baber/WOPTO huggingface dataset:
Patent GB-628829-A (GB)
Title: Improvements in and relating to control circuit arrangements in electric motor equipments
IPC: H02P7/34
Filed: 1946-09-20
Abstract: 628,829. Exciting dynamo-electric machines. HOLLYER, E. B., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Sept. 20, 1946, No. 28269. [Class 35] [Also in Group XXXVII] A system in which the motor-load is supplied from a constant current source, or a source having a predetermined relation between the output voltage thereof and the motor armature current, comprises a control circuit arrangement common to the motor excitation and the current source for simultaneously reducing the motor armature current and excitation of the motor in dependence on increase of motor speed, with a polarised rectifier included in the circuit controlling the output current of said source, which rectifier opposes variation of armature current with variation of motor field strength above a given value of said motor field strength. An electric motor 1 is supplied from a generator 20 the output of which is controlled by a field winding 21 of an exciter 22 supplying a generator field winding 25. The exciter 22 is provided with a control winding 23 which opposes the winding 21 and which is excited in accordance with the output current of the generator. The motor field winding 2 is excited by a machine 3, for example in the manner described in Specification 616,916, the said machine having a control winding 4 and an opposing winding 5 which is connected across the motor armature. The winding 21 is also excited by the machine 3 through a rectifier 30 which is provided with a polarising current from a source 31 through a resistor 32. At high motor speeds the output of the exciter 3 is comparatively low, and the current supplied to the winding 21 is substantially proportional to the voltage of the exciter. With decreasing motor speed the voltage-drops across the rectifier, due to the machine 3 and the source 31 respectively, become equal, and thereafter an increase of exciter voltage is substantially ineffective to increase the excitation of the winding 21. At high motor speeds, therefore, the motor armature and field currents are maintained substantially proportional, but below a given speed the motor excitation increases and the armature current is maintained substantially at a steady value. At a still lower value of motor speed the exciter 3 may become saturated and the motor excitation may also be kept substantially constant, as for example described in Specification 616,916. Specifications 628,827 and 628,831 also are referred to.
Patent GB-207800-A (GB)
Title: Improvements in and relating to electron discharge devices
IPC: H01J19/68
Filed: 1923-11-09
Abstract: 207,800. British Thomson - - Houston Co., Ltd., (Assignees of Mackay, G. M. J., and Charlton, E. E.). Nov. 29, 1922, [Convention date]. Low - pressure metallicvapour apparatus.-A rectifier or other tube containing an incandescent cathode and one or more other electrodes is highly exhausted and supplied with caesium or rubidium vapour which is maintained at a temperature such that the vapour pressure is about 0.02 mm. of mercury', so as to increase materially the electron emissivity of the cathode. The cathode 2 consists of molybdenum or nickel, or of tungsten with or without a small addition of thoria, and is surrounded by an anode 3 of molybdenum, nickel, or tungsten. A tube provided with two bulbs is sealed to the container 1 and the whole baked at 450‹ C. and exhausted. A mixture of caesium chloride and calcium is introduced into the tube which is then closed. The container and tube are again heated and exhausted, care being taken to remove all moisture. Caesium is reduced by heat and distilled into the bulbs, and passes thence into the container, the tube being then sealed off. In operation the secondary 15 of a transformer and a load such as a battery 16 are connected between the cathode and anode, and the cathode may be heated from a tapping across the secondary. The heating circuit may be opened by means of a switch 19 if sufficient heating of the cathode is produced by bombardment by positive ions. The device should be worked at a temperature of 150‹ C. but in some cases a preliminary operation at 200‹ C. may be necessary. The container may be surrounded by a heat-retaining jackest or by a heater 18. Double-wave rectification may be obtained by the use of two cylindrical anodes of the same diameter surrounding a single cathode. The space current may be increased by providing a winding around the container setting up a magnetic field. The cathode may consist of a tube heated internally by a resistance. Specifications 184,446 and 201,893 are referred to.
Patent GB-449785-A (GB)
Title: Improvements in torque converting mechanism
IPC: F16H33/18
Filed: 1935-10-15
Abstract: 449,785. Variable-speed gearing. McGILL, H., 42, Talbot Avenue, Cantorbury, Victoria, Australia, and DRAKE, V. R., 150, Butchers Road, Chiming Town, London. Oct. 15, 1935, No. 28370. Addition to 422,432. [Class 80 (ii)] In the invention of the parent Specification, a driving planet-carrier 6, Fig. 1, carries planet gears 14, the rotation of which relatively to the carrier 6 is elastically arrested by centrifugal weights 11, Fig. 2, constrained each to follow an eccentric circular track between outer and inner guides 9, 10. The gears 14, Fig. 1, drive a sun 15 at a speed which varies automatically with the load from zero to direct drive. The weights 11 are guided by radial slots 7<1> in a member 7 fast on the planet shaft 13. According to this invention, the driving carrier 6 carries an internally-toothed ring 4 through which the said carrier is driven at increased speed through a speed-multiplying train 4, 2, 3. A main driving-disc 1 carries planets 2 which mesh with the ring 4 and with a sun gear 3 fast upon a floating shaft 5 to which the driven sun 15 of the automatic transmission is also secured. The load resistance on the gear 15 is transmitted to the gear 3 which lags behind so that the planets 2 drive the ring 4 and carrier 6 at increased speed. A reversing train connects the sun 15 to a tail shaft 24. For forward driving, a dog clutch 23 splined on the shaft 24 engages a drum 20 which carries idlers 18 meshing with a ring 16 rigid with the sun 15 and with the shaft 5 and meshing also with a sun 19 keyed to with tho shaft 24. Reversed driving is effected through the automatic gearing by disengaging the clutch 23 and holding the drum 20 by a brake 22. Specification 449,784 is referred to.
Patent GB-815479-A (GB)
Title: Improvements in or relating to protective arrangements for electrical systems, such,for example, as tachometer generator systems
Inventor: ADDICOTT MICHAEL
IPC: H02H7/06
Filed: 1955-10-05
Abstract: 815,479. Protective cut-out systems. GENERAL ELECTRIC CO. Ltd. Oct. 5, 1956 [Oct. 5, 1955], No. 28405/55. Class 38 (5). A protective arrangement includes a valve oscillator for injecting a testing current into a circuit through resistance and capacitor and a potentiometer chain for detecting change of voltage across the resistance for tripping or signalling when the circuit impedance exceeds a certain value. The circuit normally operates on D.C. or on A.C. at a frequency lower than that of the oscillator. A direct current tachometer generator 1 driven by a machine shaft 2 feeds a potentiometer 4 in a servo control amplifier 3. An auxiliary current from a valve oscillator 7 is fed into the armature at 5, 6 through a resistance 8 and a capacitor 53 from a transformer 10 with a swamping resistance 14 across its secondary. An amplifier-detector 11 responds to the voltage across the potentiometer chain 21 which is across the resistance 8 so that a set drop in this voltage will result in the operation of a relay 12 which can shut down the apparatus on which the tachometer is fitted. The setting at which the relay 12 operates is adjusted by a potential divider 23 with a metering jack 24 in series. In Fig. 2 (not shown), the same protective circuit is applied to a trolley driven by a motor fed from trolley wires with a second set of trolley wires for an interlocked brake circuit.
Patent GB-409590-A (GB)
Title: Improvements in machines for cramping doors and the like
IPC: B25B5/14
Filed: 1933-10-16
Abstract: 409,590. Cramps. GARDEN, W. B., Garville, Glasgow Road, Kilsyth, Stirlingshire. Oct. 16, 1933, No. 28527. [Class 61 (ii).] A power-driven machine for cramping doors &c. comprises a frame made up of longitudinal members 1 and transverse members 2 supporting side bars 10 each carrying a number of adjustable clamping jaws 12 and adapted to be actuated by right and left screws 9 and pinions 8 driven by worms on a longitudinal shaft 4 driven by gearing 5 on a shaft 6 carrying pulleys 17, 18, 19, the pulley 18 being clutched to the shaft by means of friction washers 20 and a spring 21 and the pulleys 17, 19 being loose on the shaft and engaged by crossed and uncrossed belts 28, 29 driven by pulley 23. The belts are shifted to cause the clamping bars 10 to be moved inwards or outwards by means of a rod 26 carrying belt forks 25 and urged by springs 27 into mid-position, the movement of the rod 26 in one or other direction by a hand lever 34 moving one or other of the driving belts on to the pulley 18. The ends of the door &c. are engaged by jaws 30 operated by screws 31 and hand wheels 32.
Patent GB-191517-A (GB)
Title: Improvements in carburettors for internal combustion engines
IPC: F02M7/14
Filed: 1921-10-29
Abstract: 191,517. Stubbs, J. W. Oct. 29, 1921. Spray carburettors comprise a tubular body through a reduced portion A of which slides a coned winged plunger B connected to a fuel valve D. Air enters at E. As the plunger is moved to the left a gradually increasing throttle opening is produced and when it is released it first closes the mixture and fuel passages and on still further movement again opens the throttle passage to admit air only. A second valve C is piovided on the fuel pipe.
Patent GB-352325-A (GB)
Title: Improvements in coke oven charging larries
IPC: C10B31/04
Filed: 1930-09-25
Abstract: 352,325. Charging coke ovens. GAS CHAMBERS & COKE OVENS, Ltd., Artillery House, Westminster.-(Assignees of Collin & Co. ; 14, Beurhausstrasse, Dortmund, Germany.) Sept. 25, 1930, No. 28750. Convention date, Sept. 25, 1929. [Class 51 (ii).] In connection with coke-oven charging larries or bunker-cars means are provided for preventing the escape of gases from the ovens when being charged. The larry-bunkers e are closed at the top and provided with charging openings closed by covers or slides f actuated by a rod g, and a gas collecting pipe k which can be lifted and swung is adapted to connect the end bunker with the gas uptake s communicating with the receiver n by a valve v and ejector m. The bunkers are connected together by pipes, and pipes j lead from the discharge funnels b to the space in the bunkers above the charge. The discharge funnels bare provided with vertically movable hoods h adapted to be lowered on to the charging openings o of the ovens and operated by rods c, d. At the bottom the bunkers have closing slides i the operating rods of which may be interconnected with the rods g, c, d so that the slides are opened after the hoods h have been lowered and the covers f closed. The bunkers may be connected to a separate gas exhausting device.
Patent GB-427779-A (GB)
Title: Improvements in and relating to printing or coating with a heated medium
IPC: B41M5/10
Filed: 1934-10-08
Abstract: 427,779. Printing and coating machines; inking-apparatus; carbon papers. CHAMBON, Ltd., Riverside Works, Standish Road, Hammersmith, London.-(Assignees of Anciens Etablissements L. Chambon; 64, Rue de CrimÚe, Paris) Oct. 8, 1934, No. 28762. Convention date, Oct. 23, 1933. [Classes 100 (ii) and 100 (iv)] [See also Groups VIII, XI, and XIII] Apparatus for printing or coating paper or other suitable material with a heated medium such as carbon copying ink or wax is provided with means for heating the printing or coating cylinder which comprise a number of hot elements exterior to and equally spaced from the surface of the cylinder, the elements being supported by a lever system comprising two levers pivotally mounted on a common axis and each carrying a hot member at its free end and two links pivotally connected to the levers and to an axle on which is carried a further hot member, means being provided to adjust the position of the members with respect to the cylinder. The printing or coating cylinder 5 is heated by means of the external resistances 23, 24, 25 which are arranged on insulators parallel to the roller axis. These electric heating elements are carried on levers so that they may be arranged equidistant from the roller surface, the elements 23, 25 being mounted on levers 26, 27, Fig. 4, pivoted on an axle 28, and the element 24 being mounted at the common pivot of two levers 31, 32, pivotally connected to the levers 26, 27. The element 24 is mounted on a slider 33, moving in a guide 34, so that as this element is adjusted, the elements 23, 25 move correspondingly. In addition, the whole heating device is movable on a slide 37, Fig. 1, and a guard may be arranged to cover the complete apparatus to prevent heat changes or losses. The roller 5 receives the printing fluid from a fountain 9, by means of geared rollers 12, 13, the latter of which is preferably covered with felt, and the material is maintained fluid by a thermostatically-controlled electric heater 10 in the fountain. The roller 13 may be adjusted relatively to the roller 12 by a screw 14 and relatively to the roller 5 by screws 15, 16, which engage the side members 11 supporting the roller and pivotally mounted on the axis of the roller 12. The cylinder may comprise a sleeve carrying a design in relief and mounted on end caps of synthetic resin or other insulating heat-resisting material, which are keyed to the roller shaft.
Patent GB-355552-A (GB)
Title: Improvements relating to electrodes for use in electric arc welding or the fusion-deposition of metals
IPC: B23K35/30
Filed: 1930-09-25
Abstract: Beater arms for crushing oil-bearing seeds and parts of cement grinding machines may be reinforced with steel containing 0,4-0,6 per cent of carbon, 2,5-5 per cent of chromium, and 1-2 per cent of molybdenum by deposition from a flux covered arc welding electrode. The deposited metal is stated to be in the tempered martensitic condition, has a Brinell hardness of 600-700 and is sufficiently tough to withstand heavy abrasive and hammering stresses.  The ferrous core of the electrode may contain 1-1,5 per cent of carbon, 5-7 per cent of chromium, and 2-3 per cent of molybdenum.  A core of gauge 6 contains 1,1 per cent of carbon, 5 per cent of chromium and 2 per cent of molybdenum, whereas a core of gauge 8 contains 1,2 per cent of carbon, 6 per cent of chromium and 3 per cent of molybdenum, and a core of gauge 10 contains 1,4 per cent of carbon, 7 per cent of chromium and 3 per cent of molybdenum.
Patent GB-907490-A (GB)
Title: Improvements in or relating to ceramic barrier layer capacitors
IPC: H01L29/00
Filed: 1960-08-19
Abstract: 907,490. Semi-conductor devices; capacitors. SIEMENS & HALSKE A.G. Aug. 19, 1960 [Aug. 20, 1959], No. 28783/60. Class 37. A ceramic barrier layer capacitor comprises a semiconductor body having at least two zones of different resistivity, the thickness of the transition region between these zones being so small compared with the thickness of the higher resistivity zone, that under normal bias conditions the space-charge zone extends across the whole of the higher resistivity zone so that capacity does not vary with voltage. Fig. 2 shows a PIN diode in which the thickness of the transition regions between P and I and I and N is thin compared with the width of the intrinsic region. The centre region may be weak N or weak P type instead of intrinsic. Under operating conditions the working range of the applied voltage is such that with reverse bias the space-charge layer just fills the centre zone. An alternative embodiment describes an N-, N, N- or P-, P, P-construction with rectifying electrodes at each end contacting the lowconductivity zones. This may be produced by oxidizing the end surfaces of a reduced, sintered, ferro-electric, ceramic body to form weak conductivity zones. The rectifying electrodes may consist of silver layers. The arrangement provides a barrier layer capacitor in which the capacity is not variable with voltage (since the width of the space-charge layer remains substantially constant) so that for example two A.C. signals may be applied in series to the device without having a modulating effect.
Patent GB-927316-A (GB)
Title: Coating material and process
IPC: C08J3/18
Filed: 1960-08-19
Abstract: A process for the preparation of finely divided coating compositions for use in fusion coating processes comprises mixing plasticizer with paste grade polyvinyl chloride resin, solvating said mixture of plasticizer and resin and subdividing said solvated mixture of plasticizer and resin into a pulverulent powder having an average particle size of less than 40 mesh.  The resin may be a homopolymer of vinyl chloride or copolymer of vinyl chloride with vinyl formate, vinyl acetate, vinylidene chloride, vinyl alkyl ethers, maleic esters, fumaric esters, acrylic esters or acrylonitrile, mixtures of such polymers and copolymers or mixtures thereof with hydrocarbon resins, acrylic resins, rosin ethers, abietic acid or abietic acid derivatives.  Solvation may be effected by heat only or by a combination of heat and high shear mixing forces.  Sub-division may be effected by freezing the solvated mass in liquid nitrogen and pulverizing in an impact hammer mill.  The compositions may also comprise stabilizers, antifungal agents, fillers and pigments. Examples describe the preparation of compositions from n-octyl n-decyl phthalate, epoxidized soya fatty acids, barium/cadmium soaps and organic phosphites with (I and II) polyvinyl chloride, chlorinated polyphenyls and titanium dioxide; (III) polyvinyl chloride, a copolymer of vinyl chloride and vinyl acetate, chlorinated polyphenyls and titanium dioxide; (IV) polyvinyl chloride, a copolymer of vinyl chloride and vinylidene chloride, chlorinated polyphenyls and titanium dioxide; (V and VI) polyvinyl chloride and calcium sulphate; and (VII and VIII) polyvinyl chloride, a copolymer of vinyl chloride and diethyl maleate, stearic acid, titanium dioxide and calcium sulphate.
Patent GB-1318556-A (GB)
Title: Methods and apparatus for the treatment with water of slagcontaining
Inventor: FORSCHEPIEPE F
IPC: C21B3/08
Filed: 1970-06-15
Abstract: 1318556 Slag treatment F FORSCHEPIEPE 15 June 1970 [14 June 1969 18 Oct 1969] 28825/70 Heading C1K Steel slag containing iron is formed into a bed around one or more water conduits, allowed to solidify, a charge exploded to form a hollow space in the bed adjacent the conduits, and water passed through the conduits into the bed to cool it. Each conduit comprises an upper 1 and a lower 2 pipe section, the latter holding the charge.
Patent GB-1456507-A (GB)
Title: Machine for and a method of forming pellets of plastics  material
IPC: B29B9/06
Filed: 1972-12-23
Abstract: 1456507 Pellitizing die FARREL BRIDGE Ltd 19 Dec 1973 [23 Dec 1972] 28843/76 Divided out of 1456506 Heading B5A The description is identical to that of Specification 1,456,506, but the claims relate to the die plate being of a thickness greater than ¢ inch and less than 1 inch, and the means for supporting a central region of the die plate against extrusion pressure.
Patent GB-340486-A (GB)
Title: Improvements in the manufacture of concrete pipes and the like and apparatus therefor
IPC: B28B21/56
Filed: 1929-09-23
Abstract: 340,486. Moulding concrete pipes &c. RICHARDS, G. L. S., 52, Albert Street, Goodwood, Adelaide, Australia. Sept. 23, 1929, No. 28849. [Class 87 (ii).] Concrete pipes are moulded between a core 42 and a mould 41, the material being charged into the mould in limited quantities and compressed between a plunger 27 and a displaceable ring 40. When the complete pipe has been formed the core and mould are stripped vertically each in one piece from the pipe, the core passing within the plunger 27 and being locked therein by pawls. The ring 40 is carried by pins 39 supported by hydraulic plungers 37 relief valves being provided in the cylinders 38 to limit the axial pressure which may be applied to the pipe. The core 42 is carried by a plate 33 on an hydraulic ram 34. The plunger 27 is lifted by a ram 29 and pressed downwards by a ram 26. Longitudinal and circumferential reinforcements are embedded in the pipe during formation. The longitudinal wires pass through the plunger 27, are secured to the ring 40 and are drawn under tension from spools by the ring 40 in its descent. The rings forming the circumferential reinforcement are stored in an annular recess in the plunger 27 and are released automatically by partly rotating intergeared rods carrying projecting lugs. The concrete is supplied by a tip-bucket 62 running on a track 60 round the mould. In operation, after the first charge of material has been inserted, the plunger 27 is lowered to apply pressure to the charge, hinged segments 90, Fig. 6, closing the annulus 72 in the plunger during this operation. The plunger is then lifted the segments 90 swung clear and the release mechanism operated to allow a reinforcing ring to fall on the compressed concrete. The segments 90 are then closed and the plunger 27 again operated but under higher pressure in order to embed the ring in the concrete and displace the ring 40 downwards. This operation is repeated till the mould is filled, after which the mould is lifted by hydraulic rams 46 and the core is lifted by the ram 34, the plunger 27 being meanwhile held in the lowered position. The core and mould having been stripped, the plunger 27 is then lifted allowing the pipe to be removed.