baber/WOPTO huggingface dataset:
Patent GB-266040-A (GB)
Title: Improvements relating to the extraction of precious metals from their ores and concentrates
IPC: C22B11/00
Filed: 1925-11-14
Abstract: 266,040. Mond Nickel Co., Ltd., and Atkinson, R. H. Nov. 14, 1925. Dry processes of extracting platinum group metals; desilverizing; alloys; treating ores to remove undesired constituents.-In a process for separating gold, silver and the metals of the platinum group from their ores, the finely crushed ore or concentrate is heated with lead and zinc to a temperature above the melting point of the zinc but below the sintering point of the ore. The process is carried out in a reducing or neutral atmosphere and ammonium chloride, or a mixture of chlorides, is added as a flux. Where sulphur is present in the ore, a preliminary roasting is preferably given. The beads of lead and zinc containing the precious metals are separated from the residue and are melted with more zinc or a zinc alloy e.g. an aluminium alloy, in a manner similar to Parkes' process for desilverizing lead. Should the original ore contain iron, the residue, after removal of the metal beads, is treated magnetically, the magnetic constituent being found to contain the major portion of the residual precious metals. In an example of the treatment of a concentrate of an ore containing gold and the metals of the platinum group, 70 parts by weight of the ore are mixed with 40 of lead, 1 of zinc, 1 of ammonium chloride, and 0.5 of charcoal. The mixture is heated at about 600‹ C. in a rotating tube furnace for about 16 hours. The metal beads, consisting mainly of lead, are separated by screening or washing and the residue magnetically treated. The strongly magnetic portion containing iron and platinum is treated for the separation of the platinum by any known method. The remainder of the residue is mixed with 30 parts by weight of lead, 1 of zinc, 1 of ammonium chloride and 0.5 of charcoal and the resultant beads separated. In an example of the treatment of the beads which in this case also contain silver, to 391 parts of the molten metal are added 90 parts of zinc, the surface being covered with charcoal. The mixture is maintained above the melting point of zinc at a maximum temperature of 500‹ C., being stirred every 15 minutes. On cooling, the zinc separates as a crust between 400‹ and 385‹ C. and at 350‹ C. the molten lead is run out, almost the whole of the precious metals being contained in the zinc. The lead is used for further separation.
Patent GB-1237244-A (GB)
Title: Powdered metal article
Inventor: STEVEN GARY
IPC: C22C38/24
Filed: 1968-06-17
Abstract: 1,237,244. Powdered metal bodies. CRUCIBLE Inc. June 17, 1968 [Sept. 11, 1967], No.28840/68. Heading C7A. A metal body is composed of compacted particles of a high speed tool or die steel composition containing a metal, variety Ti, V, Mo, Zr, Nb, Ta or W, which is reacted with C, O or N to form carbides, oxides or nitrides, respectively, which are evenly distributed throughout each particle, the body having a hardness of at least 58Rc. High speed tool steels are defined to have the composition :- Co 0-12% Mn up to 2% Si up to 1% S up to 0À5% Fe and impurities-balance Die steels are defined to have the composition:- The carbide, oxide or nitride may be produced in the particles by (a) being present in the melt from which the particles are made, or (b) making the particles containing the metal in pure form and then reacting with the C, O or N with subsequent diffusion of the resulting compound throughout the particles. Compacting is effected by heating a container of powder (preferably of minus 30 standard mesh size or finer) and then compressing in a die or autoclave. The hardness of at least 58Rc is produced by austenitizing, quenching and tempering. The evenly dispersed carbide, oxide or nitride leads to the substantial absence of outof-roundness of the body after hardening. The bodies therefore useful as dies and tools, e.g. cutting tools such as hobs.
Patent GB-777264-A (GB)
Title: Improvements relating to hand tools for use in the removal of plant life from soft ground
IPC: A01B1/18
Filed: 1954-10-07
Abstract: 777,264. Weed extractors. SMALLWOOD, H. W. July 18, 1955 [Oct. 7, 1954], No. 28855/54. Class 6(2). A hand tool for removing weeds comprises a pair of levers 1, 2 pivoted about a common point 3 like a pair of scissors and provided with plates 9 the blunt ends 6 of which are capable of gripping a weed, the opposite end of the levers being provided with handles 4.
Patent GB-810937-A (GB)
Title: Improvements in or relating to machines for securing hooked belt-fasteners
Inventor: POTTER JOHN JAMES
IPC: F16G3/00
Filed: 1956-09-21
Abstract: 810,937. Belt-fastening appliances. HAY DEN-NILOS Ltd. March 12, 1957 [Sept. 21, 1956], No. 28871/56. Class 80 (1). In a machine for pressing fastening hooks 24 from a comb bar 20 into a belt 29 by means of a jaw unit 2 slidable along the bar 20, a pawl 19  protruding through a slot in the bar 20 is urged into successive engagement with the bases of the unpressed hooks 24 each time the jaws are fully opened so as to step the jaw unit along the comb bar, the unpressed hooks in the comb bar thus acting as a toothed rack. The pawl 19 is carried by a spring-loaded lever 18 actuated by a protruding pivot in the toggle linkage between the jaws 2 and their operating handles, as described in Specification 810,933. The hooks 24 are retained in the comb 20 by a securing rod which also retains a belt clamp as shown in Specification 810,935. It is stated that the fastening hooks may be of the individual twopointed type or may comprise single-pointed hooks connected by a bridge-piece which is engaged by the point after passing through the belt. Specifications 810,934 and 810,936 also are referred to.
Patent GB-856555-A (GB)
Title: Multi-purpose shoe manufacturing machine
Inventor: KREMEL VICTOR
IPC: A43D25/06
Filed: 1957-09-13
Abstract: 856,555. Shoe bottom presses. SVIT NARODNI PODNIK. Sept. 13, 1957, No. 28919/57. Class 17(1) In a sole-laying and shoe-pressing machine with a plurality of working posts, when a gripping bow 8 is swung outwards about a pivot 7, a shoe B may be introduced laterally into a pressing cushion housing 6. Air or hydraulic pressure in a cylinder 28 causes a lever 25 to push gripping the bow 8 into operative position where it is held by a pawl 27 which engages teeth on an end 17 of the bow. A drum carrying the working posts now rotates and a cam face on a switch 33 trips the pawl 27 and disengages it from the toothed end 17 allowing the bow 8 to be pivoted anticlockwise about the pivot 7 by a spring 39 and the lever 25 to be pushed to the left. This movement lifts members 14, 15, 19 and allows the shoe to be removed.
Patent GB-1191854-A (GB)
Title: Production of Ketones
Inventor: YOUNG HOWARD SETH
IPC: C07C45/48
Filed: 1967-06-23
Abstract: 1,191,854. Catalyst compositions. EASTMAN KODAK CO. 23 June, 1967 [27 June, 1966], No. 29009/67. Heading B1E. [Also in Divisions C1 and C2] A catalyst composition, for use in the production of a ketone or a mixture of ketones from a gaseous or vaporous mixture containing a saturated aliphatic monocarboxylic acid and at least one saturated aliphatic aldehyde, comprises an oxide of thorium supported on a carrier material, for example activated alumina in for example the gamma, eta, chi, kappa or theta form. The composition has a content of oxide of thorium preferably of from I to 25, advantageously of from 10 to 20, weight per cent; the oxide of thorium may be the result of the action of heat on at least one thorium salt, for example the carbonate, nitrate acetate, oxalate or isobutyrate. According to Example 1, a composition having a calculated thorium dioxide (ThO 2 ) content of 10 weight per cent is prepared by dissolving 95.5 g. thorium nitrate tetrahydrate in 150 ml. distilled water, adding the resulting solution to 423.8 g. activated gamma alumina tablets having a surface area of from 80 to 100 square metres per gram and a pore volume of from 0.28 to 0.33 cubic centimetres per gram, allowing the resulting mixture to soak for one hour with stirring, heating the resulting impregnated tablets to 110‹C with stirring, and calcining the resulting heated and impregnated tablets in a muffle furnace initially for 2 hours at 300‹C and thereafter for 3 hours at 500‹C. The tablets may be # inch in size.
Patent GB-458832-A (GB)
Title: Improvements in materials for self lubricating bearings
IPC: F16C33/12
Filed: 1935-10-21
Abstract: The invention described in parent Specification is modified by employing a powder consisting for the greater part of wrought iron particles, or a mixture thereof with copper particles.  The constituents may be in the proportion of 65 per cent iron and 35 per cent copper.  A small proportion of tin, lead, zinc, or other metal of low melting-point may be added.  When these metals are used the wrought iron and copper particles are preferably coated therewith before the pressing and sintering operations.
Patent GB-1284310-A (GB)
Title: Improvements relating to fluid pumping systems
IPC: F16H61/4096
Filed: 1970-06-16
Abstract: 1284310 Reciprocating pumps TASK CORP 16 June 1970 [25 June 1969] 29053/70 Heading F1A A pump 13 has a by-pass 40, 40a controlled by a valve 41 controlled by the pump swash-plate 31 so that as the swash-plate is moved to reduce the pump output, the by-pass is opened, and vice versa. The pump casing interior 55 has a drain connection 54 leading to the pump inlet 17. A pressure-relief valve 60 connects the by-pass line line to casing interior 55, e. g. when a filter in the by-pass line becomes blocked. The swashplate is adjusted by a manual or other control 44 acting on by-pass valve extension 37, discharge pressure in passage 47 also acting on extension 37 to at least partly counterbalance spring 35. When the discharge pressure rises above a predetermined level, it moves valve 70a, 70b downwardly and acts via passage 76 on by-pass valve piston 36a to reduce the swash-plate inclination. A flow restriction 53 is provided in the by-pass line 40. A system incorporating the pump, Fig. 3 (not shown), comprises fluid utilization equipment connected to the pump outlet. The equipment discharge and the by-pass line are connected through filters to a fluid supply reservoir.
Patent GB-1361513-A (GB)
Title: Absorption refrigerating apparatus
IPC: F25B15/10
Filed: 1972-06-21
Abstract: 1361513 Refrigerators ELECTROLUX Ltd 21 June 1972 [6 July 1971] 29076/72 Heading F4H In an absorption refrigerating apparatus of the kind which operates with an inert gas, refrigerant condensate from a condenser being supplied to an evaporator together with weak inert gas, the evaporator 33, Fig. 3, in the normal position is substantially horizontal and is connected at points 42, 43 at or near each end to supply conduits 38, 39, the conduits being so disposed that when the apparatus is tilted from the normal position, refrigerant condensate is supplied to the evaporator at the higher end. Each supply conduit has a high part 44, 45 which rises when the apparatus is tilted to lower the corresponding connection 42, 43. Both supply conduits are fed from a single pipe 30 so that when the apparatus is tilted as shown in Fig. 3, the evaporator sloping down to the right, the high part 44 will be lower than high part 45 so that the condensate will run only to connection 42 and flow down the evaporator towards the bend 46. When the tilt is in the other direction (Fig. 4, not shown) the high part 45 will be lower and the flow will be to connection 43, the condensate running down towards the left. A pipe 47 is provided for taking it to the high temperature evaporator 34. In another form, Fig. 6, the condensate supply pipe 63 is cooled by contact with the high temperature evaporator 64 and connected to the middle of the evaporator 66. According to the direction of tilt the condensate flows down one or the other half 69, 70 and passes via pipes 72, 77 to the higher end of the evaporator 64, leaving eventually via pipes 75 or 81. Loop at the ends of the evaporator halves 69, 70 provide reservoirs of condensate which continues to evaporate when the tilt is changing.
Patent GB-946574-A (GB)
Title: Pile fabrics
Inventor: CHARBIN ROGER MARC
IPC: D03D27/10
Filed: 1960-08-23
Abstract: 946,574. Velvet. J. B. MARTIN CO. Inc. Aug. 23, 1960, No. 29107/60. Heading DIK. Velvet woven face-to-face has lashed pile disposed at two-pick intervals such as 60, 62, 64. The groups of three pile warp threads are separated by pairs of ground warp threads 51, 52 woven plain and interlacing oppositely to the adjacent pile threads; one of the two ground threads may be omitted.
Patent GB-1065572-A (GB)
Title: Machine for manufacturing wire netting with quadrilateral meshes
Inventor: DRESSLER GUENTHER
IPC: B21F27/00
Filed: 1964-07-15
Abstract: 1,065,572. Making chain-link wire netting. DRAHTWEBSTUHLBAU VEB. July 15, 1964, No. 29118/64. Heading B3E. A machine, for manufacturing wire netting with quadrilateral meshes of the kind wherein the netting leaving the tube in which flat wire helices are interlaced to form the netting is passed over two parallel spaced rollers between which bending over of the ends of the helices of the netting is effected, is characterized in that the second, in the direction of netting feed, of the two rollers is a feed roller which is driven through a slipping clutch. Netting 4 from an interlacing tube 1 passes over a guide roller 3, a feed roller 5, under a jockey roller 11 and on to a coiling drum 12. The ends of the wire helices which form the netting are bent over as the netting passes between the rollers 3, 5. The roller 5 is driven from a chain wheel 7 connected to the roller shaft by a spring-loaded slip clutch. The wheel 7 is driven through a chain 8 from a control shaft 10 which is rotated only as the ends of the wire helices are cut and the ends are bent over, so that the netting is maintained under tension during its passage between the rollers 3, 5 for the ends of the helices to be bent over. For mesh sizes less than a predetermined maximum the slipping clutch functions to absorb the difference in feed rate.
Patent GB-307486-A (GB)
Title: Improvements in or relating to wings or other supporting or control surfaces of aeroplanes
IPC: B64C3/14
Filed: 1928-10-10
Abstract: 307,486. Tellier, A., and Duhamel, R. March 10, 1928. Planes and the like, construction of.-Wings and auxiliary surfaces of aeroplanes such as the 'tail are formed of varying depth and thickness, with the dorsal and ventral surfaces developable in the direction of the depth of the wing but not parallel to one another. The edges of the crosssections of the wing &c. at 0, I - - - - X, Fig. 2, are parallel to the main profile, as shown in section in Fig. 3, and the section is bi-convex, the two generatrices of the dorsal and ventral surfaces forming angles, which may be constant or varying, and generate surfaces which may be cylindrical or conical.
Patent GB-974114-A (GB)
Title: Spectroscopic apparatus
IPC: G01J3/36
Filed: 1961-08-11
Abstract: 974,114. Spectroscopic apparatus. BAIRDATOMIC Inc. Aug. 11, 1961 [Oct. 20, 1960], No. 29168/61. Heading G1A. [Also in Divisions G2 and G3] By means of a semi-transparent semireflecting plate 16, Fig. 1, radiation from an arc 10 and a lamp 30 is directed through a first slit 18 and a rotatable deflecting plate 20 on to a concave diffraction grating 22. The spectrum of the arc formed thereby is directed to slits 24 so that radiation forming preselected spectral lines passes through the slits to photomultipliers 26, the relative intensities being registered by integrating and indicating circuits 28. A spectral line of the radiation from the lamp 30 is similarly directed to a second slit 34, which is disposed obliquely to the first slit 18, so that the balance of radiation passing therethrough to a pair of photomultipliers 36 and 38 is dependent on the image 44, Fig. 2, of the first slit relative to the second 34. The outputs of these two photomultipliers 36, 38, controls a servomotor 40 and thence a motor 42 controlling the rotation of the deflector plate 20 so as to maintain constant the alignment of the beams from the diffraction grating relative to the slit. The lamp 30 is energized with A.C. from a source 30 and one dynode of each of the photomultipliers 36, 38 is supplied with the same A.C.to gate them in anti-phase during alternate half cycles of the lamp supply. Specification 869,257 is referred to.
Patent GB-667986-A (GB)
Title: Improvements in or relating to a web severing device
IPC: B26D1/10
Filed: 1949-11-15
Abstract: 667,986. Cutting webs. ROLLINSON, E. W. (Collmar Corporation). Nov. 15, 1949, No. 29200/49. Class 31 (i). A web-holding and cutting device, for printing-presses and like machines in which a web travels over a predetermined path, is mounted along the path of travel of the web in a normally inoperative position in which it permits the web to move forward and has means responsive to deflection of part of the web from its path to actuate the device so as to cut the web and clamp the approach side thereof. The device has two members 12 and 22 between which the web passes, the member 22 being held apart from member 12 by means of a lug 31 engaging a pin 25, the lug being formed at the end of a lever 28 pivoted at 29 to the member 12. A solenoid 37, when energized, pulls down link 34 and pivots lever 28 so that lug 31 disengages pin 25 and link 19 snaps to the position shown in Fig. 2, under the force of spring 26, causing member 22 to clamp the web as shown in Fig. 6. The member 12 is provided with side-pieces 13 and 14, the piece 14 having a serrated upper edge so that upon operation of the device, the web on one side thereof will be severed. The solenoid 37 is operated by a switch 42, Fig. 6, controlled by a contacting element 41 which, upon breaking of the web, closes the switch.
Patent GB-1466256-A (GB)
Title: 2,5-substituted furans and their production
IPC: C07D307/46
Filed: 1973-06-20
Abstract: 1466256 2,5-Substituted furans GRINDSTEDVAERKET AS 19 June 1974 [20 June 1973] 29241/73 Heading C2C Novel compounds of the formula I wherein R<SP>1</SP> is C 1-4  alkyl or -(CH 2 ) 7 COOR in which R is hydrogen or C 1-4  alkyl; Z is either R<SP>4</SP> is hydroxy and R<SP>5</SP> is hydrogen or C 1-4  alkyl or R<SP>4</SP> and R<SP>5</SP> together are oxo and R<SP>6</SP> is C n H 2n+1  where n is 1 to 10 with the proviso that when R<SP>1</SP> is methyl and R<SP>4</SP> and R<SP>5</SP> together are oxo, Z is -CH=CH- but R<SP>6</SP> is not methyl, may be prepared by condensing an 5-R-substituted furfural with 2-oxo(C 3-12 ) alkane or R<SP>6</SP>COCH 3  or R<SP>6</SP>COCH 2 PO(OCH 3 ) 2  to yield a compound I in which R<SP>4</SP> and R5 together are oxo and Z is -CH=CH- optionally followed by one or more of (1) reduction of the double bond at Z, (2) reduction of the oxo group to CHOH, (3) reaction of the oxo group with a Grignard reagent R<SP>5</SP>MgX where X is halogen to form a group, (4) hydrolysis of an ester at ROOC- and (5) esterification of a free acid at ROOC-. Pharmaceutical compositions of the compounds I with the usual excipients control hormone production of corpus luteum.
Patent GB-846465-A (GB)
Title: Improvements in or relating to removable floor coverings such as artificial games courts and the like
IPC: E01C13/04
Filed: 1956-09-26
Abstract: 846,465. Portable floor for tennis &c. ATTEW, L. H. Sept. 26, 1957 [Sept. 26, 1956], No. 29456/56. Class 142(4). [Also in Group XV]  A removable floor covering is made in two or more portions of flexible material to be laid edge to edge, rigid members being provided on at least some of the edges having inter-engaging formations by which the abutting edges may be secured together. As shown fragmentarily, the two halves of a badminton court are joined in the region of the net by means of boards 1 provided on each half. The flexible material 2 consists of two layers 8, 9 permanently secured to the boards 1 by rivets 3. Each board has eyebolts 4 and recesses 5 which inter-engage with those of the other board, locking pins 6 being placed through apertures 7 in the boards to secure the eye-bolts. The under sides of the boards may be given a non-slip, non-abrasive surface and the ends of the covering may be carried over the boards to conceal them. Each board may be hinged at one or more joints and mounted on castors, rollers or gliders and may be reinforced internally or externally with metal. Cords for tying up the parts when rolled up and detachable handles for carrying them may be provided.
Patent GB-188937-A (GB)
Title: Improvements relating to lubricators
IPC: F16N7/00
Filed: 1921-11-05
Abstract: 188,937. Partridge, P. C., and Partridges', Ltd. Nov. 5, 1921. Hinges.-One or both of the lugs c by which a lid b of an oil cup is hinged on a pin d is formed with a resilient extension co-operating with the inner surface of the body, the friction serving to hold the lid in the required position.
Patent GB-1400601-A (GB)
Title: Metering pump
Inventor: SOMMER P
IPC: F16J15/3208
Filed: 1972-06-23
Abstract: 1400601 Reciprocating pumps F HOFFMAN-LA ROCHE & CO A G 23 June 1972 [6 July 1971] 29550/72 Heading F1A A pump for corrosive liquids, e.g. for analysis, comprises a block 1, e.g. of P.T.F.E., with a pumping piston 3, e.g. of glass, and a diaphragm 14, e.g. of P.T.F.E., controlling the connection of inlet and outlet ducts 7 and 12 to the pump cylinder duct 10, a rod 22 being secured to the diaphragm, e.g. by adhesive, to move the diaphragm into and out of sealing engagement with inlet duct opening 8 and a rod 26 effecting movement of the diaphragm in relation to delivery duct opening 11, both rods 22, 26 being actuated by cam surfaces on crank disc 20 which also drives piston 3 via guided rod 18. Rods 22, 26 are connected to levers 24, 27 spring-loaded against disc 20. A cup seal 4 is biased against piston 3 by O-rings 5 and is located in a chamber 32 through which cleaning water is circulated. In operation of the embodiment shown, a second piston 35, which may be omitted, Fig.1 (not shown), draws in a specimen liquid through pipette end 42a of spiral hose 42, and piston 3 draws in a flushing liquid. On the delivery stroke, piston 35 discharges the specimen through hose 42, and piston 3 discharges flushing liquid through cylinder 40 and hose 42.
Patent GB-1270288-A (GB)
Title: Header system for a semiconductor device
Inventor: REDWANZ JAMES OTTO
IPC: H01L21/60
Filed: 1969-06-11
Abstract: 1,270,288. Semi-conductor devices. TEXAS INSTRUMENTS Inc. 11 June, 1969 [25 June, 1968], No. 29558/69. Heading H1K. A header for a semi-conductor device includes a flexible sheet of insulating material bearing conductive tracks for connection to a semiconductor device contained within the header, the other ends of the tracks being connected to leads which extend from the header base. The header comprises a ceramic base 16 through which leads 20-23 protrude, a metal pad 24, connected to one of the leads, 20, to which pad the underside of a semi-conductor chip 13 is attached, the chip including contact pads 30- 32, and a flexible insulating sheet 34 bearing a plurality of tracks 36-38 on its underside, one end of the tracks being for attachment to the contact pads of the chip 13, the other ends of the tracks terminating in apertures 40-42 in the sheet for attachment to the ends of leads 21-23. The various contacts may be made using deposited solder films which melt on heating. A metal cap 15 may be welded to a flange 28 of the header to hermetically seal it. In an alternative construction, the sheet 34 may have no apertures and rest directly on the leads, the track ends being connected thereto. Alternatively the sheet 34 and chip 13 may together be inverted so that the chip lies, contacts downwards, on the track carrying insulating sheet. In this case the pad 24 may be dispensed with and in lieu a further contact made to the chip face. In another embodiment a plurality of chips may be used, the tracks including resistors and capacitors to form a large scale integrated circuit within the header. In a variation of the sheet structure, it may comprise a plurality of insulating sheets with conductive tracks therebetween, contact being made between tracks in adjoining layers by means of apertures in the intervening insulation.