baber/WOPTO huggingface dataset:
Patent GB-670184-A (GB)
Title: Method of extracting nickel values from nickeliferous sulphide material
IPC: C01G53/00
Filed: 1949-03-28
Abstract: Pulverulent nickel sulphide ores, concentrates or makes are treated with strong aqueous ammonia, substantially free from ammonium carbonate, e.g. at 80-180 DEG F., in the presence of oxygen, air or mixtures thereof, and the nickel content of the solution is then separated.  Thus, the raw material is ground in an atmosphere of oxygen and in the presence of say 28 per cent ammonia solution, and then leached at 30 p.s.i. by a three-stage countercurrent process, ammonia being supplied to the second and last tank.  Agitation is effected by the oxygen &c. admitted.  The solution produced is filtered from the tailings, from which sulphur may be recovered by flotation, and boiled to liberate ammonia.  Nickel is then suitably separated as nickel ammonium sulphate by the addition of sulphuric acid to produce a pH of 6. The double sulphate is washed with acidulated ammonium sulphate to recover copper, and heated progressively up to 1,650 DEG F. to produce the oxide.  Nickel sulphate is formed as an intermediate product. The filtrate and washings are heated to 170-200 DEG F. to precipitate copper sulphide; the filtrate from this step is then heated to 200 DEG F. to drive off sulphur dioxide, and sulphur is removed by filtration.  The filtrate, containing cobalt sulphate and ammonium bisulphate is treated with calcium carbonate, and maybe oxide, calcium sulphate is filtered off, and nickel sulphide precipitated by the addition of calcium sulphide and preferably also ammonium persulphate.  Ammonia may be recovered by treatment of the filtrate with lime.  The calcium sulphide used may be regenerated from the precipitated calcium sulphate.  Sulphur, and sulphur dioxide and trioxide evolved in the process are converted to sulphuric acid for re-use.
Patent GB-788305-A (GB)
Title: Improvements in and relating to dry shavers
IPC: B26B19/04
Filed: 1955-03-23
Abstract: 788,305. Dry shavers. ARVIN ELECTRIC Ltd.. and COX. E. F. June 14, 1956 [March 23, 1955], No. 8465/55. Class 131 A dry shaver of the reciprocating cutter type has an outer perforated shear plate and an inner cutter made of a frame with transverse slots in which separatelyformed cutting blades are secured. The cutter 23 is forced against the shear-plate 24 by means of a spring 35 which also conveys the drive from the armature 15 to the cutter as described in Specification 788,304. The shear-plate is secured by rivets 36 to a cap 25 which is held on to the shaver casing by means of projections 25a and 25b. It is released by means of the button 27 which removes the springs 26 from the projection 25b. The cutter frame 30 is of sheet metal and bent to a trough section and the cutter plates 31 are set into slots formed in the base and side walls of the trough and are secured by a resin adhesive. The outer edges of all the plates are ground to similar circularly arcuate form. The edges of the cutter frame are bent inwards to form flanges 30a which are slidably engaged in guide grooves formed in the casing. The shear-plate is flexible and the cutter can be moved inwards as far as the guide grooves allow, against the action of the spring 35. A guard 33 is placed over the shear-plate when not in use, held in place by snapping over rivet 36.
Patent GB-1271482-A (GB)
Title: Process for increasing the dyestuff affinity of fibre materials of natural polyamides
Inventor: TAMER ERGUN
IPC: D06M15/59
Filed: 1970-02-23
Abstract: 1,271,482. Dyeing natural polyamides. FARBENFABRIKEN BAYER A.G. 23 Feb., 1970 [27 Feb., 1969], No. 8550/70. Heading D1B. [Also in Division C2] The anionic dyestuff affinity of fibre materials of natural polyamides is increased by treating in an aqueous bath containing a watersoluble polyamide obtained by reacting an aliphatic polyamine of formula I in which R and R, independantly of one another stand for hydrogen, a C 1  to C 5  alkyl group or a hydroxylalkyl group with I to 3 carbon atoms, X is a bivalent optionally substituted aliphatic radical with 1 to 6 carbon atoms and n is an integer 1 to 4 with an α,#-unsaturated aliphatic mono-carboxylic acid or with an aliphatic polycarboxylic acid which may contain a hetero atom or with a halide, amide, anhydride or ester. Mordant and acid dyes are used to dye the natural polyamides. The preferred polyamine used is bis-(3-amino-propyl-) methyl-amine and carboxylic acids used are acrylic acid, methacrylic acid, succinic acid, adipic acid, maleic acid and diglycollic acid.
Patent GB-780673-A (GB)
Title: Improvements in and relating to piezoelectric ceramic elements and transducers
Filed: 1955-03-24
Abstract: A piezo electric ceramic composition comprises a solid solution of lead zirconate and lead titanate.  Either the titanate or the zirconate may predominate but the titanate must never constitute less than 10 mole per cent of the composition.  The proportion of lead titanate is preferably the maximum that will yield a ceramic composed of rhombohedial crystals at room temperature, this proportion being about 45 mole per cent.  Piezo electric elements may be made by heating together in an atmosphere of lead oxide a compressed composition of PbO, ZrO2 and TiO2.  The temperature is raised at the rate of 4,5 DEG C. per min. until 1220 DEG C. is reached at which point the composition is heated for 30 mins.
Patent GB-827185-A (GB)
Title: Improvements in or relating to tractor and single-axle trailer combination vehicles
IPC: B62D53/08
Filed: 1956-03-20
Abstract: 827,185. Couplings for vehicles. HARKORT, W. March 20, 1956, No. 8590/56. Class 103(5) A semi-trailer 4 is connected to a tractor 1 by means of a tow bar 3 and by means of an intermediate bearer 8 which has a pivotal connection 7 with the main bearer 6. The rear end of the intermediate bearer 8 is guided by an arcuate rail 12 and side guides 11 engaging the bearer 8 constrain the trailer to move around the vertical axis through the pivot 7 and the joint 2.
Patent GB-416680-A (GB)
Title: Improvements in chains for conveying powdered or granulated substances
IPC: F16G13/07
Filed: 1933-03-22
Abstract: 416,680. Driving-chains. HOWARTH, H. W., 131, Horton Grange Road, and WALTER, R., 48, Spencer Road, Lidget Green, both in Bradford. March 22, 1933, No. 8607. [Class 24.] Chains for conveying powdered or granulated substances comprise links, each consisting of a cross-bar c integral with side-bars b, the ends of which have members 3 projecting inwardly to engage members a projecting from the crossbar of an adjacent link. The members a are in the form of hooks, each having a flared slot 2 leading to a circular aperture 4. Engagement of adjacent links can take place when they are positioned substantially at right angles to each other and one link is then slid laterally into engagement with the other. Projections 5 on the members 3 prevent relative lateral movement when the links are in operative position. The lower edge c<1> of each cross-bar is adapted to be in contact with the surface over which the chains travel.
Patent GB-526498-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B19/04
Filed: 1939-03-17
Abstract: 526,498. Photographic roll-film cameras. LEITZ GES., E. March 17, 1939, No. 8623. Convention date, Aug. 19, 1938. [Class 98 (i)] In a rapid film-winding mechanism of a camera comprising a trigger-like hand-operated member which sets or loads a spring filmwinding device, a shutter-releasing member is operated by the trigger as the latter completes its return movement. The camera shown is provided with a rapid film winder of the spring- controlled band type, the band 10 being connected to a slider 9 operated by a trigger 9a and carrying a pin 11 engaging in a groove in a pivoted cam 14, which in the position shown prevents depression of the shutter-release 7. A removable cap 15 surrounding the release contains a sleeve 17 downwardly urged by a spring 16 and having an L-form groove 18 in which engages a pin 20 on the release stud 19, so that in the position of the parts shown the sleeve 17 and stud 19 are locked together, and the spring causes the stud to depress the shutter-release 7 when the latter is freed by the movement of the cam 17 on the return stroke of the slide 9. By turning the stud 19 to bring the pin 20 to the vertical part of the groove 18, the stud is freed from the sleeve 17, the shutter being then released by depression of the stud in the usual manner.
Patent GB-1510451-A (GB)
Title: Electric cookers
IPC: A47J37/06
Filed: 1977-03-01
Abstract: 1510451 Sandwich grills SCOVILL Mfg CO 1 March 1977 [5 April 1976] 08659/77 Heading A4D A cooker for hamburgers and sandwiches comprises (see also Fig. 2, not shown) a perforated griddle (50) removably mounted in a base pan 12, a cover 14 hinged to the base pan and a cooking plate 32 in the cover, the cooking plate having a rib 36 in which is an electric heating element 38, the griddle being reversible with dissimilar cooking surfaces 54, 56 for hamburgers and sandwiches respectively, the surfaces each being able to mate with the rib 36 to transfer heat from the cooking plate to the griddle. As shown, the plastics cover 14 is held to the base pan 12 by separable hinge parts 20, 24 and a bail lock 26. The metal cooking plate 32 is secured in the cover 14 and carries a thermostat 44 for the heating element 38. The griddle has a surface 54 defined by a circular rib 60 to receive the hamburger and a surface 56 defined by a square or rectangular rib 62 to receive the sandwich, peripheral grooves 66, 68 in the cooking surfaces of the griddle receiving the rib 36.
Patent GB-789048-A (GB)
Title: Improvements in and relating to the art of powder metallurgy
IPC: B22F9/00
Filed: 1956-03-20
Abstract: Porous iron powders (e.g. sponge iron) are partially oxidized to give 8-29 per cent weight gain, mixed with alloying metals and if desired carbon, comminuted and reduced to iron base powder which is then pressed and sintered.  After reduction, non-hydrogen reducible alloying elements can be added together with lubricant if desired. The oxidation is carried out with a weight gain preferably of 11-18 per cent at 300-1000 DEG C. (preferably 700 DEG C.) for 20 minutes. The comminution step is performed to give a particle size of 2-4 microns and the reduced mixture pulverized to 4-10 microns (preferably 5-7).  The following are added at the ball milling (comminuting) stage: - Ni, Cu, W, Mo (either as metals or oxides) or C as calcined coke or graphite.  Reduction takes place in stainless steel trays with a counter current of H or cracked NH3 at 700 DEG -1000 DEG C. (preferably 975\sB10 DEG C.). After pulverizing, a blending step is carried out in which zinc stearate can be added as a pressing lubricant and the following ingredients also added:-Cr, Si/Fe, Fe/V or C (alternatively to the previous addition).  Pressing is by presses having both a top and bottom action.  Sintering is at 1200-1400 DEG C. for 1/2 -4 hours in a reducing atmosphere or a vacuum.  The following alloying ingredients are also disclosed Al, B, Co, Mn, Nb, Ta, Ti. Alloys in the following ranges are disclosed:-Ni 0.5 per cent, Cu 6.5 per cent, Fe balance.  Ni 1 per cent, Cu 6.5 per cent, C 05-2 per cent Fe balance.  Ni 1 per cent, Mn 1 per cent, Fe balance.  Ni 5 per cent, Mn 1 per cent, C. 4-5 per cent, Fe balance.
Patent GB-1430232-A (GB)
Title: Flooring system
IPC: E04F15/024
Filed: 1972-02-25
Abstract: 1430232 False floors SIKORA Ltd 13 Feb 1973 [25 Feb 1972] 8754/72 Heading E1W A false floor panel comprises a closed frame formed by members 10 having an upright peripheral flange and an inwardly directed flange supporting a plate 13. An edging strip 16 is held in position around the edge of the panel by its engagement between the frame and the plate and extends above the upper edge of the upright flange. The frame may be of rolled steel and the inwardly directed flange may be nearer to one edge of the upright flange so that alternative thicknesses of plate 13 may be accommodated. Alternatively the frame may be formed of simple angle section bars with one flange adjacent the side edge of the plate. The plate 13 may be of wood particle board with a metal backing plate bonded to its lower surface and covered with carpet or plastics.
Patent GB-1068147-A (GB)
Title: 3,3',5,5'-tetranitrodiphenylsulfone and a depolarizing agent
IPC: C07C317/14
Filed: 1966-02-28
Abstract: The invention comprises the title compound (T) and a process for preparing it by nitrating 3,31-dinitrodiphenyl sulphone. T is stated to be reduced to the tetraamino analogue when used as depolarizer in a voltaic cell.
Patent GB-152581-A (GB)
Title: Improvements in vehicle tires
IPC: B60C9/16
Filed: 1920-03-25
Abstract: 152,581. Huth, P. March 25, 1920. Jackets and covers.-A tyre cover 1 is reinforced by overlapping metal plates 3 which are secured by rivets 5 to an insertion 4 of braided wire fabric, the edges of the latter being lapped around the retaining-wires 6.
Patent GB-164885-A (GB)
Title: Electric heaters
IPC: F24H3/04
Filed: 1920-03-25
Abstract: 164,885. Terry, A. March 25, 1920. Electric radiators.-A heater, Fig. 1, comprises outer and inner globular shells 1, 2 of very thin copper, brass, or other metal, spaced apart by members 7, the inner shell having a rolled edge 5 in which a heating element 3 and an insulating ring 10 are disposed. The heater is raised above the floor by legs 9. Air enters through the bottom of the inner casing 2 and leaves by perforations 8 in the outer casing. The inner casing contains a spreader 4 adjustable from outside. In a radiator, Fig. 4, outer and inner shells 11, 12, similar to those described above but each consisting of three globular sections, are supported by spacing members 13 within a casing 14 to the top and bottom of which circulating pipes 21 are connected. Heating-elements S are disposed round each constriction of the inner shell. An adjustable spreader 4 is provided in each globe. Circulation is assisted by a fan 15 driven by a motor 18. There may be three sets of pipes 21 connected by transverse pipes 20. An equalizing valve mounted between a pair of springs in a casing 47 is provided. In a modification the circulating system consists of a single spiral pipe conneted to the top and bottom of the casing. In another modification the shells each consist of two globular sections, the casing follows the outline of the shell, and vertical circulating pipes are arranged concentrically around the casing. In another modification two heaters similar to that shown in Fig. 1 are arranged side by side in a horizontal casing above which the circulating pipes are mounted; in this form the outer globular shell has a single large opening at the top.
Patent GB-883645-A (GB)
Title: Pneumatic tire
IPC: B60C9/18
Filed: 1960-03-04
Abstract: 883,645. Pneumatic tyres. GOODYEAR TIRE & RUBBER CO. March 14, 1960 [May 12, 1959], No. 8848/60. Class 144 (2). In a pneumatic tyre having at least one breaker ply 13 or 14, the carcase is reinforced by a layer of parallel radial cords, i.e. cords subtending an angle in the range 80 to 90 degrees to the mid-circumferential plane, said layer extending from bead to bead to form an inner ply 7 and having its ends wrapped around the bead cores 6 to abut or overlap beneath the breaker ply and thereby form an outer ply 10, the two plies encasing an inner apex strip 8 located above each bead core 6, and an outer apex strip 28 being located externally of ply 10 in the rim-flange engaging region of tyre sidewalls to extend radially outwardly beyond the inner apex strip 8. The apex strips serve to reduce localised flexure at the bead regions, the outer strip being of a rubber of greater hardness than that of the sidewall rubber 31. In the flex area F of the tyre sidewalls, the cords of the plies 7, 10 are contiguous, and with a truly radial disposition tend to intermesh. In the crown region of the tyre the plies 7, 10 are separated by a cushion layer 9 of rubber softer than that of the sidewall rubber 31, the layer 9 being thickest in cross-section at each shoulder region 20, 21 and tapering therefrom towards its edges 15, 17 and towards its crown centre portion 22. The carcass cords may be of metal wire and the breaker may comprise two plies 13, 14 providing a rigid or " belted " tread reinforcement. Specification 628,060 is referred to.
Patent GB-271604-A (GB)
Title: Improvements in or relating to telephonic instruments
IPC: H04R9/02
Filed: 1926-04-01
Abstract: 271,604. Rickets, W. J. April 1, 1926. Diaphragms; magnetic instruments; loudspeakers.-A large diaphragm 1 is supported by resilient ligaments 2, 4 extending in radial parallel planes from the periphery and an axially extended region on the surface and provided on the peripheral portion with electromagnetic driving means in the case of a receiver or generating means in the case of a transmitter. Fig. 2 shows a coil 8 co-operating with an annular magnetic system 9 carrying a magnetizing winding 10. To prevent interference between the two sides of the diaphragm a baffle 12 or an annular flange 12<a> may be provided. In a modification, Fig. 4, an annular flange 7<a> of magnetic material is provided on the diaphragm periphery and co-operates with a number of electromagnetic systems. Each electromagnetic system comprises a permanent magnet 14 or an electromagnet provided with a polepiece 14<a> adjacent the peripheral edge of the flange 7<a> and pole-pieces 14b, 14<c> carrying telephonic windings 8<a>, 8b. Alternatively a bi-pole magnetic system may be disposed on one side of the flange 7<a> and operate against spring means acting either at the periphery or the apex of the diaphragm 1. Specificaticn 271,976 is referred to.
Patent GB-287577-A (GB)
Title: Improved process for the treatment of gaseous mixtures containing hydrogen
IPC: C01B3/58
Filed: 1928-03-23
Abstract: 287,577. Soc. l'Air Liquide, Soc. Anon. pour l'Etude et l'Exploitation des ProcÚdÚs G. Claude. March 25, 1927, [Convention date]. Materials for purifying.-Gaseous mixtures containing hydrogen are passed over reduced metals such as iron and copper at a temperature of 10-40‹ C. for the purpose of removing: nitrogen oxides prior to liquefaction.
Patent GB-863128-A (GB)
Title: Improvements in or relating to fault indicating arrangements for electric circuits
Inventor: HERWALD NEHEMIAH
IPC: H02H3/04
Filed: 1958-03-20
Abstract: 863,128. Protective arrangements. GENERAL ELECTRIC CO. Ltd. March 19, 1959 [March 20, 1958], No. 9032/58. Class 38 (5). To indicate the rupture of a fuse 8 in any of a plurality of circuit elements connected in parallel or in different phases of a polyphase supply, a single alarm or indicating circuit is connected between a common point and currentresponsive devices, each connected in parallel with an associated fuse and operative to complete the alarm or indicator circuit on the rupture of the fuse. Each device comprises a light current fuse 9 which on rupture causes a flat spring 10 to contact an alarm bar 11. Fig. 1 shows an arrangement in which a load 15 is supplied through semi-conductor rectifiers 1 and fuses 8 from a transformer having a starconnected secondary winding 2. The alarm circuit, comprising a relay 12 and a battery 13, is connected between the star point and the current responsive devices. Resistors 14 are provided to limit the alternating current should two fuses in different phases blow simultaneously. Fig. 2 (not shown) illustrates the invention applied to a three-phase full-wave rectifier system. In each case the common point may be formed by an artificial resistance neutral point of the transformer secondary winding is delta-connected, Fig. 3 (not shown). In a bi-phase rectifier arrangement the common point would be the centre tapping of the secondary winding of the supply transformer, Fig. 4 (not shown).
Patent GB-462454-A (GB)
Title: Improvements in or relating to radio wave signalling systems
IPC: H04B1/50
Filed: 1935-06-04
Abstract: 462,454. Wireless signalling. WALLACE & TIERNAN PRODUCTS, Inc. June 4, 1935, No. 9037/36. Convention date, June 11, 1934. Divided out of 459,235. [Class 40 (v)] A radio receiving system comprises a superregenerative receiving apparatus, a relay and means responsive to " rushcurrents " (i.e. beats between the quenching frequency oscillator and the detector) in the output of the apparatus which normally energizes the relay, the latter being de-energized upon absence of the rush-currents. The invention is described as applied to a two - way radio - telephone system using a super-regenerative receiver in which the "rush " currents energize a relay to open the supervisory alarm circuit when the receiver is operative ; if a carrier of suitable frequency is received, the alarm circuit is closed. In the system shown, a motor 33 causes a cam 34 to close periodically at contact 38 a circuit for relay 24, thereby periodically closing the filament circuits of the valves 26, 106, 109, 114 to make the receiver operative. The so-called " rush " currents (due to beats between the currents produced by the quenching oscillator 109 and the detector-oscillator 106) are amplified by valve 114 and cause valve 26 to energize a relay 40, thereby causing relay 27 to open the circuit of the bell 28 which would otherwise be closed over contact 32<1> of relay 27 and contact 42 operated by the cam 34. The relay 27 also maintains the motor circuit closed at contact 37<1>, so that the valve circuits are periodically energized. When carrier of appropriate frequency is received from a calling station at aerial 120, the " rush " currents are suppressed or weakened, de-energizing relays 40, 27 to ring the call bell and stop the motor 33. The removal of the telephone 53 from hook 30 disconnects the bell and relay 27 and energizes the transmitting-equipment 100, the system then operating, as described in Specification 459,235. Specifications 418,525 ; 409,481, [Group XXXV], and 462,455 are referred to. The Specification as open to inspection under Sect. 91 also states that if a circuit component fails, the " rush currents cease, thereby operating the alarm. This subject-matter does not appear in the Specification as accepted.