baber/WOPTO huggingface dataset:
Patent GB-1216068-A (GB)
Title: Improvements in vehicle horns
IPC: G10K9/13
Filed: 1969-09-26
Abstract: 1,216,068. Electromagnetic horns. ROBERT BOSCH G.m.b.H. 26 Sept., 1969 [28 Sept., 1968], No. 47514/69. Heading G5J. An electromagnetically operable horn comprises an electromagnetic oscillator to oscillate a diaphragm 10, and a linearly extending sound tube 17<SP>1</SP> of constant internal diameter D K  whose one end is located adjacent the diaphragm and whose other end carries a bell-mouth 18<SP>1</SP> which opens in an exponential manner, the dimensions of the horn being such the length of the linearly extending sound tube is equal to a quarter of the wavelength of the desired note of the horn, the ratio of the diameter of the diaphragm D M  to the diameter D K  is substantially 5:1, the quotient of the diameter of the outlet of the bell -mouth and the internal diameter of the sound tube is 4 Œ 10%, and the quotient of the length of the bell-mouth and the diameter of the outlet of the bell-mouth is 1 Œ 10%. A pressure chamber 16 is recessed in a pressure chamber plate 14, which carries a magnetic system of the oscillator, and is contiguous to the sound tube, the longitudinal axis of which is perpendicular to the axis of the magnet system. The sound tube, the bell-mouth and the pressure chamber plate are integrally formed from a plastics material.
Patent GB-1068199-A (GB)
Title: High voltage semiconductor device
IPC: H01L21/308
Filed: 1964-11-23
Abstract: 1,068,199. Semi-conductor devices. INTERNATIONAL RECTIFIER CORPORATION. Nov. 23, 1964 [Nov. 26, 1963], No. 47618/64. Heading H1K. A semi-conductor, e.g. silicon, wafer containing a plane PN junction extending completely across the wafer is provided with an annular groove 24 extending from one face of the wafer and breaking through the junction. The groove is formed by a two-stage etching process. In the first stage (Fig. 3, not shown) the base, edge and outer part of the top surface of the wafer are covered by an etch-resistant, e.g. PTFE, jig 20 and the inner part of the top surface by an etch-resistant plate 21. An acid etch then produces an annular groove of U- section just breaking through the junction. The plate 21 is then replaced by the smaller plate 23 of Fig. 4 and a second etching gives the groove the shape shown, in which the tangent to the inner surface of the groove at the plane of the junction makes an acute angle with the junction, e.g. between 10 and 60 degrees and preferable about 45 degrees. The groove is then filled (Fig. 5, not shown) and the entire surface of the device covered, with varnish. The completed device may be encapsulated, and if the encapsulation provides an inert environment the varnishing step may be omitted.
Patent GB-1403164-A (GB)
Title: Method for removing dents
IPC: H05B3/00
Filed: 1973-10-11
Abstract: 1403164 Restoring to form E SCHILL 11 Oct 1973 [8 Jan 1973] 47623/73 Heading B3Q Dents 8<SP>1</SP>, Fig. 5, in sheet metal are removed by tapping movements of an electric welding appliance having a handle, the appliance heating spots 15, Fig. 7, of the metal which thus draws-in in the area surrounding the heated points. The tops and sides of car bodies may be straightened, badly raised points being first partly restored by an autogenous welding torch. Apparatus for performing the method includes a welding tool 12 having a copper electrode 11 surrounded by a safety sleeve 13, and a clamp 9 for gripping the work. A casing 1 contains a transformer and a choking coil, Fig. 2 (not shown).
Patent GB-1067499-A (GB)
Title: Textile treatment
IPC: D06M14/06
Filed: 1963-12-03
Abstract: Textile fibres are modified by reacting them under free radical initiating conditions with at least two different ethylenic compounds, one of which is an alkyl acrylate or a C2+alkyl methacrylate which has a glass transition temperature, in polymer form, less than about 40 DEG  C. Specified fibres are those of keratin (wool) cotton, rayon and cellulose acetate.  The mixture of monomers may be a mixture of alkyl acrylates or methacrylate or a mixture thereof with other acrylates or methacrylates, ethylenic mono- and di-carboxylic acids and esters, nitriles and N-substituted amides thereof, vinyl aromatic compounds, vinyl and vinylidene halides and vinyl heterocyclic compounds. Free-radical initiators specified are peroxides, azo compounds and redox systems.  The examples describe contacting wool fibres with aqueous liquids containing ferric nitrate, hydrogen peroxide and:  (1) butyl acrylate and styrene, (2) 2-ethylhexyl acrylate and styrene, (3) acrylonitrile and butyl acrylate, or 2-ethylhexyl acrylate, and (4) (a) butyl methacrylate and styrene and (b) acrylonitrile and butyl or 2-ethylhexyl methacrylate.
Patent GB-1160788-A (GB)
Title: Improvements in or relating to the Manufacture of Magnetically Soft Metallic Materials
IPC: H01F1/147
Filed: 1967-10-20
Abstract: 1,160,788. Nickel-iron alloys. VACUUMSCHMELZEL G.m.b.H. Oct. 20, 1967 [Oct, 21, 1966], No.47802/67. Heading C7A. Magnetically soft material having high excursion range of induction and pulse permeability, suitable for choke or pulse transformer cores, is made by annealing an alloy consisting of 61-67% Ni, 2-4% Mo and remainder Fe, with usual deoxidation and processing additives e.g. 0À49-0À6% Mn, at 950-1220 C. for 4-6 hours e.g. in a H 2  atmosphere low in O 2 , then heat-treating at between the Curie-point (500-550C.) and 200C. for 3-5 hours, preferably in a magnetic field whose lines of force run transversely in the alloy to the ultimate direction of the magnetic flux. Prior to heat-treating, the annealed alloy may be cooled to 200C. or below with or without heating to above the Curie-point e.g. to 750 C. The alloy may be in the form of rolled strip 0À006-0À05 mm thick.
Patent GB-1285921-A (GB)
Title: Picture telephone arrangement
IPC: H04N7/14
Filed: 1969-09-29
Abstract: 1285921 Picture telephone TELEFONAKTIEBOLAGET L M ERICSSON 29 Sept 1969 [10 Oct 1968] 47858/69 Heading H4F In a picture telephone or telegraph facsimile transmission system, in which a field of view is scanned at a transmitter C and reproduced at a synchronized receiver T in raster fashion, a signal generated at MD is applied to both transmitter and receiver to adjust the angle of the field of view scanned and the angular extent of the reproduced picture in a corresponding sense, without altering the number of lines in the raster, thereby changing the resolution of the system. As shown, this may be done optically, by switching in lenses L1 and L2 which respectively lengthen the vertical dimension of the field at C and reduce the vertical dimension of the viewed picture, or electronically, by simultaneously varying the line spacing of the rasters at C and T. The vertical deflection voltages from V1 and V2 are fed via voltage dividers VD1 and VD2 controlled by the signal from MD. A direct voltage generator G is also controlled by MD so that the portions of the normal field actually viewed e.g. top and bottom halves, may be selected. Alternatively a lens arrangement may be used at one end of the system and an electronic control at the other end.
Patent GB-1235930-A (GB)
Title: Improvements in or relating to information storage arrangements
Inventor: BOBECK ANDREW HENRY
IPC: G11C19/08
Filed: 1968-10-09
Abstract: 1,235,930. Magnetic storage apparatus. WESTERN ELECTRIC CO. Inc. 9 Oct., 1968 [12 Oct., 1967], No. 47870/68. Heading H3B. In an information storage device in which single wall domains are moved from position to position in a sheet of magnetic material in response to consecutively offset propagation fields a spatially varying bias field in the sheet enhances the propagation by providing preferred positions for the domains. In the arrangement of Fig. 1 a single wall D is produced from a source 13 of positive magnetization and separated therefrom by conductor 12 connected to input pulse source 14. The domain D is moved in any direction toward output positions coupled by output conductors 17 by consecutive offset conductors P1, P2, P3 which are appropriately pulsed. In order to provide preferred sites in sheet 11 a magnetic sheet 25 of coercive force relatively high with respect to sheet 11 is positioned contiguous to sheet 11 so that any localized magnetic regions in film 25 remain fixed in position when propagating fields are applied to sheet 11. In an alternative arrangement a sheet of glass is provided with holes filled with magnetic material to provide a field which is maximum at domain positions and falls off rapidly outside these positions. The non-uniform bias field may be realized by a magnetic tape suitably magnetized or by evaporation of magnetic dots on a sheet of glass or by a high coercive force mesh sheet. The preferred positions permit adjacent domains to be more closely packed. Instead of using a non-uniform bias a uniform magnetic bias may be present in which case sheet 11 is provided with a plurality of pairs of apertures spaced apart along the direction of propagation of a domain, Fig. 7 (not shown), each of the pairs straddling the line of propagation and the distance between the apertures of each pair being less than the diameter of the domain thereby impeding the propagation of the domain. The apertures thus provide high reluctance air gaps which distort a uniform bias field provided by a magnet M, Fig. 1. In the arrangement of Fig. 8 (not shown) a sheet of high permeability material provided with a line of apertures along the line of propagation of a domain is placed adjacent sheet 11. The apertures present a high reluctance in the presence of a bias field and the flux concentrating about the edge of each aperture provides a field configuration which keeps the domain centered above the aperture. A plurality of bar magnets having both poles on or adjacent a surface of sheet 11 may be used, each magnet providing an attractive pole defining a preferred domain position and a repelling pole, Fig. 9 (not shown).
Patent GB-1440354-A (GB)
Title: Magnetic tape recording and/or playback apparatus
IPC: G11B15/16
Filed: 1973-10-15
Abstract: 1440354 Cleaning magnetic heads MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 15 Oct 1973 [16 Oct 1972 (3) 17 Nov 1972] 48007/73 Heading G5R A magnetic tape recording and/or playback apparatus has a head cleaning unit comprising a solid block 24 carrying a cleaning member 28 and movable from a first position to a second position, against a bias spring 29, or a tape container 30, such as a cassette or cartridge, is inserted into the apparatus the member 28 thereby sweeping a magnetic recording and/or playback head 17. The member 28 is mounted on a resilient strip 27 which is engaged by a member 31 during the last part of the movement from the first to the second position and the first part of the reverse movement to disengage member 28 from head 17. The cleaning member 28 may be synthetic or natural spongy material, flexible foamed plastics or felt, and is impregnated with silicone oil, benzine or acetone.
Patent GB-1159806-A (GB)
Title: Improvements in or relating to Condition Responsive Transmitting Units
Inventor: LACEY ALBERT FREDERICK
IPC: G01F23/36
Filed: 1965-11-12
Abstract: 1,159,806. Measuring liquid level electrically. SMITHS INDUSTRIES Ltd. Nov. 11, 1966 [Nov. 12, 1965], No.48041/65. Heading G1N. [Also in Division H1] A liquid level gauge includes a potentiometer having a printed resistive track 18, Fig. 4, and a float operated wiper. The track 18 is on an insulating board 10, and has a rotatable wiper which moves along a line 22, a constant voltage source, energized for example from a vehicle battery, being connected via a heated bi-metallic strip type meter (2, Fig. 1, not shown) to one end 17 of the track, the wiper being earthed. The track, which may be an alloy of nickel and chromium or copper is of serpentine configuration, and the part remote from the end 17 is narrower than the rest (the change in width occurring at 21) to give a non-linear resistance variation. In an alternative track configuration Fig. 5 (not shown) the part 16 of the track between the end terminal 17 and the limit 23 of wiper movement is of greater width and length to provide heat dissipation in the event of an excessive voltage arising due to a fault in the regulation thereof. If a norrow track (18, Fig. 6, not shown) is used to achieve higher resistance per unit length widened portions (36) are provided for contact with the wiper. A float assembly for monitoring the fuel level of a vehicle Figs.2, 3 (not shown) consists of a float (11) on an arm (7) carrying the wiper (13). The board (10) carrying the track is mounted on a plate (6) in a housing (15), contact to the end 17, (Fig. 5), of the track being made via a rivet (29), a conductive strip (30), and a terminal (32) mounted in a plate (4) fixed in the tank wall and carrying the fuel outlet tube (5).
Patent GB-1457080-A (GB)
Title: Vessel for floation loading and unloading and partial buoyancy support of barges and other floating cargoes
IPC: B63B35/40
Filed: 1974-11-06
Abstract: 1457080 Container traffic; securing containers WHARTON SHIPPING CORP 6 Nov 1974 [8 Nov 1973 2 Oct 1974] 48093/74 Heading B8Q [Also in Division B7] A vessel 10, for transporting a series of floatable containers such as barges or lighters 16 comprises a hull 11 with rigid support portions 14 and having a perforated bottom 12. The hull has bow 22, stern 21 and sidewalls 17 providing a series of buoyancy chambers 18 and hold 32. Water is introduced and expelled to or from the buoyancy chambers to adjust the draft, trim and list of the vessel. Gate 23 can be opened to load containers with winches 35 and closed during transportation of them. Piston/cylinder devices 50 releasably lock each container in place on the supporting portions and when loaded the containers are partially supported in the vessel by their own buoyancy and the containers are secured to the vessel in such a way as to enable transfer to the vessel of a significant part of the buoyancy of the containers.
Patent GB-1292893-A (GB)
Title: Ignition leads
Inventor: ROWBOTHAM EDWIN MERVYN
IPC: H01B3/00
Filed: 1970-10-13
Abstract: 1292893 Extruded ignition lead FORD MOTOR CO Ltd 13 Oct 1970 4850/70 Heading B5A [Also in Divisions H1 and H2] An ignition lead is made by extruding a mixture of P.V.C., carbon black, plasticizers, lubricant and stabilizers through a first orifice 16 and passing the extruded conductive core 10 through a second orifice 19 where a P.V.C. sheath 11 is extruded over the core. The sheathed cable is then passed through a cooling bath.
Patent GB-1216986-A (GB)
Title: Glazed ciramic article
Inventor: BERGER IRIS
IPC: C03C4/00
Filed: 1970-06-04
Abstract: 1,216,986. Glazed ceramic article. WISSENSCHAFTLICH - TECHNISCHER BETRIEB KERAMIK. 4 June, 1970, No. 48543/67. Heading C1M. In a glazed ceramic article, the ceramic is composed by wt. of: SiO 2 , 35-60%; Al 2 O 3 , 25-40%; K 2 O or Na 2 O, 2-10%; with or without compatible ingredient(s) or impurity; and the glaze is composed by wt. of: SiO 2 , 55-69%; Al 2 O 3 , 20-25%; MgO, 6-10%; K 2 O of Na 2 O, 2-5%; B 2 O 3 , 3-5%; Ca 5 (PO 4 ) 3 - OH, 0-0À5%; with or without compatible ingredients or impurity. The coefficient of thermal expansion of the glaze is preferably 1À5-2À0 x 10<SP>-6</SP>. The burning temperature of the glaze, i.e. the temperature at which the glaze becomes capable of flowing smoothly, is preferably 1370-1390‹ C. The article may be a briquette and may be coated by dipping or spraying with a slip of the glaze-forming mixture. Before coating, article may be a fired or unfired body of the above composition. 'The ceramic may be prepared from a batch of: clay 14%; kaolin, 39%; alumina, 10%; talcum, 22%; orthoclase, 15%. The glaze may be prepared from: ceramic fragments, 50%; talcum, 10%; orthoclase, 5%; Al 2 O 3 , 5%; kaolin, 5%; borosilicate frit, 24À5%; Ca 5 (PO 4 ) 3 - OH, 0À5%; the borosilicate frit is SiO 2 , 79À5%; Al 2 O 3 , 4%; K 2 O, 5%; B 2 O 3 , 11À5%. The glaze is wet-ground till only 0À05% of the mixture has grain size > 63 Ám. On firing, a pronounced crystal phase is present in the glaze, in which cordierite, corundum, mullite, and protoenstatite are detectable. The intermediate layer mullitized from the porcelain is built up from solid cordierite crystals in close contact.
Patent GB-1120696-A (GB)
Title: Minimum discharge pressure regulator for compressors
IPC: F04B49/00
Filed: 1966-10-31
Abstract: 1,120,696. Compressing gases. WORTHINGTON CORP. Oct. 31, 1966 [Nov. 30, 1965], No.48693/66. Heading F1N. A Venturi 8 is inserted in the discharge line 7 of a compressor 1 downstream of an oil separator tank 5 having an oil return line 6 to the compressor, whereby the pressure upstream of the Venturi is maintained above a predetermined value when the pressure downstream thereof drops below a predetermined value. The throat area of the Venturi is chosen so that when the downstream pressure drops below the predetermined value sonic velocity is reached at the throat and the corresponding flow rate therethrough and that of the compressor ensures that the pressure upstream of the Venturi is above the predetermined value. During normal operation the flow is subsonic so that the losses due to the Venturi are a minimum.
Patent GB-1154545-A (GB)
Title: Improvements in or relating to Letter Files
Inventor: REED MILES
IPC: B42F13/12
Filed: 1966-10-31
Abstract: 1,154,545. Filing papers. C. W. CAVE & CO. Ltd. 31 Oct., 1966, No. 48763/66. Heading B6E. [Also in Division D1] In a loose leaf binder of the kind comprising a cover 2, 3 folded at the spine to provide a pair of narrow flanges 5 between which the leaves 12 are bound by means of an elastic or extensible cord 7 threaded through perforations in the leaves and flanges by a bodkin 6, the bodkin comprises a length of wire or the like which is bent into a narrow elongated loop, and has its free ends (11a, Fig. 4) brought together and secured by a cap 11. The bodkin 6 may be made of nickel-plated wire, the cap 11 of nickelplated metal, and the cap can either be soldered or crimped over the ends (11a) of the wire: or, the bodkin and cap can be made of synthetic plastics material, and the cap can be secured by crimping, adhesive, or by heat-sealing.
Patent GB-1364420-A (GB)
Title: Gas-burning torches
IPC: F23D14/60
Filed: 1970-10-14
Abstract: 1364420 Gas-burning torch BRITISH OXYGEN CO Ltd 13 Oct 1971 [14 Oct 1970] 48858/70 Heading F4T [Also in Division F2] A gas burning torch comprises a conduit 6 for air or other oxygenous gas, a conduit 8 for fuel gas at a lower pressure, a valve located in the fuel gas conduit having a valve body 32 urged by a spring 38 into a low-flow position wherein sufficient gas can flow through a passage 44 to support a pilot flame, and an injector 22 which is fed with air via a valve 14 by operating a manual lever 16 whereupon the flow of relatively high pressure air overcomes the spring bias on the valve body 32 to move the latter into a full flow position and allow gas to flow to the injector 22 for mixing via passages 40, 42 and 39. The valve 14 comprise a head 18 biased against a seat 20 and provided with a jet screwed into a tapped hole in the valve head so that sufficient air flows through a passage in the jet to support the pilot flame when the lever 16 is not actuated. Preset trimmer valves 10 and 12 are provided in the conduits 6 and 8 respectively.
Patent GB-1409727-A (GB)
Title: Power supply unit
IPC: H02M3/337
Filed: 1972-10-25
Abstract: 1409727 Automatic voltage control MULLARD Ltd 25 Oct 1972 49214/72 Heading G3R A regulated power supply uses a class D amplifier comprising push-pull drive transistors connected to the primary of a power transformer. A class D generator is controlled in accordance with the supply output voltage to produce pulses which, by way of auxiliary isolating transformers, switch the drive transistors on and off by voltage reversal. In the circuit shown, the primary winding of main transformer T 1 is connected to drive transistors TR1, TR2 and receives half-wave rectified voltage over diode D1 from an A.C. supply. Alternatively, full-wave rectified or D.C. voltage may be used. The transformer output is rectified D2, D3 and smoothed L1, C1, and then sensed by a feedback amplifier FA which controls the width of pulses produced by Class D generator CDG. A divide-by-two circuit DIV and AND gates Al, A2 convert the generator output into alternate driving pulses for transistors TR5, TR6 connected to an external supply El to produce, through transformers T2, T3, signals which turn on control transistors TR3, TR4 and drive transistors TR1, TR2. At the same time, collector voltage for the transistors is produced by secondary windings on a further transformer T4 controlled by transistors TR7, TR8 connected to the divide circuit DIV. For positive switching off, transformers T2, T4 produce a negative base voltage on transistor TR3 and a reverse collector voltage respectively, while transistors TR2, TR4 are correspondingly controlled. It is stated that transistors TR3, TR4 may be omitted or replaced by Darlington pairs, and a chopped A.C. output may be taken from the secondary of transformer T1. Reference has been directed by the Comptroller to Specification 1302298.
Patent GB-1389708-A (GB)
Title: Cutting inserts
IPC: B23B27/22
Filed: 1972-10-25
Abstract: 1389708 Insets for cutting tools SANDCO Ltd 25 Oct 1972 [27 Oct 1971] 49300/72 Heading B3B A cutting insert has a cutting edge 13 and a chip breaker in the form of a groove 11 which extends along-side the cutting edge around the periphery of the insert and bounding a central region 12 of an end surface of the insert, the cutting edge having a profile which varies in height along its length and the depth and width of the groove being constant with respect to the cutting edge. In the embodiments described the insert is triangular and has three contiguous cutting edges each cutting edge which terminates at the corners of insert being formed by two concave portions and a central convex portion 15 and 16 respectively. The central portion may be a straight portion 20 instead of convex. Alternatively the concave portions may terminate adjacent their respective corners with straight portions. Other minor variations in configuration are shown in the Figures.
Patent GB-1185748-A (GB)
Title: Manufacture of Moulds
IPC: B22C9/00
Filed: 1968-10-18
Abstract: 1,185,748. Making moulds for metal casting. SWISS ALUMINIUM Ltd. 18 Oct., 1968 [20 Oct., 1967 (2)], No. 49494/68. Heading B5A. [Also in Division C3] A self-hardening mould for metal castings is made by applying to the surface of a pattern coated with a parting agent a rapid-hardening slurry comprising a binder, hardener, solvent and a refractory powder which does not sinter at the temperature of the molten metal with which the mould is to be used, and before this first layer has completely hardened, applying over the first layer, a thicker second layer of a hardenable sand mixture containing an additive to slow the rate of hardening. The same binder may be used for both layers and a reinforcing mesh may be embedded in the surface of the sand layer, a supporting structure optionally being attached to this mesh. The parting agent may be paraffin, glycerol, kerosene or a silicone oil, the binder is preferably sodium silicate, the refractory powder talcum, graphite, quartz or zirconium oxide, the solvent water and the rapid acting hardener one of anhydrous aluminium sulphate, aluminium diphosphate, glyoxal, titanium silicofluoride, cement, gypsum, ferrosilicon powder, calcium silicon powder and aluminium powder. The sand mixture preferably comprises coarse quartz sand sodium silicate solution and one of sodium silicofluoride, sodium aluminate, dicalcium silicate and sodium zirconium silicate as the slow hardening material. The binder may also be cement, alcoholic ethyl silicate, a silicic acid sol or an organic binder such as a phenol or furan resin.