baber/WOPTO huggingface dataset:
Patent GB-1479868-A (GB)
Title: Sense circuits for semi-conductor circuit storage arrays
IPC: H03K5/02
Filed: 1975-11-28
Abstract: 1479868 Transistor bi-stable circuits; sense amplifiers INTERNATIONAL BUSINESS MACHINES CORP 28 Nov 1975 [19 Dec 1974] 48943/75 Heading H3T A sense amplifier for sensing the state of bit lines B0, B1, comprises an emitter coupled differential amplifier T5, T6 and a cross-coupled latch T1, T2 which share common loads R1, R1<SP>1</SP> R2, R2<SP>1</SP>, which loads are shunted by feedback transistors T3, T4 turned on simultaneously with the associated transistor T1 or T2 to speed the switching. The state of the latch T1, T2 is read-out by a buffer circuit comprising transistor T7 which constitutes with T2 a current switching differential circuit. T7 feeds an output driver comprising a common emitter stage T8 and an emitter follower T9. Transistors T10, T11, T12 and T13 or Schottky diodes may be provided to prevent transistors T1, T2, T7 and T8 saturating.
Patent GB-1272359-A (GB)
Title: Hinge valve
Inventor: SMIRRA JOHANNES RICHARD
IPC: F16K1/22
Filed: 1970-10-15
Abstract: 1,272,359. Valves. TRW Inc. 15 Oct., 1970, No. 49137/70. Heading F2V. A valve comprises two flaps 6, 8 pivotally attached to a support member 18 in a conduit 2 and a piston 30 to move the flaps between open and closed positions. Actuating fluid is supplied through a conduit 40, which may alternatively be arranged in the member 18, and the piston may be spring-biased to either the open or the closed position of the flaps. Magnets arranged in cavities in the flaps prevent chatter when the valve is open and a further magnet 50 operates a proximity switch 52 to indicate the valve's position.
Patent GB-1533150-A (GB)
Title: Tuyere assemblies
IPC: F16L39/00
Filed: 1976-11-26
Abstract: 1533150 Converter bottom tuyeres CREUSOTLOIRE and E SPRUNCK 26 Nov 1976 [10 Dec 1975] 49546/76 Heading F4B A tuyere assembly for a converter or metal refining furnace comprises a metal scabbard 3 secured to the converter bottom plate 1 and having an inner shoulder 4 and a flange 5, an outer pipe 7 having a flared lower end 10 and an inner pipe 8 spaced from the outer pipe and having a spherical swelling 11 below the flared end 10 of the outer pipe in use, a hollow cylindrical body 12 having an inlet 13 for fluid to be delivered through the gap between the inner and outer pipes, an upper rounded shoulder 17 for forming a fluid tight joint with the flared end of the outer pipe, and a machined spherical face 16 engaging the swelling 11, and a clamping plate 18  with a machined seat 19 for receiving the swelling 11 and arranged to be bolted to the flange 5 of the scabbard 3. The assembly also includes a cap 26, Fig. 2, removably secured to the scabbard 3 by cutters 27, 28 and a stopper 21 seated within the flared end 10 of the outer tube and bolted to the flange of the scabbard 3 so that the outer tube 7 may be held in place on the converter bottom plate 1 while the refractory lining 2 is formed.
Patent GB-1516554-A (GB)
Title: Sulphur composition
IPC: C04B28/36
Filed: 1975-12-03
Abstract: 1516554 Plasticized sulphur compositions CHEVRON RESEARCH CO 3 Dec 1975 [3 Dec 1974 13 Nov 1975] 49736/75 Heading C5W A composition comprises from 50 to 98 weight percent of sulphur, from 0À05 to 25 weight percent of a sulphur plasticizer and from 1 to 40 weight percent of mica, based on the total composition. The term 'mica' means a layered silicate having an X-ray diffraction pattern d spacing of 9À6 to 10À1 A. A particular composition comprises dicyclopentadiene as sulphur plasticizer and further comprises glass fibre. Talc, asbestos or expanded silica may also be present.
Patent GB-1537248-A (GB)
Title: Flash smelting process and furnace for the smelting of finely-divided sulphide or oxide and sulphide ore and concentrate
IPC: C22B5/14
Filed: 1975-12-05
Abstract: 1537248 Smelting furnaces; cooling arrangements OUTOKUMPU OY 5 Dec 1975 50033/75 Addition to 1507941 Heading F4B In a flash smelting furnace wherein a suspension of finely divided sulphide or oxide and sulphide ore and/or concentrate in air and/or oxygen is fed to the upper end of a vertical reaction shaft 1 through an inlet 3, the interior of said vertical shaft 1 is provided with a forced circulation water cooling system for stabilizing the temperature of the downwardly directed suspension, the surface of said cooling system, being covered with an insulating layer of solidified material consisting of matte and slag components resulting from the smelting of the ore suspension within the shaft. The amount of heat removed from the shaft via the cooling system is dependent on the thickness of the solidified material layer which in turn is dependent on the reaction heat or temperature within the shaft. Smelted material leaving the bottom of the shaft enters the melt 5 within a horizontally extending reverberatory furnace 2. Heat is supplied via burners X and Y at the start of the smelting process. Waste gases leave the furnace through a flue stack 7, Fig. 2, which is provided with a device (not shown) for removing entrained residual material therefrom. The reaction shaft 1 may be subdivided into a plurality of vertically extending side by side reaction zones 6 as shown in Fig. 2, the boundaries or walls of said zones being defined by water cooling pipe systems 4.
Patent GB-1388167-A (GB)
Title: Diffraction image projection printing of photoresist masking layers
IPC: H01J29/39
Filed: 1972-11-01
Abstract: 1388167 Diffraction image projection printing R C A CORPORATION 1 Nov 1972 [1 Nov 1971] 50388/72 Heading G2A In the production of a masking pattern of developed photo-resist by diffraction image projection printing using collimated light and an assembly of closely spaced and parallel photo-resist-coated member 12 and photo-mask 10 (e.g. having a line pattern with a density of 1000 lines/cm), exposure is carried out while the orientation of a given line through the surface of the assembly with respect to a given plane containing the light direction 34 is varied and the light direction has or passes through an oblique orientation with respect to the plane of the assembly. The variation of orientation may be effected by rotating the assembly about an axis at a small angle (e.g. 0.01-0.001 radions) to the light direction while optionally varying the orientation of the axis of rotation with respect to the light direction and/or the plane of the assembly with respect to the axis of rotation. Alternatively, the light beam may be rotated. The light may have a coherence length of at least 300 microns and a wavelength of 400-500 nanometers. The spacing between photo-resist coating and photo-mask may be 6-180 microns. The desired primary diffraction image may (depending on spacing) be a Fresnel or self image. The printing process may be used in the production of a storage tube target for incorporation in a vidicon camera tube and comprising a wafer of silicon covered on one side with a silicon dioxide layer etched into a high line density array of parallel silicon dioxide bars.
Patent GB-1067617-A (GB)
Title: Improvements in solid fuels, especially for rocket engines, and in the method of making said fuels
Inventor: FRANCAIS GUY
IPC: C06B47/10
Filed: 1963-12-20
Abstract: A solid fuel block characterized in that it is produced by the agglomeration of one or more powdered solid fuels containing boron, carbon, hydrogen and nitrogen, obtained by the action, at a temperature at most equal to ordinary temperature, of diborane on phenylhydrazine and/or 1,1-dimethyl hydrazine, together with a binder, for example cellulose triacetate, polyvinyl chloride, polyethylene, "Stratyl" (a Trade Mark relating to a mixture of polyesters and styrene), an elastomer, such as natural rubber, or paratolyl borazane.  The agglomeration may be effected at a pressure ranging from 50 to 1000 kgs/cm.2  The solid fuel block has a hypergolic character with respect to some oxidizers such as nitric acid, nitrogen peroxide, fluorine or chlorine trifluoride.ALSO:The invention comprises boron, carbon, hydrogen and nitrogen containing compounds which are solid at 60 DEG  C. resulting from the action, at a temperature at most equal to ordinary temperature, of diborane on phenylhydrazine and/or 1,1-dimethyl hydrazine.  The solid product is advantageously agglomerated under pressure, e.g. 50 to 1000 kg./cm.2 at ordinary or moderate temperature.ALSO:A solid fuel comprises a complex obtained by the action of diborane on phenyl hydrazine and/or 1,1-dimethyl hydrazine agglomerated with polyvinyl chloride or polyethylene as a binder.
Patent GB-997547-A (GB)
Title: Improvements in or relating to lined packages or cartons
IPC: B65D5/60
Filed: 1963-12-23
Abstract: 997,547. Lined cartons. ESSELTE FORPACKNING A.B. Dec. 23, 1963 [Dec. 27, 1962], No. 50710/63. Heading B8P. A cardboard carton having a lining 12 that is not slit at the comers but which is secured to end flaps 7, 8, 10 and is not secured to flap 9, has each of two opposite end flaps 8, 10 formed of two right-angled triangles 14, 15 as shown. The triangles are separated by a crease line 13. The flap 7 is equal in width to half the width of walls 5 or, in a further embodiment, the width of flap 7 is greater than half the width of walls 5 and is provided with a crease line corresponding to the mid-point of the width of walls 5. In this second embodiment the flap 7 is doubled at the crease line. The carton is sealed by securing flap 9 to the previously folded-in flaps 7, 8, 10. The lining could be provided only at the ends of the carton.
Patent GB-1399253-A (GB)
Title: Dimerisation process
IPC: C07C209/68
Filed: 1971-11-08
Abstract: 1399253 Diaminohexanes IMPERIAL CHEMICAL INDUSTRIES Ltd 3 Oct 1972 [8 Nov 1971] 51718/71 Heading C2C Diaminohexanes are produced by the dehydrodimerization of n-propylamine by heating in the presence of a bismuth catalyst, preferably at 100-450‹ C. The main product is 1,6-hexamethylene diamine, but some 2-methylpentamethylene diamine may be formed, and the proportion of the latter increases in the presence of ammonia. Suitable catalysts are bismuth oxide, hydroxide, chloride, bromide, nitrate or carbonate, or organic compounds, e.g. BiR 3  where each R is a hydrocarbon radical. The catalyst may be supported, and may contain other metal catalysts, e.g. transition metal catalysts.
Patent GB-1168488-A (GB)
Title: Disazo Dyes
Inventor: WALLACE DAVID JEFFERSON
IPC: C09B31/043
Filed: 1966-11-18
Abstract: 1,168,488. Disazodyes. EASTMAN KODAK CO. 18 Nov., 1966 [10 Dec., 1965], No. 51820/66. Addition to 1,122,408. Heading C4P. [Also in Division C2] The invention comprises disazo dyes of the formula wherein R<SP>1</SP> represents an unsubstituted or substituted phenyl group, R and R 1  each represent an unsubstituted or substituted phenylene group, R 2  represents H, or an alkyl, or phenyl group which may be substituted, R 3  represents a C 1 -C 4  alkylene group which may be substituted, and Y represents the atoms of a carbon chain necessary to complete a 5- or 6-membered ring, which may be fused to a benzene ring. They may be obtained by coupling a diazotized amino-azo-benzene with a coupling component of the formula  Examples are given for the production of the dyes. They are useful for dyeing polyester, polyamide and cellulose acetate fibres.
Patent GB-1481689-A (GB)
Title: Hydrogenation of coal
IPC: C10G1/08
Filed: 1973-11-08
Abstract: 1481689 Hydrogenated coal extracts COAL INDUSTRY (PATENTS) Ltd 24 Oct 1974 [8 Nov 1973] 51930/73 Heading C5E Hydrogenated coal extracts are produced by contacting coal with a gas phase solvent at below 550 C. in the presence of hydrogen and a catalyst comprising a salt or oxide of a metal other than a noble metal; separating the gas phase solvent from the solid residue; and condensing the hydrogenated products and decomposition products from the gaseous or vapour phase; the solvent comprising one or more utilizable solvent components which have critical temperatures above 150 C. and which are above their critical temperatures at the extraction temperature and the sum of the reduced partial pressures of such components is at least 1. Coal 1, crushed to below 1À5 mm., is mixed with toluene 4 and a hydrogen stream 8 and passed through the heater 7 into the reactor 11. The reactor 11 contains a fixed or fluidized bed of catalyst, e.g. cobalt and molybdenum oxides on alumina at 340-480 C. and 150-300 atmospheres. The stream 12 from the reactor 11 is separated into a residue 14 and a stream 15 which is passed to the pressure-reducing device 16, e.g. a throttling valve or a turbine, in which it is reduced, e.g. to 1-3 atmos. gauge and simultaneously cooled to about the boiling point of the solvent. The cooled stream 17 is separated into a gas and solvent vapour stream 30 and a denser liquid stream 19 which is passed to the combined still and fractionating column 20. The column 20 is suitably operated at 150 C. and an overhead pressure of 60 Torr to produce a liquid residue 21, lower boiling material 24<SP>1</SP> and solvent vapour 22. The stream 30 is cooled to 20-40 C. at 31 and purified at 39 (e.g. to remove CO 2 , H 2 S, NH 3 , CH 4  and optionally C 2-4  hydrocarbons) after removal of entrained mist at 36 and prior to recycle via line 40. In examples, the reaction is carried out in an autoclave using a catalyst comprising (a) a mixture of cobalt and molybdenum oxides on alumina with sulphur, (b) zinc chloride, or (c) antimony bromide.
Patent GB-1274217-A (GB)
Title: Electroless plated polymeric articles
IPC: C08L39/08
Filed: 1969-05-01
Abstract: 1,274,217. Electroless plated polymeric articles; polysulfone compositions. UNIROYAL Inc. 1 May, 1969 [23 Aug., 1968 (2)]. No. 52027/68. Headings C3F, C3G, C3P and C3R. A plastics article has an electrolessly deposited metal coating thereon, optionally also an electroplated coating, the plastics material having a first constituent which is an ABS inter- or graft polymer, an AS or AB copolymer, or a blend thereof, a polyether, a (meth)acrylate polymer, a polystyrene, polyvinyl chloride, polyester, polycarbonate, polysulphone, polyolefin, polyamide, or a cellulose ester, and a second constituent which is at least one basic-nitrogen-containing polymer, the constituents either being blended together or the material being in the form of an interpolymer or graft polymer of the constituents. In the examples, the following polymers are prepared: (1) styrene/acrylonitrile/2- vinyl pyridine terpolymer by emulsion polymerization, and (12) and (13) styrene/aorylonitrile/2-vinylpyridine grafted on to a polybutadiene or butadiene-styrene copolymer base using an emulsion or bead polymerization. The following polymers are blended and used for electroless plating:-(a) not containing basic nitrogen-polystyrene, acrylonitrile/styrene/ABS graft polymer, ABS polymer, styrene/acrylonitrile copolymer, polyvinyl chloride, polyoxy methylenes, cellulose acetate butyrate, and a polysulphone, and (b) containing basic nitrogen - polyvinyl pyridine, styrene/2 vinylpyridine (2VP) copolymer, styrene/acrylonitrile/2VP terpolymer, 2VP-ABS graft polymer, 2-methyl-5- vinyl pyridine (15-vinyl picoline)/2VP copolymer, a styrene/maleic anhydride copolymer treated with dimethylamino-propylamine, and acrylonitrile/styrene/2VP grafted on to polybutadiene or butadiene styrene copolymer. In Example 16 some of the latter polymers are used alone for electroless plating. A pigment and a lubricant are also included in the blends.
Patent GB-1531488-A (GB)
Title: Reading optical recordings
IPC: G11B7/085
Filed: 1975-12-19
Abstract: 1531488 Automatic control of focus PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 Dec 1975 [23 Dec 1974] 52042/75 Headings G3N and G3R In a system in which the position of an objective is automatically adjusted to maintain a beam of radiation from a source (laser) focused on a reflective information (video) track on a flat carrier (transparent disc) by means of a signal derived from radiation detectors, an additional signal is initially superimposed to drive the objective towards the record at a limited rate until the focus point is passed, whereupon a control signal of opposite polarity is produced to drive the objective away from the record at a higher rate of acceleration. The object is to ensure rapid focusing at switch-on but without the risk of the objective striking the record. A focus error signal Vf is obtained from a differential amplifier 50 connected to the two detectors 55, 56 and is used to energize a loud-speaker type of moving coil Sp attached to the objective via transistor amplifiers T 1 , T 3  or T 2 , T 4  according to polarity. At switch-on, only switch SA of those shown is closed so that additional voltage VB from a source 57 is superimposed on Vf at 51 and the combined signal energizes Sp via T 1 , T 3 , but since their power supply switch S c  is open they act only as limiters. When the focus point (c) Fig. 2 (not shown) is passed, Vf reverses its polarity, swamping V B  and the combined signal is amplified by T 2 , T 4  whose power, from 58' is on, causing rapid withdrawal of objective. A timer 54 closes SB to short VB, and Sc to energize T 1 , T 3  and the focus is maintained in the normal way. To provide constant velocity (rather than constant acceleration) during the lock-in phase a feedback circuit 52, 53, effective in the "run-in" direction only, is provided from the output of a bridge of which Sp is one arm. Two alternative detailed circuits of Fig. 3 are described Figs. 4 and 5 (not shown). The system may alternatively be used with the optical grating form of focus detecting system described in Specification 1391335.
Patent GB-1439072-A (GB)
Title: Thermal treatment of steel
IPC: C21D6/00
Filed: 1973-05-15
Abstract: 1439072 Heat treating hyper eutectoid steel TORRINGTONCO 15 May 1973 [18 May 1972] 52103/75 Divided out of 1439071 Headings C7A and C7U  A hyper eutectoid steel containing less than 10% total alloy content is heated to the austenitizing temperature to take initial carbides into solution and quenched into the temperature range 900- 1333F bring about transformation to pearlite. It is then re-heated rapidly through A 1,3  and A cm  for a time sufficient only to transform ferrite to austenite and the carbide lamellal into fine globules, and quenched. Between the pearlite transformation and final hardening steps the steel may be cooled and possibly also cold worked. In a modification of the process the steel is simultaneously carburized at the initial austenitizing temperature. The rapid heating for hardening may be achieved by resistance or induction heating, or by use of two metal or salt baths in succession, the first providing pre-heating to just below A 1,3 . Suitable steels are
Patent GB-1083470-A (GB)
Title: Hardened epoxy resin and process of preparation
IPC: C08G59/42
Filed: 1964-12-23
Abstract: Epoxy resins are hardened with (A) a biaryl anhydride having at least one anhydride function on each aryl group and wherein the aryl groups are linked through a single carbon atom, using an anhydride/epoxide equivalent ratio of 0.4-0.65 or (B) the biaryl anhydride and maleic anhydride, the total anhydride/epoxide equivalent ratio being 0.4-1. The anhydride preferably contains less than 6 weight per cent of free acid.  The curable compositions may also contain diluents, fillers and accelerators such as tertiary amines and BF3.  Examples are given and the results compared with epoxy resins cured with other anhydrides used alone or in conjunction with the biaryl anhydride.
Patent GB-1246093-A (GB)
Title: Apparatus for casting molten substances
Inventor: PONTING ERIC JAMES
IPC: A45C15/06
Filed: 1967-11-16
Abstract: 1,246,093. Ingot casting machines. INGOT CASTING MACHINES Ltd. 14 Nov., 1968 [16 Nov., 1967], No. 52209/67. Heading B3F. An apparatus for casting molten metals comprises moulds in holders 24 carried around an endless conveyer 17, 18, means (not shown) for charging each mould in succession, means to spray the exteriors of the moulds with liquid coolant and means to strip the cooled substance from the moulds in succession. Each mould has a flange 31 overlapping and clamped to a flange 29 of its box-like container 24 in such a manner that nozzles (not shown) within each container can spray the whole external surface of the mould. The containers 24 are provided with rollers 35 which engage a rail 36 (of the machine) and with coolant inlets 47 as well as a coolant outlet 49 which is valve controlled and an outlet 48 which is always open. Each container 24 is pivotally mounted at 32 on a well 23, and tends to assume the vertical orientation shown at the left hand side of Fig. 2 when otherwise unretrained. The wells 23, supported on roller 25 and 27 are connected to the chains 17, 18 of a conveyer and are equally spaced therearound. A double-acting hydraulic cylinder 19 drives the wells 23 one position at a time by means of sprockets 15, 16 (Fig. 3) and a ratchet and pawl mechanism 20. Melt is poured into the moulds at the right of Fig. 2, where the moulds are constrained in the horizontal position by a rail 36a acting upon rollers 35. The cast ingot is cooled by coolant spraying the mould. The coolant is supplied from a pipe 37, and distributed by a rotary head 40 to flexible pipes (41) (not shown), thence to an endless main comprising flexible sections 43b and sections 43a connecting to each mould holder 24 by flexible pipes 46. When the moulds reach the end of the rail 36a (at the left of Fig. 2) they swing into the vertical position ejecting the cast ingot. At the same time valves 49 are opened and cooling is continued.
Patent GB-1153062-A (GB)
Title: Colourless Addition Copolymers Containing Epoxy Groups
IPC: A61K8/41
Filed: 1966-05-13
Abstract: 1,153,062. Copolymers containing glycidyl groups. L'OREAL. 13 May, 1966 [13 May, 1965; 20 April, 1966], No. 52411/68. Divided out of 1,153,061. Heading C3P. Colourless copolymers are obtained by heating a mixture of (i) vinyl acetate, (ii) N-vinylpyrrolidone and (iii) one or more of glycidyl acrylate, glycidyl methacrylate and allyl glycidyl ether in a solvent in the presence of a catalyst. The solvent may be dioxane, dimethylformamide or a ketone, and the catalyst may be benzoyl peroxide and/or azobisisobutyronitrile. The copolymers are used for forming coloured copolymers for use in hair lacquers (see Specification 1,153,061).
Patent GB-1208600-A (GB)
Title: Pressure vessels for containing nuclear reactors
IPC: G21C13/08
Filed: 1967-11-17
Abstract: 1,208,600. Reactor pressure vessels. ETUDES DE GENIE CIVIL ET DE TECHNIQUES INDUSTRIELLES. 17 Nov., 1967 [18 Nov., 1966], No. 52489/67. Heading G6C. In a nuclear reactor pressure vessel, an external concrete shell and an internal steel container are both formed of interengaging components which are held together by tendons passing through the concrete. The steel container is built from rings 8 and 12 and caps 7, interlocking at the joints 15, 16 which are sealed. The concrete wall 17, is formed by blocks 13 separated by joints 18 incorporating step 18a. Vertical tendons 23 are secured at shoulders 21 while the lower shoulder 22 rests on the support 27. The domed ends are prestressed by tendons 24, 25 anchored at 34 while horizontal prestressing is effected by tendons 28, anchored to vertical external ribs on the concrete wall, and disposed along helices.
Patent GB-1451982-A (GB)
Title: Oxidizing clay for pressure sensitive record materials
IPC: B41M5/155
Filed: 1974-12-04
Abstract: 1451982 Oxidising clay YARA ENG CORP 4 Dec 1974 [16 Sept 1974] 52514/74 Heading B1E [Also in Divisions Cl and D2] An oxidising clay suitable for use in pressure sensitive record materials consists of bentonite or montmorrillonite which has been acid-leached for at least 4 hours and which has cupric ions adsorbed thereon. In an example, bentonite is heated with aqueous H 2 SO 4  for 4 hours at 90C, filtered, re-slurried in CuCl 2  solution, filtered, rinsed and dried at 105C. The reactivity of the product with various amines is tabulated.