baber/WOPTO huggingface dataset:
Patent GB-1302605-A (GB)
IPC: H03F1/32
Filed: 1970-04-24
Abstract: 1302605 Amplifier circuits WESTERN ELECTRIC CO Inc 24 April 1970 [25 April 1969] 19717/70 Heading H3W The invention relates to an arrangement for reducing noise and distortion in amplifiers. An amplifier comprises first and second parallel signal paths, the first of which includes in cascade a main amplifier 12, Fig. 3 and a first delay network 18 and the second includes in cascade a second delay network 16 and an error amplifier 17, means 9 being provided for dividing input signals into two components and for coupling a different one of the components into the input end of each of the signal paths. Means are also provided for coupling a portion of the output of the main signal amplifier 12 into the input of the error amplifier 17, comprising a reactive network 20 having two pairs of conjugate ports and having a transmission coefficent |t| and a coupling coefficient |k| between coupled ports, where the main signal amplifier 1 and the second delay network being coupled respectively to one pair of conjugate ports 1, 2 respectively. The first delay network 18 and error amplifier 17 are coupled to the other pair of conjugate ports 3, 4 respectively: the gain characteristic G(w) of the main amplifier 12 and the gain characteristic g(w) of the error amplifier 17 are given by G(w)αg(w)α#F(w)<SP>2</SP>-1 where F(w) being the gain-frequency characteristic of the amplifier. Output means 19 are provided for combining in an output circuit the signals from the two signal paths in time and phase to minimize error components in the output signals. The output means 19 may comprise a transformer, one winding being connected in series in the first signal path and the second winding, which has a greater number of turns, in the second signal path (Fig. 2, not shown). It may alternatively comprise a hybrid coupler 50, the two signal paths being coupled to ports 1, 2 respectively, the output taken from port 3, and port 4 being terminated in a resistive termination, the overall gain being brought to a desired value by means of alternator 32. Four port reactive coupler 20.-The coupler may comprise a hybrid coupler, e.g. "magictee" or "quadrature coupler". A more complex coupler, to obtain the desired frequency response, comprises a pair of hybrid junctions 40, 41 Fig. 4 coupled by means of two wavepaths 42, 43. Path 42 includes a reactive twoport network N whose coefficients of transmission t(w) and reflection k(w) have the required coupling characteristic. The other path 43 includes a reactive network N<SP>D</SP> which is the dual of network N, having the same coefficient of transmission t(w) but a coefficient of reflection - k(w) which is equal but of opposite sign.
Patent GB-206894-A (GB)
Title: Improvements in fireplaces
IPC: F24B1/191
Filed: 1922-07-18
Abstract: 206,894. McCallum, T. S., and Calto Co., Ltd. July 18, 1922. Blowers; ashes, collecting; ash - pans; braziers; canopies and hoods; outlets to chimneys. - A portable firebox, adapted to be hung on the front bars of a kitchen range, or to be placed in front of an open fireplace, comprises a front grate 6 and imperforate bottom 8 and sides 9, and is provided with an integral or detachable hood 2 which extends upwardly and backwardly towards the chimney and has an opening 3 in its front face. This opening is adapted to be closed by a removable plate 4 which may also be positioned in front of the bars 6, Fig. 1. A detachable inclined shoot 5 is fitted to the lower end of the fire-box to direct ashes &c. on to the hearth below the grate. When the device is used in front of an open fire-place, Fig. 3, the hood 2 is formed with a removable extension 13 and the fire-box rests on a stand 10 in which is fitted a detachable ash-pan 11 having inclined louvers 12 to conceal the ashes. At one or both of the upper front corners. of the device a projection 28 may be provided for the reception of the pivot pin of a trivet 29.
Patent GB-1137143-A (GB)
Title: Burnt basic refractory brick impregnated with carbon and process for its production
IPC: C04B35/03
Filed: 1966-05-04
Abstract: 1,137,143. Magnesia brick. VEITSCHER MAGNESITWERK - ACTIEN - GESELLSCHAFT. 4 May, 1966 [14 May, 1965], No. 19735/66. Heading C1J. A fired magnesite brick contains 2-5% by wt. Fe 2 O 3  calculated free of ignition losses, wherein the Fe 2 O 3 , CaO and SiO 2  components are almost completely combined to dicalcum silicate and dicalcium ferrite, and the ceramically-bonded brick is impregnated with a carbon carrier. The brick may have the composition by weight: MgO 84-95%; SiO 2  0À1-2%; Fe 2 O 3  2-5%; CaO 2-8% and not more than 1% of other constituents. The raw materials, preferably of grain size below 500Á, may be sinter-burned, formed into bricks and subsequently vacuum impregnated with tar to give a brick having a residual porosity of not greater than 2% by volume for use in lining vessels in steel manufacturing processes which use oxygen.
Patent GB-759831-A (GB)
Title: Improvements in or relating to sheet metal fabrications
Inventor: GRENELL LELAND H
IPC: B21C37/14
Filed: 1953-02-26
Abstract: 759,831. Making sheet metal fabrications such as heat exchangers; jointing by rolling. OLIN MATHIESON CHEMICAL CORPORATION. Feb. 26, 1953, No. 19739/54. Divided out of 759,804. Drawings to Specification. Classes 83 (2) and 83 (4). [Also in Groups X and XIII] The subject-matter of this Specification is substantially identical with that described in Specification 759,804 but the claims differ. The formation of a single sheet containing weld separation material from two sheets may be effected by cold pressure welding of the two sheets.
Patent GB-238539-A (GB)
Title: Improvements in tyre protectors or annular wheels for vehicles
IPC: B60C19/12
Filed: 1925-08-05
Abstract: 238,539. Lotte, L. P. C. Aug. 18, 1924, [Convention date]. Endless-track vehicles. -An annular track or tyre for vehicle wheels comprises an outer tyre 2 considerably larger than the ordinary wheel which rolls inside it, and an independent metallic ring 1 intermediate in size between the tyre and the ring and rolling between them. Holes 6 are made in the ring 1 to assist in cooling it, and the tyre 2 is hollowed at 5 to increase the air space for cooling purposes. The rubber or other tyre 2 has shoulders 3, 4 to guide the ring 1, and a flexible metallic band 9 may be provided in the groove of the tyre to strengthen it.
Patent GB-867823-A (GB)
Title: Hydrocarbon conversion process
IPC: C01B3/22
Filed: 1958-06-20
Abstract: <PICT:0867823/III/1> A portion of gas flowing in line 33 from a gas generator (see Group XII) is continuously withdrawn for infra-red analysis through line 34 into cooler-knockout drum 45.  This drum comprises a cooling section supplied with cooling water through lines 48 and 49 which cools the gases in line 34 before they pass to knockout section 47; in this section condensate and free carbon collects and is withdrawn through line 55.  Gas leaves through line 57 which also passes through cooler section 46, and any further condensate which forms falls back into chamber 47.  Pressure reducing valve 58 reduces the pressure from the value of up to 500 p.s.i.g. which exists in lines 33, 34 and 57 to up to 200 p.s.i.g.  The gas in line 59 is then taken for analysis, but in order to ensure rapid response of the sampling system to changes in the gas stream 33, the apparatus is continuously flushed by withdrawing a bleed stream through line 61, valve 62 and orifice 63 to a vent.
Patent GB-369110-A (GB)
Title: Improvements in closures for metal boxes and like containers
IPC: B65D41/04
Filed: 1931-07-09
Abstract: 369,110. Screw-cap stoppers. NAAMLOOZE VENNOOTSCHAP WED. J. T. NUMAN'S BLIKFABRIEKEN, 325, Haarlemmerweg, Amsterdam. - (Assignees of Weiland, H. U. S., 50A, Overschie, Holland.) July 9, 1931, No. 19820. Convention date, May 19, 1931. [Class 125 (iii).] To facilitate removal a screw-cap stopper for metal boxes, tins, and the like has two wings 4 extending outward horizontally from the lower edge of the cap 1, their edges 5 being bent down on every side.
Patent GB-182702-A (GB)
Title: Improvements in or relating to coking retort oven heating flues
IPC: C10B29/02
Filed: 1921-07-26
Abstract: 182,702. Warden, E. H. July 26, 1921. Blocks, special shapes of.-In a coke oven, in which triangular-section flues are formed in the heating-walls by partitions 3, 4, the former arranged normally to the faces of the wall, and the latter extending diagonally across the rectangular spaces formed by the partitions 3, portions of the diagonals are integral with bricks 3A forming part of the normal partitions.
Patent GB-917003-A (GB)
Title: Coated surface and process of coating
Inventor: KISH GEORGE DEXTER
IPC: C09D195/00
Filed: 1960-06-08
Abstract: Metal surfaces, e.g. steel plates, weldments, pipes and pipe couplings are coated by applying to the surface a composition containing coal tar pitch and an epoxy resin in the presence of a curing agent for the epoxy resin and before said last named coating has substantially cured, applying thereto a coating of a bituminous enamel and allowing said enamel coating to dry.  Prior to treatment with the epoxy resin composition the surface may be cleaned with a solvent, e.g. xylol or carbon tetrachloride, sand or grit blasted, wire brushed and/or given a first coating of a thermosetting resin composition, e.g. a phenolic resin which is not allowed to completely set before application of the epoxy resin composition.  The coated pipes may be subsequently wrapped in asbestos felt, kraft paper or glass fibre webs and the wrappings may be further coated with pipe enamel and additional wrappings applied.  The epoxy resin composition and enamel are applied by brushing, roller application, spraying or immersion, in solvents, e.g. high flash naphtha, benzol, toluol or xylol and the epoxy resin may be partially cured by heat.  The bituminous enamel is preferably applied to the first coating, after heating the latter in air containing carbon dioxide or carbon monoxide to 200 DEG -650 DEG F., by immersion in a molten bath thereof.  Specified enamels are coal tar, asphalt and water works or pipe enamel, these preferably have a softening point of at least 190 DEG F., a penetration of at least 2 at 115 DEG F. with a weight of 50 gms. for 5 secs. and an ash value of at least 20% by weight. Specified curing agents are polyfunctional amines, e.g. ethylene diamine, ethylene triamine, diethylene triamine, benzyl dimethylamine, 3-dimethyl-aminopropylamine, 3diethyl-aminopropylamine or tetra-ethylene pentamine.  A specified epoxy resin is the epoxy ether resin from bis phenol and epichlorhydrin.  The resin composition may contain fillers, e.g. talc and mica.  The pipes may be coated by suspending on an overhead conveyer and treating the pipe at a series of stations with the two components of the coating.  Said stations comprise a spraying, heating and vertically moving dipping station.ALSO:Metal surfaces are coated by applying to the surface a composition containing a coal tar pitch and an epoxy resin in the presence of a curing agent for the epoxy resin and before said last named coating has substantially cured, applying thereto a coating of a bituminous enamel and allowing said enamel coating to dry.  The epoxy resin composition is applied in solvents, e.g. high flash naphtha, benzol, toluol or xylol and may contain fillers, e.g. clay, talc and mica.  The resin coating may be partially cured by heat. Specified curing agents are polyfunctional amines, e.g. ethylene diamine, ethylene triamine, diethylene triamine, benzyl dimethylamine, 3-dimethyl-amino propylamine, 3-diethylamino propylamine or tetraethylene pentamine.  A specified epoxy resin is the epoxy ether resin from bisphenol and epichlorhydrin.
Patent GB-749806-A (GB)
Title: Cooling apparatus suitable for hot granular material
Inventor: BARBOUR DAVID ROYDS
IPC: C10B39/02
Filed: 1954-07-09
Abstract: 749,806. Cooling furnace charges. IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 9,1954, No. 20128/54. Class 51(2). Apparatus for cooling pebble lime, cement clinker, dolomite or sintered iron ore discharged from a rotary furnace comprises concentric walls 13, 15 and 17 of octagonal cross-section supported by steel joists 5 and surmounted by a horizontal baffle 25 onto which is fed hot charge material through a hopper 11 set in the arched brickwork roof 9. The outer walls 13 comprise insulated metal sheets and the charge material falls between the inner walls 15 and 17 which are formed of wedge wire for the passage of cold air supplied to the space between the wall 17 and a central pipe 19. Cold air is also supplied by the pipe 19 below the baffle 25 giving an initial cooling as it passes through the material falling from the baffle into the shaft. The baffle may be replaced by a refractory cone. The upper part of the walls 15, 17 is formed of firebrick 21 and 23. A hot air outlet (not shown) leads through the roof 9 to the rotary furnace. The charge material is discharged at the base of the shaft by conventional vibrators (not shown).
Patent GB-941337-A (GB)
Title: Golf tee
IPC: A63B57/00
Filed: 1961-06-05
Abstract: 941,337. Golf tees. E. N. H. DAVIES. July 5, 1962 [June 5, 1961], No. 20147/61. Heading A6D. A golf tee comprises a shank having a spike at one end, a ballsupporting cup formed integrally therewith at the other end, and a circumferential flange, also integral with the shank, disposed around the shank between the spike and the cup, for the purpose of limiting the degree of penetration of the tee into the ground. The tee is preferably formed from a plastics material by injection moulding.
Patent GB-1536683-A (GB)
Title: Pipe connections
IPC: F16L17/10
Filed: 1976-05-13
Abstract: 1536683 Pipe joints BRITISH STEEL CORP 13 May 1976 [13 May 1975] 21050/75 Heading F2G A joint for pipes having coaxial passageways is provided by sockets each provided on radially inner side annular recesses 13, 18 sealed by flexible membranes 16, 20 and ducts 23, 24 connected to said recesses for supplying pressure fluid thereto to seal against spigot pipe ends.
Patent GB-877525-A (GB)
Title: Centrifugal speed governor
IPC: G05D13/08
Filed: 1958-06-24
Abstract: 877,525. Governors. HOLLEMAN, W. June 24, 1958 [Aug. 14, 1957], No. 20172/58. Class 57. A centrifugal governor for controlling the speed of a shaft 2 comprises a plate member 9 and dished member 1 mounted for rotation with the shaft and arranged to be moved relatively away from each other axially of the shaft against the force of a spring 14 by the action under centrifugal force of three units 21 which are guided in radial slots in the plate member, the central portion 22 of each unit and shafts 24 projecting outwardly from the side faces thereof being arranged to have rolling contact with the dished member and plate member respectively. Each unit 21 is in the form of a bearing unit of which the outer race 22 is guided in a radial slot in the member 9 and contacts the dished member 1 and the inner race 23 has a central shaft 24 contacting the underside of the member 9. The dished member has a cylindrical rim 8 having a clearance fit around the plate member. In operation, the outward movement of the units 21 under centrifugal force causes the dished member 1 to be forced against the spring 14 to operate a linkage 25.
Patent GB-407862-A (GB)
Title: Improvements in and relating to circuits for mercury vapour rectifiers
IPC: H02M7/06
Filed: 1933-07-17
Abstract: 407,862. Rectifying alternating current. SIEMENS - SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. July 17, 1933, No. 20192. Convention date, July 18, 1932. [Class 38 (ii).] In a polyphase rectifier in which current dividing coils 3 are provided between the supply transformer 1 and the anodes of the rectifier 2 the supply transformer and the current dividing coils are loaded with third harmonic currents by connecting consumers taking third harmonic currents, e.g. saturated choking coils 5, 6, 7, between the anode leads thus ensuring equal current division between pairs of anodes even at light loads.
Patent GB-297454-A (GB)
Title: Improvements in or relating to telephone sets incorporating manually operable selectors
IPC: H04M9/00
Filed: 1928-07-11
Abstract: 297,454. Siemens & Halske Akt.- Ges. Sept. 22, 1927, [Convention date]. Intercommunication apparatus; table sets.- Selectors for intercommunication systems are designed so as to be interchangeable, in a telephone set, with dial type impulse transmitters. As shown the selector arm 9 which is provided with a window is provided with spring 24 engaging notches 25, and moves a wiper 12 over terminals 13. The calling push 11 is moved against a spring 21 and is latched by engagement of a groove 23 with a member 19 which cooperates with the cradle. Preferably the upper part of the housing and the cradle are aluminium die castings and the lower part, which contains the bus bar, induction coil and buzzer, is of drawn sheet metal. Alternatively the housing may be pressed from insulating material. The selector is secured to the housing by means of screws and bayonet hooks.
Patent GB-650909-A (GB)
Title: Improvements in or relating to the preparation of diallyl ether dioxide
IPC: C07D303/28
Filed: 1948-07-30
Abstract: Diallyl ether dioxide is produced by dehydrohalogenating a diallyl ether dichlorhydrin in presence of an aqueous solution of p  a strong base, preferably at 0-25 DEG  C.  The reaction mixture is extracted with a solvent such as carbon tetrachloride and the extract, after removal of solvent, distilled under reduced pressure.  Hydroxides and carbonates of alkali or alkaline earth metals are suitable bases.  In examples, diallyl ether dichlorhydrins are prepared by reacting the monochlorhydrin, obtained from epichlorhydrin and allyl alcohol, with hypochlorous acid, by reacting diallyl ether with hypochlorous acid or by treating glycerol b -monochlorhydrin with epichlorhydrin in presence of boron trifluoride in acetic acid at 100 DEG  C.  They are treated with aqueous caustic soda at 15 DEG  C. or room temperature to yield the dioxide.
Patent GB-1036477-A (GB)
Title: Method for the treatment of raw glass material containing easily volatilizable ingredients
Inventor: OKAMURA TSUNEO
IPC: C03C1/02
Filed: 1963-05-22
Abstract: In a method of treating raw glass material containing easily volatilizable additives, the raw material containing the additives, of which at least one easily vaporizes giving off poisonous gases, is mixed with powdered cullet in the range 0.05 to 30% by weight with respect to the cullet, the resulting mixture then being sintered in the temperature range 500 DEG  to 1200 DEG  C. before charging to a furnace.  This enables a larger proportion of the volatile ingredient fed into the furnace to be retained in the final glass.  To give better results the batch mixture may be subjected to pressures of from 60 to 500 kg./cm.2 before sintering for example, to form pellets or briquettes.  The volatile ingredients used are chosen from antimony, arsenic, selenium, sulphur, and tellurium.
Patent GB-188063-A (GB)
Title: Improvements in printing and like machines
IPC: B41F31/15
Filed: 1921-07-30
Abstract: 188,063. Wilson, H. W. V., and Victory-Kidder Printing Machine Co., Ltd. July 30, 1921. Inking-apparatus.- An ink-distributing roller of a printing-machine or a coating-roller in a coating-machine is reciprocated longitudinally by means of two coacting face cams in continuous contact, and rotated by gearing at different speeds. As shown, the cams 7, 8 are carried by loose and fast gears 9, 10 on the shaft 2 of the roller 1 and are held in contact by a spring 6. Gears 11, 12 transmit the drive from the gear 10 to the gear 9, the shaft 2 being driven by gears 4, 5.
Patent GB-933055-A (GB)
Title: Improvements in and relating to adjustable drawing tables
Inventor: WENGER OTTO
IPC: A47B27/14
Filed: 1962-05-28
Abstract: 933,055. Drawing boards. PREFINA G.m.b.H. May 28, 1962, No. 20464/62. Class 52 (3). A drawing board 6 is pivotally mounted, as at 8, on a telescopic column comprising an inner tube 3 and an outer tube 2 in turn mounted in a hollow pedestal 1 and includes within the pedestal a pair of motors 9, 10 adapted to move axially the inner tube 3 of the telescopic column and to tilt the drawing board about the axis 8 by means of elongated extensible means 30 pivotally connected at its ends to the inner tube 3 and to an edge 27 of the drawing board 6. A hollow screw spindle 14 arranged within the column is rotated by a first electromotor 9 and engages a nut 15 secured to the inner tube 3 thereby to produce axial movement of the inner tube and vary the height of the drawing board on its support 5 carried by the head member 4 of the column. A second electromotor 10 rotates telescopic spindle 20, comprising a square bar within a square tube, which is connected by a universal joint 21 to a screw spindle 22 engaging the internal threads 25 of a tube 26 arranged to telescope within a further tube 30 fixed to a part 24 of the head 4 which part 24 pivots on axles 23 arranged parallel to the tilt axis 8. The tube 26 is pivotally connected at its free end 28 to an edge 27 of the drawing board so that operation of the motor 10 causes the drawing board to tilt about the axis 8. The motors 9, 10 are secured symmetrically to the outer tube 2 of the telescopic column which may be removed with a pedestal cover-plate 32 from the pedestal 1.
Patent GB-439309-A (GB)
Title: Improvements in or relating to ventilating systems for vehicles
IPC: B60J1/14
Filed: 1934-07-13
Abstract: 439,309. Vehicle windows ; draughtexcluders. PRESSED STEEL CO., Ltd., (formerly PRESSED STEEL CO., OF GREAT BRITAIN, Ltd.), Cowley, CLAY, W. H., Flat No. 1, Woodstock Close, Woodstock Road, and MATON, W. C., 45, Glanville Road, all in Oxford. July 13, 1934, No. 20560. [Class 20 (iii)] A pivoted window in a vehicle is provided with a sealing strip 15 symmetrically disposed on the top and bottom and forward edges and the pivots pass through the strip. The frame 19 is cambered to allow the window to swing inwardly and outwardly at the front edge for the extraction or intake of air. The rubber or like sealing strip may have a circular or channel shaped edge.
Patent GB-639503-A (GB)
Title: Improvements in or relating to dart boards
IPC: F41J3/00
Filed: 1948-08-04
Abstract: 639,503. Dart boards. SALTER, A. W. W. Aug. 4, 1948, No. 20606. [Class 132 (iii)] A dart board, Fig. 1, comprises a plurality of blocks 5 of fibrous material arranged in transversely and longitudinally extending rows, the lines of blocks in one direction being threaded on metal wires 8 which are welded or otherwise secured at their ends to a frame 4 surrounding the board. Metal reinforcing strips 10 may be threaded onto the metal wires 8 at intervals of say every three lines of blocks, the strips being urged tightly into contact with the blocks against which they abut before their ends are welded or otherwise secured to the surrounding frame 4. Each block 5, Fig. 2, is bound by two spaced apart wires 6 and a hole 7 is formed through it between the wires 6.
Patent GB-331393-A (GB)
Title: Improvements in rugs for horses and the like
IPC: A01K13/00
Filed: 1929-07-05
Abstract: 331,393. Warneford, W. F., and Warneford, E. B. July 5, 1929. Clothing for animals. -A rug for horses and other animals passes completely round the body of the animal and is secured at the side by means of straps 3 and buckles 4 attached to the edge 1, the straps passing through slots 5 in the overlapping edge 2. These edges may be reinforced with stiffening material. The rug may have extensions 8 as shown to form a breast portion provided with fastening straps 9 and buckles 10, or a separate breast cloth may be employed attached to the rug in any suitable manner. A positioning strap 12 is secured at one end to the rug behind the forelegs and at the other end to the breast cloth or to a breast strap. The positioning strap may take the form of an extension of the rug, which constitutes a covering for the lower part of the chest. If quarter sheets are employed, these may be retained in position by means of straps on the bottom sheet engaging buckles on the rug.