baber/WOPTO huggingface dataset:
Patent GB-720306-A (GB)
Title: Improvements in or relating to electric apparatus of the kind comprising a thermionic valve
IPC: H04J3/04
Filed: 1952-02-20
Abstract: 720,306. Valve circuits; pulse modulation circuits. GENERAL ELECTRIC CO., Ltd., KIRKNESS, R. H., and MORROW, A. B. Feb. 16, 1953 [Feb. 20, 1952], No. 4518/52. Classes 40 (5) and 40 (6). An amplifier comprises a thermionic valve having at least three grids between cathode and anode so that a signal applied to the first grid appears across the cathode load resistor and a signal applied to the third grid is produced as two signals in anti-phase at the anode and second grid respectively. The Figure shows a demodulator for an amplitude-modulated pulse train applied at input 1. The bridge-type diode gate 5 normally presents a high impedance between point 3 and capacitor 4, but during the presence of each pulse of a negative-going pulse train applied at capacitor 31 to the suppressorgrid of pentode 7 positive and negative-going pulse trains are produced at the anode and screen-grid circuits respectively. Thus during each pulse at the suppressor grid, which is synchronizedwith each pulse at the input 1, diode gate 5 is opened to charge capacitor 4 to a level dependent upon the peak amplitude of the pulse at input 1. The voltage across capacitor is thus the modulation signal of the input pulse train and can be taken from across the cathode load resistor at output 9. The feedback from the tapping on cathode resistor 8 to the junction of resistors 21 and 22 maintains this junction at a voltage equal to that across capacitor 4 so that the gate 5 may be opened with gating voltages of relatively small amplitude. In a modification positive-going pulses are fed to the suppressor grid of pentode 7, and diode 34 conducts to hold the suppressor grid to a voltage equal to that of the cathode. In between pulses capacitor 31 charges via resistor 25 so that at the cessation of a pulse the suppressor-grid potential is at a relatively low value and the time constant is such that valve 34 is cut off at the anode for a period substantially longer than that of the original positive pulse. Diodes 13, 14 may be crystal rectifiers. The circuit may function as a demodulator for a time-multiplexed pulse system, the pulse train applied at the suppressor grid of valve 7 being synchronized to select a given channel in the system.
Patent GB-814968-A (GB)
Title: Improvements in and relating to mountings for textile twist tubes
Inventor: SCRAGG ERNEST PHILLIP RUSHTON
IPC: D02G1/06
Filed: 1956-02-14
Abstract: 814,968. Anti-friction-wheel bearings. SCRAGG & SONS Ltd., E. Jan. 8, 1957 [Feb. 14, 1956], No. 4525/56. Class 12 (1). [Also in Group IX] In a mounting for a plurality of textile twist tubes (see Group IX), each tube 14 is mounted in the angle formed by two adjacent vertical rollers 9, 11 mounted on a carriage 10 pivoted at 8 on an arm 7 which swings about a pivot 6 to permit the tubes to be swung into and out of engagement with a driving belt 5. Rollers 9, 11 are all mounted as shown at the left of Fig. 1, 12 being a housing having bearings for a peg 13 attached to the roller 11. Twist tubes 14 each have a flange 15 resting on top of the upper flanges of a pair of rollers 9, 11. A greater number of rollers and twist tubes than are shown may be employed.
Patent GB-415037-A (GB)
Title: Improvements in or relating to the electrodeposition of metal
IPC: C25D5/50
Filed: 1933-02-14
Abstract: 415,037. Electrodeposition of metal. TENNANT, W. J., 111, Hatton Garden, London.-(Copperweld Steel Co. ; Glassport, Pennsylvania, U.S.A.) Feb. 14, 1933, No. 4563. [Class 41.] An article produced by electrodeposition of metal on a core, such as a copper-coated steel wire, is heated adequately to develop union between the base and the coating and is thereafter drawn through a die to decrease its diameter, increase its length and heal porosity developed during the heating step. Care must be taken that the resulting product is not oxidized, e.g. the heating may be effected in hydrogen or an inert atmosphere. The temperature of the heating operation should be above 600‹ F., but below that at which the coating or the core begins to flow, e.g. 1900‹ F. in the case of copper. Hot or cold drawing may be employed; hot drawing should be effected under non-oxidizing conditions. Cores having coatings of considerable thickness may be treated. In an example a steel core 0À375 inches in diameter is built up with copper to a diameter 0À467 inches and after heating is drawn to its original diameter. The coating so treated has the grain structure of annealed wrought metal. Coatings may be deposited in several stages. A main deposit of copper from an acid bath may be preceded by a layer of nickel, tin, zinc, iron or copper from a cyanide bath. In the apparatus shown, the wire W is passed through a tube 10, provided with a water seal 9 and supplied with hydrogen through a reducing valve 13. The tube is enclosed within a furnace 11 heated by burners 12. The tube 10 is tapered at the delivery end and is enclosed by a die-holder 17 packed with the drawing lubricant consisting of graphite with very little grease. After treatment the wire may be subjected to further heating and working operations, e.g. a hot drawing operation may be followed by cold drawing and then by heat treatment. Porous zones are not developed in such further treatment. Specification 200,854, [Class 83 (ii)], is referred to.
Patent GB-829390-A (GB)
Title: Improvements in or relating to coupling devices
IPC: F16B2/06
Filed: 1958-02-12
Abstract: 829,390. Clamps. LAMBRETTA CONCESSIONAIRES Ltd. Feb. 12, 1958 [Feb. 12, 1957], No. 4677/58. Class 44 A device for coupling together two components, for example the handlebars and windscreen supporting rod of a motor scooter, comprises a sleeve 1 formed in halves 2, 3 of resiliently deformable material, e.g. rubber, the halves being brought together to grip one of the handlebars therebetween by a pair of rigid half collars 9, 10 secured together by bolts 15, 16 which pass through projecting portions 11, 12 and 13, 14 on the half collars. The bolt 15 is provided with a nut 17 and the bolt 16 has screwed thereon a gripping means 18 which is bored to receive the supporting rod and is longitudinally split for gripping the rod when a bolt 19, passing through apertures in the split portion, is tightened. The sleeve 1 preferably has a slightly conical bore formed with a pair of longitudinal grooves 6. The handlebars may be of non-circular curved crosssection wherein the minimum radius of curvature is less than the minimum radius of curvature of the sleeve and the maximum dimension is smaller than the minimum internal dimension of the sleeve.
Patent GB-115812-A (GB)
Title: Improvements in Ignition Systems for Internal Combustion Engines.
Inventor: KETTERING CHARLES FRANKLIN
IPC: F02P5/06
Filed: 1916-05-04
Abstract: 115,812. Kettering, C. F. Aug. 30, 1915, [Convention date]. Make-and-break switches, mechanical; actuating.-An ignition system for high-speed multicylinder engines comprises a number of make- and-break devices (46, 48, in a primary circuit) which are opened successively by an engine driven timing-cam 51, in synchronism with distributor mechanism A, B, operating successively in the secondary circuits. Either the stationary or the moving contacts of the distributors are staggered with regard to each other so as to ensure their successive actuation. An engine-driven shaft 73 is connected to a spindle 75 by a pin which is carried by a manually adjustable collar 77 and traverses straight and oblique slots in the parts 73, 75. The spindle 75 drives an upper shaft 80 through a similar connexion controlled by a centrifugal governor 86, this upper shaft carrying the timing-can 51. A transverse shaft 94, to which the rotary arms of the distributors are secured, is driven from the spindle 75. The distributor contacts are of such dimensions that the automatic mechanism for regulating the timing may operate without angular adjustment, of the distributing mechanism.
Patent GB-1510596-A (GB)
Title: Blast furnace process for iron production
IPC: C21B5/02
Filed: 1976-02-06
Abstract: 1510596 Blast furnace operation MOLTEN METAL ENG CO 6 Feb 1976 04729/76 Heading C7D In a blast furnace process wherein the charge has an alkali metal content exceeding 11b per ton of molten iron there is also included in the charge 0À1 to 10% of olivine based on the weight of the iron oxide materials. The olivine may be charged independently or may be incorporated in agglomerates with either the ore or the coke; it may be mixed with fine ore prior to sintering, or the mixture may be subjected to pre-reduction prior to sintering. The agglomerate may contain 0À1-15% of olivine.
Patent GB-139527-A (GB)
Title: Improvements in struts, spars and the like structural parts for aircraft
IPC: B64C3/18
Filed: 1918-03-18
Abstract: 139,527. Page, F. H. March 18 1918. Framework.-In aircraft spars, struts, &c. in which the cross-section is increased at parts where greater strength is required, the increased section is obtained by the addition of laminations tapered off on either side of the point receiving the load. The Figures show laminations 4, 4<a> of wood or the like applied within a hollow spar 1. The laminations may, however, be arranged outside the spar. Further, a plate of aluminium, plywood, &c. such as 8 is applied under the metal clips 7 attached to wooden or like spars, in order to prevent shearing or tearing of the wood.
Patent GB-490500-A (GB)
Title: Circuit for generating or amplifying high frequency electric oscillations
IPC: H03F3/54
Filed: 1938-02-16
Abstract: 490,500. Valve circuits thermionic valves. MAGYAR WOLFRAMLAMPA GYAR KREMENEZKY JANOS R. T. Feb. 16, 1938, No. 4837. Convention date, Feb. 16, 1937. [Classes 39 (i) and 40 (v)] In a circuit for generating high frequency oscillations or for amplifying using the influence principle in which an accelerator grid 4 at higher positive potential than the anode 5 is used, an additional electrode 6 at the same potential as or a higher potential than the accelerator grid 4 is provided to bring the alternating space charge nearer to the anode 5 and so to increase the influence exerted by the said space charge on the anode. The anode is preferably perforated. When used for generating high frequency oscillations, the circuit may be back coupled by Lecher wire system 7. Specification 457,928 is referred to.
Patent GB-536502-A (GB)
Title: Improvements relating to change-speed mechanism
IPC: F16H3/16
Filed: 1940-03-15
Abstract: 536,502. Variable-speed gearing. SINGER MOTORS, Ltd., and SHORTER, L. J. March 15, 1940, No. 4840. [Class 80 (ii)] In a three speed variable speed gear of the lay-shaft type, the third and second speeds are introduced by a synchronizing device 16, and the first speed by a gear 20 which is slidable on the driven shaft into mesh with a pinion 21, fast on the layshaft 14 at the end thereof remote from the driving end, reverse speed being obtained by an idler 23, which meshes with the gears 20, 21 when the latter are not directly meshed with one another. As shown, the synchronizing device 16 is a double acting clutch of known form, the gear 20 is operated by a swinging fork 22, and the idler gear 23 is moved by a sliding fork rod 24 and swinging lever 25. The gear box may be as described in Specification 536,503. The invention may be adapted to include a hydraulic control for an auxiliary overdriven epicyclic gear as described in Specification 536,504.
Patent GB-786319-A (GB)
Title: Improved process for the manufacture of artificial threads, fibres and like products from viscose
IPC: D01F2/10
Filed: 1956-02-16
Abstract: Viscose containing 0.1-1 per cent of a polymer, copolymer or block polymer of an epoxyalkane or a substitution product thereof is spun into a coagulation bath containing at least 2 per cent of zinc sulphate and having a sulphuric acid content not greater than 1.3 times that of the alkali in the viscose.  The resultant products have a low swelling value and, if a polyethylene oxide of molecular weight 3800-4200 is used, a circular cross-section.  In an example, viscose containing 8.6 per cent of cellulose, 4.8 per cent of sodium hydroxide and 0.4 per cent of a block polymer of formula <FORM:0786319/IV (a)/1> in which b is 30 and a+c is 85, is spun at 50 DEG  C. into a bath containing 5 per cent of sulphuric acid, 17 per cent of sodium sulphate, 4 per cent of magnesium sulphate and 3.3 per cent of zinc sulphate, and the filaments are stretched 50 per cent in 2 per cent sulphuric acid, cut into staple, washed and dried.  Other examples are given also.
Patent GB-665133-A (GB)
Title: Improvements in or relating to tubulous heat exchangers
IPC: F01P11/08
Filed: 1949-02-23
Abstract: 665,133. Tubular heat-exchangers. UNITED AIRCRAFT PRODUCTS, Inc. Feb. 23, 1949 [Aug. 21, 1948]; No. 4991/49 Class 64(iii) A heat-exchanger, e.g. a radiator, aircraft oil cooler, air heater or the like, comprises spaced header plates 11, 12 and closelyspaced, thin-walled tubes 13 carried in openings in the header plates with the ends of the tubes extending beyond said header plates, a ring 29 of resilient sealing material being stretched over each tube and abutting the adjacent header plate. Preferably a casing 10 surrounds the header plates and is in contact therewith and individual resilient sealing members 25 surround the periphery of each header plate to provide seals between the header plates and the casing. In the form shown the tube openings in the header plates are counterbored to receive the ring seals 29 which are backed-up by relatively stiff rings 31, each end of the tubes being expanded to lock the seals in position. The header plates are each formed with flanges 23 grooved to receive the ring seals 25. The inner face of each header plate is formed with transverse slots 26 to receive baffle plates 14 which in addition to forming a tortuous path for the fluid flowing over the tubes serve as spacer elements for the header plates. End stops may be provided on the overhanging ends of the casing to prevent excessive relative axial movement of the core comprising the tubes and tube plates. The cross-sectional shape of the sealing rings may be rectangular, circular or any other suitable shape. The method of assembling an oil cooler according to the invention is described.
Patent GB-686948-A (GB)
Title: Improvements in or relating to crystal triodes
Inventor: MATTHEWS KENNETH ALBERT
IPC: G01R31/26
Filed: 1951-03-02
Abstract: 686,948. Semi-conductor amplifiers. STANDARD TELEPHONES & CABLES, Ltd. March 2, 1951, No. 5113/51. Drawings to Specification. Class 40 (iv). A crystal triode comprises a body of semiconductor material containing a donor impurity, a first thin layer containing an acceptor material on one of its surfaces, and a second thin layer containing donor material on the first layer, and a base electrode, and two rectifying electrodes respectively contacting the first and second layers. Alternatively, the specified donor and acceptor characteristics may be interchanged throughout. The Specification refers to an electro-forming process for a crystal triode and the use of donor or acceptor material on the collector electrode as described in Specification 681,809, which improves the current gain characteristics of the device. Improvement in current-gain may also be obtained by adding donor or acceptor material to the surface layer of the semi-conductor of N- or P-type respectively, and this may be derived from a collector electrode containing such material by carrying out the above electro-forming process, or by overloading such a collector electrode during normal use. After surface treatment, collector electrodes without such added material may be used, and may consist of pure tungsten, or an electrode plated as described in Specification 686,915. Phosphorus, antimony and arsenic are given as examples of donor material and may be deposited on a tungsten wire forming the electrode. The emitter electrode may also consist of phosphor-bronze material.
Patent GB-1366712-A (GB)
Title: Extraction of metals from ores
IPC: C01G21/06
Filed: 1972-02-03
Abstract: 1366712 Oxidizing metal ores SIMON ENG Ltd 3 Feb 1972 [23 Feb 1971] 5193/71 Heading C1A A method of oxidizing a mineral ore concentrate comprised of lead or zinc sulphides or mixtures thereof includes the steps of admixing with a binder, which may be water, and pelletizing the ore, feeding said pellets into a furnace which is supplied with combustion air, and recycling a portion of the waste gas from the furnace back into the furnace to control the concentration of sulphur dioxide in the furnace and hence control the rate of oxidation of the ore. Preferably the furnace is of the multihearth type where the pellets are introduced into the upper part of the furnace and preheated combustion air to the lower end. The apparatus used for carrying out the preferred process, whereby the combustion air is preheated by the recycle gases which are fed to a position part way up the furnace is claimed per se.
Patent GB-554156-A (GB)
Title: Improvements in or relating to the manufacture of paper, or like fibrous material
IPC: D21H17/70
Filed: 1941-12-16
Abstract: 554,156. Paper of high wet strength JACKSON, Ltd., H., and WEXLER, A. Dec. 16, 1941, No. 5231/43. Divided out of 554,131. [Class 96] The strength, particularly the wet-strength of paper &c. is increased by treatment with a soluble alkali metal silicate, drying or partially drying and treating with an acid, or with a solution of a soluble metal salt and washing und drying. Acids used may be 2 N hydrochloric, or 2 per cent. sulphuric acid, the silicate used therewith having a greater alkali-to-silica ratio than in normal commercial silicates; or metal salts used may be sulphates of aluminium, iron, or magnesium or chlorides of calcium, iron, or magnesium, the silicate used therewith having a lower alkali-to-silica ratio than in commercial silicates. The process is applicable to paper made from pulp which has been treated with a silicate and alum. The treated paper may retain high absorbency and permeability to water &c. or may be waterproofed by waxes, oils, or resins.
Patent GB-248737-A (GB)
Title: Improvements in or relating to apparatus for supplying air to two-stroke cycle internal combustion engines
IPC: F02B33/00
Filed: 1926-02-24
Abstract: 248,737. Sulzer FrÞres Soc. Anon. March 5, 1925, [Convention date]. Compound piston pumps.-A double-acting scavening air pump 5 for an internal combustion engine is coaxial with a doubleacting supercharging air pump 6, the two pistons 3, 4 being on a common rod 2, so that the pressure in one pump bears a fixed relationship to that simultaneously existing in the other. The crosshead 1 may also be a pump piston used to supply the fuel injection air. The suction pipe 9 of the supercharging pump may be connected either to atmosphere direct or to the delivery side of the scavenging pump, a three-way cock 13 being provided for this purpose.
Patent GB-795568-A (GB)
Title: Balanced phase-detection system
IPC: H03L7/08
Filed: 1956-02-21
Abstract: 795,568. Phase discriminators. HAZELTINE CORPORATION. Feb. 21, 1956 [March 23, 1955], No. 5299/56. Class 40 (5). In a colour television receiver a triple diode or rectifier circuit 34, 35, 36 produces two balanced D.C. voltage outputs representative of departure from two different predetermined phase relationships of the colour reference burst and colour oscillator in the receiver. The phases detected may be the in-phase and quadrature phases of the oscillator or other relative phases. The balanced outputs may respectively be used to stabilize the phase of the colour oscillator and to actuate a colour killer disabling the chroma amplifier when correct phase relation is absent. As shown the colour oscillator output may be applied to the common cathode point A of the three diodes 34, 35, 36 and the colour reference burst applied in opposite phases to the anode points D, C of the diodes 34, 36 by a transformer 40. Also a phase-splitting serial circuit of an adjustable small capacitor 44 and a tuned circuit 41 connected to the burst input permits a phase quadrature input to be applied to the anode point B of the diode 35. The D.C. voltage output from point C developed across a smoothing capacitor 47 synchronizes through a reactance circuit the colour oscillator and D.C. voltage output from point D across a smoothing capacitor 46 may operate the colour killer or mode change-over device in a two-mode automatic phase control system. At stable synchronism the vector relation of Fig. 2a obtains, B being at earth D.C. potential, across load resistors 38, 37, 39 voltages develop corresponding to the moduli of the vector differences (A-B), (A-D) and (A-C) respectively. The outputs at C, D being the differences of two opposite voltages are thus balanced if the inputs at D, C, B are made of equal amplitude. A negativegoing flyback pulse applied to the point A from the line frequency generator ensures that the circuit is gated open only during the reference burst, but may be omitted if the colour burst amplitude is sufficient itself to produce gating. In a modification, Fig. 4, the reference burst is applied at a common point A to the cathodes of diodes 36, 34 and anode of diode 35, and the colour oscillator input in opposite phase to the anodes of diodes 36, 34 at points B, D, due to the transformer 40, and in phase quadrature to the cathode of diode 35 at point C by using the phase-shift network 62, 41, the conditions being as shown in Fig. 4a at phase synchronism. Equal load resistors 64, 65, 66, 67 respectively develop voltages corresponding to the vector moduli (A-D), (A-C), (A-C) and (A-B) and balanced automatic phase-control and colour killer voltages are derived from the junction of equal resistors 67, 66 and 65, 64. Diode 69 normally short-circuits the subcarrier input but is rendered non-conductive during the burst by a line generator flyback pulse applied to the transformer 70.
Patent GB-803087-A (GB)
Title: Balanced phase-detection system
IPC: H04N9/70
Filed: 1956-02-21
Abstract: 803,087. Colour television. HAZELTINE CORPORATION. Feb. 21, 1956 [March 23, 1955], No. 5300/56. Class 40 (3). [Also in Group XL (c)] Relates to the gated phase detection system of Specification 795,568, [Group XL (c)], producing two balanced D.C. output voltages corresponding to different phase relationships of two signals. A further modification is described (Fig. 3) in which the phase relation of Fig. 3a is obtained at the points B, C, D after phase locking. In this case C is at D.C. earth potential and during phase-locked condition, a positive D.C. voltage is developed across capacitor 42 approximately proportional to the modulus of the vector difference (D-C). This, besides provid. ing the colour killer operating voltage (zero volts) during out of synchronism, varies during synchronism with the amplitude of the colour reference burst and therefore may be applied to provide automatic chrominance control (ACQ) of the chrome amplifier. This is made possible by the triple diode circuit being gated open by a flyback pulse applied at input 24 only during the phase reference burst and by the latter being made of smaller amplitude than the colour oscillator input to the circuit. The burst amplitude therefore has the desirable feature of increasing during out of synchronism, due to decrease of the ACC voltage. Tubes other than diodes or transistors may replace the diodes.