baber/WOPTO huggingface dataset:
Patent GB-390227-A (GB)
Title: An improved arrangement for the prevention of cross-talk
IPC: H01B13/02
Filed: 1931-10-06
Abstract: 390,227. Automatic exchange switches. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgaten, Stockholm. Oct. 6, 1931, No. 27794. Convention date, Oct. 7, 1930. [Class 40 (iv).] Contact fields or multipling wires are arranged with the a-wires in one plane and the b-wires in a parallel plane and so disposed that, having regard to the inductive effect of any pair, the preceding and following pairs are on equipotential surfaces. Preferably the insulation between the planes has a greater dielectric constant than the insulation, preferably air, between wires in the same plane. Calculations are given to assist in designing the system, but the distances between the planes and between the wires of a pair are determined by tests involving the use of a model comprising two sets of cylinders A, B, representing the a and b wires. Sound currents are applied to one pair and a telephone receiver is coupled to an adjacent pair and the sets are then moved about until a favourable arrangement is discovered.
Patent GB-603514-A (GB)
Title: Improvements in lock nuts
IPC: F16B39/36
Filed: 1945-10-22
Abstract: 603,514. Locking-nuts. FOCKEU, A. L. V. Oct. 22, 1945, No. 27817. [Class 89 (i)] Lock-nuts having a split conical inner portion keyed against rotation in a correspondingly coned outer member are provided with means for limiting the contraction of the inner member to prevent excessive tightening on the bolt. This is preferably effected by causing the sides 11 of the keyway in the member 5 to close on the sides of the key 3. Accidental separation of the parts of the nut is prevented by a small flange on the inner part that springs into a recess in the bottom of the outer part. In a modification, an upstanding flange on the outer part may be turned over the larger end of the inner part and may at the same time secure a cap in place to cover the bolt end.
Patent GB-992802-A (GB)
Title: Gear shaper
IPC: B23F23/12
Filed: 1961-08-01
Abstract: 992,802. Gear-cutting. M. EDA. Aug. 1, 1961 [Aug. 23, 1960], No. 27935/61. Heading B3L. In a machine for shaping internal or external gears, means are provided for moving the work spindle 18 to and from the cutter 10 for relief purposes by oscillating an eccentric sleeve 82. The sleeve is oscillated by a cam 108 and a lever 94. The work is rotated through gearing 62, 60, 24, 20, the relative movement between the gears 62, 60 during relief movements being insufficient to disturb the drive. The direction of relief movement can be adjusted by angular movement of a second eccentric sleeve 84.
Patent GB-932187-A (GB)
Title: Improvements in and relating to colour television
Inventor: MATTINGLY PETER HENRY
IPC: H04N9/24
Filed: 1959-08-04
Abstract: 932,187. Colour relevision tubes. SYLVANIA - THORN COLOUR TELEVISION LABORATORIES Ltd. July 27, 1960 [Aug. 14, 1959], No. 27943/59, Class 39 (1). A viewing screen for a colour television receiver comprises, in the order named proceeding from a transparent face-plate 11, colour phosphor strips R, G, B, light-emissive index strips I, and a metallic coating A 1 , A 2  which, between the strips I, is continuous and of high light-reflecting power and which, over strips I, is discontinuous and of substantially higher light-transmitting power than the continuous coating. Light from the index strips passes through a window in the wall of the cathode-ray tube, e.g. to a photomultiplier. As shown, during manufacture of the screen, a layer N of nitrocellulose is applied over the phosphor strips and intervening guard bands D of opaque material, before application of the index strips I, which emit light mainly in the violet and ultra-violet part of the spectrum, and which may comprise calcium magnesium silicate or calcium aluminium silicate activated by cerium. A layer of aluminium is then evaporated on to the exposed surface, forming a continuous coating on the smooth layer N but a discontinuous coating on the strips I transmitting 20-25% of the light emitted therefrom. The layer N may remain in the finished screen or be wholly or largely removed in a subsequent baking process. Specifications 895,772, 932,185 and 932,186 are referred to.
Patent GB-279944-A (GB)
Abstract: 279,944. Luttropp, C., and Lindahl, A. Aug. 4, 1926. Adding-apparatus; displaying items; error keys. -In a single-bank independently-operated machine the item set up in the denominational selector is simultaneously displayed on an indicator 14 adapted to move step by step synchronously with the selector 2 by means of gearing 6, 7, 8, spindle 9, and pinion and rack 10, 11. Each numeral wheel of the indicator has a setting-rack 17 and these arrive in turn opposite a column of stops 19 connected by links with the respective keys. The rack in operative position is normally retained by a spring-controlled detent 30 mounted on a lateral arm 34 of a lever 35 pivoted at 36 but when a key is depressed an universal connection 29 is rocked and by a rod 32 thrusts the detent out of engagement with the rack. A link 28 is similarly shifted to draw down a lever 20 carrying a hammer 23 which thereupon depresses the positioned rack until it is arrested by the protruded stop 19. As the key returns to normal, the selector and the indicator move one step, the detent engages the succeeding rack 17, and the one just set is locked by running on to a fixed ledge 33. When the item has been completely set the operating handle is operated to rock a sector 3 to and fro. In its forward movement the sector by striking an abutment 38 rocks the lever 35 counterclockwise and thus withdraws the arm 34 and detent 30 to permit the indicator to return to normal position. When the sector rocks back again it strikes another abutment 37 to restore the lever 35 and the arm thereupon raises all displaced racks 17 to their initial positions. The abutment 37 is not on lever 35 but on a subsidiary lever 39 pivoted at 36 and connected with lever 35 by a pair of toggle links 41, 42 having their common pivot linked to the errorcorrecting key 46. Thus to obliterate a wrong setting this key is depressed to shift the selector back one place in the usual manner and to rock lever 35 to permit the same shift to the indicator and restore the last-operated rack 17 and indicator wheel to zero.
Patent GB-492219-A (GB)
Title: Preparation of paper pulp
IPC: D21C3/02
Filed: 1937-10-14
Abstract: Pulp suitable for paper-making is obtained from flax or hemp tow by subjecting the material to a cooking operation in a digester with a solution of water in a proportion of about 2 1/2 to 4 times the dry weight of the fibres, and 14-20 per cent sodium hydroxide and 1-4 per cent of sulphur, the percentages being based on the dry weight of the tow, and washing the cooked material to remove shive fibre and water-soluble impurities.  The tow may be taken in the wet state, after washing to remove soluble impurities, and cooked in a rotary digester at raised pressure.  After washing the cooked material, it may be dried and stored, or it may be subjected to a bleaching operation.
Patent GB-221380-A (GB)
Title: Improvements in the manufacture of emulsions or solutions of tar or the like
IPC: C08L95/00
Filed: 1923-11-07
Abstract: 221,380. Low, L. W. Nov. 7, 1923. Emulsions, making.-Emulsions of bitumen, tar or pitch, for use in painting or surfacing road paths, tennis courts &c., painting and waterproofing wood, bricks, stone, concrete buildings &c., and as a binding agent for briquettes, are prepared by mixing the bitumen &c. with a quantity of tar oils insufficient. to dissolve it and adding the mixture while stirring to a hot completely saponified mixture of casein, resin, caustic soda and water. In an example, a mixture of casein and resin is first saponified with dilute caustic soda, then a further quantity of caustic soda added and then successively to the hot mixture crude naphtha, carbolic acid, and a mixture of tar and pitch or bitumen with crude naphtha, oil or tar spirits. The product is stable and may be diluted with water. Earth colours or aniline dyes may be used to colour the mixture.
Patent GB-992960-A (GB)
Title: Improved electric and fluid pressure operated valve mechanism and control circuit therefor
Inventor: ADAMS CECIL EDWIN
IPC: F16K31/40
Filed: 1961-08-02
Abstract: 992,960. Valves. BRAKESHOE INTERNATIONAL S.A. Aug. 2, 1961, No. 28115/61. Heading F2V. [Also in Division G3] A pilot valve of a servomotor controlled valve 26 (see Division G3) comprises a valve closure member 54 which is loaded to the closed position by an electrical transducer comprising a coil 62 and armature 66 and is opened by fluid pressure in a passage 37 when this pressure overcomes the loading. The electrical circuit includes a thermistor 44 to allow for temperature changes and a variable resistance to control the load. The armature 66 only moves a maximum of 0À002 inch whereby a substantially constant force is provided. The seat of the valve slopes away from the port and is so constructed that the fluid forces acting on the valve do not vary as the valve opens.
Patent GB-1133606-A (GB)
Title: A method of manufacturing synthetic leather
IPC: D04H1/64
Filed: 1966-06-23
Abstract: 1,133,606. Microporous sheet- - material. TOYO GOMO KOGYO, K.K. 23 June, 1966 [6 'July, 1965], No. 28206/66. Heading B2E. [Also in Divisions Dl and D2] A method of making a highly vapourpermeable microporous material based on a synthetic polymer, comprises mixing uniformly with a solution of such polymer (a) an inorganic compound of particle size 40 mÁ to 2Á and substantially insoluble in the solvent,  and in the non-solvent (hereinafter referred to), for the synthetic polymer, and (b) a liquid which is a non-solvent for the said polymer and the said compound and is miscible with the solvent for the dissolved synthetic polymer within a range of 20 to 80% of the coagulation value of the synthetic polymer, the solvent referred to in (a) and (b) being the solvent in which the polymer is actually dissolved, coating a fibrous substrate with the mixture thus produced, immersing said substrate in the said liquid (b) and subsequently removing substantially all solvent for the synthetic polymer from the substrate by extraction. Specified substrates are paper and woven or non-woven fabrics e.g. napped or piled woven fabrics and three-dimensionally interlaced non-woven mails obtained by needle punching. The fabrics may be pre-impregnated with polymer. Exemplified fabrics are plain weave fabrics woven from mixed rayon and polyvinyl alcohol fibres and a carded needle-punched web of nylon-6 fibres. Specified polymers are those made by reacting a difunctional reactant having terminal primary amino groups e.g. hydrazine, hydrazine hydrate, ethylene diamine, tetramethylene diamine, polyamides or polyureas with a polyalkylene ether, polyacetal or polyester having terminal isocyanate, acid halide, carbamic acid halide or urea groups, a polyester polyurethane or a polyalkylene ether polyurethane, said polymers being optionally admixed with other polymers e.g. polyamides, polyvinyl chloride, polyacrylonitrile, polyvinyl acetate, cellulose acetate or aorylonitrtle-vinyl chloride copolymers. Specified solvents are N:N-dimethyl formamide, N:N-dimethyi acetamide, dimethyl sulphoxide, formic acid, acetonitrile and tetrahydrofurane. Specified non-solvents are water, methanol, ethylene glycol and glycerol. Specified inorganic compounds are calcium carbonate, magnesium carbonate, clay, collcidal silica and zinc oxide. The treated fabrics may be dried, buffed or embossed and may be used as leather substitutes.
Patent GB-678301-A (GB)
Title: Improvements relating to ploughs
IPC: A01B3/421
Filed: 1949-11-03
Abstract: 678,301. Reversible ploughs. BOWLES, E. Sept. 28, 1950 [Nov. 3, 1949], No. 28229/49. Class 6(i) A reversible tractor-mounted plough comprises right- and left-hand bodies 1, 2 bolted to a metal plate 7 which is also bolted to a bracket 8 secured to a tubular member 9, rotatable on a longitudinal shaft. The shaft is carried by a frame 12 supported on the power-lift links 25 of the tractor. The tube 9 is rotated by the tractor motor through a universallyjointed shaft 21 and gearing 17. 18. Retractable bolts on the frame 12 engage apertures in a small disc secured to the tube 9, to hold the assembly in operating positions. Further bodies 3, 4, offset from the pair 1, 2, are carried by a plate 7 secured to a bracket 14. Adjustable depth wheels 16 are provided, and the ploughs may be preceded by coulters 13. Electric, hydraulic or manual means may also be employed for rotating the tube 9.
Patent GB-420194-A (GB)
Title: Improvements in and relating to appliances for removing bearing races, wheels and soforth
IPC: B25B27/06
Filed: 1933-10-12
Abstract: 420,194. Removing ball races &c. from shafts. SMITS, F., 119, The Chase, Wandsworth Road, London. Oct. 12, 1933, No. 28240. [Class 61 (iii)] A device for removing ball races &c. from shafts comprises two co-operating tubular tapered members 1, 5 in threaded engagement at 4, 6, the member 5 which is of spring steel being slit longitudinally to form a number of jaws 8 bearing on the tapered part 3 of the member 1 and having inwardly directed ribs 9 at the extremities to engage the groove 10 in the race 11. The inner mem - ber 5 has a threaded bore 12 for the extractor screw 13.
Patent GB-1298646-A (GB)
Title: Ball cock construction including horizontal inlet mounting and anti-syphon device
Inventor: SCHOEPE ADOLF
IPC: F16K31/26
Filed: 1971-06-17
Abstract: 1298646 Fluid-pressure servomotor systems A SCHOEPE and F E SCHMUCK 17 June 1971 [2 July 1970] 28349/71 Heading F2V [Also in Division G3] A float-actuated valve 14 for filling a cistern 18 has holes 62 providing communication between the air above the cistern water level and the valve outlet 30 to prevent syphoning and a resilient member 48 to prevent water flowing through the holes when the cistern is being filled. The member 48 is deflected into the position shown in broken lines to engage a seating surface 60 while water is flowing through an  outlet tube 46 into the cistern. Holes 64 in the member 48 provide a flow area at least as great as that of the holes 62 to ensure an adequate flow of air into the valve inlet 10 when the supply pressure falls. The valve closure member 40 is controlled by a pilot 44 coupled to the float 16 by a lever 88, link 82 and a spring clip 84. Circumferentially spaced ridges 72 guide the float on the tube 46 and prevent the collection of sediment which could hinder movement of the float. Buoyancy is provided by air trapped beneath the float which has a water chamber 74.
Patent GB-481416-A (GB)
Title: A rotating electrical liquid switch
IPC: H01H35/10
Filed: 1937-10-18
Abstract: 481,416. Actuation of switches. EERHARD. J. M., EERHARD. C., and AANDEWIEL, C. J., (trading as EERHARDAANDEWIEL, [Firm of]). Oct. 18, 1937, No. 28356. Convention date, Oct. 17, 1936. [Class 38 (v)] An electric switch for controlling the rotation of a machine shaft such as exists in a mechanically propelled vehicle comprises a liquid tight drum 1 of conducting material filled with an insulating liquid, and a vane 3 pivotally fixed at 5 to a holder 6 which is secured to a spindle 2 rotated by the shaft under control. While the shaft is stationary, a contact 4 on the vane 3 is held in contact with the drum 1 by the adj ustable tension of a spring 9 acting on a member 8 rigidly connected to the vane 3. Upon rotation of the spindle 2 in the direction of the arrow 14 the inertia of the oil moves the vane relative to the spindle 2 and breaks the connection between the contact 4 and the drum I.. The Specification includes modifications of the invention, in one of which the effect of rotation of the spindle 2 is to make connection in the circuit, and in the other the switch is made suitable for use in several circuits or for multiphase control.
Patent GB-988040-A (GB)
Title: Improved method of hydrogenolysis of sugars
Filed: 1963-07-18
Abstract: Reducible sugars are subjected to continuous hydrogenolysis to give a product containing a high percentage of glycerol by reacting an intimate mixture of the sugar and hydrogen continuously in the presence of a hydrogenation catalyst and a cracking additive at a temperature between 190 DEG  C. and 230 DEG  C. The reducible sugars may be hexoses, such as glucose or fructose; pentoses such as arabinose or xylose; or related carbohydrates such as, for example, starch hydrolysates, particularly those having a dextrose equivalent of at least 70.  The feed solution is preferably used in aqueous solution. The preferred hydrogenation catalyst is a supported nickel catalyst promoted, for example, with iron or copper.  The preferred cracking additives are the oxides, hydroxides and salts of the alkaline earth metals.  The process is preferably carried out at a pressure of 1500-2000 p.s.i.  Specification 721,260 is referred to.
Patent GB-1091829-A (GB)
Title: Improvements relating to katharometers
IPC: G01N27/18
Filed: 1966-06-24
Abstract: 1,091,829. Automatic temperature control. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. June 24, 1966 [June 24, 1965], No.28480/66. Heading G3R. [Also in Division G1] The temperature inside a cylindrical casing 1 (Fig. 1b is maintained constant by a number of heating resistors 7 1  and temperature sensitive semi-conductor elements 41, symmetrically located in holes drilled in the wall of the casing. As shown (Fig. 5), three of the semi-conductor elements 42, 43, 44 are transistors arranged as diodes, which control the bias and fourth transistor 41, whose output is fed through a D. C. amplifier to the heating resistors 7 1 -7 8  forming the amplifier load. The forward resistance of transistors 42-44 varies with temperature to adjust the bias on transistor 41 and hence the output load current so as to maintain the temperature constant.
Patent GB-398351-A (GB)
Title: Improvements in and relating to sample cards for wool, textile materials and the like
IPC: G09F5/04
Filed: 1932-10-12
Abstract: 398,351. Displaying wool &c. MAYNE, J. E. and MAYNE, M., Brook Cottage, Littleham, Exmouth, Devonshire. Oct. 12, 1932, No. 28500. [Class 3 (ii).] A sample card for wool and like textile material is provided with one or a number of perforations each having a short slit extending outwardly therefrom for gripping a selected sample, after it has been passed through the perforation, by virtue of the inherent resilience of the card. As shown, various types and colours of wool are secured on the card by a wire clip 4 and the ends of selected sample 8 are passed through the holes 5 and pulled into the slits 6. Ruling may be provided on the card, preferably on the back, in register with each hole to form a space in which may be marked the required quantities of the selected materials.
Patent GB-745312-A (GB)
Title: Improvements in devices for dispensing predetermined quantities of liquid from a container
Inventor: MYERS WAYNE VERNON
IPC: G01F11/26
Filed: 1953-10-15
Abstract: 745,312. Dispensing measured quantities of liquid. MYERS CO., Ltd., W. V. Oct. 15, 1954 [Oct. 15, 1953], No. 28520/53. Class 106(5) A device for dispensing predetermined quantities of liquid from a can 2 comprises a tube 6 which has a spout 7 and is mounted for sliding movement in a closure cap 4, the lower part of the tube being provided with an enlargement 12 enclosing a space corresponding to that occuplied by predetermined quantity of liquid to be dispensed. To dispense a measured quantity, a screw cap 8 is removed and the can 2 tilted into a position in which the liquid level is below the open end 12<SP>1</SP> of the enlargement 12 which then empties until a trap formed by bends 9 and 10 inhibits the flow. A hole 14 of 0.02 inches diameter serves to relieve any pressure which may have been built up within the sealed can and thus prevents the liquid from spurting from the spout 7 when the cap 8 is removed. A grommet 5 of synthetic rubber and a resilient poly-vinyl-chloride washer 13 provide a limited frictional resistance to telescopic adjustments of the tube 6 with respect to the can 2. The tube 6 is of poly-methyl-methacrylate. The grommet 5 and washer 13 may be replaced by a thick washer of india or synthetic rubber and a thinner flat washer of a harder material, the thick washer being domed at the top, and if desired, at the bottom so that tightening the closure cap causes the thick washer to expand radially inward to grip the tube 6 which may then be adjusted when the closure is partly unscrewed.
Patent GB-504193-A (GB)
Title: Improvements in theatres, lecture halls and like buildings
IPC: E04H3/22
Filed: 1937-10-20
Abstract: 504,193. Theatres. KERMODE, S. Oct. 20, 1937, No. 28639. [Class 20 (i)] To obviate the. use of galleries in theatres, lecture halls, and the like, and yet to provide equivalent seating accommodation, opposed screens or stages 12, 18 are disposed at differeent levels at opposite ends of the building, and oppositely sloping auditoriums 10, 16 are superposed, the upper 16 being shaped or positioned to allow free range for the beam projected from the projector box for the lower stage. Short stairways 22 lead to the lower end of the upper floor which may or may not be provided with stairs to provide access to the seats thereon. Further stairs may be provided to give direct access to the highest part of the upper floor. More than two floors may be superposed.
Patent GB-932788-A (GB)
Title: Improved pressure reducing valve
IPC: G05D16/06
Filed: 1959-08-21
Abstract: 932,788. Fluid-pressure servo-control systems. S. O. JOHNS. Aug. 21, 1959 [Aug. 21, 1958], No. 28704/59. Class 135. A pressure-reducing valve comprises a valve body 10 having a highpressure fluid inlet 11 and a low-pressure outlet 12 separated by a flow chamber 13, a high-pressure chamber 16 communicating with the inlet via a restricted passage 18 and a low-pressure chamber 21 communicating with the outlet, a main valve member 15 coacting with a seat 14, a pilot valve 29 cooperable with a seat on the main valve, and a pressureresponsive member 22 in the low-pressure chamber, the pressure - responsive member being automatically operable on a drop in the pressure at the low-pressure outlet to open the pilot valve for the escape of highpressure fluid from the high-pressure chamber into the fluid-flow chamber at a rate greater than fluid compass through the restricted passage and thereby permit subsequent opening of the main valve member by pressure fluid in the high pressure inlet. The main valve 15 is provided with a hollow stem 27 through which passes a plunger 33 forming part of the piston member 22, the end of the plunger being adapted to just abut the end of the stem 30, Fig. 2, of the pilot valve 29 which is normally urged into sealing contact with the main valve by a spring 31; the piston member is loaded by a spring 26 through an adjustable sleeve 25 which may be enclosed by a screwed cap. In the valve position shown, the valve 15 is maintained closed by the pressurized fluid in the inlet 11 passing through the restricted passage 18 into a chamber 16, the pilot valve 29 also being urged, in addition to the loading of the spring 36, into sealing contact with a seating 28 formed on the main valve; the piston 22 is maintained in the position shown, against the action of the spring 26, by the pressure in the outlet 12 communicating with a chamber 21 via a port 20. When a decrease in pressure occurs in the outlet 12, the spring 26 forces the piston 22 upwardly thereby causing the plunger 33 to lift the pilot valve off its seating so that fluid in the chamber 16 flows through a groove in the stem 30 and out of a port 32. The pressurized fluid in the inlet 11 now lifts the valve 15 off its seating 14 and flows away through the outlet 12 until the pressure in the outlet is again brought back to that determined by the setting of the spring 26. The restricted passage 18 may be formed in the main valve 15 and the latter, pilot valve 29 and piston member 22 may all be of plastic, or natural or synthetic rubber.