baber/WOPTO huggingface dataset:
Patent GB-1450449-A (GB)
Title: Multiple melt chamber extrusion die
IPC: B29C48/08
Filed: 1973-12-10
Abstract: 1450449 Multiple layer sheet extrusion die BELOIT CORP 10 Dec 1973 [20 Dec 1972] 57176/73 Heading B5A In the extrusion of a plastics film comprising a number of layers, each layer or a plurality thereof is supplied to a die outlet passageway, or passageways, in the required juxtaposition, from one of at least two sequentially connected chambers 19, 21 and 20, 22, Fig. 1, provided on each side of a central die divider 12, the upstream chambers 19, 20, each having an outlet to the chambers 21, 22, which is adjustable upon sliding displacement of members 47 along the divider 12, and the die outlet passageway, or passageways also being adjustable by adjustable die lips. In the Fig. 1 embodiment a pair of chambers 19, 21 and 20, 22 is provided on each side of the divider plate 12, and each pair of chambers discharges to one of separate extrusion outlet passageways 24. The die comprises die halves 11 clamped to the plate 12 by bolts 13. The members 47, are slidingly adjustable by push and pull screws 50, 51. The outlet passages 24 are each provided with a pair of adjustable internal deckles 22, 28 and with an external adjustable deckle 45, as in Specification 1,444,988, the deckles 45 being adjustable by rack and pinion or worm gear means. The outlet passages 24 are each defined by a transversely adjustable die lip, either or both of which may comprise an adjustably slidable lip 25, or an adjustably flexible lip 26, as in Specification 1,444,988. The lip 25 is clamped by bolts 35 to a die surface 30 along which it is adjustably slidable by differential adjustment screws 33. The lip 26 is provided with a slot 42 about which the flexing adjustment is effected by differential screws 40, the lip also being slidingly displaceable along surface 30 by push and pull screws 39. Resistor heaters 16 are provided along each die half 11, and are controlled from thermocouples 17. The die chambers 19, 20, 21, 22 may be end fed, or maybe centre or side fed. Each chamber may be fed with one, two, or three layers of material delivered through replaceably mounted end plugs 62, Fig. 2, each comprising a "V" shaped vane to the interior of which one material may be delivered from an inlet 64a, and to each exterior side of which another material or materials may be delivered from an inlet 64. In the similar Fig. 3 embodiment (not shown), each chamber pair extends into closer proximity to the die exterior on which separate heater banks are provided for heating each chamber separately, and a heater rod may also by mounted in the die for additional control of the upper chamber. In the Fig. 4 embodiment, all chambers 19-22 may discharge into a single outlet 73 and the chambers may be end fed, or centre fed as shown from centre inlets 72, 72a. The Fig. 4 embodiment may alternatively comprise a pair of outlets spaced within 0.002 ins. apart to ensure immediate lamination of the extruded films. In the Fig. 5 embodiment, not shown, the divider 12 is replaced by a divider having a tapered downstream end.
Patent GB-1181399-A (GB)
Title: Improvements in Recombination Systems for Sealed Batteries and Batteries Incorporating Them
IPC: H01M10/52
Filed: 1967-12-19
Abstract: 1,181,399. Gas recombination device. OLDHAM & SON Ltd. 19 Dec., 1967 [30 Dec., 1966], No. 57671/67. Heading H1B. A sealed accumulator comprises (a) a container and lid, (b) positive and negative plates and a separator within the container, (c) electrolyte covering the plates but not filling the accumulator so that a headspace remains in which hydrogen and oxygen evolved in charging the accumulator are confined, and (d) means, 54, Fig. 2, for effecting recombination of the hydrogen and oxygen, which means are housed in a vertical flue, 50, in or above the headspace so that the gases pass up the flue by convection, thereby coming into contact with the recombination-effecting means and uncombined gases leaving the flue at the top re-enter at the bottom and are recycled. In Fig. 2, the flue is in communication with the cell through chamber 37 attached to the underside of the accumulator cover. Access to the chamber is controlled by valve 68 which is automatically opened when the battery is inserted into a charging rack and cup 73 attached to the rack contacts plunger 66. The battery may also include flash-suppressing means for ensuring that on opening the valve the gases do not contact the recombinationeffecting means too quickly. In Fig. 2, 49 indicates a gas-permeable liquid-impermeable membrane which fulfils this function by equalizing the pressures on either side of the valve. The membrane may be a fluorocarbon polymer of maximum pore size 1.5 Ám and average pore size 0.45 Ám. In other embodiments (Figs. 6-9, not shown), the flash suppressing means may comprise particles surrounding the recombination-effecting means to a depth of at least “-inch, the particles being just small enough to pass through a 12-mesh screen (U.S.) They may be spherical or rod-shaped and made from glass, alumina or lead. The recombination effecting means may be a heated platinum wire (Fig. 4) or a catalyst. In Fig. 2 it is a carbon heating element, 55, on which palladinized alumina pellets, 57, are stuck with epoxy-resin. The accumulator may be a two-cell lead acid battery and the electrolyte may be gelled. In other embodiments a single device serves two cells, the intercell partition not extending to the top of the battery and a safety valve is fitted (Fig. 1); the flue is protected from splashing by electrolyte by baffle-plates (Fig. 4); the chamber is screwed on to a collar projecting upward from the cover (Fig. 7) and two cells completely separated by the intercell partition are served by a single device of modified design.
Patent GB-1217517-A (GB)
Title: Method of bottom casting capped steel ingots
IPC: B22D27/15
Filed: 1967-12-27
Abstract: 1,217,517. Casting ingots; casting processes. NIPPON KOKAN K.K. 27 Dec., 1967, [26 Dec., 1966], No. 58598/67. Heading B3F. [Also in Division C7] To produce a capped steel for making steel sheets for press-forming, steel is bottom poured into an ingot mould 4 in which the air pressure is reduced and maintained within the range 310-610 mm. Hg for a major part of the casting period before the mould is sealed (by raising a plug 7 to close an exhaust outlet from a mould cap 5) and the casting completed until the molten steel hits the closed top of the mould to disperse the remaining atmosphere into the molten steel and stop the rimming action. This results in an O 2  contact of 0À02-0À03% and ultra-fine inelusions are thus reduced to improve mechanical properties. Upon or before closure of the mould outlet by the plug 7, to fix the N 2  in the steel, V, B, Zr, Ti or Al is added, e.g. from a downsprue 2, Fig. 2b, central to a ring of moulds 4. Inert gas from an inlet 24, Fig. 2d, accelerates a convection motion created by a slant-ended runner 3. The rimming action is observed through a window 8 and control exercised by introducing air at 21 into the exhaust system as claimed in Specification 1,217,518.
Patent GB-588685-A (GB)
Abstract: 588,685. Rectifying alternating currents. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. March 3, 1945, No. 5339. Convention date, March 25, 1944. [Class 38 (ii)] [Also in Group XXXVII] The operation of a dryplate rectifier is controlled by a thermal switch so located that it attains substantially the temperature of one of the rectifier plates. In a system for charging a battery 35, or supplying D.C. to another load 40 from A.C. mains 20, 21, an arrangement 30 of dry-plate rectifiers is protected by a thermal switch 46, which upon overheating, opens switch 43 to insert a choke 28 in the circuit or opens mains switch 25 in the supply to the transformer 26, which has a tapping switch 31 in the secondary. The thermal switch, as shown in Fig. 4, comprises a bowed bimetallic element 46, mounted between supports on a bracket 75, carried by an extension 60a of a centrally placed plate 60 of a number of rectifier elements mounted side-byside, so that when the temperature of the plate exceeds a given temperature the bimetallic element 46 snaps into the dotted position and by movement of rod 45 opens a switch 43, also mounted on, but insulated from the bracket 75. So that the thermal element may be affected by the plate temperature, but screened from the ambient temperature it is enclosed in a cap 80 surrounded by heat insulating material 81 contained in an outer casing 70. The battery charging arrangement of rectifiers 30, choke 28, transformer 26, switch 25, ammeter 37, fuses 22, 23, 34, 38 tap changing switch 31 and choke 36, together with the thermally-operated switch, may be arranged as a unit in a case, Fig. 1 (not shown).
Patent GB-1413127-A (GB)
Title: Gas cleaning apparatus
IPC: B08B15/00
Filed: 1972-12-28
Abstract: 1413127 Electrostatic separation W C HOLMES & CO LTD 21 Dec 1973 [28 Dec 1972] 59799/72 Heading B2J [Also in Division F4] Dust-contaminated atmosphere of an industrial building (11, Fig 1) is cleaned as it passes upwardly through one or more similar chambers 17 in the building roof F, by an electrostatic precipitator 18 in said chamber. In Fig 2 the precipitator is shown as comprising electrode plates 22 and wires 24. A negative high voltage direct current is applied to wires 24 to charge the dust particles which thereby deposit on to the earthed electrode plates 22. Fig 4 shows another precipitator arrangement comprising earthed corrugated plates 66 together forming hexagonal passages 67 each containing an electrode 68. In the arrangement shown the building atmosphere discharges from the chamber 17 via openings 40 and the precipitator 18. When the latter becomes fouled with dust, or at preset time intervals the openings 40 are closed by flaps 20, 31 and the chamber is placed in communication with a duct 36 by the opening of a valve 39. A high velocity gas flow is then applied to the precipitator plates to remove dust from them to a scavenging device (37, Fig 1) at the outlet end of duct 36. Dust removal may be assisted by vibrating the preoipitator plates. The high velocity gas flow may be an induced flow from above the plates (i.e. via duct 36), or it may be a forced flow applied from below the plates (Fig 3).
Patent GB-1369618-A (GB)
Title: Document handling apparatus
IPC: G03G15/00
Filed: 1971-12-23
Abstract: 1369618 Feeding and delivering sheets XEROX CORP 23 Dec 1971 [28 Dec 1970] 59877/71 Heading B8R A document handling apparatus comprises a tray 27 from which documents are fed one by one from a pile 24 by transport means to a work station, the feed being controlled by control means employing light responsive document detectors to provide signals for controlling feed, the means having a light source and a plurality of light conducting fibres for leading light from the source to an operative position opposite each detector. The machine may be a copier, documents in pile 24 being separated by a roller 14, or belt not shown, and fed via double feed preventing, counter rotating rollers 35, 36, rollers 42, 43, guides 28, 40 and a belt 45 to a fixed register stop 7 at the copying position. Thereafter the documents are delivered via belt 45, guides 25, 50 and rollers 52, 53 back to a stack in the tray 27 where they are separated from the pile 24 by a pivotable retainer 26. Light pipes 79 from a single light source lead to photo-cells 73, 71, 69, 70. A separated document detected at 69 stops drive to the separating and feeding rollers and starts drive to belt 45 for a period gauged by the detector 73 which counts light flashes through an apertured disc rotated by the machine motor 58. During this time a further document is separated and held ready at rollers 42, 43. After copying, belt 45 is driven in reverse and a document trailing edge sensed at 70 switches belt 45 again to the forward drive mode and starts rotation of rollers 42, 43 to feed the next document to copying position. When the. pile 24 is empty as sensed by detector 71, the retainer is pivoted to allow the stack to fall into the pile position.
Patent GB-1427820-A (GB)
Title: Chromium steel of mixed structure containing ferrite for high temrperature use
IPC: C22C38/22
Filed: 1973-12-31
Abstract: 1427820 Chromium-steel compositions MITSUBISHI JUKOGYO KK and SUMITOMO METAL INDUSTRIES Ltd 31 Dec 1973 [28 Feb 1973] 60285/73 Heading C7A A steel which is especially suited for use in heat exchangers consists, by weight of:- optionally up to 0.1% aluminium and optionally up to 0.1% titanium together with 0.001 to 0.1% boron the balance being iron and impurities including preferably not more than 0.035% each of phosphorus and sulphur. These steels have a mixed structure including a ferrite phase, generally together with a bainite phase. The steels possess improved high temperature strength especially in the region 600 to 650‹C, without any deterioration in weldability and toughness.
Patent GB-604137-A (GB)
Abstract: 604,137. Buoyant electric cables. OKONITECALLENDER CABLE CO., Inc. Dec. 23, 1943, No. 5189/45. Convention date, Feb. 6. 1943. Divided out of 588,819. [Class 36] The sealed cells 2 forming the core of a buoyant electric cable are made of plywood and are separated by resilient spacers 3. The cells may have a waterproof covering film 8 of metal, metal foil, metallised paper, or a thermosetting synthetic resin, and a similar film may be provided between adjacent wood plies. The spacers may be of inflated or cellular rubber with a skin 9. The cells may be further strengthened by an internal pressure up to 100 lbs. per sq. inch. The cores and spacers are enclosed by a rubber sheath 4 and the cable completed by a stranded conductor 1 and external rubber sheath 5. Specification 587,451 is referred to.
Patent GB-1335854-A (GB)
Title: Cold-gas refrigerator
IPC: F25B9/14
Filed: 1970-12-29
Abstract: 1335854 Cold-gas refrigerators PHILIPS GLOEILAMPENFABRIEKEN NV 29 Dec 1970 [29 Dec 1969] 61539/70 Heading F4H A cold-gas refrigerator comprises an expansion space 30, a compression space 25 and a displacer 26, such that an annular gap 29 is formed around the displacer 26. One of the surfaces forming the gap is coated with a material of relatively high heat capacity. The dimensions of the gap 29 must be chosen so that the heat transfer number ##200 and the pressure differential across the gap as a result of flow loss #p#0À1p, where p is the average pressure. The hydraulic diameter d n  of the annular gap 29 satisfies the formulµ where n=viscosity of the working medium, p = specific density of the working medium, M = molecular weight of the working medium, R = gas constant, T = average temperature in the gap, l=length of the gap in the axial direction, n=number of cycles/second of the refrigerator, D = diameter of the displacer.
Patent GB-2030964-A (GB)
Title: Dispensing devices for cardboard cartons and other containers
IPC: B65D5/74
Filed: 1978-08-30
Abstract: One wall (4A) of a cardboard container is of double thickness. The outer wall has a tab (T) which can be pulled open and pushed closed. The inner wall defines a stop (7) which locates the tab T in its closed position when it it desired to re-close the container and preferably a flap (2B) which is attached to the tab (T) and bends into the channel shape illustrated as it is pulled through the opening formed by the removal of the tab (T). This channel assists in dispensing the contents from the container. <IMAGE>
Patent GB-2013842-A (GB)
Title: Fragmentation warhead
IPC: C21D1/09
Filed: 1978-08-31
Abstract: The invention provides, for a fragmentation warhead, a steel casing having lines of weakness therein formed by narrow zones of martensite along which the casing fragments on detonation. The invention further provides a method of producing such a steel casing wherein the martensite zones are formed by the action of a localised heat source e.g. a laser or electron beam directed on to the envelope surface of the casing. The invention enables the casing to be formed from a greater variety of steels than was previously possible.
Patent GB-2008135-A (GB)
Title: Lactide-glycolide block copolymers
IPC: A61B17/00
Filed: 1978-11-15
Abstract: High molecular weight block copolymers of L(-)-lactide and glycolide are prepared by reacting a high glycolide- low L(-)-lactide copolymer with a high L(-)-lactide-low glycolide copolymer in the presence of an ester interlinking agent. The block copolymer so obtained may be extruded to form filaments useful in the preparation of absorbable sutures.
Patent GB-2038027-A (GB)
Title: Image reduction or enlargement system for radiation such as X-rays and neutron beams
IPC: G21K1/06
Filed: 1978-11-17
Abstract: A Bragg reflector is adapted for reducing or enlarging a pattern. The reflector comprises a crystal 13, e.g. a silicon crystal, having a surface 14 formed partly by the crystal material itself and partly by co-planar areas of a mask 17 of radiation-opaque material embedded in recesses 20 of the crystal material. A beam X1 of X- radiation incident on the crystal surface 14 is Bragg-reflected by lattice planes 21 of the crystal except where absorbed by the opaque material. The reflected beam X2 therefore contains an image of the pattern defined by the unmasked areas of the crystal surface. The crystal surface is at an angle  theta  to the lattice planes so that incidence and reflection are asymmetric in respect to that surface and effect a reduction or enlargement according to whether the incident beam has the larger or the smaller of the angles formed between the surface and the incident and reflected beams. The co-planar arrangement of the Bragg-reflecting and opaque materials ensures that the opaque material does not obstruct the reflected rays. The reduction or enlargement is one-dimensional and a second reflector is provided for reducing or enlarging the pattern in the second dimension <IMAGE>
Patent GB-2034642-A (GB)
Title: Improvements relating to vehicle cabs
IPC: B62D33/06
Filed: 1978-11-22
Abstract: Secured to the body of a vehicle cab generally parallel to one side of the windscreen is a rail 9 which provides a firm handhold which a person standing on a lower part of the cab can hold with one hand whilst cleaning the windscreen with the other hand. The rail is spaced from the surface of the body to enable it to be gripped readily by a gloved hand, and its cross-section for at least part of its length is shaped so as to reduce the level of noise which the rail causes when the vehicle to which the cab is fitted is in motion. An extension 19 may be provided at the top of the rail which extends above a door of the cab and provides a further handhold. In addition there may be one or more transverse rails 20 extending between the extension 19 and the extension of a similar rail at the opposite side of the windscreen. The extensions and transverse rail or rails may form at least part of a luggage rack over the roof of the cab. <IMAGE>
Patent GB-2035338-A (GB)
Title: Transition metal catalyst composition for use in olefine polymerisation
IPC: C08F4/64
Filed: 1978-12-04
Abstract: A compound of a transition metal of Group IVA or VA of the Periodic Table, which compound contains at least one  eta <6>-arene, is contacted with a magnesium salt of a mono- or di- carboxylic acid and optionally with a Lewis base and/or halogen compound. The transition metal compound can be a compound such as a titanium dichloride- aluminium chloride-arene complex compound. The magnesium salt may be magnesium acetate, magnesium trifluoroacetate, magnesium benzoate or magnesium oxalate. The product is used for the polymerisation of olefines, preferably in the presence of an organo- metallic compound such as an organo- aluminium compound.
Patent GB-2011312-A (GB)
Title: Shaping Thickenings on Thermoplastic Projections
IPC: B29C65/60
Filed: 1978-12-15
Abstract: An apparatus is provided for the thermal shaping of a thickening on a projection (17) composed of a thermoplastic material. One end of the projection is heated and is shaped to a head by a heater die (3) formed of an elastically flexible material. The die is preferably formed of a heat-resistant polymer such as a silicone rubber. <IMAGE>
Patent GB-2013584-A (GB)
Title: Trailer/dinghy convertible
IPC: B63B7/04
Filed: 1979-01-29
Abstract: A trailer convertible to a dinghy, comprising two trailer parts 11, 12, one adapted to be inverted over the other to form a trailer storage volume which is closed at the front, sides and top but is open at the back, a removable rear closure wall 14 for completing the trailer volume, and a chassis on which the trailer storage volume is detachably mounted, the two trailer parts also being adapted for jointing in an in-line relationship which produces a water-worthy dinghy. <IMAGE>
Patent GB-2030032-A (GB)
Title: Fishing line connecting device
IPC: A01K91/047
Filed: 1979-01-31
Abstract: A device for connecting a fishing line to an item of fishing tackle e.g. a hook, a weight or lure or another fishing line without knotting the line comprises a main shank 1 having a protrusion 2 formed by bending an intermediate portion of the shank 1. A loop 3 is provided at one end of the shank 1 and a ring at the other end. A large number of alternative constructions are disclosed. <IMAGE>
Patent GB-2014707-A (GB)
Title: Cartridge Cases
IPC: F42B5/26
Filed: 1979-03-02
Abstract: This invention relates to tubular articles that are especially suitable for use as shotgun cartridge cases. The tubular article comprises a plurality of layers, each layer being formed by a helical winding of strip material, for example comprising paper, and having an elongation at break in the circumferential direction of at least 6%, preferably at least 8%. Abutting edges of the helical windings in each layer are axially displaced from the abutting edges in the adjacent layers. The layers are bonded together by a flexible adhesive such as polyvinyl acetal or a hot melt adhesive.
Patent GB-2018647-A (GB)
Title: Improvements in or relating to bending machines
IPC: B21D5/02
Filed: 1979-04-17
Abstract: In a bending machine comprising a punch-tool attachment 15 on which a punch-tool 13 is fixedly mounted, an anvil 2 which co-acts with the punch-tool 13 to bend a workpiece and means 21-23 for moving the punch-tool in a substantially vertical direction towards and away from the anvil, the punch-tool attachment means 15 is pivotally mounted about an axis 24 which is substantially perpendicular to the vertical movement path of the punch-tool and to the direction 25 of work removal and is offset from a vertical plane passing through the punch-tool 13 in its vertical working position which is defined by abutting surfaces, the punch-tool attachment 15 and the punch 13 being so constructed that they are held in the downwardly swung vertical working position gravitationally. Clearance between tool and anvil can thus be made small. <IMAGE>
Patent GB-2049116-A (GB)
Title: Control actuator
IPC: H01H13/16
Filed: 1979-05-19
Abstract: An actuator comprises a casing (11), which houses the switch (eg: a bistable switch) and a pedal (30) biased to a given position and depressable to actuate the switch. The pedal has resilient tongues (33, 34), which engage in slots (23, 24) in the casing to mount the pedal on the casing. The resilience of the tongues permits pivotal actuating movement of the pedal. <IMAGE>
Patent GB-2050467-A (GB)
Title: Fracturing Subterranean Formations
IPC: E21B43/267
Filed: 1979-06-07
Abstract: A method is provided for hydraulically fracturing a subterranean formation in which a fracture is first induced in the formation and then subjected to multiple hydraulic fracturing cycles to generate vertical linear fractures or to extend the fracture zone radially outwards from the point of introduction of the fracturing fluid into a well penetrating the formation. By utilizing a plurality of carrier stages of fracturing fluid containing a high ratio of fine proppant and injected at a low rate (compared to conventional techniques) and alternating with the carrier stages a plurality of spacer stages of fracturing fluid without proppant, linear fracturing solely within the formation can be substantially increased with very little or no radial vertical fracturing occurring outside the formation.