baber/WOPTO huggingface dataset:
Patent GB-970849-A (GB)
Title: Plutonium oxide spheres and method of making
IPC: C01G56/00
Filed: 1963-09-16
Abstract: 970, 849. Plutonium compounds; fuel elements. UNITED STATES ATOMIC ENERGY COMMISSION. Sept. 16, 1963 [Oct. 5, 19621.No. 36318/63. Headings G6C and G6R.  A method of forming spheres containing plutonium oxide and substantially free of contamination, comprises segregating particles containing plutonium oxide of a selected size range, injecting the particles into a high temperature plasma torch zone to heat the particles rapidly to a temperature above their melting point, passing the product through the zone and then through a gas zone, and capturing the product. In one example sintered plutonium oxide fillets are ground into small particles and segregated by screening into sizes varying from 35 mesh to 400 mesh. The particles are placed in a receptacle 24, Fig. 1, and pass through a tube 23 to a plasma zone 20 where they melt to form spheres of sizes ranging from 15 to 250 microns in diameter. The spheres cool in an air zone 29 and are captured in a beaker 30 which may contain water. The gas in the tube 11 may be argon and preferably includes 25% oxygen to prevent reduction of the plutonium oxide to lower oxides. The gas is heated by a coil 17 energized by a radiofrequency generator to form the plasma zone. In an alternative apparatus, Fig. 3 (not shown), suitable for producing smaller spheres of about 10 microns diameter, the particles are introduced through a side tube situated below the heating coil so that they pass into the lower end of the plasma zone, and a collecting flask abuts the lower end of the tube containing the plasma. In another example the desired product is a plutonium-bearing glass containing about 10% by weight of plutonium. Ground glass is mixed with plutonium oxide and melted, and then ground into fine particles before being fed to the plasma zone. Alternatively plutonium oxide is combined in a solid state solution with other oxides such as UO 2 , ZrO 2  or Y 2 0 3 ; for example the solution may contain 10-20% UO 2  and 90-80% Pu0 2 . The spheres may be used as fuel in a nuclear reactor or as alpha particle sources, and since they are free from loose contamination they may be handled in an open room without protective devices such as respirators.
Patent GB-1377859-A (GB)
Title: Digital integrated circuits
IPC: H01L21/822
Filed: 1972-08-03
Abstract: 1377859 Integrated circuits I CATT 13 July 1973 [3 Aug 1972] 36365/72 Heading H1K In a digital integrated circuit comprising a plurality of undiced regions in a semi-conductor wafer, each region containing a digital storage or processing circuit including means for transferring information and control signals from at least one set of input electrodes to one of a plurality of sets of output electrodes selected by a logical switching circuit included in the digital circuit, the sets of output connections being connected to sets of input connections of a plurality of neighbouring regions, the logical switching circuit of each region is responsive to certain of the control signals to change the selected set of output connections. The regions are preferably identical and may be intended to be eventually separated by dicing to form individual integrated circuits. In this case the selective interconnection arrangement permits testing of individual circuit regions by the channelling of testing signals through a chain of previously tested "good" circuit regions, "bad" circuit regions being excluded from the chain. Preferably the chain has, as far as possible, a spiral form. Instead of dicing the fully tested wafer it may be left complete, the interconnected chain of "good" circuit regions forming a shift register. In the event of a fault developing the chain may be reformed after further testing. The circuit regions may lie in a conventional square array, but other lay-outs in which each region has six immediate neighbours are described. Detailed logic circuit systems for performing the necessary interconnection selection processes are described at length in the Specification.
Patent GB-866586-A (GB)
Title: Method of preparing gas mixtures of known composition
Inventor: ARMOND JOHN WALTER
IPC: B01F23/10
Filed: 1958-11-13
Abstract: <PICT:0866586/III/1> Binary gas mixtures suitable for calibrating gas analysers are prepared by mixing one of the gases with a mixture of known composition of the other of said gases with an auxiliary gas, determining the concentration of the auxiliary gas in the resultant ternary mixture and removing the auxiliary gas from the latter mixture.  The invention may be applied to the production of mixtures of methane or other hydrocarbon with a rare gas or of nitrogen or other inert gas with argon or other rare gas, nitrogen/argon being exemplified in relation to the embodiment illustrated in the drawing. Commercial grade argon is passed through a safety valve 21, vessel 1 containing manganous oxide (to remove oxygen), phosphorus pentoxide tube 5 (to remove water), cooled tube 6 containing a molecular seive zeolite (to remove nitrogen), a metering section containing a water lute 13 and capillary tube 12 and a fine adjustment valve 15 by which it is introduced into a stream of air (or other nitrogen/oxygen mixture of known composition) under pressure controlled by water lute 14 and the amount of oxygen in the mixture is determined in galvanic cell oxygen analyser 20.  The ternary gas mixture then passes to manganous oxide tube 16 to leave the desired binary nitrogen/argon mixture, the composition of which can be calculated. Specification 785,302 is referred
Patent GB-1189339-A (GB)
Title: Improved Digital-Analog Control System Employing Solid State Digital Potentiometer
IPC: F01D17/24
Filed: 1967-08-09
Abstract: 1,189,339. D/A converters. WESTING- HOUSE ELECTRIC CORP. 9 Aug., 1967 [19 Aug., 1966], No. 36599/67. Heading G4H. A control system for Controlling a member, e.g. a turbine, includes a resistance network 81 (Fig. 2) the resistances of which are selectively connected under the control of transistors T1- T14 on the output leads of a counter 76 between a voltage source 70 and an output terminal 73 to vary the amplitude of the signal at the terminal 73 in accordance with the count in the counter 76. The signal 73 is combined at 74 with a feedback signal representing the actual state of the member, the resultant error signal being fed by an operational amplifier 18 to control the member. In the embodiment described, the required state of the turbine is entered into a counter in logic circuitry 40 (Fig. 1) and after a short pulse, pulses at a preselected frequency are fed on one of two leads 46 48 (for positive or negative accumulation in the counter 76 (Fig. 2)) until the counts in the two counters are equal. The frequency at which the pulses are supplied determines the acceleration of the turbine. The error signal from amplifier 18 is fed to valve position control 16 (Fig. 1). The preset state or the actual state of the turbine may be displayed. The counters are preferably binary coded decimal.
Patent GB-435158-A (GB)
Title: Carburettors for internal combustion engines
IPC: F02M9/06
Filed: 1934-12-21
Abstract: 435,158. Spray carburetters. BROKEL, O., 27, Jordanstrasse, and REINCKE, R. M., 3, Baumwall, both in Hamburg, Germany. Dec. 21, 1934, No. 36767. Convention date, Dec. 22, 1933. [Class 7 (iii)] In a carburetter in which a hand-operated piston valve 10 controls the air inlet and is associated with a needle valve 9 which regulates the fuel discharged from a nozzle 3, the fuel being supplied through a felt pad 5 or like member, a holder 23 having a projection on which the pad is secured is formed with branch passages 8<1> leading from the pad to a central passage 8 containing the needle 9 and the projection widens out at its base, a bevelled rib 4 on the holder being disposed in the air passage and having a top surface which slopes downwards towards both ends. The entrance to the air passage is rectangular and merges into a circular cross section adjacent the piston valve 10. A gauze 7 prevents material from the pad 5 from entering the passages 81 and a nut 6 on an extension of the holder 23 serves to adjust the pressure on the pad. At the lower end of the piston valve 10, a passage 25 is cut corresponding in cross section with the rib 4 but having lower faces which slope upwards from the centre to the ends, and slots in the piston guide screw controlled choke plates 13 for adjusting the size of the air passage. The needle and piston valves are carried on a bridge piece 18 raised or lowered by links 16 pivoted to sectors 15. A control rod turns the sectors 15 about pivots 17 with varying leverage according to the position of the piston valve.
Patent GB-908846-A (GB)
Title: Method of passivating a silicon semiconductor surface
IPC: H01L21/00
Filed: 1960-10-27
Abstract: 908,846. Semi-conductor devices. PACIFIC SEMICONDUCTORS Inc. Oct. 27, 1960 [Jan. 4, 1960], No. 36995/60. Class 37. A silicon semi-conductor body is protected from moisture and undesirable impurities by forming an oxide layer on its surface and then treating the oxide layer with an esterifying agent. Particularly suitable esterifying agents suggested are methyl and ethyl alcohols, trimethylmethoxysilane, triethylethoxysilane, and trivinylethoxysilane but many others are mentioned. Diodes protected in this way are made by the following steps. Boron is first diffused into one surface of a 40 ohm. cm. N-type silicon wafer to form a junction therein. The diffused surface is masked, a grid of lines scribed through the masking, and the surface exposed to an etch until the lines extend through the junction to provide a series of discrete P-type mesas. After removal of the masking the wafer is heated at 1000‹ C. for 2 hours in oxygen at ¥ of an atmosphere pressure to produce a silicon dioxide film 1000-10,000 Š thick. After removal of the film from the upper and lower surfaces the wafer is broken up along the lines into separate PN elements to which gold-plated nickel ribbons 40, 41 (Fig. 6) are then welded. The elements are next placed on quartz wool 51 in tube 50 which is evacuated via tube 55. During this process the methylmethoxysilane is frozen in container 62 by liquid nitrogen 66. The liquid nitrogen is moved to surround base of tube 50 so that the silane distils over to form pool 70. The tube is then sealed off at 72, mounted in an autoclave containing the silane to equalize the internal and external pressures on the tube and heated to 250‹ C. for 16 hours, during which the pressure in the tube is 200- 350 p.s.i. The final protective layer 90 (Fig. 6) is subsequently formed by the method described in U.S.A. Specification 2,913,358. As an alternative the oxide film is formed by a process identical to that used in the esterification step except that deionized water is used in place of the silane. A theoretical explanation of the esterification process is given in terms of the reaction with hydroxyl ions of water atoms trapped on the surface.
Patent GB-619612-A (GB)
Title: Improvements in or relating to electrical frequency controlling devices
IPC: H02P9/04
Filed: 1946-12-16
Abstract: 619,612. Automatic control of frequency; systems depending on two machines. GENERAL ELECTRIC CO., Ltd., and FRIEDLANDER, E. S. Dec. 16, 1946, No. 37015. [Class 38 (iv)] [Also in Group XXXVII] A constant frequency supply 6 is obtained from the motor-driven rotor 4 of an inductiontype frequency changer having its stator 2 fed from a variable-frequency source 3, the speed and direction of rotation of the rotor being automatically controlled by means responsive to the output frequency of the machine to correct frequency deviation. The rotor may be driven through a worm 8 by a D.C. motor 9 having a field winding 10 constantly energized from the source 3 through a rectifier 12, the armature being energized through a rectifier 14 and reversing switch 15 from a continuously variable autotransformer 13 fed also from the source 3. The transformer ratio and switch position are governed by a cam disc 21 and arm 19 which may be driven by a reversible splits phase motor 22 controlled by a frequencyresponsive relay 30 of the watt-metric type energized from the supply 6 through a constant voltage transformer 7 and associated with a circuit 33, 34, resonating at the normal frequency of that supply. At normal frequency the driving system of the relay provides no torque, but frequency deviation results in a torque which varies in direction in accordance with the direction of deviation, this torque closing appropriate contacts in the normally deenergized circuit of motor 22 to start the motor running in a direction to cause the rotor-driving motor 9 to correct the deviation. In a modified arrangement two pole-changing induction motors replace the D.C. motor 9, the appropriate motor and its pole number being selected by a cam switch controlled by the frequency responsive relay. The motors are reversible and provide, in all, four different speeds.
Patent GB-1459337-A (GB)
Title: Process for polymerizing monomers
IPC: C08F2/40
Filed: 1974-08-23
Abstract: 1459337 Polymerization process B F GOODRICH CO 23 Aug 1974 [27 Aug 1973] 37045/74 Heading C3P Polymer build-up on reactor surfaces is prevented by coating the surfaces with a polyethyleneimine and including in the polymerization medium an inorganic, water-soluble, divalent tin salt. The polyimine is applied in aqueous solution, preferably with a curing agent such as formaldehyde. The process is exemplified by a vinyl chloride aqueous suspension polymerization in the presence of stannous chloride.
Patent GB-818416-A (GB)
Title: Absorbent non-woven, bonded-fibre fabric
IPC: D04H1/66
Filed: 1955-12-28
Abstract: 818,416. Bonded fibrous fabric. SPAHR, R. J., SUMNER, J. K., and YEDLICK, E. J. Dec. 28, 1955 [Dec. 28, 1954], No. 37169/55. Drawings to Specification. Class 140. A non-woven fabric comprises a loosely assembled web of over-lapping intersecting fibres bonded throughout the web or at substantial areas thereof with a copolymer of vinyl acetate and an alkyl acrylate, a copolymer of vinyl acetate and an alkyl methacrylate, or a tripolymer of vinyl acetate, an alkyl acrylate and an alkyl methacrylate, the alkyl radical containing less than nine carbon atoms, said binder material comprising at least about 70 per cent of vinyl acetate based upon the weight of the total monomers. Suitable webs may be formed by cording, gometting or airdeposition. The fibres in the web may be oriented predominantly in one direction or the web may be substantially isotropic. Specified fibres are cotton, jute, ramie, wool, viscose, rayon, cuprammonium, cellulose acetate, nylon -and polyethylene, alone or in combination with one another. The binder may be deposited in the web by printing, spraying or impregnating. The adhesive bonding material may be deposited in ring-like spaced areas or diagonally crossing lines. Specifications 674,779 and 677,928, [both in Group IX], are referred to.
Patent GB-823281-A (GB)
Title: Improved process for producing sheathed wire heating elements
Inventor: TURNBULL JOHN STRATTON
IPC: H05B3/68
Filed: 1956-12-05
Abstract: 823,281. Making heating coils; coiling. METROPOLITAN-VICKERS ELECTRICAL CO. Ltd. Dec. 5, 1957 [Dec. 5, 1956], No. 37195/56. Classes 83 (2) and 83 (4). In a method of making a coiled sheathed wire heating element 1, Fig. 4, e.g. a boiling ring, a straight length of element 1, Fig. 1 is tensioned between spaced jaws 2 and an intermediate region of the element introduced into an open slot 4 in the apical end of a conical former 3 which is rotated to wind the heating element into a double interlaced spiral with the free ends parallel, after which the wound element is flattened by pressing into a moulding block 7 having a spiral recess 8. The jaws 2 may be slidably mounted in a bed and biased apart by springs and are also rotatable about an axis parallel to that of the former so that the ends of the element are not twisted. Ledges 6 on the conical mandrel are arranged as a double interlaced spiral to receive the element as the latter is wound on the mandrel. To prevent damage to the element during pressing a resilient block 11, e.g. hard rubber is introduced between the ram 10 and the moulding block 7 and to assist entry of the coiled element into the recess 8 the edges of the recess are relieved at 9. Lift pins may be provided to eject the work from the recess.
Patent GB-1463335-A (GB)
Title: Gear box for the drive transmission of a motor vehicle
IPC: F16H37/04
Filed: 1974-08-23
Abstract: 1463335 Change-speed gear KLOCKNER-HUMBOLDT-DEUTZ AG 23 Aug 1974 [30 Aug 1973] 37227/74 Heading F2D A drive transmission for vehicles, e.g. as used in agriculture or building construction, has a number of selectable primary gear paths between an input shaft and an intermediate shaft, and a plurality of secondary gear paths between the intermediate shaft and an output shaft, a plurality of the primary gear paths driving the intermediate shaft at lower speeds than the input shaft, a further one of the primary gear paths driving the intermediate shaft at a higher speed than the input shaft, and another one of the primary gear paths providing reverse drive. An engine-driven clutch 2 has a plate 4 for a power take-off shaft 53 and a plate 3 driving an input shaft 5 on which is fixed a gear-wheel 14. The primary gear paths provide four forward ratios and one reverse ratio as follows. Drive in the lowest, or creep, ratio takes place through wheels 14, 15, a hollow shaft 17, wheels 18, 20, a hollow shaft 21 rotatable on the intermediate shaft 22, wheels 44, 42, a hollow shaft 41, wheels 43, 45 and a pin-type clutch 46 which is slidable on splines on the shaft 22. Low ratio is established by a dog clutch 33 which couples the hollow shaft 21 to the shaft 22 through a wheel 23 fixed thereon so that drive is transmitted through wheels 14, 15, 18, 20. Medium ratio is established by a dog clutch 34 which couples the hollow shaft 17 to a wheel 27 so that drive takes place through wheels 14, 15, 27, 23, and fast ratio, in which the intermediate shaft 22 is driven faster than the input shaft, is established through a dog clutch 39 which couples a wheel 38 to a shaft 36 so that drive is transmitted through wheels 14, 37, 38, and a wheel 25 fixed to the shaft 22. An optional further ratio may be obtained by providing a dog clutch for coupling the input shaft 5 direct to the intermediate shaft 22. Reverse drive takes place through a wheel 49 in mesh with the wheel 14, a dog clutch 51, and wheels 50, 29, 25. The wheel 49 may alternatively mesh with the wheel 20. Four secondary gear paths between the intermediate shaft 22 and the output shaft 16 are provided by dog clutches 31, 32 by which any of wheels 27, 28, 29, 30, in mesh with wheels 23, 24, 25, 26 fixed to the shaft 22, may be made fast with the shaft 16. The shaft 16 drives road wheels 12 through bevel gearing 8, a differential 9 and reduction gearing 10. A second output may be taken from a wheel 52 fixed to the shaft 16.
Patent GB-873115-A (GB)
Title: Improvements in and relating to gearing
Inventor: SCHROETER ERICH
IPC: F16H37/00
Filed: 1957-11-29
Abstract: 873,115. Reversing gearing. ZAHNSCHNEIDEMASCHINENFABRIK MODUL VEB. Nov. 29, 1957, No. 37316/57. Class 80 (2). [Also in Group XXII] Gearing for effecting a drive of one shaft 22 in one direction and a second shaft 25 alternatively in opposite directions comprises a pair of shafts 4, 6 adapted to be driven selectively and geared to the side members 19, 39 of a differential gear, the carrier 21, 41 of which is secured to the shaft 22, and through further intermediate gears to the side members 27, 44 of a second differential gear, the carrier 29, 46 of which is secured to the shaft 25. The arrangement of the gearing is such that the side members 19, 39 of the first differential rotate in the same direction while the side members 27, 44 of the second rotate oppositely. Thus, if either side member of the first differential is held by locking-devices 18 or 38 and the other side member driven the rotation of shaft 22 is in the same direction but that of shaft 25 is reversed. As applied to the drive of the cutter feed and the rotation of the workpiece for machining a herring-bone gear-wheel, the drive of shafts 4, 6 and operation of locking-devices 18, 38 are controlled so that while the cutterfeed continues in the same direction the rotation of the workpiece is reversed at the centre of the teeth. This control is automatically effected in the desired sequence by electrical contacts. Reversal of the feed is effected by reversal of the driving motor.
Patent GB-892723-A (GB)
Title: Production of alkanols
Inventor: QUIN DENIS CHESELDEN
IPC: C07C29/52
Filed: 1959-11-04
Abstract: An alkanol is produced in the form of a borate ester by heating an alkyl hydroperoxide with an alkane in the presence of an oxyacid of boron or boron trioxide and in the substantial absence of molecular oxygen, preferably at a temperature from 80 DEG C. to 250 DEG C.  The process may be carried out with a pre-formed alkyl hydroperoxide or, alternatively, an alkane may be partially oxidised, for example, with oxygen to produce a mixture of an alkyl hydroperoxide with the alkane, this mixture then being heated in the presence of the oxy-acid of boron or boron trioxide. The oxidation and hydroxylation may be carried out in separate reactors, the product of the second step being recycled to the oxidation step.  Thus the oxidation of an alkane to form a solution consisting of one or more alkyl borate esters may be effected continuously.  The oxy-acid of boron may be orthoboric, tetraboric or metaboric acid.  The alkanols may be obtained by hydrolysing the alkyl borates in the presence of water and separating by decantation, distillation or by extraction with a water-immiscible solvent.
Patent GB-1517388-A (GB)
Title: Cobalt complex azo dyes
IPC: C09B45/16
Filed: 1975-09-12
Abstract: 1517388 Cobalt complex azo dyes CIBAGEIGY AG 12 Sept 1975 [13 Sept 1974] 37607/75 Heading C4P Novel 1:2 cobalt complex dyes of azo compounds of formula (where D is phenyl, naphthyl, naphthylazophenyl, phenylazonaphthyl, naphthylazonaphthyl or phenylazonaphthyl substituted by SO 3 H and optionally also by Cl, Br, NO 2 , low molecular alkyl, alkoxy, alkanoylamino or alkoxycarbonylamino and R is H, Cl, methyl or SO 3 H) are prepared by reacting the azo compound with a cobalt donor. The dyes are used after colouring natural and synthetic polyamide materials.
Patent GB-1519700-A (GB)
Title: Circuit board assembly eg for use in an eletronic timepiece
IPC: H05K3/30
Filed: 1976-09-10
Abstract: 1519700 Circuit assemblies DAINI SIEKOSHA KK 10 Sept 1976 [16 Sept 1975] 37639/76 Heading H1R In a circuit board assembly, an electrical component 3 is positioned on a circuit board 1 of synthetic material by means of a number of projections 1a which engage the component. The projections, which are of insulating material, may be formed integrally with the board, and may be secured to the component by adhesive. Electrical connection to the component can be made via leads 4 connected to plates 2 mounted in the board 1. The board, which is suitable for mounting a resistor, a condenser, or an oscillator unit, may be used in an electronic timepiece.