baber/WOPTO huggingface dataset:
Patent GB-865325-A (GB)
Title: Improvements relating to the preparation of calcium carbide in a shaft furnace
IPC: C01B32/942
Filed: 1958-11-25
Abstract: <PICT:0865325/III/1> In a process for the production of calcium carbide in a shaft furnace from a solid carbon fuel and lime or limestone by means of an oxygen-rich blast (as defined) a part or all of the blast is introduced so as to pass into and through the pool of molten calcium carbide which collects in the bottom of the furnace p hearth.  The oxygen rich blast may be any blast of say oxygen enriched air, oxygen/steam mixture or oxygen alone but contains at least 50% by volume free oxygen.  A mixture of lime or limestone and coke in proportion of say 1:2 by wt. and of particle size ranging from 5-100 preferably from 10 to 30 mm. and especially 20-25 mm. is fed through bunker 3 of test furnace 1, oxygen being admitted through tuyeres 2.  Co-containing gases evolved during combustion are removed from the furnace at 4 and the pool of molten carbide which collects in the bottom of the hearth is drained either continuously or periodically through discharge port 5 and channel 6, the rate of drainage being controlled so that the level of the molten pool in the furnace remains above the inlet openings of the tuyeres so that oxygen introduced during the reaction passes into and through the molten carbide. Modifications of the furnace whereby a second discharge port is positioned in the furnace wall above the inlets of the tuyeres for removal of the molten carbide the lower port 5 being thereafter used for the periodic removal of heavy molten slag, e.g. ferrosilicon formed from the impurities in the melt, and the use of tuyeres positioned at different levels in the furnace wall such that one or more inlets are below and one or more inlets are above the surface of the pool of molten carbide at the bottom of the hearth, are referred to.
Patent GB-930304-A (GB)
Title: Tetranitrodibenzotetraazapentalenes and explosive compositions containing such compounds
IPC: C07D249/16
Filed: 1961-10-24
Abstract: The invention comprises tetranitro derivatives of dibenzo-1,3a,4,6a-tetraazapentalene having the formula: <FORM:0930304/IV(a)/1> and the preparation of such compounds by the direct nitration with nitric acid of dibenzo-1,3a,4,6a-tetraazapentalene, the concentration of the nitric acid with respect to the water present being chosen sufficiently high so that at any chosen reaction temperature substantially none of the corresponding dinitro compound is formed.  The compounds are used as explosives. Specification 656,587 is referred to.
Patent GB-1087830-A (GB)
Title: Stapling machine
Inventor: HEIL EDWARD KAREL
IPC: A41H37/02
Filed: 1966-08-25
Abstract: 1,087,830. Attaching pronged fasteners. NORTH & JUDD MANUFACTURING CO. Aug. 25, 1966, No. 38087/66. Heading B4C. A machine for attaching pronged fasteners 10, together with a backing plate 12 and a reinforcing tape 302, to a fabric comprises a feed mechanism 300 for the tape having a rocker 330 mounted on a slide 318 reciprocable adjacent a tape guideway 316, the slide being actuated by a compressed air cylinder 400 so that in one position, drive pins 340 on the rocker are in feeding engagement with the tape and in another position of the rocker the drive pins are withdrawn from the tape. The slide is reciprocated in a slot 328 by means of an arm 325 connected to the ram 404 of the air cylinder. The ram is also adapted to actuate, via bars 416, 412, slides 104, 176. The slide 104 is provided with a spring-loaded pawl 116 which is arranged to move a pronged fastener 10 from the lower end of a shoot 47 on to the bottom of a ram 30 where it is held by magnets; the movement of the fasteners 10 down the shoot is controlled by an escapement device 46 actuated by the ram 30. The slide 176 is provided with a blade for removing the backing plates one at a time from the lower end of a magazine 170 and feeding them into a support block 156. Both slides are fitted with handles 140, 220 so that they may be manually actuated in the event of a fastener becoming jammed. The support block 156 is secured to a table 150 and is provided with pivoted levers (13, Fig. 5) which are arranged to coact with a fixed thrust plate (162) in order to clench over the legs of the pronged fastener. The slides 104, 176 are adapted to actuate switches 430 at the completion of their strokes thereby completing a control circuit for the actuation of a compressed-air cylinder 26 for driving the ram 30. The mechanism for actuating the main control switch is foot-operated and is also arranged to operate a safety guard.
Patent GB-1194035-A (GB)
Title: Improvements relating to Furnaces
Inventor: ROWAN HAROLD CHARLES
IPC: F27B9/22
Filed: 1967-08-22
Abstract: 1,194,035. Rollerway conveyers for furnaces. GIBBONS BROS. Ltd. 16 Aug., 1968 [22 Aug., 1967], No. 38609/67. Heading F4B. A continuous furnace for the firing of ceramics or heat treatment of metals comprises a rollerway conveyer with hollow ceramic or alloy rollers 101 with ends disposed in openings 105 in the side walls 102 and stub shafts 106 passing through bearings 107, each stub shaft carrying a counterweight 108 providing compensating bending moment for the blocks 109 carried by the rollers. Alternate rollers have longer and shorter stub shaft's with the weights adjusted to provide even moments. Gas burners 103, 104 are disposed in the side walls near the roof and floor respectively. Alternatively, the compensating bending moment can be applied through springs or fluid pressure motors applied between supplementary shaft bearings and a fixed part of the kiln. In the latter case the pressure may be applied in groups and in response to load detecting means. The stub shafts may be disposed in the ends of the rollers as disclosed in Specification 1,107,481.
Patent GB-1431400-A (GB)
Title: Process for the manufacture of dimensionally stable high-tenecity
IPC: D04H3/153
Filed: 1973-08-16
Abstract: 1431400 Non-woven fabrics; web formation LUTRAVIL SPINNVLIES GmbH & CO 16 Aug 1973 [17 Aug 1972] 38660/73 Headings D1N and D1R A non-woven fabric is produced by spinning a polyester through one or more rows of holes to form matrix filaments and simultaneously spinning through one or more rows of holes a polymer of m.p. above 160‹C but at least 30‹C below that of the polyester to form binder filaments, the throughput rate being 3.5 to 10 g/min per hole, the rows of filaments being cooled, mixed and drawn, at 2,000 to 15,000 m/min by gas flowing through a duct of slat-like cross section, the drawn filaments being separated to form two mixed bundles and laid to form a random web which is then thermally bonded. The fabric is of high tenacity (its grab tensile strength in bonds divided by the weight in g/m<2>) is 200 to 432 and dimensionally stable (the transverse and longitudinal dimensions change by 0 to 7% under the action of moisture and/or heating to 160‹C). Preferably the matrix and binder filaments are extruded in alternate parallel rows, the ratio of the number of binder to matrix filaments being from 1:1 to 1:5 and the ratio by weight being from 10:90 to 30:70. The matrix filaments are polyethylene terephthalate, the binder filaments may be polycaprolactam, a copolymer of caprolactam and up to 20 mole% hexamethylene adipamide, a copolymer of ethylene terephthalate with 8 to 25 mole% ethylene isophthalate, a copolymer of ethylene terephthalate with 5 to 40 mole% ethylene adipate, isotactic polypropylene or polyurethane formed from polyethylene adipate and diphenylmethane-4, 4' diisocyanate (100 parts) and butane 1-4 diol (30 parts). The filaments may be cooled after extrusion by a flow of gas transverse to their direction of motion or by a water cooled duct. They are air laid upon a moving endless metal belt or rotating perforated drum using a reciprocating motion and suction applied from below the support. A dye, lubricant, antistatic agent and/or a wetting agent, and methylphenyl siloxane in water may be applied to the fabric before it is autogeneously bonded. Preferably the fabric is pre bonded by calendering at 70 to 110‹C and then bonded at 180 to 225‹C on a perforated rotating drum whilst pressed against the drum by a gauze belt moving with the drum. The bonding thus occurs whilst the fabric is fixed in area. The fabric may be needled.
Patent GB-1368828-A (GB)
Title: Mixing plant for preparing materials comprising coated elements
IPC: B28C5/36
Filed: 1971-08-18
Abstract: 1368828 Endless belt mixer P FOUCAULT 18 Aug 1971 38770/71 Heading B1C In a mixer for coating granular materials with a liquid, plastics or powdered binder the upper rim 12 of an endless belt is formed into a trough as by inclined rollers 17, and is supplied with granular material by means 13, with binder at 15, and has detachable mechanical stirrers 20. These are in groups which rotate about axes longitudinal and transverse of the belt, and are mounted on a carriage 25 which is vibrated (or reciprocated) longitudinally of the belt as by a crank mechanism 28, 29. The mixture then passes under a distributor-leveller device 31 consisting of a flat disc rotatable about an axis perpendicular to the belt, and is discharged into a receiver 32. There may be additional binder supply means 30. The belt is cleaned by a water-jet 33 and scraper 34 which is associated with a tension adjustment means 35. The apparatus may be used for making concrete, coated material for roads, or chemical products.
Patent GB-1037448-A (GB)
Title: Improvements in or relating to container end components provided with pull tabs
IPC: B65D17/34
Filed: 1964-09-23
Abstract: 1,037,448. Opening containers. CONTINENTAL CAN CO. Inc. Sept. 23, 1964 [April 10, 1964], No. 38817/64. Heading B8D. A pull tab 18, Fig. 3 (not shown), preferably of sheet metal, is joined to a tear strip in a can end by means of a rivet 17 integral with the can end, the tab being provided with transverse ribs 28 each aligned with a groove 29 in the opposite surface of the tab, which enable it to be gripped. The edges of the tab at the sides and outer end are turned in under it at 22. The tear strip, Fig. 1 (not shown), is formed by weakening lines to make an elongated pouring opening.
Patent GB-1509412-A (GB)
Title: Space heating assembly
IPC: F24B1/18
Filed: 1975-04-21
Abstract: 1509412 Space heating apparatus J HENRIQUES 21 April 1975 [9 Dec 1974] 39112/77 Divided out of 1509411 Headings F4W and F4S A space heating assembly comprises a closed solid-fuel stove 20 removably positioned within a thermally insulated free-standing fireplace enclosure 66 and spaced from the bottom, rear and upper walls thereof to define a convection space, a flue enclosure 79 mounted over a flue aperture in the upper wall of the enclosure 66 and a flue adapter conduit movably associated with and connecting the flue aperture and a combustion products exit aperture in the top of the stove 20. A duct 81 connects the enclosure 79 to an existing chimney, so that one or more such assemblies may be located at any position in a room. The enclosure 66 is double-walled and a thermally insulating material 90 such as asbestos vermiculite fills at least part of the space between the double walls. In the form shown, a decorative casing surrounds the enclosure 79 and duct 81 to define an air space 85. Heated air is drawn from the space 85 either through the inner duct 97 of a double duct chimney or through openings (87, Fig. 3) in the duct 81. A smoke deflector 80 enhances up-draught in the duct 81. A rear opening 98 in enclosure 66 enables air to flow from the convection space into a room adjacent the room in which the assembly is located. The stove 20 is described in parent Specification.
Patent GB-1166200-A (GB)
Title: Improvements in ventilators and windows for vehicles.
Inventor: PERKS JOSEPH
IPC: B61D27/00
Filed: 1967-08-25
Abstract: 1,166,200. Vehicle roofs. WEATHER] SHIELDS Ltd. 12 Aug., 1968 [25 Aug., 1967-, No. 39127/67. Heading B7B. A roof ventilator or window panel 10 is mounted at each end on pairs of telescopic struts 20 each having a compression spring 33 acting on a transverse pin 31 accommodated in aligned slots in the parts 21 and 23 of each strut. The protruding ends of the pin 31 engage notches 36 in fixed plates 29 to hold the struts in a number of positions corresponding to various desired positions of one or both ends of the ventilator.
Patent GB-1208722-A (GB)
Title: Improvements in or relating to gas treatment
Inventor: EDMONDS WILLIAM JOHN
IPC: B01J19/22
Filed: 1966-09-02
Abstract: 1,208,722. Gas treatment of articles. W. J. EDMONDS. 8 Nov., 1967 [2 Sept., 1966], No. 39269/66. Heading B1F. In apparatus for hardening refractory coatings of wax shell ceramic molds with ammonia in the process of investment casting, the molds 23 are attached to carrier rails 18 and pass through treatment zone 12 into which ammonia is fed and a displaced gas receiving zone which lies between the lower edge 16 and the upper edge of access window 22. Air is directed from nozzles 24 onto the molds 23 at the lower extremity to remove residual ammonia. Excess gas is removed via ducts 13, 26 and 27. An angularly movable plate regulator is situated at the junction of the ducts 13 and 26 whereby the flow in each duct can be balanced. The feed of ammonia into zone 12 may be controlled by vertically staggered gas detection devices placed just above the lower edge 16 of partition 11. Receptacles 30 and 31 may contain a suitable dipcoat and a fluidised bed of suitable stucco refractory material respectively.
Patent GB-1202204-A (GB)
Title: Improvements in or relating to solid state circuit breakers
Inventor: PRITCHARD GEORGE WELLESLEY
IPC: G05F1/45
Filed: 1966-09-02
Abstract: 1,202,204. Protective arrangements. BOOTH ENG. Ltd. 31 Aug., 1967 [2 Sept., 1966], No. 39295/66. Heading H2K. An overload protective arrangement has two silicon controlled rectifiers TH1, TH2, and a current sensing device RC connected in series with a load RL. A control circuit for the rectifier TH1 includes switches SW1 and SW2 to trigger the rectifier to its conducting and non- conducting states and means responsive to an output from the device RC to trigger the rectifier TH1 to its non-conducting state in the event of excess current. In the arrangement shown, operation of the switch SW2 or the voltage across a series resistor RC causes a trigger A to trigger a controlled rectifier TH3 to conduction so that a capacitor C1 discharges through the rectifier TH3 to apply a reverse potential across the rectifier TH1 to stop it conducting. The capacitor then charges with the opposite polarity and switches off the rectifier TH3 when the rectifier TH1 is again rendered conducting. The rectifier TH2 is rendered conducting when the potential at a junction between resistors R4, R5 is sufficiently negative, i.e. when the resistance of the load RL is sufficiently high. This potential causes a trigger circuit B to apply a positive pulse to rectifier TH2 to cause it to conduct and so complete the load circuit. Should the load be short-circuited, the rectifier TH2 remains non- conducting. Fig. 2 (not shown), illustrates the full circuit arrangement, the tirgger circuits including transistor oscillators. In protecting an A.C. circuit, the controlled rectifiers TH1. TH2 are connected across a rectifier bridge in series with the load, Fig. 3 (not shown).
Patent GB-1526809-A (GB)
Title: Process for producing graphite bodies
IPC: C04B35/532
Filed: 1975-09-26
Abstract: 1526809 Graphite body UNION CARBIDE CORP 26 Sept 1975 [27 Sept 1974] 39441/75 Heading C1A [Also in Division B5] A graphite body having a longitudinal coefficient of thermal expansion of less than 0À1x 10<SP>-6</SP>/C. is made by extruding, in an 0 2 -free atmosphere, a pitch having a mesophase content of at least 40 wt. per cent, the pitch being one which under quiescent conditions, forms a bulk mesophase having coalesced domains in excess of 100 microns; thermosetting the extruded shape in an oxidizing atmosphere; further heating the thermoset shape in an 0 2 -free atmosphere to form an oriented coke, mixing the coke, which has an aspect ratio of at least 2:1 with a carbonizable binder, e.g. pitch, in a ratio of 50-80 wt. per cent coke, 50-20 wt. per cent binder; extruding the mixture, and finally carbonizing and graphitizing the extrudate. The oriented coke may be ground or sized before mixing with the binder, provided an aspect ratio of at least 2:1 is maintained. In examples, spun fibres of mesophase pitch are used to form extruded rods of graphite.
Patent GB-1481095-A (GB)
Title: Xerographic reproduction process
IPC: G03G9/10
Filed: 1974-09-10
Abstract: 1481095 Coated xerographic carrier particles FUJI XEROX CO Ltd 10 Sept 1974 [10 Sept 1973] 39511/74 Heading B2E [Also in Divisions C3 and G2] Toner carrier particles comprise a core, e.g. of NaCl, NH 4 Cl, potassium aluminium chloride, Rochelle salt, NaNO 3 , potassium chlorate, granular zirconium, granular silicon, polymethyl methacrylate, glass, silicon dioxide, flint shot, iron, steel, ferrites, nickel, carborundum or mixtures thereof, coated with a polymer containing units represented by one of the general formulae (I) and (II) where R' and R<SP>2</SP> stand for a hydrocarbon residue having 1 to 12 carbon atoms and Z represents the atoms needed to complete a nitrogen containing heterocyclic group of up to 25 C atoms. Suitable monomers include vinyl compounds substituted with a residue of the formulae specified above, e.g. styrene, alkyl acrylates, alkyl methacrylates, ethylene, propylene, vinyl acetate and butadiene. Such substituted monomers include p-aminomethylstyrene, p-dimethylaminostyrene, dimethylaminomethyl acrylate, dimethylaminoethyl acrylate, dimethylaminopropyl acrylate diethylaminomethyl acrylate, diethylaminoethyl acrylate, dimethylamino methyl methacrylate, dimethylaminoethyl methacrylate, vinyl carbazole, vinyl pyridine, vinylpyrrolidone, vinyl pyrrole, vinyl piperidine, vinyl morpholine, vinyl quinoline, vinyl indole, vinyl irridazole, vinylbenzimidazole. Suitable comonomers include methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, sec-butyl acrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, neopentyl acrylate, dodecyl acrylate, hexyldecyl acrylate, tetradecyl acrylate, cyclohexyl acrylate, α-chloromethyl acrylate, α-chloroethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 3-hydroxypropyl acrylate, diethylene glycol monoacrylate, methyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, sec-butyl methacrylate, tert-butyl methacrylate, 2-ethylhexyl methacrylate, neopentyl methacrylate, dodecyl methacrylate, hexyldecyl methacrylate, tetradecyl methacrylate, cyclohexyl methacrylates, α- chloromethyl methacrylate, α-chloroethyl methacrylate, 2-hydroxyethyl methacrylate, 2- hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate and diethylene glycol monomethacrylate and compounds of the styrene series such as α-vinylstyrene, vinyl toluene, 4-bromostryrene, 4-chloro-3-fluorostryrene, 2-chlorostyrene, 2, 5-dichlorostyrene, 2, 5-difluorostyrene, 2, 4-dimethyl styrene and 4-ethylstyrene. The units (I) and (II) may be incorporated into cellulose, natural rubber, polyesters, polyacid anhydrides, polyacetols, polyamides, phenol aldehyde resins, urea-aldehyde resins, polyurethanes, polyurea resins, polyvinyl chloride, polyvinyl ester, polystyrene, polyacrylates, polyvinyl ester, polystyrene, polyacrylates, polymethacrylates, polyacrylonitrile, polymethacrylonitrile, polyvinyl ether, polyisobutylene and polybutadiene.
Patent GB-1396966-A (GB)
Title: Component parts of welded rotors
IPC: F03B11/00
Filed: 1972-08-24
Abstract: 1396966 Turbomachine rotors SOC GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES (ALSTHOM) 24 Aug 1972 [27 Aug 1971] 39525/72 Heading F1T A welded rotor, e.g. for a turbine, includes a disc 1 having an annular axial extension 2 of smaller outer diameter 3 than that 4 of the disc and against the axial end face of which is welded a corresponding extension of an adjacent disc, each extension 2 being connected to its disc 1 between an annular groove 7 disposed in the radially external portion of the extension and an annular fillet 8 on its internal portion. Stresses in the welded zone are thus reduced. The depth of groove 7 is less than or equal to half the radial thickness 5 of the welded face and at least equal to the difference between thickness 5 and axial length 6, the latter dimension being sufficient to permit insertion of welding apparatus between adjacent discs 1. The depth of groove 7 may also be such that a straight line 13 from the base 14 of the weld at an inclination of 45 degrees to the rotor axis is tangential to the rounded groove bottom. An inwardly projecting annular trapezoidal section ridge, as described in Specification 1396965 may be provided in the area of base 14.
Patent GB-1028650-A (GB)
Title: Improvements relating to threshold logic circuits
IPC: H03K19/10
Filed: 1964-09-30
Abstract: 1,028,650. Semi-conductor circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept. 30, 1964 [Oct. 31, 1963], No. 39742/64. Heading H3T. [Also in Division G4] A threshold circuit for comparing an input voltage with a decreasing ramp voltage comprises a pair of diodes 16, 18, the junction 14 of which is at the lower voltage as shown in Fig. 2. When the ramp voltage becomes less than the input voltage a signal is passed via capacitor 62 to switch a tunnel diode and cause transistor 68 to give an output at 72. A number of threshold circuits 100, 102, 104 are arranged in Fig. 3 to indicate, by comparison with a ramp voltage from a common generator 106, which of a number of signals is the highest. The first circuit to respond sends a pulse to single-shot 110 to enable gates 112, 114, 116 passing the threshold circuit signal to a corresponding latch 118, 120, 122. The output from the latch activates an indicator 124, 126 or 128.
Patent GB-345952-A (GB)
Title: Improvements in or relating to calculating machines for english currency
IPC: G06F7/46
Filed: 1929-12-30
Abstract: 345,952. Multiplying and dividing apparatus. HOFER, R. C., Kusnacht, Zurich, Switzerland. Dec. 30, 1929, No. 39777. [Class 106 (i).] Modified for non-decimal notations.-A machine of, for example, the Thomas or Monroe type and modified for dealing with British currency is provided with electrical means whereby keys depressed to represent a multiplicand may be released and keys denoting ten times that multiplicand may be automatically depressed. Each key has a cam W1 to close contacts 5, 6 when the key is depressed, the key being held down by a detent 1 fast on a shaft 3 and engaging one of two shoulders Wa, Wr. The circuit closed by the contacts extends to a magnet 14, Fig. 3, adapted to rock a lever 13 to release a pivoted arm 16 shaped at 16a to operate contacts 22, 23, 24. These contacts control circuits to one or more magents 10, Fig. 1, serving to set a key or keys corresponding with ten times the value of the original key, but the circuits are not completed until a switch D, Fig. 6, is stepped. In the zero position of this switch all circuits are open. In position I the circuits prepared by the contacts 5, 6 are closed to energize the magnets 14 and release the arms 16 to prepare the circuits for the decupled amount. In position II the operating motor M is put in circuit to multiply the original amount by the units figure of the multiplier. When the switch is turned to the next position the motor is cut out and all keys released by the closing of a circuit through the detent-operating magnets. In the fourth position the circuits of contacts 22 .. 24 are completed and the new amount is thus set up and in position V the arms 16 are restored by the energization of magnet 28 which rocks the shafts 17 to reset the arms. Circuit diagrams are given in the drawings of the Specification.