baber/WOPTO huggingface dataset:
Patent GB-841434-A (GB)
Title: Spark producing apparatus and adaptors therefor
Inventor: RAMSEY FRANK RAYMOND FABER
IPC: F02P15/00
Filed: 1957-05-09
Abstract: 841,434. Ignition systems. NAPIER & SON Ltd., D. July 24, 1958 [May 9, 1957], No. 14819/57. Class 7(4). A spark producing apparatus (e.g. an ignition system) comprises a main condenser 17, a charging system for the main condenser, an auto transformer 24 the secondary winding of which can be connected across a surface leakage sparking plug 29 and which has a core 25 of high permeability low eddy-current loss material, and a series spark gap for connecting the main condenser 17 when charged across the primary winding 23 of the auto transformer and a small condenser 26, as defined, in series with this primary winding. As shown the primary winding 11 is arranged for connection across a D.C. supply 12 with the interposition of a contact breaker 13 alternatively an alternating current supply may be connected across the primary winding 11 suitable materials for the core of the auto-transformer are materials such as various magnetic ferrites or compressed powdered iron. The magnetic ferrite known as Ferroxcube may be used. By "a small condenser" is meant one having a capacity which is a small fraction of that of the main condenser but which is large compared with that of the plug lead. The spark gap 18 is enclosed in a partially evacuated glass bulb. Where several sparking plugs are employed the system is associated with a jump spark distributer (Fig. 2). Ignition in gas turbines is referred to.
Patent GB-912929-A (GB)
Title: Improvements in and relating to purification of silicon contaminated ammoniacal solutions of amonium tungstate
IPC: C01G41/00
Filed: 1961-04-25
Abstract: Si is removed from Si-contaminated ammoniacal solutions of ammonium tungstate whereby the final ammonium paratungstate product contains less than 30 ppm.  Si and maintaining the NH4OH concentration of at least 2 molar while the solution is heated at at least 50 DEG C. for at least one hour to cause precipitation and removal by filtration of the Si as SiO2. The SiO2 may also be separated by decantation.  In an example a solution from Na2CO3 pressure leaching of Scheelite ore is treated to produce a 1 molar solution of Na2CO3 containing 30-40 g./l. WO3, 3-6 g./l. Mo1 2,75 g./l. SiO2 2,5 g./l. fluoride and tracers of Cu, Al and P.  The solution is treated with an alkali metal sulphide (170% of stoichiometric required to convert Mo to a thiomolybdate complex), heated to 85 DEG C. for one hour and then acidified to pH 2,1-2,3 to precipitate MoS3.  The WO3 is extracted with an organic solvent, e.g. primary, secondary or tertiary alkyl, aryl or alkenyl amines and recovered by contacting the solvent with a 2 molar NH4OH solution containing 200-225 g. WO3/l.  The recovered WO3 solution containing, e.g. 0,2-1 molar WO3 is then heated at from 55 DEG C.-boiling point of the solution with mild agitation for at least 1, e.g. 2 1/2 , hours to precipitate SiO2, which is removed, thereby increasing the WO3:Si ratio from 15 to 1500:1.  The solution is then evaporated to crystallize ammonium paratungstate containing less than 30 p.p.m. Si.  For temperatures greater than 100 DEG C. a closed pressure vessel may be used.
Patent GB-1529127-A (GB)
Title: Method of removing scale deposited from a raffinate formed during purification of phosphoric acid
IPC: C01B25/234
Filed: 1977-04-07
Abstract: 1529127 Purifying phosphoric acid; removing scale TOYO SODA MFG CO Ltd 7 April 1977 [16 April 1976] 14851/77 Heading C1A Scale deposited from a raffinate formed during purification of a wet process phosphoric acid by extraction of the acid into an organic solvent or a mixture of an organic solvent and a strong acid is removed by contacting the scale with a solution or suspension containing a strong base to react with iron and aluminium components in the scale, said components being converted into hydroxides thereof. The solution or suspension containing the strong base may be an aqueous solution or suspension containing sodium hydroxide, potassium hydroxide, calcium hydroxide or barium hydroxide or a mixture thereof, having a concentration of at least 5 weight per cent.
Patent GB-571483-A (GB)
Title: Improved system for registering a train of positive and negative half cycles of an alternating current
IPC: H04Q1/44
Filed: 1943-09-10
Abstract: 571,483. Selective signalling. WESTERN ELECTRIC CO., Inc. Sept. 10, 1943, No. 14875.. Convention date, Aug. 6, 1942. [Class 40 (i)] [Also in Group XL] The members of a chain of gas-filled discharge tubes respond to the successive half-cycles of an incoming signal. As shown, the incoming signal is amplified at L and passed direct to a transformer POS and through a phasereversing tube INV to a transformer NEG. The effect of this is that while the current is rising (second half of a negative half-cycle and first half of a positive half-cycle) an impulse tending to cause break-down is applied to the primary (left-hand) electrodes of all the odd-numbered tubes and an impulse tending to prevent breakdown is applied to the primary electrodes of the even-numbered tubes. The converse effect is produced while the current is falling. The rising part of the first positive half-cycle. breaks down tube 1, which has a normal bias over resistance A1, and the resulting discharge current biases tube 2 so that it responds to the falling parts of the half-cycle and the subsequent negative half-cycle. Break-down of tube 2 similarly biases tube 3 which responds when the current rises again and so on. If five complete cycles are received, tube 11 is operated by the second half of the last negative half-cycle. The tubes 2 to 11 may have signalling devices connected to their cathodes to indicate how many half-cycles have been received.
Patent GB-1126251-A (GB)
Title: Colour demodulators
IPC: H04N9/66
Filed: 1966-04-04
Abstract: 1,126,251. Colour television. RADIO CORPORATION OF AMERICA. 4 April, 1966 [26 April, 1965], No. 14945/66. Heading H4F. In a colour television receiver the chrominance signal (a modulated subcarrier wave) is demodulated by a pentode which is operated with a screen potential appreciably smaller than the rated potential, the suppressor grid being operated at cathode potential, the chrominance signal being applied to the screen grid and a reference oscillation being applied via a selfbias circuit to the control grid. In the Figure, the demodulator circuit comprises two pentodes 100, 120 operating in the X-Z mode. The reference oscillations of appropriate and different phases are applied from synchronized oscillator 53 to the control grids 103, 123 via self-biasing networks 110, 111 and 130, 131, whilst the chrominance signal from amplifier 60 is applied in common to the screen grids 105, 125 which are supplied with an operating potential via resistor 116 which is small compared with the rated maximum potentials. The difference frequency components in the anodes of the pentodes are selected by filters 113, 117 and 133, 137 and applied to a matrix circuit comprising triodes 150, 160, 170 to derive the colour-difference signals R-Y, B-Y, G-Y for application to cathode-ray tube 40. The matrix triodes are D.C. coupled to the grids of the tube, the D.C. operating points of the arrangement being established by applying pulses of adjustable amplitude recurring during horizontal blanking from circuit 24 to terminal K and thence to the cathodes of the matrix triodes. The pulses drive the triodes into grid conduction and establish self bias potentials on capacitors 119, 139 and 189. The chrominance amplifier 60 is blanked during the synchronizing " burst " by pulses applied from circuit 24 to the cathode of the amplifier valve 70. A " colour killer" voltage may be applied to terminal T. Pentodes 70, 100 and 120 may be combined, each in a common envelope, respectively with triodes 170, 150 and 160. Common pentode-triodes may also be used for oscillator 53 with blanking circuit 24 and burst separator 51 with the " colour killer " circuit (not illustrated).
Patent GB-460407-A (GB)
Title: Improvements in and relating to gland packing rings of india-rubber
IPC: F16J15/20
Filed: 1936-05-27
Abstract: 460,407. Stuffing - box packing. DAVIDSON, A. S. May 27, 1936, No. 14956. [Class 122 (v)] A rubber packing-ring for pis ton rods of brake cylinders comprises a cylindrical portion 1 of reduced section connected by out wardly flaring walls 4 to flanges 2, 3. The walls 4 may be recessed at 6, 7 to provide the minimum thickness at these points. The internal diameter of the cylindrical portion is preferably less than the diameter of the piston rod.
Patent GB-1314768-A (GB)
Title: Toy figure
IPC: A63F9/00
Filed: 1971-05-14
Abstract: 1314768 Toy animals IDEAL TOY CORP 14 May 1971 [1 June 1970] 14960/71 Heading A6S A toy animal comprises front legs 12 rigidly mounted on a base 10, a head assembly 16, 18, 20 rigid with a shaft 22 mounted in journals formed in the front legs, the assembly being pivotal as a unit about the axis of shaft 22, and a body 28 also pivotally secured to the front legs; a latch 34, detent 53 and springs 46, 60 are arranged so that as weights are sequentially loaded onto the animals back, body 28 is progressively pivoted in direction 106 Fig. 1 (clockwise in Fig. 3) until the detent is released at position 54, the body then moving rapidly under gravity in direction 106 and tripping the latch 34 by interengagement between 42 and 40 to radial projection 38 of shaft 22, which allows the spring 46 to pivot the head assembly in direction 108, member 20 of the head assembly finally striking the back and pivoting the body in direction 110 into a "bucking" position, Fig. 4 (not shown). Rear legs 66 and tail 76 are loosely pivoted to the body. The rear legs do not support the body in the Fig. 1 position. The weights comprise a saddle 80, a spigot 86 of which is positioned to be struck by member 20, and items, Fig. 5 (not shown), which may be hung on the saddle.
Patent GB-1392593-A (GB)
Title: Gas discharge display devices
IPC: H01J17/49
Filed: 1973-03-29
Abstract: 1392593 Gas discharge display panels SPERRY RAND CORP 29 March 1973 [14 April 1972] 15053/73 Heading H1D A gas discharge display system comprises an array of display cells with a common anode and cathode, means for applying a gas plasma to a selected cell to reduce its ignition voltage and a source of pulsed sustaining voltage connected across the anode and cathode, the amplitude, duration and spacing between the pulses being such that only previously ignited cells are reignited. A discharge panel includes a display section 10, a stack 11 of addressing anodes 12 and a plasma reservoir. The display section comprises anode 13, insulator 15, cathode 14 and insulated plates 17, 18 which inhibit sputtering from the cathode to the face plate 16. A sustain voltage source 25 is connected across the anode 13 and cathode 14. Applying a potential to selected anodes 12 causes a gas plasma column to extend through the perforated plates to a corresponding portion of plate 13 enabling a discharge to be ignited by the sustain voltage. A discharge is erased by momentarily disrupting the sustain voltage. Cell brightness can be varied by altering the pulse frequency. The display panel is described in Specification 1,377,631.
Patent GB-647111-A (GB)
Title: Production of polymeric hydrocarbons
IPC: C08G61/02
Filed: 1948-06-04
Abstract: In the production of polymeric p-phenylene ethylene by condensation of the vapours from the pyrolysis of p-xylene, condensation is effected in the presence of an organic liquid boiling above 250 DEG C.  The liquid may be at 30-50 DEG  C. and contain a substance known to polymerize vinyl compounds.  In examples: (1) p-xylene is passed at 15 mm. through a cylindrical vessel at 940 DEG  C., with a contact time of 0.309 sec., and the vapours led through a conduit heated to 100 DEG  C., into a vessel containing dibutyl phthalate at 40 DEG C.; (2) and (3) benzoyl peroxide or azo-bis-isobutyronitrile is dissolved in the dibutyl phthalate; (4) the vapours obtained as in (1) are passed into a tube down the walls of which paraffin slowly flows, a film of polymer forming on the walls.
Patent GB-1499755-A (GB)
Title: Optical magnifiers
IPC: G02B25/00
Filed: 1975-04-14
Abstract: 1499755 Optical magnifiers MULLARD Ltd 14 April 1975 15205/75 Heading G2J A magnifier for binocular viewing comprises two eye-piece lenses El, E2 and a body B of refractive material having internally reflecting surfaces R1-4 which define two separate axes diverging from a common point in an object plane O (containing a real object or the output end of an image intensifier tube). The body B occupies substantially the whole volume of the two beams between the object plane O and the eye-piece lens L1, L2. The body B may be made from three pieces (as in Fig. 3) or moulded as a single piece of glass. The material of the body may be glass of R.1. equal to 1À7. The diameter of the object may be 18 mm and that of E1, E2 may be 10 mm. Angle 2# may be 28 degrees. A further reflecting surface may be included in the part of the body B which is common to both beams to allow the object plane O to be parallel to the line of sight through the eye-piece lenses L1, L2.
Patent GB-825788-A (GB)
Title: Improvements in or relating to mobile lifting and conveying apparatus
IPC: B66F9/18
Filed: 1957-05-14
Abstract: 825,788. Lift trucks; suction devices for handling articles. CORBIN, A. May 14, 1957 [May 15, 1956], No. 15212/57. Classes 78 (3) and 78 (4). A mobile lifting and conveying apparatus, particularly for moving cut stones having at least one flat surface, comprises a lifting mechanism mounted on a vehicle and having a suction device for gripping the load. The lifting mechanism, vehicle and suction pump being all driven from the same source of power. As shown, a member 17, Fig. 1, carrying suction heads 18, is mounted on an hydraulic ram 15, 16 on the end of a telescopic jib 9 which may be moved vertically by a rack and pinion on a rotatable mast 8 mounted on a vehicle 3. Electric motors 21 for driving the vehicle and slewing the mast, 12 for the vertical motion of the jib, and 26 for driving the hydraulic and suction pumps, are all supplied from a battery 7. The member 17 may comprise a T-section girder 33, Fig. 2, with suction heads 18 mounted on its flange and connected to a suction pipe 38 by flexible pipes 42 with stop cocks 40. A further head 55 supplies a water spray or a blast of air to clean the surface of a block before raising, and a filter 32, Fig. 1, prevents any stone dust reaching the suction pump 27. The load may be deposited on a platform 4 for carrying. In a modification (Fig. 6, not shown) the member 17 comprises an I-section girder with several cross-girders attached to its lower flange, each cross-girder carrying several suction heads 18.
Patent GB-402752-A (GB)
Title: Improvements in alkaline electric storage batteries
IPC: H01M4/66
Filed: 1932-05-28
Abstract: Alloys of magnesium and nickel containing specified proportions of manganese, cadmium, zinc and chromium are used in the manufacture of certain parts of an alkaline accumulator. Specification 365,125, [Group XXXVI], is referred to.
Patent GB-312165-A (GB)
Title: Improvements relating to tins or boxes
IPC: B65D51/28
Filed: 1930-04-03
Abstract: 312,165. Cores, F. A. April 3, 1930. [A Specification was laid open to inspection under, Sect. 91 of the Acts, May 22, 1929]. Drawings to Specification. Packing leather-cleaning materials. - The cream, grease or polish for cleaning leather and a solid colouring or cleaning material are held in the body and lid respectively of a box or tin. The Specification as open to inspection under Sect. 91 (3) (a) stated that the colouring material may be in the liquid form or in the form of powder &c. which, when dissolved, gives the liquid element. The box containing the polish may have an inner box for the liquid element or the ingredients producing it or the container for the latter may be immovably or removably fixed against the outer part of the box containing the polish or the box of polish, and the ingredients for producing the liquid element may be enclosed in a packet or envelope of cardboard &c. This subject-matter does not appear in the Specification as accepted.
Patent GB-517271-A (GB)
Title: Improvements in photographic objectives
IPC: G02B13/00
Filed: 1938-05-23
Abstract: 517,271. Lenses. KODAK, Ltd. May 23, 1938, No. 15264. Convention date, May 22, 1937. Drawings to Specification. [Class 97 (i)] In a photographic objective comprising two dispersive components between two collective components, the refractive index of at least one collective component is greater than 1.70; the curvature of the outer surfaces of the collective components may be greater than that of the inner surfaces, the axial space between the dispersive components being greater than the other axial spacings, or the radius of curvature of the surfaces of the collective components may be greater than 75 per cent of the focal length of the objective, or the collective components may be bi-convex, each dispersive component having a refractive index less than that of the adjacent collective component and at least one divergent component being bi-concave. The refractive index of each collective component may be greater than 1.75, and the adjacent collective and dispersive components may be in contact at their edges. The objective may be highly corrected and have an operative aperture of f2.0. The glass for the collective components may be as described in Specification 462,304, [Group XXIII], Optical data of examples are set out.
Patent GB-1240592-A (GB)
Title: Improved mechanical vibrator apparatus
Inventor: OCKENDEN ROBERT WILLIAM
IPC: B01F15/00
Filed: 1969-03-24
Abstract: 1,240,592. Vibrators. ENDECOTTS (TEST SIEVES) Ltd. 10 March, 1970 [24 March, 1969], No. 15312/69. Heading F2X. In a mechanical vibrator, for a test sieve shaker, an eccentric, driven by an electric motor, produces horizontal motion together with a vertical component imparted by inclined support planes on which the shaker rests. The plate 4, supporting the test sieves, 9, is vibrated horizontally by the eccentric bearing mounting 19, 20 rotated about the shaft 14 by the motor 10. The plate, 4, is also subjected to a vertical reciprocatory motion by the support pads 3 and studs 6, thus causing the material particles in the sieves to be moved over the sieve surfaces in a helical motion. The plate is biased to a neutral position by the springs 24, 26.
Patent GB-1058013-A (GB)
Title: Flexible films of thermoplastic synthetic plastics material for the protection of cultivated plants
IPC: F01C1/46
Filed: 1964-04-14
Abstract: In a process for the protection of cultivated plants, a pigmented, flexible, synthetic plastics film which is partially opaque to solar radiation is applied to the soil on which the plants are cultivated. In an example, a polyethylene film (40 microns thick) pigmented to a smoke-grey colour by incorporation of carbon is placed over soil in which young melon plants are growing.  Development of the plants is improved.
Patent GB-551038-A (GB)
Title: Improvements in or relating to nuts
IPC: F16B39/36
Filed: 1941-11-28
Abstract: 551,038. Locking nuts. ADDIS, W. A. Nov. 28, 1941, No. 15355. [Class 89 (i)] Nuts are locked by a wire spring c, bent to form rounded projections that engage the threads, and held in a shallow recess on the end of the nut by flanging-over a thin wall b or by depressing the wall at intervals. The provisional Specification states that in a modification the spring is in the form of a washer stamped from sheet metal having radially-inward projections, the washer being split or not, and in a further modification the projections are offset from the plane of the washer.
Patent GB-948006-A (GB)
Title: Improvements in or relating to a screen for a cathode ray tube for use in colour television receivers
IPC: H01J29/18
Filed: 1960-05-02
Abstract: 948,006. Colour television tubes. COM. PAGNIE DE SAINT-GOBAIN. May 2, 1960 [April 30, 1959], No. 15427/60. Heading H1D. A colour television receiver screen of the kind comprising transparent coloured filters associated with a layer of pigments adapted to produce a white luminescence is provided with colour filters constituted by transparent coloured glass filaments which are arranged parallel to the conducting elements of a colour-selection grid. The colour-selection grid may be an independent metal grid in which case the gridwires are masked from view by non-transparent glass filaments arranged with the filter filaments on the screen. Alternatively, the selection grid may be built into the screen using metal coated non-transparent glass filaments. The filaments may be preformed into a pliable sheet by arranging them parallel to each other on a temporary support and joining them by a removable binding material, the pliable sheet then being secured to the base or a sheet may be produced by arranging the coloured filaments into a warp and weaving through them a loose weft which is removed after the sheet is applied to the base. Alternatively, the base may be caused to pass below three spinnerets each producing filaments of a different colour and disposing the filaments on the support in the required colour order.
Patent GB-845210-A (GB)
Title: A method of completing multiple completion wells
IPC: E21B41/00
Filed: 1957-05-15
Abstract: 845,210. Wells. BUTLER, G. A. May 15, 1957 [Dec. 5, 1956], No. 15488/57. Class 85. A well is completed by setting a packer in the well above the oil formation, running a tubing string into the well until its lower end is a short distance above the packer, connecting a back pressure valve in the string above the well head, introducing fluid through the valve to displace mud from the string and, lowering the string through the packer into communication with the formation. The well casing 205 is surmounted by a casing head 200 on which is mounted a tubing head 10 carrying a blow-out preventer 210. The packer 211 having a flap valve 214 is lowered through the preventer to a position just above oil bearing formation 207. The string 216 carrying a packer 219 is run through the preventer until the lower end is immediately above the packer 211. A conduit 222 is connected to the string by a coupling 32 having a back pressure valve 75. Fluid from the conduit displaces mud from the string, the displaced mud being displaced through an outlet 225 in the tubing head. The string is lowered until the coupling seats in the tubing head and the lower end protrudes through the packer 211, the pressure from the formation 207 being held in check by the valve 75. A second string 230 is run through the preventer so that the lower end is just above the packer 219 which is positioned slightly above an oil bearing formation 206. The conduit is attached to the string 230 by a further coupling 32 and fluid is supplied to displace mud from the string 230. The string 230 is lowered until supported by its coupling with the lower end protruding through the packer 219. The blow-out preventer is replaced by the Christmas tree, the formation pressures being held in check by the back pressure valves. A "lubricator" is mounted on the Christmas tree, the back pressure valves are removed, the master valve is closed, and the "lubricator" removed. Specification 818,820 is referred to.