baber/WOPTO huggingface dataset:
Patent GB-1392687-A (GB)
Title: Process for dealkylation of an alkylated aromatic hydrocarbon
IPC: B01J29/00
Filed: 1973-09-28
Abstract: 1392687 Steam dealkylation of alkylaromatic hydrocarbons MITSUBISHI CHEMICAL INDUSTRIES Ltd and ASIA OIL CO Ltd 28 Sept 1973 [30 Sept 1972] 45457/73 Heading C5E Alkylaromatic hydrocarbons are dealkylated with steam at 400-1000‹ C. in the presence of a catalyst comprising at least one compound of a group IIIA metal. The catalyst preferably comprises an oxide of Y, La, Ce, Pr, Nd, Sm or Th and may also contain up to 10% U, Ba or Ca. The catalyst may be supported on Al 2 O 3 , SiO 2 -Al 2 O 3 , a zeolite, MgO or activated carbon. Sulphur or a sulphur compound (preferably H 2 S or a mercaptan), may be added to the feed in amount 0À05-5 wt. per cent. Suitable feeds include toluene, xylene, ethylbenzene, cumene and methylnaphthalene.
Patent GB-1486891-A (GB)
Title: Spark ignition systems for internal combustion engines
IPC: F02P15/00
Filed: 1973-09-28
Abstract: 1486891 Ignition system LUCAS ELECTRICAL Ltd 19 Sept 1974 [28 Sept 1973] 45468/73 Heading F1B To minimize the risk of spurious signals in a variable reluctance pick-up 16 producing a spark in an I.C. engine ignition system, the output from the pick-up 16 is integrated by a capacitor 21 and a spark is only produced when this integrated value exceeds a predetermined value and the signal from pick-up 16 has returned to zero. As shown, the control circuit includes a transistor 37 which is on when no signal appears from 16, and transistor 44 controlling current flow through the primary winding 45 is thus switched on. When a signal appears from pick-up 16, transistor 36 switches on, and transistor 37 remains on until the predetermined value is reached, when transistor 37 switches off but flow continues through the primary coil until the signal from pick-up 16 is again zero. zero. At this time transistor 36 also switches off as does transistor 44. Again, Fig. 3, (not shown),the control circuit includes a first voltage comparator (A 1 ) for detecting when the output of the pick-up 16 is zero, and a second voltage comparator (A 2 ) for comparing the integral at the output of the pick-up with a fixed voltage (8v). A gate circuit including first and second OR gates, (O 1 ), (O 2 ) produces an output pulse when the integral of the pick-up output exceeds the fixed voltage level and the output of the pick-up is zero.
Patent GB-1021454-A (GB)
Title: Improvements in or relating to glass furnaces
IPC: C03B5/235
Filed: 1962-11-30
Abstract: 1,021,454. Glass-melting furnaces; chimneys. KONINKLIJKE NEDERLANDSCHE GLASFABRIEK LEERDAM N.V. Nov. 30, 1962, No. 45545/62. Headings F4B and F4J. In a glass-melting furnace fired by an oil burner 8, a central offtake 15 extending laterally wholly over the working chamber communicates by a connection 30 with a flue 16 extending above and longitudinally of the furnace roof 2, both the connection and the flue being suspended from a framework of girders. The flue 16 rests on hook-shaped hangers 19 suspended from transverse girders 21 and supported by struts 47, 49 from vertical buckstays 20. Similarly the connection 30 is carried by hook-shaped hangers 26, 27 suspended from cross-girders 24, 25 carried by uprights 33, 34. The offtake 15 is defined by blocks 17 of heavier construction than the remaining roof blocks, and filler arches thereabove are supported from the uprights 34, Fig. 2 (not shown).
Patent GB-1469795-A (GB)
Title: Data detection system
IPC: G08B26/00
Filed: 1974-10-22
Abstract: 1469795 Selective signalling COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 22 Oct 1974 [22 Oct 1973] 45588/74 Heading G4H A data detection system, for locating activated ones of an array of data points, groups them in a hierarchy of at least three levels and locates an activated point by scanning each level in turn, starting with the lowest level, in each case until the point (or its group) has been reached. In Fig. 1, switch or relay contacts (or electronic gates) p, e.g. in a fire alarm system, are divided into q groups G1-Gq each of n sets M1-Mn, each of m contacts. Scanning counters A, B, C, clock-driven and with m, n, q outputs respectively, relate to contacts, sets and groups respectively. A 4-bit control register CR initially holds 0000 and is shifted by each pulse at a point P (see below), the input D of the register being permanently at 1. The 1st-3rd stages of this register control the counters A, B, C respectively, a 1 bit disabling the counter. The counter A scans the contacts in the sets simultaneously, the other sides of the contacts in each set being commoned to a respective AND PE11-PEnq all enabled to pass any output from the contacts by the first stage of CR via an inverter I1 and OR's PB1-PBn, counter B cycling without effect. The outputs from PE11-PEnq are commoned to AND's Q1-Qq corresponding to the groups of sets and all enabled to pass any output from PE11-PEnq by the second stage of CR via an inverter I2 and PR's PC1-PCq, counter C cycling without effect. The outputs of Q1-Qq are commoned to the point P, any signal at which shifts control register CR which now holds 1000 to disable counter A from further advance and permit counter B to scan the AND's PE11-PEnq, q at a time. When another signal is produced at point P, CR is advanced to 1100, counter B is now also disabled and counter C permitted to scan the AND's Q1-Qq. When another signal is produced at point P, CR is advanced to 1110 and counter C is now also disabled. The counts in counters A, B, C are supplied to a memory M. For protection against noise, strobing with a delayed clock is introduced at point P, and various reset-after-delay arrangements are provided for CR.
Patent GB-1170464-A (GB)
Title: Method of Making Prefabricated Building Unit
Inventor: THOMASON THOMAS VICTOR
IPC: B28B23/02
Filed: 1967-10-06
Abstract: 1,170,464. Moulding building units. HYTHE (KENT) ENG. CO. Ltd. 2 Oct., 1968 [6 Oct., 1967], No. 45854/67. Heading B5A. A prefabricated building unit is made by forming a steel reinforcing frame, locating the frame horizontally in a flat-bottomed open mould so that the frame is clear of the bottom, pouring a light weight concrete mix into the mould so that the mix fills the space between the mould base and reinforcing frame and fills at least part of the space bounded by the frame, so that its steel members are embedded in the mix, allowing the mix to set and removing the unit from the mould. The mix is of a constituency such that, on setting a smooth surface is formed in contact with the mould. The reinforcing frame is preferably made by welding tubular steel sections together and bracing the frame with a steel reinforcing mesh welded therein. As shown, the mould 5 comprises a fixed base 7, supporting a table 8 hinged to the base 7 at 9 and a flat steel plate 6 forming the bottom of the mould. A flange 11 along the hinged edge 9 of the mould forms one side wall, the others being formed by flanges 12 (13) and (14). A groove 15 is formed in wall 11 and a hinged flap 17 on the other walls permits the placing of a frame 1, in the mould. When making a wall unit the concrete mix comprising water, concrete and fine and medium sintered clay aggregates is preferably poured into the mould to the level of the top of the walls, completely enveloping the frame. When the concrete has set, the table 8 is pivoted about hinge 9 by piston and cylinder 10 to a vertical position and the panel is removed and stored in this position. In alternative embodiments, especially when moulding a ceiling unit, the frame may be located on top of the mould walls. Units such as door or window frames, conduits, waterpipes, junction boxes and fixing brackets may be located in the mould or frame before casting the concrete. The units are preferably joined by welding adjacent frames, and the built-up units may be faced by a layer of for example bricks attached to the unit by wall ties partly embedded in the surface of the unit remote from the smooth surface.
Patent GB-1394490-A (GB)
Title: Bulb sockets
IPC: F21V19/00
Filed: 1973-10-03
Abstract: 1394490 Lamp holder ROBERT BOSCH GmbH 3 Oct 1973 [5 Oct 1972] 46099/73 Heading H2E To retain an auxiliary centre-contact bulb 50 in an off-centre position in a car headlight reflector, soft plastics holder 10 is inserted from the rear through hole 28 in reflector, with partcircumferential rib 29 hooked into forward side of aperture, opposing detent 30 latched also into forward side, and two beads 32, 33 transverse to the rib-detent axis engaging the rearward side. Forward of and part of the beads, two lugs 34, 35 are biased inward to grip bulb cap 24, inserted into the assembled holder from the front. Axial slots and recesses 36, 37, 39, 40 in the periphery provide deformability, allowing entry of the bulb cap with diametral pins 23 which finally rest on the rim 25 under the action of an axial spring (Fig. 1, not shown) supplying current to centre contact 22. Behind the rib 29 a slit allows entry of an earthing contact (not shown) to touch cap 24. Rotation of the holder is prevented by projections 44, 46 in the reflector aperture engaging gaps 36, 37, while detent 30 enters recess 45. To prevent rotation of the bulb, grooves may be cut in the rear rim 25 to engage diametral pins 23 of the bulb cap. In the embodiment (Fig. 1, not shown) a central conventional headlight holder carries a sideways-projecting insulating plate supporting an axially acting leaf-spring and earthing contact for a holder according to the invention mounted off centre under the plate.
Patent GB-1159943-A (GB)
Title: Improved Carburettor
IPC: F02M7/133
Filed: 1966-10-18
Abstract: 1,159,943. Spray carburetters. HOLLEY CARBURETOR CO. Oct.18, 1966 [Oct. 20, 1965; Dec. 1, 1965], No.46503/66. Heading F1B. The idle or main fuel metering system has associated therewith an initially adjustable means which is set to limit the maximum fuel flow at idle or part throttle and is then made substantially inaccessible to prevent further adjustment. In Fig. 4 the idle adjustment needle 134 controlling idle orifice 120 is surrounded by an initially adjustable screw-threaded sleeve 122 which is initially adjusted to limit the maximum amount of fuel which can flow to the orifice 120 when needle 134 is fully withdrawn. The sleeve 122 is then locked in position by a plug 126 or by deformation of its threads and is inaccessible when the needle 134 is in position. The lower end 140, Fig. 5, of the sleeve 122 may be tapered to co-operate with a tapered surface 142 to provide a finer adjustment.
Patent GB-1509755-A (GB)
Title: Rotary filtration apparatus
IPC: B01D29/39
Filed: 1975-11-12
Abstract: 1509755 Rotary concentrator ARTISAN INDUSTRIES INC 12 Nov 1975 [18 Nov 1974] 46716/75 Heading B1D A concentrator for abrasive slurry, such as coal, comprises a cylindrical housing enclosing axially spaced annular elements 19 and a shaft 20 carrying discs 21 which extend between elements 19 to define a winding path from inlet 15 to concentrated slurry outlet 16, and the housing sections 18 between elements 19 and adjacent the peripheries of discs 21 have inwardly extending baffles 30 and axial grooves 40 which accumulate permanent deposits of solids from the slurry which protect the housing sections against abrasion. In Fig. 1, elements 19 are inward flow filter elements with individual outlets 26 to filtrate pan 24, the elements carrying sections of filter cloth (23) clamped thereto by screws. The housing is stationary and comprises end plates 13, 14 and sections 18, integral with elements 19 clamped together by tie rods 17. Shaft 20 rotates with discs 21 which are solid and carry vanes 21A. Alternatively discs 21 could be filter discs, in combination with filtering or non - filtering elements 19, and the housing could rotate, with discs 21. Stationary or rotating at a different velocity.
Patent GB-981712-A (GB)
Title: Improvements relating to the manufacture of silicon steel
Inventor: SPENCER HENRY FRANCIS
IPC: C21C5/32
Filed: 1962-12-11
Abstract: Silicon steel is manufactured by blowing molten pig iron in a tiltable vessel with oxygen and lime, preferably injected as a powder in the oxygen stream, to produce a steel base, then tilting the vessel to discharge a predetermined amount of its metallic content through a tap hole into a first tapping bottom-pour ladle to which a predetermined amount of silicon has been added, e.g. as element or Fe-Si to give 2-4% Si in the steel, bottom-pouring the metal from the first ladle into a second teeming ladle and adding further silicon, preferably to the descending stream of metal, to bring the silicon content to the desired value, and teeming the steel from the second ladle when it has reached teeming temperature.  Primary slag may be removed at an intermediate stage of the blow if the phosphorus content of the pig iron is high, e.g. 0.5-2%.
Patent GB-999780-A (GB)
Title: Improvements relating to fluorescent screens
IPC: G21K4/00
Filed: 1963-11-28
Abstract: A fluorescent screen comprises (1) a thin flexible support, (2) an adhesive layer of a chloro-sulfonated addition polymer of an olefin of 2-5 carbon atoms containing fine particles of TiO2, (3) a thin flexible layer of phosphor particles in an organic macromolecular polymeric binder and optionally, (4) a protective layer of organic polymer; at least one of the layers contains an amino coumarin brightening agent.  The phosphor may be, e.g., cadmium tungstate, zinc sulfide, zinc cadmium sulfide, zinc orthosilicate or barium or lead sulphate; the phosphor particles are preferably 4-40 m , and the phosphor layer be 10-60 mil. when wet, 1-20, preferably 4-14, mil. thick dry. The flexible support may be paper or metal foil, e.g. aluminium, or an organic polymer, e.g. cellulose acetate, cellulose propionate, cellulose acetate butyrate, ethyl cellulose; polyethylene, p.v.c., vinylidene chloride, vinyl acetate, acrylonitrile, styrene and isobutylene polymers; polystyrene; and linear polyesters, e.g. polyethylene terephthalates. The support is from 0.25 to 30, preferably 10 mil. thick, and may contain or carry a dye or finely divided pigment, e.g. titanium dioxide, lithopone, magnesium carbonate, aluminium oxide, carbon black; or may be metal coated, e.g. with aluminium; this reflective coating may be 0.3 to 1 mil. thick.  The protective layer ((4) above) may be of cellulose nitrate or acetate, or a mixed resin containing poly(methyl metha-crylate), poly-(isobutylmethacrylate) and vinyl chloride/vinyl acetate copolymer, 0.5 to 1.5 mil. thick. The phosphor may be held in a polyvinyl butyral binder, which may be mixed with a plasticizer, e.g. silicone fluids, triethylene glycol-di-(2-ethylhexoate), triethylene glycol-di-(2-ethylbutyrate), glycerol monolaurate, pentaerythritol-tetracetate, di-butyl phthalate, di-butyl sebacate, butyl ricinoleate.  Specifications 727,705, 829,268 and 929,184 are referred to.
Patent GB-991854-A (GB)
Title: Improvements in or relating to severing extruded plastic parisons
IPC: B29C48/09
Filed: 1963-11-29
Abstract: 991,854. Severing extruded plastic parisons. MONSANTO CHEMICAL CO. Nov. 29, 1963 [Dec; 4, 1962], No. 47199/63. Heading B5A. Plastic tubing, of which a selectedportion has been thinned, is severed by exerting a force on the thinned portion to sever the prior and subsequently extruded portions of tubing at the thinned portion. Plastic material from hopper 1 is plasticized in unit 2 and delivered by worm 5 to a pressure modifying passage containing a plunger 9 which controls the volume and pressure of the plastic material within the passage 8. It is then extruded in tubular form from orifice 27. The thickness of the extruded tubing is controlled by control unit 20 which reciprocates plunger 9 to vary the flow rate and pressure of the material being extruded, and reciprocates mandrel 24 to vary the internal diameter of the tubing. When a desired length of parison has been extruded, plunger 9 is withdrawn from chamber 8, mandrel 24 lowered and thin-walled tubing extruded. Separable mould halves 38, 39, are then closed about the parison portion and moved down to create an axial force which severs the tube at its thinner section. In a modification a further length of normal thickness or greater than normal thickness tubing may be extruded after the thinned portion, before the severing occurs. Heating means for the screw extruder and the die tip are provided.
Patent GB-1530326-A (GB)
Title: Dc to dc converters
IPC: H02M3/338
Filed: 1975-11-17
Abstract: 1530326 DC to DC converters WEST ELECTRIC CO Ltd 17 Nov 1975 [19 Nov 1974] 47213/75 Heading H2F A D.C.-D.C. converter comprises a push-pull oscillation circuit of two transistors 312, 313 connected with a D.C. source 304 and the primary winding of a saturable transformer 314, whose secondary winding is connected through a capacitive load 307 to the emitters of transistors 312, 313 and through diodes 135, 316  to the bases thereof, thus forming positive feedback circuits for these transistors when each one is alternately conductive to produce current through the primary winding section 314a or 314b and a resultant induced voltage in the secondary winding section 314c or 314d. Oscillation condensers 321, 323 are alternately charged as the transistors 313, 312 respectively conduct, the base currents of the latter transistors being reduced almost to zero by selecting large values for resistors 324, 326 in parallel with the condensers 321, 323. The oscillations can be maintained after switch 325 is opened until the energy in the condensers 321, 323 is discharged. In Figure 4 the positive feedback circuit includes the whole of the transformer secondary winding 419c, a capacitor 427 and either one of diodes 417, 418 according to whether transistor 413 or 412 is conductive. When switch 425 is closed, a current from source 404 flows through members 412 (emitter and base), resistor 426 and winding section 419b to induce a voltage in winding 419c, which passes current through members 427, 418, 428, 412 (emitter and base) and 415 to make transistor 412 conductive and so produce a large current through winding section 419a. The resultant induced voltage in winding 419c charges condenser 428 which, when its voltage reaches a desired value after a number of converter oscillations, discharges through a xenon-gas flash lamp 429 when a firing voltage is applied to its trigger electrode 430. To improve the starting of the circuit, a choke coil (531) may be connected between the source 404 and the midpoint of the transformer primary winding, Fig. 5 (not shown). Typical design details are given for this modification and the embodiment of Fig. 4 which, together with the embodiment of Fig. 3, may be simplified, Figs. 1 and 2 (not shown).
Patent GB-974791-A (GB)
Title: Improvements in or relating to electric fencing
IPC: H01B17/14
Filed: 1962-12-14
Abstract: 974,791. Electrified fencing. E. S. PATEY. Oct. 30, 1963 [Dec. 14, 1962], No. 47274/62. Heading E1B. [Also in Division H2]. Electrified fencing comprises posts in the form of two braced uprights 1a, 1b of different heights each supporting an electrified wire 4a or 4b. The uprights are each provided with a plastic covered pig-tail at their upper ends, a wire coil optionally covering the plastic of the pig-tail to prevent the fence wire cutting into it. The posts may be provided with struts or stays 6 having pegs 7 driven into the ground.
Patent GB-978099-A (GB)
Title: Kramer system
Inventor: CLAPHAM HAROLD EDWARD CAMERON
IPC: H02K17/40
Filed: 1962-12-14
Abstract: 978,099. Control of A.C. motors. BRUCE PEEBLES & CO. Ltd., and H. E. C. CLAPHAM. Dec. 10, 1963 [Dec. 14, 1962], No. 47349/62. Heading H2J. An induction motor has a D.C. machine M on the same shaft, the secondary voltage from the A.C. motor being supplied through a rectifier to the armature of the D.C. machine. For operation at low speeds, a second D.C. machine A is provided with means for connecting it in series with the machine M. The speed is first reduced by applying full field to the machine M, and switch C is then closed and switch B is opened. During this switching operation, the voltage of the machine A is zero, but, as the field of the machine A is strengthened, the speed falls to a desired value. The machine A may be coupled to the shaft of the induction motor, or may be coupled to an induction generator.
Patent GB-1178318-A (GB)
Title: Process for the Manufacture of Nitric Acid.
IPC: C01B21/26
Filed: 1967-10-19
Abstract: 1,178,318. Nitric acid. SOC. BELGE DE L'AZOTE ET DES PRODUITS CHEMIQUES DU MARLY S.A. 19 Oct., 1967 [15 Nov., 1966], No. 47543/67. Heading C1A. More concentrated nitric acid is produced by treating nitric acid containing dissolved oxides of nitrogen in a tower, containing devices to ensure good gas-liquid contact, with air and/or oxygen flowing in the same direction as the acid in order to oxidize the dissolved oxides, whereafter the nitric acid is treated in counterflow with air in order to remove the oxides still dissolved. The treatment with air and/or oxygen is preferably carried out at 20-50‹ C. and under from 1 to 10 atmospheres. The counter-flow treatment with air may be carried out at a pressure between atmospheric pressure and that used during the oxidation. Conventional gas-liquid contact apparatus is used.
Patent GB-476407-A (GB)
Abstract: 476,407. Mercury switches. CHILOWSKY, C. March 5, 1937, No. 6557. Convention date, March 6, 1936. [Class 38 (v)] [Also in Group XX] Relates to apparatus of the character described in Specifications 463,994 and 469,636 for converting variations of luminosity into mechanical actions, comprising a closed chamber containing a liquid such as HCl which is decomposed by electrolysis into constituents capable of recombining under the action of light, so that the gas pressure within the chamber depends on the intensity of the light incident on the chamber. In Fig. 1, a glass membrane 1 is enclosed between glass plates 2, 3, the inner surfaces of which are concave. The upper surface of the membrane communicates with the chamber 7 containing HCl &c., and the lower surface is provided with a reinforcing plate 4 carrying a rod 5 intended for opening or closing electric circuits. In Fig. 8 an expansible member consisting of a glass bellows 29 communicates with the liquid chamber 7 and is surrounded by mercury in a vessel 20 having a tubular extension 21 into which project electric contact members 22, 23. In Fig. 10 the rod 5 attached to the membrane 1 acts on a smaller membrane 25 closing one end of a capillary tube 26 containing mercury and provided with contacts 28, 28<1>.