baber/WOPTO huggingface dataset:
Patent GB-719098-A (GB)
Title: Improvements in or relating to low temperature polymerization process
IPC: C08F210/12
Filed: 1952-02-19
Abstract: An iso-olefin having 4 to 8 carbon atoms is copolymerized with a straight or branched chain poly-olefin having from 4 to 12 carbon atoms at a temperature between -20 DEG C. and -165 DEG C. using as catalyst zirconium tetrachloride complexed with an organic ether.  1 to 3 volumes of an inert, low freezing solvent may be used. Iso-olefins specified are 2-methyl-pentadiene-1, 3, 2-methyl-butene-1, 2-methyl-pentene-1, 2-methyl-hexene-1 and, in particular, isobutylene.  Diolefins which may be used are isoprene, butadiene, piperylene, dimethyl butadiene, dimethallyl and myrcene. Ethers used in forming the catalyst complex are dimethyl, diethyl, di-n-propyl, di-isopropyl, dibutyl, diamyl, dihexyl, di-octyl, diphenyl, b , b 1-dichloro-ethyl, a , a 1-dichloroethyl, 1, 2-diphenoxy ethane, o-chloro-phenyl ethyl, b -chloro-ethyl phenyl and dichloromethyl ethers, diethylene oxide and anis le and its derivatives.  Inert solvents which may be used are carbon disulphide, methyl chloride or bromide, dichloromethane, ethyl chloride, propane, butane and propane.  The process may be continuous or batchwise and the reaction mixture may be cooled by a refrigerant-diluent, such as liquid propane, ethane, ethylene or methane, or by solid carbon dioxide.  The catalyst may be quenched at the end of the reaction with methyl, ethyl, or isopropyl alcohol, acetone, ammonia or an amine, and the products may be compounded with vulcanizing agents, fillers or stabilizers.  The interpolymers obtained may have a molecular weight between 20,000 and 100,000 and an iodine number between 55 and 175.  Specification 719,097 is referred to.
Patent GB-1498263-A (GB)
Title: Device for connection to a fluid-conveying line
IPC: B23B51/04
Filed: 1975-01-31
Abstract: 1498263 Drilling and tapping pipes A J M KAGAN 31 Jan 1975 [18 Feb 1974 13 Dec 1974] 4381/75 Heading B3C [Also in Division F2] A device for tapping a pipeline to form a side branch comprises a body member 11 adapted at one end via clamping elements 14, 15 for securing to a pipeline and at a second end for securing to a branch pipe; the body having a passageway 12 wherein a tubular saw-toothed poriton of a rotatable tool 20 is received to contact the pipeline and bore a communication hole therein. The body member may include a plug cock 31 (Fig. 1) and flanged saddle clamps 14, 15 exhibit stepped portions 26, 27 to accommodate a range of pipe sizes. A cradle member 30 having a sealing member 28 wherein the drill portion is received effects sealing of the junction, and the tubular drill portion of the tool-preferably of steel, is configured with an inner cylindrical and outer frusto-conical surface or vice-versa and bevelled teeth to ensure that the drilling pellet is returned within the tool. An alternative embodiment (not shown) differs in that a stopcock is not formed integral with the body, but is a separate member incorporating a drilling portion of the tool described and adapted to be screwed into the body to provide for a side branch.
Patent GB-913832-A (GB)
Title: A process for the production of unsaturated nitriles
IPC: B01J27/186
Filed: 1960-02-08
Abstract: Catalysts for use in preparing acrylonitrile from mixtures of propylene, oxygen and ammonia, and comprising a combination of at least two members selected from cupric oxide, vanadium pentoxide, molybdenum trioxide, tellurium oxide, bismuth oxide and phosphomolybdic acid, as well as optional substances, such as iron oxide, selenium, selenium oxide, metal selenites and alkali metal salts, and carrier materials, such as silica gel, pumice stone, diatomaceous earth, clay, quartz, porcelain, alumina, bauxite, magnesia, magnesite, titanium oxide, silicon carbide, graphite, kaolin and bentonite, are prepared by admixing the components in the presence of sufficient water to make a paste, followed by calcining. The phosphomolybdic acid may be admixed in the form of its ammonium salt.  Specifications 723,003 and 867,438 are referred to.ALSO:Acrylonitrile is prepared by catalytically reacting propylene at a temperature of 250 to 480 DEG C. with a mixture containing 0.5 to 10 moles of oxygen and 0.1 to 5 moles of ammonia per mole of propylene, in the presence of a catalyst which includes a combination of at least two members selected from cupric oxide, vanadium pentoxide, molybdenum trioxide, tellurium oxide, bismuth oxide and phosphomolybdic acid.  Other substances which may be present in the catalyst are iron oxide, selenium, selenium oxide, metal selenites, alkali metals, alkali metal salts and carrier materials such as silica gel, pumice stone, diatomaceous earth, clay, quartz, porcelain, alumina, bauxite, magnesia, magnesite, titanium oxide, silicon carbide, graphite, kaolin and bentonite. Diluent gases such as air, nitrogen, gaseous paraffin or steam may be present during the reaction.  Specifications 723,003 and 867,438 are referred to.
Patent GB-271144-A (GB)
Title: Improvements in or relating to discharge tubes having an enclosed arc discharge
IPC: H01J17/20
Filed: 1926-02-16
Abstract: 271,144. Wade, H., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Feb. 16, 1926. Low-pressure metallic-vapour apparatus; are lamps; arc-lamp electrodes.-In rectifiers having an enclosed arc discharge between an incandescent-oxide solid cathode and a cold solid anode and having a filling of rare gas, for example, as described in Specification 227,407, a vapour with an ionization voltage lower than that of the rare gas is introduced into the filling to reduce the starting potential of the arc and so the energy loss in the series resistance compensating for the difference between the starting and maintaining potentials. The filling may be argon mixed, and preferably saturated, with mercury vapour. A drop of mercury may be introduced into the tube. The rectifier may be used for charging accumulators from alternating-current systems.
Patent GB-1162428-A (GB)
Title: Improvements in or relating to Apparatuses for Digital Measurement of Distances by Means of Ultrasonic Pulses
IPC: G01S7/52
Filed: 1967-01-30
Abstract: 1,162,428. Ultrasonic distance measurement. REALISATIONS ULTRASONIQUES. 30 Jan., 1967 [8 Feb., 1966], No. 4511/67. Heading H4D. In a system providing a digital measurement of the separation of two points in a medium by counting clock pulses in the interval between transmission of an ultrasonic pulse from the first point and reception of the echo obtained by reflection of this pulse at the second point, the measurement is made independent of variations in the ultrasonic wave propagation velocity by making the clock pulse frequency the frequency defined by an acoustical resonance phenomenon in a space of predetermined length within the medium. In the embodiment of Fig. 2, clock pulses from generator 16 are passed to counter 15 for a time determined by receivercontrolled gate 14 and the separation of transmitting/receiving transducer 11 from a reflecting surface S is indicated directly on unit 17. A transducer pair A 0  separated by a sample of the medium or in the medium itself provides an acoustic feedback path for an amplifier in generator 16 to define the clock pulse frequency. If the wave propagation velocity varies with distance along the propagation path between transducer 11 and the surface, transducer pair A 0  and further pairs A 1 , A 2  . . . are sequentially connected to the amplifier during the pulse propagation interval to give a sequence of different clock pulse frequencies related to the different propagation velocities in respective successive portions of the said propagation path. Auxiliary receiving transducers T 1 , T 2  . . . disposed at different distances from transducer 11 detect the ultrasonic pulse propagating between transducer 11 and the surface and provide timedisplaced trigger signals which actuate commutating circuits C 0 , C 1 , C 2  . . . to effect the sequential connection of the transducer pairs A 0 , A 1 , A 2  . . . to the amplifier.
Patent GB-662164-A (GB)
Title: Improvements in or relating to pharmaceutical materials
IPC: C08F8/44
Filed: 1949-02-18
Abstract: A synthetic resinous cation-exchange material is prepared by polymerizing a mixture of a monovinyl aryl compound, particularly styrene, and a polyvinyl aryl compound, particularly divinyl benzene, containing not more than 5 per cent by weight of the polyvinyl aryl compound, sulphonating the polymer and charging with ammonium ions. Specification 577,707 is referred to.
Patent GB-886949-A (GB)
Title: A process for the preparation of vaccines from tissue cultures against infectious hog paralysis
IPC: A61K39/13
Filed: 1960-02-09
Abstract: A vaccine against infectious hog paralysis is obtained by inoculating pig kidney cultures in a suitable medium with poliomyelitis serum virus subtype konratice, purifying the virus yield by treatment with chloroform and adsorbing the thus purified virus on aluminium hydroxide.  For the preparation of a dead vaccine, the virus is given 80-120 serial passages prior to the chloroform and adsorption treatment and is then inactivated with formaldehyde.  In the case of a live vaccine for oral and parenteral use, at least 300 serial passages are required prior to the chloroform and adsorption step. The virus medium for the pig kidney tissue is pure bovine amniotic fluid.
Patent GB-395069-A (GB)
Title: Improvements in or relating to electromagnetic switches or circuit breakers
IPC: H01H71/24
Filed: 1932-02-16
Abstract: 395,069. Electromagnetic switches; automatic circuit breakers. ALLGEMEINE ELEKTRICIT€TS-GES., 2, Friedrich Karl-Ufer, Berlin. Feb. 16, 1932, No. 4621. Convention date, Feb. 18, 1931. [Class 38 (v).] Springs, arrangement of.-An electromagnetic excess-current switch has a contact lever 7 which is moved in the opening direction as the result of an impact on it of an armature 2 which is moved magnetically on excess current and just previously, or simultaneously, actuates mechanism which acts to obstruct the contact lever 7 on its return movement (in the closing direction) and to hold it fast in the open position. On the attainment of a given load current, a magnet 5 overcomes the action of a spring 29 and holding-magnet 3, which is saturated at the nominal current, to attract the armature 2 which, in its movement, strikes the contact 7 and rotates it counterclockwise about its pivot 11, thereby opening the circuit and tensioning a spring 17. Almost simultaneously, a lever 14 is rotated about the pivot 11 to rotate a latch arm 13 about its pivot 23, thereby releasing the actuating lever 26 which is moved clockwise by the tensioned spring 17. A lever 15 pivoted to the handle 26 at 24 is provided with a stop 18, which engages a roller 20 on the contact-lever 7 and prevents the latter from being restored to the closed position by the spring 17. A further stop 19 on the lever 15 serves as a " half-open " stop in case the impact is insufficient to rotate the lever 14. To reclose, the lever 26 is moved to the left pulling with it the levers 15, 7, and when the latter is in the closed position, the stop 18 leaves the roller 20 and the spring 17 is further tensioned until the handle 26 is latched at 13, 27. The lock 13, 27 may be released by thermal or electromagnetic means and the lever 26 may be in two normally-connected parts forming a free-handle arrangement.
Patent GB-1058272-A (GB)
Title: A process for the polymerization of olefins
IPC: C08F10/00
Filed: 1964-02-04
Abstract: Olefines are homo- or co-polymerized using a catalyst system comprising (1) a hydrocarbon-insoluble reaction product formed from a compound of a transition metal selected from metals of Groups IVa, Va, VIa and VIII (Mendeleef), and manganese and an organometallic compound of an alkali metal, alkaline earth metal, zinc, cadmium, aluminium, or rare earth metal, and (2) an organo-cadmium compound and optionally (3) a substance selected from organo-polybasic acid esters, esters of carboxylic acids with polyhydric alcohols and polysiloxanes.  The polymerization may be carried out in a solvent and hydrogen may be employed to regulate the molecular weight of the product.  In the examples, the catalysts employed are as component (1), the reaction product of diethylaluminium monochloride and titanium tetrachloride, as component (2) diethyl cadmium and optionally as component (3) one of the following: dimethylpolysiloxane, rape seed oil, diphenylpolysiloxane, dioctyl phthalate and glyceryl tristearate and the monomers polymerized are (a) ethylene optionally in the presence of hydrogen, (b) propylene, (c) butene-1, (d) ethylene plus propylene optionally in the presence of hydrogen and (e) styrene in the presence of hydrogen.
Patent GB-433618-A (GB)
Title: Improvements in blades of screw propellers, screw fans and screw pumps
IPC: F04D29/32
Filed: 1934-02-13
Abstract: 433,618. Screw propellers. CARIDROIT, J., and SOC. S.C.E.M.M.I.C., 10, Rue de la Pepiniere, Paris. Feb. 13, 1934, No. 4722. [Class 114] Screw-propeller blades 3 are formed by a generatrix which is an involute of the circle of radius r, the foot of the generatrix being moved along a helix a, b on the boss 2 and at the leading and trailing edges lies in planes perpendicular to the axis 1.
Patent GB-676953-A (GB)
Title: Improvements in electrostatic generators
IPC: H02N1/12
Filed: 1951-02-27
Abstract: 676,953. Electrostatic generators. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 27, 1951 [March 16, 1950], No. 4758/51. Class 35. An electrostatic generator having a constant output voltage comprises a rotary insulating drum 2 charged from an exciting supply through corona brushes 3, 4, and delivering charge at an increased potential to a third corona brush 6 at a part of the drum having a lower capacity to earth. The inside of the drum is charged by brush 3 which is opposite an earthed plate 1 situated close outside the drum so that a large capacity is produced at this point between the drum and earth. The outside brush 4 which is opposite an earthed cylinder 5 placed close inside the drum for the same purpose, serves to prevent the accumulation on the outside of the drum of positive charge induced by the negative working charge within the drum. Electronic means are described for regulating the output voltage of the generator by comparing it with a fixed reference voltage and controlling the excitation voltage accordingly.
Patent GB-608102-A (GB)
Title: Improvements in or relating to bales and like packages
IPC: B65D71/04
Filed: 1946-02-15
Abstract: 608,102. Protecting materials in bales. MALTHOUSE, E. G. Feb. 15, 1946, No. 4780. [Class 94(i)] A combination of a bale-tie and stiffeners for protecting the edges of packaged material comprises a. separate stiffener for each edge of the bale embraced by the tie, each stiffener being of angular form and provided with means for locating it on the tie so that a stiffener may be positioned on the tie at each edge of a bale embraced thereby. A sheet metal stiffener 10, Fig. 1, is bent at right-angles forming two arms 11 engaging the edge of the bale 12. Each arm 11 has a loop 14 punched out to locate a loop tie 15. The tie may be threaded through the loop, or the loop may have a slit 16 through which the tie can be slipped. The stiffeners may be assembled on the tie before it is applied to the bale, being then positioned at the edges before the tie is tautened. One stiffener may serve more than one tie, and stiffeners may overlap one another. A stiffener may be adapted to fit at the corner of a bale, by means of a gusset 20, Fig. 7, joining the arms 11. The arms 11 may be provided with split loops 25 to locate a cord tie 24, and lugs 26 punched from the arms to anchor the ends of the cord.
Patent GB-509751-A (GB)
Title: A method of and apparatus for flanging the edges of planiform workpieces
IPC: B21D19/08
Filed: 1939-02-14
Abstract: 509,751. Flanging. JUNKERS' FLUGZEUGUND-MOTORENWERKE AKT.-GES. Feb. 14, 1939, No. 4827. Convention date, Feb. 16, 1938. [Class 83 (iv)] In a machine for flanging a flat workpiece means is provided for bending over the flange step by step and for pressing the flange in the direction of the periphery to prevent the formation of wrinkles. The workpiece 3 secured to a template 4 is positioned and clamped by a member 6, actuated by a cam 8, against an abutment 5. A cam 11 then raises a member 13 to bend the edge of the workpiece to the position shown in Fig. 2 and to locate a pressure member 15 in alignment with the flange and a similar pressure member on the abutment 5. The pressure members have V- faces co-operating with pressure pads, Fig. 3, not shown. Axial movement of the members 15 when a toggle 20, 23 is straightened by a cam 16 results in an ironing motion of the pressure pads in the direction of the periphery to prevent wrinkles. In a modification Fig. 4, not shown, a press head descends to effect flanging, an inclined face causes the pressure against the flange and arcuate members iron the wrinkles. In a further modification, Fig. 8, not shown, a hand operated clamp is pivoted to effect the step by step flanging. The swinging motion is arrested and further pressure on a hand lever actuates V-faced pressure pads to prevent wrinkles.
Patent GB-1358272-A (GB)
Title: Production of esters of carboxylic acids
IPC: C07C69/24
Filed: 1971-02-18
Abstract: 1358272 Esters IMPERIAL CHEMICAL INDUSTRIES Ltd 22 Dec 1971 [18 Feb 1971] 4924/71 Heading C2C Esters of carboxylic acids are prepared by transesterification of an aliphatic acid (6-11 C) ester with a polyol in the presence of an alkali metal salt of a phenol. Sodium or potassium salts of hydroxybenzene, a cresol or a xylenol are mentioned and an alkyl (1-6 C) ester, e.g. methyl or ethyl ester of an acid prepared by the reaction of an olefine with carbon monoxide and an alcohol may be used. Ethylene glycol, neopentyl glycol, trimethylol propane or pentaerythritol may be the polyol, and examples describe the preparation of mixed pentaerythritol and trimethylol propane nonanoates, trimethylol propane octanoate, mixed di-iso-octyl esters of adipic, succinic and glutaric acids, and pentaerythritol tetraheptanoate.
Patent GB-911505-A (GB)
Title: Semiconductor devices
IPC: H01L29/73
Filed: 1960-02-12
Abstract: 911,505. Transistors. WESTINGHOUSE ELECTRIC CORPORATION. Feb. 12, 1960 [Feb. 26, 1959], No. 4996/60. Class 37. A junction transistor, e.g. of germanium, silicon, germanium-silicon alloy or silicon carbide, comprises a wafer of one conductivity type forming a base zone, a collector zone of the opposite conductivity type adjacent and coextensive with one face of the wafer, an emitter zone of said opposite type disposed near the edge of the opposite face and a single base contact mounted centrally thereon. In the Fig. 6 embodiment comprising a circular N- type germanium base wafer 8, annular emitter 12 and collector 10 are formed by alloying or diffusing acceptor impurity into the wafer. Base contact 18 of lead-tin alloy preferably doped with antimony is reinforced by a steel, nickel, or east-iron backing. The device is soldered with indium, lead-tin or indium-tin to a case 20 mounted on a heat sink. In an alternative embodiment using a rectangular wafer the emitter and base contact are shaped as shown in Fig. 7. The illustrated configuration has the advantage over the conventional layout in which the positions of base and emitter are transposed of greater effective emitter and collector area, and reduction in the maximum emitter-base distance.
Patent GB-1271630-A (GB)
Title: Improvements in or relating to wire coil packages
IPC: B65H49/02
Filed: 1969-10-13
Abstract: 1,271,630. Packages of wire. NATIONALSTANDARD CO. 13 Oct., 1969 [31 Oct., 1968], No. 5002/71. Divided out of 1,246,828. Heading B8M. A wire coil package comprising wire wound in adjacent convolutions and with overlapping layers extending from the inside diameter to the outside diameter of the coil is characterized in that the convolutions have a cast diameter greater than the outside diameter of the coil, the wire of the coil has one twist per convolution, at least part of the wire is under tension and the outer end of the wire is fixed to prevent uncoiling. The package may be sandwiched between end walls, one of which has a centre opening through which the wire may be pulled. An outer magnetic metal sheet wrapper extends circumferentially around the coil and extends radially inwardly over the end walls to hold these walls in engagement with the package. The cast may be in the range 40 inches to 60 inches and the outside diameter of the coil may be 22 inches.
Patent GB-321892-A (GB)
Title: An improved diaphragm valve
IPC: F16K7/12
Filed: 1929-02-14
Abstract: 321,892. Saunders, P. K. Feb. 14, 1929. Diaphragm valves.- An improved diaphragm valve comprises a casing 1 having substantially straightthrough passages 2 which curve up to a central weir 4 provided with a concave upper surface with rubber inset 12 which forms part of the seating. for the valves. The D- shaped ports on either side of the weir have integral grids 27 with stream-lined webs to support the diaphragm in its closed position. In its open position, as shown, the diaphragm is supported by sets of curved fingers 22, and the diaphragm is forced to its seating by a member having convex fingers 13<2> which pass through the gaps between the support fingers 22. The sleeve spindle 15 is provided with an adjustable, stop 23 to limit the downward pressure of the forcing members 13<2>. The diaphragm 6 is made of reinforced rubber, the threads of the fabric being crossed in successive layers and the rubber coating being made thicker on the lower or closure side. A space 29 beneath the weir can be utilized for storage purposes, and the casing may be lined with indiarubber or lead, or other non-corrosive material.
Patent GB-276384-A (GB)
Title: A new or improved dish, tray, container, or receptacle for fruit, food and other articles
IPC: A47G19/02
Filed: 1926-02-23
Abstract: 276,384. Maddock, W. E., and Maddock, G. G. Feb. 23, 1926. Trays. - Dishes, trays. or other handled containers or receptacles for fruit, food, or other articles are provided with a slot or opening c below the handle b to facilitate stacking.
Patent GB-433315-A (GB)
Title: Improvements in and relating to steel shafts for golf clubs
IPC: A63B53/12
Filed: 1934-02-16
Abstract: 433,315. Golf club shafts. SMITH, W., 17, Hertford Avenue, East Sheen, London. Feb. 16, 1934, No. 5171. [Class 132 (ii)] A tubular steel shaft for golf clubs is provided with two weighty collars or enlarged annular portions integral with or secured upon the exterior of the shaft for diminishing whip and insulating vibrations. In the construction shown in Figs. 1 and 3, collars b and c of truncated conical form are secured to the upper and lower portions of the handle portion of the tapered tubular carbon steel shaft a by grub-screws d, welding or brazing. A wrapping e of rubber or leather is provided and the handle of the shaft may be closed by a hickory cap or plug g. In the construction shown in Fig. 4, the collars band c are integral with the shaft a the bore of which is constant. In the construction shown in Fig. 5, the attached collars band c are approximately cylindrical with their ends nearer to the striking head suitably rounded off. The shaft a may taper for only part of its length adjacent the striking head. An additional collar c<1>, Fig. 1, may be adjustably secured to the shaft a by a grub-screw d. According to the Provisional Specification the edges of one or both of the truncated conical shape collars are preferably bevelled or rounded off.