baber/WOPTO huggingface dataset:
Patent GB-1307662-A (GB)
Title: Slurry explosive compositions
IPC: C06B47/14
Filed: 1971-01-21
Abstract: 1307662 Explosive compositions IMPERIAL CHEMICAL INDUSTRIES Ltd 21 Dec 1971 [21 Jan 1971] 2867/71 Heading C1D A slurry explosive comprises an inorganic oxygen-supplying salt, a solvent for the salt, a thickener, a fuel, and, as a density control agent, N,N<SP>1</SP>-dinitroso-pentamethylenetetramine which reacts under acidic conditions to form gaseous products. The salt may be ammonium nitrate or sodium, potassium, barium or calcium nitrate, and the solvent water, formamide, dimethylsulphoxide, or ethylene glycol. Fuels specified are Al, Al alloy, Si, ferrosilicon, ferrophosphorus, TNT, PETN, RDX, nitrocellulose, nitrostarch, isopropyl nitrate, sulphur, carbon, urea, thiourea, and sugar. Suitable thickeners are guar gum, carob seed gum, hydroxyethyl cellulose, tamarind flour, and starch; these may be cross-linked with potassium pyroantimonate or chromates, with or without potassium antimony tartrate. A further ingredient in the examples is diethyldiphenylurea. The pH of the slurry may be adjusted by adding zinc nitrate, ammonium hydroxide or an amine. Reduced density and increased sensitivity are maintained over long storage periods.
Patent GB-1308655-A (GB)
Title: Method of and machine for use in the construction of the gates in  long-wall coal mining
IPC: E21D9/10
Filed: 1970-05-14
Abstract: 1308655 Ripping methods and machines JOY MFG CO (UK) Ltd 12 Aug 1971 [14 May 1970] 23321/70 Heading E1F As a gate is advanced in a longwall mineralmining system by cutting out the gate space above a mineral seam in advance of the seam whilst the seam is being mined, stone dust created in the gate space during excavation of the space is contained in the air of the space and is drawn off with the air for the stone dust to be removed from the air, which clean air is then discharged into the ventilating air of the mine. The space is cut out by one or more power driven drum or disc cutters 14, 16 of a machine having behind the cutter(s) 14, 16 a shroud 22, 22a through or past which normal ventilating or pressurised air may pass and through one or more outlets 23 in which dust laden air may be withdrawn from the space to a dust extractor which removes the dust from the air before the air is discharged into the mine workings. Water may be sprayed into the gate space from means associated with the shroud. Preferably the machine has an anchorable frame, a carriage laterally and longitudinally movable of the frame, a motor on the carriage, a gear box power rotatable about the output shaft of the motor, a cutter drum mounted on the inner gear box shaft and drive sprockets on the outer gear box shaft. The drive sprockets drive cutter chains driving a cutter drum at the outer end of a jib rotatable with the gear box. A settable roof support system and power loading means for removal of rock from the gate space, and means for causing step wise advance of the frame are incorporated in the structure of the machine.
Patent GB-1314169-A (GB)
Title: Welding
IPC: B23K9/00
Filed: 1969-07-23
Abstract: 1314169 Welding by fusion and pressure HAWKER SIDDELEY AVIATION Ltd 3 July 1970 [23 July 1969] 37125/69 Heading B3R In vertical or horizontal rectilinear welding, e.g. of stringers to aircraft panels, compensation for shrinkage of weld metal is provided by holding each workpiece component under tension in the direction of the weld seam during welding. The welding may be TIG, MIG, plasma, metal, or submerged arc, electron beam, or resistance. The tension may be such as to apply a stress up to 90% of the yield point of the workpiece material and may be applied by means, e.g. a compensating spring or hydraulic system, maintaining constant stress regardless of workpiece thermal expansion or contraction. In Fig. 1, the workpiece components, comprising angle section stringers 11 and a metal sheet 12, are held, by clamp bars 15, and tensioned, by hydraulic jacks 14, in a frame which is upwardly moved, in vertical guides 16 past a welding held 18. The latter is transversely movable on a stationary rail 19 for welding at different positions across the workpiece. Welding may be by fillet on the stringer side or by through welds on the opposite side of the sheet. The welding process may additionally include holding the workpiece components together at the welding region by drawing them locally through a die clamp either prior to or during a fusion welding operation. Either the die or the workpiece may be moved. In welding U-section stringers 21 to a titanium alloy aircraft panel 20, the workpiece components under tension are drawn through a TIG welding head and die clamp assembly, Fig. 5, the welding being effected through the panel. The head comprises upper and lower clamping blocks 23, 24. Electrodes 28 are housed in torch blocks 23A, 23B insulated at 31 from each other and the upper block 23. A spring-pressed platen 26 in the lower block 24 urges the stringer against the panel. Shielding argon is fed to the torches, and through lower block passages 33 and the stringer interior, and cooling water is fed through upper and lower block passages 32. In welding stringers not parallel to the panel centre line, the welding head and die clamp is traversed simultaneously longitudinally and transversely.
Patent GB-1314380-A (GB)
Title: Lawn mowers
IPC: A01D34/54
Filed: 1970-08-28
Abstract: 1314380 Lawn mowers QUALCAST (LAWN MOWERS) Ltd 27 Aug 1971 [28 Aug 1970] 7629/72 Divided out of 1314377 Heading A1F The subject-matter of this specification is included in that described in Specification 1314377, but the claims are concerned with the speed of the cutting cylinder which is driven by an electric motor.
Patent GB-1316099-A (GB)
Title: Penicillian esters
IPC: C07D499/32
Filed: 1969-05-20
Abstract: 1316099 Penicillin esters GLAXO LABORATORIES Ltd 15 May 1970 [20 May 1969 18 July 1969] 25746/69 and 36385/69 Heading C2A An ester of a penicillin with an alcohol is prepared by reacting a penicillanic acid salt with a haloformic (viz. chloroformic or bromoformic) acid ester of the alcohol in an inert, substantially anhydrous organic solvent at a temperature in the range - 20‹ to + 30‹ C. in the absence of any base other than is necessary to bring the penicillanic acid salt into solution, whereby a mixed anhydride is formed, and decarboxylating the mixed anhydride by contacting it with an aromatic heterocyclic tertiary amine base in the presence of haloformic acid ester and water, thereby yielding the ester of the penicillanic acid with the alcohol. The penicillanic acid salt may have the formula wherein R<SP>1</SP>CO is an acyl group, e.g. phenylacetyl or phenoxyacetyl; R<SP>2</SP> is an alkali metal atom, e.g. sodium or potassium, or an organic ammonium group, e.g. triethylammonium, piperidinium, N-ethylpiperidinium or benzylammonium; and Z is S, SO or SO 2 . The alcohol may be a 2,2,2-trihalogenoethanol such as 2,2,2-trichloroethanol. The organic solvent may be a halogenated hydrocarbon (e.g. methylene chloride, chloroform or 1,2-dichloroethane), a ketone (e.g. acetone), an aromatic hydrocarbon (e.g. benzene) or an ether (e.g. tetrahydrofuran). The decarboxylation reaction may be effected at a temperature from- 20‹ to + 50‹ C. by adding the solution of the mixed anhydride to the tertiary amine base or to a solution thereof in an inert organic solvent. The tertiary amine base may be pyridine, quinoline, isoquinoline, an alkyl substituted pyridine or quinoline, e.g. a picoline, lutidine or methyl quinoline which may be employed in an amount of from 0À25 molar equivalents upwards calculated on the penicillin compound. Water and/or a hydroxylic organic material such as 2,2,2-trichloroethanol or methanol may be added to the decarboxylation reaction system to encrease the yield of the ester. Preferably from 0À1 to 0À9 molar equivalents of haloformate are present during the decarboxylation reaction. If Z is S, the resulting ester may be oxidized to a corresponding compound wherein Z is SO before the ester is recovered from the reaction mixture.
Patent GB-1318400-A (GB)
Title: Mass spectrometry
IPC: H01J49/10
Filed: 1970-08-28
Abstract: 1318400 Mass spectrometers ASSOCIATED ELECTRICAL INDUSTRIES Ltd 26 Aug 1971 [28 Aug 1970] 41519/70 Heading H1D A mass spectrometry method comprises time division multiplexing a plurality of ion beams, e.g. from sources 1, 2, on a collinear array, to form a single beam to be analysed in a mass spectrometer (12) (Fig. 1, not shown), the mass spectrometer output at any time representing the passage of ions of a given mass to change ratio, to provide data on the plurality of beams. The output of the mass spectrometer may be sampled and digitized preferably by a digital computer further programmed to account for the multiplexing. Preferably the mass spectrometer is a scanning type and analyses a range of mass to charge ratios, in which case the multiplexing is preferably at a rate to sample individual peaks several times. The time divisions may be unequal to vary the relative sensitivities of the ion collections of the respective beams, the single beam focussing may be changed to vary the resolution, and the spectrometer may be single or double focusing, with magnetic sector and B and E sector respectively, time of flight, cycloidal focusing, or quadrupole type. Mass marking may be performed by including one or more reference substances separately or with the examined substance, e.g. hoptacosa fluorotributylamine and perfluorokerosene. The multiplexing may be by a plurality of pairs of plates (e.g. 20, 22) at different interlaced voltages and/or a hexapole ion beam deflecting arrangement, the multiplexing deflecting system being at the point of beam intersection. Ions striking detector (14) may be amplified by an electron multiplier. Data processing unit (16) may demultiplex the signal to form individual analyses, synchronizing link (18) being utilized, but not being necessary if unit (16) is sensitive to the beam switching or if detector (14) is so sensitive and informs unit (16), or may be programmed digital computer sampling at least once during each time division (cf. Fig. 2). Deflector fringe field correcting plates 36, 38 may be adjacent cylindrical beam deflector 30, the latter being earthed on beam 2 passage and multiplexing being via changeover switch 26 which is preferably a semi-conductor type. Reference is made to Specifications 1,161,432, 1,233,812 and 1,318,200.
Patent GB-1320677-A (GB)
Title: Plumb-bob
IPC: G01C15/10
Filed: 1971-01-20
Abstract: 1320677 Plumb-bob FLORIN Ltd 15 Oct 1971 [20 Jan 1971] 2824/71 Heading G1F A plumb-bob comprises a plastics container 1 having a reservoir for high density material 9. A closure 22 co-operates with a disc 3 to enclose the material 9, the closure 22 having an aperture 6 through which a cord 5 is threaded. A removeable metal point 4 may, in a modification, be replaced by a moulded plastics point. The closure 22 snap-fits over a co-operating container rim 7, as shown, or may, be screw-threaded, welded or adhered to the container 1. The point 4 screws in to an aperture 10 or may be a push fit. In a modification, the disc 3 is omitted, a closure 22 not having aperture 25. The material 9 comprises metal shot, a cast or machined slug or a metallic tube. The container may be formed by dip coating a slug.
Patent GB-1320920-A (GB)
Title: Fuel injection nozzle units
IPC: F02M61/20
Filed: 1969-11-12
Abstract: 1320920 Fuel injection nozzles C A V Ltd 20 Oct 1970 [12 Nov 1969] 55391/69 Heading F1B A fuel injection nozzle unit comprises a resiliently-loaded stop 19 for a resiliently loaded valve member 16 which is moved by fuel pressure away from its seating 15 to permit restricted fuelflow through orifice 14 when the valve member contacts the stop and a resiliently loaded piston 17 which moves under fuel pressure to limit the rise in fuel pressure to a desired value at which it moves the valve member 16 and stop 19 further to permit unrestricted fuel-flow. A further stop 22 limits movement of the valve member by the piston.
Patent GB-1322897-A (GB)
Title: Automatic steering arrangements
IPC: G08C19/46
Filed: 1969-09-12
Abstract: 1322897 Automatic steering control E M I Ltd 7 Sept 1970 [12 Sept 1969] 45014/69 Heading G3R In an automatic steering system, signals are applied to an angle resolver, the output of which controls the steering and the rotor of which is coupled to the steering to ensure proportionality between the steering angle and the ends. As applied to the automatic steering of an eightwheel container carrier, pairs of coils 18, 19 and 20, 21 are respectively fixed at positions 13 and 12 relative to one of the front wheels 1 so that they are equally spaced on each side of a buried conductor (not shown) carrying AC and defining a route to be followed by the carrier. Coils 18 and 20 are connected together so that the voltages induced in them subtract and coils 19 and 21 are connected together so that the voltages induced in them add. The two resultants are amplified and applied to rotor windings 24, 25 of an electromagnetic resolver so that deviation from the route produces an output of corresponding magnitude and sense from a phase sensitive detector 30 supplied by amplified signals from resolver stator windings 26 and 27 and which controls an hydraulic actuator 5 to correct the course of the carrier by turning wheel 1 about a vertical axis. When wheel 1 turns, it moves resolver rotor 15 through a flexible link 16/17 to provide follow-up and ensure correspondence between the angle of turn and the magnitude of the error. The other wheels of the carrier are coupled to wheel 1 so that they move through suitable angles to facilitate a turn. Sensitivity may be maintained constant despite changes of coil height by automatically controlling the amplification of signals from stator winding 27 in dependence on the output from stator winding 26. In an alternative arrangement, the coil voltages may be applied to the resolver stator windings and the output taken from the resolver rotor windings.
Patent GB-1329066-A (GB)
Title: Locking devices for use in faired hubs of bladed rotor assemb lies
IPC: F16D1/06
Filed: 1972-01-13
Abstract: 1329066 Mounting bladed rotors on shafts ROLLS-ROYCE (1971) Ltd 13 Jan 1972 1560/72 Heading F2U A rotor assembly 10 comprises a bladed hub 16 secured to a shaft 18 by a part (e.g. bolt 20) to which is attached a locking device 22 with a continuously streamlined surface 46 attached (e.g. by teeth 52, 54) to the hub, the device 22 being connected to the securing part by means (e.g. splines 36, 42 and a spherical recess 50 and resilient enlargement 45) internal of the surface 46. The hub may be connected to the shaft by splines 26. The locking device 22 may have a tapped hole 56 for engagement by an extractor bolt. This hole being normally filled by a streamlined plug.
Patent GB-1330266-A (GB)
Title: Copolymerization process
IPC: C08F2/22
Filed: 1972-03-28
Abstract: 1330266 Emulsion polymerization of unsaturated hydroxyesters SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 28 March 1972 14511/72 Addition to 1266159 Heading C3P The invention is a modification of that in Specification 1,266,159. It comprises a batch process for emulsion copolymerizing (A) a hydroxy group containing ester of formula wherein R is an alpha,beta-ethylenically unsaturated group, and R<SP>1</SP> is a group free of ethylenic unsaturation, with (B) at least one other ethylenically unsaturated monomer, the comonomers and initiator being continuously or intermittently added during polymerization to a vessel heated to polymerization temperature, the process being characterized by the fact that a minor amount of a polymerization inhibitor (relative to total initiator) is already present in the aqueous phase in the reactor at the beginning of the polymerization. Group R-C(O)- of monomer (A) may be derived from acids such as acrylic, methacrylic, crotonic, cinnamic, maleic and fumaric acids, and group R<SP>1</SP>-C(O)- may be derived from saturated acids such as p-tert-butyl benzoic, butyric and lauric, and also saturated acids having a tertiary alpha carbon atom, especially those of formula wherein R 1  is -CH 3  and R 2  and R 3  are C 1-16  alkyl. Examples of these are pivalic, alpha,- alpha-di-methyl decanoic, and alpha,alpha-dimethyl hexadecanoic acids. Examples of (B) are ethylene, styrene, vinylidene chloride, dibutylmaleate, vinyl acetate methyl methacrylate and vinyl chloride. The latter is preferred and exemplified in the example in which it is copolymerized with in which R<SP>1</SP> is a C 9-11  tertiary alkyl group. Inhibitors specified are benzoquinone, hydroquinone, nitro- and nitroso benzene, toluhydroquinone, duroquinone, p-dinitrobenzene and, in particular, 4-hydroxyanisole. The usual initiators and emulsifiers are used. In the example, the copolymer emulsion produced is made into a curable paint by admixture with a melamine/ formaldehyde resin, TiO 2 , dibutyltin dimaleate, maleic acid, and methylisobutyl ketone.
Patent GB-1331561-A (GB)
Title: Treatment of gases
IPC: C01B17/04
Filed: 1972-02-29
Abstract: 1331561 SO 2  removal from gaseous effluents BRITISH GAS CORP 29 Feb 1972 6552/71 Heading C1A SO 2  is removed from an effluent gas stream by passing a major portion of the stream together with H 2  over a first catalyst bed thereby producing a gas stream containing H 2 S, and then passing this stream together with air and the remaining minor portion of the effluent stream over a second catalyst bed thereby converting the SO 2  and some of the H 2 S and into elemental S, condensing the S formed and then passing the resulting H 2 S stream to an H 2 S stripping stage. The first and second catalyst beds may be a catalyst of NiO-MoO 3 , CoO 3 -MoO 3 , uraniathoria, urania-MoO 3  or mixtures thereof on a support. The preferred catalysts are NiO (1-5%)-MoO 3  (3-10%); CoO (1-4%)- MoO 3  (11-16%); MoO 3  (1-20%)-urania (2-15%); the percentages being calc. as the wt. of the metal based on the total wt. of the catalyst. The supports may be active Al 2 O 3 , bauxite, corundum, silica, kaolin, powdered brick, and/or alkaline earth metal oxide. The temp. of the catalyst beds is preferably 300- 350‹ C. The H 2 S stripping step may be carried out by passing the gas stream over ZnO or washing the gas with a soln. of sodium vanadate and the disodium salt of anthraquinone disuiphonic acid. The SO 2  effluent containing, e.g. 10-15% SO 2 , may be that obtained by removal of the S content of fuel oils by means of heating the oil in a fluidized bed of active CaO granules, CaS being formed and the S then removed as SO 2  from the CaS by heating in a second fluidized bed supplied with air, the CaO then being recycled to the first bed. The major stream may contain 75% of the total effluent gas. The remaining 25% is preferably contacted with the H 2 S stream from the first catlyst bed and air in a water condenser prior to being reheated and passed through the second catalyst bed.
Patent GB-1339499-A (GB)
Title: Hookes type universal joints
IPC: F16D3/41
Filed: 1971-03-31
Abstract: 1339499 Universal joints GKN TRANSMISSIONS Ltd 22 March 1972 [31 March 1971] 8348/71 Heading F2U A method of fitting replacement needlebearing cups to the yokes of a single or double Hooke's joint, particularly on a motor-vehicle propeller shaft, of the kind in which the cups are retained by staking the yoke-bore to provide a number (eight) of circumferentially spaced abutments, comprises counterboring the yoke bore to remove the stakes and form a datum surface e.g. shoulder 22, Fig. 2, determined by the existing bearing cup 9, withdrawal of the existing cup 9; inserting the replacement cup 26, Fig. 3, and staking the bore to provide cup-retaining abutments 29 positioned with reference to the datum surface 22. A base washer 30, separate or welded to the cup, registers with the shoulder 22 and may be inwardly curved at its outer periphery. During the staking operation an adjustable caliper (65, Fig. 6, not shown) prestresses the yoke-arms outwards to prevent inward deflection. A tool for performing the above operations is in the form of a pedestal press, Fig. 6, not shown, the lower anvil of which has a spigot to engage the lower bore of one yoke and an adjustable lateral extension to support the attached propeller shaft, whilst the upper limb of the press is bored to receive either a hand or power driven face cutter for the counterboring, or a hammerdriven press-tool for the staking. Axial load for the counterbore cutter is provided by a dead weight (40a) on a lever arm (40), and the counterbore depth is limited by engagement of the cutter with the hardened base of the existing cup, or by a spring-loaded feeler.
Patent GB-1340853-A (GB)
Title: Liquid heating units control means for such units and vessels incorporating heating units
IPC: A47J31/18
Filed: 1970-01-09
Abstract: 1340853 Magnetic switches HOOVER Ltd 7 Jan 1971 [9 Jan 1970 27 July 1970 30 Oct 1970] 1254/70 36345/70 and 51833/70 Heading H1N An immersion heating unit for an automatic beverage maker or electric kettle includes a Curie effect switch interrupting the supply to the heater when the appliance boils water or boils dry, a manual reset being provided for reclosing the switch contacts. At the Curie temperature, a pivoted magnet 35, Fig. 2, drops from its position engaging the section 37 of a nickel-iron alloy ferromagnetic element 38 and attracts an armature 48 to separate the contacts 25. Such movement of the magnet 35 also moves rod 50 and, via lever 52, releases a plate 18 to disperse tea into the boiling water in the receptacle 10, steam from which is conveyed via a tube 44 to the element 38 to heat it. For resetting, the lid 15 is removed and rod 50 depressed. In a kettle, the rod acting on the magnet 35 can be merely for resetting, Figs. 3, 4 (not shown). The control mechanism may utilize a magnet 99, Fig. 5, moving rectilinearly from part 100 of a ferromagnetic element 101 to open contacts 84, 85, by engaging a pin 91 through a diaphragm 90. An S-shaped lifter member 115 restores the magnet 99 when required. A neon lamp 138 indicates when the contacts 84, 85, are closed. If it is desired to bring water back to the boil before the main ferromagnetic element 160, Fig. 9, has cooled sufficiently, a second ferromagnetic element 183 may be employed which attracts the magnet 156 sufficiently to allow the switch contacts 162, 163 to close, even though element 160 is not cool enough to attract the magnet 156. Element 183 is mounted on the reset lever 180 which has a cam 186 co-operating with a projection 188 on the magnet 156. Two levers 180 with elements 183 may be provided. Another way of providing two or more ferromagnetic elements 250, 251, Fig. 13, either or any of which may co-operate with the magnet 242 and be in heat conductive contact with the heater 265, is to mount the elements 250, 251, on a manually rotatable sleeve 247 indexable in the required positions. A lifter member 270 is provided for resetting. Ferrites 250, 251, may have different Curie points and the appliance may be a deep fat fryer.
Patent GB-1345702-A (GB)
Title: Water supply apparatus for caravans or the like mobile or  temporary habitation
IPC: F04F1/06
Filed: 1970-02-21
Abstract: 1345702 Raising liquids by gaseous pressure T A BURTON 19 April 1971 [21 Feb 1970] 8430/70 Heading F1R In a water supply system e.g. in a boat or caravan, in which water is discharged through a delivery tube 4 from a storage tank 1 which is pressurized from remote means through an air tube 3, the tank having an airtight or substantially airtight access opening cap 2, a hollow tube connection 20 is secured to the cap by a screw 22 through which the water pipe passes with clearance, and the air pipe 3 communicates with the hollow interior which is connected to the interior of the tank by the clearance between the pipe 4 and screw 22. Air may be supplied by a pump or an air bottle.