baber/WOPTO huggingface dataset:
Patent GB-1524890-A (GB)
Title: Process for producing acrylonitrile polymer melt
IPC: C08F20/44
Filed: 1976-11-08
Abstract: 1524890 Media for the polymerization of acrylonitrile JAPAN EXLAN CO Ltd 8 Nov 1976 [7 Nov 1975] 46441/76 Heading C3P A mixture of acrylonitrile and a comonomer is polymerized at 80-120‹ C. under a pressure which is slightly less than self-generated in the presence of an organic solvent-free system in which water is present in an amount of 3 to 60% by wt. of the total amount of monomer and water, to a conversion of at least 45%. The resulting melt can be spun directly, or heat treated, or mixed with solvents for spinning.
Patent GB-1372795-A (GB)
Title: Multilayer printed circuit boards
IPC: H01R12/51
Filed: 1972-10-11
Abstract: 1372795 Printed circuits INTERNATIONAL BUSINESS MACHINES CORP 11 Oct 1972 [27 Dec 1971] 46740/72 Heading H1R A multilayer printed circuit board (Fig. 1) comprises layers 8, 9, 10, 11 each having epoxy insulator layers 12, 13, 14, 15 with conductive printed circuit patterns 16, 17, 18, 19; 20, 21; 22, 23 respectively imposed thereon and voltage planes (not shown) for ground and reference potentials. An insulant 25, e.g. GRP is interposed between the layers, and a through hole 4 traversing plural or all layers is internally plated with conductive material 6 to interconnect the upper and lower surface patterns. The hole is surrounded by larger concentric via holes 28, 29 traversing one or more layers also containing a through hole internally plated with conductive material at 26, 27 to interconnect the printed circuit patterns on opposite faces of respective layers with the GRP insulant 25 filling the voids between plating 26, 27 and plating 6. As shown, the latter contacts patterns 16 and 22, while patterns 17, 23 are separated therefrom by a GRP filled clearance, and the via holes are approximately twice the diameter of the through holes. In manufacture, the layers 8 to 11 are fabricated separately, via holes 28, 29 are formed in layers 9, 10 and plated at 26, 27. The layers are coated with GRP, aligned, stacked, compressed, and heated to cure and laminate, and the GRP extrudes into the via holes. Thereafter the through hole 4 is made and plated. A section on line 2-2 of Fig. 1 (Fig. 2) shows the periphery of a via hole at 28, with plated regions 30, 31, 32, 33 serving as four independent via connections, and the through hole plating 6 is insulated therefrom by extruded GRP 25. The regions 30, 31, 32, 33 respectively interconnect upper surface printed circuit leads 34, 36, 38, 40 to lower surface leads 35, 37, 39, 41. In a modification (Fig. 3, not shown) three layers of dielectric have printed circuitry on the upper and lower surfaces which are laminated and traversed throughout the combined thickness by a plated through hole, surrounded by a via hole traversing the three layers and interconnecting over plating the printed circuits on upper and lower surfaces of the lamination; the plating layers being mutually separated by clearance and insulated by extruded GRP. A larger via hole is plated to interconnect the printed circuit surfaces of an intermediate layer. In fabrication, the layers are formed separately and plated, coated with GRP and laminated with extrusion into the via holes. A smaller via hole is then formed and plated for contact between the outer surfaces, after which the layers are coated with GRP and laminated with other layers, and, the inner through hole is formed and plated; voids being filled with extruded GRP.
Patent GB-1277462-A (GB)
Title: The upgrading of chromite and other ferruginous materials
IPC: C21B15/00
Filed: 1969-09-24
Abstract: 1277462 Treating iron-bearing ores ANGLO AMERICAN CORP OF SOUTH AFRICA Ltd 24 Sept 1969 [26 Sept 1968] 47023/69 Headings C1A and C1N Iron bearing material, e.g. ores, containing metallic iron, or iron salts, are treated by mixing the material with a solution of an iron salt, and passing an oxygen containing gas through the mixture. The iron salt solution may contain a ferrous, or a ferric salt, but ferrous salts such as FeSO 4 , FeCl 2  are preferred. Suitable gases are air and oxygen. The treatment is preferably carried out at above 40 C. After carrying out the treatment, the solids, containing iron as iron hydrate are separated from the iron salt solution, which may be re-used, and subjected to a mechanical separation e.g. by means of hydrocyclones, flotation, tabling, elutriation, to remove the iron hydrate from the treated material. Materials suitable for this treatment include chromite, ilmenite and iron-bearing phosphate ores.
Patent GB-1523766-A (GB)
Title: Reactive power compensating arrangement
IPC: G05F1/70
Filed: 1975-11-14
Abstract: 1523766 Automatic control of power factor and current SIEMENS AG 14 Nov 1975 [18 Nov 1974] 47114/75 Heading G3R [Also in Division H2] The reactive power in an A.C. system is compensated by an arrangement comprising two A.C. to D.C. static converters having substantially equal no-load D.C. voltages, with their A.C. inputs connected to the system and their D.C. outputs connected in parallel and short-circuited through a choke coil, and control means producing firing pulses for the respective converters that are delayed for one converter, and advanced for the other, with respect to the input voltage to the converters, the control means also maintaining the choke coil current substantially constant by ensuring that, as the current tends to change, the firing pulse angles associated with the respective converters vary in opposite directions to one another. In a basic arrangement, Fig. 1 (not shown) the converters respectively have delayed and advanced firing angles of 90 degrees and carry currents iN1, iN2 which are equal in amplitude or different in one or other sense, thus providing a resultant input current iN lagging, in phase with, or leading the A.C. system voltage UN to produce a load which is inductive reactive, Fig. 2a (not shown), zero reactive, Fig. 2b (not shown) or capacitive reactive, Fig. 2c (not shown). The small size of the choke coil is discussed with respect to its A.C. component of current, (limited by the choice of the converter transformer) and to the use of either six-pulse or twelvepulse converters. In Fig. 3 converters 1a, 2a are connected to an A.C. system via transformer 4 and have respective regulators 1c comparing the signal from a reactive power senser 5 with a desired value, and 2c comparing the signal from a choke coil current senser 6 with a desired value, the regulator 1c controlling unit 1b to vary the firing angle of converter 1a to maintain a desired reactive power, and regulator 2c controlling unit 2b to vary the firing angle of converter 2a to maintain a desired choke coil current.
Patent GB-1484914-A (GB)
Title: Video signal reproducing device
IPC: H01J29/48
Filed: 1974-10-31
Abstract: 1484914 Cathode-ray tubes SONY CORP 31 Oct 1974 [21 Dec 1973 4 June 1974] 47246/74 Heading H1D [Also in Division H4] In a television tube having a gun which includes two tubular electrodes coaxially arranged in succession along the beam path, modulation of the line scanning velocity by a signal derived from the transient change in the brightness component of the video signalto sharpen the image at regions of rapid brightness change-is achieved by forming that one of the two electrodes that is at a relatively lower potential in two parts which are axially separated along a vertical plane that is inclined relative to the axis of the tube, the control signal being applied across the two parts. In the three gun shadow mask colour tube shown in Figs. 1 and 2, the centre electrode G 4  of the unipotential main focusing lens is divided into parts G 4A  and G 4B , the electrode potential Vf, Fig. 2, being applied to both parts, and the scanning velocity control signal E being applied between them. A similar arrangement is disclosed in a tube having a bipotential main focusing lens (Figs. 7 and 8, not shown), and in a monochrome tube. The control signal for the scanning velocity modulation is produced by applying the brightness component of the video signal to one end of a delay line which, in response to transient changes in the brightness component is short-circuited at its other end by a transistor, the once-delayed short-circuit signal being employed to intensity modulate the beam, and the twice-delayed reflected signal being subtracted from the original brightness component to provide the control signal for modulating the scanning velocity (Fig. 4, not shown).
Patent GB-1367918-A (GB)
Title: Method and apparatus for the perforation of metal foils and thin metal plates
IPC: B04B7/16
Filed: 1971-10-13
Abstract: 1367918 Removing metal by fusion; making filters HEIN LEHMANN AG 13 Oct 1971 [19 Oct 1970] 47570/71 Headings B3V and B3A [Also in Division B1] Spaced apart slots are formed in a metal workpiece by a high energy pulsed ray, e.g. a laser or electron beam, having a round or elliptical cross-section by relatively moving the workpieee and pulsed ray so as to produce overlapping holes in the workpiece, the length of each slot produced being equal to (n - 1)t + d wherein n is the number of pulses, t is the hole spacing and d is the slot width. If a is the distance between adjacent slots, the value a+d is equal to a hole multiple of t. In one embodiment the slots are produced by moving a sheet workpiece and when the desired slot length is reached, the pulse sequence is interrupted until the workpiece has moved by the desired spacing a. In other embodiments, a cylindrical workpiece and the beam are moved to produce slots which may extend in the circumferential direction, parallel to the cylinder axis or at an angle thereto. A conical workpiece for a filter may be provided with rows of slots which are spaced apart by a greater distance (b<SP>1</SP>) (Fig. 15, not shown) at the smaller diameter end than at the opposite end. The energy beam may strike the workpiece at an inclined angle. An apparatus for carrying out the method includes in one embodiment clamps 4, 5, Fig. 16, for clamping a metal sheet 6 and movable apart by a threaded spindle 7 for tensioning the sheet 6. The molten metal is collected in a dish 13. In other embodiments (Figs. 17 and 18, not shown) a cylindrical or frusto-conical workpiece is clamped to rotatable clamping discs.
Patent GB-966462-A (GB)
Title: Improvements in or relating to vehicle wheels
IPC: B60B15/02
Filed: 1962-12-17
Abstract: 966,462. Wheels. E. W. TYLER & CO. Ltd., and J. TYLER. July 15, 1963 [Dec. 17, 1962], No. 47578/62. Heading B7C. [Also in Division B5] A vehicle wheel comprises a metal centre part 10 on which are formed two or more radially extending webs 13, 14 supporting a cylindrical tread 17, the webs and tread being made of synthetic-resin-impregnated fibrous material. As shown, the part 10 is a normal wheel having a rim 11 intended to accommodate a pneumatic tyre. The webs 13, 14 and tread 17 are moulded of glass fibre mat and polyester or epoxy resin, the webs being connected by a lining 15 in rim 11. The webs may also be connected by transverse webs (Fig. 1, not shown), and the hollow space between webs and tread may be filled with foamed plastic. Mild steel angle sections 18 are incorporated in the tread to improve the traction grip of the wheel, which is for " off the road " use. The basic wheel 10 may comprise two pressings welded together as shown, or a rim welded to an internal web. In building, mould discs are applied to the wheel 10 to mould webs 13, 14 with flanges 16, the resin is cured, and then tread 17 is built, wrapped over flanges 16, as shown. A similar wheel may be built on a basic wheel intended to take two tyres side-by-side. The gap between the two rims is bridged by a preformed ring of V-shaped section on which additional webs are formed, so that the tread is supported by four circumferential webs in all.
Patent GB-1506478-A (GB)
Title: Semiconductor switching device
IPC: H01L29/87
Filed: 1975-11-20
Abstract: 1506478 Semiconductor devices NMBELENKOV A I KURNOSOV and E E MALITSKY 20 Nov 1975 47841/75 Heading H1K The switching voltage of a PNPN switching diode is determined by the breakdown of a PN junction 14 between one of the base regions 3 and an additional region 5 of the opposite conducting type to the region 3, the additional region 5 being located wholly within, and being of smaller area than the bottom surface of, a recess 6 in the upper device surface, and being electrically connected to the other base region 2. Such electrical connection may be provided, as shown in Fig. 1, by means of a conductive path 9 between the two regions or, as shown in Fig. 3, by a direct contact between the base region 2 and part of the additional region 5 Various alternative configurations for providing this direct contact are disclosed. In a modification of the Fig. 3 device a second additional region (18), Fig. 8 (not shown), of the same conductivity type as but more heavily doped than the base region (3) is provided in the surface of the region (3) between the emitter region (4) and the first additional region (5). In another modification a layer (19) Fig. 9 (not shown) of a negative-temperature-coefficient metal silicide is deposited on the base region (3) between and spaced from the emitter region (4) and additional region (5). This compensates for the positive temperature coefficient of the switching voltage. Fig. 10 shows the application of the invention to a 5-layer symmetrical switching diode. The manufacture of the various embodiments using conventional materials and techniques is described.
Patent GB-1339186-A (GB)
Title: Seat adjusting arrangements
IPC: A47C3/20
Filed: 1971-10-14
Abstract: 1339186 Adjustable seats DAIMLER-BENZ A G 14 Oct 1971 [31 Oct 1970] 47869/71 Heading A4J The inclination of a vehicle seat is adjusted by rotation of a handwheel 14 causing rotation of a transversely extending spindle 10 on which the seat pan 5 is mounted and rolling movement of bent spindle portions 20, 20a 21, 21a on the teeth of vertical rows of teeth 19, 19a formed in the shanks of U-shaped posts 8, 8a. For both height and inclination of the seat to be altered, two spindles, one at the front and one at the rear of the seat, are provided, the spindle (9) Fig.1 (not shown) at the front of the seat passing through a slot (22) formed on the seat side 6 to allow for the two spindles engaging the posts at different heights. The front spindle (9) is biased into engagement with the rows of teeth by a spring (23) with one end attached to the spindle (9) and the other end attached to the underneath of the seat pan 5 or to the rear spindle 10. In advertent disengagement of the two spindles is prevented by engagement of stop surfaces 26 on oval-shaped cams 12, 12a provided each spindle with outwardly bent flanges 28 on each of the posts 8, 8a.
Patent GB-1282738-A (GB)
Title: Improvements in the production of ether-alcohols
IPC: G01C1/06
Filed: 1969-10-01
Abstract: 1282738 Ether-alcohols HENKEL & CIE GmbH 1 Oct 1969 [2 Oct 1968] 48132/69 Heading C2C Ether- and polyether-alcohols are prepared by reacting a compound having at least one alcoholic hydroxyl group with an alkylene oxide in the presence of stable carbonium ions (defined) as catalyst. The carbonium ions, e.g. tropylium, are preferably mesomeric stabilized and derived from diphenylmethyl, triphenylmethyl or cycloheptatrienyl. Preferred alcoholic starting materials are mono- and poly-hydric alcohols of the aliphatic, cycloaliphatic and alkylaromatic series containing 1 to 24 carbon atoms, e.g. tetradecanols, octanols, butanols and oleyl alcohol.
Patent GB-1198303-A (GB)
Title: Correcting Jitters in Electrical Signals
IPC: H04N1/113
Filed: 1967-10-24
Abstract: 1,198,303. Automatic timing control systems. XEROX CORP. 24 Oct., 1967 [28 Oct., 1966], No. 48213/67. Heading H3A. Jitter in the electrical output of a facsimile transmitter caused by jitter in the rotation of a rotating prism scanner 10 is removed by imposing a variable delay on the output signals corresponding to the variations in rotational speed of the scanner 10. In Fig. 1 the output of the tachometer 12 is integrated and fed to an amplitude quantizer 18 the outputs of which control AND gates 34-46 at the outputs of equal delay sections 22-32. With zero error the gate 40 is open; a positive or negative error increases or decreases the delay imposed on the output signals of the photo-multiplier 20 by closing gate 40 and opening one of the other AND gates. If necessary a compensating delay 16 may be introduced into the delay selection circuit. The system may also be applied to a receiver, Fig. 4 (not shown), or to a combined transmitter/receiver. The delay sections may each comprise a series and a shunt LC circuit each tuned to a frequency equal to the maximum frequency to be transmitted, Figs. 5A and 5B (not shown).
Patent GB-1117238-A (GB)
Title: Apparatus for producing an elongate article from particulate material
Inventor: LYSAKOWSKI EDWARD
IPC: B22F3/18
Filed: 1964-11-27
Abstract: 1,117,238. Feeding compacting rolls. BRITISH IRON & STEEL RESEARCH ASSOCIATION. 9 Nov., 1965 [27 Nov., 1964], No. 48334/64. Heading B5A. Apparatus for producing elongate articles, e.g. continuous strips, from particulate material, e.g. metal powder, comprises a pair of driven compacting rolls and means to feed the material to the bight of the rolls, the feed means comprising a housing containing a rotatable member having a plurality of circumferentially spaced radial projections thereon which, together with the housing, define pockets to receive material from the inlet of the housing and discharge it from the outlet thereof to the bight of the rolls. In a preferred form, the rotating member has a plurality of coaxial sets of the circumferentially spaced radial projections, the projections of each set being circumferentially staggered with respect to the projections of an adjacent set. The inlet may have a variable cross-sectional area to vary the rate of feed to the rotatable member.
Patent GB-1119999-A (GB)
Title: Fuel cell electrodes and a process for the manufacture
IPC: H01M4/86
Filed: 1965-06-11
Abstract: A sintered porous fuel cell electrode is produced by compacting and sintering a powdered mixture of one or more of the borides, carbides, nitrides or silicides of Ti, Zr, Hf, V, Nd , Ta, Cr, Mo, W, Mn, Fe, Co, Ni with one or more of the above metals and dissolving part of the metal from the sintered body.  The carbides, borides, nitrides and/or silicides form 10-99% by weight of the mixture which may also include pore forming additions such as NaCl, NH4Cl or camphor. The powders have a grain size of 1-50 microns and are reduced in hydrogen at 400 DEG  - 900 DEG C. and cooled in vacuum or a protective atmosphere prior to mixing.  The sintering temperature ranges from 4/5 of the melting temperature to the melting temperature of the lowest melting constituent. The sintered body is activated anodically in dilute phosphoric acid.
Patent GB-1523491-A (GB)
Title: Methods and compositions for cleaning ovens and the like
IPC: C11D3/00
Filed: 1976-11-23
Abstract: 1523491 Oven cleaners COLGATE-PALMOLIVE CO 23 Nov 1976 [25 Nov 1975] 48383/75 Heading C5D A method for cleaning surfaces which are subjected to heat and are liable to, or are, soiled by baked on food deposits, for example oven interiors, comprises applying a mixture of sodium bicarbonate and potassium bicarbonate in which the latter predominates preferably in a weight ratio of 1:7 to 1:17. The composition is preferably in the form of an aqueous solution, and may contain anionic, non-ionic, or amphoteric surfactants, an example of the last being The solution may be put up as an aerosol, in which event a non-ionic emulsifier, for example an ethoxylated fatty alcohol, for the propellant, may be incorporated, or may be put up as a paste or gel, in which event a thickening agent may be incorporated.
Patent GB-1566049-A (GB)
Title: Morphine / apomorphine rearrangement process
IPC: C07D221/18
Filed: 1977-11-22
Abstract: Apomorphine derivatives are prepared with an improved yield by transposition of the corresponding morphine derivative in the presence of anhydrous phosphoric acid under a partial vacuum, generally between 9 and 20 mm of mercury and at a temperature between 125 DEG C and 140 DEG C.
Patent GB-1533905-A (GB)
Title: Apparatus and process for the removal of pollutant material from gas streams
IPC: B01D47/10
Filed: 1976-11-22
Abstract: 1533905 Removal of pollutant material from gas streams LONE STAR STEEL CO 22 Nov 1976 [28 Nov 1975] 48646/76 Heading B1R Pollutant material is removed from a gas stream by mixing the stream with a liquid in a mixing zone so as to encapsulate the pollutant in liquid droplets, directing the mixture containing the droplets from the mixing zone into a diverging diffuser zone of gradually increasing cross-sectional area defined by an inner surface having opposed diverging surface portions and deflecting the flow of the mixture as it enters the diffuser zone away from one of the opposed diverging surface portions toward the other of the opposed diverging surface portions to cause de-entrainment of the droplets from the mixture. The mixture may be deflected by .forming a curtain of fluid material transversely of the diffusing zone so as to be in the flow path of the mixture and/or by interposing a plate to intercept the flow of a portion of the mixture.
Patent GB-1318896-A (GB)
Title: Continuous production of neutral adipic esters
IPC: A22B5/08
Filed: 1970-10-14
Abstract: 1318896 Adipic acid esters BADISCHE ANILIN- & SODA-FABKIK AG 14 Oct 1970 [15 Oct 1969] 48802/70 Heading C2C Neutral adipic acid esters are prepared in a continuous process by reacting solid adipic acid with cyclohexanol or an alkyl alcohol (4-16 C) with or without methoxy or ethoxy groups at 120-180‹ C. in a mixing zone and the mixture passed to an esterification stage at 180‹ to 250‹ C. in which the alcohol is maintained boiling. A molar ratio of acid to alkanol of 1 : 2 in the mixing zone is preferred, and the reaction proceeds autocatalytically.
Patent GB-1240069-A (GB)
Title: Metal vapor lamp
Inventor: WHITE JOHN EDWARD
IPC: H01J61/073
Filed: 1969-10-03
Abstract: 1,240,069. Metal vapour lamps. GENERAL ELECTRIC CO. 3 Oct., 1969 [21 Oct., 1968], No. 48812/69. Heading HID. A metal vapour lamp for diffused hollow cathode mode operation includes at least one thermionic self-heating cavity electrode comprising an outer wire coil 19 of W, Ta, Re or an alloy thereof, an inner wire coil 20 or porous pressing of W, Ta, Re or an alloy thereof projecting forward beyond the outer coil and which defines at least the front portion of the cavity, a metal shank 17 supporting the inner and outer members, a heat radiation shield 21 and a reservoir 22 of emission material in the cavity which has a depth greater than its diameter. The members are attached to the shank by additional smaller diameter turns 18 of coil 19. The shield 21 is of sheet W crimped to reduce contact. The emission material is thoria containing nitrocellulose or 30% by weight WC. In another embodiment, Fig. 3 (not shown), a plurality of windings are arranged on the shank, one of the windings acting as the heat shield. The end of the inner winding is welded to the preceding turn and its end chamfered flat. Formation of molten drops on the inner winding during initial lighting is eliminated by removing hydrocarbons by repeated high current-low pressure arcing and heating with an oxyhydrogen flame to remove rough edges and carbon and carbides near the surface. The lamp comprises a bulbous envelope in which is mounted a quartz arc tube containing two cavity electrodes and a Hg, NaI, ThI and InI atmosphere operating at 1 to 15 atmospheres. The ends of the arc tube have heat-reflecting coatings and the envelope may be evacuated.