baber/WOPTO huggingface dataset:
Patent GB-799358-A (GB)
Title: Improvements in light weight cellulose acetate fabrics
Inventor: SOWTER PERCY FREDERICK COMBE
IPC: D01F2/28
Filed: 1955-12-30
Abstract: In a process for the manufacture of lightweight cellulose-acetate woven fabrics having good resistance to the development of differential lustre effects, an acetone solution of cellulose acetate is wet spun (using as the coagulant an aqueous solution of a solvent or swelling agent for the cellulose acetate) into continuous filament yarn of total denier below 100 and filament denier below 5 whereafter, in either order, the yarn is woven into a light-weight fabric and subjected to a treatment whereby the acetyl value of the cellulose acetate is increased without causing it to become swollen to any substantial extent. Preferably, the further acetylation step is conducted after the yarn has been woven into a fabric.  The yarn may be wet spun from cellulose acetate having an acetyl value of 51.5-55 per cent into a coagulating bath of aqueous diethylene glycol diacetate. Further acetylation of the woven fabric to an acetyl content of 59-62.5 per cent may be achieved by treating the fabric with a mixture of acetic anhydride, a small proportion of an acetylation catalyst, e.g. sulphuric or perchloric acid, and a non-solvent diluent for the cellulose acetate, e.g. toluene, benzene or carbon tetrachloride.  A small proportion of acetic acid may also be present.  The yarn or fabric, preferably before the further acetylation step, may be treated with a lower aliphatic alcohol, as described in Specification 793,527.  The safe ironing temperature of the fabric may then be raised by subjecting it to the action of dry heat, wet steam or hot water, as described in Specification 758,442, or of an organic liquid swelling agent, as described in Specification 776,346.  The wet-spun filaments are preferably subjected to a draw-down during spinning, and suitable spinning procedures are described in Specifications 654,900, 706,693, 720,187 and 787,557. The process is applicable not only to fabrics consisting entirely of the wet-spun cellulose acetate yarn but also to fabrics which contain additionally other yarn, which may or may not be susceptible to acetylation, e.g. a fabric made with a warp of the wet-spun cellulose acetate and a weft of dry-spin cellulose acetate may be treated. Specifications 787,556, 787,558, 787,559, 787,560, 787,562, 787,563, 787,564 and 797,194 also are referred to.
Patent GB-794284-A (GB)
Title: Improvements in or relating to circuits for measuring the minimum amplitude of modulated waves
IPC: G01R29/06
Filed: 1955-12-30
Abstract: 794,284. Modulation measurement. SIEMENS & HALSKE AKT.-GES. Dec. 30, 1955 [Dec. 31, 1954], No. 37484/55. Class 37. [Also in Group XL (b)] Apparatus measuring the minimum amplitude of a modulated wave wherein the modulation signal is half-wave rectified from the wave and is coupled to a capacitance over a further halfwave rectifier so poled that the capacitance voltage rapidly follows decreases in modulation level but slowly follows increases therein, and is applied to a measuring device. A video modulated television signal is rectified by metal rectifier 3 (Fig. 2), to develop across capacitance 4 and resistance 5 a video voltage increasing from white level to black level which is connected to capacitance 7 over oppositelypoled rectifier 6 so that the capacitance voltage slowly follows increases but rapidly follows decreases of the video signal, and is a measure of the full white modulation level. This voltage is amplified by triode 8 for comparison in meter 12 with a reference voltage (which may be derived from the peak of the modulated carrier) amplified by similar triode 10. Relay 13 in parallel with instrument 12 may operate an alarm when the full white modulation level falls below a predetermined value.
Patent GB-1351810-A (GB)
Title: Photographic camera
IPC: G03B3/02
Filed: 1971-08-10
Abstract: 1351810 Cameras BALDA-WERKE PHOTOGRAPHISCHE GERATE UND KUNSTSTOFF R GRUTER K G 10 Aug 1971 [13 Aug 1970] 37494/71 Addition to 1210837 Heading G2A A collapsible camera with a slidable cover plate for the lens, as claimed in Claim 1 of Specification 1210837, has a displaceably mounted member 122 which can be moved so as to provide a positive connection for transmission of force to the said member from the shutter release slide 102. Fig.1 shows the mechanism in the non-operative position, in which the slide 102 is pushed into the camera with the upper surface of its top button 103 almost flush with the camera surface. The slide is retained in this position by an interlocking arrangement of its lower end with the left-hand end of a cam slide 134. In order to make an exposure, the slide 102 is initially pressed downwards, against its loading spring 116. Slides 102 and 134 are thus mutually disengaged from each other, and slide 134 is drawn to the right by its spring 138 into the Fig.2 (not shown) position, during which movement the objective lens and cover plate are actuated as described in Specification 1210837. Also during this movement a lug on slide 134 strikes a part 131 of a coupling lever 125 which is slidably pivoted on a slide 122, itself slidably mounted on a plate 117 fixed to the camera housing. Lever 125 is thus pivoted anti-clockwise against a spring 130 so that a nose 128 at its upper end bears against an arm 113 of slide 102. After disengagement from slide 134, slide 102 is now drawn upwards by spring 116 into its operative position Fig.3 (not  shown). As arm 113 moves clear of nose 128 the latter latches underneath the arm, as seen in Fig.3. Thus a positive connection is now made between slide 102 and lever 125, i.e. with slide 122. When release slide 102, now in its operative position, is pressed downwards, the shutter release is actuated, as described in Specification 1256474. During this movement of slide 102, lever 125 and slide 122 are forced downwards so that the part 131 locks between a pair of lugs 150, 151 on slide 134, and, by bearing against a fixed stop 132, prevents retraction of slide 134 after the release operation has started. After the exposure has been completed cam slide 134 is pushed to the left by means of its button 140. The lever 125 is pivoted out of engagement with arm 113, so that the positive connection is broken, and an inclined surface 146 on slide 134 engages an inclined surface 111 at the lower end of release slide 102, draws it down again into the Fig.1 position, and latches it there.
Patent GB-358368-A (GB)
Title: Improvements in or relating to kerr and similar electro-optical cells
IPC: G02F1/07
Filed: 1930-12-12
Abstract: 358,368. Electro-optical light valves. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London. -(Assignees of Bloomenthal, S.; 173, West 188th Street, New York, U.S.A.) Dec. 12, 1930, No. 37571. Convention date, Dec. 12, 1929. [Class 40 (iii).] An electromagnetic bias is applied to an electrostatically controlled Kerr or like cell 27, of appropriate strength to introduce a path difference of a quarter wavelength between the two waves having vibrations parallel and perpendicular to the magnetic field. The signals are applied to electrodes 7, 9 and the magnetic field is produced by a magnet 21 with its poles 23, 25 in the liquid of the cell, which may be nitrobenzene, carbondisulphide, aniline, toluol, xylol, cumol, chloroform, methylalcohol, amylchloride, or iodobenzol.
Patent GB-791166-A (GB)
Title: Method for reducing the foaming tendency and for enhancing the wetting power of mercerising liquors
IPC: D06M13/137
Filed: 1954-12-29
Abstract: The foaming tendency of alkaline mercerizing liquors is reduced, and their wetting power is enhanced, by incorporating in the liquors (a) the acid sulphate of 2-ethyl butanol-1 or a salt thereof, preferably in a proportion of 20-35 per cent of the mixture added to the liquors, (b) either (i) a sparingly water-soluble condensation product of an alcohol containing at least three carbon atoms, such as (a) substituted or unsubstituted, primary, secondary, or tertiary aliphatic alcohol, a cycloaliphatic alcohol, or a terpene alcohol or a mixture of terpene alcohols as contained, for example, in fine oil, with at least one molecular proportion each of ethylene oxide and propylene oxide, or (ii) an acetal of such an alcohol, either constituent being present preferably in a proportion of 0.2-5.0 per cent of the mixture added, and (c) a solution promoter for the condensation product or acetal, preferably in a proportion of 3-7 per cent of the added mixture.  In addition there may also be included (d) a minor proportion, with respect to the added mixture of the acid sulphate of an aliphatic alcohol containing 4-12 carbon atoms or a salt thereof (other than the acid sulphate of 2-ethyl butanol-1 or its salts), preferably the sodium salt of the acid sulphate of 2-ethyl hexanol-1, and (e) about 1-3 per cent based on the mixture added to the liquor, of an alcohol sparingly soluble in water, particularly 2-ethyl hexanol-1.  A suitable sparingly water-soluble condensation product is 1-(b -butoxyethoxy-) propanol-2, obtained by condensing n-butanol in turn with one molecular proportion, each of ethylene oxide and propylene oxide in that order.  Suitable acetals are obtained from symmetrical secondary alcohols, and a specified example is di-isobutyl carbinol formal.  As solution promoters, monoetherified polyethylene glycols, such as diethylene glycol monoethyl- or monobutyl-ether, are suitable.  The compositions are suitably made up as aqueous solutions of the concentrations stated, which are then added directly to the mercerizing baths, generally in a proportion of 4 c.c. per litre.  The mercerizing baths may also contain auxiliary substances such as phenols and generally comprise sodium hydroxide solutions of concentration 30-36 DEG  B<\>e.  They may be used at a temperature as low as 10 DEG  C.
Patent GB-1502786-A (GB)
Title: Process and equipment for removing a slag cake from a reactor
IPC: B08B9/08
Filed: 1975-04-11
Abstract: 1502786 Hearths; reactor bodies CHEMISCHE WERKE HULS AG 11 April 1975 [13 April 1974] 37894/77 Divided out of 1502785 Heading F4B In a reactor, particularly for the gasification of heavy oil with steam, the bottom is closed by a removable base-plate 1, and a prefabricated frustoconical refractory member 4 co-operates with a refractory ring 3 so that after removing the base-plate 1, and the used refractory member 4 and removing slag by the method of the parent Specification, the reactor may be prepared for restarting by inserting a fresh prefabricated frustoconical plug 4 and securing the base-plate 1.
Patent GB-1283079-A (GB)
Title: A recording method using organic halogen compounds
IPC: G03C1/675
Filed: 1969-07-29
Abstract: 1283079 Recording method using organic halogen compounds CANON K K 29 July 1969 [29 July 1968] 37947/69 Headings B6C and CA13 A method of recording comprises subjecting an organic halogen compound to the action of a catalyst comprising an organic metal salt which can be reduced by irradiation, before or after the catalyst has been subjected to activating irradiation, so as to result in the production of free radicals in the organic halogen compound and subjecting an image-forming compound sensitive to free radicals and/or a halogen acid secondarily formed from the free radicals to the action of the organic halogen compound so activated. The organic metal salt may be an oxalate, acetate, basic salt or metal complex e.g. potassium oxalate, cobalt oxalate, acetates of monovalent, divalent, trivalent or tetravalent metals, Cu(OH) 2 (CH 3 COO) 4  or a metal complex salt of the Formula:- wherein R 1  and R 2  are H, alkyl, aralkyl or aryl; and Me is a metal atom. The organic helogen compound may have the Formula:- RCX 3  wherein R is H, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl; and X is F, Cl, Br or I, the X atoms not necessarily all being the same halogen. The image-forming material may form an image by forming a colour, fading or losing all colour, or by polymerizing. A photosensitive member comprising the catalyst, organic halogen compound and image-forming material may be imagewise exposed to activate the catalyst and thereby form an image. The photo-sensitive member may comprise the catalyst and control of image position may be effected by controlling the position of application of the radiation or of a treating material containing the organic halogen compound and the image-forming material. Exposure may be imagewise or overall depending on the distribution of the treating material. Alternatively the photo-sensitive member may comprise the catalyst and the organic halogen compound or the catalyst and the image-forming material, the other component being in the treating material. When the treating material contains the catalyst it may be exposed before imagewise application e.g. using a stencil, to the member comprising the other component(s).
Patent GB-1211013-A (GB)
Title: Process for finishing cellulosic materials
IPC: D06M15/423
Filed: 1967-08-21
Abstract: 1,211,013. Dry cleaning cellulosic materials. VEREINIGTE FARBEREIEN G.m.b.H. 21 Aug., 1967 [19 Aug., 1966], No. 38446/67. Heading C5D. [Also in Division D1] A dry-cleaning composition used in the treatment of cellulosic textile materials impregnated with a cross-linking resin, comprises a chlorine- or bromine-containing ethylene carbonate in a dry-cleaning solvent, e.g. perchloroethylene or trichloroethylene Di., tri- or tetra-chloro or bromo-compounds of ethylene carbonate may be used.
Patent GB-1409970-A (GB)
Title: Gameboard
IPC: A63F3/06
Filed: 1973-08-14
Abstract: 1409970 Indoor games KOHNER BROS Inc 14 Aug 1973 38477/73 Heading A6H A board for playing a game such as Bingo comprises two frames 12, 14 joined at the depending edges of their peripheral walls 20, 22 so that holes 24 in the panel 16 of frame 12 are aligned with similar holes in the panel of frame 24. Sleeves (26) Figs. 4 and 5 (not shown), concentric with pairs of aligned holes, form channels between the panels, and in each sleeve is slida'bly mounted a single disc 32 bearing indicia on its top and bottom surfaces. Ears on the disc cooperate with slots in the sleeves to prevent rotation of the discs. The discs thus constitute captive playing pieces or markers which can be depressed from a position adjacent the surface of one panel to a similar position relative to the other panel, the two panels forming alternative playing faces.
Patent GB-1471560-A (GB)
Title: Apparatus for feeding synthetic material to a mould
IPC: B29C44/42
Filed: 1974-09-03
Abstract: 1471560 Divided sprue runner DEMAG KUNSTSTOFFTECHNIK GmbH 3 Sept 1974 [14 Sept 1973] 38495/74 Heading B5A Apparatus for feeding synthetic material to a mould 2 comprises a mixing chamber 7 and a sprue runner 9 which is branched so that material fed from the mixing chamber is divided into at least two equal parts, the branches 16, 17 of the sprue runner leading to a common section 19 in which the divided parts of the material are recombined prior to feeding to the mould each branch of the sprue runner having at least one constriction 18 therein, with all the branches having the same number and configuration of restrictions. As shown in Fig. 3, the constriction 18 is formed at the inlet of each branch and the cross-section of the branch increases steadily downstream of the construction. The common section 19 may be bent, as shown, and constricted at the bend. In Figs. 4, 5 (not shown), two branches (22, 23) recombine at (24) and then redivide into four branches (25 ... 28), recombining at (29).
Patent GB-904646-A (GB)
Title: Electric blasting cap
IPC: F42B3/12
Filed: 1960-11-10
Abstract: 904,646. Electric detonators. NITROGLYCERIN A.B. Nov. 10, 1960 [Nov. 11, 1959], No. 38614/60. Class 9 (1). An electric detonator comprises a casing 1, an explosive charge 2 and a bridge wire of resistance R G  ohms, the value of R G  being so chosen that the minimum ignition current required is greater than 1 amp. An auxiliary resistance is connected in series with the bridge wire and its resistance R 1  ohms is chosen so that the total detonator resistance R S  ohms measured at the free ends of the connecting wires 4 corresponds to a minimum ignition voltage greater than 3.5 volts. The auxiliary resistance within the casing 1 may be dispensed with and the connecting wires themselves so formed that they provide, when in series with the bridge wire, a suitable resistance value R S  ohms. Specification 316,042 is referred to.
Patent GB-1426375-A (GB)
Title: Machine and method for the continuous production of boards of  bonded expanded perlite particles
IPC: C04B28/26
Filed: 1973-08-16
Abstract: 1426375 Laminating method and apparatus D J HACKER 16 Aug 1973 38670/73 Heading B5N [Also in Division C3] A method of forming a double-faced laminate comprises mixing pre-expanded perlite particles with one or more additives to form a viscous paste, discharging the paste as a layer between two continuous lengths of facing material, passing the resultant assembly past a succession of rollers to form a laminate of the desired thickness and cutting the resultant laminate to length. The perlite particles to form the paste may be cold, alternatively, they may be expanded in a furnace and mixed with the additives whilst hot, specified additives being a mixture of titanium dioxide, sodium silicate, silica, glass fibres and fire clay, one or more materials to assist the hardening of the paste being added during formation of the paste. Specified facing materials are metal, e.g. aluminium or tin, cardboard, glass fibre, paper, plastics or a mesh material. A machine for effecting the method comprises means for feeding pre-expanded perlite particles to a mixing machine equipped with means for mixing the additives with the particles, gravity hoppers for discharging the paste as a layer, means for feeding paste from the mixing chamber to the hoppers, a succession of rollers downstream of the hoppers and capable of adjustment to produce a layer of the required thickness, means for supplying facing materials from rolls and applying a facing material to each face of the layer upstream of the rollers and travelling circular saws to cut the board to length. The apparatus may also comprise a furnace for pre-expanding the particles.
Patent GB-1270607-A (GB)
Title: Production of motor and jet fuels
Inventor: HAHN FREDERICK KYLE
IPC: C10G65/12
Filed: 1970-08-12
Abstract: 1,270,607. Treating petroleum. TEXACO DEVELOPMENT CORP. 12 Aug., 1970, No. 38760/70. Heading C5E. Gas oil is treated by hydrocracking with a catalyst comprising a hydrogenating component supported on a nitrogen-resistant base comprising an amorphous oxide and a crystalline zeolite of reduced alkali metal content, hydrotreating the hydrocracked effluent with a sulphur-resistant catalyst at a pressure substantially the same as the hydrocracking pressure to saturate aromatics and recovering a jet fuel fraction and a motor fuel fraction. The hydrocracking can be carried out at 600- 850‹ F. and 200-10,000 p.s.i.g. using a catalyst comprising Pd, Ni, Co, Fe, Mo, W, Cr or V, an oxide such as SiO 2 , Al 2 O 3 , MgO, ZrO 2  or BeO which can have been treated with HF and a zeolite such as a decationized zeolite Y. The hydrotreating can be carried out at 300-800‹ F. using a catalyst comprising an oxide or sulphide of Co, Ni, Fe, Mo, W, Cr or V on SiO 2 , Al 2 O 3 , ZrO 2  or MgO. As shown a crude oil 11 is distilled to produce a light naphtha 13 boiling up to 235‹ F., a heavy naphtha-kerosene 14 boiling from 235-525‹ F., a gas oil 15 boiling from 525-900‹ F. and a residue 16. The gas oil 15 is subjected to fluid cracking at 21 with a zeolitic catalyst at 910‹ F. and then separated into a light naphtha 24 boiling up to 325‹ F., a heavy naphtha-kerosene fraction 25, a fraction 26 boiling from 525-800‹ F. and a heavy gas oil 56. The fraction 26 is mixed with hydrogen 27 and subjected to hydrocracking at 28 with a catalyst containing Ni and W supported on a base comprising decationized zeolite Y, silica and alumina. The hydrocracked effluent is cooled by mixing with the naphthakerosene streams 14 and 25 and the mixture is hydrotreated at 32 with a catalyst comprising Ni and W on alumina. The hydrotreated effluent is separated to provide a recycle hydrogen stream 35, a light naphtha 41 boiling up to 235‹ F., a heavy naphtha 42 boiling from 235 to 325‹ F., a jet fuel product 43 boiling from 325‹ to 525‹ F. and a heavier fraction 44 which is recycled to the fluid cracking unit 21. The heavy naphtha 42 is reformed at 46 with hydrogen 45 and a catalyst comprising Pt on HF treated alumina at 930‹F. and 500 p.s.i.g. to produce a motor fuel 53. A larger proportion of C 5 -425‹ F. motor fuel can be obtained by operating the fractionator 23 to produce a 425‹ F. end point naphtha 24, and a 425-525‹ F. jet fuel 25 and operating the fractionator 48 to produce a 235‹ F. end point overhead 41, a 235-425‹ F. naphtha 42 and a 425-525‹ F. jet fuel fraction 43.
Patent GB-1075482-A (GB)
Title: Tube bending
IPC: B21D7/024
Filed: 1964-09-23
Abstract: 1,075,482. Angular bending. HILGERS MASCHINEN-UND APPARATE BAUANSTALT m.b.H. Sept. 23, 1964 [Oct. 29, 1963], No. 38775/64. Heading B3E. In the bending of tubes by means of a rotatable bending pattern, an axial force is applied to the non-bent portion of the tube before the pattern is rotated. During bending, the axial force is gradually reduced.
Patent GB-906035-A (GB)
Title: Improvements in or relating to the purification of terephthalic acid
IPC: C08G77/00
Filed: 1958-12-02
Abstract: Terephthalic acid containing less than 4% of other aromatic acids is purified by extracting non-esterifiable acidic constituents with liquid water at a temperature in the range of 250-500 DEG F. and separating the water extract, at a temperature in the same range, from undissolved terephthalic acid.  Water extraction may be conducted by forming a slurry of finely divided terephthalic acid with water at the selected temperature and then filtering the slurry at a temperature at or close to that at which extraction is conducted, or by percolating the desired quantity of hot water through a charge of terephthalic acid packed in a pressure-resistant container, or by washing a filter or centrifuge cake with the hot water.  The terephthalic acid may have been produced by liquid phase oxidation of a p-disubstituted benzene with molecular oxygen.  The purified terephthalic acid may be esterified with methanol and the dimethyl ester produced may be subjected to distillation to obtain a dimethyl terephthalate heart cut having an acid number below 0.1. Esterification may be conducted in presence of catalysts such as sodium methoxide, sulphuric acid, sulphonic acids, HCl, BF3, dihydroxy fluorboric acid, silica gel, ion exchange resins, elemental mercury and other metals, metal oxides and carboxylates. p
Patent GB-1321259-A (GB)
Title: Strain relief clamp for wire bundles
Inventor: MCKNIGHT T L
IPC: H01R13/56
Filed: 1970-08-12
Abstract: 1321259 Strain relief clamps GLENAIR Inc 12 Aug 1970 [22 Sept 1969] 38856/70 Heading H2E A clamp 15 for securing a bundle 12 of wires at an angle relative to a connector 10 comprises a collar 20 screwed or otherwise connected to the connector and a wire bundle guide 30 secured to the collar by a means which prevents axial movement but permits rotational movement of the guide relative to the collar. The guide comprises a tubular portion 31 and an arm 32 of curved transverse cross-section extending therefrom at the angle at which the wire bundle approaches the connector and terminating in an arcuate member 33 for holding the wire bundle 12, which is attached to the arm by a binder 41. The collar 20 and a tubular portion 31 of the guide each have a groove 36, 37 respectively in which a ring 38 is engaged to secure the guide and collar together. The guide may be releasably locked in a fixed position relative to the collar by a set screw 47 in the collar engaging the tubular portion 31 or by complementary serrations provided on the connector and guide. (For Figures see next page)