baber/WOPTO huggingface dataset:
Patent GB-1401870-A (GB)
Title: Systems for firing grid-controlled rectifiers
IPC: H02M7/155
Filed: 1972-11-21
Abstract: 1401870 Automatic control FERRANTI Ltd 27 Dec 1973 [21 Nov 1972] 53780/72 Heading G3N [Also in Division H2] In a system for firing a controlled rectifier 11, a staircase waveform 33 having steps of equal magnitude is generated from each half cycle of one polarity from the A.C. source 13, the staircase waveform 33 being compared at 24 with an analogue voltage at 31, indicative of the desired output from the controlled rectifier 11, a pulse being generated to fire the controlled rectifier 11 when the staircase waveform reaches the value of the analogue voltage at 31. The analogue voltage at 31 is preferably in the form of a staircase wave 34 having a lower frequency than 33. The Specification describes a system for providing a controlled acceleration of a D.C. motor 12 by control of the conduction angle of controlled rectifier 11 or of the number of complete half cycles it passes. A counter 16 is stepped by pulses from a 25.6 kHz oscillator 14, the output from the various stages of the counter being converted into a staircase wave 33 by means of a ladder network 17. When the staircase voltage 33 reaches the level of an analogue lower frequency staircase wave 34, a pulse is produced by amplifier 24 which triggers a thyratron or thyristor 11 so as to initiate a pulse of current in the motor 12. The average value of each pulse of current is inversely related to the magnitude of the lower frequency staircase wave 34 so that the motor 12 accelerates in steps. Gate 15 is opened following coincidence, the counter 16 being reset by the zero crossing of the A.C. 13. Fig.3 (not shown) relates to a similar circuit for generating the lower frequency staircase 34. Oscillator 14 is replaced by a Schmitt trigger synchronized with the A.C. 13 and a divide by 8 circuit is interposed before the counter 16. The frequency of the low frequency staircase wave 34 may thus be changed by by-passing the divide by 8 circuit. Fig.5 (not shown) relates to a complete block diagram employing two identical integrated circuit chips respectively for generating the staircase waves 33 and 34. A retroactive speed-control may be arranged by feeding the output from a tachogenerator to an additional input of amplifier 24. Burst firing mode is obtained by systems Figs.6-8 (not shown) in which the firing pulses are derived from a binary rate multiplier coupled to the various stages of the counter 16, the number of complete half cycles passed by the controlled rectifier 11 being a function of the magnitude of the analogue input at 31.
Patent GB-1356586-A (GB)
Title: Inhibition of calcium sulphate scale formation
IPC: C01B25/226
Filed: 1970-11-12
Abstract: 1356586 Calcium sulphate wash liquors FISONS Ltd 12 Nov 1971 [12 Nov 1970 16 Jan 1971 15 Feb 1971 24 Sept 1971] 53869/70 16 Jan 1971 15 Feb 1971 and 24 Sept 1971 Heading C1A Deposition of CaSO 4  from the liquors from washing CaSO 4 .¢H 2 O is reduced by bringing the liquors into contact with an additive before or during washing, the additive being an alkylaryl sulphonic acid or an alkylene oxide condensate of an alcohol, phenol or an alkyl phenol or derivatives or mixtures of the foregoing. Where the additive is an alkylbenzene sulphonic acid or derivative the alkyl group preferably contains 8 to 16 carbon atoms. A preferred additive comprises 50-80% of a C9-11 alkylbenzene sulphonic acid or derivative thereof with a condensate formed from 5 to 15 moles ethylene oxide per mole of octyl- or nohylphenol. The washing may be carried out in a number of stages and the additive may be added to the slurry prior to filtration, the filtered crystals or the liquids used for washing. The additive concentration is preferably 0À0002 to 0À3% by weight of the liquid phase and a temperature of 20 to 90‹ C. is preferred. The process is especially suitable for use in conjunction with the wet process for the manufacture of phosphoric acid.
Patent GB-1275129-A (GB)
Title: An antioxidant derived from green coffee beans
Inventor: LENMANN GUNTHER
IPC: C11B5/00
Filed: 1969-11-11
Abstract: 1275129 Coffee extract stabiliser HAG AG 11 Nov 1969 55119/69 Headings A2B and A2D [Also in Divisions C2 and C5] An antioxidant is obtained from green coffee beans by precipitating caffeine from an aqueous extract of the beans, removing the precipitate, making the solution alkaline and removing other solid matter therefrom, and extracting the antioxidant from the solution by partition with a solvent immiscible with water. In examples roasted coffee extract, roasted coffee beans and aniseed granules are stabilised with this antioxidant.
Patent GB-1367465-A (GB)
Title: Device for measuring the speed of a rotating shaft
IPC: G01P3/495
Filed: 1970-11-20
Abstract: 1367465 Photo-electric measurement LUMENITION Ltd 15 Nov 1971 [20 Nov 1970] 55405/70 Heading G1A A device for measuring the angular speed of a shaft includes means for providing in separate circuits in sequence a succession of voltage pulses bearing a timed relation with the speed of shaft rotation, means utilizing the pulses to develop a rotating energy field and develop a torque in a rotatable body, and means for measuring the torque, as an indication of shaft speed. Pulses developed by light passing through an aperture to a photo-cell are distributed to three magnetic field winding by an amplifier and ring counter to generate a rotating field and the rotation against a control spring of a rotatable disc, by induction is used as the speed indication.
Patent GB-1303749-A (GB)
IPC: H01J29/26
Filed: 1970-11-23
Abstract: 1303749 Cathode-ray display tubes THOMSONGSF 23 Nov 1970 [25 Nov 1969] 55676/70 Heading H1D The screen of a cathode-ray display tube comprises a first phosphor of persistent material and a second phosphor of non-persistent material, the former being associated with a barrier material so that it is not excited by electrons below a certain energy. Elements of the first phosphor may be surrounded by the barrier material and mixed with the second phosphor in a single layer (Fig. 4, not shown). Alternatively a layer of persistent phosphor may be deposited on the end wall of the tube and covered with a barrier layer on which a non- persistent phosphor is deposited (Fig. 5, not shown). The two phosphors may emit light of different colours.
Patent GB-1358105-A (GB)
Title: Process for manufacturing an oriented film from a thermoplastic synthetic resin and apparatus therefor
IPC: B29C48/08
Filed: 1971-12-02
Abstract: 1358105 Biaxially oriented films MITSUBISHI MONSANTO CHEMICAL CO 2 Dec 1971 [21 Dec 1970] 55895/71 Heading B5B Apparatus for manufacturing a biaxially oriented thermoplastic synthetic resin film 13 comprises an extruder provided with a slot orifice 1, at least one draw-down roll 2, a group of termperature-controlling rolls 3, 4, 5, 6, a pair of longitudinal orienting rolls 7, 8 each provided with a nip roll 10, 11, a feed roll 9 and a tenter 12, enclosed in chamber 14. The distance from the orifice 1 to the surface of the roll 2 is less than 50 mm. (preferably 25-30 mm.); the distance between the surface of successive rolls belonging to the group of temperaturecontrolling rolls is between 2 mm. and 10 mm. (preferably 2-5 mm.); and the distance separating the die lips of the orifice is less than 100 times (preferably 20-50 times) the thickness of the final film product. Thermoplastic synthetic resin is meltextruded as a softened sheet from the orifice 1, transferred to a draw-down roll while being stretched into a film at a longitudinal drawdown rate of 30 times at most (preferably 10-30 times), in the gap between orifice 1 and drawdown roll 2. The drawn-down film is transferred to the rolls 3, 4, 5, 6 which are controlled to a temperature suitable for stretching, and the peripheral speeds of which are so adjusted that the film is stretched at a longitudinal orienting ratio of 1À2 times at most (preferably 1À05-1À2 times) at each gap between successive rolls; the stretched film transferred to rolls 7, 8, the peripheral speeds of which are so adjusted that the film is oriented longitudinally at a ratio of at most three times (preferably 2-2À5 times); the longitudinally oriented film transferred to tenter 12 by way of feed roll 9 to be longitudinally oriented therebetween at a ratio of at most two (preferably 1À5-1À8 times); and the oriented film transversely oriented by means of tenter 12 at a ratio of at most five (preferably 2À5-3À5 times). Specified thermoplastic resins include polystyrene, rubber-reinforced polystyrene, styrene - acrylonitrile copolymer, styrene - acrylonitrile - butadiene copolymer, polyvinyl chloride and vinyl chloride-vinyl acetate copolymer.
Patent GB-1269130-A (GB)
Title: Improvements relating to ohmic contacts for semiconductor devices
IPC: H01L29/43
Filed: 1969-11-17
Abstract: 1,269,130. Semi-conductor devices. INTERNATIONAL BUSINESS MACHINES CORP. 17 Nov., 1969 [3 Jan., 1969], No. 56104/69. Heading H1K. Ohmic contact to a semi-conductor body is made within an aperture in a surface insulating layer by a layer of silicon monoxide-chromium cermet overcoated with a metal layer. A silicon or germanium body may be provided with an apertured coating of a silicon oxide, nitride, or oxide-nitride, or of a silicate glass. The cermet is applied to the entire surface at a substrate temperature of 100-500‹C. by flash evaporation of a sintered mixture of its two components or by coevaporation of the two components from separate sources. The chromium content of the cermet may be 50-90 atomic per cent. Without breaking vacuum, a layer of copper, silver or gold is applied and may be followed by a flashed layer of chromium or titanium. After selective etching to leave a contact and track pattern (resistors are formed in the pattern by the removal of the metallic layers to leave the cermet only), the system is baked for 1 hour at 300- 500‹ C. to effect diffusion of cermet components into the semi-conductor. A single- or multiplelayer insulation is applied and apertures formed at terminal areas. Further interconnection levels may be provided.
Patent GB-1451817-A (GB)
Title: System for the electronic data processing of chinese characters
IPC: B41J3/01
Filed: 1973-12-05
Abstract: 1451817 Selective signalling; control of printers C H YEH 5 Dec 1973 [7 May 1973] 56286/73 Heading G4H The invention relates to the storage and retrieval of individual ones of a large number of characters for printing, display or transmission, in particular for the printing of Chinese characters. As described, a data terminal 10, Fig. 6 incorporating a keyboard 13, a display 11 and a printer 14 is linked via a CPU 20 to other terminals and to a disc store 21. The characters are arranged in four groups according to their frequency of occurrence (groups 1-3) and to whether they are technical terms (group 4). Each group contains 160 "sections" arranged according to the Chinese phonetic alphabet, each section containing 15 characters all having the same Chinese phonetic syllable. Thus each character has a "file number" consisting of a group digit, three section digits and one (hexadecimal) character digit, which is used to access a representation of the required character in store 21. This may be represented by 14 bits, so that two 7-bit ASC11 codes may be used. Each character is represented as dots in a 24x20 matrix converted to binary and then hexadecimal form for storage (Figs. 1A-1D). The file number of a character is selected by means of group, section and character keys 134, 131, 133 on keyboard 13. This number is transmitted to the CPU which retrieves the data from store 21, converts it back to binary form, feeds it to a buffer for printing and display, and converts it to ASC11 form for transmission to another terminal. A whole page may be displayed at 11 before printing in either horizontal left/right or vertical right/left format, depending on how the data is supplied to the buffer from the CPU, which in turn depends on the setting of "function" switches 137, 139 on keyboard 13. Switches 131 are used in conjunction with four reference sheets (one for each group) each containing the 160 sections arranged to coincide with the positions of the corresponding sector switches Figs. 8 and 9, (not shown). The sheets may be located below the switches, which are then transparent and act as magnifiers, or they may be placed over the keys, which are then pressuresensitive. In an alternative embodiment Fig. 13, (not shown), the section keys and the display are absent, and a "O" switch is added to the keyboard. The file number is then generated wholly by switches 133-4, and characters are entered and printed one-by-one. Printer 14 incorporates one print head 144, Figs. 10-12, (not shown) containing a column of 24 wires (150) actuated by solenoid or fluid means, the characters being printed column-by-column from left to right across the page. Display 11 may be a CRT display or a matrix of light emitting diodes. Reference has been directed by the Comptroller to Specification 1385416.
Patent GB-1243226-A (GB)
Title: Process for manufacturing mould material and apparatus therefor
Inventor: GAWRONSKI WACLAW SAKWA JOZEF
IPC: B22C5/18
Filed: 1968-11-28
Abstract: 1,243,226. Mixing apparatus; pneumatic separation. POLITECHNIKA SLASKA. 28 Nov., 1968, No. 56409/68. Headings B1C and B2H. [Also in Division B3] Apparatus for mixing and conveying mould materials comprises containers 1, 2 and 3 connected to a storage tank 29 via a homogenising unit 24, a feeder 25 and a pneumatic tube 26. Used moulding material is collected in a receiver 10 and conveyed to the container 1 via an electromagnetic separator 12, feeder 13, a pneumatic tube 6 and a unit 7, Fig. 2, in which dust is separated and drawn off through a pipe 8. Unused moulding material is conveyed from a feeder 16 to containers 2 and 3 via pneumatic tubes 17 and 20. Dried sand may be supplied to the container 1 from a feeder 5 via pipe 6. Mixing of the materials occurs during their passage through the pipe 26 to one or more distributors. Crushing of lumps of used moulding material occurs during their passage through the pneumatic tube 6 and in the unit 7 where they strike a baffle 36. The heavy material then falls down and is conveyed to the container 1 by a chute pipe 39. Dust-laden air is withdrawn through an upper outlet pipe and passes to cyclones and filters. Non-porous adjustable screens 37 and 38 are fitted to the steel casing of the unit 7.
Patent GB-1376322-A (GB)
Title: Washing compositions
IPC: C11D3/20
Filed: 1971-12-06
Abstract: 1376322 Detergent builder compositions RHONE-PROGIL 6 Dec 1971 [8 Dec 1970] 56532/71 Heading C5D A washing composition comprises (a) a surface active agent and (b) the cis-isomer of disodium epoxy-succinate as builder. The surface active agent may be soap, sodium dodecyl benzene sulphonate or nonylphenol/ethylene oxide adduct. The composition may also include sodium metasilicate, sodium sulphate, sodium perborate, a blueing agent, an enzyme and/or an antifoaming agent.
Patent GB-565590-A (GB)
Abstract: 565,590. Electric heating. WEBB, G. W., and PROCTOR, W. F. May 18, 1943, No. 7898. Drawings to Specification. [Class 39 (iii)] [Also in Group II] In a method of melting metals and other mouldable materials, such as glass, wherein the metal to be melted is immersed in a heated bath of a molten inert material, such as salts having a lower melting point than and a different specific gravity from the metal to be melted and also a higher boiling point than the melting point of the metal to be melted, the heat transfer to the metal is effected in a bath, wherein the mass of the heating medium is so much greater than that of the metal that the temperature of the heating medium throughout its bulk is substantially uniform while the heating medium derives its heat independently of the metal to be melted. The bath is maintained at substantially the same degree of temperature during the melting operation and the temperature of the heating medium and molten metal are substantially the same. The heating of the heating medium is effected in such a manner that there is no cessation of heat input during the operation of pouring. Apparatus for carrying out the method similar to that described in Specification 554,685 is described and illustrated.
Patent GB-1162178-A (GB)
Title: Improvements in or relating to Sliding Seal Arrangements
Inventor: ALLINQUANT FERNAND STANISLAS
IPC: F16J15/3236
Filed: 1966-12-21
Abstract: 1,162,178. Piston rings; telescopic pipes. F. S. ALLINQUANT. 21 Dec., 1966 [22 Dec., 1965], No. 57135/66. Headings F2P and F2T. [Also in Division El] A seal for telescopic pipes or a piston 2 of an hydraulic pit prop comprises a flexible seal member having a body 6, an axial portion 7, a flared portion 8 and a bead 9, the seal being engaged in a recess by a flange 10b which provides axial support for the bead. When the seal is in place, the bead 9 is flexed inwardly by the pipe or cylinder wall 1 away from its seating on the flange 10b which is in sliding contact with the pipe or cylinder wall. The seal may be made of a polyamide, P.T.F.E. or metal. A static sealing lip 7a, 8a, 9a, may also be provided and the seal held in its seating by rings 5, 12 having passages 13, 12a to permit the working pressure to act upon the lips. The sliding motion of the piston of the pit prop may be controlled by a friction insert 14 in the wall of the piston.
Patent GB-1439778-A (GB)
Title: Smoking articles comprising ventilated wrappers
IPC: A24B15/16
Filed: 1973-12-13
Abstract: 1439778 Smoking articles comprising ventilated wrappers PHILIP MORRIS INC 13 Dec 1973 [26 Dec 1972] 57792/73 Heading A2C A smoking article comprises a cylinder of tobacco, a wrapper of combustible material enclosing said cylinder of tobacco, and a non- toxic composition, impervious to air and coating at least certain portions of said wrapper which are pervious to air prior to being coated with said composition, the composition being dissipatalble under the influence of heat so as to admit the passage of air through the wrapper into the cylinder of tobacco during the course of smoking the article, wherein the composition comprises a heat softenable copolymer of ethylene and vinyl acetate having a softening point above 80‹C and an amount of at least one compatible additive effective to depress the softening point to 65‹-80‹C. The additive may be a substantially non-volatile ester, e.g. the triacetate and tristearate of glycerol, the tetraacetate, tetrastearate, tetrabehenate and partially esterified stearate of pentaerythritol; methyl palmitate and dimethyl sebacate; C 12-30  fatty acids such as lauric, palmitic, stearic and behenic as well as their soaps; non-volatile hydrocarbons such as paraffins, microcrystalline wax, dotriacontane, squalene, ceresin and ofocerite; natural waxes such as bees-wax, spermaceti and candelilla wax; and C 12-30  alcohols such as lauryl, myristyl, octadecyl, behenyl or 12-hydroxy stearyl alcohols. The additive may be present in an amount 20- 350% by weight of the copolymer. The composition may also comprise an inert filler or pigment in an amount up to 250% of the total weight of the copolymer and the additive. This may be titanium dioxide, talc, calcium carbonate, barium sulphate, carbon black, powdered cellulose, silica or zinc carbonate. Dyes can also be used in the composition. The composition may include a dispersant for the inert filler or pigment, e.g. metal salts of fatty acids, a nonylorthocresol-ethylene oxide condensation product, sodium alkyl-aryl sulphonate or sodium lauryl sulphate. The material may be applied as a hot melt. The material preferably constitutes a film over the entire length of the wrapper and the thickness of the film may be up to 25Á. The composition may be placed on either or both sides of the cigarette wrapper. The wrapper may be provided with holes therein to render it pervious to air and these holes are covered with the composition so as to render the wrapper temporarily impervious to air.
Patent GB-1103150-A (GB)
Title: Fastener-driving tool
Inventor: RANGGER HERBERT
IPC: B25C1/14
Filed: 1966-12-31
Abstract: 1,103,150. Cartridge-actuated tools. HILTI A.G. 31 Dec., 1966, No. 58495/66. Heading B4C. A cartridge - actuated tool for driving fasteners, such as nails, into material, such as concrete, comprises a cartridge holder 18 displaceable relative to a driver 17, a firing plunger 19 slidable in a sleeve 23 which limits entry of the plunger into an expansion chamber 21, the sleeve having channels (58, 60, Fig. 4) through which explosive gases can escape along both the inner and outer circumferential surfaces of the sleeve. The sleeve 23 is slidable in a guide tube 10 releasably connected to an extension sleeve 11. The expansion chamber 21 is formed in the driver 17 and the cartridge holder 18 forming part of the firing plunger 19 is prevented from fully entering the recess for firing the cartridge by means of a projection 41 engaging a cap 43 on the sleeve; the projection is withdrawn to permit firing by means of a cam 39 on a control rod 38 which can be rotated by a sleeve 46 keyed to the rod. In operation, the projection is withdrawn and, upon striking a knob 20, the cartridge is fired, thereby causing the driver to drive in a nail 33. The exhaust gases in the chamber 21 first pass through the channels 60 and when, due to recoil, the firing plunger moves out of the chamber, the remaining gases flow through the channels 58; the latter channels are inclined to the axis of the plunger, thereby causing a swirling effect of the gas which cleans the guide tube of residue.
Patent GB-1351050-A (GB)
Title: Process for decolourizing polyethylene polyamines
IPC: C07D295/02
Filed: 1971-12-21
Abstract: 1351050 Decolorizing polyethylene polyamines TOYA SODA MFG CO Ltd 21 Dec 1971 [28 Dec 1970] 59358/71 Heading C2C Discoloured polyethylene polyamines (i.e. compounds containing -(-CH 2 CH 2 NH-) n - where n is 1-5, and including ethylene diamine and cyclic compounds such as piperazine and N-2- aminoethylpiperazine) are decolorized by distilling them in the presence of a polyethylene polyamine hydrochloride, preferably in amount 0À1-10 parts by weight (calculated as HCl) to 100 parts by weight of the polyethylene poly. amine present. The starting material may be the product of reaction of ethylene dichloride with ammonia.
Patent GB-1328833-A (GB)
Title: Fittings for windows or doors
IPC: E05C9/20
Filed: 1970-12-15
Abstract: 1328833 Releasable fastenings WILH FRANK GmbH 15 Dec 1970 [16 Dec 1969] 59407/70 Heading E2A A device for the longitudinal adjustable connection of flat elongate members of window or door fittings comprises a first rack 4 provided on the wide side of a first flat elongate member 1 and which meshes with a second rack 10 provided on the wide side of a second flat elongate member 3, at least one of the racks being detachably secured to its associated elongate member by the engagement of pins 14, provided on the rack in holes 15 provided on the wide side of the said associated elongate member; the racks are provided with teeth having perpendicular flanks 7, 8 and radiussed or chamfered flank edges. As shown, a push member 1 forming part of a window corner fitting 2 has connected thereto a rack 4 which is in mesh with a rack 10 integral with a coupling member 11 of U-shaped cross-section. The member 3 may have therein holes 15 and slots 16. The device is disposed in a groove 17 in the frame 18 and is covered by a rail 20.