baber/WOPTO huggingface dataset:
Patent GB-1497246-A (GB)
Title: Extraction and purification of silver
IPC: C25C1/20
Filed: 1976-05-27
Abstract: 1497246 Recovery of silver AMAX Inc 27 May 1976 [25 July 1975] 22110/76 Heading C1A Silver is recovered from silver sulphate containing materials by forming a slurry of the material in a solution of a metal nitrate which is selective to metathetical exchange with silver sulphate and not with other metal sulphates present, the amount of metal nitrate being at least sufficient stoichiometrically to effect said metathetical exchange with the silver sulphate to form an insoluble metal sulphate and a solution of silver nitrate which is separated from the residue. The nitrate may be of Ba, Sr, Pb or preferably Ca. The pH of the solution is preferably adjusted up to 6 to precipitate out impurities by hydrolysis and the purified silver nitrate solution is separated therefrom. Ferric ions may be added to the solution prior to hydrolysis to promote precipitation of the hydrolysed impurities. Silver may be recovered from the thus purified solution by electrolysis or by adjusting pH to at least 8, separating the thus precipitated silver hydrous oxide and calcining at above 300‹ C. The process is particularly directed to the extraction of silver from anode slimes produced during electro refining of anode copper which contains Ag and at least one of Cu, Ni, Fe, Te, Pb, Se, As, Bi, Sn, Sb and precious metals. In an embodiment anode slimes 25 are subjected to sulphation roast 26 whereby Fe is removed in the off gas 27. The residue is leached with water or dilute acid to dissolve soluble metal sulphates, e.g. Cu and Ni. Any silver present in the filtrate may be recovered by cementation 35. The residue 37 from the leach is slurried with calcium nitrate solution, typically at 15-110‹ C. for about half an hour. The reacted slurry is filtered and the residue is treated for recovery of precious metals and tellurium. The silver nitrate solution 40 is purified by addition of Ca(OH) 2  to raise pH to 5À6 to produce a mixed precipitate of hydrous oxides and basic nitrates which are filtered off. The pH of the purified solution is then raised with further Ca(OH) 2  to 8À3 to precipitate silver hydrous oxide or is electrolysed. The calcium nitrate solution is recycled to the leach stage 38.
Patent GB-468729-A (GB)
Title: Apparatus for the thermal conversion of hydrocarbons into valuable products
IPC: C07C2/76
Filed: 1935-11-06
Abstract: A non-scaling steel alloy sold under the Registered Trade Mark "Sicromal" contains 6-23 per cent of chromium, 0,8-2 per cent of aluminium, up to about 1 per cent of silicon, small quantities of molybdenum and vanadium, and less than 0,01 per cent of carbon.
Patent GB-916746-A (GB)
Title: Improved seat construction
IPC: B60N2/30
Filed: 1961-06-20
Abstract: 916,746. Vehicle seats. FORD MOTOR CO. Ltd. June 20, 1961 [July 15, 1960], No. 22259/61. Class 52 (2). [Also in Group XXXII] A seat structure comprises a horizontal seat frame 14 which extends transversely of a vehicle body and is supported so that it c an swing about a vertical pivot axis 17, horizontal cushion means 35 pivotally mounted at 33 on the frame 14 for swinging movement from a position above the frame 14 to a stored position above the floor structure 11 and forwardly of the seat frame 14, and a seat back assembly 41, 42 pivotally supported adjacent the rear edge of the seat frame so that it can be swung forwardly about an axis 39, 43, 51, 54 into the space above the frame 14 after the seat cushion 35 has been swung into stored position, latch means 59, 75 releasably restraining the seat back assembly 41, 42 against swinging movement about the axis 39, 43, 51, 54, the seat back assembly 41, 42 when in latched condition being swingable about a second axis 37, 46 and means in the form of a bell crank lever arm 61, link 65 and arm 67 which connect the seat back assembly to the floor structure 11 and operative upon the seat back assembly being swung about the second axis 37, 46 to swing the seat structure about the vertical pivot axis 17 to a forwardly angularly displaced position relative to its transversely extending position. The underside 36 of the seat cushion 35 and the back 78, 79 of the seat back assembly when in the stored position (Fig. 3) provide a cargo carrying floor structure.
Patent GB-1369945-A (GB)
Title: Torque compensated walking beam
IPC: B60K17/04
Filed: 1973-05-10
Abstract: 1369945 Vehicle transmission gearing LOCKHEED AIRCRAFT CORP 10 May 1973 [22 May 1972] 22399/73 Heading B7H  In a materials handling vehicle having at each side a walking beam suspension including a walking beam housing 3 rotatably mounted on a body part 2, ground wheels at each end of the beam are driven from a drive shaft 5 on the body through chain drives 8 and planetary hub reduction gears having reaction members which are connected to the body part 2 so that the torque reaction of the reduction gears is transmitted to the vehicle body instead of to the walking beam housing 3. Each planetary hub reduction gear comprises a sun gear 11 on a shaft driven by the chain drive 8, planet gears 12 carried by the chain drive 8, planet gears 12 carried by hub mounting means 13, and a ring gear 14 having a reaction lever connected by a link 17 to the body part 2.
Patent GB-1155065-A (GB)
Title: A Valve for Controlling The Flow Of Hydraulic Media
IPC: F16K1/16
Filed: 1967-05-15
Abstract: 1,155,065. Valves. MASCHINENFABRIK AUGSBURG - NURNBERG A.G. 15 May, 1967 [10 June, 1966], No. 22407/67. Heading F2V. [Also in Division F4] A balanced valve comprises a pair of rectangular closure plates 12, 13 supported by spaced arms 6, (9) for rotation about an axis 5. The plates co-operate with openings 3, 4 in a seat 2 and abut opposite sides of this seat in the closed position. In the valve of Fig. 5, two sets of plates 12, 13 are mounted on a common shaft at right-angles to each other to connect inlet 26 alternately to one of the outlets 27, 28 via openings in seat 29. In Figs. 6 and 7 (not shown) the inlet and outlet of a condenser or heat exchanger are each controlled by a valve arranged as in Fig. 5, the two valves being mounted on a common shaft (42, 56). The openings may be of unequal size.
Patent GB-785805-A (GB)
Title: Improvements in or relating to fractionation in coker scrubber of heavy gas oils containing a high concentration of metal contaminants
IPC: C10G9/32
Filed: 1955-08-05
Abstract: <PICT:0785805/III/1> In a coking process wherein a reduced crude oil introduced by a line 2 is contacted with a fluidized bed 5 of hot particles, such as coke, vapours being removed from the reaction zone to a scrubbing-fractionation zone 18, a heavy gas oil containing metal contaminants is fed by a line 30 to the scrubber-fractionator 18, where the vapours are cooled by a stream of quench oil introduced through a line 21 to condense a heavy fraction containing the metal contaminants which is removed by a line 24, and a gas oil product fraction, including that derived from the contaminated oil feed, free of metal contaminants is removed by a line 31.  The metal contaminants are nickel, vanadium and iron organic complexes.  The bed of coke particles is fluidized by steam introduced by a line 3, and is heated by removing particles by a line 8 to a heater and returning them by a line 9.  Other particles such as spent catalyst, pumice, sand, kieselguhr, carborundum and alumina, may be used in place of the coke.  The contaminated heavy gas oil may boil in the range 800 DEG  to 1350 DEG  F., and the temperature at the bottom of tower 18 is controlled by the quench oil to obtain a condensate having an initial boiling point in the range of 950 DEG  to 1050 DEG F.  The quench oil introduced by line 21 is a part of the condensate in line 24 passed through a cooler 26.  The remaining condensate in line 24 may be returned by a line 34 to the bed to deposit the metal contaminants on the coke.  A part of the gas oil removed by line 31 may be returned to the lower part of tower 18 by a line 32 as additional scrubbing and cooling medium, and another part may be passed through a cooler 33 to the top of the tower as reflux.
Patent GB-1338976-A (GB)
Title: Web feed mechanisms
IPC: G06K15/16
Filed: 1972-05-15
Abstract: 1338976 Feeding webs SIEMENS AG 15 May 1972 [19 May 1971] 22651/72 Heading B6F -  Pin feed mechanism comprises a belt having pins S, and coacting therewith guide rollers AR having grooved peripheries to receive the pins S. The rollers AR each comprise a ring RI of flexible synthetic plastics material mounted on a hub of light alloy or plastics. The rollers are mounted on a spring biased bracket SW supporting a yoke LB through compression springs (GF, Fig. 1, not shown).
Patent GB-442163-A (GB)
Title: Improvements relating to the manufacture of cement in rotary kiln plants
IPC: F27D13/00
Filed: 1934-08-03
Abstract: 442,163. Rotary cement kilns. FASTING, J. S., 9, Monrads Alle, Valby, near Copenhagen. Aug. 3, 1934, No. 22703. [Class 51 (ii)] In the burning of cement slurry in a rotary kiln provided with a preheater arranged outside the kiln and containing heat-transmitting elements, part of the slurry is passed through the preheater to the kiln and the remainder, either unheated or separately preheated to a lesser extent, is injected directly into the kiln and serves to cool the kiln gases somewhat before they reach the heat - transmitting elements in the preheater. The preheater may be stationary, in which case the heat-transmitting elements are preferably movable, or immovable, in which case the heat-transmitting elements may be fixed within it. In the construction shown in Fig. 4, the preheater comprises a shell 2 fixed around the end of the kiln 1. The space between the shell and the kiln is divided by longitudinal partitions which constitute heat-transmitting elements. A single spraying nozzle 4 sprays slurry both into the kiln and into the preheater. The dried slurry from the preheater enters the kiln through a pipe 19. In the construction shown in Fig. 6, the preheater comprises a drum 2 surrounding the end of the kiln 1 and oppositely inclined. The drum is connected to the kiln by a chain 30 so that it rotates with the kiln. Slurry is sprayed directly into the kiln by a nozzle 4 and is fed into the preheater by a shoot 24. The slurry is heated by chain curtains 27 and when it reaches the back of the drum is fed into the kiln by scoops 25 and a shoot 26. In another modification, the preheater is fixed and the heat-transmitting elements are endless chain curtains mounted on rollers.
Patent GB-225310-A (GB)
Title: Improvements in inflating valves
IPC: F16K15/20
Filed: 1923-09-10
Abstract: 225,310. Hart, H. R. Sept. 10. 1923. Connecting to football bladders or the like; protecting covers.-An inflating-valve for a football bladder or the like comprises a valve tube b, the upper end of which, b<1>, projects through the bladder and is secured by a nut e which clamps the rubber a against a flange b<2>. A tongue f<2> with felt lining f' is clamped against a thin metal washer d by a nut g to retain the bladder in proper position. A cap h having a rounded head is screwed into the outer end of the valve tube. the whole device projecting as little as possible outside the bladder.
Patent GB-630077-A (GB)
Title: Improvements in flat irons
IPC: D06F75/28
Filed: 1946-07-31
Abstract: 630,077. Hand-irons. WILKINSON, G. H., DIVALL, R. W., and METCALFE, C. July 31, 1946, No. 22751. [Class 138 (ii)] [Also in Group XI] An iron is provided with a pivotally-mounted member 22 for supporting the iron out of contact with the work at an inclination to the member, the necessary angular movement between the iron and member 22 to cause the latter to take up its supporting position being provided by the operator exerting pressure on a support-operating member 23 at the rear of the sole plate. The member 22 consists of a pair of arms which extend on opposite sides of the sole plate and are accommodated in recesses in the latter when the iron is in use. The operating member 23 extends rearwardly of the arms 22 and is provided with two upstanding arms 24 which pivot on a rod 19 carried by a pair of brackets 17 formed on a support 12 mounted on the clamp plate 3 of the heating element 2. The upper ends of the arms 24 are provided with slots 25 forming guides for a cam follower 26 in the form of a rod which is urged by springs 27 into contact with cam surfaces on the upper edges of the brackets 17. When the iron is to be supported out of contact with the work, it is moved angularly so as to press the member 23 against the work, thus causing the cam surfaces on the brackets 17 to move relatively to the follower 26 and tension the springs 17 ; after the follower has passed the crest 20 of the cam surfaces, it drops into the dwell portion 21 and is held therein by the springs 27, with the sole plate out of contact with the work. Downward pressure on the iron then causes the follower 26 to move to its original position, and the arms 22 are again accommodated in the recesses in the sole plate. Current is supplied to the iron from a cable 29 through a rotatable connector 30 (see Group XI) which may be rotated so as to permit the cable to enter the iron from either side. The hollow body 5 of the iron, which is moulded with the handle 6 from thermo-plastic material, is secured to the clamp plate 3 by screws 7, the heads of which are contained in recesses 8 closed by plates 9 in the body. The Provisional Specification describes also the support as being in the form of a single arm, and the use of frictional means at the pivot of the support, instead of springs, for maintaining it in its angularly-adjusted position.
Patent GB-630767-A (GB)
Title: Three-phase electrode system for electric furnaces
IPC: H05B3/00
Filed: 1947-08-15
Abstract: 630,767. Electrode furnaces. NORSK HYDRO-ELEKTRISK KVAEL-STOFAKTIESELSKAB. Aug. 15, 1947, No. 22788. Convention date, March 15, 1943. [Class 39(iii)] A three phase electrode system for electric furnaces wherein the charge forms the heating resistance, comprises two sets of three-phase electrodes a, b, c and d, e, f located in separate horizontal planes the two sets of electrodes being so vertically and angularly displaced with regard to each other that the distance between the individual electrodes in each set is approximately equal to the distance from each electrode in one set to the nearest electrode of different phase in the other set. Figs. 3 and 5 are diagrammatical cylindrical sections and Figs. 4 and 6 the respective cross-sectional views of such electrode arrangements. The resulting current paths are represented by the dotted lines.
Patent GB-494615-A (GB)
Title: Improvements in or relating to wheels with detachable rims for automobiles and the like
IPC: B60B25/04
Filed: 1937-08-19
Abstract: 494,615. Vehicle wheels. ZIPPER, E. Aug. 19, 1937, No. 22797. Convention date, Aug. 19, 1936. [Class 144 (ii)] A detachable rim device of the kind described in Specification 406,867, in which the tyre-carrying rim is in axially-separable parts clamped between a fixed wheel-flange &c. and a split locking-ring, is provided with means for preventing relative axial displacement of the rim-parts by the inflated tyre on release of the means by which these parts are locked together when detached from the wheel. In the construction shown, the tyre-carrying rim comprises a split flange 12 normally expanded into locking-engagement with a continuous main portion 11 by means of a toggle 18 engaging lugs 19 near the ends of the flange. The rim is secured between fixed abutment 14 on the ends of the spokes 10 and a split ring 25 adapted to be jammed between coned seatings 27, 32 on the rim-part 12 and the spoke-ends respectively. After assembly of the rim and locking-ring, and before release of the toggle 18, the locking-ring is forcibly expanded against the rim-seat 27 by means of a cam-disc 35, constituting a rotary wedge, which is moved by means of the bolt 39 into the gap 15 between the ends 251, 25<2> of the rim-flange 12.
Patent GB-337366-A (GB)
Title: Process for the manufacture of cellulose fatty acid esters
IPC: C08B3/00
Filed: 1929-07-25
Abstract: 337,366. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). July 25, 1929. Cellulose acetates, aceto-propionates, acetobutyrates, &c.-Fatty acid esters of cellulose are produced by carrying out the esterification in the presence of methylene or ethylene chlorides as solvent instead of free acid. By effecting the reaction at temperatures of 20-60‹ C., degradation of the cellulose is avoided and clear solutions of unusual homogeneity and viscosity are obtained which may be spun directly or may be hydrolyzed, e.g. to give acetone solubility. The primary or secondary esters may be precipitated with aqueous or other liquids. The methylene or ethylene chlorides are recovered from the solutions or the precipitated ester by distillation and are returned to the cycle of manufacture. By the use of methylene or ethylene chloride, the quantity of catalyst may be reduced, e.g., 0.5 per cent of sulphuric acid may be employed. The invention is applicable to acetates, propionates, butyrates and mixed esters. Examples are given of the production of acetates from cotton wool and linters by the use of acetate anhydride, methylene or ethylene chloride, and a small quantity of sulphuric acid or sodium bisulphide ; and of aceto-propionates and aceto-butyrates, using acetic anhydride with propionic or butyric acid. Hydrolysis of the primary acetate is effected by addition of 50 per cent of acetic acid and sulphuric acid or of water and hydrochloric or sulphuric acid to give a acetone-soluble acetates which are precipitated with water, washed and dried. When precipitating by the use of non-aqueous liquids, e.g. benzene, the mixture of liquids is worked up by fractional distillation and acetic acid is obtained in concentrated form.
Patent GB-920987-A (GB)
Title: A process for the production of nitriles
IPC: C07B/
Filed: 1960-06-30
Abstract: Nitriles are prepared by reacting an aldehyde, or an alcohol containing one or more -CH2OH groups capable of being oxidised to an aldehyde group during the reaction, in a liquid alkaline medium with ammonia in the presence of oxygen or a molecular oxygencontaining gas and a copper compound as catalyst. Cupric chloride, bromide, acetate, nitrate, sulphate, oxide and hydroxide are suitable copper compounds. Temperatures may range from 0 DEG  to 100 DEG C.  The process may be used for the preparation of benzonitrile from benzaldehyde; 2,6-dichlorobenzonitrile from 2,6-dichlorobenzaldehyde; 2,6-dibromobenzo-nitrile from 2,6-dibromobenzaldehyde; 2-bromo-6-chlorobenzonitrile from 2-bromo-6-chlorobenzaldehyde; para-methoxybenzonitrile from anisaldehyde; 3,4-methylenedioxybenzonitrile from piperonal; oenanthonitrile from oenanthaldehyde; benzonitrile from benzyl alcohol; 2,6-dichlorobenzonitrile from 2,6-dichlorobenzyl alcohol, ortho- and meta-nitro-benzonitrile from ortho- and meta-nitro-benzaldehyde and 2-cyanofuran from furfural. Specification 700,184 is referred to.
Patent GB-221949-A (GB)
Title: Improvements in and relating to head telephone sets
IPC: H04M1/05
Filed: 1923-09-12
Abstract: 221,949. British Thomson-Houston Co., Ltd., and Stace, A. T. Sept. 12, 1923. Head sets. -- The receivers of a headtelephone are supported by a double spring-wire 11 or its equivalent, and the ends of the wires are formed into loops each of which is adapted to hook on to an ear. The double - spring wire 11 may pass under the chin with a wide clearance, and may be a continuous wire bent into the required form. The two wires may be connected together at convenient points, and may form a loop 21 for the passage of the telephone leads. The ends of the loops for the ears are bent inwards as at 14 and arched upwardly as at 15, and the arch 15 may be covered with soft material 22. Each receiver is mounted for rotational movement about pins 17 carried on adjustable sleeves 18. Rotation beyond a limit may be prevented by securing the telephone leads to the support, or by means of a washer secured to the receiver and engaging the sleeve 18 or a washer thereon.
Patent GB-501254-A (GB)
Title: Improvements in or relating to modulated carrier wave receivers
IPC: H03D3/16
Filed: 1938-08-03
Abstract: 501,254. Phase modalation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 3, 1938, No 23003. Convention date, Sept. 22,1937. [Class 40 (v)] A phase modulated carrier receiver comprises two filters, each adapted to convert phase into amplitude modulation and such that the converted wave envelopes are the opposite of one another, and means for additively combining the amplitude modulations corresponding to the original phase modulation. As shown, the circuit 10 feeds phase modulated energy to an over neutralized crystal filter comprising a centre tapped tuned circuit 12, 22 feeding the grids of valves 2, 3 through crystal 30 and " neutralizing " condenser 32 respectively, the outputs of valves 2, 3 being fed in parallel through a tuned coupling 44 to diode detector 50 with load resistance 63, across which the modulation frequencies appear. A further diode 60 with load resistance 61 is fed direct from the unneutralized crystal 30 through valve 1 and tuned coupling 58. The added outputs across load resistances 61, 63 feed a low-frequency amplifier and reproducer and also serve to correct the frequency of a local oscillator which beats with the incoming signals to produce the intermediate frequency supplied to the input circuit 10. In order to use the receiver for amplitude modulated waves, the output of valve 1, which comprises phase modulated waves produced from the amplitude modulated waves by the crystal 30, is fed to a further crystal 64 which reconverts it to amplitude modulated carrier which is applied to a further detector diode 66. In a modification, Fig. 3 (not shown), the upper demodulation channel 30, 1, 60 is replaced by a twovalve arrangement connected to the input circuit to give an under-neutralized crystal filter circuit. The complete receiver described incorporates switching to change over the receiver for reception of phase or amplitude modulated carrier and to cut out the automatic frequency control.
Patent GB-279989-A (GB)
Title: Improvements in and connected with fire grates and fire places
IPC: F24B1/193
Filed: 1926-09-18
Abstract: 279,989. Holt, J. M. Sept. 18, 1926. Grates for coke, anhydrous coal, and like fuels, of the kind in which air is supplied to the sides, and in some case the rear face, through conduits which are closed at the top, are made with the front, sides, and bottom, of grid form, the area of the air spaces being greater than half the complete area of the front, etc.; the whole front of the grate is exposed to the room; and the side air conduits are open at the front. The form shown comprises a basket-like grate having air conduits 8, 9 formed between its sides and back and the walls of the fireplace in which it is situated, and from which it is spaced by projecting members 15. The tops of the conduits 8, 9 are closed, or substantially closed, by a plate 10 integral with, secured to, or resting upon the grate. The rectangular grids forming the grate are composed of bars of triangular section, those at the bottom having grooves 4<x> in the upper surface to retain a protective layer of ashes. In the modification shown in Fig. 4, the air conduits 8, 9 are closed at the top by an overhanging formation of the brickwork 5<x>. A further modification consists in arranging the top portion 17 of the grate, above the tops of the air conduits. or alternatively in closing it for several inches downwards, with the object of ensuring that the air shall pass into the fuel when the latter has burnt down. Some or all of the side, back, and front bars may be hollow for heating water.