baber/WOPTO huggingface dataset:
Patent GB-492344-A (GB)
Title: Improved treatment of ammoniacal solutions of metal salts
IPC: C22B15/00
Filed: 1937-03-18
Abstract: Ammoniacal metal salt solutions, after clarification if necessary, are passed through a cation exchanger of acid character whereby the metals in complex solution are absorbed in the form of ammine while the ammonia passes through unabsorbed.  Suitable exchangers are coal activated with acid, resins having an acid character, e.g. as described in Specification 450,308, silica gel and hydrogen zeolites. The ammoniacal filtrate may then be re-used as such, if desired after replenishment with ammonia, e.g. in metallurgical leaching. Alternatively, the ammonia may be retained in a subsequent filter charged with an absorbent of feeble acid character, i.e. silica gel, from which the ammonia may be recovered by thermal treatment, e.g. by means of steam.  The exchanger charged with metal values may be regenerated by treatment with a suitable acid, the resulting solution containing salts of the metals and ammonium salt equivalent to the ammonia content of the metal ammine.  If desired, the ammonium content of the metal ammine can be wholly or partly removed by heat treatment prior to the acid treatment.  A selective removal of heavy metals from a solution may be achieved by the use of hydrogen ion exchangers which exert selective absorption.  If in the subsequent stage, it is desired to recover also the ammonia present as ammonium salt, the liquid is passed through a hydrogen ion exchanger of strong acid character, e.g. a sulphonated resin, which may be regenerated by treatment with acid with the formation of the corresponding ammonium salt.  If it is desired to recover the total ammonia as free ammonia, the filtrate is passed through a hydroxyl ion exchanger, e.g. an amine resin as described in Specification 450,309, the ammonia now present in the free form being finally bound by an absorbent having having a feeble acid character.  According to examples: (1) an ammoniacal copper solution is passed first through silica gel in which copper tetramine is absorbed and subsequently recovered by treating the gel with hydrochloric acid and then through further silica gel in which the ammonia is absorbed and recovered by treatment with steam; (2) an ammoniacal solution containing copper, zinc, cobalt and traces of silver obtained by leaching burnt copper pyrites with aqueous ammonia containing ammonium chloride is passed through a condensate of phenol sulphonic acid with formaldehyde, the filtrate after replenishment with ammonia being returned to the leaching step and the absorbent being regenerated as described in example (1); (3) silica gel is shown to be more favourable to the absorption of zinc, and anthracite sulphonated with oleum more favourable to the absorption of copper, when brought into contact with an ammoniacal solution containing both these metals; (4) an ammoniacal solution containing copper and zinc is passed through a battery of filters consisting of a phenol-formaldehyde condensation product containing-o -sulphonic acid groups, the copper being absorbed prior to the zinc.
Patent GB-744737-A (GB)
Title: Improvements in or relating to installations for permanently crimping synthetic yarns
IPC: D02G1/02
Filed: 1954-03-19
Abstract: 744,737. Crimping yarns; driving and heating twist tubes. HEBERLEIN & CO., AKT.-GES. March 19, 1954 [March 25, 1953; Sept. 15, 1953; Sept. 17, 1953], No. 8084/54. Classes 120 (2) and 120 (3). Apparatus for crimping synthetic yarn includes falsetwisting units having common operating means each of which units comprises a yarn-supplying device, a first yarn-transporting device, apparatus for steaming the yarn under pressure, a high-speed twister motor having a hollow shaft which carries the twister, a second yarn-transporting device, and a yarn-reeling device. As shown in Fig. 1, a framework 1 carries several units each having a bobbin 2 delivering yarn 42 through guides 3 to a pair of rollers 4 which feed the yarn through a tubular steaming apparatus 5 sealed off at both ends by detachable labyrinth seals 6, 61, Fig. 7 (not shown), or by capillary tubes arranged in a protective tube, to a twister 7 comprising a three-phase alternating current squirrel cage motor with air bearings for the rotor shaft, thence through rollers 8 over a tension-regulating jockey guide on an arm 9 and a laterally oscillating guide 10 to a reeling device 11. The framework 1 supports driving means, Fig. 2, comprising an electric motor 12, drive shafts 13 and 14 for the pairs of rollers as at 4 and 8 and a shaft 15 for the devices as at 11, which shafts can be driven at independently adjustable speeds by means of infinitely variable transmission gears 16, 17, 18; the circumferential speed of rollers 8 normally exceeds the speed of rollers 4. As shown in Fig. 3, steam is supplied to apparatus 5 from a common pipe 30 in which the pressure is regulated by means of a reducing and regulating valve 33 and through branch pipes 32 each having a stopceck 31; condensed water in the apparatus 5 flows off in the pipes 38 into a manifold 39 leading to a steam trap 40. The seals 6 and 6<SP>1</SP> may have protective hoods for retention of steam or water escaping from the apparatus 5 and for protection against moisture of the motors 7, the two sets of hoods having common ducts which connect with an exhaust means. Compressed air for the bearings of the twister motors is supplied by a compressor 21 through a common manifold 22 and branch pipes 41 via a stop-cock 23, filter 25, and pressure-reducing valve 26; when the air pressure falls to a predetermined minimum a pressure-sensitive relay 27 operates to disconnect the three-phase circuit 20 from a generator 19 by means of a switch 28. Each line 41 includes a valve interlocked with a switch 43 to prevent compressed air flowing through the motor bearings when the motor is at a standstill ; alternatively, the bearings may be protected from moisture which might be condensed from the compressed air, by heating the motor when not in use by operation of a changeover switch which disconnects the motor from the three-phase supply and connects two phases of the motor winding with a single-phase alternating current supply, Fig. 5 (not shown). Specification 744,735 is referred to.
Patent GB-941768-A (GB)
Title: Telescopic pit props having external guard shrouds
Inventor: WILSON JOHN JAMES
IPC: E21D15/44
Filed: 1961-03-06
Abstract: 941,768. Hydraulic pit props. DOWTY MINING EQUIPMENT Ltd. March 5, 1962 [March 6, 1961], No. 8107/61. Heading EIE. The cylinder 12 or piston 14 of an hydraulic pit prop 11 is partially enclosed in a protective shroud 19 so as to define therewith an annular space 20 for the reception of a shockabsorbing material such as bitumen, polyvinyl chloride or polyisocyonates in forming composition. The guard wire may be made of sheet steel or a glass fibre impregnated with a spongy resin.
Patent GB-747518-A (GB)
Title: Improvements in or relating to ball-and-socket joints
IPC: F16C11/06
Filed: 1954-03-19
Abstract: 747,518. Ball-and-socket joints. MOSKOVITZ, M. A. March 19, 1954 No. 8121/54. Class 65 (2). In a ball-and-socket joint, a part-spherical ball head 4 is formed with a rounded recess 5 engaged by a button element 9 so as to allow relative angular movement between the ball head and the button element, the latter being interposed between the ball head and a pressure element 8 urged into contact with the button element by resilient means, and the interengaging faces of the pressure element and button element are planar, so as to permit sliding movement of one element relatively to the other. The ball head seats on an oilimpregnated ring 6 fixed in the socket 1. The space between the ball head and the plateshaped pressure element 8 defines a lubricant reservoir 20, the latter being sealed by an oilresistant synthetic rubber cup 13 disposed above plate 8. The cup receives a rubber plug 12 which is initially of frusto-conical form and is compressed by a closure plate 19, the plug being formed in its upper surface with a central recess 14 and radial grooves 15. In a modification, a central bore formed in members 12 and 13 houses a compression spring which abuts the members 8 and 19.
Patent GB-244623-A (GB)
Title: Improved manufacture of fuel briquettes
IPC: C10L5/36
Filed: 1925-03-26
Abstract: 244,623. Welton, P. E. March 26, 1923. Composition fuel.-Briquettes of porous granular character consist of hollow cylinders A with broken jagged ends and comprise a mixture of coal culm and a binder of a high melting point petroleum residue, such as granulated paraffin, and sulphite liquor. The briquettes a.re broken off from an extruded column of material so as to produce projections C and are heated to drive off moisture and melt the petroleum residue, which coats the sulphite and prevents it reabsorbing moisture. In a modication the cylinders have a solid core comprising, e.g. coal, sawdust, and unrefined paraffin. Specification 244,624 is referred to.
Patent GB-824295-A (GB)
Title: Improvements in and relating to tags for key rings
IPC: G09F3/18
Filed: 1956-03-16
Abstract: 824,295. Tags for key rings. GILLESPIE, P. J., and IRISH GOODWILL NOVELTES Ltd. March 16, 1956 [May 16, 1955], No. 8254/56. Class 73 A tag for attachment to a key ring comprises a backing 1 of opaque coloured plastic sheet material located between two facings 2, 3 of transparent plastic material which are sealed marginally to the backing sheet 1 along a portion 4 of its periphery, the facings and backing being apertured at a coincident position 5 near the unsealed portion 7 of their peripheries. A slip of paper, card or the like bearing information or indicia is inserted in each of the two pockets formed by the backing 1 and facings 2, 3 and the ring 6 passed through the aperture 5. The ring 6 serves to retain the paper slips in the pockets, but if desired the pockets may be permanently closed by sealing the portion 7. The ring 6 may comprise a double loop.
Patent GB-268373-A (GB)
Title: Improvements in or relating to printing plates and similar devices for use in addressing machines and the like
IPC: B41L47/02
Filed: 1927-03-25
Abstract: 268,373. Addressograph, Ltd., (Assignees of Duncan, J. S.). March 27, 1926, [Convention date]. Addressing and like machines; printing-surfaces.-A printing-plate for use in addressing and similar printing machines and of the kind carrying detachable index tabs 9 co-operating with feeler devices to select the printing-plates from which an impression is required is provided with openings 12 forming an alternative or additional means of control. An address-plate 6 is clipped in the usual way on a frame 5, which is provided with a row of openings 12, slots 7, 8 forming keepers for the stems 13 of the tabs 9, and protuberances 11 engaging holes 10 in the stems. The stems 13 may be elongated so as to obstruct the openings 12, and the tabs may have various shapes according to the control system provided. Retaining-devices 17, 18 may be provided for the usual information card, which has openings coinciding with the openings 12.
Patent GB-660398-A (GB)
Title: Process for obtaining laminated products
IPC: B32B27/00
Filed: 1949-03-28
Abstract: An adhesive for securing solid polytetrafluoroethylene to itself or to metal, glass, mica, asbestos, chinaware, plastics, natural or synthetic resins, or wood, comprises an aqueous 10-70 per cent by weight dispersion of colloidal polytetrafluorethylene. A dilute aqueous polytetrafluorethylene dispersion obtained by polymerizing in the presence of water is neutralized with ammonia, and an aqueous solution of a surface-active agent, e.g. sodium dodecyl sulphate or polyammonium styrene/maleate, is added. The polymer is flocculated with 1 per cent hydrochloric acid and the mixture centrifuged.  The supernatant liquid is decanted and the sedimented floc taken up in concentrated aqueous ammonia. Specification 631,504 is referred to.ALSO:Reaction kettles are rendered resistant to chemicals by securing a coating of solid polytetrafluoroethylene thereto by means of an adhesive comprising an aqueous 10-70 per cent by weight dispersion of polytetrafluoroethylene.  Specification 631,504, [Group IV(a)], is referred to.
Patent GB-940934-A (GB)
Title: Electrical switch, socket, junction or like boxes
Inventor: SPARROW FREDERICK GORDON
IPC: H02G3/14
Filed: 1961-03-08
Abstract: 940,934. Switch cases. MIDLAND ELECTRIC MANUFACTURING CO. Ltd. March 7, 1962 [March 8, 1961], No. 8417/61. Heading H2B. The metal body portion 11 of a wall box is provided with two or more screw-receiving insulating blocks 13 having elongated slots 15 receiving self-tapping screws 16 for securing an insulating cover-plate 12 to the body portion 11 after it has been correctly positioned. Each block 13 is retained in the body portion 11 by tongues 14 pressed therefrom engaging over lugs 10 on the block.
Patent GB-559645-A (GB)
Title: Improvements in or relating to the manufacture of concrete or other slabs
IPC: B28B3/12
Filed: 1942-06-22
Abstract: 559,645. Moulding concrete &c. slabs. AIREY, Sir E. June 22, 1942, No. 8540. [Class 87 (ii)] The palette boards or moulds 3 are fed in a continuous chain along stationary spaced tracks 2 by rollers 5 which frictionally engage either lateral flanges 3b on the boards or moulds, or carrier means which support the boards or moulds. The boards &c. 3 push one another over the tracks beneath a feed hopper 8 having a compressing roller 10 and a shoe or blade 12 which allows a slight vertical expansion of the compressed material. The roller 10 may move faster than the boards, thus smoothing the concrete &c. The side walls of the hopper in front of the roller 10 may diverge to allow expansion of the slab edges. Pendant spikes 19 score the surface of the concrete &c. to afford keys for the latter with other material. A knife 13, depressed by co-action of notches 6 in the mould bases with a weight-depressed lever 14, cuts the material into slabs. The moulds 3 may have grooved bases, a similarly grooved roller being disposed under the roller 10. The carrier means may include pins for locating wire mesh on the board to form a reinforcement in the slab. Expanded metal or rods also may be used as reinforcement. The boards may be moistened to cause the concrete to run and surround the reinforcement.
Patent GB-567212-A (GB)
Title: Improvements relating to timber-faced concrete slabs or like building units
IPC: E04F11/16
Filed: 1943-05-28
Abstract: 567,212. Building slabs. STENT PRECAST CONCRETE, Ltd., and STENT, D. H. May 28, 1943, No. 8558. [Class 87 (i)] A composite slab which may be flat or formed as a stair tread d, as shown, comprises a slab a of wood or plywood, to the back of which are secured dovetail wooden strips b by synthetic resin or other glues, screws or otherwise and a slab of concrete c subsequently cast to the back thereof, the corner being faced with a timber edging strip e.
Patent GB-1212151-A (GB)
Title: The production of recordable data of, preferably, non-recurring events in the nano- and subnano-second range
IPC: G01R13/32
Filed: 1969-02-17
Abstract: 1,212,151. Cathode-ray tube displays. SIEMENS A.G. 17 Feb., 1969 [16 Feb., 1968], No. 8566/69. Heading H4T. In an arrangement for producing recordable data of short duration events (i.e. events having a duration in the nano and subnano-second range) an electrical representation of the event is supplied to a delay line provided with a plurality of non-reflecting taps and terminated by its characteristic impedance, the taps being connected to respective sampling outputs of a sampling signal path in which the passage of a sampling signal is initiated by the electrical representation, the sampling signal travelling of a speed which so differs from the speed of propagation of the electrical representation along the delay line that momentary values of the electrical representation which succeed one another in time are collected from the taps by the sampling signal. The sampled values may then be supplied to a cathode-ray display tube or an X-Y recorder or to other analogue or digital evaluating devices. In Fig. 1, which shows the embodiment of the invention, the electrical representation is supplied at E to the delay line V which is provided with taps 1 to 100 and terminated by its characteristic impedance A. The taps are connected to sampling devices S1 to S100 controlled by respective stages Z1 to Z100 of a shift register or a ring counter forming the sampling signal path and in which a sampling signal initiated in a control circuit S t  by the input at E, is propagated. The samples so derived are " collected" by switch means Sch (comprising e.g. an electronic switching device) and supplied to display means such as a cathode-ray tube or to other utilization devices. The sampling durations are short relative to the transit time of the electrical representation between any two adjacent taps and the transit time of the sampling signal between any two adjacent sampling points may be longer or shorter than the transit time of the electrical representation between the corresponding taps. Spurious pulses produced in the delay line by the sampling action and which may be reflected by an incorrectly terminated source (i.e. input end E) may be reduced by incorporating attenuating members in the delay line. To reduce transit time the delay line and the sampling path are preferably of circular form and concentrically disposed with a mean radius of about 30 cm. The construction of the control circuit S t  is described with reference to a block diagram (Fig. 2, not shown).
Patent GB-249679-A (GB)
Title: A new or improved apparatus for vapourizing and gasifying oils and/or solid fuels for use with internal combustion engines and the like
IPC: F02B45/02
Filed: 1925-03-31
Abstract: 249,679. Hodgson, A. E., and Jones, N. C. March 31, 1925. Oil gas.-An oil gas retort t set within the combustion zone of a producer, for the purpose of supplying an engine with oil gas and producer gas either alone or in combination, has two compartments t<1>, t<2> and the oil is supplied through a preheating coil 4. A drip feed or needle valve 8 may be connected to the engine throttle to regulate the oil supply. The oil gas escapes through a pipe 11 to a separating chamber 12, wherein oil is deposited at starting, and passes thence either to the producer gas pipe 16 or directly to the engine 20 through a T-piece 18 having throttle valves 21, 22, 24.
Patent GB-1419743-A (GB)
Title: Cutting inserts suitable for metal cutting machine tools
IPC: B23B27/16
Filed: 1974-02-26
Abstract: 1419743 Cutting inserts CARMET CO 26 Feb 1974 [15 March 1973] 8653/74 Heading B3B A cutting insert comprises a body having parallel top and bottom faces and at least three sides 20 substantially normal to and extending between said faces, each of said faces having a recess 22 along each edge-thereof, each of said recesses extending from a first end of the associated side towards the second end of the associated side and terminating some distance away from the recess in the next succeeding side, each of said recesses 22 having an outer recess surface forming a land 28 inclined away from the associated face in the direction from the said one end towards the second end, said outer recess surface also extending inwardly at a substantially constant angle and inclined away from the associated face, each recess having an inner recess surface 30 extending from the inner edge of said outer recess surface 30 extending from the inner edge of said outer recess surface and inclined upwardly towards the associated face, the lines of intersection of the inner recess surfaces 30 with the associated face defining a centre island 26 and the surface on said associated face between said recesses forming extensions 24 of said centre island, the island extensions 24 on one face being at opposite ends of the associated sides from the island extension on the other face. The land 28 may be straight and planar, arcuate, or part straight and part arcuate. The insert is held in a tool holder (Fig. 1, not shown) by a screw clamp (12) which bears in a central hole 10 to clamp the insert, and a shim (8) into a pocket (4) and against a rear wall thereof. The tool holder and pocket (4) are arranged to allow positive, neutral or negative rake cutting.
Patent GB-401948-A (GB)
Title: Improvements in or relating to matrix devices for the treatment of teeth
IPC: A61C5/85
Filed: 1933-03-22
Abstract: 401,948. Dental matrix bands and matrix retainers. SCHOTZ, E., 60, Plantagenstrasse, K³strin, Germany. March 22. 1933, No. 8679. [Class 81 (ii).] A dental matrix band is reduced in width at its ends so that the straight edge may be drawn tightly against the neck of the tooth. In the form shown in Figs. 1 and 2 a band a is formed with narrow ends a<1> which are passed through a slot in the rotary spindle e of a tensioning device c. The extremities of the parts a<1> may be bent over or may be thickened to prevent withdrawal, and may be soldered or welded together. The body of the tensioning device is formed with a projection c<2> which bears against the neck of the tooth. The spindle e carries a worm wheel engaged by a worm y on a shaft g<1> provided with pins h to be engaged by a detachable key i. In a modification, Fig. 6, the matrix band b is curved transversely at the part engaging the tooth.
Patent GB-147257-A (GB)
Title: Improvements relating to the manufacture of butter substitutes, edible fats and the like
IPC: A23D7/05
Filed: 1919-04-07
Abstract: 147,257. Clayton, W., and Nodder, G. April 7, 1919. Movable-abutment type.-The emulsion for the manufacture of margarine &c. is forced through a kneading apparatus by means of a rotary pump, in which cooling takes place. The emulsion enters by a passage g and is driven forward by the action of a screw-threaded drum a co-acting with sets of toothed wheels c. A cooling-medium is circulated through the drum a by means of the hollow shaft d.
Patent GB-210660-A (GB)
Title: Improvements in oil control rings for pistons
IPC: F16J9/20
Filed: 1923-03-28
Abstract: 210,660. Du Bois, E. J., and Du Bois, G. C. March 28, 1923. No Patent granted (Sealing fee not paid). Pistons. - A split oil-scraping ring is formed with a shallow recess 8, Fig. 2, or two recesses 8<a>, 9<a>, Fig. 4, forming a side or middle flange 10 or 10<a>, having parallel sides, and preferably of less than half the width of the ring. The depth of the recesses 8, 8<a>, 9<a> is only sufficient to clear the cylinder wall during the life of the ring.
Patent GB-415183-A (GB)
Title: Improvements relating to electric discharge tubes particularly gasfilled luminous tubes
IPC: H05B41/232
Filed: 1933-03-23
Abstract: 415,183. Discharge lamps. SCHALLREUTER, W. L. W., 73, Cambridge Terrace, Hyde Park, London. March 23, 1933, No. 8858. [Class 39 (i).] A system for supplying lamps comprises a transformer having its secondary in a number of sections connected together and one or more condensers in series with the tube or tubes and -having one terminal earthed. In one form a transformer secondary is split and a condenser having one plate earthed is inserted in the centre of the secondary in series. The output terminals of the secondary supply a tube. As shown, the secondary 2 is split and each half feeds a tube 1. Condensers 3, having one plate earthed at 4 are arranged in series with the tubes. In another modification, one of the tubes 1 is replaced by two smaller tubes, each having a condenser in series and connected in parallel across one half of the secondary winding. In a further modification, the secondary windings of a 3-phase transformer feed tubes 1 having condensers in series with them. One plate of each condenser is connected to the neutral point of the transformer, which is earthed.