baber/WOPTO huggingface dataset:
Patent GB-867573-A (GB)
Title: Dissolution of copper
IPC: C01G3/10
Filed: 1957-10-16
Abstract: Copper is dissolved in a solution containing in solution p  10-50% wt. of a persulphate or mixture of persulphates and 1-100 p.p.m. of one or more of the metals Ag, Au, Bi, Hg, Pb, Pd, Pt and Rh.  The mixture may be heated, preferably from 100 DEG F. to a temperature below boiling point.  Specified solutions include HgCl2, AgNO3, HAuCl2, (NH4)4PtCl6 and rhodium sulphate.  The persulphate may be ammonium and/or sodium persulphate.  The dissolution may take place by immersing a metal body in the agitated solution or by spraying or brushing the solution on to the metal: the process may be used where it is desired to remove copper from objects where machining is not practicable and for the removal of copper from the unmasked portions of suitably masked copper sheets in the production of fine screens, printed circuits or copper printing plates.
Patent GB-919416-A (GB)
Title: Magnetic memory devices
IPC: G11C7/00
Filed: 1959-09-23
Abstract: 919,416. Circuits employing bi-stable magnetic elements. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept. 23, 1959 [Sept. 23, 1958], No. 32383/59. Class 40 (9). A magnetic core is interrogated by pulses at two different times separated by a short interval. A delay unit is used to feed simultaneously to a difference amplifier, the read-out signals produced at the different times. If the first interrogating pulse switches the core, the second does not and there is a difference signal. If the first interrogating pulse does not switch the core, neither does the second and there is no difference signal. The read-out signals Vo from a core may be of either polarity as the read-out winding is linked with different cores in different senses so as to cancel half-select currents. The read-out signals Vo are fed to transformer 50. Diodes 62, 64, 68, 70 are arranged as a full-wave rectifier to provide pulses V1, V2 at points 78, 72 in response to a read-out signal. The pulses at 72, 78 are of opposite polarity and inverter 80 ensures that all pulses fed to the difference amplifier 76 are positive. The first read-out pulse is fed alone to amplifier 76 and the output is rejected by an AND gate comprising diodes 86, 90 controlled by a gate 88. The second read-out signal is fed to 76 along with the delayed first pulse and the output from amplifier 76 is gated to the output lead 92. A matrix (Fig. 2, not shown) comprises rectangular cores each having three rectangular apertures. Specification 859,751 is referred to.
Patent GB-1113948-A (GB)
Title: Polymerization process
IPC: C08F210/18
Filed: 1965-07-29
Abstract: Olefine copolymers are made by copolymerizing two or more olefines in the presence of a catalyst comprising an organoaluminium compound containing halogen and a compound of a metal of Group VA of the Mendeleeff Periodic Table, and a solvent mixture for the olefines comprising from 5 to 95 mole per cent of at least one liquid aromatic hydrocarbon, or 5 to 95 mole per cent of at least one liquid nuclear halogenated aromatic hydrocarbon, and correspondingly from 95 to 5 mole per cent of at least one liquid aliphatic hydrocarbon, and controlling the molecular weight of the copolymer by preselecting the proportions of the ingredients of the solvent mixture, i.e. by using a high proportion of aliphatic hydrocarbon a copolymer of high molecular weight is formed whereas by using a high proportion of the aromatic or halogenated aromatic hydrocarbon a copolymer of low molecular weight is obtained. The olefines may be ethylene, propylene, or butylene, butadiene, isoprene, hexadiene, or dicyclopentadiene. A typical copolymer is ethylene, propylene, and dicyclopentadiene.  The copolymers may be made into curable latices, e.g. directly from the copolymer solution after it has been freed from catalyst residues and washed free of acid.  The latices may be compounded with known compounding ingredients such as carbon black, accelerators, antioxidants, plasticizers, extending oils, and pigments, and cured with sulphur or a peroxide.  The copolymers can be used in the manufacture of foams, films, coating compositions, rubberized fabrics and felts, floor coverings and road surfacing.  In Example II, a latex was made by dissolving potassium oleate and alkali in water at room temperature, and agitating the mixture at 5000 to 7000 revolutions per minute whilst adding a solution in n-heptane-benzene of an ethylene-propylene-dicyclopentadiene terpolymer, and subsequently concentrating the latex, and eventually finishing with a cream containing 55 to 60 dry weight per cent of the copolymer.  In Example III, a foam is made by adding to a latex of an ethylene-propylene-dicyclopentadiene copolymer containing vulcanizing ingredients a soap, beating the mixture into a foam, adding sodium silicofluoride and agitating until foam homogeneous, introducing foam into mould and curing by heating.  In Example IV a coating composition for making artificial leather consists of an ethylene-propylenedicyclopentadiene terpolymer latex, kaolin, ammoniacal casein solution zinc oxide, sulphur and accelerators.ALSO:Artificial leather is made by applying to a fabric support several layers of the following composition, an ethylene-propylene-dicyclopentadiene terpolymer latex, kaolin, zinc oxide, sulphur and accelerators, and vulcanizing the coating by passing the coated fabric under a heated embossing roller.
Patent GB-1145097-A (GB)
Title: Improvements in or relating to emergency support rings for tubeless motor vehicle tyres
IPC: B60C17/04
Filed: 1967-07-14
Abstract: 1,145,097. Pneumatic tyres. KRONPRINZ A.G. 14 July, 1967 [15 July, 1966], No. 32415/67. Addition to 1,138,731. Heading B7C. An emergency support ring for a tubeless tyre 2 comprises arcuate segments 3 of I section each secured to the rim 1a by a screw and carrying springs 6a spread by wedge portions 3f to press the tyre beads 2a against the rim flanges 1. During assembly of the segments to the rim, the springs are located and held by waisted parts 3g.
Patent GB-296601-A (GB)
Title: Improvements in or relating to typebar action for typewriters
IPC: B41J7/02
Filed: 1927-12-01
Abstract: 296,601. Spiro, C. Dec. 1, 1927. Type-lever actions.- An action of the kind comprising a sub-lever having a pin engaging a slot in the type-lever, or vice versa, is rendered noiseless by so arranging the pin and slot that the sub-lever ceases to transmit pressure to the typelever when the type-lever is in impression position. In the action shown in the Figure, the keylever 10 has pin-and-slot engagement 16 with a bell-crank 17 having an arm 18 connected by a horizontal link 20 to a short sub-lever 21 having a pin 25 engaging a slot 26 in the heel of the type-lever 22, the path of the pin 25 being parallel to the slot 26 in the initial and impression positions of the type-lever. On depressing the keylever, the type-lever is swung upwards, the speed increasing and decreasing in the first and second halves of the stroke respectively, and at the end of the stroke the pin 25 ceases to transmit pressure to the type-lever, the noise of impression being thereby reduced. The pin and slot cooperate to lock the type-lever in the normal position and to prevent rebound, a type-lever rest being dispensed with. The bell-cranks 17 are pivoted on a horizontal rod 19, and the arms 18 are formed of graded length to bring the links 20 into horizontal positions.
Patent GB-866410-A (GB)
Title: Improvements in and relating to polymerisable epoxide compositions
Inventor: PHILLIPS BENJAMIN
IPC: C08G59/42
Filed: 1958-10-11
Abstract: A polymerizable composition comprises divinylbenzene dioxide and a polycarboxylic acid compound in an amount having 0,3 to 1,25 carboxyl equivalents per epoxy equivalent; the composition may also contain a lesser amount of a polycarboxylic acid anhydride to the extent of 0,75 carboxyl equivalents per epoxy equivalent, the total number of carboxyl equivalents per epoxy equivalent being not greater than 1,25 The cured resins have the recurring units:- <FORM:0866410/IV (a)/1> where Y is a polycarboxylic acid residue.  Any of the o, m, or p-isomers of divinylbenzene dioxide, or mixtures thereof, may be used.  Suitable polycarboxylic acids include saturated and unsaturated di- and tri-carboxylic acids.  These may be wholly or partly replaced by polycarboxy polyesters prepared from polyhydric alcohols and excess polycarboxylic acid.  The polyhydric alcohols include glycols, oxyalkylene glycols, alkane diols, tri- and tetra-hydric and higher polyhydric alcohols, polyvinyl alcohol, and epoxide reaction products.  Examples are given of polycarboxylic acid anhydrides which may be used; these may also be saturated or unsaturated and include acid dianhydrides.  Acid catalysts may be added to the compositions, e.g. mineral acids, sulphonic acid and metal halide Lewis acids, and they may be in form of solutions in organic solvents.  The uncured or partially cured compositions may be dissolved in solvents such as xylene, methyl isobutyl ketone, ethyl-, butyl- and amyl-acetate and toluene, and applied as a coating composition which is subsequently completely cured.  The examples specify the following polycarboxylic compounds: adipic acid, an adduct of succinic anhydride (3 mols) with glycerol (1 mol), glutaric acid, an adduct of phthalic anhydride (2 mols) with ethylene glycol (1 mol), sebacic acid, a mixture of adipic acid and phthalic anhydride, a mixture of sebacic acid and maleic anhydride, a mixture of maleic acid and glutaric anhydride, a mixture of methyltetrahydrophthalic anhydride and an adduct of glycerol and succinic anhydride.  Also given for comparison are benzoic, acetic and butyric acids.
Patent GB-702038-A (GB)
Title: Improvements relating to automatic telephone or like systems
IPC: H04Q1/18
Filed: 1949-12-20
Abstract: 702,038. Automatic exchange systems. HADLEY, V. J., HADLEY, N. C., and KILMINSTER, S. A. Dec. 8, 1950 [Dec. 20, 1949], No. 32560/49. Class 40 (4) In an arrangement for operating a step-by-step switch potential - responsive means, which is connected to a point in a first potential divider progressively adjustable by the stepping of the switch, is also connected to a point in a second potential divider selectively adjustable by manually actuated calling switch means, and stops operation of the switch when the potentials at the two points are the same. The invention is described with reference to an automatic exchange in which the above arrangement is employed for setting a uniselector for selecting the called station. Operation of call finder A.- Each of the contacts 1 to 24 of bank A1 is connected to two resistors R25, R26 the former of which is individually wired to the corresponding station (ST3) whereas the latter is wired in multiple to change-over contacts 2a and thence via interrupter contacts A1 and relay 1 to +300V. D.C. At each station the wire from R25 can be grounded by the closure of the switch S1, ... S24 corresponding to the wanted station, whereupon relay 1 pulls up energizing drive magnet Aw, and Aw and 1 interact to step the switch A. When wiper RA1 reaches the contact of the calling line relay 2 operates and stops the switch. Operation of selector B.-When the calling line has been found a circuit is completed over contacts 2d and a number of resistances R1, ... R23 depending upon the switch S which has been operated so that the potential at point X is characteristic of the wanted station. This potential is applied over interrupter contacts B 1 to the grid of VI which has hitherto been at + 300 V. The resultant rise in anode potential is applied to the grid of normally cut off V2, which conducts, and relay 4 operates. Magnet Bw is energized and the opening of contacts B1 causes the grid potential of V1 to rise to that of its cathode. The resulting negative pulse on the grid of V2 cuts it off, 4 relapses and Bw is de-energised and switch B is stepped. The grounded wiper RB 1 progressively changes the potential of point Y at each step and thus reduces the cathode potential of VI until when the wiper reaches the contact of the wanted station the potential at Y becomes equal to that at X. The next closure of B1 produces no change in the anode current of V1 and the switch B is stopped. Release.-When the calling party restores the switch S, relay 2 releases followed by 1, and switch A homes to position 25 in which relay 3 is energized in series with 2 whereupon 1 releases. Relay 3 short-circuits 2 and prevents its operation. The initial release of 2 releases the normally operated relay 5 and -30 V. is thus applied to the grid of V1 to home the switch B to position 25 where 5 re-operates over wiper RB1 to stop the switch.
Patent GB-403795-A (GB)
Title: Improvements relating to gas heated water heaters
IPC: F24H9/12
Filed: 1932-11-18
Abstract: 403,795. Delivery arrangements for hot-water cylinders. RADIATION, Ltd., Thimble Mill Lane, Aston, Birmingham, and YATES, H. J., 15, Grosvenor Place, London. Nov. 18, 1932, No. 32586. [Class 64 (i).] To minimise dripping in a gas-heated water cylinder, a short syphon tube a is inserted into the upper end of the delivery pipe band provided with a cap or surrounding flange d. The top of the pipe is notched to form projections f on which the cap rests, and to connect the annular space e below the cap with the space c between the pipe and tube. Spring tongues g centre the tube within the pipe.
Patent GB-280059-A (GB)
Title: Improvements relating to the resolution of emulsions or suspensions containing tar or oil
IPC: C10C1/02
Filed: 1926-12-24
Abstract: 280,059. Robinson. H. W.. and Parkes, D. W. Dec. 24, 1926. Oils, recovering and purifying.-Aqueous emulsions or suspensions of oil or water-gas or like tar are resolved by making slightly acid, and mixing in a finely divided solid hydrocarbon which is soluble in the tar or oil and has a melting point over 100‹ C. When a sufficient! quantity of solid hydrocarbon, e.g. 15-20 per cent of naphthalene relative to oil, is initially present further addition is unnecessary. Emulsions may be rendered more suitable for treatment by blending, e.g. an emulsion of water-gas tar may be mixed with one containing creosote or like oil. In an example 800 lb. of creosote emulsion containing 256 lb. of water are heated with 100 lb. of crude naphthalene until the naphthalene dissolves completely; the mixture is made faintly acid by a mineral acid or a waste product containing it, and then rapidly cooled with stirring. The naphthalene crystallizes and agglomerates with the oil, and 225 lb. of water separates as an upper layer. Or 1600 lb. of tar oil emulsion con. taining 67 per cent of water and, reckoned on the oil, 20 per cent of naphthalene, is rendered slightly acid and heated and cooled as before. 890 lb. of water separate. Acidity may be produced by passing in carbondioxide, sulphur dioxide, or flue gases.
Patent GB-961382-A (GB)
Title: Porous pipe impregnation
IPC: F16L57/00
Filed: 1962-08-24
Abstract: 961,382. oil-impermeable pipes. STANDARD OIL CO. Aug. 24,1962 [Sept. 18, 1961], No. 32678/62. Heading D1P. A pipe is rendered oil-impermeable by impregnation with a quinoline-soluble coke-free petroleum resin produced by oxidation of a distillation residue of an aromatic extract from clarified cycle oil. The resin may be at 360 F. The pipe may be formed from cellulosic, asbestos, glass, or synthetic organic fibres. As shown, a plurality of pipes are evacuated in a vessel 12 by means of a pump 14, heated resin is admitted to vessel 12 from a vessel 26, and a nitrogen pressure is applied from a vessel 16. After impregnation, the pipes are quenched in a water vessel 37.
Patent GB-1147157-A (GB)
Title: Improvements in or relating to supports or linings of tunnels and shafts
Inventor: SWALLOW FREDERICK COLIN
IPC: E21D11/24
Filed: 1966-07-21
Abstract: 1,147,157. Tunnel linings. F. C. SWALLOW. 30 June, 1967 [21 July, 1966; 15 Dec., 1966; 16 Jan., 1967; 7 Feb., 1967], Nos. 32702/66, 56102/66, 2132/67 and 5671/67. Heading E1F. A lining for a shaft or tunnel comprises longitudinal members each formed by parts 2 nesting in parts 1, and struts 3 holding the longitudinal members evenly spaced about the curved periphery of the shaft or tunnel. The shaft or tunnel may have an arch shaped or circular section, and the struts may form rings or helices. Under excessive loads the struts are arranged to bow outwardly or telescope. Joints between parts 2 are midway between joint between parts 1 so that the parts 2 may extend in front of a completed section of lining to act as a support for the earth until a further section of lining is completed. The parts and struts of the lining may be formed of metals or plastics.
Patent GB-1443520-A (GB)
Title: Coding and decoding devices for electronic identification
IPC: G06K19/067
Filed: 1973-07-10
Abstract: 1443520 Credit cards and the like H WOLFLINGSEDER 10 July 1973 [19 July 1972] 32779/73 Heading B6A [Also in Divisions E2 and G4] A coded card comprises two outer layers of insulating material sandwiching a middle plate, shown unfolded about a line of symmetry 2 in Fig. 1, which bears electrically conducting patterns on its two surfaces, the conductor paths 8a, 8b of which lead from exposed contacts 7a, 7b at one edge of the plate to connections either with a common conductor path 9a, 9b on the same surface of the plate, or with a common conductor path on the opposite surface via holes 5a, 5b. These connections are those left after selective removal of separating points 3, 4 so as to establish a code in the conductor patterns of the card. The exposed contacts associated with the two common conductor paths have p.d.s. of +u and -u respectively applied thereto when plugged into a decoding circuit. This circuit, Fig. 3 (not shown), comprises two closed circuits (X), (Y) having pluralities of transistor pairs (T 1 ), (T 2 ), to form two NAND gates which are combined to form an AND gate via a transistor (T 3 ) so that only when the correct conductor patterns in the card are inserted in the circuit, are the correct voltages (+u), (-u), obtained at the circuit outputs (A), (B).
Patent GB-1191181-A (GB)
Title: Cyanoalkylaminoethyl Acrylates and Methacrylates and a process for their production
Inventor: MCFADDEN RUSSELL THOMSON
IPC: C09D133/06
Filed: 1967-07-18
Abstract: 1,191,181. Coating. DOW CHEMICAL CO. 18 July, 1967, No. 32915/67. Heading B2K. [Also in Divisions C2 and C3] In examples pine and steel panels are coated with compositions based on acrylic polymers obtained by copolymerising a compound of the formula: where n is an integer of 1 to 5, R is hydrogen or C 1-4  alkyl, and R<SP>1</SP> is hydrogen or methyl, or an inorganic acid salt thereof, with the acrylic base during the formulation of the composition. The acrylic polymer composition is based on acrylic and methacrylic acids and esters thereof and the above compound may be incorporated in an amount of 0.025-5 % by wt. Other conventional additives are also present, e.g. commercial preservatives, anti-foam agents, emulsifiers, ethylene glycol, polyethylene glycols, pigments and fillers.
Patent GB-648256-A (GB)
Title: Systems for radio-directing the movement of aircraft with respect to a predetermined path
IPC: G01S1/02
Filed: 1946-11-06
Abstract: 648,256. Radiolocation. REDIFFUSION, Ltd., and ADORIAN, P. Nov. 6, 1946, No. 32930. Drawings to Specification. [Class 40 (vii)] Relates to " talk-down " aircraft landing systems of the type in which the position of the aircraft relative to the required landing path is displayed at a ground radar equipment enabling a personal landing controller to direct the pilot of the aircraft by radio telephone. A radar equipment may comprise two separable units, i.e. an R.F. unit comprising aerial system, transmitter and R.F. stages of the receiver, and a display unit including the video and timing circuits and aerial control means the two units being coupled by cable or equivalent link ; the receiver I.F. stages may be located in either of the two units, the echo signals being then coupled to the display unit as R.F. or I.F. signals. According to the present invention a single display unit is located at the airfield control centre and a plurality of R.F. units are located permanently or temporarily on or adjacent different points of one or more runways, the R.F. units being coupled to the display unit by separate links and switching means being provided for selecting a particular R.F. unit. When cable links are employed and the R.F. units are transportable, the cables are terminated at the R.F. unit sites by coupling units facilitating connection to the R.F. units. In a particular embodiment for use on an airfield with three runways forming the sides of a triangle, three R.F. units are located respectively at the apices of the triangle so that landings may be controlled in either direction on any runway. The display unit may comprise four cathode-ray tubes, two for elevation and two for azimuth displays, and the positions of aircraft in the approach zone of the airfield may be displayed on an adjacent P.P.I. tube. The elevation and azimuth of the selected aerial system may be controlled by a servo system actuated by a single lever with two degrees of movement or the aerial may follow the aircraft automatically.
Patent GB-521060-A (GB)
Title: Improvements in or relating to pressure control systems for fuel injection pumps
IPC: F02M59/46
Filed: 1938-11-12
Abstract: 521,060. Fuel injection pumps. L'ORANGE, R. Nov. 12, 1938, No. 32974. Convention date, Nov. 13, 1937. [Class 102 (i)] A delivery valve of a fuel injection pump comprises a valve member A having a seating portion at each end. As the pressure builds up in the pump chamber the valve moves from its lower seating to the upper, during which time an initial delivery takes place and the main delivery takes place through the throttle passages F. The valve may be loaded by a spring. Fig. 2 shows an arrangement wherein the throttle passage F is provided in the valve member A. Specification 515,231 is referred to.
Patent GB-933141-A (GB)
Title: Dextromethorphan n-cyclohexylsulphamate
IPC: C07D221/28
Filed: 1961-09-14
Abstract: The invention comprises dextromethorphan N-cyclohexylsulphamate of formula <FORM:0933141/IV(a)/1> and a process for its preparation in which dextromethorphan is reacted with N-cyclohexylsulphamic acid in a solvent for the reactants.  Aqueous solutions of the above compound form anti-tussive compositions suitable for use in drop dosage form.
Patent GB-1419706-A (GB)
IPC: H01G4/30
Filed: 1973-07-11
Abstract: 1419706 Capacitors UNION CARBIDE CORP 11 July 1973 [12 July 1972] 33052/73 Heading H1M In manufacturing stacked ceramic capacitors the electrode layers 15 are formed by printing on green ceramic sheet material layers of an ink comprising oxidized palladium, the oxidized palladium having the constitution PdO x  wherein x is between 0À5 and 1. The risk of delamination of stacking and firing is stated to be reduced.
Patent GB-1128588-A (GB)
Title: Flat bed trailer construction
IPC: B62D53/06
Filed: 1967-07-19
Abstract: 1,128,588. Vehicle floors. CRANE FRUEHAUF TRAILERS Ltd. (Fruehauf Comp.). 19 July, 1967, No. 33078/67. Heading B7B. A vehicle floor comprises a number of planks 28 recessed on their underside edges to engage the outturned flanges 50, 52 on the longitudinals 40. The planks 28 are also supported by the transverse members 58 which pass through apertures in the longitudinals 40 and are welded thereto.