baber/WOPTO huggingface dataset:
Patent GB-1036074-A (GB)
Title: Process for preparing 2,5-diacylamino-3,6-diamino-1,4-benzoquinones
IPC: C07C233/00
Filed: 1963-12-20
Abstract: The invention comprises a process for preparing compounds of formula <FORM:1036074/C4-C5/1> wherein R is a C1-5 alkyl group by reaction of a compound of formula <FORM:1036074/C4-C5/2> with any ammonia in an anhydrous solvent or diluent.ALSO:The invention comprises a process for preparing compounds of formula <FORM:1036074/C2/1> wherein R is a C1- 5 alkyl group by reaction of compound of formula <FORM:1036074/C2/2> with dry ammonia in an anhydrous solvent or diluent.
Patent GB-1527745-A (GB)
Title: Indicating surface defects on material
IPC: G01N27/84
Filed: 1975-12-09
Abstract: 1527745 Coated particles SCHWEISSINDUSTRIE OERLIKON BUHRLE AG 9 Dec 1975 [10 Dec 1974 16 May 1975] 50517/75 Heading B2E [Also in Divisions C4 and G1] A particle 1 for use in magnetic flow detection (see Division Gl) is of iron with a first coating 2 of a lacquer e.g. a phenolic resin or an epoxy resin containing titanium dioxide and a second coating 3 e.g. an acrylic resin containing fluorescent pigment. Reflecting glass balls may be embedded in the second coating.
Patent GB-1333728-A (GB)
Title: Stable anionic polymer latices and method of preparation
IPC: C08G18/00
Filed: 1970-10-23
Abstract: 1333728 Polyurethane emulsions MINNESOTA MINING & MFG CO 23 Oct 1970 [24 Oct 1969] 50566/70 Heading C3R Aqueous latex of a polyurethane or polyurea is prepared by mixing together in an aqueous medium, comprising sufficient water to provide the continuous aqueous phase, which contains at least one of the following: (I) a compound containing two primary or secondary amine groups, at least one secondary or tertiary amino group and a -SO 2 O- or -COO- group, (II) a compound having an aromatic nucleus, the aromatic nucleus having a single primary or secondary amino group and a -SO 2 O- or -COO- group substituted thereon, (III) a compound having an aromatic nucleus, the aromatic nucleus having a -(CH 2 ) w -SO 2 - or -COO- group and 1 to 4 hydroxyl groups substituted thereon (w=0 or 1) and (IV) a sulphonated phenol/aldehyde condensate. To the aqueous medium is added an isocyanate terminated prepolymer containing 0-49% by weight of solvent and agitation is continued until the resulting particulate polymer has been emulsified. A chain extender may optionally be added and when the chain extender is a diamine, e.g. hydrazine, it is added to the aqueous medium after agitation has begun. In examples I is II may be 4-amino-1-naphthalene sulphonic acid sodium salt and IV may be 6-hydroxy-2-naphthalene sulphonic acid. The prepolymer may be formed by reacting 1 mole of polyoxypropylene glycol (M.W. 1000) with 2 moles of toluene diisocyanate. The emulsions may be prepared in a high speed homogenizer, agitation being continued until a constant particle size, e.g. <1 micron is obtained.
Patent GB-1530805-A (GB)
Title: Circuit arrangement for producing a current which is proportional to a reference voltage and to the conductance of a resistor
IPC: G05F3/22
Filed: 1975-12-11
Abstract: 1530805 Transistor amplifiers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 11 Dec 1975 [14 Dec 1974] 50818/75 Heading H3T A circuit for producing an output current I or I* which is proportional to a reference voltage U and to the conductance of a resistor 12, comprises transistors 1, 2 having coupled emitters and their collectors coupled by a first current mirror 4 so that their collector currents are maintained equal over at least a range of values of U and of the said conductance, the base of 2 being connected to U and the base of 1 being coupled to the emitter of a transistor 11 whose base is connected to the collector of 1, whose emitter is connected to the resistor 12 and whose collector is coupled to the emitter circuits of 1,2 via a pair of further current mirrors 14, 3 in cascade, the output current being coupled from 14 or 3. A resistor 23 compensates for the internal resistance 22 of the source 13 of voltage U so that the symmetry of the circuits of 1 and 2 ensures that the voltage at the base of 2 is equal to the voltage at the base of 1, and that the voltage across resistor 12 is equal to U, i.e. the collector current I 2  of 11 is proportional to the product of U and the conductance of 12. The current I 2  is reproduced in circuit 14, a transistor 18 being connected to supply the base currents of transistors 15, 16, 17; the base current of 18 itself is smaller than that of 15, 16 and 17 by a factor equal to the current gain of 18. Transistor 9 serves a similar purpose in circuit 4. A current I 3  equal to I 2  is fed from circuit 14 into circuit 3 and is used to control an output current I* equal and opposite to the output current I, and also to ensure that the sum I, of the emitter currents of transistors 1 and 2 is equal to 2I 2 . An emitter follower 34, 35 is included to reduce the dependence on current of the current gain of the loop. The base current of 11 being derived from the collector circuit of 1 is compensated for, either by making resistors 7 and 8 differ, or by making the emitter areas of transistors 5 and 6 differ, or by providing a transistor 30 carrying a current I 4  equal to I 2  which takes an equal base current from the collector circuit of transistor 2. A transistor 25 is provided for starting a current in transistor 11 when U is first applied. When currents are established the base of 11 is more positive than the bases of 1 or 2, and consequently 25 is turned off.
Patent GB-1117561-A (GB)
Title: Improvements in or relating to processes and plant for the fractionation of air
Inventor: PERVIER JAMES WILLERS
IPC: F25J5/00
Filed: 1963-12-24
Abstract: 1,117,561. Cold separation of air. AIR PRODUCTS Ltd. 29 Dec., 1964 [24 Dec., 1963; 11 Feb., 1964], Nos. 50896/63 and 5753/64. Heading F4P. The air feed to a rectification column 30 having been compressed to at least 125 p.s.i. and cooled and freed of water vapour and carbon dioxide in reversible paths 41 of a heat exchanger cooled by counter-flowing separated nitrogen and oxygen is divided into a major portion which is expanded in a turbine 16 thus producing cold and is added to the minor portion before passing to the high pressure stage of the column 30. Feed air leaving exchanger 42 is partly liquefied in a liquid oxygen cooled exchanger 18 and air vapour issuing from a phase separator 27 is warmed in a path 15 of exchanger 42 prior to expansion at 16 and subsequent addition to the liquid air withdrawn from separator 27. In a modification air leaving the cold end of exchanger 42 is divided into a first portion which is warmed and expanded at turbine 16 and into a second portion which is in part liquefied and thereafter added to the expanded portion prior to being fed to the column.
Patent GB-1446763-A (GB)
Title: Method of detaching stacks with leaky fuel elements in liquid- metal-cooled reactor and apparatus for effecting same
IPC: G21C17/04
Filed: 1973-11-02
Abstract: 1446763 Monitoring nuclear reactors N N ARISTARKHOV I A EFIMOV B I ZAITSEV I G PETERS B S TYMOSH V S FILONOV A L SHAROV A I SHILDIN G S BALASHOVA N I BETS S A SKVORTSOV V S YAKOVLEVA I I ZHUCHKOV V S GORJUNOV V A PETROV V P KEVROLEV V N RYBAKOV and N D TVERDOVSKY 2 Nov 1973 51046/73 Heading G6C A nuclear reactor BCD system, suitable for a liquid-metal cooled reactor, comprises a sampler tube 14 which can be positioned successively over fuel bundles 8, and a tube 22 by which an inert scrubbing gas can be passed into the interior of tube 14 to entrain gaseous fission products in the coolant 9 therein, the gases being drawn off and supplied to a detector 21. In the embodiment shown, the tube 14 is positioned through a bore in a plug 4 which is rotatably and eccentrically mounted in a second rotatable plug 3, when the system is to be put into use. The tube 14 is lowered, by a drive 12, until a lower seal 19 abuts a chosen bundle 8 whereby a body of coolant is trapped above bundle 8 and within tube 14. Inert gas supplied by doser 24 debouches from tube 22 below the surface of the trapped coolant so as to bubble up through the latter thereby entraining any coolant-borne fission products released into the trapped coolant from any burst cartridge in the bundle 8. The bundles are checked in succession by repeating the procedure after tube 14 has been repositioned by appropriate rotation of the plug 3 and/or 4. This embodiment is intended to be used in the instance that circulation of coolant in the reactor has ceased and steadystate conditions have been reached. In another embodiment (Fig. 4, not shown) intended for use in the instance that forced coolant circulation is continued during the tests, the lower part of the tube 14 embodies an upwardly convergent nozzle (30) through which coolant issuing from the bundle 8 under test sprays into the tube 14 to be mixed with the inert gas which is supplied to the space above the nozzle. A baffle (31) above the nozzle acts to enhance droplet formation in the coolant issuing from the nozzle.
Patent GB-1527996-A (GB)
Title: Hydraulic force amplifier and steering installation provided with such a force amplifier
IPC: F15B9/10
Filed: 1975-12-15
Abstract: 1527996 Fluid-pressure servomotor systems SLO-RID B V 15 Dec 1975 [18 Dec 1974] 51199/75 Heading G3P [Also in Division B7] Spaces 17, 18 at opposite sides of a piston 2 communicate through passages 15, 16 in a pistonrod 3 with a valve 4 surrounding the rod and axially displaceable from a neutral position to connect one of the spaces with a pressure supply 25 and the other with an exhaust 26 so that the piston is displaced until equilibrium is restored. In the neutral position of the valve, flow from the supply 25 passes continuously to the exhaust 26 through ports 28, 31 in the valve and an annular groove 24 in the piston-rod. When the valve is axially displaced in relation to the rod, this flow-path is interrupted and further ports 27, 29, 30 and 32 establish flow through the passages 15, 16. In the preferred embodiment, the piston-rod is connected at 38 to a planet gear meshing with a fixed ring gear and a sun gear secured to a rudder 53. A second planet gear may be operated by a second piston-rod 48 having its cylinder 45 cross-coupled to the cylinder 1 of the first rod.
Patent GB-1499290-A (GB)
Title: Cast iron
IPC: C21D5/04
Filed: 1976-12-10
Abstract: 1499290 White cast iron NORANDA MINES Ltd 10 Dec 1976 [13 Sept 1976] 51687/76 Heading C7A A wear-resistant low alloy white cast iron, suitable as ore grinding balls, with a high hardness consists of C 2-4 Si 0À3-1À5 Mn 0À5-1À5 Cu 0À5-1À5 Mo 0À25-1À0 Fe Balance plus usual impurities. The alloy is produced by normal melting, casting into molds (sand or chill) and removing at >750 C prior to quenching at a rate of 2-15C/sec. The castings are then heat treated at 200-400C (pref. 260C) for 1-8 hrs (pref. 4 hrs) to produce a carbide and martenite structure with optimum hardness and wear resistance.
Patent GB-1518248-A (GB)
Title: Pilot signal processing systems for video recording apparatus
IPC: H04N9/793
Filed: 1976-12-13
Abstract: 1518248 APC systems AMPEX CORP 13 Dec 1976 [19 March 1976] 51975/76 Heading H3A In a video recording reproducing apparatus (Fig. 1 not shown) utilizing a pilot signal included in the video signal for effecting continuous correction of errors in chrominance, time base, etc., produced by variations in the relative movement between the record medium and the transducing heads, an arrangement for processing the pilot signal so that it accurately reflects the phase and frequency distortion introduced by the record reproduce process comprises an element 66 for recovering the pilot signal from the composite video signal and introducing a phase distortion related to frequency variations of the pilot signal caused by velocity error in the transducing process and a phase shifter 148 for adjusting the phase of the pilot signal in response to an applied control voltage. The control voltage may be derived from the recovered pilot by a frequency discriminator 98 and a filter 105. A phase comparator 162 applies a further control signal to 148 for phase locking of the pilot with the colour burst of the video signal and also for phase compensation of accumulated errors in other parts of the arrangement. The apparatus preferably employs two or more switched transducing heads for processing of the video signal and the pilot processor of Fig. 2 provides a chroma amplitude correction signal at 60, a luminance correction signal at 56 and a colour sub-carrier at 58 for time base error correction of the video signal.
Patent GB-1413108-A (GB)
Title: Hydraulic motors
IPC: F03C1/247
Filed: 1971-11-09
Abstract: 1413108 Hydraulic reciprocating motors RENOLD Ltd 6 Nov 1972 [9 Nov 1971] 52039/71 Heading F1A In a hydraulic motor wherein fluid is alternately supplied to and exhausted from radial cylinders 51 each containing a piston 60 carrying a roller follower 63 which co-operates with an internally lobed cam track 27, each roller is retained in a part cylindrical recess 61 in the end of its piston. Each recess 61 extends through an angle greater than 180 degrees whereby to retain its roller captive. The rollers are prevented from moving axially out of their recesses 61 by steel rings 201, 202 mounted in discontinuous recesses extending around the inside of stationary casing halves 22, 25. Each recess 61 is lined with a plastics material based on acetal, polyvinylidene fluoride, polysulphone,polyamide or polyimide supported on a metal backing strip having a layer of sintered bronze to provide a key. The rollers may be solid, hollow or tubular. In order to allow the motor to freewheel, fluid may be supplied to the casing 22, 25 to force the pistons into their cylinders. Fluid is supplied to and exhausted from the cylinders 51 through a pintle 1 described in detail in Specification 1413107.
Patent GB-1368301-A (GB)
Title: Turbidimeters
IPC: G01N21/53
Filed: 1971-11-10
Abstract: 1368301 Photo-electric turbidity measurement MONITOR TECHNOLOGY Inc 10 Nov 1971 [25 Nov 1970] 52246/71 Heading G1A In an apparatus for measuring the turbidity of a flowing fluid in a chamber 10, in which photocells 36 and 40 monitor transmitted and scattered radiation respectively to provide outputs which are combined at 50 to provide at 52 a measure of turbidity, spatial filtering means 38, 42 ensure that photo-cell 40 receives only forward scattered radiation from a predetermined portion 44 of the irradiating beam. Light, I.R. or U.V. from a laser or filament lamp 24 is preferably shaped at 24 into a ribbonshaped beam, Fig. 2 (not shown) whose smallest dimension is parallel to the direction of fluidflow. For calibration purposes shutter 54 is lifted and a known proportion of the source output is directed along path 31 to photo-cell 40. Using a ribbon-shaped beam bubbles pass relatively quickly therethrough to produce spikes (64) on the recorder trace, Fig. 4 (not shown). These may be removed using an integrating circuit, Fig. 5 (not shown) or may be used to derive the bubble size. The turbidimeter may be used to monitor an industrial filter operation, Fig. 6 (not shown). The liquid output from a filter 82 passes through the apparatus before flowing to waste. If the turbidimeter output, which may be demodulated and displayed on a meter, exceeds a threshold an alarm is actuated to summon an operator. Alternatively valves are actuated to recirculate the liquid until the filter self-heals with the assistance of a filter aid tank.
Patent GB-1118839-A (GB)
Title: Polytetrafluoroethylene molding powder
IPC: C08K3/28
Filed: 1966-11-22
Abstract: A moulding powder consist of non-greying (and non-specking) polyetetrafluoroethylene and from 2 to 110 p.p.m. based on the weight of said polytetrafluoroethylene of Ca(NO3)2, Sr(NO3)2, Ba(NO3)2, Pt(NO3)2, Ba(ClO3)2 or Ba(ClO4)2. The polytetrafluoroethylene may be prepared by polymerizing tetrafluoroethylene in an aqueous solution having a pH of at least 7 and containing a free radical initiator, from 150 to 650 p.p.m., liquid weight, of ammonium ion derived from a basic ammonium compound, and less than 50 p.p.m., liquid weight, of dissolved metal.  In an example, tetrafluoroethylene is polymerized using ammonium carbonate and ammonium persulphate, and the polymer is comminuted.  In further examples, the compositions are made by making a slurry of the metal salt and polymer powder in water.
Patent GB-1069373-A (GB)
Title: Improvements in and relating to friction clutches
Inventor: BASSETT NORMAN EDGAR
IPC: F16D23/14
Filed: 1964-12-29
Abstract: 1,069,373. Friction clutches. AUTOMOTIVE PRODUCTS CO. Ltd. Dec. 16, 1965 [Dec, 29. 1964], No. 52654/64. Heading F2C. In a diaphragm spring friction clutch, wherein the ends of radially inwardly directed tongues 6 of a diaphragm spring 1 are held between crowned portions of an annular rib 7 of a thrust ring 2, transmitting thrust from a release bearing, and the outer edge of a Belleville washer 3, the inner edge of the Belleville washer is retained in an annular groove 10 in an annular extension 9 of the thrust ring 2. The thrust ring has projections 8 on the rib 7 engaging diaphragm spring slots 5 between the tongues 6. The thrust ring may be of cast iron or sintered material or a coined steel forging. The outer periphery of the thrust ring may be circular or, particularly to reduce or eliminate " squeal " when the ring is of sintered material, have peripheral flats.
Patent GB-1186488-A (GB)
Title: Apparatus for Stripping Brussels Sprouts
Inventor: GIUSTI ALDO JOHN
IPC: A23N15/01
Filed: 1968-11-07
Abstract: 1,186,488. Apparatus for stripping Brussels sprouts. A. J. GIUSTI. 7 Nov., 1968, No. 52856/68. Heading A4C. An apparatus for stripping Brussels sprouts comprises a cutter A which is vibrated in a rapid back and forth rectilinear manner by a vibrator B. The cutter A, which is semi-cylindrical in crosssection, comprises a cutting edge 14 at its forward end, a deflecting shield D on its upper exterior surface, a concave lower face 12 forming a stalk guide surface, provided with parallel raised ribs (20), Fig. 3 (not shown), to prevent the cutting edge 14 from gouging into the main stalk 13 of the Brussels sprout plant as it is advanced manually towards the cutter. The cutter is secured at the top end of a bar 11, the other end of which is attached to the vibrator, which may take the form of a conventional sander. Also attached to the vibrator is a bracket 19 having two auxiliary cutters (A<SP>1</SP>) which are cylindrical in cross-section and have guide surfaces and cutting edges similar in design to those of cutter A, mounted thereon. The vibrator is connected at its rear end to a supporting frame E via a clamp 29 securing the vibrator handle 28 to a bracket 27. The bracket 27 being pivotable about bolt 26 so as to vary the inclination of the vibrator and cutter. The frame E comprises legs 21 and sill plates 22 and longitudinal and transverse frame members 23 and 24. A grill F, comprising a series of parallel spaced bars 36 and a supporting frame 37 is mounted below the cutter, in the frame E, so that stripped sprouts and other debris may be separated. The grill is pivoted about bolt 45 and lies in an inclined position, the angle of which can be varied so that various sizes of bins 44 may be used to collect the falling stripped sprouts. Baffle plates are provided on the grill F so as to direct the sprouts into the bin. Also access to the cutter A is unimpeded.
Patent GB-1319300-A (GB)
Title: Continuous manufacture of dichloroisocyanuric acid
IPC: F41H5/04
Filed: 1970-11-06
Abstract: 1319300 Dichloroisocyanuric acid BADISCHE ANILIN- & SODA-FABRIK AG 6 Nov 1970 [8 Nov 1969] 52880/70 Heading C2C Dichloroisocyanuric acid is produced by continuous chlorination of cyanuric acid in aqueous alkaline solution in a reactor, the ratio of reactor length to inside diameter at any point being 50 to 200 : 1, the initial reaction temperature being 20 to 100 C., the final reaction temperature being - 10 to 50 C., the rate of flow of the reaction mixture being 0À4 to 4À5 m/sec., the molar ratio of alkali (calculated as hydroxide) to cyanuric acid being 2 to 2À4 : 1 and the molar ratio of chlorine to cyanuric acid being 2 to 100 : 1.
Patent GB-1397484-A (GB)
Title: Network for the conversion of analogue and digital values
IPC: H03M1/00
Filed: 1973-11-16
Abstract: 1397484 Digital to analogue converters HOTTINGER BALDWIN MESSTECHNIK GmbH 16 Nov 1973 [17 Nov 1972] 53338/73 Heading G4H In a digital to analogue converter each bit of the digital code contributes to the analogue output signal an amount less than " 1 " plus the sum of the amounts contributed by the bits defining the next lower numerical value; " 1 " being the amount contributed by the least significant bit. For a binary digital input code, the bits may be weighted according to a geometric progression of ratio 1À90 to 1À99 (or otherwise between 1 and 2). In Fig. 4, the ratio is 1À95. In Fig. 5, Rp = 100 K, Rr = 48À7 K, Ra = 97À6 K, giving a ratio of 1-98. Thus when incrementing by 1 from, e.g., 01111 it is necessary to switch in one or more lower order bits as well to achieve the desired unity change in the analogue output. Because of this, not all possible digital combinations are available but no gaps occur in the analogue spectrum even if a highly significant bit stage has a weighting error of 5%. The invention is particularly useful in systems having a feedback loop containing an A-D and a D-A converter, e.g. for measuring peak values, Fig. 7 (not shown) or for taring, Fig. 8 (not shown).
Patent GB-1222720-A (GB)
Title: Improvements in or relating to methods of and apparatus for manufacturing magnetic storage discs
Inventor: KLEINBECK ERWIN FRIEDRICH
IPC: G11B5/73
Filed: 1968-11-12
Abstract: 1,222,720. Laminates; moulding plastic substances. INTERNATIONAL BUSINESS MACHINES CORP. 12 Nov., 1968 [11 Dec., 1967], No. 53518/68. Headings B5A and B5N. [Also in Division H1] A magnetic storage disc is made by moulding a carrier from a thermosetting plastic and a filler in a die having at least one flat surface, forming a magnetic coating on the flat surface, testing the coating for defects, and pressing it on to the pre-formed carrier. The flat surfaces may consist of removable glass or " hard metal " (e.g. tungsten carbide) rings, which are inserted in the die body after coating with magnetic material and a parting compound. The step of forming the magnetic coating on the die surface may take the form of inserting in the die a magnetically coated plastics substrate. Specified magnetic coatings are Fe 2 O 3  and Co-Ni alloy, while the carrier may be formed of epoxy-resin filled with glass fibre or paper. In one embodiment, a die 1a, 1b is provided with polished rings 2a, 2b retained by rings 5a, 5b. A sealing ring 6 engages with groove 7 and a guide core 8 engages with bore 9. A preformed carrier 3 is shown bearing magnetic coatings 10.
Patent GB-1458203-A (GB)
Title: Production of shaped articles with a cellular structure
IPC: C08J9/28
Filed: 1973-11-19
Abstract: 1458203 Laminates G WILL 19 Nov 1973 [17 Nov 1972 15 Jan 1973] 53652/73 Heading B5N [Also in Divisions B2 and C3] An emulsion of water dispersed in an unsaturated polyester/styrene mixture is placed between two glass or sisal fibre mats in a mould and the styrene is copolymerized with the polyester to form a plate.
Patent GB-1451221-A (GB)
Title: Manufacture of reinforced cellular concrete
IPC: C09D1/06
Filed: 1973-11-20
Abstract: 1451221 Reinforced cellular concrete INTERNATIONELLA SIPOREX AB 20 Nov 1973 [20 Nov 1972] 53830/73 Heading C1H [Also in Division E1] Reinforced cellular concrete is made by coating at least one reinforcing element, e.g. of steel, with an aqueous slurry comprising an hydraulic cement acid from 1 to 55% by weight (based on the weight of hydraulic cement) of an ethylene/vinyl acetate copolymer, drying the coating, casting cellular concrete while incorporating therein the coated element(s) and subjecting the product to steam curing. The slurry may also contain high M.W. organic substances such as hydroxy-ethyl cellulose, casein, PVA, methyl cellulose and carbony methyl cellulose.