Value of 20, may be prepared by fractionating a non-lauric edible C 16 -C 18  fat to obtain a steanne fraction and randomizing a blend of a lauric fat with a smaller weight of the stearic fraction, if necessary with hydrogenation before or after blending. In the examples, palm stearine, refined coconut oil, palm kernel oleine, whole coconut oil, palm oil, fully hydrogenated coconut oil, cottonseed stearine and coconut-paring oil are blended, randomly interesterified using sodium methoxide catalyst and hydrogenated using a fresh supported nickel catalyst.
Patent GB-1404961-A (GB)
Title: Measurement of timing jitter on pcm systems
IPC: H04L1/20
Filed: 1972-12-07
Abstract: 1404961 Phase detectors; transistor circuits STANDARD TELEPHONES & CABLES Ltd 7 Dec 1972 56487/72 Headings H3A and H3T A PCM regenerator comprises: means for producing a clock signal from the output pulses; switching means for producing from the clock signal a squarewave signal of the same frequency; a sawtooth generator including a capacitor charged at a constant rate and discharged in response to the squarewave; and a sample and hold circuit in which the sawtooth is sampled by the data output pulses. Limiter and sawtooth generator, Fig. 3.- A sinewave clock signal, produced by means not shown, is clipped in limiter T1, T2 to produce a square wave, which is amplified by T3, T4 and differentiated to produce short duration pulses from T5. These pulses are fed to transistor T6 to turn it on and short capacitor C1. In between pulses, C1 charges linearly from constant current source T7 to produce a sawtooth output which is applied to input 41 of the gate and store circuit, Fig. 4. Switch S may be included to switch in a different value capacitor. Gate and store circuit, Fig. 4.-The PCM signal whose timing is to be detected is in the form of bipolar pulses, which are applied to input 42. The pulses are rectified, amplified by transistors T9, T10, T11 and fed to transistor T12 which produces short sampling pulses. These pulses are then applied via long-tailed pair T14, T14 to the gating input of gate T16, T17. During a sampling pulse capacitor C2 charges to the value of the instantaneous value of the sawtooth applied at 41, T18, T19 isolating the capacitor from the output 43.
Patent GB-1419540-A (GB)
Title: Protective covers for underground high voltage cables
IPC: H02G9/02
Filed: 1972-12-08
Abstract: 1419540 Cover for underground cable ELECTRICITY COUNCIL 29 Oct 1973 [8 Dec 1972] 56835/72 Heading H2C A protective cover for an underground cable comprising a fibre re-inforced concrete plate-like element 3 having an interior space 2 filled with polymeric or elastomeric material. Space 2 may occupy 50% of the total volume of the cover. The filling is preferably of particles of the polymeric or elastomeric material and may be of chippings, crumbs or spheres of polymeric material, e.g. polystyrene, polyethylene or polyvinylchloride or of elastomeric material, e.g natural or artificial rubber. The element 3 is typically formed of cement, fine mineral aggregate and a re-inforcing polypropylene, glass, nylon or ceramic fibre mixed with at least one synthetic resin which may be a solvent evaporation type such as a latex or emulsion resin, or a thermosetting type such as polyester, epoxy or polyurethane. Examples of making the concrete covers with the relevant quantitative data are included in the Specification.